JP2001247102A - Apparatus for making bag of film in lateral bag-making and filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a single packaging machine to use films different in nature in common. SOLUTION: Side plates 20 for contact-guiding sides of a film F formed into a cylinder are placed on an upper surface of a pair of fixed plates 16, 16 for supporting and guiding a lower portion of the cylindrical film F. A swing plate 24 for supporting and guiding the lower portion of the film F formed into a cylinder is horizontally swingably pivoted to the upper surface of each fixed plate 16. An introduction plate 32 for supporting and guiding the lower portion of the film F formed into a cylinder is horizontally swingably pivoted to a lower surface of each side plate 20. A bag-making wing 56 for setting a bag-making height of the cylindrical film F is placed at an upstream end of each side plate 20. An anti-adhesion treatment of the film is performed on surfaces of the bag-making wing 56, the side plates 20, the introduction plate 32, the swing plate 24, the fixed plates 16, a guide plate or the like on which the film F passes through in contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film bag making apparatus used in a horizontal packaging machine.

[0002]

2. Description of the Related Art In a horizontal stretch wrapping machine using a film for stretch shrink wrapping, which is thinner than a general pillow wrapping film and has a self-adhesive property and has a large frictional resistance, such a film is used. When a film is formed into a cylindrical shape, good bag making cannot be performed by a bag making device for pillow packaging due to its material. Therefore, in the case of such a stretch packaging machine, for example,
As disclosed in JP-A-291504, a belt-shaped stretch film is transported in the article transport direction above the conveyor apparatus with respect to the article transported by the conveyor apparatus, and the stretch film is expanded and a tube is wound around the article. What is constituted so that it may be covered in a shape and packaged is generally adopted. 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 in a device for obtaining a package with close contact, packaging is performed using the stretch packaging machine for convenience.

[0003]

The stretch wrapping machine described above is handled as a dedicated machine for wrapping articles with a stretch film, and cannot perform a general pillow wrapping. Each packaging machine corresponding to the film to be used was installed. However, as in today, despite having to perform high-mix low-volume production according to the user's preference, it is necessary to install a dedicated packaging machine for each film of different properties and perform production.
There are many problems, such as an increase in the installation space of the production line, an undesirable increase in production efficiency, and an increase in the purchase cost of the packaging machine.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the prior art, and has been proposed to solve the problem suitably. It is an object of the present invention to provide a film bag making apparatus in a horizontal bag making and filling machine that can also serve as a bag.

[0005]

[MEANS FOR SOLVING THE PROBLEMS]
In order to suitably achieve the intended purpose, the present invention is a film bag making apparatus for forming a belt-like film into a cylindrical shape in the feeding process, at least in a portion where the film comes into contact with and passes through the film. It is characterized by having been subjected to an anti-adhesion treatment.

[0006]

Since the film of the film bag making apparatus is subjected to an anti-adhesion treatment on the portion where the film comes into contact with the film, a smooth bag-making can be achieved even when a film having self-adhesion is used. That is, a film for general pillow packaging and a film for stretch shrink packaging,
Films of different properties can be shared by one packaging machine. In addition, since an anti-adhesion member is provided at the base end of the film entry side in the film bag making apparatus, and the first contact edge of the member with the film is formed in an R shape, even a thin film having self-adhesion can be used. Thus, smooth introduction into the bag making apparatus can be achieved and good bag making can be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of a film bag making apparatus in a horizontal bag making and filling machine according to the present invention will be described with reference to the accompanying drawings.

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 feeds a belt-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. This base 12
As shown in FIG. 3, a concave portion 12 a that is recessed downward is formed in a portion corresponding to the center of the film feeding line of FIG. , So as not to interfere with the base 12.

On the upper surface of the base 12, a pair of fixed plates 1 are symmetrically arranged in the width direction with the center of the film feeding line interposed therebetween.
6, 16 are arranged horizontally via spacers 17, 17, and a gap S of a required size is defined between the opposed sides of the fixed plates 16, 16 in parallel with the film feeding direction. The two fixing plates 16, 16 function to support and guide the lower part of the cylindrical film F in a contact state.
Is fed to the downstream side in a state where the overlapping portion in the longitudinal direction faces downward through the gap S. 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. The vicinity of the longitudinal edge of the film F to be formed into a cylindrical shape is the two inclined sides 16a,
The overlapping portion is formed by being folded downward through 16a. In addition, on the lower surface of the fixed plates 16, 16 adjacent to the inclined sides 16 a, guide plates 18, 18 are opposed to both sides sandwiching the gap S and are vertically suspended in a C-shape. The overlapping portion in the longitudinal direction of the cylindrical film F is guided in contact and fed downstream.

On the upper surfaces of the fixing plates 16, 16,
While guiding the side part of the film F formed into a cylindrical shape in a contact state, a pair of side plates 20, 20 for setting the width dimension of the cylindrical film F are separated in the width direction sandwiching the center of the film feeding line. The opposite side plates 20, 20 are arranged so as to move obliquely with respect to the film feeding direction by an adjustment mechanism described later. As shown in FIG. 2, each side plate 20 has a parallel portion 20 extending along the fixed plate 16.
and an inclined portion 20 extending upward from the upstream end of the parallel portion 20a in the film feeding direction toward the upstream side.
b. On the upper surface of each fixed plate 16, a swinging plate 24 horizontally extending from the upstream end to the upstream side is provided with a fulcrum pin 26 with respect to the fixed plate 16.
It is pivotally supported via a horizontal swing. Both swinging plates 24, 24 facing each other across the center of the film feeding line
Are inclined sides 24a separated from the other swing plate 24 toward the upstream side, and a V-shaped introduction portion is defined between the opposed inclined sides 24a, 24a. On the upper surfaces of the swing plates 24, 24, the lower portion of the film F formed into a cylindrical shape is guided in contact and fed downstream, and the vicinity of the longitudinal edge of the film F is tilted. It is designed to be folded downward through the sides 24a, 24a.

On the lower surface on the upstream side of each side plate 20, a substantially triangular introduction plate 32 is pivotally supported via a fulcrum pin 34 disposed at the upstream end so as to be horizontally swingable. The introduction plate 32 is slidably mounted on the upper surface of the swing plate 24. That is, the introduction plates 32 on both sides of the center of the film feeding line,
On the upper surface of the film 32, the lower portion of the film F formed into a cylindrical shape is contacted and guided, and then the lower portion of the film F is continuously contacted and guided by the swing plates 24,24. 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 are formed in the long hole 24b.
Are slidably inserted. In this state, the side of the introduction plate 32 facing the other introduction plate 32 is an inclined side 32a set at substantially the same inclination angle as the inclined side 24a of the corresponding swing plate 24, and the width adjustment described later 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 located on both inclined sides 32a, 3 of the introduction plates 32, 32.
The oscillating plates 24, 24 are further folded downward at the two inclined sides 24a, 24a. 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. It is configured as follows.

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.
(The side plate 20 extends from the downstream side in the film feeding direction to the upstream side.
A mounting member 37 which is inclined away from 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 of the base 12 in the width direction and a holding plate 40 disposed upwardly 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 that meshes 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. Note that 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.

As shown in FIG. 3, bevel gears 5 are provided at both ends of a shaft 48 rotatably disposed on the base 12.
0 is fixed, and each bevel gear 50 has a corresponding pinion 4
The second rotating shaft 46 meshes with a bevel gear 52 fixed to the lower end. Further, the holding plate 40 of one pinion 42
A width adjusting handle 54 is disposed on a rotating shaft 46 extending upwardly of the shaft. By rotating the adjusting handle 54 in the forward and reverse directions, the pair of pinions 42 and 42 rotate in the opposite directions to each other. Thus, the pair of side plates 20, 20 are configured to move obliquely with respect to the feeding direction and move toward and away from each other while facing each other with the center of the film feeding line interposed therebetween.

At the upstream end of the side plates 20, 20, a pair of bag making wings 56, which set the bag making height of the cylindrical film F,
Reference numeral 56 is provided so as to sandwich the center of the film feeding line. As shown in FIG. 3, each bag making wing 56 has a corresponding side plate 2.
0, and a wing portion 56b extending upward from the lower edge of the vertical side portion 56a so as to incline outward from the lower side edge of the vertical side portion 56a.
The downstream end of “a” is pivotally supported by the side plate 20 via a fulcrum pin 58 so as to be vertically swingable. And both bag making wings 56,5
The belt-shaped film F drawn out and fed from above toward the film entry side base end of the wings 56b, 56b of No. 6 is guided in contact and fed downstream to form the film F into a cylindrical shape. It has become so.

A height adjusting handle 60 is rotatably disposed outside the inclined portion 20b of each side plate 20, and a connecting member 62 which rotates integrally with the handle 60 is provided with the corresponding bag making. The wing 56 is pivotally supported by a vertical side portion 56a. Then, the height adjusting handle 60 is rotated in the forward and reverse directions to tilt the bag making wing 56 in the up and down direction via the connecting member 62, and the bending upstream end position between the vertical side portion 56a and the wing portion 56b is variable. By doing so, the bag making height of the cylindrical film F is adjusted. The height adjustment handle 60 is attached to the side plate 20.
By engaging a ball, which is provided in the handle 60 so as to be able to advance and retreat and is elastically urged, with a concave portion which is provided at a predetermined interval in the circumferential direction, the ball can be positioned intermittently in the circumferential direction. ing.

As shown in FIG. 1, a scale portion 60a having a scale corresponding to a bag making height dimension is provided on a peripheral surface of the height adjusting handle 60 at a required interval. Reference lines L are provided at corresponding upper surface positions of the reference numeral 20. That is, a pair of height adjustment handles 60,
In the case of individually adjusting 60, by rotating each handle 60 so that the same scale matches the reference line L, the pair of bag-making wings 56, 56 can be positioned and adjusted at the same position.

At the base end of the wing portion 56b of each of the bag-making wings 56 on the film entry side, an anti-adhesion formed by machining (cutting) using, for example, ultra-high polyethylene having low friction characteristics in a resin material. A member 64 is provided to extend in the width direction. This anti-adhesion member 64
Is cut so as to prevent sticking of the film, so that the surface is formed slightly uneven, so that the film F having the stickiness can be smoothly transferred. Further, the first contact edge (the film entry side base end) of the anti-adhesion member 64 with the film F is formed in a required R (arc) shape. That is, the belt-like film F fed from the supply source to the film bag making apparatus 10
Is a pair of the anti-adhesion members 64, 64 having an R shape without directly contacting the edge (corner where two surfaces intersect) on the film entry side of the thin wing portion 56b. The upper surface of the bag making device 1 is guided in contact with the side base end.
After being introduced at 0, it is configured to be fed downstream so that thin films 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 the film from sticking.

In the film bag making apparatus 10 constructed as described above, the bag F, the side plate 20, the introduction plate 32, the swing plate 24, the fixed plate 16, and the guide plate 18 through which the film F contacts and passes through. The surface of the film is subjected to an anti-adhesion treatment by a shot process or the like, so that a film having a self-adhesive action such as a stretch shrink film can be formed into a good bag. In addition, each member 56,20,32,24,16,1
The anti-adhesion treatment applied to 8 may be performed not on the entire surface but only on the surface that the film F contacts. Incidentally, the material of the side plate 20 is aluminum, and the other members 56, 3
The material of 2,24,16,18 is stainless steel.

[0019]

Next, the operation of the film bag making apparatus in the horizontal bag making and filling machine according to the above embodiment will be described.

When the belt-like film F is fed toward the film bag-making apparatus 10, an anti-adhesion member provided on a pair of bag-making wings 56, 56, whose upper surfaces of the film F are spaced apart in the width direction. As a result of being bent in contact with the film entrance side base end of the film 64, 64 and guided by the bag making wings 56, 56, the paper is fed downstream along the inside of both side plates 20, 20 as a result. , And is formed in a substantially cylindrical shape whose lower part is open. The vicinity of the edge in the longitudinal direction of the film F is the inclined side 32a of the introduction plate 32 and the inclined side 24 of the swing plate 24.
a and is introduced into the gap S while being contacted and guided by the inclined side 16a of the fixed plate 16, thereby forming a cylindrical film F having a longitudinally overlapped portion. And, in the film F formed into a cylindrical shape,
An unillustrated article to be packed is supplied and supplied from an upstream side through an appropriate supply unit.

In this case, the film bag making apparatus 10
Each member 56, 20, 3 through which the film F contacts and passes
The surfaces of 2, 24, 16, and 18 are subjected to a film anti-adhesion treatment, so that the film F can be smoothly transferred. In addition, each of the members 56, 20, 32, 24, 16 for supporting the bottom surface and the side surfaces of the packaged object with the film F interposed therebetween.
In addition, since the frictional resistance with the film F is reduced, even if the stretch shrink film is thin and has self-adhesiveness, the bag can be satisfactorily formed.

When a cylindrical film F having a different bag making width and height is formed by changing the order, the width adjusting handle 54 is rotated in a required direction so that the pair of pinions 42, 42 can be mutually moved. Rotate in the opposite direction. As a result, the racks 36 meshing with the pinions 42, 42,
The pair of side plates 20 and 20 are moved obliquely in parallel to the film feeding direction via 36 and adjusted to a position corresponding to the width of the cylindrical film F according to the new order. In addition, the introduction plate 3 corresponding to the movement of each side plate 20.
2 moves along the long hole 24b of the swing plate 24, and the two plates 32, 24 horizontally swing with the fulcrum pins 34, 26 as fulcrums, and the respective inclined sides 32a, 24a are aligned substantially in 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, so that the cylindrical film F It is possible to smoothly guide the overlap of the overlapping portion.

Further, the height adjusting handles 60 provided on each side plate 20 are rotated in required directions, and
Is positioned so that the scale corresponding to the desired bag making height dimension provided on the side plate 20 coincides with the reference line L of the side plate 20, so that the bag making wings 56 have a bag making height of the cylindrical film F according to the new order. Is changed to the position corresponding to

[0024]

[Modifications] 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 the shot processing, fluorine processing, or subjected to various other frictional resistance reduction processing, or made of a material of a material capable of preventing the film bag making device, 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 formed of a resin material such as engineering plastic or a material made of other materials. There may be. Further, the bag-making wing is not always necessary, and an anti-adhesion member is disposed directly at a base end (for example, an upstream end of a side plate) of a film entering side into a film-making apparatus, and an initial contact end of the member with the film is provided. The edge may be rounded.

[0025]

As described above, in the film bag making apparatus of the horizontal bag making and filling machine according to the first aspect of the present invention, at least a portion of the film bag making apparatus that passes through the contact with the film is subjected to an anti-sticking treatment. Because of this, for example, a general pillow wrapping film or a dual-purpose wrapping using a film having excessive frictional resistance such as a thin and self-adhesive film such as a stretch shrink film can be obtained. 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, and the installation space can be reduced, and the space efficiency can be improved.

In the film bag making apparatus according to the third aspect, the first contact edge of the anti-adhesion member provided at the base end of the film entry side with the film has an R shape, so that the above-mentioned frictional resistance is excessive. Even when a suitable film is used, it is possible to achieve a good bag-making by smoothly introducing the film into the bag-making apparatus.

[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-sticking material F film

Claims (3)

[Claims] 1. A film bag making apparatus for forming a band-shaped film (F) into a cylindrical shape in a feeding process, wherein at least a portion where the film (F) comes in contact with and passes through, an anti-adhesive treatment of the film. A film bag making apparatus in a horizontal bag making and filling machine, wherein 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. An anti-adhesion member (64) having an R-shaped first contact edge with the film (F) is provided at a base end of the film bagging apparatus on the film entry side.
A film bag making apparatus in the horizontal bag making and filling machine described in the above.