JPS5834324B2 - Film bag making and filling packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film bag-filling-sealing machine, and more specifically, it is applicable to a film bag-filling packaging machine, and more specifically, to a film bag-filling and packaging machine, which is applicable to products such as food products or pharmaceuticals that are in a fluid, powder, or clay-like state and are supplied from a product supply section. Alternatively, the present invention relates to a film bag-forming-filling-sealing machine that fills raw materials into a cylindrical film and then seals and packages the raw materials in a columnar bag.

Conventionally, in this type of packaging machine, which is also generally called a pillow packaging machine, in the film feeding process, a sheet-like film is folded to form a cylindrical film. After sealing the joint-sealing edge formed by the process, the end seal of the cylindrical film is formed to form a pillow-shaped bag F4 illustrated in FIG. 9C, and the product is sealed.

However, in such a pillow-shaped bag F4, the center seal part, that is, the spine sticking part f', which should also serve as the backbone of the bag itself, is formed by sealing both side edges of the sheet-like film even when subdivided, and there is only one place. For this reason, it is not considered a strong and durable carrying bag.

In addition, since each sealed portion is generally bonded to each other by heating, the bonding is not very strong, and the weight of the product inside the bag tends to act intensively on the backing portion f'. In particular, the back attachment part f'+41J separation tends to occur, resulting in a bag with holes.

For this reason, with conventional packaging machines, relatively light (small mass) confectionery etc. can be packaged with the above-mentioned pillow-shaped bag F4 without any problem, but fluid, powdery or muddy (clay-like) etc. For products with relatively large mass (e.g. fresh cream, powdered coffee, fresh miso, etc.),
It is considered extremely difficult to package the pillow-shaped bag in a well-sealed manner as described above, and it is also considered unsuitable for products that require thermal processing such as heating or freezing after packaging. It is excluded from packaging.

Furthermore, since the spine part f' is formed along the longitudinal direction of the center of one surface of the pillow-shaped bag F4, there is a drawback that it not only spoils the appearance of the scale but also makes it difficult to print and display.

The present invention has been made in order to solve the above-mentioned drawbacks of conventional packaging, and the seal edge that becomes the spine is formed by forming a rib-shaped seal edge that protrudes outward from the corner of a package with a rectangular cross section. To provide a film bag making, filling and wrapping machine which efficiently packs articles in a sturdy rectangular blunt body which does not cause mold part deformation and which does not have a backing part. .

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In this example, a vertical filling and packaging machine is illustrated, and the outer edge of each corner of the film that is formed from a sheet shape into a rectangular tube shape is sealed to produce a rectangular columnar bag F4 as shown in FIG. This shows the case where the product is molded and sealed.

The packaging machine of this embodiment generally includes a supply guide member 2 vertically installed in the center of a machine frame 1 for guiding product fall, and a supply guide member 2 installed above the member 2, that is, at a mutually feeding and aligning portion of the product and the sheet-like film. , a bag making device 8 detachably attached to a part of the machine frame 1
a film feeding device 14 installed in the middle of the supply guide member 2; a film forming guide device 21 located below the device 14 and installed in the lower part of the supply guide member 2; It includes a side seal device 31 and an end seal device 57 installed at the lower end of the supply guide member 2, and these are configured as follows in view of the formation of a rectangular tube film.

First, in the supply guide member 2, a guide receiver formed in a cylinder shape along the outer peripheral surface of the sheet film F in the axial direction also serves as a member, and in this example, the upper first supply cylinder 3, The second supply cylinder 4 at the lower stage is connected to each other on the same vertical line in a detachable and replaceable manner.

The first supply cylinder 3 has a cylindrical shape, and its upper end is connected to a product supply device (not shown) as appropriate.

On the other hand, the second supply cylinder 4 is formed into a rectangular cylinder shape from the upper end to the center of the cylinder, and its upper end is fitted into and communicates with the lower end of the first supply cylinder 3. , and the lower end of the molded cylinder part 4B, which extends continuously downward from the squeeze cylinder part 4A and is formed into a rectangular cylinder shape with a rectangular cross section,
It faces an end seal device 57, which will be described later.

As shown in FIGS. 1 and 4, bending guide protrusions 5, 5 are provided on the open side edges of the second supply tube 4 at three locations from the squeeze tube section 4A to the upper part of the forming tube section 4B. It is formed along the direction.

In the process of gradually forming the cylindrical film E into a rectangular tube shape, each of the protrusions 5 is formed on the same side edge of the film.
A folded sealing edge f1, which is different from the double bonded sealing edge f consisting of both side edges of a sheet-like film, is formed by bending while creating a crease.

Note that the front, rear, left and right flat outer surfaces of the molded cylinder portion 4A are referred to as guide surfaces 6 and 7.

If the product is in a fluid state, a feed tube (not shown) connected to the product supply device may be inserted into the supply guide member 2.

The bag-making device 8 is configured to form and guide the sheet-like film F, which is fed out from the film supply section side at each pitch, into a cylindrical shape while folding both sides of the film F into a cylindrical shape, similar to the conventional one. As shown in FIGS. 1 and 3, the supply guide member 2 is fitted onto the upper outer periphery of the first supply cylinder 3 at a distance suitable for film folding guide, and is fitted with a C-shaped flange 10 and bolts. A folding guide plate 11 formed in the shape of a conical skirt is attached to the outer periphery of the molded cylinder 9 mounted on the machine frame 1 side, and a part of the outer periphery is removed from the upper opening end of the molded cylinder 9. It is attached by winding it along the opening 12.

This folding opening 12 has a negative side edge 12a formed in an oblique (spiral) shape, and the other side edge 12b parallel to the axial direction, so that the folding opening 12 has an overall shape of 3, and the flange 10
From the opening part to the lower end of the opening of the molded cylinder 9, both side edges 1
2a and 12b are made parallel to each other to form a guide groove 13 for the sealing edge f of the film.

However, in view of forming a rectangular tube film with a rectangular cross section, the guide groove 13 is located at the front left side (within the third quadrant in the figure) as shown in FIG.

The film feeding device 14 includes the feeding guide member 2
A pair of belt conveyors 15, 15 each having a common drive motor (not shown) as a common drive unit are arranged vertically and facing each other on both sides of the conveyor belt.

Both conveyors 15, 15 are arranged on the upper side of the second supply cylinder 4, and are connected to the drive motor side by a transmission means (only the shaft is shown).

) The tension side portion of the belt 18, which is hung between the main roller 16 connected via It is pressed elastically against the side surface as appropriate.

In such a device 14, the cylindrical film F1 on the outer periphery of the supply guide member 2 is moved by synchronized intermittent operation of both conveyors 15 and 15 by driving the drive motor at predetermined time intervals as the machine is operated.
are held by each other's belts 18, 18 and fed intermittently at each pitch.

The film forming guide device 21 and the side seal device 31 are removably assembled together in one holding frame 19 that is removably attached to the machine frame 1 via a support rod 20. There is.

The molding guide device 21 is removably equipped with first and second molding mechanisms 22 and 25 corresponding to the molding cylinder part 4B in the supply guide section 2. First, regarding the first molding mechanism 22, the holding frame Each shaft rod 2 connected horizontally between the 19 side plates
Rubber forming rollers 24, 24 for guiding film squeezing are fitted and supported on 3.23 so as to freely rotate.

These rollers 24, 24 are located at the lower end of each bending guide protrusion 5 of the supply guide member 2, and the outer peripheral surface of the rollers 24, 24 is set so that the front and rear guide tubes of the forming cylinder portion 4B are flat as shown in FIG. 6.6 and each of the bending guide protrusions 5 and 5 are brought into proper elastic contact, and the cylindrical film is pinched and guided gradually to form a rectangular tube along the outer periphery of the formed tube portion 4B. It is designed to be formed into a shaped film F.

On the other hand, in the second forming machine 25, two forming rollers for forming film creases are arranged on both the left and right sides of the forming cylinder section 4B.

All of the forming roller sections have the same structure as shown in FIG. 5, and for convenience, the left side will be explained.
A main molding roller 27 made of metal is mounted on a rotating shaft 26 that is inserted and supported via a bearing or the like between the rear part of the main body 9 and each of the front and rear support rods 28, 28 fixed to the inside of the holding frame 19. It is attached.

On the other hand, at the inner ends of each of the support rods 28, 2B, a pair of front and rear forming follower rollers 29, 29 made of small diameter rubber are supported so as to be freely rotatable.

The main roller 27 has a side guide receiver of the forming cylinder portion 4B on the surface 7,
Further, the respective follower rollers 29, 29 are appropriately rolled into contact with the front and rear guide surfaces 6, 6, respectively, and are arranged at intervals that match the respective sealing edges as shown.

The rotating shafts 26 are connected to a common drive unit (not shown) via transmission means 30, 30, and rotated in synchronism at a slightly higher speed than the feeding device 14.

In the second forming mechanism 25, the rectangular cylindrical film from the first forming mechanism 22 is sandwiched between the forming cylinder section 4B and each forming roller section by synchronized high-speed rotation of the forming roller sections on both sides. While guiding, each of the sealing edges f and fl described above
The entire rectangular tubular film F2', which is formed with precision, is appropriately stretched and stably held while being fed and guided.

Note that the joint sealing edge f is sandwiched and guided between the forming main roller 27 on the left side in FIG. 5 and the forming subordinate roller 29 on the front side.

On the other hand, the side seal device 31 includes the molded cylinder portion 4B.
A heating seal mechanism 32 and a seal cooling mechanism 45 are provided correspondingly.
and are detachable.

First, regarding the heat sealing machine groove 32, the forming cylinder portion 4B
Two heat bonding units are arranged on the left and right sides of the unit.For convenience, the left side will be explained based on FIG. The welded part containing the electric heater 35 is attached to the base 34 via a heat insulating material, etc., and the side guide receiver of the molded cylinder part 4B is attached to the surface 7.
is facing.

Further, on the front and rear edges of the bracket 33, open/close levers 36 and 36 in the shape of a flat angle are supported by pins 37, with springs 41 interlocked with each other.
A built-in heating element 38 is attached via a heat insulating material or the like, and a trochanter 40 is attached to the other end.

Both levers 36, 36 are connected to a conical piece at the tip of a piston rod 43 in an operating cylinder 42 for an air set, which is set to be operated under switching control in accordance with the film pitch feeding operation and rest of the feeding device 14. 44, through the trochanters 40, 40 and springs 41, it is held in the closed state shown by the solid line in the sealed state and in the unsealed state shown in the phantom line in the expanded state.

In such a heat sealing mechanism 32, each sealing edge f, f1 of the prismatic cylindrical film F2' from the second forming mechanism 25 is welded under the sealing state of the heat welded parts on both sides. The heating elements 3B and 3 are heated while being preheated and kept warm on the table 34.
8 and forms a heat-welded seal during feeding guidance to form a rectangular tube film F3, and when the feeding device 14 is stopped, both heat-welded parts are temporarily returned to the state before sealing. .

Note that the welded portion of the above-mentioned joining seal edge f' on the left side in FIG. 6 is welded and sealed between the table 34 and the front heating element 38.

On the other hand, the seal cooling mechanism 45 is structurally exactly the same as the second forming mechanism 25 of the true shape guide device 21, and as shown in FIG. In the compression cooling section, the main roller 4 on the rotating shaft 46
7, and follower rollers 49, 4 before and after each support rod 48° 48
9, the respective sealing edges f' and f'1 of the rectangular tube film F3 from the heating sealing mechanism 32 are suitably crimped, and the film is cooled while absorbing heat during feeding and guiding to solidify and adhesively seal. It looks like this.

However, in this mechanism 45, the two rotating shafts 46, 46 connected to the drive unit (not shown) via the transmission means 50, 50 (see FIGS. 2 and 6) are connected to the second forming mechanism. By being set to rotate synchronously at a slightly higher speed with respect to the 25 side, it is possible to cool the crimp seal while appropriately stretching each seal edge f', ff.

The outer periphery of each of the forming main rollers 2T and the main roller 47 is treated with anti-slip processing such as a row left.

Reference numeral 51 denotes an ear clipping device installed below the side seal device 31.

This device 51 includes a bearing holder 52 attached to the machine frame 1.
At a fixed position between a rotary blade 55 at the inner end of a rotary shaft 53 supported by a drive unit (not shown) and connected via a transmission means 54 as appropriate, and a rotary receiver opposing this, a ring 56, Cutting off an excess outer edge of the joint seal edge f' of the side-sealed rectangular tube film F;
ing.

Note that this device 51 may be configured to rotate intermittently or continuously in accordance with the pitch feed of the film.

The end sealing device 57 can be installed vertically, and the left and right pair of heat welding bodies 58, 58, each of which has a built-in electric heater, can be moved open and closed in accordance with the film pitch feed, as in the past. When the image attachment members 58, 58 are closed and at rest, a predetermined portion of the rectangular tube film F3 is sandwiched and sealed by heat welding, and the film is cut with a knife 59 to form a pillow-like bag F4 to produce a packaged product.

In the vertical filling and packaging machine of this example configured as described above, in the process of feeding the sheet-like film F for each pitch by the film pitch feeding operation of the feeding device 14, the side seals are applied to the film formed in a cylindrical shape. , one end seal and cut, filling of the product, and the other end seal and cut are performed sequentially to seal and package the product W in the pillow-shaped bag F4. One packaging operation will be explained.

That is, the pitch-fed sheet-like film F is first folded by the folding guide plate 11 of the bag making machine 8 while being inserted between the forming cylinder 9 and the first supply cylinder 3 of the supply guide member 2. A cylindrical film F1 is formed along the outer periphery of the first supply cylinder 3 as shown in FIG. You will be guided along the route.

Then, in the process of being transferred from the first supply tube 3 to the squeeze tube section 4A of the second supply tube 4 and then to the forming tube section 4B, the film F1 is gradually squeezed into a rectangular tube shape, and then passed through each bending guide. A rectangular cylindrical film F with a bent seal peripheral edge fltfl on three same side edges as shown in FIG.
is formed into.

Then, while the film F2 is being fed to the outer periphery of the forming cylinder portion 4B, the film F2 is first transferred to the forming guide device 21 as shown in FIG.
The image forming rollers 24° 24 of the forming mechanism 22 align the guides of the forming cylinder portion 4B along the surfaces 6, 6, and then the main forming rollers 27° of the forming roller portions on both sides of the second forming mechanism 25 in FIG. 27 along the guide surfaces 1 and 7, the film F2 is formed into a stable rectangular tube shape with creases on all the same side edges as shown in FIG. The sealing edges f and f1 described above are held between the rollers 27 and 29 and guided to the next side sealing device 31 while being held in the normal position.

Subsequently, the above-mentioned rectangular tubular film F' is attached to each of the eight sealing portions f and fl in the side sealing device 31.
First, each welding part in the heating welding parts on both sides of the heating sealing mechanism 32 shown in FIG.
The side seal is formed by heating and welding.

Next, such a rectangular tube film F3 is attached to each seal edge f',
F'1 is pressed and clamped between rollers 47 and 49 between the pressure cooling portions on both sides of the seal cooling mechanism 45 shown in FIG. 7, and is cooled by heat absorption while being stretched appropriately (see FIG. 8C).

The rectangular tube film F3 is then processed to have its joint seal edge f rounded by a rounding device 51.

Then, during a pause at the end of pitch feeding, a predetermined portion thereof is end-sealed and cut by the end-sealing device 57.

At the same time, the product W supplied in quantity from the product supply device side is dropped into the supply guide member 2 and filled from the lower end of the forming cylinder part 4B into the end-sealed rectangular tube film F3 at one end. Injected.

It should be noted that the product W at this point is once received over both the heat-welded bodies 58, 58 which are still in the closed state and the outlet portion in the molding cylinder portion 4B.

Thereafter, the next pitch feeding operation is performed by the feeding device 14 in synchronization with the opening movement of both the heat-welded bodies 58, 58 of the end seal device 57, so that the films other than the next one are While the rectangular tube film F3 is formed during the feeding guide along the supply guide member 2 as shown in FIG.
The other predetermined portion of No. 3 is again end-sealed and cut by the end-sealing device 57.

As a result, the bag made of the rectangular tube film corresponding to the preceding pitch is reinforced with seal edges f' and f'1 formed on each open side edge, which are weak and easy to tear, as illustrated in FIG. 9A. It is formed into a strong prismatic columnar bag F4, and the product can be sealed and packaged within the bag.

In the packaging machine of the present example, which is capable of sealingly packaging the product W in the strong and durable pillow-shaped bag F4, a square tube is installed along the second supply tube 4 of the supply guide member 2 for the side seal for the film. While the formed film is being formed and held into a more accurate rectangular cylinder shape by the forming guide device 21, especially by the second forming mechanism 25, the heat sealing mechanism 32. of the side sealing device 31 is used. Since the film forms a seal, accurate and good sealing can be achieved while stably holding the film without causing deformation of the film or misalignment of the sealing edges f, f.

In particular, before sealing in this heat sealing mechanism 32,
By switching control operation of each operation cylinder 42 in the heat welding parts on both sides, the heating body 38.38 is moved to the forming cylinder part 4B.
Since the cylindrical portion 4B and, in turn, the film can be largely evacuated, it is possible to eliminate the adverse effects of excessive heating on the cylindrical portion 4B and, in turn, on the film, and it is not necessary to turn ON and OFF the power to the electric heater 39 in each heating element 38, so that the temperature is always maintained at a constant temperature. It can be continuously heated and maintained, eliminating sealing failures due to insufficient temperature.

In addition to the sealing by the heat sealing mechanism 32, the seal cooling mechanism 45 actively compresses and cools the seal edges f' and f'1, so that the seals are solidified and bonded more firmly and quickly, resulting in a good seal. This allows a stronger pillow-like bag to be formed.

In particular, according to such a seal cooling means, there is no need for any cooling/drying equipment or equipment that would be particularly costly in the film feeding process, and there is no need to consider the cooling/drying process or route.
By allowing the end seal device 57 to be placed close to each other, the entire machine can be made as compact as possible.

In addition, the second forming mechanism 25 and the seal cooling mechanism 45 are set to operate at slightly higher speeds in sequence compared to the belt conveyor 15 of the feeding device 14. In particular, each of the sealing edges f, f and the sealing edges f', f'1 can be stretched and accurately formed without wrinkles, etc., and can be sealed neatly, resulting in a long package with an attractive appearance. A bag for use can be formed.

Moreover, in the copying machine of this example, by arranging the end seal device 57 and the second supply cylinder 4 of the supply guide member 2 at close intervals, a box-shaped packaging bag F' as shown in the opening in FIG. 4
It can also be molded and filled with products.

Further, the forming guide device 21 and the side seal device 31 are
Since both are incorporated into one holding frame 19, the entire barrel device 21, 31 can be easily attached to a predetermined position in the film feeding process.
Since the mechanisms 22, 25, and 32, 45 are assembled in a detachable and replaceable manner, these mechanisms, the second supply tube 4, and the bag making device 8 described above can be of any desired type and shape (structure). Alternatively, products can be packaged by forming a pillow-like bag made of a cylindrical film other than a rectangular cylinder, such as a cylinder or a semi-cylindrical shape, with a plurality of sealing edges formed on the outer edge. is also possible.

Note that a part of the weeping machine of this example may be modified as follows.

CI) Forming the supply guide member 2 into a single cylindrical member into a desired shape to match the film.

Further, the molding cylinder part 4B of the member is separated and installed as an independent molding cylinder member on the product and film feeding line so that it can be attached and replaced.

CI) Combining both mechanisms 22.25 of the forming guide device 21 into one.

Further, the device 21 is separated from the side seal device 31 by a support member different from the side seal device 31, and arranged independently before and after the feeding device 14.

Also, a guide plate type should be used instead of a roller type.

[■] The heating sealing mechanism 32 of the side sealing device 31 is of a roller type.

In addition, the supply guide member 2, the bag making machine 8,
It is also possible to arrange the forming guide device 21 and the side seal device 31 horizontally to make the machine itself horizontal.

In this case, for example, a cylinder-type or crank-type product supply device or a supply pipe is used to fill the product into a predetermined position in the cylindrical film in front of the outlet of the supply guide member 2. In this case, the means may be disposed in contact with the lower outer side of the cylindrical film.

Now, in the present invention, in order to form a cylindrical film of a desired shape by folding a sheet-like film and bringing both side edges together to form a cylindrical film of a desired shape, The joining seal edge of the cylindrical film is placed along one corner of the cylindrical film, the cylindrical film is formed into a desired shape at the three corners, and the bending seal edge is a squeezer having a bending guide protrusion. A section is provided and the cylindrical film is squeezed into a shape that roughly follows the circumferential surface of the constriction section to form an edge for a folded seal, and the cylindrical film having the desired shape is joined in front of the end sealing device. The structure is such that a side seal device is provided for heat-bonding the sealing edge and the folded sealing edge.

Therefore, according to the present packaging machine, in the squeeze tube part, the joining seal edge of the tubular film is combined with the bent seal edges formed at the three corners of the rectangular tubular film, as well as the reinforcing seal edge of the rectangular tubular film. This makes it possible to form a sturdy and durable bag, so it is possible to form a bag that is solid and durable.
It is possible to efficiently fill and package products with a large mass such as clay-like or fluid products, and also to transport such packaged products.
Storage, etc. can be done easily and safely.

Further, even if this packaged product is later subjected to thermal processing or treatment such as heating or freezing, the product can be kept sealed while avoiding damage to the bag.

In addition, since the joint sealing edge of the cylindrical film constitutes the sealing edge of one corner of the elongated cylindrical film, there is no spine affixing part on the surface of the bag. The effects are extremely impressive, such as being able to easily print on the surface of the screen.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view of the road body showing the product supply device in the packaging machine of this embodiment, Fig. 2 is a side view, and Figs. Figures 6 and 7 are the ■-■ line, IV-IV line, V-V line, and V line in Figure 1, respectively.
Each cross-sectional view based on the I-VI line and the ■-■ line, FIG. , C are explanatory views showing comparative examples of various bags. 1... Machine frame, 2... Supply guide member, 3... First supply tube, 4... Second supply tube, 4B.・・Forming cylinder part, 8・
... Bag making machine, 13 ... Guide groove, 14 ... Feeding device, 15 ... Belt conveyor, 19 ... Holding frame, 2
1... Forming guide device, 22... First forming mechanism, 24
... Forming roller, 25... Second forming mechanism, 27...
- Molding main roller, 29... Molding follower roller, 31...
side sealing device, 32... heating sealing mechanism, 34...
... Welding receiver is a stand, 36... Opening/closing lever, 38... Heating body, 42... Operating cylinder, 45... Seal cooling mechanism, 47... Main roller, 49... Follow roller, 5
1... Ear removing device, 55... Rotating blade, 57... End sealing device, F3... Square tube film, F4°f'
4...Pillow-shaped bag, W...Product, f', f'1...Seal edge.

Claims (1)

[Claims] 1. A supply tube is installed in order to form a cylindrical film of the desired shape by folding the sheet-like film and bringing both side edges together to form an edge for joining and sealing. The joining sealing edge of the cylindrical film is aligned, the cylindrical film is formed into a desired shape at the three corners, and the bending sealing edge is provided with a squeeze part having a bending guide protrusion. A cylindrical film is squeezed into a shape that roughly follows the entire circumference of the same constriction part to form a bent sealing edge, and in front of the end sealing device, a joining sealing edge of the cylindrical film having the desired shape is formed. and a film bag-forming-filling-sealing machine characterized by being provided with a side sealing device for heat-bonding edges for folding seals.