JPS5844525B2 - Automatic film forming filling packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applied to an automatic film forming, filling and packaging machine, and more specifically, products such as confectionery and processed foods, which are fed from the product conveying section, are processed into a cylindrical shape from a sheet-like film. The present invention relates to a filling and packaging machine that fills a film formed in a cylindrical film and then seals the cylindrical film into a bag formed into a columnar shape.

Conventionally, this type of packaging machine includes what are generally called vertical and horizontal pillow packaging machines, and the cylindrical film F1 formed by each of these packaging machines has two sides for sealing, as shown in Figure 9A. The edges f and f are doubly joined to each other with the edges protruding outward (downward in the figure).

Also, like the opening in the figure, both side edges f. A form in which f is overlapped twice inside and outside along the cylindrical cross section.

There are two types, and the important issue is how to smoothly feed any cylindrical film F1.

However, in contrast to case A, when using the cylindrical film F1, the sealing edge does not protrude from the outer periphery. The center seal is subject to various restrictions.

For this reason, as is well known in the art, a vertical pillow packaging machine is equipped with an elevating and lowering feeding body equipped with a center sealing means so as to be movable in a cyclical manner on the side where the cylindrical film is formed. It moves toward the forming tube and forms a center seal while bonding with the film, and then descends while holding the cylindrical film from the outside like the mouth mentioned above to feed a predetermined amount. It has become.

However, since it operates intermittently over many minutes, continuous operation of the machine is impossible, and performance cannot be improved.

In addition, the horizontal pillow packaging machine is equipped with a pair (two) of left and right feeding conveyors on the feeding side of the cylindrical film.
These two conveyors continuously feed the cylindrical film having the above-mentioned spout by sandwiching it from two positions on the outside, and at the same time form a center seal of the film.

However, it is extremely difficult for both conveyors to hold the film reliably and to operate in synchronization with each other without causing deformation of the cylindrical film or damage to the products inside the film. This tends to cause poor feeding of the cylindrical film and the accompanying poor sealing, making it impossible to increase the continuous operation speed of the machine.

Another major problem was that the entire aircraft was larger than necessary.

The present invention has been made in order to solve the various drawbacks of the conventional packaging machines described above, and its purpose is to feed and center a cylindrical film in which both side edges for sealing are overlapped inside and out. To provide an automatic film-forming-filling-packaging machine that is fully adaptable to high-speed continuous operation of the machine and can fill and package products correctly and efficiently by dealing with important problems related to sealing with skillful technical means. It is something.

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

In the horizontal filling and packaging machine of the illustrated example, in the product transport section, the product W placed in a predetermined position in the transport path 2 of the transport table 1 is
However, each time a feeding device (not shown) that is continuously operated from the drive unit side of the machine is operated, the attachment 4 at the tip of the rod 3 is used to move the feeding unit forward in the conveying path 2 while being pushed forward by the attachment 4 at the tip of the rod 3. It is designed to be fed into a predetermined position.

In addition, when introducing the product mechanically, a supply conveyor (not shown) that is continuously operated in synchronization with the low-speed and high-speed operating conditions of the above-mentioned feeding device (one that is supplied at predetermined intervals (pitch)) is used. shall be.

In the film supply section, a sheet-like film F of a predetermined width, which is fed out from the roll-shaped film body RF, is continuously fed toward the bag-making section by a film feeding operation of the feeding section, which will be described later.

In the bag-making section, a bag-making device 5 is replaceably installed at a position where the product W and the sheet-like film F are fed and aligned with each other.

This bag making device 5 includes a rectangular cylindrical forming outer cylinder 6 having triangular folding guide plates 7, 7 on both needle sides of the artificial part, and a space within this outer cylinder 6 suitable for forming the film into a cylindrical shape. It is composed of a rectangular shaped inner cylinder 8 which is fitted into the inner cylinder 8 with a cylindrical shape.

In this bag making section, the product W is passed from the bag making machine 50 into the forming inner cylinder 8 as it is.

On the other hand, the sheet-like film F is initially folded inward by the folding guide plates 7, 7, as shown in FIG.
Then, while being fed between the two cylinders 6 and 8 as a whole, as shown in FIG. The films are formed into a rectangular cylindrical film F1 in a state in which they are stacked on top of each other in double layers, inside and outside.

After this cylindrical film F1 is sent out from the molded outer cylinder, it is moved along the outer periphery of the molded inner cylinder 8 with its overlapping edges f, f positioned on the bottom surface of the molded inner cylinder 8, as shown in FIG. will be delivered.

However, regarding the overlapping of the above-mentioned edges f, f, the right side in FIG. 6 is first folded inward, and then the left side is folded outward, so that they are overlapped with each other in double layers, inside and outside.

The bag making machine 5 described above is equipped with a center sealing device 10 for the cylindrical film F.

Regarding this device 10Vc, as shown in Fig. 3, the forming inner cylinder 8
An insulated and heat-resistant holder 12 is supported by a sliding rod 12a so as to be movable up and down on a bracket 11 attached to the lower right portion with bolts or the like, and is supported by a bolt-shaped support rod 13 and a spring. 14 and is held in an upwardly biased state.

The heating member 15 attached to this holder 12 is formed into a front opening shape using rod-like nichrome material, and the lead wires 16 and 16, one of the supporting rods 15a is directly connected to a voltage regulator 17 that can easily adjust and control the VC voltage by operating a dial, as schematically shown in FIG. Then, the welding rod part 15b in the shape of a thin round bar is appropriately elastically brought into contact with the center of the plane part of the molded inner cylinder 8 (that is, the position relative to the overlapping edges f, f), and horizontally along the lower surface part. It is formed into a shape.

In addition, regarding the lower end surface of the molded inner cylinder 8, the welded rod part 1
The uke for 5bK is called part 9.

For the above-mentioned holder 12, an electromagnetic type switching device 18 is connected to the rod 18 as shown in FIG.
a and a sliding rod 12a.

As a result, the heating member 15 together with the holder 12 is held with its welding rod part 'f5b at a pre-installation position facing away from the support part 9 before the machine starts operating (when stopped), and during operation, the heating member 15 is The portion 15b is held in the welding position where the portion 15b is in contact with the portion 9.

Reference numeral 19 denotes a seal pressing member detachably mounted in front of the heating member 15.

This member 19 may be made of a material (made of metal or synthetic resin) that is heat resistant and non-adhesive to the film.

) V- molded, and a presser guide plate 19a for the overlapping edge formed horizontally on the upper end of the molded inner cylinder 8 is applied with appropriate force (elastic force) to the middle part 9. ) is pressed uniformly.

In the feeding section, in front of the bag making machine 5, an air intake feeding conveyor 20 whose speed can be controlled is stretched.

As shown in the figure, this conveyor 20 is connected between a main roller 22 connected to the drive unit side of the machine via a transmission means 21 and two subordinate rollers 23, 23 disposed at the front and back of the upper part. An endless belt 24 having a large number of suction holes 25.degree. 25 is hung over the film, and the horizontal portion of the belt 24 is positioned at the feeding line of the cylindrical film.

This suction feeding conveyor 20 is equipped with a box-shaped intake dog 26.

This dog 26 communicates its chamber 27 with an intake drive unit (not shown) via an intake pipe 28, and has a large number of intake holes 29, 29 communicating with the chamber 27 on its upper surface in the feeding direction. is formed.

The intake dog 26 is connected to the bracket 30 by bolt-like support rods 31, 31, springs 32,
32 is held horizontally under an upward force by the belt 24, and its upper surface is elastically brought into close contact with the lower surface of the horizontal portion of the belt 24, and the horizontal portion is constantly transferred and guided. The suction hole 25 communicates with the suction hole 25.

In such a feeding section, under the continuous operation of the suction feeding conveyor 20, the communication section between the suction hole 25 of the belt 24 and the intake elongated hole 29 of the intake dog 26 is used as the suction feeding process for the cylindrical film. The cylindrical film is continuously fed while its lower surface is held by suction.

In the sealing section, an end sealing device 33 capable of variable speed control is installed in front of the adsorption/feeding conveyor 20.

As is well known, this device 35 heat-welds and seals a predetermined portion of the center-sealed cylindrical film in the width direction every time a pair of upper and lower heat-welding members 34 and 35 each having a built-in electric heater make one synchronous rotation. , each heat welded body 34°35
The welded seal part is cut by the inner cutting hand (knife and receiver are on the stand).

As a result, one pillow-like bag of the required length is formed and used as a packaged product.

In addition, in the delivery section, a delivery conveyor 36 whose speed is controlled is
is equipped with.

As is well known, this conveyor 36 has an appropriate number of rods in one group (1 The receiver made of the set 40 is arranged with seats 40 at equal intervals so as not to interfere with the heat-welded body 34 under the end seal device 33, and the packaged product P is received on the receiver seats 40 and sent out. do.

In the packaging machine of this example configured as described above, the sheet-like film F that is continuously fed from the film body RF' by the suction feeding conveyor 20FC under continuous operation of the machine is as described above. During the process of forming the bag into a cylindrical shape in which the sealing edges f and f are overlapped on the inside and outside by the bag making machine 5 and feeding the bag, the center seal is performed by the center sea y device 10.

That is, in the device 10, the heating member 15, which is heated and maintained at a temperature suitable for the properties of the film (melting temperature, wall thickness, etc.) by operating the voltage regulator 17, is switched to the switching device 18.
As shown in FIGS. 3 and 6, the unsealed cylindrical film F,
Both edges f.

While the center portion of f is being inserted and guided in a state where it is elastically and comfortably squeezed, the welding rod portion 15b of the heating member 15 is heated while elastically pressing the outer edge portion f. Parts of both edges f, f are completely melted and then melted in a continuous straight line as if drawn by the welding rod part 15b, and based on this welded seal form, an unsealed cylindrical shape is formed. A continuous center seal is made to the film.

Subsequently, the welded seal portions of both edge portions f, f are elastically inserted between the seal presser member 19 and the receiver portion 9 and guided through the presser guide plate 19a.
The material is pressed and clamped by the material, absorbs heat, and is cooled, solidified, and bonded well.

Cylindrical film F with center seal as described above
2 is successively fed to the front of the forming inner tube 8 of the bag making device 5, the feed device is operated to move the product W to a certain position in the cylindrical film F2 in front of the forming inner tube 8. will be sent to

The cylindrical film F2 containing the product W is then fed as is from the adsorption/feeding conveyor 20VC, and then the front and rear parts of the product are sequentially welded and sealed by the operation of the end sealing device 33 and then cut. is delivered as a packaged product P by a delivery conveyor 36.

Note that a part of the illustrated packaging machine may be modified as follows.

That is, in the bag making device 5, presser guide pieces for preventing the sealing edge from slipping are arranged on both the left and right sides of the receiver section 9.

Also, both the molded inner and outer cylinders 8 and 6 should be shaped like c-cylindrical cylinders.

Center seal device t 10 K Finally, heating member 15
The welded rod portion 15b is formed into a thin plate shape.

Further, the heating member 15 itself has an elastic biasing force and is of a stationary type.

Regarding the suction feeding means, the suction dog 26 is of a fully open type, and the belt 24 is formed with a suction elongated hole having a predetermined length in the feeding direction.

Of course, the packaging machine may be of a vertical type.

In this case, the product may be dropped into the container.

In this way, the packaging machine of the present invention can perform a center seal on the cylindrical film formed in the bag making section under continuous operation of the machine, and end seal the film in the sealing section while continuously feeding the film to form a packaged product. When the center seal of the cylindrical film is applied, a non-rotating center seal device installed between the bag making device and the feeding device side seals the effective sealing surface of the heating member. Therefore, since the sealing edges of the inner and outer double layers are heat-sealed, no matter what speed the film is fed, especially at high speeds, the sealing edges will remain in good condition from start to finish without being affected by the speed. Can be welded and sealed.

In such a sealing device, the heating member can be directly connected to a desired temperature regulator without going through various electrical devices, so that the desired temperature can be directly adjusted by adjusting the humidity regulator itself. It can be heated and maintained at a temperature that suits the properties of various films to provide good welding and sealing.

In particular, the heating member can have a small heat capacity compared to the conventional roller-type bar set with a built-in heater, so heating and humidity control can be performed more accurately in a relatively short period of time, and the amount of heating can be controlled at the sealing edge. Since the seal can be effectively welded and sealed with a small amount of electric power by directly acting on the parts, management and maintenance are easy and maintenance costs can be reduced.

In addition, regarding the above-mentioned heating member, by repeatedly hitting the switching member that is operated in synchronization with the start and stop of the machine operation, that is, the start and stop of the sealing operation (packaging operation), the heating member is moved to the sealing edge. Switching between the abutting seal position and the remote resting position can be performed accurately and appropriately set in response to seal operating conditions, ie, during normal continuous sealing and when stopping and restarting in the unlikely event of an unexpected situation.

Therefore, in both high-speed and low-speed sealing operations, sealing delays and excessive sealing can be avoided and accurate sealing can be achieved.

Furthermore, the timing for switching ON and OFF the heating power source for the heating member does not need to be specially and strictly related to the above-mentioned seal operation, and the heating member is kept in a humidified state in advance at the rest position or is set in a heat cut-off state. Furthermore, since the heating member has a small heat capacity, it is also possible to set the heating member aside while the power is turned on.

In such a filling packaging machine, when feeding the film, the suction feeding conveyor of the feeding device, which is operated in synchronization with the operation of the machine, continuously sucks and holds the center-sealed cylindrical film as described above. When feeding cylindrical films, the suction section of the linear feed section feeds the film by suction, and after the end of the feed, the film is quickly peeled off while releasing the suction holding force from the direct feeding section. Since the film can be fed out at high speed, the film can be fed smoothly without causing feeding defects such as delays or unevenness even when the film is being fed quickly.

In particular, since the suction feeding conveyor suctions and holds the bottom surface of the cylindrical film and feeds it, it can correctly feed the cylindrical film without deforming the cylindrical film or damaging the product.

Therefore, it is possible to feed the film satisfactorily with one such device, and it is possible to eliminate the need for various feeding means and guide means, which are specially constructed for the cylindrical film.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic front view showing the packaging machine of this embodiment, Fig. 2 is a plan view thereof, and Fig. 3 is a center seal portion for a cylindrical film and a 4, 5, 6, 7, and 8 are partially cutaway front views showing the feeding section, taken along lines IV-IV, V-V, and V-V in FIG. 1, respectively.
Each cross-sectional view based on the VI-VI line, ■-■ line, and ■-■ line,
FIG. 9A is an explanatory diagram illustrating two types of cylindrical films. 1...Transfer platform, 4...Attachment,
5... Bag making machine, 9... Receiving section, 10...
... Center seal device, 15 ... Heating member, 17 ... Voltage regulator, 18 ... Switching device, 19 ... Curl pressing member, 20...
...Adsorption feeding conveyor, 24...Heald,
25... Suction hole, 26... Intake dog, 29... Intake elongated hole, 33... End seal device, 36... Delivery Conveyor, E...
...Power source, W...Product, F...Sheet film, F2...Tubular film.

Claims (1)

[Claims] 1. A bag-making machine that forms a sealing edge by aligning both side edges of a sheet-like film twice, inside and outside, and continuously forms the film into a cylindrical shape, and a bag-making machine that is installed in the middle of feeding such a cylindrical film and a feeding device that feeds the center-sealed cylindrical film toward the end-sealing device. is installed on the outside of the sealing edge so as to be switchable between a contact position and a separated position with respect to the sealing edge, and the bag making machine has a slug receiving part facing the heating member. Further, the heating member is provided with a welding rod part attached along the sealing edge part for pinching the sealing edge part and sealing the sealing edge part in a drawn shape. In the feeding device, an intake dock having an intake hole that communicates with the suction holes of the belt is provided in a linear portion of the porous belt of the suction feeding conveyor which is operated as appropriate. An automatic film forming, filling and packaging machine characterized in that an adsorption section formed in a dark state communicating with a hole is set along the feeding direction of a cylindrical film.