JPH0479883B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is designed to be able to display a product such as a food product in a well-shaped manner on a store front or on a display shelf with a flat bottom. It belongs to the field of manufacturing technology for self-supporting bags.

<Summary of the gist> The invention of this application folds a belt-like film-like sheet material by a former and lowers it, and then vertically seals the vertical sides of both end edges using a vertical sealing device. to form a cylindrical shape, and further,
Its lower end is laterally sealed by a lateral sealing device, the bottom is made flat by a pawl of a gusset device, and the film-like sheet material extending from the former is inserted into a delivery cylinder via a hopper. The product is loaded into the sheet material whose bottom is horizontally sealed, and in this state, the horizontal sealing device seals the film-like sheet material horizontally at the top and seals the sheet to form the next bag. This invention relates to an apparatus for manufacturing a self-supporting bag in which the lower part of the material is laterally sealed and at the same time the upper part of the horizontally sealed part is cut using a cutter built into the lateral sealing device. The bottom paper, which has a very small size similar to the cross-sectional shape of the delivery cylinder, is fed between the delivery cylinder and the hopper by a feeding device, and the bottom paper is transferred into the delivery cylinder by a pusher. This invention relates to an apparatus for manufacturing a self-supporting bag, in which a bottom paper is placed inside a film-like sheet material that is pressed into the bag and sealed at the bottom.

<Prior art> As is well known, in recent years, a wide variety of products, especially food products, have become available on the distribution market, but it is necessary to make these products inexpensive, hygienic, and stable on the market. The fact that food can be distributed as such is largely due to improvements in not only food manufacturing technology but also packaging technology.

Therefore, as a means of compactly packaging products such as foods, there is a mode in which a bag is formed from a film-like sheet material made of resin such as vinyl chloride, and the contents such as food are filled inside the bag. has traditionally been widely used.

The seed bag is made by continuously forming a film-like sheet material into a cylindrical shape along the outer surface of the cylinder that is fed downward from the former, and at the same time, both circumferential edges of the film-like sheet material are formed into a cylindrical shape. The vertical sealing device vertically seals the film sheet material, and then the lower part of the cylindrical film sheet material is horizontally sealed by the horizontal sealing device, and in this state, the contents are delivered into the delivery cylinder through the upper hopper. After filling the inside of the film-like sheet material with the contents, the film-like sheet material is sealed horizontally at the top and at the same time, the horizontally sealed portion is cut. was formed.

In recent years, various so-called self-supporting bags, such as gazette type bags, have been manufactured in which the bottom surface of the bag is flat so that the bag can be placed in a good posture on a store shelf or on a display shelf.

<Problems to be Solved by the Invention> However, conventional self-standing bags have a case-type bag structure in which the lower end of a film-like sheet material is simply molded so that the bottom surface of the bag is flat. If the weight or bulk of the product is large, the balance may easily be lost, and the shape of the bottom may be easily deformed due to handling during transportation. There was a problem that it sometimes disappeared.

Therefore, by inserting and setting a bottom paper formed of cardboard or the like into the inner bottom of the bag to give it rigidity, and filling the bag with the contents in this state, the posture of the entire bag can be changed. It is known to those skilled in the art that it becomes difficult to collapse and deformation of the bottom part, etc.
Until now, this work had been done manually, resulting in poor work efficiency.Therefore, we proposed a technology that would allow automation to be incorporated into the continuous manufacturing process, instead of manually inserting the seed bottom paper. It is strongly desired to appear.

<Purpose of the Invention> The purpose of the invention of this application is to solve the problems of manufacturing self-standing bags based on the above-mentioned prior art, and to solve the problem by using bottom paper as a reinforcing material to ensure that the bottom of the bag is kept flat. is automatically inserted into the bottom of the bag during the process of manufacturing bags from film-like sheet material, and the series of operations of forming the bag using the film-like sheet, inserting the bottom paper, and filling the contents are performed continuously. The purpose of the present invention is to provide an excellent self-supporting bag manufacturing device that is useful for the field of automation technology utilization in the distribution industry by improving bag manufacturing efficiency.

<Means/effects for solving the problem> In order to solve the above-mentioned object, the structure of the invention of this application, which is summarized in the above-mentioned claims, is folded and deformed along the longitudinal direction via a former. In order to shape the film-like sheet material into a cylindrical shape, a piece of cardboard for bottom paper of a very small size similar to the cross-sectional shape of the inner contour of the hollow delivery cylinder is placed near the upper opening of the delivery cylinder. A feeding device is installed to carry out the material in a flat shape, and a lifting device installed near the delivery cylinder is provided with a feeding device that can be freely inserted into the inside of the delivery cylinder and immediately before the level of the horizontal sealing device below. A pusher whose tip can be freely lowered to a level is held, and the fed film-like sheet material is folded back and deformed by a former and wound around the outer periphery of the delivery cylinder, so that it is formed into a cylindrical shape. vertically sealing both end edges of the film-like sheet material continuously using a vertical sealing device on the side of the delivery cylinder;
Further, a horizontal sealing device performs horizontal sealing on the film-like sheet material below the delivery cylinder, and there the cardboard is delivered by a cardboard feeding device, and is then fed between the delivery cylinder and the upper hopper. Then, the pusher is lowered via the lifting device to push the cardboard into the delivery cylinder, and when the bottom paper is set inside the film-like sheet material that is formed as a bottom paper and the bottom is laterally sealed, the hopper is released. A technology in which the contents are poured onto the bottom paper, and then the upper part of the film-like sheet material is horizontally sealed with a horizontal sealing device, and at the same time, half of the horizontally sealed portion is cut off with a cutter built into the horizontal sealing device. The measures taken were as follows.

<Example> Next, an example of the invention of this application will be described below based on the drawings.

1 is a self-supporting bag manufacturing device which constitutes the gist of the invention of this application, and the embodiment is as shown in FIG.
A cardboard 2 as a bottom paper forming a planar shape has its four corners cut out in advance, and as shown in FIG. This is an embodiment of manufacturing the self-supporting bag 3 shown in FIGS. 7 and 8, which is housed in the bottom part.

In Fig. 1, reference numeral 4 denotes a device frame, and a bobbin 6 of a film-like sheet material 5 is rotatably mounted on the rear side (right side in the figure) of the device frame. A film-like sheet material 5 feeding device 7 is provided.

Further, on the front side (left side in the figure) of the device frame 4, a cylindrical delivery cylinder 9 having a rectangular cross section is disposed in the upper frame 8 in the vertical direction. A former 10 is mounted on the upper part of the former 9 in the same manner as in the conventional embodiment.
0, the belts 11, 11 for feeding the film-like sheet material 5 are extended from the device frame 4 so as to be close to both opposing outer surfaces of the feeding cylinder 9, and are fed out from the bobbin 6. The film-like sheet material 5 fed out via the device 7 is transferred to the former 10 via guide rollers 12, 12...
The paper is fed to the former, folded back from the former 10 through the driving force of the delivery belts 11, 11, and delivered downward along the outer surface of the delivery cylinder 9.

The cross-sectional shape and size of the inner contour of the delivery cylinder 9 are as shown in FIG. 5, as shown in FIG. The shape and size are slightly larger by the thickness of the sheet material 5 so that the bottom paper 2 shown in FIG. 5 can be passed through the film-like sheet material 5.

Then, from the device frame 4, the vertical sealing device 1
3. The horizontal sealing device 14 at the bottom and the bag support 15 at the bottom extend through a bracket or the like, and the vertical sealing device 13 is positioned so as to face the front of the delivery cylinder 9. A film-like sheet material 5 wrapped around the delivery cylinder 9
The overlapping portions of both ends in the width direction are continuously sealed in the vertical direction, and the horizontal sealing device 1 at the bottom thereof is
4 has a built-in cutter 16 for laterally sealing the film-like sheet material 5 that has been vertically sealed and cutting it from the center of the sealed area; A completed self-supporting bag 3 cut by the cutter 16 of the horizontal sealing device 14 is placed thereon.

Further, as shown in FIG. 2, the side frames 17, 1
7 is attached with a gusset device 18, 18 well known to those skilled in the art, and a pair of claws 19, 19 move forward and backward synchronously at appropriate timings below the feed cylinder 9, thereby vertically sealing the film. The film-shaped sheet material 5 is deformed into a shape in which both sides are folded inward as shown in the cross-sectional shape shown in FIG. It is like that.

As for the upper surface of the upper frame 8, a lifting device 20 and a feeding device 21 for the cardboard 2 are installed on the front side thereof.
are installed to sandwich the upper end of the delivery cylinder 9, and the lifting device 20 has a chain 24 stretched between a drive sprocket 22 and a driven sprocket 23 driven by a motor, and the chain 24 rotates in the vertical direction. As shown in FIG.
6 and a conveyance roller 27 provided opposite to the front end thereof, the cardboard 2 is delivered one by one onto the upper surface of the upper opening of the delivery cylinder 9.

Furthermore, a guide frame 28 is installed above the delivery cylinder 9, and a plurality of guide rollers (not shown) are supported within the guide frame 28. A pusher 29 is installed inside so that it can be moved up and down.

The pusher 29 can be freely inserted into the inside of the cylindrical delivery cylinder 9, and the bottom paper 2 shown in FIG. Push it into the
It is inserted and passed through, and is set at the bottom of a cylindrical bag that is horizontally sealed below the delivery cylinder 29.

The pusher 29 is installed so that the substantially U-shaped opening faces the rear side (right side in FIG. 1),
The front side (left side) wall surface is fixedly supported by a chain 24, and the chain 24 is moved up and down by the drive sprocket 22, so that insertion into and up and down from the delivery cylinder 9 is performed.

Further, on the rear side of the guide frame 28, as shown in FIG. 1, a hopper 30 is installed on the upper frame 8 so as to be able to swing freely. Further, the hopper 30 is connected via a bracket 32 to an appropriate vibration device 31 installed on the upper frame 8 behind the hopper 30, and The hopper 30 is made to vibrate by the operation of the vibration excitation device 31.

Furthermore, a bucket conveyor device 33 is installed horizontally above the hopper 30 and the vibration device 31, and the contents of the product weighed to a preset amount by a preceding weighing device (not shown) are transferred to each bucket 34. Therefore, it is conveyed forward and thrown into the hopper 30 from the front end of the conveyor device 33.

In the above configuration, the film-like sheet material 5 is pulled out from the bobbin 6, passed through the feeding device 7, guide rollers 12, 12, . . . The sheet material 5 is the delivery belt 1
1 and 11 from the outside in a pressed state, and both end edges in the width direction are vertically sealed by a vertical sealing device 13 in an overlapping state,
Further, a large amount of cardboard 2 shaped as shown in FIG. 4 is set in the bottom paper magazine 25 of the feeding device 21.

Next, from this state, the self-supporting bag manufacturing apparatus 1 is operated, and the film-like sheet material 5 is continuously wound around the delivery cylinder 9 by the set intermittent operation of the delivery belts 11, 11, and at the same time The vertical sealing device 13 in front of the delivery cylinder 9 vertically seals the overlapping portions of the film-like sheet material 5 at both ends in the width direction.

Therefore, there, the film-like sheet material 5
is formed into a cylindrical shape with a rectangular cross section while being lowered outside the delivery cylinder 9.

Furthermore, the film-like sheet material 5 thus formed into a cylindrical shape with a rectangular cross section is transferred to a delivery cylinder 9.
At the bottom of the gusset device 18, the claws 19,1
9, the center part is folded inward to form a cross-sectional shape as shown in FIG. A horizontal seal is made at the bottom edge.

During this time, a sheet of bottom paper 2 is placed above the upper frame 8 by the operation of the feeding device 21.
A cardboard 2 is carried out and inserted between the upper opening of the delivery cylinder 9 and the hopper 30 in the flat state shown in FIG. As the chain 24 moves, the pusher 2 descends from above.
The tip of 9 pushes the cardboard 2 into the delivery cylinder 9 having a rectangular cross section.

At this time, the cardboard 2 pushed into the delivery cylinder 9 is guided by the inner wall surface of the delivery cylinder 9 and the outer wall surface of the pusher 29, and as shown in FIG. The bottom paper 2 is bent upward at a substantially right angle, and the bottom part 2' is rectangular and has a planar shape slightly smaller than the inner contour cross-sectional shape of the delivery cylinder 9, and has a similar shape. When the tip of the pusher 29 passes the lower end of the delivery cylinder 9 and reaches the level just before the level of the horizontal sealing device 14, the four sides 2'' of the cardboard 2 are left in the bent state as described above. As described above, it is set inside the film-like sheet material 5 whose lower end is sealed, and the bottom part 2' of the bottom paper 2 and the bottom part of the film-like sheet material 5 are brought into surface contact with each other.

Therefore, at this time, the lower end of the sealed film-like sheet material 5 follows the shape of the bottom 2' of the bottom paper 2 and is maintained substantially flat.

Subsequently, the pusher 29 connects the drive sprocket 22.
By the reverse movement of the chain 24 via The contents of the product are put into the hopper 30.

Then, when the contents are put into the hopper 30,
The vibration device 31 operates to vibrate the hopper 30,
The contents put into the hopper 30 are dropped into the delivery cylinder 9 without bridging or clogging in the hopper, and the bottom paper 2 is set on the lower end of the film-shaped sealed sheet material 5. Placed on top and filled.

Next, in this state, the film-like sheet material 5 is delivered to the delivery cylinder 9 by the delivery belts 11, 11.
The gusset device 18 is operated again to adjust the shape of the film-like sheet material 5 to be the same cross-sectional shape as shown in FIG. The sealing device 14 is operated and the upper part of the film-like sheet material 5 filled with the contents is horizontally sealed, and at the same time, the cutter 16 built in the horizontal sealing device 14 seals the sealing portion. The intermediate position of is cut.

Then, the cut-off lower side is completed as a self-supporting bag 3, placed on the bag support stand 15 in an upright position, and carried out by a transport device (not shown), while the upper side is made of cardboard in the same manner as described above. The setting of the bag 2 and the charging of the contents are performed successively, and the next self-supporting bag 3 is continuously produced.

Note that the embodiments of the invention of this application are of course not limited to the above-mentioned embodiments, and various other embodiments can be adopted.

<Effects of the Invention> As described above, according to the invention of this application, the bottom paper as a reinforcing material is basically a film-like material whose bottom is closed immediately before the contents are put into the bag, in order to keep the bottom surface of the bag flat. Since the bag is automatically set in the sheet material of the bag, a series of operations such as bag formation, bottom paper insertion, and filling are all performed automatically and continuously.
The effects of significantly improving manufacturing efficiency can be achieved.

That is, a bottom cardboard sheet sent out from a feeding device and having a rectangular size that is extremely small compared to the cross-sectional size of the sending cylinder is set between the sending cylinder and the hopper;
In this state, the pusher is lowered so that the bottom paper is held in a fixed position inside the delivery cylinder, pushed down, and set on the inner bottom of the film-like sheet material that is closed at the bottom. It is said that the bottom paper can be automatically and accurately set at the bottom of the bag immediately before the contents are put into the bag for film-like sheet materials that have been sealed in both the directional and lateral directions. The effect is produced.

Furthermore, if the pusher is formed to have a U-shaped cross section and the hopper is installed so as to face into the approximately U-shaped opening of the pusher, the pusher that moves up and down will not interfere with the hopper. , it is possible to fix the loading position of the contents in one place, and even if the lifting operation of the pusher and the loading operation of the contents overlap to some extent, the contents are guided by the inner wall surface of the pusher and are delivered reliably. Since the contents are dropped into the cylinder, it is possible to overlap the lifting action of the pusher and the action of putting the contents into the bag. In such a case, time loss during equipment operation is reduced and production efficiency is increased. The effect of further improvement is achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention of this application, and FIG. 1 is a side view with the side frame removed;
Figure 2 is a front view of the same, Figure 3 is an enlarged side sectional view of the main parts, Figure 4 is a developed plan view of the bottom paper, Figure 5 is a perspective view of the bottom paper, and Figure 6 is the upper part of the self-supporting bag. 7th cross-sectional view of
The figure is a perspective view of the self-supporting bag, and FIG. 8 is a longitudinal sectional view of the self-supporting bag. 5... Film-like sheet material, 10... Former, 9... Delivery cylinder, 30... Hopper,
13...Vertical sealing device, 16...Cutter, 14
... horizontal sealing device, 1 ... self-supporting bag manufacturing device,
2'...bottom, 2...cardboard, 21...feeding device,
29... pusher, 19... claw, 18... gusset device.

Claims (1)

[Scope of Claims] 1. A delivery cylinder for inserting contents and for forming a cylindrical bag is extended inside a former that folds and deforms a belt-shaped sheet material along the longitudinal direction, and an opening of the delivery cylinder is provided. A hopper for charging the contents faces the cylinder, and a vertical sealing device for sealing both ends of the film-like sheet material is provided on the side of the delivery cylinder. In a self-supporting bag manufacturing apparatus that is equipped with a horizontal sealing device having a cutter for cutting the material and a gusseting device having claws for forming a center fold for the film-like sheet material, the inner side of the delivery cylinder is provided. A feeding device for conveying a cardboard for bottom paper having a bottom portion with a similar cross section and a size slightly smaller than the cross-sectional shape of the outline in a plane position between the feeding cylinder and the above-mentioned hopper is located near the opening of the feeding cylinder. A self-supporting device characterized in that a pusher whose tip can be raised and lowered from inside the delivery cylinder to a level just before the level of the horizontal sealing device is held by a lifting device provided near the delivery cylinder. Bag manufacturing equipment. 2 The pusher is formed into a substantially U-shaped cross section,
2. The self-supporting bag manufacturing apparatus according to claim 1, wherein the hopper is installed so as to face a substantially U-shaped opening of the pusher.