JPH0632305A - Method and device for making and filling bag - Google Patents

Abstract

PURPOSE:To obtain a method of and a device for making a bag made of a polyethylene film and the like and filling the bag with articles in each fixed quantity in a supermarket and the like. CONSTITUTION:The title device is so designed that a sheet material 8, such as a polyethylene film, and a pair of chuck tapes 6'' in an engageable state are fed to a former 9 connected to a weight measuring device and that, while making a bag by vertical sealing and lateral sealing, it is filled with articles 1 fed from an upper chute. In a process after the vertical sealing, the sheet material 8 is intermittently fed and, accordingly, the feeding of the sheet material 8 from a bobbin 7 of a sheet roll is also carried out intermittently, and the chuck tapes 6'' are also intermittently fed together with the feed sheet material while they are being integrated in an engageable state. The chuck tapes and the sheet material are integrated by heat sealing, the sheet material is elongated, the chuck tapes 6'' are collapsed by a heat sealer, a bag thus made is filled with articles and, in the last step, the bag is laterally sealed and cut thereat to make the bag 2 in a sealed state.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The disclosed technology is in the field of technology for manufacturing bags made of polyethylene film or the like for filling a fixed amount of food or other products handled in the secondary market such as supermarkets, and the field of product filling technology. Belong to.

[0002]

2. Description of the Related Art As is well known, when the life of citizens is improved, a wide variety of products are traded in large and small quantities in secondary markets such as supermarkets, and food products are supplied in a stable manner. In the case of the above products, the manner in which the so-called pillow type or gusset type bags of polyethylene film or other sheet bags are filled and handled after being weighed for each predetermined amount, etc. has become established, and smooth transactions and sales are possible. It is becoming a regular practice.

Therefore, there is a great demand among consumers for a bag in which the purchased product is taken out from the bag and then the sealed state is maintained again to repeatedly open and close the product. As shown in FIG. 8, by providing a zipper 4 on the opening / closing part 3 of the bag 2 filled with the product 1, the packed state of the product 1 can be kept airtight and easily opened. , The zippered bag 2 that can be sealed again has become widely available, and not only has it become persistently popular with the consumer side, but also for distributors, it is possible to improve quality and improve serviceability. From the point of view, it has become widely used.

The chuck 4 is shown in FIG.
As shown in (a), (b) and (c), a strip-shaped tape 6 having a predetermined width and a ridge 5 on one side, and a strip of the same width having a groove 5'corresponding to the ridge 5. -Shaped tape 6 ′ is formed by ridge 5 and concave groove 5 ′ by occlusal integration and easy separation and separation.
As a zipper tape 6 '' that can be occluded in the concave groove 5'of, a technology that can be integrated with the bag 2 by welding it to the material sheet of the bag 2 during bag making has been developed and put into practical use. .

Then, as shown in FIG. 9, a material sheet 8 such as a predetermined polyethylene film is fed from a bobbin 7 of a sheet roll to a former 9 through a dancer roller 10, a guide roller 11 and the like as shown in FIG. During that time, the unoccluded chuck tapes 6 and 6 ′ are also fed from the tape magazines 12 and 12 ′ through the feeding mechanism 21, and the ultrasonic welding device 13 is applied to the vicinity of the edge of the material sheet 8. The material sheet 8 is welded and integrated, and is formed into a cylindrical shape around the cylinder 14 by the former 9, and the protrusions 5 and the concave grooves 5'of the zipper tapes 6 and 6'are engaged with each other by the engaging tool 15 to be integrated. The vertical sealer, and the vertical seal is made by the upper sealer 16 and the bottom sealer 16 '.
In the lower part of 4, the ultrasonic tape presser 17 crushes the zipper tapes 6 and 6'to prevent pinholes and wrinkles from occurring in the horizontal seal of the next stage and to maintain airtightness while maintaining the lower stage. The horizontal sealer 18 performs the horizontal sealing of the product 1 through the chute (not shown) provided on the upper part of the former 9, and the product 1 which is weighed to a predetermined weight in the previous stage is put in to perform the horizontal sealing of the upper part. The cutter 19 provided inside the sealer 18 cuts the product laterally to obtain a bag filled with products.

In the bag making process described above, the material sheet 8 is intermittently lowered (fed) by the intermittent lowering device 20.

As described above, the bobbin 7 of the sheet roll is traditionally used.
Material sheet 8 such as polyethylene film
In the process of supplying the zipper tapes 6 and 6 ′ together with the material sheet 8 in the process of supplying In the preceding stage of performing the vertical and horizontal seals on the material sheet 8, the step of charging and filling the predetermined amount of the product 1 through the chute and the cylinder 14 (not shown) provided on the upper part of the former 9 is taken.

[0008]

However, in the conventional technology, the feeding of the material sheet 8 with the zipper tapes 6, 6 ′ fed to the former 9 by the pulling-down device 20 is intermittent feeding. Therefore, since the feeding mode is different from the continuous feeding of the material sheet 8 from the bobbin 7 of the sheet roll by the feeding mechanism 21, the feeding mechanisms 20 and 21 for the intermittent feeding on the front side and the continuous feeding on the front side are different. Two types are required, which has the drawback of complicating the entire device. In addition, since a certain amount of feed is always required in the bag making process, it is necessary to provide a feed adjustment mechanism for both types of equipment. There is an inconvenience that the whole becomes complicated and the management control becomes complicated, and the maintenance cost as well as the initial cost becomes high.

In addition, welding with ultrasonic energy to the chuck tapes 6 and 6'has a demerit that the cost is increased because an expensive welding device 13 is attached, and in addition, the feeding of the material sheet 8 is continuous. Therefore, it requires a very high level of skill to select and adjust the amplitude of the booster that gives vibration to the horn of the ultrasonic welding device 13 that is integrated with the chuck tapes 6 and 6 ', and its management control is extremely difficult. was there.

Further, there is a problem in that the heat generated from the fusing device 13 during continuous operation causes a bad heat effect such as wrinkling of the film of the material sheet 8.

Further, since the welding using ultrasonic energy is used, there is a drawback that when the material sheet 8 and the chuck tapes 6 and 6'are made of different materials, the matching is not successful in welding and the welding property is deteriorated. It was

These problems are caused by the applicant's earlier application, Japanese Patent Application Laid-Open No. 4-
The same applies to the improved invention of Japanese Patent No. 87916.

[0013]

OBJECT OF THE INVENTION The object of the invention of this application is to perform product filling in a bag making process using a material sheet such as a polyethylene film based on the above-mentioned prior art, and further, a zipper tape is automatically welded to the end of the bag. The technical problem that should be solved is that the zipper tape is securely welded to the material sheet during bag making without wrinkling of the material sheet. All of these processes can be performed easily, and the processes can be simplified. Not only the initial assembly of manufacturing, but also maintenance and inspection maintenance, management control, and adjustment of the device during operation are easy, and cost reduction can be achieved. Thus, it is intended to provide an excellent bag-making and filling method which is useful in the field of utilizing the product handling technology in the distribution industry, and an apparatus which is directly used in the method.

[0014]

In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned object, is made of polyethylene film or the like filled with a predetermined product. A material sheet made of polyethylene film or the like is welded to the edge of the bag from the bobbin of the sheet roll through a dancer roller, a guide roller or the like to the former, and along the outer surface of the cylinder provided in the former. In the process of forming the material into a cylindrical shape and intermittently pulling down the material sheet by a predetermined intermittent pulling down device and feeding the material sheet, the zipper tapes which are in an interlocking state are passed from a magazine or the like through a guide reel. Feed it to the vertical seal part of the former through a fin-shaped guide, and intermittently feed it together with the material sheet In the process of pulling down intermittently on the side and performing vertical sealing of the top and bottom parts, the tape sealer is used to supply the zipper tape to the inner surfaces of the pair of edge portions of the material sheet in an inserted state and integrally weld with the material sheet. In the lower stage, the sheet pulling piece stretches the sheet wrinkle, and the heat seal type tape presser crushes the chuck part so that there is no wrinkle or air leakage in the lateral seal, Then, through a chute or the like provided on the top of the cylinder, the product that has been weighed in a predetermined manner in the previous stage is put in and filled, and then,
The upper and lower parts are laterally sealed and cut so that the product-filled bag can be obtained, and the material sheet feed from the bobbin of the sheet roll is linked to the intermittent feed in the bag making process. The entire device is simplified, and the zipper tape can be tightly and efficiently welded to the bag, the maintenance and inspection and the control can be easily performed, and the cost reduction can be achieved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the invention of this application will be described below with reference to FIGS. 4 and 5 and with reference to FIGS.

The same parts as in FIG. 9 will be described using the same reference numerals.

Reference numeral 22 denotes a bag-making and filling device which forms the center of one of the gist of the invention of this application, and is an embodiment used for hermetically filling and storing a predetermined product 1 in a bag 2 made of polyethylene film. A hopper-type chute that is connected to a front-stage weight measuring device (not shown) is connected to the upper portion of a cylinder 14 having a circular cross section that extends downward from the inside of the former 9, and the upper portion that faces the lower portion from the center of the cylinder 14 faces the upper portion. A vertical sealer 16 and a bottom vertical sealer 16 'are provided on the device frame in the same manner as in the conventional mode, and an intermittent lowering device 20 is provided on the lower side of the device frame so as to face each other. It is electrically connected to 23.

A tape presser 17 of an electric heat sealer is provided below the intermittent lowering device 20 so that the heat blocks 17 'and 17' face each other and can be moved toward and away from each other and can be moved up and down. And is electrically connected to the control device 23 and synchronized with the intermittent pulling-down device 20 to perform a predetermined intermittent pulling-down operation to give a crushing action to the occlusal portion 61 of the chuck tape 6 ″ to give a predetermined pitch. You can give a crush seal with.

A sheet pulling piece 17 '' for wrinkle stretching of the material sheet 8 is provided just above the tape presser 17.
17 ″ is arranged so as to face the edge of the material sheet 8 and is moved up and down to move away from and move away from the heat blocks 17 ′ and 17 ′ at a slight timing to prevent wrinkling of the material sheet 8. Is being done.

A horizontal sealer 18 is provided below the tape presser 17, and a cutter 19 incorporated therein is provided.
Is electrically connected to the control device 23, and is intermittently operated in synchronization with the intermittent pull-down device 20 to cut and drop the bag 2 filled with the product 1.

The material sheet 8 made of polyethylene film or the like is fed from the bobbin 7 of the sheet roll to the former 9 via the dancer roller 10, the guide roller 11 and the like.

The above-mentioned basic mechanism is substantially the same as the conventional mode shown in FIG.

Thus, in the invention of this application, the intermittent pulling-down device 20 intermittently pulls down the raw material sheet 8 from the bobbin 7 of the sheet roll on the outer surface of the cylinder 14 of the cylinder 14. It is designed to be delivered intermittently to the farmer 9.

Therefore, the feeding mechanism for the material sheet 8 does not need to be equipped with two kinds of feeding mechanism such as the continuous feeding mechanism near the bobbin 7 side of the sheet roll and the intermittent feeding mechanism on the cylinder side as in the conventional mode. .

Further, a magazine 12 "of the zipper tape 6" is arranged on the upper side of the former 9 to drive the drive unit 20.
'', The zipper tapes 6 and 6'are wound for a predetermined length with the concave grooves 5'corresponding to the ridges 5 in an occlusal state, and are wound for a predetermined length. 'Is the former 9 through the guide reels 24, 24 ...
3 between the outer side of the inner guide 25 and the outer side of the outer guide 25 'and the material sheet 8 which are fixedly mounted via a bracket 26 integrally fixed to the outer side of the cylinder 14 of FIG. It is supposed to be sent as shown in.

An insertion gap 27 for the occlusal portion 61 of the zipper tapes 6, 6'is formed between the guides 25, 25 ', and the guides 25, 25' are flush with each other with the insertion gap 27 in between. It is intended to lie along (ie, collinear in cross section).

A guide roller 28 for the chuck tapes 6, 6'is pivotally provided at a predetermined portion between the guides 25, 25 '.

At the lower part of the guide roller 28 and at the upper part of the pulling-down device 20, not the conventional sealer using ultrasonic energy, but an electrothermal heat sealer 29,
29 is provided adjacent to the side of the upper vertical sealer 16 so as to be able to approach and separate from each other in an opposed posture, and the zipper tape 6 ″ in an occlusal state is inserted into the edge of the material sheet 8 so that the material sheet 8
It is designed to be integrally welded to the inner surfaces of the front side and the back side.

Therefore, the material sheet 8 is vertically sealed at both ends and is in the occlusal state with the zipper tape 6 ''.
Are to be welded together.

In the bag-making and filling device 22 having the above-described structure, when the intermittent pulling-down device 20 starts the operation in the state where the material sheet 8 is externally cylinder-shaped, the material sheet 8 is intermittently operated. The bobbin 7 of the sheet roll is intermittently pulled with a predetermined tension from the bobbin 7 of the sheet roll by the pulling drive by the pulling device 20.
Is intermittently fed from the dancer roller 10 and the guide roller 11 to the former 9, and both edge portions thereof are integrally molded by the former 9 on the outside of the cylinder 14 and intermittently pulled downward. As shown in FIG. 3, FIG. 5, and FIG. 6, between the inner surfaces of the pair of edge portions of the material sheet 8 guided by the inner guide 25 integrally fixed to the cylinder 14 and the outer guide 25 ′. The occlusal portion 61 of the zipper tape 6 ″ in the occlusal state slides vertically into the gap 27 between the guides 25 and 25 ′, and the zipper tape 6 ″ and the material sheet 8 are separated from each other by the heat sealer 2
9 and 29 are integrally welded together with the upper sealer 1
6, and the bottom sealer 16 'vertically seals the top and bottom. At the bottom of the top sealer 16, air leakage or wrinkles due to swelling of the zipper tape 6''is caused by pinholes or the like. In order to prevent the occurrence of the above, the heat sealer type tape presser 17 synchronizes the heat blocks 17 'and 17' via the control device 23 in synchronization with the operation signal of the drive device 20 'of the intermittent pulling down device 20. It is operated in a timed and intermittent manner to provide a crushing action, and the sheet pulling pieces 17 ", 17" on the upper portion thereof.
And the horizontal sheet sealer 18 at the lower part of the blank sheet 8 to perform a predetermined wrinkle action by the control device 23 to perform the horizontal sealing, and at the same time, the upper weighing device at the front stage. The product 1 weighed by a predetermined amount is charged by the chute (not shown) through the cylinder 14 and the upper horizontal seal is performed at the next predetermined timing, and the cutter 19 cuts the product horizontally to fill the product 1. The bag 2 is dropped and transferred to the next processing step.

Therefore, since the tape presser 17 operates intermittently as a heat sealer, there is no bad influence of heat on the material sheet 8 and the chuck tape 6 ″ by the conventional ultrasonic integrated welding device, and the heat sealer 2 is used.
With 9,29, the integral welding of the zipper tape 6 ″ to the material sheet 8 is surely performed.

The material sheet 8 is fed from the bobbin 7 of the sheet roll by the integral intermittent pulling-down device 20 provided on the outer side of the cylinder 14 to form the material sheet on the outer side of the cylinder 14. It is carried out by the same feed as the intermittent pull-down feed of 8.

Also, the magazine 12 "of the chuck tape 6"
The feed from the feed is also made an intermittent pull-down feed, and the entire feeding mechanism is significantly simplified.

Then, as in the embodiment shown in FIG. 7, the heat sealers 29, 29 for the zipper tape 6 ″ of FIG.
Both are fixed in the fully open position so that the chuck tape 6 '' is not fed from the magazine 12 '' and the vertical sealer 1
A four-way seal packaging can also be made possible by operating 6 with a predetermined proximity to the cylinder 14 side.

The embodiment of the invention of this application is not limited to the above-mentioned embodiments. For example, as the material sheet, various materials such as paper, cloth, mesh, etc. can be adopted in addition to the polyethylene film. is there.

Needless to say, a gusset type bag or the like can be adopted as the target bag other than the pillow type.

Further, it goes without saying that the target product may be a product other than a food product.

[0038]

As described above, according to the invention of this application, it is possible to open and reseal by using a zipper for a commodity-filled bag that is basically used in the secondary market. In automatic bag-filling, where confidentiality is reliably maintained and the advantages of reliability for quality assurance, etc. are fully utilized, in the case of automatic bag filling, feeding and feeding of the sheet roll of the material sheet such as polyethylene from the bobbin and the former Since the single feeding mechanism performs intermittent pulling down in the process of performing vertical and horizontal sealing after forming the circle on the outside of the cylinder, the structure is extremely simple in terms of equipment,
Not only the initial assembly of the device, but also the effect of facilitating the maintenance, inspection and maintenance control, management, and adjustment can be remarkably achieved, and the excellent effect of significantly reducing the cost can be achieved.

Then, in the process of performing vertical sealing in the step of intermittently pulling down the material sheet, the chuck tape is fed together with the material sheet in the same intermittent feed and inserted between both edge portions of the material sheet for heat sealing. Unlike conventional welding using ultrasonic energy, the welding can be performed without being affected by the welding speed, and there is the effect that it is not necessary to select or adjust the booster of the conventional ultrasonic welding device. By using a heat sealer, it is possible to operate intermittently as in the case of intermittent pulling down, so there is an effect that the heat generation due to continuous ultrasonic irradiation does not occur, resulting in good product yield and treatment efficiency. The effect is also improved.

By welding the zipper tape to the material sheet with the heat sealer in the process of forming the circular cross section by the former, the occlusal integrated strip is formed as the sheet roll is fed.
Unlike the method of welding each zipper tape to each strip on the material sheet sent from the bobbin of the sheet roll in the former stage of the former, irregular shapes such as wrinkles appear in the middle dancer roller and guide roller. In addition, heat generation is prevented in the former stage of the former, and in combination with the crushing action of the tape presser by the heat sealer, air leaks and wrinkles in the bag do not occur, and the excellent effect of further improving the reliability of the product is achieved. Played.

[Brief description of drawings]

FIG. 1 is an overall schematic perspective view of a device structure according to an embodiment.

FIG. 2 is a partial cross-sectional view of welding a material sheet and a zipper tape.

FIG. 3 is a partial sectional view of a guide.

FIG. 4 is a sectional view of a zipper tape.

FIG. 5 is a partial cross-sectional view of a zipper tape guide and a heat sealer.

FIG. 6 is a front perspective view of the same.

FIG. 7 is a partial cross-sectional view of another embodiment.

FIG. 8 is a perspective view of a bag.

FIG. 9 is a perspective view of a main part mechanism of a bag making and filling device based on a conventional technique.

[Explanation of symbols]

 9 Former 8 Material sheet 6 '' Zipper tape 1 Product 16, 16 'Vertical sealer 18 Horizontal sealer 14 Cylinder 20 Intermittent pulling down device 22 Bag making and filling device 12' 'Zipper tape feeding device 25, 25' Guide 29 Tape sealer 17 'Tape presser 17' 'Seat tension piece

Claims (10)

[Claims] 1. A raw material sheet and a zipper tape integrated in a mutually occlusal state are fed to the former and integrally attached thereto, and then a vertical seal and a horizontal seal are performed on the raw material sheet to form a bag while forming the bag. In a bag-making filling method in which products are filled from the upper part, the strip-type zipper tapes which are integrated with each other in the interlocking state in the process of vertically sealing the material sheet by the former are opposed to each other at opposite edges of the material sheet. And a zipper tape and a material sheet are integrally heat-sealed by a tape sealer so that the tape seal portion is crushed at a later stage. 2. The bag making and filling method according to claim 1, wherein the vertical seal, the horizontal seal, and the tape seal are performed during intermittent feeding of the material sheet. 3. The method according to claim 1, wherein the feeding of the material sheet from the sheet roll bobbin is carried out by the same intermittent feeding as the tape sealing.
The bag-making filling method according to the item. 4. The bag-making filling method according to claim 1, wherein the tape sealing is performed electrically. 5. The bag making and filling method according to claim 1, wherein the feeding of the zipper tape is carried out intermittently in association with the intermittent feeding of the material sheet. 6. A bag-making and filling apparatus in which a vertical sealer and a horizontal sealer below the vertical sealer are provided on the outside of the cylinder of the former, and an intermittent lowering device for the material sheet is provided, and a chuck tape is fed to the former. A device is installed side by side, the pulling-down device is attached to the lower side of the vertical sealer, the guide of the chuck tape is attached to the cylinder, and a pair of tape sealers for the chuck tape is provided with the guide in between. And a sheet tensioning piece and a tape presser are arranged vertically between a vertical sealer and a horizontal sealer below the vertical sealer. 7. The bag-making and filling apparatus according to claim 6, wherein the tape sealer and the vertical sealer are arranged vertically and laterally adjacent to each other. 8. The bag-making and filling apparatus according to claim 6, wherein the tape presser is a heat sealer. 9. The bag making and filling apparatus according to claim 6, wherein the sheet pulling piece is arranged on the tape sealer. 10. The tape sealer is in a fully open position,
7. The bag making and filling device according to claim 6, wherein a vertical sealer is provided close to the cylinder.