JPH0487916A - Bag-making and filling, and device therefor - Google Patents

Abstract

PURPOSE:To simplify the configuration of a bag-making/filling machine and improve the processing efficiency by a method wherein in the longitudinal sealing step of the raw material sheet intermittent pull-down process, a zipper tape is intermittently fed by a specified length at a time and inserted between the edges of a twice-folded raw material sheet to carry out heat-sealing. CONSTITUTION:When an intermittent pull-down device 18 is brought in operation with a raw material sheet 8 mounted on the outside of a cylinder 13, the raw material sheet 8 is intermittently sent to a former 9. A zipper tape 4' in engaged state is led between an outer guide 23' through an inner guide 23 and a bracket 24 of the cylinder 13, inserted between the edges of the twice-folded raw material sheet 8, and fuse-bonded to the raw material sheet 8 by a heat sealer 22. At the same time, longitudinal sealing is carried out by upper and bottom longitudinal sealers 14 and 14'. A tape presser 15 of a supersonic welder, which presses the lateral seal zipper tape, is provided under the upper longitudinal sealer 14 and put in intermittent action synchronizing with the intermittent pull-down device 18. Lateral sealing is performed by a lateral sealer 16 located under the tape presser 15 and a product 1 is filled in by a chute 17. Lateral sealing of the upper part is carried out and the film is cut off by a cutter 17.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is applicable to the production of bags made of polyethylene film or the like, which are filled with products such as foodstuffs handled in distribution markets such as supermarkets by a certain weight; It belongs to the field of product filling technology.

<Summary of the gist> The invention of this application feeds a sheet of material such as a polyethylene film and a pair of zipper tapes in an interlocking state to a former that is connected to a weight measuring device in the previous stage via a chute or the like. This invention relates to a method in which a predetermined product is filled from an upper chute through a former while bag making by performing predetermined vertical and horizontal seals, and an apparatus used directly in the method, In particular, by intermittent feeding of the material sheet in the process after vertical sealing, the feeding of the material sheet from the sheet roll is also done intermittently, and in the process of feeding the material sheet to the former, the zipper tape is also fed in its occluded state. The zipper tape and the material sheet are fed intermittently together with the material sheet, and in the sealing process, the zipper tape and the material sheet are heat-sealed and integrated, and at the bottom, the zipper tape is crushed using an ultrasonic welder, etc., and the product is sealed laterally and the product is filled. This invention relates to a bag making and filling method and apparatus in which the bags are sealed, and then laterally sealed and cut to form sealed bags.

<Prior art> As is well known, as people's lives improve, a wide variety of products are traded in large quantities and small quantities in secondary markets such as supermarkets, and in order to ensure a stable supply, products such as foodstuffs are traded. It has become common practice for products to be weighed in units of predetermined weights and filled into pillow-type or gusset-type bags made of polyethylene film or other sheets, allowing for smooth transactions and sales. .

Therefore, there is a strong demand among consumers for bags that are repeatedly sealed and opened after the purchased product is taken out of the sealed bag and then kept in a sealed state again. As shown in the figure, bag 2 filled with product 1
By providing a zipper 4 on the opening/closing part 3, the bag 2 with a zipper maintains the airtightness of the filled state of the product 1, and can be easily opened and sealed again. has become widely available and has not only gained deep popularity among users, but also has come to be widely used by those involved in the market from the standpoint of quality assurance and improved serviceability.

Such a chuck 4 is shown in FIG. 4 (a).

As shown in (b) and (c), a strip-shaped tape 6 of a predetermined width having a protrusion 5 on the -5 side and a tape 6' of the same width having a groove 5' corresponding to the protrusion 5 are used. The protrusion 5, and
Tape 6
, 6' have been developed and put into practical use as a V-tuck tape 4' which is engaged with the concave groove 5' of the protrusion 5 and is welded to the material sheet during bag making.

As shown in FIG. 6, a predetermined material sheet 8 such as a polyethylene film is transferred from the sheet roll 7 to a dancer roller 0. During this time, the tape magazine 1212' feeds the zipper tape 6.6' in an unattached state, and the welding device 12 uses ultrasonic energy to near the edge of the material sheet 8.
' to weld and fix the former to the material sheet 8.
9 to form a cylindrical shape around the cylinder 3, an engagement tool 12'' to engage the convex strip 5 and the groove 5', and a vertical sealer 14 to form an upper sealer 14 and a bottom sealer 14'.
Vertical sealing is carried out by
The lower row of horizontal seals was performed using horizontal sealer 16 while preventing pinholes and wrinkles in the next stage of horizontal seals and maintaining airtightness.
The product 1, which has been weighed to a predetermined weight in the previous stage, is fed through a chute 17 provided at the top of the bag, the top is horizontally sealed, and at the same time it is cut by a cutter 16' to obtain a bag filled with the product. Ta.

In the bag making process described above, only intermittent pulling down was performed by the intermittent pulling down device 18.

Conventionally, in the process of supplying a material sheet 8 such as a polyethylene film wound around a bobbin to the former 9, the zipper tape 4' is supplied together with the material sheet 8, which is welded by ultrasonic energy and then supplied to the former 9. In the bagging process, before the process of vertically and horizontally sealing the material sheet 8, a predetermined weighed product 1 is transferred to a cylinder 13. A step of charging and filling through a chute 17 was used.

<Problem to be solved by the invention> However, in the conventional technology of the type, Former-9
Since the bag making process using the pull-down device 18 of the material sheet 8 with the zipper tape 4' fed to the machine was carried out intermittently, the continuous supply and feeding mode of the material sheets 1-8 from the sheet roll 7 Because of the difference in the feed mechanisms 18 and 19, one for intermittent feed on the other side and one for continuous feed on the other side, the entire device becomes complicated, and moreover, the bag making process is always Since only a certain amount of feed is required, a feed adjustment mechanism for both must be provided, which makes equipment downtime increasingly complicated and management control complicated.In addition, not to mention the initial cost, Another disadvantage was that maintenance costs were high.

Moreover, welding the zipper tape 4' by ultrasonic energy key has the disadvantage that it requires an expensive welding device 12', which further increases the cost.Furthermore, the material sheet 8 is continuously fed. However, the selection and adjustment of the amplitude of the booster that applies vibration to the horn of the ultrasonic welding device 12' requires extremely high skill and is extremely difficult to manage and control.

Further, there is a problem in that the heat generated from the welding device 12' due to continuous operation causes adverse thermal effects such as wrinkles in the film of the material sheet 8.

Further, since welding using ultrasonic energy keys is used, there is also a drawback that if the materials of the material sheet 8 and the zipper tape 4' are different, matching may not be performed well in terms of weldability, resulting in poor weldability.

<Purpose of the Invention> The purpose of the invention of this application is to fill the product in a bag making process using a material sheet such as a polyethylene film based on the above-mentioned prior art, and furthermore, a zipper tape is automatically welded to the edge of the bag. We considered the problems associated with this problem to be a technical issue to be solved, and in the bag making process, we were able to reliably weld the zipper tape material tape, and also fill the product, making the entire process extremely simple. The process can be simplified, and it is easy to perform not only initial assembly, but also maintenance, inspection, maintenance, management control, and adjustment during operation, and can reduce costs, benefiting the field of product handling technology that is open to the distribution industry. It is an object of the present invention to provide an excellent bag making and filling method and an apparatus that can be directly used in the method.

<Means/effects for solving the problem> In accordance with the above-mentioned purpose, the invention of this application, which is summarized in the claims of the previous patent, is to solve the above problem (e). In order to weld a zipper tape to a bag such as a bag, a material sheet such as polyethylene film is fed from the sheet roller to a former via a dancer roller, a guide roller, etc.
The zipper tape is formed into a cylindrical shape along the outer surface of a cylinder installed in the cylinder, and the zipper tape in the occlusal state is transferred from a magazine or the like to a guide reel during the process in which the material sheet is intermittently drawn down and fed by a predetermined intermittent drawing device. It is fed through a guide to the vertical sealing part of the former, and is pulled down integrally with the material sheet by intermittent feeding, and in the process of vertically sealing the top and bottom, a heat sealer is used to The rope material sheet is inserted into the inside of a pair of edges and welded together, and the tape presser of the ultrasonic welder crushes the chuck part at the lower stage to eliminate wrinkles and air leaks in the horizontal seal. In addition, the lower part is horizontally sealed in the lower stage, and the product that has been weighed and weighed in the previous stage is charged through a chute installed at the top of the cylinder, and then , the upper part is horizontally sealed and cut to make it possible to make 1q of bags filled with products, and the feeding of the material sheet from the sheet roll is in an intermittent feeding state linked to the intermittent feeding in the bag making process. , the entire device has been simplified, and regardless of the materials of the material sheet and zipper tape being the same, the zipper tape can be tightly and efficiently welded to the bag, and maintenance, maintenance, and control are easier, and costs can be reduced. This was achieved by taking technical measures.

<Embodiment> Next, an embodiment of the invention of this application will be described below with reference to FIGS. 1 to 3, with reference to FIGS. 4 and 5. Note that the same parts as in FIG. 6 will be explained using the same reference numerals.

Reference numeral 20 denotes a bag making and filling device which forms the center of one of the gist of the invention of this application, and is used to fill a bag 2 made of polyethylene film with a predetermined product 1 in a sealed state.
A hopper-type chute 17 is provided at the top of a cylinder 13 with a circular cross section in the former 9, and is connected to a front-stage weighing device (not shown).
3, an upper vertical sealer 14 and a bottom vertical sealer 14' are provided on the frame from the center to the lower part, as in the conventional method,
An intermittent pull-down device 18 is provided below, and its drive device 18' is electrically connected to a predetermined control device 21.

Further, an ultrasonic welder tape presser 15 is provided below the intermittent pull-down device 18, and a horn 15' and an anvil 15'' are provided facing each other and are electrically connected to a control device 21 for intermittent pull-down operation. A predetermined intermittent operation is performed in synchronization with the lowering device 18.

A horizontal sealer 16 is placed below the tape presser 15.
The cutter 17 is electrically connected to the control device 21 and operates intermittently in synchronization with the intermittent pull-down device 18 to cut and discharge the bag 2 filled with products. There is.

Then, a material sheet 8 made of polyethylene film or the like is transferred from a sheet roll 7 to a dancer roller 10. Guide roller 11
etc., to the former 9.

The basic mechanism described above is substantially the same as the conventional mode.

Therefore, in the invention of this application, the intermittent pull-down device 1
8 on the outer surface of the cylinder 13 of the material sheet 8 is immediately adapted to feed the material sheet 8 from the sheet roll 7 to the former 9 by similar intermittent drawing.

Therefore, there is no need for two types of feeding mechanisms.

In addition, a zipper tape 4' is attached to the upper side of the former 9.
A magazine 12 is arranged, and a zipper tape 4' is wound in an interlocking state, and the zipper tape 4' is taken out.
The inner guide 23 shown in FIGS. 2-3 is integrally provided with the cylinder 13 of the former 9 via the guide reel 12', and the outer guide 23' is appropriately fixed to the device frame by means of a bracket 24. An electrothermal heat sealer 22, 22 is provided adjacent to the side of the upper vertical sealer 14 to form an occlusal state within the edge of the material sheet 8. A zipper tape 4' is inserted therethrough and integrally welded to the material sheet 8 by a heat sealer 22.22.

Therefore, the material sheet 8 is vertically sealed and the zipper tape 4' in an interlocking state is integrally welded to the material sheet 8.

In the bag making and filling apparatus 20 configured as described above, when the intermittent pulling down device 18 operates with the material sheet 8 wrapped in a cylindrical shape outside the cylinder 13, the material sheet 8 is pulled with a predetermined tension, From sheet roll 7 to dancer roller 10. Former via guide roller 11
The cylinder 13 is intermittently fed to the cylinder 13, and both edge portions are integrally formed on the outside of the cylinder 13 by the former 9, and are intermittently pulled downward.
an inner guide 23 that is integral with the device frame, and an outer guide 23' that is integrally provided with the device frame via a bracket 24.
The heat sealer 22° 22
The material sheet 8 and the chuck cheep 4' in the occlusal state are integrally welded together, and the upper vertical sealer 14 and the bottom vertical sealer 14' perform vertical sealing of the upper and lower parts. At the bottom, a deep pleather 15 of an ultrasonic welder is operated by a drive device 18 of an intermittent pull-down device 18 in order to prevent air leakage or wrinkles from occurring through pinholes or the like due to expansion of the horizontal seal portion zipper tape. ' is sent to the horn 15 via the control device 21.
' and the anvil 15'' are synchronously operated intermittently to provide a crushing action, and at the bottom thereof, the transverse sealer 16 or the control device 21 operates in a predetermined manner to perform transverse sealing. At the beginning, the product 1 is weighed to a predetermined weight by the weighing device in the previous stage of the upper part, and is charged into the chute 17 through the cylinder 13, and then, at the next predetermined timing, the upper part is horizontally sealed and the cutter 17 cuts the product horizontally. The bag 2 filled with products is discharged.

Therefore, since the tape presser 15 operates intermittently even though it is an ultrasonic welder, there is no adverse thermal effect on the material sheet 8 or zipper tape 4' caused by conventional ultrasonic body welding equipment, etc., and the heat sealer 22, 22
material sheet 8 and zipper tape 4' for welding.
Regardless of whether the material is the same or different, the zipper tape 4' can be surely integrally welded to the fiber sheet 8.

The cable sheet 8 is fed from the sheet roll 7 by an intermittent pull-down device 181 provided outside the cylinder 13.
This is carried out at the same time as the intermittent downward feeding of the material sheet 1-8 formed in a cylindrical shape on the outside of the cylinder 13.

Further, the feeding of the zipper tape 4' from the magazine 12 is similarly performed by intermittent downward feeding, and the entire feeding mechanism is significantly simplified.

It is needless to say that the embodiments of the invention of this application are not limited to the above embodiments. For example, in addition to polyethylene film, various materials such as paper, cloth, mesh, etc. can be used as the material sheet.

It goes without saying that the target bag may be of the cassette type or the like in addition to the pillow type.

It goes without saying that the target products may also be products other than foodstuffs.

<Effects of the Invention> As described above, according to the invention of this application, product filling bags used in the distribution market can be opened and resealed at will by using a zipper, and moreover, they can be kept confidential when closed. In automatic bag making and filling, which can fully take advantage of the advantages of reliable retention and reliability in terms of quality assurance, etc., feeding a sheet of material such as polyethylene from a sheet roll and forming a circle on the outside of the cylinder. Intermittent pulling down in the vertical and horizontal sealing process after forming can be performed using a single feeding mechanism, making the equipment extremely simple in structure, and not only initial assembly but also maintenance, inspection, maintenance control, and adjustment can be done with just a chopstick. This has the effect of making it easier to clean, and has the excellent effect of significantly reducing costs.

Therefore, in the vertical sealing process during the intermittent drawing down process of the material sheet, the zipper tape is fed intermittently and inserted between both edges of the material sheet and heat-sealed, thereby eliminating the conventional welding using ultrasonic energy. Unlike the previous method, welding can be performed regardless of whether the zipper tape and material sheet are made of the same or different materials, and regardless of the welding speed, and there is no need to select or adjust the booster of the ultrasonic welding device. Also, by using ultrasonic welding on the tape presser, intermittent operation similar to intermittent pull-down is possible, so there is no adverse effect of heat generation due to continuous ultrasonic irradiation, and as a result, product yield is reduced. This also has the effect of improving processing efficiency.

Then, the zipper tape is welded to the material sheet at the front stage of the former, and the zipper tape is welded to the material sheet sent out from the sheet roll by vertical sealing in the cross-sectional circular formation process by the former. In contrast, irregularities such as wrinkles do not appear on the dancer roller or guide roller in the middle, and heat generation in the previous stage of the former is prevented, and combined with the crushing action of the tape presser by the ultrasonic wave elder, etc. This has the excellent effect of further improving the reliability of the product without causing air leakage or wrinkles in the bag.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of one embodiment of the invention of this application, FIG. 1 is a schematic perspective view of the device structure, and FIG.
Figure 3 is a partially sectional side view of the guide, and Figures 4 (a) and (b). (c) is a cross-sectional view of the zipper tape, FIG. 5 is a schematic perspective view of a bag, and FIG. 6 is a perspective view of the main mechanism of a bag making and filling apparatus based on the prior art. 23, 23'...Guide 15...Tape presser 22...Heat sealer 8...Material processed...Product 16...Horizontal sealer 18...Intermittent pull-down device 9...Former - 4'...Zipper tape 14, 14'...Vertical sealer 13...Cylinder 20...Bag making and filling device 12...To the zipper tape feeding device Fig. 4

Claims (7)

[Claims] (1) In a method in which a material sheet and a zipper tape in an interlocking state are fed to a former, vertical sealing and horizontal sealing are performed to form a bag, and products are filled from the upper part of the former. A bag making and filling method characterized in that, in the vertical sealing process, the interlocking zipper tape is fed between opposing edges of the material sheet, and the zipper tape and the material sheet are integrally heat-sealed. Method. (2) The bag making and filling method according to claim 1, wherein the vertical sealing, horizontal sealing, and heat sealing are performed during intermittent feeding. (3) The bag making and filling method according to claim 1, wherein the material sheet is fed out from the roll in the same intermittently as the intermittently fed during heat sealing. (4) The bag making and filling method according to claim 1, wherein the zipper tape is fed in conjunction with the intermittent feeding of the material sheet. (5) In 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 pull-down device for the material sheet is provided, the former is provided with a zipper tape feeding device. A guide for the zipper tape is attached to the cylinder, a heat sealer is provided for the zipper tape with the guide in between, and a tape presser is installed between the vertical sealer and the horizontal sealer below. A bag making and filling device characterized by: (6) The bag making and filling apparatus according to claim 5, wherein the heat sealer and the vertical sealer are disposed adjacent to each other. (7) The bag making and filling apparatus according to claim 5, wherein the tape presser is an ultrasonic welder.