JP2012166841A - Packaging method and system of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging method which enables a packaged goods having a valve function to be obtained at a low cost of packaging, and a system of the same.SOLUTION: Silicone oil S is applied to one end of a strip-like film F drawn from a film roll 26 by application means 44. The strip-like film F fed into bag making means 34 is formed in a cylindrical shape in such a manner that in both the end edges, the coated surfaces of the silicone oil S are overlapped inside, and an overlapping portion 12 resembling palms of two hands put together is formed. A non-woven fabric 24 draw from a non-woven fabric roll 30 is heated and welded to the inside of the film so that an inside base of the overlapping portion 12 is stridden. A longitudinal seal is applied to the overlapping portion 12 of the cylindrical film Fa so that a partial adhesion portion is formed on the applied portion of the silicone oil S in the longitudinal seal part 14, and an airtight adhered part is formed on the residual portion. In a cylindrical film Fa, an air tight traversal seal is applied and cut together with non-woven fabric 24 at vertical positions sandwiching the partially adhered portion of the longitudinal seal part 14.

Description

  The present invention relates to a packaging method and apparatus for obtaining a bag-packed product capable of releasing gas generated from articles in a bag after bagging in a bag-filling machine.

  As a bag of goods that generate gas, such as roasted coffee beans, a degassing valve is attached to the bag, and when the internal pressure of the bag increases, the gas is released to the outside from the degassing valve Is adopted.

  As a method for obtaining the above-described bag-packed product in a vertical bag making and filling machine, for example, as disclosed in Patent Document 1, a notch is formed in a strip-shaped film drawn from a supply source and wound into a roll shape to be predetermined. A technology that intermittently pulls out the release paper with the degassing valve attached at every interval, and sticks the degassing valve peeled off from the release paper to the cylindrical film formed by the bag making means according to the cut formation position Has been proposed.

Japanese Patent No. 2855344

For example, for the office coffee service (OCS), the packaging form in which the degassing valve is attached to the bag as described above is a packaging of about 70 g of coffee powder corresponding to the amount extracted by the coffee server. In the case of a packaged product in which coffee is packaged in units smaller than 200 g, such as a packaged product to be sold, the ratio of the packaging material cost to the unit price of the product becomes high and cannot be sold at an appropriate market price. Therefore, such a bag with a valve with high packaging costs is not adopted for a bag-packed product with a low product unit price.
Furthermore, the vertical bag making and filling machine equipped with a device for attaching a gas vent valve also points out problems such as increased device costs.
That is, the present invention has been proposed to solve this problem in view of the above-mentioned problems inherent in manufacturing a bag-packed product that requires degassing according to the prior art, and is less expensive than the prior art. It is an object of the present invention to provide a packaging method and apparatus capable of obtaining a packaged product having a one-way valve function at a packaging cost.

In order to overcome the above-mentioned problems and achieve the intended purpose, a packaging method according to the invention of claim 1 comprises:
Applying a liquid sealing agent by an application means to the edge portion along the longitudinal direction of the strip-shaped film drawn from the supply source every time a film for one package is conveyed,
Forming a band-like polymerized portion by forming the belt-like film into a cylindrical shape by bag-making means so that the application surface of the liquid sealing agent is polymerized on the inner sides of both edge portions of the belt-like film,
In the tubular film, the nonwoven fabric is drawn and guided in an arrangement straddling the inner base portion of the overlapping portion, and is overlapped on the inner surface of the tubular film, and the nonwoven fabric is continuously sealed on the inner surface of the film on both sides of the inner base portion,
On the downstream side where the nonwoven fabric is transported together with the cylindrical film, the liquid sealant is applied in the polymerization portion, and an airtight vertical seal is applied, leaving an air passage communicating the inside and the outside of the cylindrical film,
The cylindrical film is sandwiched with the non-woven fabric on both sides off the air passage, and a hermetic transverse seal is applied in a direction crossing the conveyance direction of the cylindrical film, whereby the front and back positions of the article filled in the cylindrical film The gist of the invention is to form a lateral seal portion in the bag to obtain a packaged product.

  The gist of the invention according to claim 2 is that the liquid sealing agent is applied to the belt-like film by the coating means in the film transport path that reaches the polymerization position of the belt-like film by the bag making means.

  In the invention which concerns on Claim 3, the said ventilation path is the vicinity of the said horizontal seal | sticker part, Comprising: In the position corresponding to the void formed between adjacent bagging goods when a plurality of bagging goods are piled up The gist is the formation.

In order to overcome the above-mentioned problems and achieve the intended purpose, a packaging device according to the invention of claim 4 is provided:
Bag making means for polymerizing the both edge portions along the longitudinal direction of the belt-like film into a palm shape and forming it into a cylindrical shape,
As the belt-shaped film is transported upstream of the position of the belt-shaped film by the bag making means, a liquid sealant is applied to the edge of the belt-shaped film along the longitudinal direction at predetermined intervals. Application means for applying;
Nonwoven fabric in which a nonwoven fabric is drawn and guided so as to overlap the inner surface of the tubular film in an arrangement straddling the inner base portion of the polymerization portion of the tubular film formed by the bag making means, and the nonwoven fabric is sealed to the inner surface of the film on both sides of the inner base portion A supply seal device;
Filling means for filling the tubular film with articles;
Film transport means for transporting the tubular film sealed with the nonwoven fabric,
Vertical sealing means for sandwiching the overlapped portion and applying an airtight vertical seal to the overlapped portion, leaving an air passage communicating the inside and outside of the cylindrical film at a position corresponding to the application site of the liquid sealant;
The gist is provided with a lateral sealing means that sandwiches the tubular film together with the nonwoven fabric at a position away from the air passage and performs an airtight lateral seal at the front and rear positions of the article filled in the tubular film.

  In the invention which concerns on Claim 5, the said application | coating means arrange | positions to the film conveyance path | route to the superposition | polymerization position of the film in the said bag making means, and it is from the application position of the liquid sealing agent in an application means to a bag making means. The gist of the guide roller for the belt-like film provided in the film transport path is that it is a peripheral surface for winding and guiding the coating surface of the belt-like film except for the application site of the liquid sealant.

  In the invention according to claim 6, the vertical seal means includes a pair of seal bars, the seal bar is adjacent to the hermetic seal surface portion, the hermetic seal surface portion for hermetic seal extending with a required length, The gist of the present invention is that the seal surface is provided with a partial seal surface portion that forms an air passage.

  In the invention which concerns on Claim 7, the said application means makes an applicator a strip | belt-shaped film corresponding to the conveyance position of a strip | belt-shaped film so that the application | coating site | part of a liquid sealing agent may become the horizontal seal | sticker planned site | part vicinity with respect to the said cylindrical film. The gist is that it is configured to press.

  In the invention which concerns on Claim 8, the nonwoven fabric sealer in the said nonwoven fabric supply seal apparatus is located in the outer side of the cylindrical film guided along the periphery of the film guide cylinder inserted in the said bag making means, The gist is that the nonwoven fabric overlapping the inner surface of the cylindrical film is pressed from the outer side of the cylindrical film against the periphery of the film guide cylinder and sealed.

  In the invention according to claim 9, the vertical sealing means includes a pair of seal bars that sandwich the overlapping portion during the intermittent conveyance stop period of the film and applies a vertical seal, and the sealing bar overlaps the overlapping portion. And a partial seal surface portion that forms the air passage at the application site of the liquid sealant by the application means at a position excluding the overlapping clamping scheduled portion of the overlapping portion by the airtight seal surface portion. The gist is that the seal surface is formed.

  In the invention according to claim 10, the vertical seal means includes a pair of seal bars, and the seal bar sandwiches the outside of the inner base portion of the overlapping portion polymerized by the bag making means, and performs vertical seal. The gist is that a space can be formed between the inner base portion of the vertical seal portion and the nonwoven fabric facing the inner base portion of the vertical seal portion.

  In the invention which concerns on Claim 11, the said bag making means is provided with the slit which guides the superposition | polymerization part of the cylindrical film shape | molded cylindrically toward a film conveyance direction, and the nonwoven fabric sealer in the said nonwoven fabric supply seal apparatus is manufactured A non-woven fabric can be sealed at a symmetrical position across the overlapping portion inserted and guided by the slit at a downstream position of the bag means, and the vertical sealing means has a pair of seal bars downstream of the non-woven sealer. The gist is that the overlapping portion is sandwiched by being displaced to the left or right of the arrangement.

According to the first and fourth aspects of the invention, a packaged product having an air passage functioning as a one-way valve by filling the air passage in the vertical seal portion with a liquid sealant can be obtained. Thereby, a packaged product can be manufactured at a lower packaging cost than the conventional product with a separate gas vent valve attached.
According to the invention which concerns on Claim 2, the application | coating means of a liquid sealing agent can be arrange | positioned effectively using the empty space on a film conveyance path | route, an apparatus does not enlarge, and maintenance property can be made favorable. .
According to the invention which concerns on Claim 3 and 7, the ventilation path which functions as a one-way valve is arrange | positioned in the superposition part of a cylindrical film in the vicinity of the horizontal seal part of a packaged product. Thereby, for example, when a plurality of bags are accumulated and packed in a box, an air passage can be arranged in a space excluding a portion where bags overlap each other, and the air passage is pushed to release gas. A bag-packed product that is not hindered can be obtained.
According to the invention which concerns on Claim 5, it can prevent that the liquid sealing agent apply | coated to the film by the application means adheres to the other of a valve part.
According to the sixth aspect of the present invention, when a vertical seal is performed by sandwiching the overlapped portion with a seal bar, a vertical passage is formed by a partial seal surface portion provided on the seal bar. A packaged product having a one-way valve function can be obtained at the seal portion.
According to the invention which concerns on Claim 8, a nonwoven fabric can be pressed on a film guide pipe | tube, and it can seal in the state aligned with the film inner surface reliably.
According to the invention which concerns on Claim 9, the airtight vertical seal part provided with the ventilation path which has the function of a one-way valve can be reliably formed in the superposition | polymerization part.
According to the invention which concerns on Claim 10, the space which leads to the ventilation path of a vertical seal part is ensured, and the bagging goods which can perform discharge | release of gas smoothly from the whole inside of a bag can be obtained.
According to the invention which concerns on Claim 11, it seals so that a nonwoven fabric may straddle left-right asymmetrically with respect to the position of the inner base part of a vertical seal part, and gas is generated between a nonwoven fabric and the inner base part in a vertical seal part. Thus, when the inside of the bag is pressurized, the bag is swelled outward to ensure a gas release path as a large space, so that the gas in the bag can be released stably.

It is a schematic block diagram of the vertical bag making and filling machine concerning an Example. It is a principal part schematic plan view in the vertical bag making and filling machine which concerns on an Example. It is a schematic perspective view which shows the application means which concerns on an Example. It is a schematic front view in the vertical bag making and filling machine according to the example. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. 1 shows a seal bar of a vertical bag making and filling machine according to an embodiment, wherein (a) is a front view, (b) is a sectional view taken along the line CC of (a), and (c) is an enlarged partial seal surface portion. FIG. It is explanatory drawing which shows that there exists a location where a vertical seal overlaps in the superposition | polymerization part by the seal bar which concerns on an Example. It is a schematic perspective view which shows the bagging goods which concern on an Example. It is a front view which shows the bagging goods which concern on an Example from the formation side of a vertical seal part. It is a principal part schematic perspective view which crosses and shows the bagging goods which concern on an Example. The vertical bag-making filling machine which concerns on the example of a change is shown, Comprising: (a) is a principal part front view, (b) is the DD sectional view taken on the line of (a). It is a fragmentary explanatory sectional view showing the relation between the nonwoven fabric of the bag-packed product obtained by the vertical bag making and filling machine according to the modified example and the vertical seal portion.

  Next, the packaging method and apparatus according to the present invention will be described below with reference to the accompanying drawings by giving preferred examples.

  FIG. 1 shows a schematic configuration of a vertical bag making and filling machine (packaging machine) according to an embodiment, and FIGS. 9 to 11 show a bag-packed product M obtained by the packaging machine. The bag M is an article that generates gas until it is consumed, for example, a bag 10 filled with coffee powder ground coffee beans, and the bag 10 prevents oxidation of the coffee powder. It is filled with an inert gas such as nitrogen gas. As the material of the bag 10, for example, a gas barrier film having a thickness of about 40 μm and having a heat-welded layer of polyethylene or the like on the inner surface of a film obtained by vapor-depositing aluminum on a polyethylene terephthalate base material is preferably used.

  In the packaged product M, a longitudinal seal portion 14 having a predetermined width, which is formed by forming a belt-like film F into a cylindrical shape and overlapping both end edges in the longitudinal direction in a palm-like manner, extends along the bag body at the approximate center in the width direction. It is formed by bending. As shown in FIG. 9 or 10, the vertical seal portion 14 includes an airtight weld portion 14 a in which a film is heat-welded with a predetermined width along the vertical seal portion 14, and an air passage 16 between the inside and outside of the bag. A partially welded portion 14b that can be formed is formed. Moreover, the horizontal seal | sticker part 20 which cross | intersects the vertical seal | sticker part 14 in the both ends of the bagging goods M, and was heat-welded hermetically by predetermined width is formed across in a bag width direction, respectively.

  The bag-packed product M ensures the airtightness required for the airtight welded portion 14a and the lateral seal portion 20 of the vertical seal portion 14, and the bag inside and outside are connected only through the air passage 16 of the partial welded portion 14b. It is configured to be able to communicate. When the inner surface of the film is closed by silicone oil S as a liquid sealing agent and the inner pressure of the bag 10 rises above a predetermined value, the air passage 16 is a film formed by a liquid film of the silicone oil S on the inner surface of the film. It functions as a one-way valve that releases the air passage 16 by releasing the close contact of the inner surface. In addition, as shown in FIGS. 9 and 10, the partial weld portion 14 b is formed with a plurality of spot seals 22 in which the films are partially heat-welded with a gap in the longitudinal direction and the width direction of the vertical seal portion 14. The air passage 16 that connects the inside and the outside of the bag 10 is formed by a non-seal portion that is not spot-sealed. As described above, the liquid film of the silicone oil S is filled in the small passage divided by providing the plurality of spot seals 22, and the function of the one-way valve by the silicone oil S can be enhanced. The plurality of spot seals 22 are arranged in a staggered manner.

  Inside the packaged product M, a non-woven fabric 24 is disposed so as to straddle the inner base portion 14c of the vertical seal portion 14 in the width direction (short direction of the vertical seal portion 14) over the entire length of the vertical seal portion 14. Heat-welded. The inner base portion 14c of the vertical seal portion 14 is an end portion facing the bag inner side where the film inner surfaces are superposed when the films are welded. As a raw material of the nonwoven fabric 24, for example, a polypropylene sheet having a heat-welded layer of polyethylene or the like and having a thickness of about 64 μm is suitably used, and coffee powder that is an article filled in the bag is scattered outside. It is set to the roughness of the eyes that will not be allowed. The non-woven fabric 24 is heat-welded to the inner surface of the film on both sides sandwiching the inner base portion 14c of the vertical seal portion 14 as shown in FIG. 11 at both ends in the longitudinal direction extending along the vertical seal portion 14. 11 between the both side seal portions 20, 20 between the non-woven fabric 24 and the inner base portion 14c of the vertical seal portion 14). A space P communicating in the longitudinal direction is formed.

  As shown in FIG. 1, the packaging machine for manufacturing the packaged product M having the above-described form has a bag making means 34 disposed on the upper outer periphery of a film guide cylinder 32 arranged upright on a machine frame (not shown). The drawn strip-shaped film F is intermittently transported one packaging length at a time by the feeding means 36 including a pair of feeding rollers, and is guided to the bag making means 34 through a plurality of guide rollers 38 and 40.

  A registration mark sensor 42 that detects registration marks printed on the belt-like film F at a predetermined pitch is disposed in the film conveyance path to the bag making means 34. The belt-like film F supplied to the bag making means 34 is formed into a cylindrical shape by the bag making means 34 so that both end edges in the longitudinal direction are polymerized, and a polymerization position where the superposition part 12 is formed. A coating means 44 for applying a liquid sealing agent made of silicone oil S or the like to the belt-like film F is disposed in the film transport path of the belt-like film F leading up to the above. As shown in FIG. 3, the application means 44 includes an oil reservoir 72 in which the silicone oil S is infiltrated into the felt, an applicator 74 for applying oil to the belt-like film F, and the applicator 74 with the oil reservoir 72 and the belt shape. The applicator 74 moves between one edge of the film F, for example, an operating means 80 that combines two air cylinders 76 and 78 of up and down motion and horizontal motion, and the applicator 74 at the applicator position. And a receiving tool 45 for receiving the belt-like film F to which is pressed. The application means 44 is one edge portion along the longitudinal direction of the strip-shaped film F which is the inner side in the overlapping portion 12 based on the detection of the registration mark by the registration mark sensor 42, and a vertical seal described later. The applicator 74 is pressed against a portion corresponding to the partial weld portion 14b of the vertical seal portion 14 formed by the means 54 to apply a predetermined amount of the silicone oil S. In the embodiment, as the film is transported, the silicone oil S is applied to each of the two locations in the vicinity of the position where the cylindrical film Fa is laterally sealed, and at each predetermined timing. . The applicator 74 is positioned corresponding to the film length or film width for one package, and can be moved and adjusted in the direction along the film conveyance direction or in the film width direction in accordance with the change. It is configured as follows.

  A guide roller that is positioned in a film transport path from the position where the silicone oil S is applied to the belt-like film F by the coating means 44 to the bag making means 34, and on which the surface of the belt-like film F coated with the silicone oil S is wound and guided. As shown in FIG. 2, 40 is constituted by a short roller so that the application site of the silicone oil S in the belt-like film F is not wound.

  As shown in FIG. 4, a slit 34 a extending in the vertical direction along the film conveying direction is formed at the center position in the width direction of the bag making means 34, and the inner guide surface of the bag making means 34 and the film guide cylinder 32 are formed. The belt-like film F drawn into the gap between the two is formed into a cylindrical shape by being guided downward, and both longitudinal edges thereof protrude outwardly from the slit 34a and are polymerized in a palm shape. Are guided downward (see FIG. 2). Thus, the silicone oil S applied by the applying means 44 is located inside the overlapping portion 12 of the film guided by the slit 34a. Further, the tubular film Fa wound around the outer periphery of the film guide tube 32 and guided downward is sucked and held by a film transport means 46 including a pair of feed belts arranged opposite to each other with the film guide tube 32 interposed therebetween. It is intermittently conveyed downward every package.

  A non-woven fabric supply seal device 47 is provided for pulling out the tape-shaped non-woven fabric 24 from the non-woven fabric roll 30 supported above the bag making means 34 and heat-welding the inner surface of the tubular film Fa. The non-woven fabric supply sealing device 47 includes the slit 34a so that the non-woven fabric 24 drawn out from the non-woven fabric roll 30 is inside the cylindrical film Fa guided by being wound around the film guide tube 32 as shown in FIG. The nonwoven fabric 24 is drawn along the inner surface of the film straddling the inner base portion (the end portion facing the inner side of the bag where the overlapping portion 12 of the cylindrical film Fa begins to overlap) 12a that is guided by protruding from the inner side. Moreover, the nonwoven fabric 24 is arrange | positioned so that a left-right edge may become a left-right symmetric position on both sides of the superposition | polymerization part 12. FIG. As shown in FIGS. 4 and 5, a non-woven sealer 48 for heat-welding the non-woven fabric 24 is provided below the bag making means 34. The nonwoven fabric sealer 48 includes a pair of seal pieces 48a and 48a extending vertically at left and right positions sandwiching the overlapping portion 12 protruding outward of the tubular film Fa, and intermittently transporting the seal pieces 48a and 48a. At rest, the tubular film Fa and the non-woven fabric 24 drawn and guided along the inner surface of the tubular film Fa are operated to press against the peripheral surface of the film guide tube 32. As a result, the widthwise left and right sides 24a, 24a of the nonwoven fabric 24 at the position straddling the inner base portion 12a in the overlapping portion 12 of the tubular film Fa (the portions hatched on both sides sandwiching the vertical seal portion 14 in FIG. 11) are longitudinal. Heat-welded continuously in the direction. In addition, the length of the sealing piece 48a in the nonwoven fabric sealer 48 is set to be longer than one packaging length of the film, and the nonwoven fabric 24 is continuous without causing an unsealed portion in the conveyance direction of the tubular film Fa during intermittent conveyance of the film. Heat welding is performed. Further, the peripheral surface of the film guide tube 32 corresponding to the position where the seal piece 48a is pressed is provided with a seal receiving portion 32a formed on a flat surface.

  Below the nonwoven fabric sealer 48, as shown in FIGS. 4 and 6, a vertical seal means 54 comprising a pair of seal bars 50, 52 capable of sandwiching the overlapping portion 12 of the tubular film Fa is disposed, and intermittent film A vertical seal is applied to the overlapping portion 12 by sandwiching the overlapping portion 12 with the pair of seal bars 50 and 52 close to each other when the conveyance is stopped. As a result, the hermetic welded portion 14a and the partial welded portion 14b are formed in the vertical seal portion 14 of the obtained packaged product M. Here, as shown in FIG. 7, one seal surface of the pair of seal bars 50 and 52 forms a hermetic seal surface portion 56 for heat-sealing hermetically, and a seal bar 50 so as to form the air passage 16 in the partial weld portion 14b. Are formed by partial seal surface portions 58 and 58 provided so as to be adjacent to the hermetic seal surface portion 56 apart from each other in the longitudinal direction. The seal surface of the other seal bar 52 is formed as a flat surface. As shown in FIG. 7, the partial seal surface portion 58 includes a convex surface portion at the same level as the airtight seal surface portion 56 and is provided with a multi-seal piece 58 a that applies a plurality of spot seals within a predetermined range.

  The multi-seal piece 58a is a quadrangle having a length N of about 3 mm on one side, and is arranged so that the corners are directed in the width direction and the longitudinal direction of the seal bar 50. Each of the multi-seal pieces 58a is arranged in a staggered manner so that the air passage 16 of about 3 mm can be secured, and the gas released to the outside of the bag passes through the bent air passage 16 to the outside.

  The partial seal surface portions 58 are disposed at both ends in the longitudinal direction of the seal bar 50 that forms the air passage 16 in the vicinity of the lateral seal portion 20 of the bag M. Specifically, it is an inclined surface portion 10a extending in the thickness direction of the bag from the inner base portion (end portion on the bag body side) 20a of the lateral seal portion 20 provided at both ends of the bagged product M, and includes a plurality of bagged products. In the case where M is accumulated in the thickness direction, the partial seal surface portion 58 is formed so that the air passage 16 can be formed at an appropriate position corresponding to the void Z (see FIG. 9) formed between the adjacent bag-like products M. It is preferable to arrange.

  The length L of the seal bars 50 and 52 is set to be longer than one wrapping length. As shown in FIG. A double seal portion T is provided. And the formation position of the partial seal | sticker surface part 58 formed in the said seal bar 50 is set out of the duplication clamping plan site | part of the seal bar 50. As shown in FIG.

  As a filling means for filling the tubular film Fa with coffee powder, a filling cylinder 60 and an auger screw 68 provided in the filling cylinder 60 are provided. The filling cylinder 60 is concentrically arranged inside the film guide cylinder 32, and an auger screw 68 having a hopper 66 connected to an end extending upward from the bag making means 34 is inserted into the filling cylinder 60. By rotating, coffee powder is filled into the cylindrical film Fa by a predetermined amount from the filling cylinder 60 extending downward from the lower end of the film guide cylinder 32. Below the lower end of the filling cylinder 60, a horizontal sealing means 62 having a pair of sealing bodies 62a, 62a is disposed. Each time the cylindrical film Fa is conveyed for one package by the film conveying means 46, the horizontal sealing means 62 is formed together with the non-woven fabric 24 at a position where the air passage 16 is removed by both the sealing bodies 62a and 62a. While sandwiching Fa, an airtight lateral seal is applied in a direction intersecting the film conveyance direction, and the tubular film Fa is cut by a cutter 64 disposed on one seal body 62a. Thereby, the horizontal seal | sticker part 20 is formed in the up-and-down position (front-and-back position) of the coffee powder with which the cylindrical film Fa was filled, and the packaged goods M by which airtight sealing was carried out can be obtained.

  In the hollow portion formed between the film guide tube 32 and the filling tube 60, a pair of front and rear gas supply nozzles 70 extending from above the film guide tube 32 to the vicinity of the lower end of the filling tube 60 are disposed. . An inert gas such as nitrogen gas is discharged from the gas supply nozzle 70 to replace the oxygen in the tubular film Fa with the inert gas, thereby suppressing the oxidation of the coffee powder.

  Next, the operation of the packaging machine configured as described above will be described in relation to the packaging method.

  The belt-like film F drawn from the film roll 26 by the feeding means 36 is intermittently conveyed toward the bag making means 34. Based on the registration mark detection signal from the registration mark sensor 42, in the vicinity of the horizontal seal planned portion applied to the overlapping portion 12 at one edge portion along the longitudinal direction of the strip-shaped film F, and by the vertical sealing means 54 A predetermined amount of silicone oil S is applied to the portion where the partial weld 14b is to be formed by the applicator 74 of the applicator 44 (see FIG. 2). The belt-like film F to which the silicone oil S is applied is guided by a plurality of guide rollers 38 and 40 and supplied to the bag making means 34. As shown in FIG. 2, the guide roller 40 wound around the belt-like film F so that the application surface side of the silicone oil S is in contact is formed in a short length so that the silicone oil application portion does not contact. It does not adhere to the roller 40 and adhere outside the predetermined application site. Further, the coating means 44 can be arranged using the empty space in the film transport path leading to the bag making means 34, and the apparatus does not increase in size. In addition, the coating means 44 disposed in the film transport path does not have a complicated configuration, and the maintainability of the coating means 44 is improved. Further, when changing the size of the film length for one package or the width of the film used, it can be handled by moving and adjusting the application position of the silicone oil S by the applicator 74.

  The belt-like film F supplied to the bag-making means 34 is polymerized in the shape of a palm with both end edges in the longitudinal direction being polymerized so that the coated surface of the silicone oil S is inside, and the tubular film Fa Is guided downward while being wound around the outer periphery of the film guide tube 32, and its overlapping portion 12 is guided downward while protruding outward from the slit 34a.

  The coffee powder stored in the hopper 66 is filled into the tubular film Fa from the lower end opening of the filling cylinder 60 as the auger screw 68 rotates. Moreover, the inert gas discharged from the gas supply nozzles 70 replaces the oxygen in the tubular film Fa with the inert gas.

  As shown in FIG. 5, the non-woven fabric 24 drawn out from the non-woven fabric roll 30 has an inner base portion 12a of the overlapping portion 12 between the tubular film Fa formed by the bag making means 34 and the film guide tube 32. The left and right end edges are drawn downward so as to be arranged symmetrically across the overlapping portion 12 at the straddling position. When the intermittent conveyance of the tubular film Fa by the film conveying means 46 is stopped, the non-woven fabric sealer 48 operates so as to press the tubular film Fa against the film guide tube 32 from the outside, and the non-woven fabric 24 is formed on the inner surface of the tubular film Fa. Heat sealing is performed at the clamping portion between each seal piece 48 a of the sealer 48 and the film guide tube 32. Since the nonwoven fabric 24 is pressed together with the film against the seal receiving portion 32a formed of a flat surface formed on the film guide tube 32, the nonwoven fabric 24 is surely heated and welded and is favorably welded without being displaced on the inner surface of the film. .

  At the timing when the nonwoven fabric sealer 48 is moved away from the film guide tube 32, the film transport means 46 heats and welds the tubular film Fa to the inner surface of the tubular film Fa as it is intermittently transported downward by one package. The nonwoven fabric 24 is pulled out from the nonwoven fabric roll 30. Each time the intermittent conveyance of the film is stopped, the nonwoven fabric 24 is repeatedly heat-welded to the inner surface of the film by the nonwoven fabric sealer 48. Further, when intermittent conveyance of the tubular film Fa is stopped, the pair of seal bars 50 and 52 of the vertical seal means 54 sandwich the overlapping portion 12 superposed in the palm-like shape to perform vertical seal. Further, the upper and lower positions of the coffee powder filled in the tubular film Fa from the lower end of the filling tube 60 are sandwiched by the transverse sealing means 62, and the tubular film Fa is laterally sealed and cut. The non-woven fabric 24 is sealed inside the tubular film Fa to form a continuous band and is transported together with the tubular film Fa, and is sandwiched together with the tubular film Fa by the sealing bodies 62a and 62a of the lateral sealing means 62. As a result, in the vertical seal portion 14 formed along the longitudinal direction of the bag 10 and the horizontal seal portion 20 intersecting at both ends of the bag, the bag M can be obtained in which the nonwoven fabric 24 is sandwiched and heat-welded.

  The length dimension of the nonwoven fabric sealer 48 is set to be longer than the length of one wrapping film feed, and the nonwoven fabric 24 is heated and welded to the tubular film Fa at the start and end portions of one wrapping length. The nonwoven fabric 24 is continuously heat-welded without an unsealed portion in the film transport direction in the tubular film Fa. Therefore, the inner base portion 14c of the vertical seal portion 14 can be reliably covered so that the nonwoven fabric 24 straddles, and the coffee powder can be prevented from scattering from the vertical seal portion 14.

  At the time of vertical sealing by the vertical sealing means 54, the hermetic welded portion 14 a is formed on the vertical seal portion 14 of the bag 10 by the airtight seal surface portion 56 of the seal bar 50, and each application site of the silicone oil S is the partial seal. The partial welded portion 14b is formed by being sandwiched by the multi-seal pieces 58a of the surface portion 58 in a spot manner. Thereby, the ventilation path 16 having the function of a one-way valve can be formed in the vertical seal portion 14 of the bag 10. Further, as shown in FIG. 6, the pair of seal bars 50 and 52 sandwich the outer side from the inner base portion 12 a in the overlapping portion 12 protruding from the tubular film Fa and perform vertical sealing. Thereby, in the packaged product M, a space P communicating in the longitudinal direction between the lateral seal portions 20 and 20 is ensured between the inner base portion 14c of the vertical seal portion 14 and the nonwoven fabric 24 facing the longitudinal seal portion 14 ( (See FIG. 11).

  The length of the seal bars 50 and 52 is set to be longer than the length of one package of the film, and the overlap portion 12 is formed with a double seal portion T (overlapping sandwiched portion) to be heat-welded. Is done. As shown in FIG. 8, since the partial welded portion 14b formed by the application site of the silicone oil S and the vertical seal means 54 is set to a portion excluding the double seal portion T, a film is formed in the partial welded portion 14b. It is prevented that the whole is heat-welded. That is, it is possible to reliably form the air passage 16 provided with the hermetic welded portion 14a and the portion having the function of the one-way valve in the vertical seal portion 14 of the tubular film Fa.

  When the internal pressure rises above a predetermined value due to the gas generated from the coffee powder, the obtained packaged product M is in a closed state due to the close contact of the opposing surfaces of the film polymerized by the vertical seal portion 14 with the silicone oil S. The closing of the air passage 16 is released, and the gas is released to the outside through the air passage 16. Further, the inner base portion 14c of the vertical seal portion 14 is covered over the entire length by the nonwoven fabric 24 as shown in FIG. 9 or FIG.

  Since the vertical sealing means 54 and the horizontal sealing means 62 provide an airtight seal, the air passage 16 is closed with the silicone oil S when the internal pressure of the bag M is lower than a predetermined value. Is kept airtight. Therefore, it can be set as the packaged product M that can prevent the entry of air or the like from the outside. Further, even when the opening and closing of the air passage 16 is repeated, the closed state of the air passage 16 having the function of the one-way valve can be maintained by the silicone oil S.

  As described above, the packaged product M obtained by the packaging machine of the embodiment can be manufactured at a lower cost than the conventional product including the gas vent valve. In addition, it is possible to keep the device cost low with a very simple structure without providing a dedicated device for attaching the gas vent valve, and also to reduce the packaging material cost of the packaged product M having a one-way valve function. Can do.

  In the embodiment, as shown in FIG. 7 (c), the multi-seal pieces 58a of the partial seal surface portion 58 of the one seal bar 50 are arranged in a staggered manner. The air passage 16 to be formed is formed in a bent shape in the inner and outer directions of the bag 10 to prevent the gas in the bag from being released at once through the air passage 16 and the silicone oil S from being scattered outside the passage. it can. Further, the multi-seal pieces 58a in the partial seal surface portion 58 can be spotted with the spot seals 22 to suppress the flow of the silicone oil S and maintain the adhesion state of the film.

  Since the holding position of the overlapping portion 12 by the vertical sealing means 54 is set outside the inner base portion 12a in the overlapping portion 12, it is between the non-woven fabric 24 facing the inner base portion 14c of the vertical sealing portion 14 in the packaged product M. A sufficient space P can be formed as a gas discharge path, and gas discharge is not hindered.

  The ventilation path 16 in the vertical seal portion 14 is formed in the vicinity of the horizontal seal portions 20 and 20. That is, the air passage 16 is an inclined surface portion 10a extending in the thickness direction of the bag 10 from the inner base portion 20a of the lateral seal portion 20 provided at both ends of the bagged product M, as shown in FIG. In the case where M is accumulated in the thickness direction, it is formed at a position corresponding to a void Z formed between each adjacent bag M. Accordingly, the air passages of the adjacent bag-filled products M are not in close contact with each other, and the air passage 16 is closed, so that the release of gas in the bag is not hindered.

(Example of change)
The present invention can be modified as follows, for example, instead of the configuration of the embodiment.
(1) Instead of the vertical bag making and filling machine as the packaging machine mentioned in the embodiment, a horizontal bag making and filling machine can be adopted.
(2) In place of the liquid sealing agent application mode in the embodiment, for example, an operating mode in which an applicator made of felt or rubber material soaked with a liquid sealing agent is pressed against the film, or an applicator, oil is used. Various other embodiments, such as an impregnated transfer roller, can be employed. Further, the application position of the liquid sealing agent to the belt-like film F by the coating means 44 is, for example, a position guided by the film guide of the bag-making means 34, and the belt-like film F is polymerized by the bag-making means 34 from the film roll 26. What is necessary is just on the film conveyance path | route to a position.
(3) The applicator 44 is provided with a plurality of applicators on both sides or one side in the width direction of the belt-like film F corresponding to the packaging ability, and presses one of the applicators against the film every time the film is transported for one package. Then, an appropriate configuration such as applying a liquid sealing agent can be employed.
(4) The multi-seal piece 58a of various other shapes, such as a triangle and a round shape, can be adopted as the partial seal surface portion 58 in the embodiment. Further, the number of the multi-seal pieces 58a may be appropriately set according to the size of each multi-seal piece 58a, the setting range of the partial seal surface portion 58, and the like. Furthermore, the arrangement of the multi-seal pieces 58a is not limited to a staggered pattern, and various arrangements that form the air passage 16 bent by the unsealed portion can be adopted.
(5) Instead of the partial seal surface portion 58 provided with a plurality of multi-seal pieces 58a as in the embodiment, a seal bar having an appropriate partial seal surface portion that becomes a bent air passage 16 such as a crank shape or a maze shape is employed. Can do.
(6) In the embodiment, it is possible to adopt a configuration in which the partial seal surface portions 58 formed at two places on the seal bar 50 are used as one place where the air passage 16 is formed in the vicinity of only one of the horizontal seal portions 20 and three places. It may be formed as described above.
(7) The position of the slit 34a provided so as to be located in the center in the width direction of the bag making means 34 as in the embodiment may be provided so as to be offset from the center to either the left or right as necessary. Further, the slit 34a may be provided at a position displaced 90 degrees to the left or right of the bag making means 34 so that the vertical seal portion 14 of the obtained bag M is formed on one side end side.
(8) In the embodiment, the holding position of the overlapping portion 12 at the seal bar 50, 52 in the slit 34a of the bag making means 34 and the vertical sealing means 54 is aligned in the film conveying direction. For example, as shown in FIG. As described above, a configuration in which the holding position X of the seal bars 50 and 52 is shifted to the left or right by a predetermined amount K with respect to the position of the slit 34a (the arrangement center of the slit 34a is indicated by Y) can be employed. In the packaged product M obtained by this configuration, as shown in FIG. 13, both seal positions of the nonwoven fabric 24 are asymmetric with respect to the position of the inner base portion 14 c of the vertical seal portion 14. As a result, the packaged product M swells outward when the inside of the bag is pressurized by the generation of gas between the non-woven fabric 24 and the inner base portion 14c of the vertical seal portion 14, thereby providing a large space for the gas release path. P can be secured as P, and the gas in the bag can be stably released.
(9) The film may be continuously conveyed instead of intermittently conveying as in the embodiment. In that case, the application means 44 which can apply | coat a liquid sealing agent during the continuous conveyance of the strip | belt-shaped film F is employ | adopted suitably, or the film which faces the arrangement | positioning position of the application | coating means of a liquid sealing agent is made into a conveyance stop state, and a film | membrane Appropriate film feeding modes can be used without interrupting continuous conveyance. Also, the vertical sealing means 54 and the horizontal sealing means 62 may adopt various forms that can perform vertical sealing and horizontal sealing in conformity with the continuous film transfer form.
(10) In the embodiment, the guide roller 40 wound so that the application surface side of the liquid sealant in the belt-like film F is in contact with the liquid sealant application portion in the belt-like film F instead of the short roller. A roller having a small outer diameter can be employed.
(11) In the examples, coffee powder is used as the filled article. However, the present invention can correspond to coffee beans themselves and other various articles that generate gas during storage until the packaged product M is consumed. Moreover, what is necessary is just to employ | adopt the various filling means adapted to the property of the filling article.
(12) Instead of heat-welding the nonwoven fabric 24 to the film as in the embodiment, it may be sealed with an adhesive such as hot melt.
(13) In the examples, silicone oil was used as the liquid sealant to be applied to the film, but various sealants that act so as to open and close the air passage 16 of the partially welded portion 14b according to changes in the bag internal pressure were adopted. obtain.
The configuration described in the embodiment is not limited to the above-described modification example, and various other configurations can be adopted without departing from the gist of the present invention.

12 superposition part, 12a inner base part, 14 vertical seal part, 14c inner base part, 16 air passage 20 lateral seal part, 24 nonwoven fabric, 26 film roll (supply source),
32 Film guide tube, 34 bag making means, 34a slit, 40 guide roller 44 coating means, 46 film conveying means, 47 nonwoven fabric supply sealing device 48 nonwoven fabric sealer, 50 one seal bar, 52 other seal bar 54 vertical seal means, 56 Airtight seal face, 58 Partial seal face 60 Filling cylinder (filling means), 62 Lateral seal means, 68 Auger screw (filling means)
74 Applicator, F Strip film, Fa Tube film, M Packed product, P space S Silicone oil (liquid sealant), Z space

Claims (11)

A liquid sealing agent (S) is applied to the edge portion along the longitudinal direction of the strip film (F) drawn from the supply source (26) by the application means (44) every time the film for one package is conveyed. ,
The strip-shaped film (F) is formed into a cylindrical shape by the bag-making means (34) so that the application surface of the liquid sealing agent (S) is polymerized on the inner side of both end edges of the strip-shaped film (F), and a palm-shaped overlapping portion is formed. Forming (12),
In the tubular film (Fa), the non-woven fabric (24) is drawn and guided so as to straddle the inner base (12a) of the overlapping portion (12) in the tubular film (Fa), and overlaps the inner surface of the tubular film (Fa), and both sides of the inner base (12a). And continuously seal the nonwoven fabric (24) to the inner surface of the film,
On the downstream side where the nonwoven fabric (24) is conveyed together with the tubular film (Fa), the inside and outside of the tubular film (Fa) communicate with the application site of the liquid sealant (S) in the polymerization section (12). Leaving the air passage (16) to make an airtight vertical seal,
The tubular film (Fa) is sandwiched with the non-woven fabric (24) on both sides of the air passage (16), and an airtight transverse seal is applied in a direction intersecting the transport direction of the tubular film (Fa). A packaging method comprising: forming a lateral seal portion (20) at the front and rear positions of an article filled in a tubular film (Fa) to obtain a packaged product (M).   The liquid sealing agent (S) is applied to the belt-like film (F) by the coating means (44) in the film transport path leading to the polymerization position of the belt-like film (F) by the bag making means (34). The packaging method according to claim 1.   The ventilation path (16) is in the vicinity of the lateral seal portion (20), and in a space (Z) formed between adjacent bagging products when a plurality of bagging products (M) are stacked. The packaging method according to claim 1 or 2, wherein the packaging method is formed at a corresponding position. Bag-making means (34) for polymerizing the edge portions along the longitudinal direction of the belt-like film (F) into a palm shape and forming it into a cylindrical shape,
Along the longitudinal direction of the belt-like film (F) as the belt-like film (F) is transported in the film transport path upstream from the position where the belt-like film (F) is polymerized by the bag making means (34). Application means (44) for applying a liquid sealing agent (S) to the edge portion at predetermined intervals,
The non-woven fabric (24) is drawn so as to overlap the inner surface of the tubular film (Fa) in an arrangement straddling the inner base (12a) of the overlapping portion (12) of the tubular film (Fa) formed by the bag-making means (34). A non-woven fabric supply seal device (47) for guiding and sealing the non-woven fabric (24) to the film inner surface on both sides of the inner base (12a);
Filling means (60, 68) for filling the tubular film (Fa) with an article;
Film transport means (46) for transporting the tubular film (Fa) sealed with the nonwoven fabric (24),
The overlapping portion (12) is sandwiched between the overlapping portions (16) leaving the air passage (16) communicating the inside and outside of the tubular film (Fa) at a position corresponding to the application site of the liquid sealant (S). 12) vertical sealing means (54) for applying an airtight vertical seal;
The tubular film (Fa) is sandwiched with the non-woven fabric (24) at a position away from the air passage (16), and a transverse seal is provided at the front and back positions of the article filled in the tubular film (Fa). A packaging device comprising a sealing means (62).   The application means (44) is disposed in the film transport path up to the film polymerization position in the bag making means (34), and is manufactured from the application position of the liquid sealant (S) in the application means (44). The belt-like film (F) guide roller (40) provided in the film conveyance path to the bag means (34) winds and guides the application surface of the belt-like film (F) except for the application site of the liquid sealant (S). The packaging device according to claim 4, which is a peripheral surface.   The vertical seal means (54) includes a pair of seal bars (50, 52), and the seal bars (50, 52) include an air-tight seal surface portion (56) for an air-tight seal extending for a required length, The packaging device according to claim 4 or 5, wherein the packaging device is formed by a sealing surface provided with a partial sealing surface portion (58) adjacent to the airtight sealing surface portion (56) and forming the ventilation path (16).   The application means (44) is an applicator corresponding to the transport position of the strip film (F) so that the application site of the liquid sealant (S) is in the vicinity of the planned site of lateral sealing with respect to the tubular film (Fa). The packaging device according to any one of claims 4 to 6, wherein (74) is configured to press the belt-like film (F).   The non-woven sealer (48) in the non-woven fabric supply sealing device (47) is disposed outside the tubular film (Fa) guided along the periphery of the film guide tube (32) inserted in the bag making means (34). The non-woven fabric (24) that is disposed and overlaps the inner surface of the tubular film (Fa) in the overlapping portion (12) is pressed from the outside of the tubular film (Fa) against the periphery of the film guide tube (32). The packaging device according to any one of claims 4 to 7, which is configured to be sealed.   The vertical sealing means (54) is provided with a pair of seal bars (50, 52) that sandwich the overlapping portion (12) during the intermittent conveyance stop period of the film and performs vertical sealing, and the seal bars (50, 52 ) Is an air-tight seal surface portion (56) that overlaps and sandwiches the overlapping portion (12), and a position excluding the overlapping sandwich planned portion of the overlap portion (12) by the air-tight seal surface portion (56), and the application means ( The liquid sealant (S) according to any one of claims 4 to 8, wherein the liquid sealant (S) is applied with a seal surface provided with a partial seal surface portion (58) for forming the air passage (16). Packaging equipment.   The vertical seal means (54) includes a pair of seal bars (50, 52), and the seal bar (50, 52) is an inner base portion (12) in the overlapping portion (12) polymerized by the bag making means (34). 12a) The outer side is sandwiched between the outer sides, and the obtained vertical seal part (14) has an inner base part (14c) and a non-woven fabric (24) facing the inner base part (14c) of the vertical seal part (14). The packaging apparatus as described in any one of Claims 4-9 made into the structure which can form space (P) between.   The non-woven fabric supply sealing device (47) is provided with a slit (34a) for guiding the overlapping portion (12) of the tubular film (Fa) formed into a tubular shape toward the film conveying direction in the bag making means (34). The non-woven sealer (48) is provided so that the non-woven fabric (24) can be sealed at a symmetrical position across the overlapping portion (12) inserted and guided by the slit (34a) at the downstream position of the bag making means (34). The vertical sealing means (54) is configured to displace the pair of seal bars (50, 52) downstream of the nonwoven fabric sealer (48) to either the left or right with respect to the arrangement of the nonwoven fabric sealer (48). The packaging device according to any one of claims 4 to 10, wherein the packaging device is configured to sandwich the portion (12).

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