JP5426421B2 - Ear folding method and ear folding device for pillow package - Google Patents

Description

  The present invention relates to an ear-folding method and an ear-folding device for folding an ear part, which is an end-sealed part of a pillow package.

  As is well known, a pillow wrapping machine forms a tubular film by forming a belt-like film into a tubular shape through a bag making machine, and sealing the overlapped film polymerization ends with a center seal device. On the other hand, on the upstream side of the bag making machine, a product transporting and supplying device for supplying a product to be packaged into the bag making machine at predetermined intervals is arranged. The product is conveyed in a state of being arranged at equal intervals in the cylindrical film. Then, a pillow packaging body that encloses the product is manufactured by sealing and cutting the tubular film so as to cross the horizontal direction at predetermined intervals by an end seal device arranged on the carry-out side of the pillow packaging machine. The

  FIG. 1 shows an example of such a pillow package. The pillow package 1 wraps the product 2 with a cylindrical packaging film 3 and seals the packaging film 3 at an appropriate position. Specifically, the seal part includes a center seal part 4 (formed by a center seal device) that seals both side edges of the film along the cylindrical axial direction and seals the front and rear in the direction of travel in a horizontal direction. There is an ear portion 5 (formed by an end seal device (top seal device)).

  And there exists a request | requirement of wanting to bend this ear | edge part 5. FIG. This is because, as shown in the figure, the ear part 5 protrudes in the horizontal direction in a state where the normal packaging process is performed. Therefore, by bending the ear part 5, the outer shape of the package 1 is the product 2. For example, such a package (ear-folded) can be easily carried out when boxing, and can be stored using a small volume box. This is because it has merit. Further, by folding one ear part 5, the side where the ear part is bent may be a flat surface to be a bottom part, and the package may be able to stand up.

  In order to bend the ear portion 5, the end portion 5 which is end-sealed and separated from the tubular film independently of the end seal device or integrally with the end seal device is free. An ear fold device for performing a bending process is provided. As a packaging machine in which such an ear folding device is mounted, there is one disclosed in Patent Document 1 in the past.

  In the apparatus disclosed in Patent Document 1, the lower side of the ear part of the package with a gusset is held by a film holding plate, and then the folding roller is lowered to bend the ear part downward, and then the sealer is It is advanced from the side and the ear part is thermally bonded to the side surface of the package.

JP 2004-238065 A

  However, since the above-described ear folding device is configured to suppress the package body from the side when folding the ear portion, in the case where the packaged product to be stored is a soft product, it is pushed by the film pressing plate, Doing so will damage the product. For this reason, there are limitations on the properties, shapes, sizes, and the like of products that can be applied as packages, and there is a problem that versatility is not sufficiently ensured.

  In order to solve the above-described problems, a method for folding an ear of a pillow package according to the present invention is as follows. (1) The ear of the pillow package having an ear formed by end sealing in an end seal device. An ear folding method of bending the pillow package body by pressing the main body of the pillow package to move the gas inside the main body, thereby inflating the end of the main body on which the ear portion is formed, and expanding In this state, the ear portion is bent against the receiving member disposed outside the pillow packaging body to bend the ear portion, and the internal pressure of the main body may be reduced even when the main body is crushed. The product inside the main body was not pressed. When a place other than the ear portion of the pillow package (main body) is pressed, the gas in the main body moves inside, and the end portion where the ear portion is formed expands. Therefore, by arranging the receiving member on the expanding outside, the end portion (ear portion) is pressed against the receiving portion by the expansion, and the ear portion is bent. And since the bending of the ear part uses expansion due to the movement of gas inside the main body, excessive force is not applied to the product, and the product is damaged regardless of the type and material of the product. Is suppressed as much as possible. The bending direction of the ear can be arbitrarily set. For example, when the pressing direction is the up and down direction, as in the embodiment, the pressing may be performed from above and the ears may be bent downward, or the guide plate may be reversed to move upward. It can also be bent.

  (2) The both ends of the main body on which the ears are formed may be pressed by the receiving member and then pressed. The main body is pressed by the receiving member to increase the internal pressure, and can prevent the product from being pressed when pressed.

  (3) The receiving member may be provided with a heater and brazed by heating. The heated ear and body become soft and bends smoothly and cleanly. Thereafter, when cooled, the folded state is maintained.

  (4) It is good to perform the process which adhere | attaches or heat-welds the said ear | edge part pressed and bent by the said receiving member with respect to the said main body. (5) It is good to perform the process which connects the said ear | edge parts which were pressed and bent by the said receiving member with an adhesive member. If it does in this way, the bent ear | edge part can suppress spreading away from a main body.

  (6) It is good to perform the pre-processing which bends the ear | edge part to a guide member inward and supplies between the said receiving members with respect to the said pillow package body before supplying to the said receiving members. The ear portion can be more smoothly opposed to the receiving member in a desired posture, and the ear portion can be bent in a desired direction.

  (7) A crease is attached in advance to the portion of the main body where the ear portion is not formed along the ear portion and the pressing is performed, so that the main body package body is cornered along the crease. It is good to form a part. If it does in this way, as shown, for example in FIG. 6, it can also be made into the shape put into the tray, and it can bring about a high-class feeling, or can be made into the form with taste and interest.

  (8) An upper restraint belt means is provided above the transport means for transporting the pillow package, and the pressing is performed by sandwiching the pillow package between the upper restraint belt means and the transport means. It is good to. If it does in this way, an ear folding process can be performed, conveying a pillow package with a conveyance means, a high-speed process can be performed, and the number of processes per unit time can be made high. Of course, the pillow package may be moved intermittently and folded at an appropriate timing.

  (9) The pressing can be performed from above and / or from below. The pillow package conveyed from the horizontal pillow packaging machine is conveyed in a posture in which the ear portion protrudes sideways. For this reason, if the transport posture is kept as it is, the pressing direction may be the vertical direction. In addition, for example, when transported in the vertical direction as in a vertical pillow packaging machine, the ears also extend in the vertical direction, so the pressing direction may be horizontal.

  The ear fold device for carrying out each of the above methods can take various configurations as shown below. (10) An ear folding device that bends the ear portion of a pillow package body having an ear portion formed by end seal processing by an end seal device, and presses the main body of the pillow package body to By pressing the end portion of the main body in which the ear portion is formed, and the end portion expanded by being pressed by the pressing means, And a receiving member disposed outside the pillow package.

  (11) The receiving member may be provided with a heater. (12) Moreover, it is good to provide the heat welding means which heat-welds the bent said ear | edge part to the main body of the said pillow package. (13) A means for applying a thermosetting adhesive to the ear portion may be provided on the upstream side of the receiving member. (14) An adhesive member attaching means for attaching the adhesive member across the pair of bent ears may be provided on the downstream side of the receiving member.

  (15) A guide member may be provided on the upstream side of the receiving member to bend the inward portion inward to supply between the receiving members. (16) It is good to provide the conveyance means which conveys the said pillow package, and the upper holding | suppressing belt provided above the conveying means, and it is good for the said upper holding belt to comprise the said press means. By using the upper restraining belt, the pressing direction becomes the vertical direction. As in the embodiment, when the belt surface of the upper restraining belt 17 is inclined downward, it is pressed from above, but for example, by gradually raising the transport surface of the transport means, from below. It is also possible to press (towards upward).

  In the present invention, the ear can be reliably folded regardless of the nature, shape, size, etc. of the product, and the product is not damaged.

It is a figure which shows an example of a pillow package (before an ear fold). It is a figure which shows one suitable embodiment of this invention. It is a figure which shows another suitable embodiment of this invention. It is a figure which shows another suitable embodiment of this invention. It is a figure which shows another suitable embodiment of this invention. It is a figure which shows the pillow package body manufactured by another suitable embodiment of this invention.

  FIG. 2 shows an embodiment of an ear folding device for a pillow package according to the present invention. FIG. 2A shows a state in which the pillow package 10 containing the product 15 is being conveyed by the first conveyor 12 arranged on the carry-out side of the pillow packaging machine. As shown in the drawing, the pillow package 10 has a shape in which ears 11 are formed on the front and rear sides in the traveling direction. In the manufacturing process, the pillow package 10 is used to seal-cut a cylindrical film containing a product (packaged product) in a lateral direction with an end seal device while air is still present inside. A predetermined amount of air remains inside the package. In addition, there is a case where a nozzle for gas injection is arranged in the cylindrical film, and nitrogen gas or other inert gas is injected into the tip space of the cylindrical film to replace the internal air. However, a predetermined amount of gas is present inside the pillow package 10 together with the product. In the present invention, since the type of gas is not so much related, the “gas” is described as air used in a general pillow package 10 in the following description.

  The first transport conveyor device 12 may be a carry-out conveyor provided immediately after the end seal device of the pillow packaging machine, or may be provided further downstream of the carry-out conveyor. And although the specific illustration of a planar layout is abbreviate | omitted, the 2nd conveyance conveyor 13 from which the conveyance direction differs 90 degree | times is arrange | positioned in the downstream of this 1st conveyance conveyor 12. FIG. As a result, the package 10 is transported in a posture in which the ears 11 are positioned forward and backward on the first transport conveyor 12, but the ears 11 are positioned on both the left and right sides in the traveling direction on the second transport conveyor 13. It is conveyed with the posture to do. That is, FIG.2 (b) is the figure seen from the front or back side of the advancing direction, and the package 10 is conveyed in the direction orthogonal to a paper surface.

  The second conveyor 13 is, for example, a belt conveyor provided with an endless belt. FIGS. 2B, 2C, and 2D show the appropriate positions of the second conveyor 13 in order from the upstream side. It is a thing (front view: sectional drawing which abbreviate | omitted the internal mechanism).

  First, on the upstream side, guide plates 14 are arranged above the transport surface of the second transport conveyor 13 and on the left and right sides in the traveling direction. This guide plate 14 becomes an inclined plate arranged in an inverted C shape that opens outward as it goes upward, and guides both ears 11 of the package 10 so as to be bent downward. In the present embodiment, the lower tip 14 a of the guide plate 14 is disposed so as to enter the lower part of the package 10. Thereby, the ear | edge part 11 is bend | folded along the guide plate 14, and adjoins so that the surface of the package 10 may be followed.

  However, as shown in FIG. 2 (a), the guide plate 14 keeps the final bent state by directing the tip of the protruding ear portion 11 downward in a tensioned state in the horizontal direction. It is for supplying smoothly to the apparatus to process, and the ear | edge part 11 is not pressed against the package 10 (packaged object). Therefore, in the guide plate 14, the ear portion 11 is not completely folded, and the package 10 that has passed through the guide plate 14 tries to return the ear portion 11 separated from the guide plate 14. Spread (FIG. 2 (c)). Further, the upstream end on the entrance side is slightly widened between the pair of guide plates 14 so that the ear portion 11 bends smoothly. In addition, it is more preferable to provide a guide on the entrance side of the guide plate 14 so that the tip of the ear portion 11 faces downward, because the ear portion 11 is reliably bent downward. The guide plate 14 may have a shape that gradually changes the ear portion from a horizontal state to a bent state.

  On the downstream side of the guide plate 14, an upper holding belt 17 is disposed above the second transport conveyor 13, and heating plates 18 with built-in heaters are disposed on the left and right sides of the second transport conveyor 13. The upper restraint belt 17 is inclined such that the position of the belt surface is lowered downward on the front side in the traveling direction. As a result, the distance between the upper surface of the second conveyor 13 and the lower surface of the upper restraining belt 17 is gradually narrowed toward the front in the traveling direction, and as shown in FIG. A space is formed between the upper restraining belt 17 and the pillow packaging body 10, but the lower surface of the upper restraining belt 17 contacts the upper surface of the pillow packaging body 10 on the downstream side as shown in FIG. Then, the surface is pressed downward, and the pillow package 10 is slightly crushed. At this time, as described above, since air is present inside the pillow packaging body 10, the air pushed by the upper restraining belt 17 moves inside the pillow packaging body 10 outward in the lateral direction. Then, the pillow package 10 is deformed into a crushed state. At this time, the upper holding belt 17 does not press the product 15 through the film of the pillow package 10, and air exists between the upper space of the product 15 and the upper surface of the pillow package 10. ing. Thereby, the product 15 is not damaged.

  Similar to the guide plate 14, the heating plate 18 is arranged in an inclined shape so as to be located outward as it goes upward. As shown in FIG. 2 (c), when the pillow package 10 is not pressed by the upper holding belt 17, the pillow package 10 is not in contact with the upper holding belt 17. By being pressed, the end portion where the ear portion 11 is formed expands outward, and the ear portion 11 contacts the heating plate 18. And the ear part 11 is urged | biased toward the side surface of the heating plate 18 with the pressure of the crushed air by adjusting the internal pressure of the pillow package body 10 suitably. Therefore, the urging force that tries to move to the outside of the internal air presses the ear portion 11 against the heating plate 18. Therefore, the ear part 11 is firmly pressed and bent. And the force which bends the ear | edge part 11 is the internal pressure of the air in the pillow package 10, and while pressing the pillow package 10 with this upper restraining belt 17, a big force is applied to the product 15 inside. Since the product 15 is not added, even if the product 15 is soft or fragile and easily deformed / damaged, such as bread, the product 15 is not damaged and the original state can be maintained.

  Furthermore, in this embodiment, the part of the ear | edge part 11 bent by the heating board 18 is also heated, The said film part becomes soft and it will be in the state bent from the root part of the ear | edge part 11 more smoothly. And the pillow packaging body 10 which passed the heating plate 18 in the word cools the ear | edge part 11 and its peripheral part, and the ear | edge part 11 follows the lower surface of the pillow packaging body 10, as shown in FIG.2 (e). It clumps in posture. Therefore, the beautiful ear part 11 is bent.

  Further, the position of the belt surface on the lower side of the upper restraining belt 17 is high on the upstream side and is not in contact with the pillow packaging body 10 and is low on the downstream side so as to be in contact with the pillow packaging body 10, but is not necessarily over the entire length. They do not have to be on the same plane. That is, for example, if the belt surface is inclined downward on the upstream side and the belt surface comes into contact with the pillow package 10, or if the belt surface is pressed for a certain period of time, on the other hand, on the further downstream side, It may be a climbing slope that gradually rises. In short, it is only necessary that the pillow packaging body 10 can be lightly crushed by pressing the pillow packaging body 10 downward in a partial region of the upper restraining belt 17.

  Furthermore, the distance between the pair of heating plates 18 may be narrower than the lateral width of the pillow package 10 (the distance between the roots of the pair of ear portions 11). If it does in this way, after approaching the both ends in which the ear | edge part is formed inward with the heating plate 18, the pillow packaging body 10 will be pressed with the upper holding belt 17, and the product 15 and pillow before pressing will be carried out. Since the space / distance between the upper side of the package 10 is increased and the internal pressure is increased, the occurrence of damage to the product 15 when pressed by the upper holding belt 17 can be prevented as much as possible.

  FIG. 3 is a diagram showing a main part of another embodiment of the present invention. In this embodiment, as shown to Fig.3 (a), the adhesive application apparatus (application | coating of thermosetting adhesives, such as a hot melt, to the predetermined position upstream from the heating plate 18 of the 2nd conveyance conveyor 13 ( Nozzle) 22 is disposed, and a thermosetting adhesive is applied to the lower surface of the bent ear portion 11.

  When the ear 11 is heated and pressurized with the heating plate 18, the thermosetting adhesive is heated with the heating plate 18. As a result, the pillow packaging body 10 is crushed by the upper restraining belt 17, and the ear portion 11 is pressed against the pressure plate 18 by the internal pressure to be bent, and an adhesive treatment can be performed. Therefore, since the ear | edge part 11 is adhere | attached on the surface of the pillow wrapping body 10 with the said adhesive agent, the ear | edge part 11 does not open the pillow package body 10 which passed the heating board 18 after that.

  When a thermosetting adhesive is used as in the present embodiment, the ear bending due to the heating plate 18 and the thermal bonding process can be performed at the same time, which is preferable because the apparatus is simplified. There is no limitation, and after the ear portion is bent, the ear portion may be heat-welded to the main body of the pillow package. The welding sealer for heat welding may be provided on the downstream side of the heating plate 18, or, as shown in FIG. 4, a hole is provided in a part of the heating plate 18, and the welding sealer 21 is placed in the hole. It may be inserted and arranged, and the ear portion 11 may be bent by the heating plate 18 and thermally welded.

  Although not shown in the drawings, a guide plate may be provided in these embodiments as in the embodiment shown in FIG. Since other configurations and operational effects are the same as those of the above-described embodiment and modification, detailed description thereof is omitted.

  FIG. 5 shows yet another embodiment. In this embodiment, an adhesive tape attaching device 25 is provided on the downstream side of the heating plate 18 in the above embodiment, and the pair of bent ear portions 11 are connected with the adhesive tape 26. Thereby, even if it does not adhere | attach the ear | edge part 11 on the main body surface of the pillow package 10, it can prevent the ear | edge part 11 opening. The adhesive tape 26 may be printed with a quality indication. Since other configurations and operational effects are the same as those of the above-described embodiments and modifications, detailed description thereof is omitted.

  FIG. 6 shows a pillow package 10 manufactured in yet another embodiment. In this embodiment, a linear fold (folded line) 27 is provided in parallel along the ear portion 11 at a predetermined position of the main body of the pillow package 10. For example, in the pillow packaging machine body, the folding fold 27 is a film extending laterally in the vicinity of the end-sealed portion at predetermined intervals corresponding to the cut pitch with respect to the band-shaped film before being supplied to the bag making machine. This can be achieved by putting a crease.

  When the pillow wrapping body 10 thus folded is pressed against the upper restraining belt 17 toward the lower side of the hand, as described above, the pillow wrapping body 10 is crushed and the side peripheral edge bulges outward, and the ear portion In this case, if the folds 27 are formed, the film is bent at the folds 27. As a result, as shown in FIG. 6, it can be formed into a shape that contains a tray, giving a high-class feeling. Since other configurations and operational effects are the same as those of the above-described embodiments and modifications, detailed description thereof is omitted.

  In each of the above-described embodiments, the pillow packaging body 10 is transported in the horizontal direction by the second transport conveyor 13, and the belt surface of the upper restraining belt 17 is inclined downward so that it is pressed from above. However, it may be provided with an inclined surface that gradually rises as the transport surface of the second transport conveyor 13 goes forward in the traveling direction, and may be pushed upward from below and pressed against the pillow package 10. , You may combine both.

  In addition, in each of the above-described embodiments, the ear portion is bent below the main body of the pillow package 10, but may be bent upward. This can be dealt with by, for example, making the inclination of the guide plate 18 reverse (C-shaped) and arranging it on the upper side of the main body. In such a case, it is more preferable to press from the lower side to the upper side. However, even if the pressing is performed from the upper side as in the present embodiment, it can be dealt with only by changing the direction of the guide plate 18. In particular, when the center seal portion is located on the upper side using a reverse pillow wrapping machine, the bent ear portion can be positioned on the center seal portion side by folding the ear portion upward.

  In each of the above-described embodiments and modifications, the pillow packaging body 10 is continuously pressed by the second transport conveyor 13 while the pillow packaging body 10 is pressed to bend the ear portion. May be intermittently transported and the pillow member may be pressed by moving the pressing member downward from above while temporarily stopping.

  Furthermore, the present invention is not limited to the direction in which the pillow package 10 is transported in the horizontal direction. For example, the present invention is applicable to a case in which a pillow package manufactured like a vertical pillow packaging machine moves in the vertical direction. can do. In that case, the pressing direction may be the horizontal direction.

10 Pillow Packaging Machine 11 Ear 13 Second Conveyor 15 Product 17 Upper Retaining Belt (Pressing Means)
18 Heating plate (receiving member)
21 welding sealer 22 adhesive application device 27

Claims (16)

An ear folding method for folding the ear part of a pillow package having an ear part formed by end seal processing by an end seal device,
By pressing the main body of the pillow package and moving the gas inside the main body in a direction crossing the direction of the pressing, the end of the main body on which the ear is formed is expanded outward,
In the expanded state, the ear portion is bent against the receiving member disposed on the outside of the pillow package, thereby bending the ear portion.
The method for folding an ear of a pillow package is characterized in that the internal pressure of the main body is such that even if the main body is crushed when pressed, the product inside the main body is not pressed.   The method for folding an ear of a pillow package according to claim 1, wherein the pressing is performed after both end portions of the main body on which the ear portion is formed are moved inward by the receiving member.   The method for folding an ear of a pillow package according to claim 1 or 2, wherein the receiving member is provided with a heater and is brazed by heating.   The ear fold of the pillow package according to any one of claims 1 to 3, wherein a process of adhering or heat welding the ear part pressed against the receiving member and bent to the main body is performed. Method.   5. The method of folding an ear of a pillow package according to claim 1, wherein a process of connecting the ears that are pressed and bent by the receiving member with an adhesive member is performed.   6. The pretreatment before the supply to the receiving member is performed by pretreating the guide member with its ears bent inward and supplying between the receiving members. 6. The method of folding an ear of the pillow package according to claim 1.   A corner portion is formed in the main body packaging body along the crease by previously attaching a crease along the ear portion to a portion where the ear portion of the main body is not formed. The method for folding an ear of a pillow package according to any one of claims 1 to 6, wherein:   An upper restraint belt means is provided above the transport means for transporting the pillow package, and the pressing is performed by sandwiching the pillow package between the upper restraint belt means and the transport means. The method of folding an ear of a pillow package according to any one of claims 1 to 7.   9. The method for folding an ear of a pillow package according to any one of claims 1 to 8, wherein the pressing is performed from above and / or from below. An ear folding device that bends the ear portion of the pillow package including an ear portion that is formed by end sealing treatment by an end seal device,
A pressing means for inflating the end of the main body on which the ear portion is formed outward by pressing the main body of the pillow package and moving the gas inside the main body;
A receiving member disposed on the outside of the pillow packaging body, which presses the end that is pressed and expanded by the pressing means;
An ear folding device for a pillow package, comprising:   The pillow folding body folding device according to claim 10, wherein the receiving member is provided with a heater.   The ear folding device for a pillow package according to claim 10 or 11, further comprising heat welding means for thermally welding the bent ear portion to the main body of the pillow package.   The ear folding device for a pillow package according to claim 11, wherein means for applying a thermosetting adhesive to the ear portion is provided upstream of the receiving member.   The pillow according to any one of claims 10 to 13, wherein an adhesive member attaching means for attaching the adhesive member across a pair of bent ears is provided on the downstream side of the receiving member. Ear folding device for packaging.   The pillow packaging body according to any one of claims 10 to 14, wherein a guide member is provided on the upstream side of the receiving member to be bent inwardly and to be supplied between the receiving members. Ear folding device. Conveying means for conveying the pillow package;
An upper holding belt provided above the conveying means,
The ear folding device for a pillow package according to any one of claims 10 to 15, wherein the upper restraining belt constitutes the pressing means.

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