JP4524366B2 - Packaging machine for double packaging sheet - Google Patents

Description

  The present invention relates to a packaging machine for packaging sheet food such as seaweed and forming a double packaging sheet enclosing the food.

  When the double wrapping sheet formed by this type of wrapping machine encloses seaweed as a sheet-like food, the double wrapping sheet is used for hand-packed packaging. In this way, if the seaweed is enclosed in the double packaging sheet, the seaweed will not be in direct contact with the handgrip even if the handgrip is wrapped in the double packaging sheet. Therefore, the seaweed does not absorb the moisture of the handfuls, and the handmade package can prevent the seaweeds from getting wet until the double packaging sheet is opened.

Specifically, the double wrapping sheet for handgrips has a double structure of an outer film and an inner film, and nori is sandwiched between these films, so that the seaweed is wrapped around the handgrip. Can be wrapped.
When the outer film is broken at the time of opening the above-described hand-wrapped package, the inner film is divided into left and right with respect to the hand-holding, and for the first time at this point, the seaweed is directly wrapped around the hand-holding.

In order to enable the division of the inner film described above, the inner film has one side edge of a pair of film halves overlapped with each other, and the pair of film halves are welded so as to be separable at this overlapping portion. (See FIG. 5 of Patent Document 1).
JP 2004-345695 A

  However, in the case of the laver packaging machine disclosed in Patent Document 1, that is, the packaging machine that forms a double packaging sheet enclosing the seaweed, the inner web for forming the inner film is formed by connecting one side edges of each other. It consists of a pair of web halves superimposed on each other, and these web halves are laminated on the outer web for forming the outer film with seaweed interposed therebetween, so that the overlapping portions of the web halves can be separated. It is welded, that is, heat sealed.

For this reason, when heat sealing is performed on the overlapped portion of the web halves, the sealing pressure and heat are applied to the laver, thereby degrading the quality of the laver.
The present invention has been made on the basis of the above-described circumstances, and its object is to provide a double packaging sheet capable of forming a double packaging sheet while avoiding deterioration of the sheet-like food enclosed therein. Is to provide a packaging machine for.

  Another object of the present invention is to provide a packaging machine for a double packaging sheet that can ensure good packaging quality of the double packaging sheet.

  In order to achieve the above-described object, the packaging machine of the present invention (Claim 1) has a food conveying path for intermittently conveying sheet-like food, and a terminal end of the food conveying path as a collective end. The outer web transport path that transports the outer web that can be welded toward the end of the food, and the outer web on the surface of the food, and the inner web that can be welded toward the end of the transport. An inner web transport path for overlapping the inner web on the back surface of the inner web, thereby forming an aggregate web in which food is sandwiched between the outer web and the inner web from the end of the assembly, A molding line that extends from the end and receives and conveys the collective web, a surrounding seal device that is provided in the molding line and welds the outer web and the inner web to each other so as to surround individual foods in the process of conveying the collective web, and molding line Provided located downstream of the surrounding sealer, a set web is cut at predetermined intervals, and a cutting device for forming a double wrapping sheet encapsulating individual food.

  In the case of the packaging machine according to claim 1, the inner web transport path includes a first transport path for transporting one web half forming the inner web, and a terminal end of the first transport path as a merging end. A second transfer path for transferring the other web half to be formed, wherein a joining web having an overlapping portion in which one side edges of both web halves are overlapped with each other from the joining end is formed; A path, a third transfer path extending from the merging end to the gathering end, and transferring the merging web, and provided in the third transfer path so that the overlapping portion of the merging web is continuous and separable in the transfer direction of the merging web And a joining device for welding and forming an inner web.

According to the packaging machine described above, since the overlapping portion of the joining web is welded, that is, heat-sealed, before the aggregate web sandwiching the food is formed, the sealing pressure and heat at the time of this heat sealing are applied to the food. There is no participation.
Preferably, the coupling device includes a receiving roller that guides the transfer of the merging web, a heat roller that sandwiches the overlapping portion of the merging web between the receiving roller and performs welding on the overlapping portion, The front and rear winding rollers are arranged respectively before and after the receiving roller in the web transfer direction and guide the transfer of the joining web so as to increase the winding angle of the joining web with respect to the receiving roller.

  According to the coupling device of claim 2, since the winding angle of the merging web with respect to the receiving roller, that is, the wrapping angle of the overlapping portion is large, the overlapping portion is stably supported by the receiving roller when the merging web is transferred. The overlapping portion is welded by the heat roller without passing in the width direction at one side edge of the web half that forms the overlapping portion while passing through the receiving roller.

  Specifically, the double wrapping sheet is used for wrapping a nigiri that contains seaweed as a food. Nori is sandwiched between the inner and outer films. In such a double packaging sheet, it is preferable that the outer film has an opening knob for opening.

In this case, the packaging machine is provided in the outer web conveyance path, and divides the outer web along the conveyance direction, and when the collective web is formed, the pair of the wrapping webs are arranged so as to sandwich the overlapping portion from both sides. A cutting device that forms parallel slits, a sticking roller that is provided downstream of the cutting device in the outer web transport path, guides the transport of the outer web after cutting, and a pair of adhesive tapes toward the sticking roller Supplying and sticking adhesive tape to the outer web to cover each slit on the outer roller, and an adhesive tape supply device located on the outer web transport path located downstream of the pasting roller, opened on the outer web A cut forming device that forms a cut between the pair of adhesive tapes at a predetermined interval in the conveying direction of the outer web and a third transfer path. To position the cut of the outer web to the inside thereof when but formed, the perforations can comprise a punching device to form at a predetermined interval in the transport direction, and, of claim 1 packaging machine Is further provided with an opening edge sealing device that is provided in the third transfer path and forms an opening edge seal to be positioned in the vicinity of the opening edge of the punched hole that is removed from the welding with respect to the overlapping portion.

  In the case of a wrapping handgrip that has been wrapped in the above-mentioned double wrapping sheet, when opening the grip, pull down the gripped opening knob along the adhesive tape to break the outer film of the double wrapping sheet from the pair of slits. can do. At this time, if the opening knob is overlapped with the inner film, the opening knob is pulled down, that is, the outer film cannot be broken.In order to avoid such overlapping, the inner web serving as the inner film, That is, a punched hole is formed in the joining web.

  Since such a punched hole must be larger than the unsealed portion, it is formed across a pair of adhesive tapes and divides the above-described overlapping portion of the joining web. For this reason, the web half body may bend at the dividing edge of the overlapped portion by the punched hole. However, the above-described opening edge seal device forms an opening edge seal in the vicinity of the opening edge of the punched hole, and this opening edge seal prevents the above described web half from being bent at the overlapping portion.

Furthermore, the packaging machine of the present invention is provided on the outer web conveyance path in front and rear of the affixing roller as viewed in the outer web conveyance direction, and guides the conveyance of the outer web to increase the winding angle of the outer web with respect to the affixing roller. Front and rear winding rollers can be further provided (claim 3 ). In this case, even if the outer web is divided by the cutting device upstream of the application roller, the application roller stably guides the conveyance of the outer web after the division. Therefore, there is no position shift between the slit of the outer web and the adhesive tape on the application roller, and the adhesive tape is applied to the outer web so as to reliably cover the slit.

In the packaging machine according to claim 1, since the overlapped portion of both web halves is welded to form the inner web before the sheet-like food is sandwiched between the outer web and the inner web, No seal pressure or heat is applied to the food, and therefore the quality of the food can be improved as a result of preventing the food from being deteriorated.
The packaging machine according to claim 2 or 3 is capable of forming the inner film and the outer film accurately and stably with respect to the inner and outer films of the double packaging sheet enclosing the food. Can also be improved.

FIG. 1 shows a packaging machine that forms a double wrapping sheet for a handful.
The packaging machine includes a food conveyance path 2 extending horizontally, and the food conveyance path 2 includes a pusher type conveyor 4. The conveyer 4 is along the food conveyance path 2 and can intermittently convey the laver N as a sheet-like food from left to right as viewed in FIG.
The food transport path 2 has a collective end 6 composed of a pair of pinch rollers at its end (right end), and an outer web transport path 8 extends toward the collective end 6. The outer web conveyance path 8 is disposed substantially above the food conveyance path 2 and is composed of a large number of guide rollers. Outer web transporting path 8 guides the weldable outer web W _A fed out from the roll R _0, leads to the outer web W _A until the collected end 6. Incidentally, the outer web W _A is to form the outer film of the double package sheet.

A dividing device 10 is disposed in the middle of the outer web conveyance path 8. The cutting apparatus 10 includes a receiving roller 10a for guiding the conveyance of the outer web W _A, 2 pieces of circumferential grooves are formed on the outer peripheral surface of the receiving roller 10a. A pair of cutting knives 10b are disposed in the vicinity of the receiving roller 10a, and the cutting knives 10b have cutting edges that enter into the circumferential groove of the receiving roller 10a. Therefore, when the outer web W _A passes through the guide roller 10a of the cutting device 10, cutting knife 10b of the cutting apparatus 10 is a widthwise central portion of the outer web W _A divided by presence of predetermined width, thereby, outer web W _a is divided into three web portions by two parallel slits.

On the other hand, a pair of rolls _RT is disposed in the vicinity of the cutting device 10. From these rolls _RT , the adhesive tape T is fed out through a dancer roller and a number of guide rollers, respectively, and is guided to the outer web conveyance path 8 located downstream of the cutting device 10, that is, the pasting roller 12.
When the outer web W _A and a pair of adhesive tape T passes the joining roller 12, the pair of adhesive tape T to the outer web W _A in the split state, affixed to cover the corresponding slit, thereby, in shed outer web W _A, its adjacent web portions are each other coupled by the adhesive tape T, as a result, the outer web W _A is integrated again.

Further, a cut forming device 14 is disposed in the outer web conveyance path 8 downstream of the sticking roller 12. The cut forming device 14 is composed of a receiving roller 14a for guiding the conveyance of the outer web W _A, and arranged rotatable bladed roller 14b as rolling contact with the receiving roller 14a. Passes between the outer web W _A is receiving roller 14a and bladed roller 14b, bladed roller 14b whereas the outer web W _A, to form a cut at a predetermined interval in the conveying direction, cut The interval corresponds to the length of the double packaging sheet. Here, cut for example a convex arc shape toward the conveying direction of the outer web W _A, at the center of the outer web W _A, it is positioned so as to straddle on the pair of adhesive tape T.

Process flow described above with respect to the outer web W _A is more apparent by reference to FIG. In Figure 2, shows (a), (b), (c) the outer web _{W A} towards the cutting device 10, the split positions of the outer web _{W A,} the attaching position of the adhesive tape T to the outer web _{W A} respectively.
Further, an inner web conveyance path 16 extends from the collective end 6 of the food conveyance path 2 described above, and the inner web conveyance path 16 is also composed of a large number of guide rollers like the outer web conveyance path 8. The upstream portion of the inner web conveyance path 16 is bifurcated at a merging end 18 composed of a merging roller, and the upstream branch conveyance path is connected to the rolls R ₁ and R ₂ as first and second transfer paths 20 and 22, respectively. Has been. A third transfer path 24 is formed between the joining end 18 and the collecting end 6.

From the rolls R ₁ and R ₂ , weldable web halves W ₁ and W ₂ for forming the inner web are respectively fed out through dancer rollers, and the web halves W ₁ and W ₂ reach the joining end 18. Led. The inner web forms the inner film of the double packaging sheet described above.
The first transfer path 20 is disposed folded guide 26 and point seal device 28 from the roll R ₁ side sequentially folding guide 26 when the web halves W ₁ passes, one side edge of the web halves W ₁ Is folded while being guided in the transfer direction, and a folded portion is formed in the web half W ₁ . Thereafter, when the folded portion of the web half W ₁ passes through the point seal device 28, the point seal device 28 welds the folded portion of the web half W _{1 at} a predetermined interval in the transfer direction. Seals are formed periodically. Specifically, the point seal device 28 guides the transfer of the web half W ₁ and has a rubber rotatable receiving roller 28a having an eccentric outer peripheral surface, and the rotation of the receiving roller 28a, and a heater block 28b which has a projection abutting through the folded portion of the web halves W ₁ on the outer peripheral surface, the folded portion of the web halves W ₁ between the projections and the receiving roller 28a of the heater block 28b is When sandwiched, the above-mentioned weld is partially formed in the folded portion.

Thereafter, the web halves W ₁ and W ₂ merge at the merging end 18 to become a merging web W ₃ , and this merging web W ₃ is connected to the folded portion of the web half W ₁ and one side of the web half W ₂ . It has an overlapping portion where the edges overlap each other. Note that the back surfaces of the web halves W ₁ and W ₂ are in contact with each other at the overlapping portion.
The third transfer path 24 opening edge sealing device 30 from the confluent end 18 side, a coupling device 32 and the punching device 34 are sequentially disposed, these devices 30, 32, 34 merge web _{W 3} passes.

Opening edge sealing device 30 with respect to overlapping portions of the joining web W _3, to form the opening edge seal at a predetermined interval in the transport direction, and, coupling device 32 in the overlapping part of the joining web W ₃ the seal line is formed, this seal line is welded a continuous and separably overlapping portions in the transport direction, the inner web W _B are formed at this point.
The flow of processing for the web halves W ₁ and W ₂ described above will become more apparent with reference to FIG. 3 (a) is folded on one side edge of the web halves _{W 1,} FIG. 3 (b) point seal to the folded portion, FIG. 3 (c) web halves _W 1, _{W 2} consists merging the web _{W 3} formation of, and, FIG. 3 (d) shows the inner web W _B after opening edge seal and the seal lines are formed.

The details of the opening edge sealing device 30 and the coupling device 32 will be described later.
Punching device 34 is composed of a receiving roller 34a to guide the feeding of the inner web W _B, and arranged bladed roller 34b in contact rolling through the inner web W _B to the receiving roller 34a, the inner web W _B passes between the can receiving roller 34a and bladed roller 34b, bladed roller 34b is intermittently formed a hole punched in the center of the inner web W _B. These perforations are arranged at a predetermined interval in the transport direction of the inner web W _B, these perforations are those corresponding to the break of the outer web W _A as will become apparent from the following description.

Incidentally, the punched piece of the inner web W _B obtained by forming the perforations is held by suction by the suction on the outer circumferential surface of the receiving roller 34a, and at eliminating the position of the receiving roller 34a, the outer peripheral surface of the receiving by blow pressure roller 34a Excluded from.
Laver N described above to the set end 6, the outer web W _A and the inner web W _B are supplied, seaweed N is sandwiched between the outer web W _A and the inner web W _B, at this point, it sets the web W _C is formed. The configuration of the set web W _C is shown in Figure 4, the aforementioned overlapping portions of the inner web W _B As is apparent from FIG. 4 is positioned between a pair of adhesive tape T of the outer web W _A.

As shown in FIG. 1, a molding line 36 is disposed on the opposite side of the food conveyance path 2 across the collecting end 6. The forming line 36 is connected to the food conveying path 2 and the discharge conveyor 38, conveys the set web W _C that is formed by the collected end 6 to the discharge conveyor 38.
The molding line 36, lateral sealing device 40 from the set end 6 side, the vertical sealing apparatus 42, a pair of feed rollers 44 and cutting device 46 for conveying the aggregate web W _C are sequentially disposed. When the collective web W _C passes through the horizontal seal device 40 and the vertical seal device 42, the horizontal seal device 40 intermittently forms a horizontal seal before and after the seaweed N with respect to the collective web W _{C in} the conveying direction, and , the vertical sealing device 42 for a set web W _C, to form a pair of longitudinal seals successive sides of laver N in the transport direction, these horizontal sealing and vertical sealing the mutual outer web W _a and the inner web W _B Glue.

Therefore, seaweed N of the set web W _C is that is surrounded by the lateral seals and the longitudinal seals in a state of being enclosed between the outer web W _A and the inner web W _B. Therefore, the lateral sealing device 40 and a longitudinal sealing device 42 described above constitute a surrounding sealing device for the set web W _C.
The horizontal sealing device 40 and the vertical sealing device 42 are composed of a receiving roller and a heater roller arranged with the molding line 36 interposed therebetween, and a seal pattern for forming the horizontal seal and the vertical seal described above is formed on the outer peripheral surface of the heater roller. Is formed.

Thereafter, when the collective web W _C passes through the cutting device 46, the cutting device 46 cuts the collective web W _C at a predetermined interval as seen in the conveying direction, and thereby, a grip with seaweed N sealed therein A double packaging sheet for is formed. The cutting device 46 also has a fixed blade 46a and a movable blade 46b arranged with the molding line sandwiched between them, and the movable blade 46b is attached to the outer peripheral surface of the roller 47c.

The formed double packaging sheet is supplied from the molding line 36 to the discharge conveyor 38 and is discharged by the discharge conveyor 38.
Upon forming the double package sheet described above, overlapping portions of the inner web W _B is from being welded at the stage before the set web W _C in the collected end 6 is formed, wherein the sealing pressure by welding Ya Seal heat is not applied to the seaweed N. Therefore, when the double wrapping sheet is formed, the seaweed N is not deteriorated, and the quality of the seaweed N can be maintained high.

Figure 5 is a view of the double package sheet from the inner web W _B side, in FIG. 5, reference numeral A~E the point seal described above, the opening edge seal, wavy seal line, the lateral sealing and longitudinal sealing Each is shown. In FIG. 5, reference numeral F ₁ denotes an opening knob portion that protrudes from the upper edge of the double package sheet, the opening knob portion F ₁ is set by the cut forming device 14 according to the outer web W _A break between the cutting device 46 formed by cleavage of the web W _C. Incidentally, the double packing sheet has an arcuate cutout F ₂ corresponding to the opening tab portion F ₁ to its lower edge.

Further, in FIG. 5, reference numeral _G 1, _{G 2} represents a half of the perforations of the web _{W B} among formed by punching apparatus 34 out each half _G 1, _{G 2,} these perforations are set cleavage of the web W _C, is separated in the middle of the upper edge and lower edge of the double package sheet.
As is clear from FIG. 5, the punched hole is formed so as to locate the cut forming the opening knob F ₁ , and therefore the punched hole is a seal line C existing in the pair of adhesive tapes T, that is, It is dividing the overlapping portion of the inner web W _B.

Referring to FIG. 6, which clearly shows that perforations (G _{1, G 2)} is intended to separate the overlapping portion of the inner web W _B, and FIG. 6 the seal line C inner web disposed on one side edge of the overlapping portion in the W _B, and shows that the opening edge seal B is disposed on the other side edge of the overlapping portions.
Furthermore, the opening edge seal B As is apparent from the foregoing description, with respect overlapping portion of the inner web W _B, in the vicinity of the opening edge of the perforations (G _{1, G 2)} As is apparent from FIG. 6 It is positioned.

Perforations 2 of the opening edge seal B sandwiching the _(G 1, _{G 2),} even overlapping portion of the inner web _{W B} is divided by the formation of the hole _(G 1, _{G 2)} punched in divided end The web halves W ₁ and W ₂ can be prevented from twisting, and the quality of the double packaging sheet can be improved.
Next, details of the opening edge sealing device 30 and the coupling device 32 described above will be described below.
FIG. 7 shows an enlarged view of the opening edge sealing device 30 and the coupling device 32 of FIG. Since these devices 30 and 32 have the same configuration, the coupling device 32 will be described first.

Coupling device 32 has a rubber receiving roller 48 on the lower side of the third transport path 24, the receiving roller 48 is rotatably supported, guide the feeding of the merging web W _3. When viewed in the transfer direction of the joining web W ₃ , winding rollers 50 are respectively arranged before and after the receiving roller 48, and these winding rollers 50 join to increase the winding angle of the joining web W ₃ with respect to the receiving roller 48. to guide the transfer of the web _{W 3.}

As is apparent from FIG. 8, both ends of the roller shafts of the receiving roller 48 and the front and rear winding rollers 50 are rotatably supported by a common roller holder 52. The roller holder 52 includes a pair of rotating brackets 54 disposed along both sides of the third transfer path 24 and a rotating shaft 56 that connects the base ends of the rotating brackets 54 to each other. 56 are rotatably supported by left and right path frames 58 extending along both sides of the third transfer path 24.

Further, the tip of the piston rod of the turning cylinder 60 is connected to the tip of the turning bracket 54 located on the front side in FIG. 7, and the turning cylinder 60 extends in the vertical direction, and the upper end of the cylinder body is The path frame 58 is rotatably supported via a bearing.
Therefore, when the rotating cylinder 60 is extended from the state shown in FIG. 7, the roller holder 52 rotates clockwise about the rotating shaft 56, whereby the receiving roller 48 and the front and rear winding rollers 50 are moved. Both are displaced downward from the operating position.

When the roller holder 52 is in the position shown in FIG. 7, the front rotation bracket 54 is in contact with the stopper bolt 62, and the stopper bolt 62 is a side block protruding sideways from the path frame 58. 64 is screwed.
When in the operating position shown in FIG. 7, the heat roller 66 is disposed immediately above the receiving roller 48, and the joining web W ₃ can pass between the heat roller 66 and the receiving roller 48. As is apparent from FIG. 9, both ends of the roller shaft of the heat roller 66 are rotatably supported by the left and right path frames 58 via bearings 68, and one end of the roller axis is from the back path frame 58 as viewed in FIG. The drive sprocket 70 is attached to the protruding end. Therefore, when the driving force is transmitted to the driving sprocket 70, the heat roller 66 is rotated clockwise as viewed in FIG.

  The heat roller 66 has a built-in temperature sensor such as a heater and a thermocouple. For electrical connection to the heater and the temperature sensor, the other end of the roller shaft has a pipe shape with both ends open, and a path frame on the near side. It protrudes outside 58. Therefore, a power supply line to the heater and a signal line from the temperature sensor can be arranged through the other end portion of the roller shaft, and an electrical connection to the power supply line and the signal line is a slip ring 72 attached to the other end of the roller shaft. , 74.

Further, a sealer ring 76 is attached to the outer peripheral surface of the heat roller 66, and the outer peripheral surface of the sealer ring 76 has corrugated sealer protrusions extending continuously in the circumferential direction. Thus, merging when the web W ₃ is passed through the coupling device 32 described above, overlapping part of the joining web W ₃ is sandwiched between the receiving roller 48 and the sealer ring 76, above the overlapping portion of the converging web W ₃ The sealed line C is formed.

Around the receiving roller 48 as described above are arranged winding roller 50, respectively, as these winding roller 50 increases the winding angle of the converging web W ₃ for receiving roller 48, the superposition of merging the web W ₃ The portion can pass through the heat roller 66 while being well supported by the outer peripheral surface of the receiving roller 48. As a result, no slack is generated in the overlapping portion of the merging web W ₃ , so that the overlapping portion can be stably sandwiched between the sealer ring 76 and the receiving roller 48 and the overlapping portion is sealed. The line C can be reliably and neatly formed, which greatly contributes to improving the quality of the double packaging sheet.

The opening edge sealing device 30 is different from the above-described coupling device 32 only in the sealer ring 76 of the heat roller 66. Therefore, the members and parts similar to the coupling device 32 in FIGS. Are denoted by the same reference numerals, and description thereof is omitted.
Viewed in the transport direction of the confluent web W _3, although the winding roller 50 in the front and rear of the receiving roller 48 of the opening edge seal device 30 is arranged, the winding roller 50 on the upstream side forms a converging end 18 described above It also serves as a confluence roller.

Further, a sealer ring 78 is attached to the outer peripheral surface of the heat roller 66 of the opening edge seal device 30, and this sealer ring 78 has sealer protrusions arranged at predetermined positions, and these sealer protrusions and the receiving roller 48. by overlapping part of the joining web W ₃ is sandwiched between the opening edge seal B described above is formed.
Even the opening edge seal device 30 described above, since the front and rear of the winding roller 50 and the merging roller receiving rollers 48 (converging end 18) increases the winding angle of the converging web W ₃ for receiving roller 48, merges the opening edge seal B can be accurately and reliably formed for overlapping portions of the web W _3, it is possible to improve the quality of the double package sheet.

On the other hand, FIG. 10 shows an enlarged view of the periphery of the cutting device 10 and the pasting roller 12 in FIG. 1 described above.
The pair of cutting knives 10b of the cutting device 10 described above is attached to a knife shaft 80, and the knife shaft 80 is rotatably supported by a path frame 84 for the outer web conveyance path 8 via a sleeve 82 and a bearing. Has been. Further, a lever-like rotation operation knob 86 is attached to one end of the knife shaft 80, and the other end protrudes from the path frame 84 as apparent from FIG. A lever 88 is attached to the protruding end of the knife shaft 80, and the tip of the lever 88 and the path frame 84 are connected to each other by a tension coil spring 90.

  As shown in FIG. 10, the tension coil spring 90 includes a dividing position (solid line) where the dividing knife 10b has entered the corresponding circumferential groove of the receiving roller 10a, and the dividing knife 10b on the outer side in the radial direction of the receiving roller 10a. The knife shaft 80 can be rotated and biased via the lever 88 so as to be held at either the retracted retracted position (two-dot chain line). The lever 88 is a stopper at each of the dividing position and the retracted position. (Not shown).

Therefore, by rotating the knife shaft 80 by the rotation operation knob 86, the dividing knife 10b is positioned at either the dividing position or the retracted position. When the cutting knife 10b is in the retracted position, the cutting edge of the cutting knife 10b is covered with the cover 92 as is apparent from FIG.
Furthermore, viewed in the conveying direction of the outer web W _A, the winding roller 94 in the front and rear of the joining roller 12 are arranged, these winding roller 94 receives winding of the outer web W _A for roller 10a and the joining roller 12 Increase each corner.

Therefore, not only performed by the division of the outer web W _A stable according to cutting knife 10b, the outer web W _A after cutting while being supported stably on the joining roller 12 can pass through the joining roller 12 . That is, the three division web portion formed by cutting the outer web W _A without causing positional displacement with respect to the width direction of the outer web W _A, can pass through the joining roller 12, thereby, the outer web W _A The pressure-sensitive adhesive tape T can be accurately and reliably attached to the double packaging sheet, and the quality of the double packaging sheet can be further improved.

The present invention is not limited to the above-described embodiment, and the layout of the outer web transport path 8 and the inner web transport path 16 can be arbitrarily changed. 30 may be arranged downstream of the punching device 34.
Moreover, the packaging machine of this invention is applicable not only to the double packaging sheet for sheet-like laver, but to the packaging of various sheet-like foods.

It is the schematic which showed the packaging machine which forms the double packaging sheet for a handshake. It is the figure which showed the flow of the process of the outer web for forming a double packaging sheet in order of (a)-(c). It is the figure which showed the flow of the process of the inner web for forming a double packaging sheet in order of (a)-(d). FIG. 2 is a view showing a state of an outer web and an inner web at a collecting end in FIG. 1. It is the figure which showed the double packaging sheet. It is the figure which expanded and showed a part of double packaging sheet | seat of FIG. It is the figure which expanded and showed the opening edge sealing device and coupling device which were arrange | positioned in the inner web conveyance path | route in FIG. It is the top view which showed the lower half of the opening edge sealing device and coupling device of FIG. It is the top view which showed the upper half of the opening edge sealing device and coupling device of FIG. It is a figure which expands and shows the periphery of the cutting device arrange | positioned in the outer web conveyance path | route in FIG. It is sectional drawing which showed the cutting device of FIG. 10 in detail.

Explanation of symbols

2 Food transport path 6 Collecting end 8 Outer web transport path 10 Dividing device 12 Pasting roller 14 Break forming device 16 Inner web transport path 18 Junction end (winding roller)
20 First transfer path 22 Second transfer path 24 Third transfer path 30 Opening edge seal device 32 Coupling device 34 Punching device 36 Molding line 40 Lateral seal device (go seal device)
42 Vertical seal device (Go seal device)
46 cutting device 48 receiving rollers 50,94 Vol application rollers 66 heat roller 78 sealer ring _{F 1} unsealing grip portion _G 1, _{G 2} perforations T adhesive tape _{W A} out web _{W B} in the web _{W C} set web _W 1, W ₂ web half W ₃ merged web

Claims (3)

A food conveyance path for intermittently conveying sheet-like food,
The outer end of the food conveyance path is a collection end, an outer web that can be welded toward the collection end is conveyed, and an outer web conveyance path that overlaps the outer web on the surface of the food at the collection end;
An inner web transport path for transporting an inner web that can be welded toward the gathering end, and superimposing the inner web on the back surface of the food at the gathering end, whereby the outer web is routed from the gathering end to the outer web. An inner web transport path in which an aggregate web is formed with the food sandwiched between the inner web and the inner web;
A molding line extending from the collection end and receiving and conveying the collection web;
A surrounding seal device that is provided in the molding line and welds the outer web and the inner web to each other so as to surround individual foods in the course of transporting the collective web;
A cutting device provided in the molding line at a position downstream of the go sealer, cutting the assembly web at predetermined intervals, and forming a double packaging sheet individually enclosing the food,
The inner web conveyance path is:
A first transfer path for conveying one web half forming the inner web;
A second transfer path that transfers the other web half forming the inner web with the end of the first transfer path as a merge end, and one side edges of the two web halves are connected to each other from the merge end; A second transfer path in which a merging web having overlapping portions is formed;
A third transfer path extending from the merging end to the collecting end and transferring the merging web;
The third is provided in the transfer path, the said overlapping portions of the merged web continuously in the transport direction of the merging web and separably welded, seen including a coupling device that forms said inner web,
The double wrapping sheet is used for wrapping a nigiri packaged with nori as the food, and has an unsealing part for unsealing on an outer package made of the outer web,
A pair of parallel lines provided in the outer web conveyance path, which divides the outer web along the conveyance direction and is arranged so as to sandwich the overlapping portion of the merging web from both sides when the collective web is formed. A cutting device for forming a slit;
A sticking roller that is provided in the outer web conveyance path at a position downstream of the dividing device, and guides conveyance of the outer web after the dividing;
Supplying a pair of adhesive tapes toward the sticking roller, an adhesive tape supply device for sticking the adhesive tape so as to cover the slits on the outer web on the sticking roller;
The outer web conveyance path is provided downstream of the affixing roller, and the outer web has a gap that becomes the unsealing part between the pair of adhesive tapes and has a predetermined interval in the conveyance direction of the outer web. An incision forming device to be formed,
A punching device that is provided in the third transfer path and forms punched holes at a predetermined interval in the transfer direction so that the cut of the outer web is positioned in the interior when the collective web is formed; ,
An opening edge seal device which is provided in the third transfer path and forms an opening edge seal so as to be positioned in the vicinity of the opening edge of the punched hole which is removed from the welding with respect to the overlapping portion;
A packaging machine for double packaging sheets , further comprising: The coupling device comprises:
A receiving roller for guiding the transfer of the merging web;
A heat roller that sandwiches the overlapping portion of the merging web with the receiving roller and performs the welding on the overlapping portion;
A winding roller disposed before and after the receiving roller as viewed in the transfer direction of the merged web and for guiding the transfer of the merged web to increase the winding angle of the merged web with respect to the receiving roller. The packaging machine for double packaging sheets according to claim 1. Winding before and after the outer web conveying path is provided in front of and behind the affixing roller as viewed in the conveying direction of the outer web and guides the conveyance of the outer web to increase the wrapping angle of the outer web with respect to the affixing roller. The packaging machine for double packaging sheets according to claim 1 or 2 , further comprising an attaching roller.

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