JP4909504B2 - Folding method and apparatus in square bottom bag molding - Google Patents

Description

The present invention, for example to obtain a self-supporting of some angular bottom packaging bag or a bag package using the same, about the shaping method and equipment folding definitive the corner bottom FukuroNaru shaped attaching a habit folding the packaging material.

  Conventionally, a square bottom bag or a square bottom bag package in which a gusset is formed on a square bottom portion is employed as one form of a bag or a bag package in which a product is packaged inside a bag. Since the bottom portion of the square-bottom bag package is configured to be relatively flat, it can be efficiently packed in a box to improve the degree of integration in the distribution stage. In addition, the square-bottom bag package is easy to manage products from the manager side because it sits on the shelves and can be lined up even when displayed on store shelves. At the same time, it leads to an improvement in the image of the orderliness and cleanliness of the store for consumers.

  Folding claws are attached to the end sealers that are installed in an automatic packaging machine that manufactures self-supporting packaging, and sandwiches and seals the tubular packaging material, and when the end sealer sandwiches the tubular packaging material, It has been proposed that the claws sandwich the position along the end-sealed portion of the cylindrical packaging material and put a crease. The package body is made independent by making the bottom surface of the package body substantially flat by bending the ear part side where the crease is attached (Patent Document 1).

In the automatic packaging machine, on the upstream side of the means for forming the cylindrical packaging material, a first film folding device for folding a predetermined position along the traveling direction of the strip film, and a direction orthogonal to the traveling direction of the strip film And a second film folding device for crease. The first film folding device is used to fold the packaging body at four corners so that the outer shape of the packaging body can be easily formed into a substantially rectangular shape. Furthermore, when forming a gusset, by attaching a habit folding position will be folded the gusset, forms a clean Gazette, and easily bend the ears. Further, by providing the second film folding device, a crease is attached to the predetermined position of the film on the ear portion side where the crease is attached by the folding claw provided in the end seal device. The film is folded neatly to make the bottom of the package almost flat. The second film folding apparatus includes first and second folding rollers that have a cylindrical rotating body that is opposed to the upper and lower sides of the belt-like film and that is longer than the width of the belt-like film and that rotates synchronously. ing. The first crease roller has a first crease portion having a convex portion for pushing the belt-like film projectingly disposed on the outer peripheral surface of the rotating body, and the second crease roller is disposed to project on the outer peripheral surface of the rotator. It has the 2nd crease part which has a recessed part which corresponds to a convex part.

A predetermined film portion of the belt-like film that is being pulled out from the raw fabric roll passes through the second film folding device, so that the first and second folding parts hit each other in time, and the belt-like film 11 is placed from above and below. A crease is attached so that it may be sandwiched by pressure and cross in the lateral direction of the strip film. Specifically, the position where the lateral signature is applied is the side that comes to the lower side (bottom) in the final package. Then, a total of six folds (mountain fold folds, valley fold folds) are attached to predetermined positions along the film traveling direction by passing through the first film folding apparatus. A belt-like film with creases attached at a predetermined position is guided to a bag making machine, and passes through the bag-like film to form a bag into a cylindrical film. At this time, four fold folding folds are led to the four corners of the bag making machine to form a square cylinder. The cylindrical film is sealed in the lateral direction by the end seal device, and cut to form a package as described later (see FIG. 6). And a gusset is formed by pushing the part of the folding fold for valley folding into the center of a square cylinder with the gusset nail | claw of a gusset formation apparatus. Moreover, a crease is attached along one ear | edge part of a package by a crease claw. Of the ears formed by being end-sealed, a crease formed by the second film folding device is formed on one ear side. The folds are folded at the crease and the crease, and the ear portion side is folded to form a self-supporting package having a flat bottom surface.

  As another known example, a stamper having vertical and horizontal ruled lines forming a vertical and horizontal valley fold line and a mountain fold line is arranged on a film sheet (web) continuously supplied in the order of the sheet feeding direction. The manufacturing method and apparatus of the provided square tube packaging bag are proposed (patent document 2). However, the detailed structure of this stamper is not shown, and it is considered that the stamper is merely a ruled line.

  However, most of the self-supporting bags that have been proposed so far are manufactured by applying a gusset on the bottom side and end sealing. Even if it is formed by attaching a round crease on the bottom side of the bag or further folding the end seal part on the bottom surface of the bag, as shown in FIG. Although the streak 96 by the crease may be attached to the boundary portion between the side surface portions 93 and 94 of the rectangular tube barrel portion 91 and the corner bottom portion 92, the round portion 95 is formed as a whole, and a clear crease is formed. Is not attached. When the ratio of the length of the short side 98 to the length of the long side 97 of the corner bottom 92 is about 0.5 or less, when the product to be packaged is a weighing product such as a snack confectionery, Independence is low and falls almost naturally or with a slight force.

To make a clear crease at the boundary between the side surface and the bottom surface, the bag packaging is formed by a post-molding device separate from the automatic packaging machine, such as forming hem seals at the four corners, etc. The body had to be reshaped. Such another post-molding device generally causes the total cost of the packaging machine to be reduced, leading to a decrease in the production capacity of the bag packaging body, and thus an increase in the manufacturing cost of the individual bag packaging body. Is also connected.
JP 2001-354212 A (paragraphs [0009] to [0010], [0040] to [0043]; FIGS. 7, 10, and 11) Japanese Patent No. 2937012 (paragraphs [0027] and [0058]; FIG. 1)

  Therefore, for example, a flat packaging material such as a web-shaped packaging material fed out from a raw fabric roll, in order to give a clear crease without forming after the cylindrical packaging material or the bag packaging body is manufactured. There is a problem to be solved in that the crease to be attached to can be maintained in a state in which it is bent at both sides of the crease formed at the boundary between the rectangular tube body and the bottom.

An object of the present invention is to form such a packaging material by attaching a crease capable of maintaining a folded state on both sides of the crease formed at the boundary between the rectangular tube barrel portion and the corner bottom portion to form the packaging material. When it is used as a packaging bag or a bag package using the same, it has a shape retention and display state in which a clear crease is attached to the boundary between the square tube barrel and the bottom and the folded state is maintained on both sides. It allows the autonomy to obtain a very high angular bottom packaging bag or a bag package, is to provide a shaping method and apparatus the folding definitive the corner bottom FukuroNaru form.

To solve the above problems, shaping folding method at the corner bottom bag molding according to the invention, in the molding of the corner bottom bag having a Tairajo packaging material or et angle bottom and rectangular tube body portion, the flat-shaped packaging material traveling extend longitudinally along the direction with the first creases linear in a position bent portion of the corner portion between the side portions that fit Ri next to the rectangular tube body portion is scheduled, then the borderline between the front Symbol angle the bottom of the corner bottom bag extend laterally and said rectangular tube body portion is scheduled in the running direction downstream of Tairajo packaging perpendicular to the running direction of the flat-shaped packaging material The belt-shaped region of the flat packaging material including the linear portion of the flat packaging material extending on both sides of the flat packaging material is heated and pressurized to thermally transform and attach second creases.

According to shaping folding method in this corner bottom bag forming, when forming the corner bottom bag having a Tairajo packaging material or et angle bottom and rectangular tube body portion, the corner bottom corner bottom bag and the rectangular tube body portion A portion of the flat packaging material where the boundary line between the two is expected to be folded, but at this time, the belt-like region of the flat packaging material including the linear portion and extending on both sides thereof is heated and thermally transformed. The second crease is attached. Since the second crease is a transformation in the belt-like region, the crease does not return after being formed, and a crease having a clear angle is formed by the crease when it is formed into a square bottom bag. A sharp corner is formed and maintained between the base and the bottom.

In the folding method for forming a square bottom bag, the first folding bar is formed by being sandwiched between a convex folding bar forming blade and a corresponding concave folding bar forming blade and pressed linearly. The tip angle of the convex crease forming blade is smaller than the bottom opening angle of the concave crease forming blade, and the second crease has a V-shaped forming convex shape and a corresponding one. The belt-shaped region of the flat packaging material is formed with the V-shaped molding convexity by being sandwiched by a molding die composed of a V-shaped molding concave die, with the linear portion positioned at the V-shaped apex. It is attached by heating in a pressurized state between substantially parallel inclined surfaces of the mold and the V-shaped molding concave mold. By incorporating a heat source in the mold, the belt-like region of the flat packaging material including the linear portion and extending on both sides thereof is heated and thermally transformed.

In the folding method for forming a square bottom bag, the flat packaging material is a web-shaped packaging material capable of continuously forming the square bottom bag, and the first folding bag is formed when the square bottom bag is molded. and two mountain fold shape creases two sets of which will extend in the longitudinal direction at the position where the bent portion of the angle portion between the side portions adjacent of the rectangular tube body portion is expected, the in each set A valley fold fold extending in the longitudinal direction corresponding to a position where a middle gusset fold between the two mountain fold folds is planned, and the second fold is the corner of the square bottom bag. The web-shaped packaging material travels at a pitch in units of the square bottom bag between the bottom and the square cylinder body or between the square bottom and the square head of the square bag and the square cylinder body. It can be a mountain fold crease formed repeatedly in the direction. That is, by repeatedly setting the belt-like region on the web-like packaging material as described above, the traveling web-like packaging material has a corner bottom portion and a bag top portion in the running direction in the same manner as in normal bag-filling packaging. Square bottom bags lined up in order can be continuously formed.

Moreover, shaping device folding in the corner bottom bag molding according to the invention, in the molding of the corner bottom bag having a Tairajo packaging material or et angle bottom and rectangular tube body portion, along the running direction of the flat-shaped packaging material a shaping device folding a first attaching a first creases linear in a position bent portion of the corner portion between the side portions that fit Ri next to the rectangular tube body portion extending in the longitudinal direction are expected, the first the rectangular tube body and previous SL angle the bottom of the corner bottom bag extend in a lateral direction perpendicular from the shaping device in the running direction of the flat-shaped packaging material wherein the flat-shaped packaging material is arranged in the running direction downstream of the folding A second crease formed by heating and pressurizing a belt-like region of the flat packaging material including a linear portion of the flat packaging material, which is expected to have a boundary line with a portion, and extending on both sides thereof; And a two-fold brazing device.

According to definitive folding shaping apparatus to the corner bottom FukuroNaru shape, the second folding shaping device, the boundary line between the corner bottom and rectangular tube body portion as a future angle bottom bags from Tairajo packaging since forming the band-like region of the flat-shaped packaging material extending on both sides includes a linear portion content flat-shaped packaging material which is expected to pressure and heat, the band-like region with the second crease is thermally denatured is Ru. Because it is not a linear transformation of the crease but a transformation in a belt-like region straddling the crease, there is no return of the crease after forming the square bottom bag from the flat packaging material, and the crease has a clear angle. A square bottom bag is formed in which a folded fold is formed and a sharp corner is formed and maintained between the square barrel body and the corner bottom.

In the folding apparatus for forming a square bottom bag, the first folding apparatus includes a convex crease forming blade and a concave crease forming blade corresponding to the convex crease forming blade, The first crease is formed by pressing it linearly across the flat packaging material, and the tip angle of the convex crease forming blade is smaller than the bottom opening angle of the concave crease forming blade. The second folding and brazing device is formed into a molding die set including a V-shaped molding convex mold and a corresponding V-shaped molding concave mold, and the linear portion is formed as the V-shaped apex. The belt-shaped region of the flat packaging material is heated in a pressurized state between substantially parallel inclined surfaces of the V-shaped molding convex mold and the V-shaped molding concave mold. second folding habit is attached. A crease is attached to the linear portion located at the apex of the V shape by pressing the flat packaging material with a forming die set of a V-shaped forming convex shape and a forming concave shape. At the same time, the belt-like regions of the flat packaging material extending on both sides of the linear portion are sandwiched and pressed by the slope regions located on both sides of the apex of the V-shaped mold. By incorporating a heat source in the mold, the belt-like region of the flat packaging material including the linear portion and extending on both sides thereof is heated and thermally transformed.

In definitive folding shaping apparatus to the corner bottom FukuroNaru type, said flat-shaped packaging material is continuously formable web-like packaging material the angle bottom bags, the first folding shaping device, folding of the convex A roller having a ridge forming blade and the concave crease forming blade on a peripheral surface, and the corner portion between the adjacent side surface portions of the rectangular tube body portion when the square bottom bag is formed; Two sets of two mountain fold folds that will extend in the vertical direction at the planned position, and a vertical position corresponding to the position where the middle gusset fold between the two fold folded folds in each set is planned. A rotary folding device for forming a valley fold crease extending in a direction, wherein the second folding device is configured such that the square bottom portion of the square bottom bag and the square tube barrel portion Or between the square bottom and square head of the square bottom bag and the square cylinder body It may be a belt-like heating mold the reciprocating to repeatedly in the running direction of the web-like packaging material put mountain fold shape creases as the second crease in pitch by the angle bottom bag units. That is, by repeatedly setting the belt-like region in the running direction of the web-like packaging material as described above , the folding device can be applied to the vertical bag making machine or the vertical bag making filling and packaging machine. From the web-like wrapping material, a square bottom bag in which a square bottom portion and a bag top portion are arranged in that order in the running direction can be continuously formed.

Shaping folding method at the corner bottom bag molding according to the present invention, and shaping equipment folding in the corner bottom bag molding, which is configured as described above, after the first crease formed first, the rectangular tube body to heating on both sides of the fold line formed at the boundary between the parts and the corner bottom-pressurized form a second crease attached to zone area Accordingly, there is no return of creases after molding, bent As a result, when the packaging material is formed into a square bag or a bag package using the same, the square bag or bag package is square. A clear crease is attached to the boundary between the cylindrical body portion and the corner bottom portion, and the shape retention property that maintains the folded state on both sides thereof and the self-supporting property in the display state can be made extremely high.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of folding and folding in forming a square bottom bag according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view of a vertical bag making filling and packaging device as a square bottom bag forming device to which a folding device according to the present invention is applied, and FIG. 2 is a modification of the vertical bag making filling and packaging device shown in FIG. It is the schematic which shows the principal part.

  According to the vertical bag making filling and packaging apparatus shown in FIG. 1, the web-like packaging material (flat packaging material) 62 wound up as a film-like packaging material roll (raw fabric roll) 63 is composed of a plurality of guide rollers. After being guided by 65, it is fed out while being sandwiched between a feed roller 64 comprising a pinch roller and a guide roller 65. The web-shaped packaging material 62 that has been fed is loosened by the weight of the weight roller 67 whose both end support shafts are vertically guided in the vertical grooves 66 formed in the frames on both sides, and has an appropriate tension. Given. The web-shaped packaging material 62 passes through an adjustment roller 68 and a final guide roller 69, reaches the main body of the vertical bag making and packaging device 60, and is molded into a cylindrical packaging material 71, and then a product A such as a light snack confectionery, for example. Is put into the cylindrical packaging material 71 and finally formed into a bag package P.

The vertical bag making filling and packaging device 60 is located inside the cylindrically formed packaging material, and forms the web-shaped packaging material 62 into a cylindrical shape, and guides the travel of the packaging material from above. A filling cylinder 72 into which a product to be packaged is charged, a vertical sealing means 73 for forming a cylindrical packaging material 71 by performing vertical sealing (center sealing) on the cylindrically bent packaging material, and the cylindrical packaging material 71 and a transverse sealing means 74 that form a bag 75 performs transverse seal (end seal) to. By completing the process until the horizontal seal is formed, the bag package P is manufactured. The packaging date and time is printed on the web-shaped packaging material 62 by the date device 77. The sensor 76 detects the registration mark M on the web-shaped packaging material 62, the rotary encoder (not shown) measures the feed length of the web-shaped packaging material 62, and a control device (not shown) in which such information is input. Z) controls the brake / clutch provided on the output shaft of the motor, which is the drive source of the packaging material feed mechanism 78 (only one shown) provided on the left and right sides of the filling cylinder 72 respectively. The packaging material feed mechanism 78 includes a feed belt 79 that feeds the cylindrical packaging material 71 having a rectangular tube shape on the outer periphery of the filling cylinder 72. Since the lateral seal means 74 described later is a reciprocating means, the packaging material is intermittently fed throughout the apparatus 60 after the weight roller 67.

  The upper part of the filling cylinder 72 is a cylindrical cylinder part 72a, but changes to a lower rectangular cylinder cylinder part 72c via a continuous cross-sectional shape transition part 72b on the way. The web-shaped packaging material 62 is bent in a cylindrical shape with a circular cross section at the cylindrical cylindrical portion 72a, but continuously changes to a rectangular cross section as it passes through the cross-sectional shape transition portion 72b, and a cross-section at the rectangular cylindrical cylindrical portion 72c. It is formed into a rectangular tubular packaging material 71 and travels. The lateral seal means 74 is sandwiched from both sides facing the cylindrical packaging material 71 (square cylinder body) below the lower end of the filling cylinder 72, and the bag head of the bag package P manufactured in advance. A lateral seal is formed on the square bottom of the bag 75 manufactured subsequently. A cutter is incorporated in the lateral seal means 74, and the cutter cuts the cylindrical packaging material 71 between the lateral seal portion at the bag head and the lateral seal portion at the corner bottom.

  In relation to the lateral sealing means 74, a gusset folding means 80 is provided. In this example, the gusset folding means 80 is composed of a pair of horizontal triangular plates that fold the gusset against the corner bottom of the subsequent bag above the lateral sealing means 74. The cylindrical packaging material 71 is a rectangle whose cross section is composed of a pair of long sides and a pair of short sides, but the gusset folding means 80 is from the short side, that is, a direction orthogonal to the operating direction of the lateral seal means 74. It is arranged to act by pushing it in from. The gusset folding means 80 is operated at a timing preceding the operation of the lateral sealing means 74, and the lateral sealing means 74 is activated immediately after the gusset folding is completed. 71 is cut. In order to bend the transverse seal part after cutting into the square bottom part, it is possible to arrange a transverse seal part bending means made of a plate material that goes in and out from the side at the square bottom part, but this means is well known. Details are omitted.

  In the modification of the vertical bag making filling and packaging apparatus shown in FIG. 2, a gusset folding means 81 for the bag head is additionally provided. The gusset folding means 81 is composed of a pair of horizontal triangular plates, like the gusset folding means 80. The gusset folding means 81 is composed of a pair of vertical triangular plates that are formed in advance under the lateral seal means 74 and fold the gusset against the bag head of the bag P1 filled with the product A. According to this configuration, when the lateral seal is formed on the head of the product-filled bag manufactured in advance, the bag head can also fold the gusset. At this time, if an internal pressure is further applied to the bag P1, the gusset can be folded and formed into a square head like the square bottom.

  As shown in FIG. 1, the folding device 10 is arranged on a travel path where the web-shaped packaging material 62 fed out from the packaging material roll 63 reaches the vertical bag making filling packaging device 60. Specifically, after the web-shaped packaging material 62 passes from the packaging material roll 63 through the weight roller 67 and is guided by the adjusting roller 68 to extend horizontally, the web-shaped packaging material 62 is bent into the cylindrical packaging material 71. On the way to the former 70 provided in the vertical bag making filling and packaging device 60, the folding / fitting device 10 is provided. A date printing device 77 is provided on the upstream side of the folding device 10, and a registration mark M detection sensor 76 is provided on the downstream side.

The folding device 10 includes a first folding device 11 for attaching a first folding device 21 extending in the longitudinal direction, that is, the longitudinal direction along the traveling direction of the web-shaped packaging material 62, and immediately after the downstream side in the traveling direction. And a second folding device 12 for attaching a second folding device 22 extending in the transverse direction perpendicular to the traveling direction of the web-shaped packaging material 62. The first fold 21 is composed of a mountain fold fold 21a and a valley fold fold 21b.

  FIG. 3 is a diagram showing a first folding device among the folding devices shown in FIG. 1, and FIG. 4 is a diagram showing a second folding device among the folding devices shown in FIG.

Although the 1st folding apparatus 11 is shown as a reciprocating type folding apparatus in FIG. 1, as shown to Fig.3 (a), the 1st folding apparatus 11 is a web-shaped packaging material. 62 Ru can be a rotary folding shaping apparatus provided with a roller having an axis of rotation in a direction parallel to the transverse direction of. The first creasing device 11 includes an upper roller 23 on which convex crease forming blades 25 and concave crease forming blades 26 are formed, and peripheral surfaces corresponding to the crease forming blades 25 and 26, respectively. And a lower roller 24 on which a concave crease forming blade 27 and a convex crease forming blade 28 are formed. The upper roller 23 and the lower roller 24 are respectively provided above and below the web-shaped packaging material 62 so as to correspond to each other at predetermined positions. Four sets of convex crease forming blades 25 and concave crease forming blades 27 are arranged, and when a bag is formed, first folds 21a in a mountain fold shape extending in the vertical direction at the four corners ( 1 and 2). A concave crease forming blade 26 and a convex crease forming blade 28 are arranged between the convex crease forming blades 25, 25 and the concave crease forming blades 27, 27, and formation thereof. By the blades 26 and 28, a valley fold fold 21b (see FIGS. 1 and 2) is formed at an intermediate position between the mountain fold folds 21a and 21a.

  By means of the first folding device 11, two sets of two mountain fold folds 21a along the running direction of the web-shaped packaging material 62 and valley folds at positions between the two mountain fold folds 21a in each set. Conveniently six vertical folding folds 21 consisting of the shape folding folds 21b are continuously attached. The mountain fold folds 21a are folds extending in the vertical direction at the four corners of the body of the bag wrapping body to be finally produced, and the valley fold folds 21b are short sides of the body of the bag wrapping body. At the center position on the side, a fold-shaped crease according to the gusset fold is formed.

  As shown in FIG. 3B, the tip angle of the convex crease forming blades 25, 28 is smaller than the bottom opening angle of the concave crease forming blades 26, 27. The web-shaped packaging material 62 includes the narrowest portions of the crease forming blades 25, 28, that is, the tip portion 29 of the convex crease forming blades 25, 28 and the bottom 30 of the concave crease forming blades 26, 27. The creases 21a and 21b are formed by being pushed linearly at the portion sandwiched between the two. Since the upper and lower rollers 23 and 24 for attaching the folding folds 21a and 21b incorporate heating means (not shown), they are molded while heating the packaging material. The slopes 31 and 31 on both sides of the tip 29 of the convex ridge forming blades 25 and 28 and the slopes 32 and 32 on both sides of the bottom 30 of the concave fold forming blades 26 and 27 are gradually from the tip 29 (bottom 30). Since it spreads, the web-shaped packaging material 62 is hardly pressed / heated except for the linear portion of the crease 21.

  As shown in FIG. 4 (a), the second folding device 12 for attaching the second folding bag 22 extending in the lateral direction is a web-like packaging at two predetermined positions for each packaging bag unit length. These are two sets of reciprocating folding devices equipped with molding tools 40 and 41 that extend in the lateral direction perpendicular to the traveling direction of the material 62 and sandwich the web-shaped packaging material from above and below. Each set of forming tools 40 and 41 is provided corresponding to predetermined positions of the corner head and the corner bottom of the bag in the vertical direction. The molding tools 40 and 41 have a length exceeding the width of the web-shaped packaging material 62, and operate to sandwich and separate the web-shaped packaging material 62 at the same time by an appropriate drive mechanism. The drive mechanism may be a mechanical drive mechanism that converts the rotation into reciprocating motions in opposite phases, and may be operated in opposite directions by an air cylinder.

In this example, the forming tool 40, 41 of each set is attached between the corner bottom 2 and the corner head 9 of the square bottom bag (see P in FIG. 5) and the square tube barrel 1 in this example. a band-like region 52 of the web-like packaging material 62 extending on both sides includes a linear portion content of the web-like packaging material 62 which border is scheduled (see a hatched region in Figure 4 (b)). Each of the molding tools 40 and 41 has a stamp bar-type belt-shaped thermoforming mold that heats and pressurizes the belt-shaped region 52 to form. The belt-shaped thermoforming die comprises a forming convex die 42 having a V-shaped crease forming blade 44 on the lower surface and a forming concave die 43 having a corresponding V-shaped crease forming groove 45 on the upper surface. It is configured in a mold set. Heating means 46 such as a heater is built in the molds 42 and 44, and the belt-shaped region 52 is heated at the same time as it is pressurized.

As shown in FIG. 4B, the slopes 50 on both sides of the apex 48 of the V-shaped crease forming blade 44 in the molding convex mold 42 and the bottom 49 of the V-shaped crease forming groove 45 in the molding concave mold 43. The slopes 51 on both sides are substantially parallel. By driving the molding dies 42 and 43 in a state where the linear portion of the web-shaped packaging material 62 is aligned with the apex 48 of the crease forming blade 44, the belt-shaped region 52 of the web-shaped packaging material 62 is formed into a V-shape of the molding die. would be heated under pressure between the inclined surfaces 50 and 51 of the habit-forming groove 45 and folding Jo of creases forming blades 44, located at the bottom 49 and its corresponding apex 48 of the V-shaped linear portions A second crease 22 is attached to. At the same time, the belt-shaped region 52 of the flat packaging material extending on both sides of the linear portion is sandwiched and pressurized by the regions of the inclined surfaces 50 and 51, and is thermally transformed.

  Each set of forming tools 40 and 41 is disposed at a position corresponding to a position where a square gusset is folded into the bag in the packaging material for one bag indicated by pitch p in FIG. Therefore, the upper and lower molds 42 and 43 allow the packaging material for one bag to be folded into the gusset folding position of the packaging bag so that the second folding rods 22 and 22 having a mountain fold shape that circulates in the circumferential direction of the rectangular tube body portion (see FIG. 1, see FIG. 2).

  By repeatedly setting the belt-like region 52 in the direction crossing the web-shaped packaging material 62 at a pitch p in units of square bottom bags, the square bottom bag packaging body P can finally be continuously formed. That is, by repeatedly setting the belt-like region 52 on the web-shaped packaging material 62 as described above, the corner bottom portion and the bag in the traveling direction are moved from the traveling web-shaped packaging material 62 in the same manner as in normal bag making and packaging. The square bottom bag packaging body P in which the top part is arranged in order can be continuously formed.

  FIG. 5 shows an example of a bag package in which lightweight confectionery such as snack confectionery is packaged as a product in a packaging bag. The bag packaging body P is a gusset packaging body in which a gusset fold is applied to the square bottom portion 2 to form a gusset square bottom portion. 5 (a) is a perspective view showing an example of a bag package P in which the bag head 9 is not gusset folded, but FIG. 5 (b) is a bag package in which the bag head 9 is gusset folded. It is a perspective view which shows an example of body P '. The gusset folding at least on the bottom side is performed by the gusset folding means 80 on the basis of the second folding bar 22 that is a mountain fold. The corner bottom portion 27 is a rectangular gusset corner bottom portion surrounded by the long side 7 and the short side 8.

  Since the molding dies 42 and 43 are provided with heating means 46 therein, they operate when the web-like packaging material 62 is intermittently stopped, and heat is applied when strongly sandwiched to transform the packaging material. The conditions (temperature / time) for applying creases vary depending on the type and thickness of the material and (multilayer / metal film layer). Since the belt-like region 52 including the second crease 22 of the packaging material is transformed by heat, the crease 5 formed from the crease 22 is not returned after the manufacture of the bag wrapping P, and the square bottom bag wrapping is performed. When formed into a body P, a crease 5 having a clear angle is formed at least around the corner bottom 2, and a sharp right angle is formed between the square barrel body 1 and the corner bottom 2 and around the corner bottom 2. Parts are formed and maintained. Therefore, the shape retention of the bag package P is enhanced, and even when a lightweight product is packaged, the independence is ensured, and with a little force, the shape does not collapse or fall down. It is possible to manufacture a bag or a bag package having excellent display properties.

It is the schematic of the vertical type bag making filling packaging apparatus as a square bottom bag shaping | molding apparatus with which the folding / fitting apparatus was applied. It is the schematic which shows the principal part of the modification of the vertical type bag making filling packaging apparatus shown in FIG. It is a figure which shows the 1st folding apparatus among the folding apparatuses shown in FIG. It is a figure which shows the 2nd folding apparatus among the folding apparatuses shown in FIG. It is a figure which shows an example of the bag packaging body which packaged lightweight confectionery like a snack confectionery in a packaging bag as a product. It is a perspective view which shows an example of the package body of the conventional square bottom bag.

DESCRIPTION OF SYMBOLS 1 Square cylinder trunk | drum 2 Square bottom part 9 Square head 10 Folding apparatus 11 1st folding apparatus 12 2nd folding apparatus 21 1st folding apparatus 21a Mountain folded folding machine 21b Valley folding machine 22 2 folds
23 Upper roller 24 Lower roller 25, 28 Folding edge forming blade (convex) 26, 27 Folding edge forming blade (concave)
DESCRIPTION OF SYMBOLS 29 Tip part 30 Bottom part 31, 32 Slope 40, 41 Molding tool 42 Molding convex mold 43 Molding concave mold 44 Folding crease formation blade 45 Folding crease formation groove 46 Heating means 48 Vertex 49 Bottom part 50 Slope 51, 52 Belt-shaped area 60 Filling and packaging device 62 Web-like packaging material 63 Packaging material roll 64 Feed roller 65 Guide roller 66 Groove 67 Weight roller 68 Adjusting roller 69 Final guide roller 70 Former 71 Cylindrical packaging material 72 Filling cylinder 72a Cylindrical cylinder part 72b Cross-sectional shape transition part 72c Square cylinder 73 Vertical seal means 74 Horizontal seal means 75 Bag 76 Sensor 77 Date device 78 Packaging material feed mechanism 79 Feed belt 80, 81 Gusset folding means A Product P, P1 Bag package M Registration mark

Claims (4)

In the molding of the corner bottom bag having a Tairajo packaging material or et angle bottom and rectangular tube body portion,
The first creases linear in a position bent portion of the corner portion between the adjacent Ri meet side portion of the rectangular tube body portion extend longitudinally along the running direction of the flat-shaped packaging material is expected With
Then, the boundary line between the rectangular tube body portion and the front Symbol angle the bottom of the corner bottom bag extend laterally perpendicular to the running direction of the flat-shaped packaging material in the running direction downstream of the flat-shaped packaging material The belt-shaped region of the flat packaging material that includes the linear portion of the flat packaging material that is scheduled to be heated and pressurized and thermally transformed to attach a second crease ,
The first crease is formed by being sandwiched between a convex crease forming blade and a corresponding concave crease forming blade and pressed linearly, and a tip of the convex crease forming blade The angle is made smaller than the bottom opening angle of the concave crease forming blade,
The second crease is formed by being sandwiched by a mold composed of a V-shaped molding convex mold and a corresponding V-shaped molding concave mold, and the linear portion is positioned at the vertex of the V-shaped. Then, the belt-like region of the flat packaging material is attached by heating in a pressurized state between substantially parallel inclined surfaces of the V-shaped molding convex mold and the V-shaped molding concave mold. A method of folding in square bottom bag molding. The flat packaging material is a web-shaped packaging material capable of continuously forming the square bottom bag,
The first crease extends in the vertical direction at a position where the bent portion of the corner portion between the side surface portions adjacent to each other of the square tube body portion is planned when the square bottom bag is formed. A pair of mountain fold folds, and a valley fold fold that will extend in the longitudinal direction corresponding to the position where the middle gusset folds between the two mountain fold folds are scheduled in each set. Yes,
The second crease is between the square bottom portion of the square bottom bag and the square tube barrel portion, or between the square bottom portion and square head portion of the square bottom bag and the square tube barrel portion, The folding method for forming a square bottom bag according to claim 1 , further comprising a mountain fold crease formed repeatedly in the running direction of the web-shaped packaging material at a pitch of the square bottom bag unit. In the molding of the corner bottom bag having a Tairajo packaging material or et angle bottom and rectangular tube body portion,
Attaching a first creases linear in a position bent portion of the corner portion between the adjacent Ri meet side portion of the rectangular tube body portion extending longitudinally along the running direction of the flat-shaped packaging material is expected A first folding apparatus;
Wherein the front Symbol angle the bottom of the corner bottom bag extend laterally perpendicular from said first folding shaping device in the running direction of the flat-shaped packaging material wherein the flat-shaped packaging material is arranged in the running direction downstream of the A second crease formed by heating and pressurizing a belt-like region of the flat packaging material that includes a linear portion of the flat packaging material that is expected to have a boundary line with the rectangular cylinder body, and extends on both sides thereof the includes a second folding shaping device to give,
The first folding device includes a convex crease forming blade and a corresponding concave crease forming blade, and the linear wrapping material is sandwiched between the both crease forming blades and pushed linearly. The first crease is formed, and the tip angle of the convex crease forming blade is smaller than the bottom opening angle of the concave crease forming blade,
The second folding apparatus is configured as a molding die set including a V-shaped molding convex mold and a corresponding V-shaped molding concave mold, and the linear portion is at the V-shaped apex. By positioning and heating the belt-like region of the flat packaging material in a pressurized state between substantially parallel inclined surfaces of the V-shaped molding convex mold and the V-shaped molding concave mold, the second A folding device for forming a square-bottom bag consisting of folding. The flat packaging material is a web-shaped packaging material capable of continuously forming the square bottom bag,
The first folding device has a roller having a circumferential surface with the convex crease forming blade and the concave crease forming blade, and the square tube is formed when the square bag is formed. Two sets of two mountain fold folds that extend in the vertical direction at the position where the corner between the side portions adjacent to each other of the trunk portion is planned, and the two mountain fold folds in each set It is a rotary folding device that forms a valley fold crease that will extend in the longitudinal direction corresponding to the position where the intermediate gusset fold is planned,
The second folding brazing device is provided between the square bottom portion of the square bottom bag and the square tube trunk portion, or between the square bottom portion and the square head portion of the square bottom bag and the square tube barrel portion. , to claim 3 consisting in pitch by the angle bottom bag units is a band-shaped heating mold reciprocating the running direction repeatedly put mountain fold shape creases as said second creases of the web-like packaging material The crease knitting apparatus in square bottom bag shaping | molding of description.

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