JP2005119185A - Bag making apparatus having streak forming mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag making apparatus having a streak forming mechanism which forms a streak without hurting a film. <P>SOLUTION: The film is passed through an angular bag making tube 2 into an angular tube. A projection 13 for forming the streak in the angular part of the bag making tube is formed. An emphatic projection 20 projecting further from the projection 13 is formed to form the sharp streak in the film. A press guide 15 is formed on the short side 2b of the bag making tube 2 having the emphatic projection 20 to press the film. Back plates are arranged on the long side 2a with the emphatic projection held between them to press the film. An L-shaped (in plane view) corner heater 23 is set non-contactwise at a position opposite the emphatic projection 20. By irradiating the film streak on the emphatic projection 20 with the radiation heat of the corner heater 23. The streak is plastic-deformed to be fixed. Since both sides of the streak of the film are covered with the press guide 15 and the back plate, the film is protected from the radiation heat. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bag making apparatus provided with a scoring mechanism that forms a film to form various bags such as a gusset bag, and forms a streak at a corner of the bag in a bag making process.

In general, a gusset bag refers to a bag formed into a substantially rectangular tube shape or a substantially box shape by filling a bag with contents. Some of these gusset bags have streaks and are formed into clean and clear-looking bags.
As a gusset bag making and filling device provided with this type of basis weight mechanism, for example, there are devices described in the following Patent Documents 1, 2, 3, and 4.
For example, the scoring device of the vertical bag making filling and packaging machine described in Patent Documents 1, 2, and 3 forms a streak by passing a packaging film between the convex part and the concave part while pressing it from both sides. It is. In addition, a heater is built in at least one of the convex portion and the concave portion, and, for example, the heated convex portion and the concave portion are pressed and sandwiched between the films, thereby fixing the lines on the film.
Although patent document 4 is not a technique regarding a scoring device, it relates to a heat seal of a tubular film, and discloses a technique in which a part of the film is brought into contact with the heating surface and a non-contact part is heated and sealed by radiant heat. .
Japanese Utility Model Publication No. 3-56492 Japanese Utility Model Publication No.7-111509 JP-A-9-95319 JP 2002-193215 A

However, the scoring devices described in Patent Documents 1, 2, and 3 have a problem in that even if streaks are formed on the film due to pinching and contact heating between the convex portions and the concave portions, the film is damaged. Patent Document 4 only discloses a heating means for performing a palm seal of the film, and this heating means includes a portion where the film is in contact with the heating surface and a non-contact portion for performing the palm seal. It's just technology. Patent Document 4 is not an invention for streaking a film.
In view of such a situation, an object of the present invention is to provide a bag making apparatus provided with a scoring mechanism that forms a streak without damaging the film.

A bag making apparatus having a line weighting mechanism according to the present invention is a bag making apparatus in which a film is wound around a bag making tube to form a cylindrical film, and a line is formed on a side surface of the cylindrical film. A projection formed at the corner of the side surface of the bag tube and forming a line at the corner of the passing tubular film, and the projection is opposed to the projection through the tubular film and is disposed in a non-contact manner. And a heater, and the streaks of the tubular film are fixed by the radiant heat of the heater.
A tubular film such as a rectangular tube is formed and conveyed along the bag-making tube, and the film is passed along the protrusion by passing the tubular film while contacting the protrusion provided on the side corner of the bag-making tube. Streaks can be formed on the projections, and the streaks of the film on the projections can be fixed by deforming the streaks in a plastic manner by irradiating the heating with radiant heat while facing the heater in a non-contact manner. At that time, the projections forming the lines on the tubular film press the film from one side and irradiate non-contact radiant heat so that the film is not damaged.

Further, it is preferable to form an emphasis protrusion that protrudes further than the protrusion in a region of the protrusion facing the heater.
When passing through the emphasizing protrusion, the tubular film protruded by the protrusion is further pulled outward, so that slight looseness is eliminated and a streak is formed more strongly, so that a sharper streak can be formed.
Moreover, it is preferable that the heater has an L-shaped heating surface in cross section facing the protrusion and can be adjusted in the diagonal direction of the bag-making tube.
Even when the size of the bag-making tube or bag is different, it is possible to cope with bags of different sizes by adjusting the movement of the heater in the diagonal direction, and it can be easily held in a non-contact proximity position, and radiant heating of the film can be performed reliably.
In addition, a pressing guide that sandwiches the tubular film is disposed on one side surface that forms a corner portion having a projection of the bag-making tube, and a guide member is disposed on the other side surface with the tubular film sandwiched therebetween, It is preferable that the radiant heat of the heater is applied to the streaks of the tubular film between the pressing guide and the guide member.
By making the heater non-contact with the streaks of the tubular film, the radiant heat can be irradiated also around the streaks, but in the present invention, the pressing guide and the guide member cover the two surfaces forming the corners of the tubular film. It is possible to prevent the radiation around the streak and prevent damage.

Further, the bag-forming tube has a hem projecting projection for projecting a palm seal portion in which both ends in the width direction of the tubular film are overlapped at the corner of the bag-making tube, and the guide member is provided with a hem pressing projection that projects to one side. The joint seal part may be formed by cooperation between the protruding protrusion and the pressing guide, and the joint sealing part may be heat-sealed between the sealing surface forming the side wall of the pressing guide with a sealer.
When the tubular film travels through the bag-making tube, the palm seal part protrudes outward with the hem protrusions provided at the corners, and the palm seal part is molded with the hem pressing protrusions and the pressure guide, and heat sealed with the sealer By doing so, heme can be formed.
As another invention, the guide member has a gap in the center in the width direction, the both ends of the tubular film in the width direction are overlapped from the gap to project the palm seal part, and the palm seal part is heated and sealed by a sealer. You may make it do.
By providing a gap between the guide members at a position other than the corner of the tubular film, projecting the palm seal portion where the both ends in the width direction are overlapped, and heat-sealing, the longitudinal seal of the tubular film can be performed.

The pressing guide and the guide member are opposed to the bag making tube with the first and second side surfaces of the tubular film interposed therebetween, and the position of one or both of the pressing guide and the guide member with respect to the bag making tube is adjusted. You may provide the adjustment mechanism made possible.
Even when bags with different dimensions are manufactured, the position of the pressure guide and the guide member can be adjusted by the adjustment mechanism, and the heater position can be adjusted in the diagonal direction of the bag-making tube.

  By making the heater face the non-contacting face of the tubular film formed on the protrusion and radiating heat by heating, the portion along the protrusion can be scored without damaging the tubular film with heat. Since the film is protruded and deformed by a pressing force from one surface by a protrusion provided on the bag-making tube, it is less likely to be scratched as compared with a configuration in which the cylindrical film is pressed from both sides.

Hereinafter, a bag making and filling apparatus with a line mechanism according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 (a) is a diagram showing a main part configuration of a bag making and filling apparatus with a line mechanism, (b) is a diagram showing a gusset bag obtained by the bag making and filling apparatus, and FIG. 2 is a line mechanism in the bag making and filling apparatus. 3 is a partial perspective view showing the bag making tube of FIG. 2, FIG. 4 is a view showing the relationship between the protrusion of the bag making tube and the corner heater, and FIG. 5 is a horizontal sectional view showing the adjustment mechanism of the streak mechanism 6 (a) to 6 (d) are process diagrams showing a line forming process and a heat sealing process.
In the bag making and filling apparatus 1 shown in FIG. 1A, for example, a rectangular tube making tube 2 (hereinafter simply referred to as a bag making tube) having a substantially square cross section is arranged in the vertical direction, and the vicinity of the upper portion of the bag making tube 2. Is attached with a square tube bag making guide 3 (hereinafter simply referred to as a bag making guide). Between the outer peripheral surface of the bag-making tube 2 and the inner peripheral surface of the bag-making guide 3, a space having a substantially rectangular shape in plan view through which the film passes is provided.
A film roll (not shown) for winding a sheet-like film is provided on the side or lower side of the bag-making tube 2, and the film fed from the film roll is folded by a bag-making guide 3 to make a bag. It passes through the space between the tubes 2, is folded into a substantially rectangular tube shape along the outer peripheral surface of the bag-making tube 2, and is sent downward. The film is formed into a rectangular tube shape by the bag making guide 3, and both end portions in the width direction are shifted to the corners of the bag making tube 2 to form a palm seal portion h1 (see FIG. 6A). ).

In the bag making tube 2, a hem forming mechanism 5 and a scoring mechanism 7 are provided below the bag making guide 3. Below that, along the outer peripheral surface of the bag-making tube 2, the film f that is formed into a substantially rectangular tube shape and conveyed is pressed against each short side surface 2 b of the bag-making tube 2, and is intermittently fed downward and conveyed. A feeding belt 8 is provided for this purpose. Further, below the feeding belt 8, a gusset claw 9 for folding the lower end (and the upper end) of the film f formed in a rectangular tube shape below the lower end of the bag making tube 2 into a flat plate shape to form a gusset bag F. A horizontal sealer 10 that seals the upper and lower sides of the gusset bag F in the horizontal direction and a cutter 11 that cuts the middle of the horizontal seal portion in the horizontal direction are provided on the lower side.
A bag making and filling apparatus 1 shown in FIG. 1 (a) is configured to convey and fill contents into a gusset bag F whose bottom is laterally sealed through the bag making tube 2. When filling the granular material as the contents, the auger funnel tube is inserted to the lower end of the bag making tube 2.
Further, FIG. 1B shows a perspective view of the gusset bag F manufactured by the bag making and filling apparatus 1. The gusset bag F has a substantially rectangular tube shape, and a hem h in which a palm seal part h1 is heat-sealed protrudes into a pleat with a predetermined width at one of the four corners on the side surface. In addition, streaks m are formed in the vertical direction at the other three corners. The bottom surface and the top surface are each folded and sealed on a plane to form a bottom seal portion S1 and an opening seal portion S2. In particular, the bottom surface is formed in a substantially flat shape by gusset claws 9.

Next, the hem formation mechanism 5 and the scoring mechanism 7 will be described with reference to FIGS. 2 to 5 using the bag making and filling apparatus 1 shown in FIG.
In FIG. 2, the bag making tube 2 having a square cross section, for example, a rectangular shape, is provided with a scoring mechanism 7 and a hem forming mechanism 5 below the bag making guide 3. The bag-making tube 2 is a perspective view shown in FIG. 3, and is composed of, for example, a pair of long side surfaces 2 a, 2 a that are opposed to each other and have a pair of short side surfaces 2 b, 2 b that are opposed to each other. ing. The pair of long side surfaces 2a, 2a are formed with protrusions 13 in a direction extending the surfaces to both sides in the width direction. In other words, each protrusion 13 is formed at the four corners of the bag-making tube 2 so as to protrude in a direction perpendicular to the short side surfaces 2 b and 2 b. Each protrusion 13 is formed in a strip shape in the vertical direction over substantially the entire length of the bag-making tube 2.
And on one long side surface 2a, a guide wall 14 (guide member) is held in a stationary state with a side surface f1 (first side surface) of the rectangular tube-shaped film f interposed therebetween. The guide wall 14 has a substantially inverted L-shaped plate shape, and the wide portion is formed as a hem-pressing protrusion 14a so as to protrude from the long side 2a of the bag-making tube 2 to one side, and is continuous below the hem-pressing protrusion 14a. The base 14b is set to have the same width as the long side surface 2a.

A pair of pressing guides 15 and 16 are provided on the pair of short side surfaces 2b and 2b with the side surfaces f2 and f2 (second side surfaces) of the film f interposed therebetween (see FIGS. 2 and 4). The pressing guides 15 and 16 are formed in, for example, a substantially rectangular plate shape with a predetermined thickness, and the width in the short side direction is slightly narrower than the width of the short side surface 2 b partitioned by the pair of protrusions 13 and 13. As shown in FIG. 2, the upper portions 15 a and 16 a of the pressing guides 15 and 16 have a convex curved surface, and the upper portions 15 a and 16 a are also formed with a convex curved surface at a portion contacting the side surface f <b> 2 of the film f. (See FIG. 6 (a)). One pressing guide 15 is accommodated in a recess formed by the short side surface 2b of the bag making tube 2 and the projection 13 and the hem pressing projection 14a of the guide wall 14, and the other pressing guide 16 is the short side surface 2b of the bag making tube 2. And a pair of protrusions 13, 13. Therefore, the side surface f2 of the rectangular tube-shaped film f can be smoothly passed between the concave portions and the pressing guides 15 and 16, respectively.
Further, a back plate 17 (guide member) for pressing the side surface f1 of the rectangular tube-shaped film f is provided on the opposite side of the guide wall 14 with the bag making tube 2 interposed therebetween (see FIG. 6B).
Therefore, in the rectangular tube-shaped film f passing through the outer peripheral surface of the bag-making tube 2, the palm seal part h1 is sandwiched between the hem holding projection 14a and the pressing guide 15 at one corner, and the other three corners are Lines m projected by the protrusions 13 are formed (see FIG. 6A). In addition, a hem take-out protrusion 18 for projecting and forming a palm seal part h1 of the square tubular film f is provided at the corner of the bag-making tube 2 located on the upstream side of the hem holding protrusion 14a. This hemming protrusion 18 protrudes further on the extension of the long side surface 2 a in the width direction than the protrusion 13. In addition, the protrusion 13 does not need to be provided at the corner portion having the hem protrusion protrusion 18.

Further, at the other three corners of the bag-making tube 2, emphasis protrusions 20 are formed by further protruding the protrusions 13 by a width “a” at substantially the same height as the hem protrusion protrusions 18. The embossing protrusions 20 further project the streaks m of the rectangular tube-shaped film f to clarify the streaks. In addition, it is preferable that at least the upper end portion is formed in an inclined line shape and has a substantially trapezoidal shape so that the emphasis protrusion 20 and the hem protrusion protrusion 18 can smoothly guide the traveling rectangular tube film f that descends. .
Further, the side surface in the thickness direction of the pressing guide 15 facing the hem projecting portion 18 constitutes a seal surface 15b. A hem sealer 21 is provided in a space below the hem pressing protrusion 14a of the guide wall 14. The hem sealer 21 can be moved forward and backward with respect to the seal surface 15b of the pressing guide 15 by the cylinder 22, and the hem sealer 21 and the seal surface 15b are heat-sealed with the joint seal portion h1 interposed therebetween. The hem sealer 21 also serves as a vertical sealer.
Here, the hemming protrusion 18, the guide wall 14, the pressing guide 15, the hem sealer 21, and the cylinder 22 of the bag-making tube 2 constitute a hem forming mechanism 5.

Further, a substantially L-shaped corner heater 23 in plan view is provided on the outside of the emphasis protrusion 20 of the bag-making tube 2, and the corner heater 23 has a heater portion 23 b inside and is diagonally formed by the cylinder 24 in the diagonal direction of the bag-making tube 2. Are arranged to be movable back and forth. The corner heater 23 heats the streaks m forming the continuous edge line of the rectangular tube-shaped film f formed by the embossing protrusions 20 provided at the corners of the bag-making tube 2 to fix them by plastic deformation. The corner heater 23 is held in a non-contact state in proximity to the line m of the film f at the time of heating, and the line m is heated by the radiant heat radiated from the L-shaped heating surface 23a in plan view of the corner heater 23.
Moreover, during the radiant heating by the corner heater 23, the film side surfaces f1 and f2 on the long side surface 2a and the short side surface 2b are shielded by the pressing guide 15 and the back plate 17 on both sides of the emphasis projection 20 that forms the line m. It can suppress that radiant heat is radiated | emitted to area | regions other than the line m.
The protrusion 13, the emphasis protrusion 20, the corner heater 23, and the cylinder 24 of the bag-making tube 2 constitute a streaking mechanism 7. The scoring mechanism 7 is provided at each of the other three corners of the bag-making tube 2 except for the corners having the hem protrusions 18.

The hem forming mechanism 5 and the line weighting mechanism 7 according to the present embodiment can be applied to the gusset bags F having different sizes to form the hem h and the line m and heat-seal. Next, the adjustment mechanism 26 of the hem formation mechanism 5 and the scoring mechanism 7 will be described.
In the adjustment mechanism 26 of the bag making and filling apparatus 1 shown in FIG. 5, a substantially rectangular frame portion 27 is provided substantially concentrically so as to surround the bag making tube 2. The frame portion 27 is formed in, for example, a rectangular shape by the first frame portions 28, 28 on one opposite two sides and the second frame portions 29, 29 on the other opposite two sides. One opposing frame portion 28, 28 is connected and supported by the main body frames 30, 30 of the bag making and filling apparatus 1.
The operation parts 31 and 31 are connected to the center part in the length direction of the other frame parts 29 and 29. Slide shafts 32 and 32 connected to the guide wall 14 and the back surface of the back plate 17 are slidably supported by the operation units 31 and 31, respectively. Then, the guide wall 14 and the back plate 17 are moved back and forth with respect to the bag making tube 2 by sliding the slide shaft 32 with the operation member 31a provided in each operation portion 31, and the first side of the film f on the long side surfaces 2a and 2a. The advancing positions of the guide wall 14 and the back plate 17 can be arbitrarily set so that the side surfaces f1 and f1 come into contact with each other.

The pressing guides 15 and 16 which can be moved back and forth with respect to the pair of short side surfaces 2b and 2b of the bag-making tube 2 are supported by shaft portions 33 and 33, and each shaft portion 33 is a slide frame 34 substantially parallel to the slide shaft 32. It is fixed to. Each slide frame 34 is provided with support arms 34 a slidable along the second frame portions 29, 29 connected to both ends thereof. Racks 35, 35 are connected to each support arm 34a.
On the other hand, pinions 36 and 36 meshing with the racks 35 are rotatably supported by the second frame portions 29 and 29. The pinions 36 and 36 are coaxially connected by a bar, and both the pinions 36 and 36 are connected to an operation handle 38 provided on one second frame portion 29 so as to be rotatable. Therefore, by rotating the operation handle 38, the slide frame 34 and the pressing guides 15 and 16 can be moved forward and backward with respect to the short side surfaces 2b and 2b of the bag-making tube 2 through the rack 35 by the integrally rotating pinion 36. Adjusted. Thereby, the stationary position of the pair of pressing guides 15 and 16 can be adjusted.
Further, the pressing guides 15 and 16 are integrally fixed to the slide frame 34 by a set screw 39 integrally with the shaft portion 33, and can be removed and replaced integrally when the size of the gusset bag F is changed.
In this way, the position of the guide wall 14, the back plate 17, and the pressing guides 15 and 16 can be adjusted according to the size of the gusset bag F. Depending on the size of the gusset bag F, the bag-making tube 2 and the bag-making guide 3, the guide wall 14 with the slide shaft 32, the back plate 17 and the pressing guides 15 and 16 with the shaft portion 33 have the required dimensions. It will be replaced and installed.
Further, also in the scoring mechanism 7, the mounting position of the corner heater 23 with respect to the cylinder 24 can be adjusted. Therefore, as shown in FIG. 6B, the cylinder 24 is provided with a long hole 24a for adjusting the fixed position of the corner heater 23.

The bag making and filling apparatus 1 according to the present embodiment is configured as described above, and the operation thereof will be described with reference to FIG.
1 and 5, the bag making tube 2, the bag making guide 3, the guide wall 14, the back stage 17, and the pressing guides 15 and 16 are appropriately set according to the size of the gusset bag F to be manufactured, and further an adjustment mechanism. 26, the stationary positions of the guide wall 14 and the back stage 17 and the stationary positions of the pressing guides 15 and 16 are set.
In FIG. 1, a continuous belt-like film f fed out from a film roll (not shown) is folded by a bag-making guide 3 provided on the upper part of a substantially rectangular tube-shaped bag-making tube 2 and a gap with the bag-making tube 2. And is formed into a substantially rectangular tube shape and intermittently conveyed downward along the bag-making tube 2 by the feeding belt 8. The film f having a rectangular tube shape passes between the bag-making tube 2 and the guide wall 14, the back stage 17, and the pressing guides 15 and 16 that surround the four surfaces. The joint seal portion h1 formed by combining both end portions in the width direction of the rectangular tube-shaped film f is positioned at one corner portion having the hem projecting portion 18 of the bag-making tube 2.
Then, as shown in FIG. 6A, the palm seal portion h1 of the film f is formed so as to protrude on the extension of the long side surface 2a by the hem protruding protrusion 18 at the corner of the bag making tube 2. On the other hand, the projections 13 provided at the other three corners of the bag-making tube 2 respectively form the streak m in a substantially square tube-like film f projecting outward in the long side surfaces 2a and 2a. In this case, both sides of each line m are pressed against the long side surface 2a and the short side surface 2b by the pressing guides 15 and 16 and the guide wall 14 or the back plate 17.

Next, as shown in FIG. 6 (b), each line m is formed so as to protrude further by running on the emphasis protrusion 20 that protrudes further outward from the protrusion 13 so as to be an edge line continuous in the vertical direction. Be pulled. As a result, even if the streak m by the protrusion 13 has a slightly slender curvilinear shape, the sharp streak m can be surely formed. At this position, a corner heater 23 having a substantially L shape in plan view is arranged at intervals in each line m, and is heated by radiant heat radiated from the heating surface 23a of the corner heater 23. The streak m of the film f is plastically deformed by radiant heat, and the shape is fixed and fixed as a sharp vertical streak m.
Moreover, the palm seal part h1 of the film f is formed by passing between the hem pressing projection 14a of the guide wall 14 and the sealing surface 15b of the pressing guide 15. Thereby, the palm seal part h1 is protruded and held in the horizontal direction along the long side surface 2a, and is prevented from being deformed or collapsed by preventing it from spreading radially.
The base portion 14b does not protrude from the long side surface 2a below the hem pressing protrusion 14a of the guide wall 14, but the palm seal portion h1 maintains its shape. Since the pressing guide 15 is provided not only in the region of the hem pressing projection 14a of the guide wall 14 but also to the lower end of the base portion 14b and presses the film f against the short side surface 2b, the palm seal portion h1 extends over the entire length of the base portion 14b by transporting the film f. Formed.

In this state, the conveyance of the film f is stopped, each hem sealer 21 is heated, and as shown in FIGS. 2 and 6C, the air cylinder is driven and the hem sealer 21 uses the hem sealer 21 to seal the palm seal part h1. It is pressed against the surface 15a and sandwiched and heat sealed. Since the both ends of the film f in the width direction of the film f overlap each other, the film f can be vertically sealed in a rectangular tube shape by heat-sealing to form a hem h.
Even in the stopped state, radiation heating of the line m on the emphasis protrusion 20 by each corner heater 23 is performed.
Thus, the hem h is formed along the longitudinal direction at one of the four corners of the rectangular tube-shaped film f, and the streak m is formed along the longitudinal direction at the other three corners (FIG. 6 (d)).
Next, the feeding belt 8 is actuated to intermittently convey the rectangular tube film f downward on the bag-making tube 2 so that the hem h and the three lines m are continuously provided at the four corners of the rectangular tube film. Sequentially formed.

At the end of the intermittent conveyance, the lower side of the substantially rectangular tube-shaped film f is folded into a flat shape by the short side surfaces 2b and 2b being folded inward by the gusset claws 9. And the part folded by planar shape is heat-sealed with the horizontal sealer 10, and a horizontal seal part is divided | segmented up and down with the cutter 11 after that.
Then, the upper substantially rectangular tube-shaped film f is formed in the gusset bag F, and is transported downward by a predetermined length by the feeding belt 8 and stopped in the bag through the inner space of the bag-making tube 2. Fill the contents. Next, the folded portion on the upper plane is heat-sealed by the horizontal sealer 10, and the horizontal seal portion is cut up and down by the cutter 11, so that the bottom seal portion S1 of the upper gusset bag F and the opening of the lower gusset bag F are opened. The seal portion S2 is configured. Thus, the gusset bag F is manufactured as shown in FIG. By repeating these steps, the hem set gusset bag F filled and sealed with the contents is sequentially manufactured.

Next, the adjustment mechanism 26 of the hem formation mechanism 5 and the scoring mechanism 7 will be described with reference to FIG. When the gusset bag F to be manufactured is manufactured by switching to one having different vertical and horizontal dimensions, the bag-making tube 2 and the bag-making guide 3 are first exchanged with ones having corresponding dimensions. The guide wall 14, the back plate 17, and the pressing guides 15 and 16 are also appropriately replaced according to the vertical and horizontal dimensions of the gusset bag F. The position of the hemsealer 21 is also adjusted. For the guide wall 14 and the back plate 17, the slide shaft 32 is slid by the operation portion 31 to advance and retract the guide wall 14 and the back plate 17, and the gap between the long side surfaces 2 a and 2 a of the replaced bag making tube 2. Is adjusted and fixed to a size suitable for passing the film f and forming the hem h and the line m.
Further, by operating the operation handle 38 to rotate each pinion 36, the rack 35 is advanced and retracted along the second frame portion 29, and the pressing guides 15 and 16 are moved to the short side surfaces 2b and 2b via the slide frame 34. On the other hand, the position can be adjusted so as to form a gap through which the film f passes. For each corner heater 23, the fixing position on the long hole 23a of the cylinder 24 is adjusted so that the heating surface 23a has a slight gap from the streak m of the rectangular tubular film f. The position of the hem sealer 21 is adjusted in the same manner.
Thus, by adjusting the setting positions of the guide wall 14, the back plate 17, and the pressing guides 15 and 16 according to the vertical and horizontal dimensions of the gusset bag F, gusset bags F having different dimensions can be manufactured.

As described above, the bag making and filling apparatus 1 for the gusseted bag F according to the present embodiment can form sharp lines m from the inside of the film f by the emphasis protrusion 20 in addition to the protrusion 13. Further, the streak m can be plastically deformed by the radiant heat of the corner heater 23, and radiant heating can be performed only on the streak m. Therefore, it is possible to produce a beautiful gusset bag F by preventing the square tubular film f from being damaged by heat, the protrusion 13 and the emphasis protrusion 20. Moreover, since the corner heater 23 can advance and retreat in the diagonal direction of the bag-making tube 2, it can easily cope with the shape change of the gusset bag F.
Moreover, it is possible to prevent the hem h from becoming bulky by forming the hem hushing protrusion 14a so as to follow the hem holding protrusion 14a while suppressing the hem h from spreading radially outward. Further, when the hem h is heat-sealed, the heat of the hem sealer 21 is transmitted to the seal surface 15a of the pressing guide 15 through the hem h and is also heated by the conduction heat from the pressing guide 15. Facilitates folding. And since the heat | fever of the hem sealer 21 is discharged | emitted from the press guide 15 via hem h and heat | fever is lowered | hung, it can prevent reliably that hem h contracts to the press guide 15 side and spreads radially, and the gusset bag F becomes bulky. Can be prevented.

Next, a bag making and filling apparatus 40 according to a second embodiment of the present invention will be described with reference to FIGS. 7 to 9. The same reference numerals are used for the same or similar members and parts as those in the first embodiment. Description is omitted.
In the gusset bag F1 manufactured by the bag making and filling apparatus 40 according to the second embodiment, as shown in FIG. 7, the joint seal portion S3 composed of both ends in the width direction of the film f is a corner portion in the vertical direction of the gusset bag F1. Instead, it is formed at the center of the long side surface F1a, and the palm seal portion S3 has a configuration in which the upper and lower ends are fixed by the bottom seal portion S1 and the opening seal portion S2 in close contact with the long side surface F1a.
As shown in FIGS. 8 and 9, the bag making and filling apparatus 40 according to the second embodiment is provided with a bag making guide 3 on the upper portion of a substantially square tube-shaped bag making tube 2. At the four corners of the bag-making tube 2, projections 13 are formed so as to protrude on both sides in the width direction of the long side surfaces 2 a. On the lower side of the bag making guide 3, a palm seal guide portion 42 is formed for contacting both ends in the width direction of the film f formed into a rectangular tube shape by the bag making tube 2 and the bag making guide 3. By this joint seal guide portion 42, both end portions in the width direction of the film f are bent in the outward direction substantially orthogonal to the long side surface 2a of the bag-making tube 2 and brought into contact with each other to form the joint seal portion S3.

This palm seal portion S3 is sandwiched and heat-sealed by a vertical sealer 43 provided in the region of the feeding belt 8. In the vertical sealer 43, the vertical sealers 43a and 43a each incorporating a heater portion are disposed so as to be openable and closable with the palm seal portion S3 interposed therebetween, and the vertical sealers 43a and 43a are mutually connected when the film f is conveyed by the feeding belt 8. When the film f is stopped, it is in a closed state in which the palm seal portion S3 is sandwiched and heated and sealed (see FIG. 8).
A scoring mechanism 44 is provided between the joint seal guide portion 42 and the vertical sealer 43. The scoring mechanism 44 is provided with emphasis protrusions 20 that project the protrusions 13 of the rectangular tube 2 further outward, and the corner heater 45 is opposed to the streaks m of the film f formed on the emphasis protrusions 20. Each is provided. The corner heaters 45 are respectively disposed to face the four corners of the bag-making tube 2. Each corner heater 45 has a heater portion 45a accommodated therein, and the heating surface 45b facing the line m of the film on the emphasis protrusion 20 forms a substantially L-shape in plan view so as not to contact the line m of the film. There is a slight gap.
The corner heaters 45, 45 facing the emphasis protrusions 20, 20 at the two corners of the short side surface 2b are connected to a single cylinder 46, and these corner heaters 45, 45 are integrally formed in a direction substantially parallel to the long side surface 2a. The bag-making tube 2 which can be advanced and retracted and has different dimensions can be used. Corner heaters 45 and 45 having the same configuration and a cylinder 46 are disposed so as to face the opposing short side surface 2b. Note that the corner heater 45 may be configured such that a cylinder is individually attached so that the corner heater 45 can be advanced and retracted individually.

Further, in the scoring mechanism 44, pressing guides 15 and 16 are disposed on the short side surfaces 2b and 2b of the bag-making tube 2, respectively, and the short side surface 2b and the protrusions 13 and 13 and the emphasis protrusions 20 and 20 on both sides thereof Since the pressing guides 15 and 16 are positioned in the concave portions formed of the above, the lines m and m are formed on the film f, respectively.
Further, a back plate 17 and a front plate 46 are provided so as to face the long side surfaces 2a and 2a so as to sandwich the film f so as to pass therethrough. The front plate 46 is divided into two in the vertical direction through the gap 46a so that the palm seal portion S3 projects at the center of the long side surface 2a so as to allow the palm seal portion S3 to project.
At each corner of the film f formed in a rectangular tube shape, the pressing guide 15 or 16 and the back plate 17 or the front plate 46 are located on both sides in the horizontal direction of the line m that is sharply formed by the emphasis protrusion 20, and the long side surface. It is set as the arrangement | positioning structure which covers the film f on 2a and the short side surface 2b. Therefore, when the film f on the emphasis protrusion 20 is radiantly heated by the corner heater 45, damage other than the streaks m is covered with the pressing guide 15 or 16 and the back plate 17 or the front plate 46, so that damage due to heat can be prevented.

Since the bag making and filling apparatus 40 according to the present embodiment has the above-described configuration, the film f that has passed through the bag making tube 2 and the bag making guide 3 is formed into a substantially rectangular tube shape, and both ends of the film f in the width direction are further formed. The joint seal portion S3 is formed with the joint seal guide portion 42. Then, the film f forms sharply bent lines m by passing the protrusions 13 and the emphasis protrusions 20 provided at each corner of the bag-making tube 2. At the same time, the corner heater 45 provided in a non-contact manner at each corner is heated so that the stripe m is fixed by radiant heat and the stripe m is plastically deformed.
Therefore, the film f is fed in a state where the line m is maintained even below the bag-making tube 2 where the emphasis protrusion 20 is not provided. When the rectangular tubular film f passes through the scoring mechanism 44, the palm seal part S3 is fed in a state of protruding from the gap 46a of the front plate 46.
In the area of the vertical sealer 43, the feeding of the film f intermittently conveyed by the feeding belt 8 is stopped. Then, the open sealers 43a and 43a are closed and heat-sealed with respect to the joint seal portion S3 protruding from the gap 46a of the front plate 46, and are heat-sealed. As a result, the palm seal portion S3 is vertically sealed.
At the end of the intermittent conveyance, the short side surfaces 2b and 2b are folded into a flat shape by the gusset claw 9 on the lower end side of the substantially rectangular tube-shaped film f, and both sides are pressed together with the palm seal part S3 by the horizontal sealer 10 and heat sealed. The horizontal seal portion is divided into upper and lower portions by a cutter 11. Then, the upper rectangular tube-shaped gusset bag F is conveyed downward by a predetermined length, and the bag is filled with contents. The folded portion on the upper plane is pressed with the horizontal sealer 10 together with the palm seal part S3 and heat-sealed, and the horizontal seal part is cut up and down with the cutter 11 to produce the gusset bag F1.
By repeating such steps, gusset bags F1 filled and sealed with the contents are sequentially manufactured.

In each of the above-described embodiments, the gusset bags F and F1 are formed in a substantially rectangular tube shape having a substantially square cross section. However, the gusset bags manufactured according to the present invention are not limited to this, and various types of gusset bags. A gusseted bag of an appropriate shape such as a rectangular tube shape, a substantially cylindrical shape, or a substantially oval tube shape can be manufactured, and any bag may be used as long as it has one or more lines m.
Further, in each of the embodiments described above, the emphasis protrusion 20 is formed in addition to the protrusion 13 at the position facing the corner heaters 23 and 45 with respect to the protrusion 13 for forming the line m on the film f. Radiation heating may be performed by the corner heaters 23 and 45 in a state in which only the projection 13 is formed without providing the projection 13, and in this case, the line m can be fixed.

(A) is a figure which shows the principal part structure of the bag making and filling apparatus with a streak mechanism by embodiment of this invention, (b) is a gusset bag obtained with the bag making and filling apparatus of (a). It is a principal part perspective view of the streaking mechanism and hem formation mechanism in a bag making filling apparatus. It is a fragmentary perspective view of a bag making tube. It is a principal part top view which shows the relationship between the emphasis protrusion of a bag making tube, and a corner heater. It is a top view which shows the adjustment mechanism of a streak formation mechanism and a hem formation mechanism. (A)-(d) is process drawing which shows the formation process of a streak, and a heme formation process. It is a gusset bag obtained by the bag making and filling apparatus according to the second embodiment. It is a principal part front view which shows a scoring mechanism and a palm seal part formation mechanism. FIG. 9 is a plan view of the line weighting mechanism shown in FIG. 8.

Explanation of symbols

1, 40 Bag making and filling equipment (bag making equipment)
2 Bag making tube 3 Bag making guide 7 Streaking mechanism 13 Protrusion 14 Guide wall (guide member)
15, 16 Pressing guide 17 Back plate (guide member)
20 Emphasis protrusion 23, 45 Corner heater (heater)
46 Front plate (guide member)
f Film F, F1 Gusseted bag (bag)
f1 first side face f2 second side face h1, S3 joint palm seal part h hem m streak

Claims (6)

In a bag making apparatus in which a film is wound around a bag making tube to form a tubular film, and a line is formed on the side surface of the tubular film,
A protrusion formed at the corner of the side surface of the tubular tube that passes through the bag-forming tube, and a protrusion that faces the protrusion through the tubular film and is not in contact with the tubular film And a heater disposed on the bag, and the streak mechanism of the tubular film is fixed by the radiant heat of the heater.   The bag making apparatus provided with the scoring mechanism according to claim 1, wherein an emphasis protrusion that protrudes further than the protrusion is formed in a region of the protrusion facing the heater.   The basis weight according to claim 1 or 2, wherein the heater has an L-shaped heating surface in cross section facing the protrusion and can be adjusted in position in a diagonal direction of the bag-making tube. A bag making device equipped with a mechanism.   A pressing guide that sandwiches the tubular film is disposed on one side surface that forms a corner portion having a protrusion of the bag-making tube, and a guide member is disposed on the other side surface with the tubular film sandwiched therebetween, The bag making apparatus provided with the scoring mechanism according to any one of claims 1 to 3, wherein radiant heat of the heater is applied to a streak of the tubular film between the pressing guide and the guide member.   A hem protrusion protrusion for projecting a palm seal portion in which the widthwise both ends of the tubular film are overlapped at a corner of the bag-making tube, and the guide member includes a hem pressing protrusion protruding to one side, The joint seal part is formed by cooperating with the hem protrusion and the pressure guide, and the joint seal part is heat-sealed between the seal surface that forms the side wall of the pressure guide by a sealer. A bag making apparatus comprising the scoring mechanism according to claim 4. The guide member has a gap in the center portion in the width direction, the both ends of the tubular film in the width direction are overlapped from the gap to project the palm seal portion, and the palm seal portion is heated and sealed with a sealer. A bag making apparatus comprising the scoring mechanism according to claim 4.

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