JP4532227B2 - Folding device for bag making filling and packaging machine - Google Patents

Description

  The present invention forms a packaging material to form various bags such as gusset bags, preferably filled with various contents such as powder and granules in the bag making process and sealed. The present invention relates to a crease forming apparatus configured to form a crease in a packaging material in a bag making process of a bag making filling and packaging machine.

In general, there are those described in Patent Documents 1, 2, and 3, for example, as bag making and filling and packaging machines.
In the bag-filling and packaging machine described in Patent Document 1, the film is scored by passing it through a stitching device before supplying the film to the former. Then, the film is supplied to the former to make a bag.
In the bag making filling and packaging machine described in Patent Document 2, a cylindrical web wound in a rectangular tube shape along the rectangular tube portion of the bag making cylinder of the bag making filling and packaging machine is formed from the corner portion of the square tube portion. By passing between the protruding V-shaped projection and the V-shaped groove of the opposing roller, the cylindrical web is sandwiched between the V-shaped projection and the V-shaped groove of the roller, and bent outward at an acute angle to form a crease. I am doing so.
Further, in the filling and packaging machine described in Patent Document 3, in the process of feeding the film formed into a cylindrical shape descending through the cylindrical portion of the bag-making mechanism, it is in sliding contact with the guide piece top portion of the bending guide. Corners are formed. Further, the corner portion of the tubular film is elastically pressure-clamped by two rollers in the roller forming tool, and the folded edge portion that is folded in two forms a crease line.
Japanese Utility Model Laid-Open No. 7-11509 JP-A-9-95319 JP-A-55-163109

However, in the streaking device described in Patent Document 1, in order to form a crease in a film in a sheet state before bag making, if the bag is made into a cylindrical shape after that, the position of the crease may be shifted in the circumferential direction. There was a bug. Moreover, in the thing of patent document 2, in order to form a crease in a film using a square filling cylinder, compared with a cylindrical filling cylinder, the filling cylinder (auger) which supplies a filling inside a cylindrical film Since the diameter was reduced and the filling amount per unit time was reduced, the bag filling speed was not increased.
In the bag making and filling machine described in Patent Document 3, the corner of the cylindrical film formed by the guide piece of the filling cylinder is sandwiched between two rollers, so that the cylindrical film needs to have a margin for the width dimension accordingly. Therefore, the diameter of the filling cylinder had to be relatively reduced. As a result, the diameter of the filling cylinder is also reduced, and the filling speed is reduced. Further, when the size of the tubular film is changed, the guide pieces must be exchanged together with the filling tube, and the positions of the rollers at the four corners must be changed, respectively.

  In view of such circumstances, an object of the present invention is to provide a crease device for a bag-filling and packaging machine that is accurately and clearly creased to improve the filling speed of contents.

The crease device according to the present invention is a crease device for a bag making filling and packaging machine in which a wrapping material is formed into a cylindrical wrapping material along a bag making tube, and a crease is formed on a side surface of the cylindrical wrapping material. And a heater provided on the side surface of the bag-making tube and a heater that contacts the protrusion via the cylindrical packaging material, and the heater is a heater that is in contact with the protrusion and a heater that is separated from the protrusion by a small distance. It has a corner portion of the surface, and is characterized in that two folds are formed by sandwiching the tubular packaging material passing by the projection portion and the heater.
According to the present invention, a sharp creasing is performed by bringing a heater into contact with a protrusion provided on a bag-making tube via a cylindrical packaging material and heating the cylindrical packaging material with a crease. Can do. In addition, the bag-making tube can be made relatively large at the time of folding, and the filling speed of the contents can be increased.
In addition, when the crease is formed, two folds are formed at a minute interval between the projection and the corner portion of the heater surface in the cylindrical packaging material. Looks like a crease line. Therefore, when forming a crease line between the protrusion and the heater surface, the tubular packaging material is not damaged as compared with the case where the cylindrical packaging material is sandwiched between the protrusion and the corner. In addition, since the cylindrical packaging material is flexible, even if one crease line is insufficient, a crease can be secured by the other crease line. Moreover, since the fold can be formed without sandwiching the cylindrical packaging material between two rollers or fitting between the V-shaped convex part and the concave part, the conveyance resistance is applied when creasing while conveying the cylindrical packaging material. With less wear, clear creases can be formed.

Moreover, it is preferable that a mounting hole is formed in the bag-making tube, the protruding portion is formed in the protruding member, and the protruding member is provided with an engaging portion that engages with the mounting hole. The crease position formed on the cylindrical packaging material can be changed by attaching and detaching the protruding member.
The projecting member may be provided with a plurality of projecting portions, and may be provided with a position adjusting means for adjusting the position of the heater so as to selectively contact any of the plurality of projecting portions.
If you select one of the multiple protrusions and operate the position adjustment means so that the heater comes into contact with it, you can change the bag size, fold position, bag bottom shape, etc. without changing the bag-making tube Corresponding folds can be formed.
In addition, a plurality of mounting holes may be formed in the bag making tube, and instead of the protruding member, a closing member not provided with a protruding portion may be mounted on the bag forming tube.
By replacing all protruding members with closing members, it is possible to form an unfolded cylindrical packaging material. For example, even when changing from a gusset bag to a flat bag to make a bag, it can be manufactured without replacing the bag-making tube. .

According to the present invention, since the crease is formed after the cylindrical packaging material is formed, the crease position can be accurately formed without shifting during the bag making process. In addition, since the bag-making tube can be formed in a substantially cylindrical shape together with the cylindrical packaging material, the bag-making tube can be set larger than the case of making the bag-making tube into a rectangular tube shape, and the filling operation can be accelerated. In addition, since the packaging material is not sandwiched between rollers when forming the crease, the tubular packaging material is less likely to be taken in the width direction for forming the crease, and the internal space of the cylindrical packaging material can be secured, making a bag. The filling speed can be increased.
In addition, when the crease is formed, two folds are formed at a minute interval between the projection and the corner portion of the heater surface in the cylindrical packaging material. Looks like a crease line. Therefore, when forming a crease line between the protrusion and the heater surface, the tubular packaging material is not damaged as compared with the case where the cylindrical packaging material is sandwiched between the protrusion and the corner. In addition, since the cylindrical packaging material is flexible, even if one crease line is insufficient, a crease can be secured by the other crease line. Moreover, since the fold can be formed without sandwiching the cylindrical packaging material between two rollers or fitting between the V-shaped convex part and the concave part, the conveyance resistance is applied when creasing while conveying the cylindrical packaging material. With less wear, clear creases can be formed.

Hereinafter, a bag making filling and packaging machine according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of a bag making and filling machine according to an embodiment of the present invention, FIG. 2 is a front view of a crease device portion of the bag making and filling machine shown in FIG. 1, and FIG. 3 is a crease device shown in FIG. FIG. 4 is a projection plate to be attached to the bag-making tube, (a) is a plan view, (b) is a front view, (c) is a side view, and FIG. 5 is an arrow A in FIG. FIG. 6 is a view in the direction of the arrow B in FIG. 3, FIG. 7 is a partial horizontal cross-sectional view showing the positional relationship between the protrusion and the heater block, and FIG. 8 is an enlarged view of part C in FIG.
In the bag making filling and packaging machine 1 shown in FIG. 1, for example, a bag making tube 2 having a substantially circular cross section is arranged in the vertical direction, and a film f ′ (wrapping material) is formed in a cylindrical shape near the upper part of the bag making tube 2. A bag making guide 3 to be formed is attached. 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 circular shape in plan view through which the film f 'passes is provided.
In the bag making tube 2, a creasing device 4 for forming creases at the four corners of the tubular film f and a vertical sealer 5 for vertically sealing both end edges of the tubular film are provided below the bag making guide 3. Is provided. Below that, a feeding belt 6 is provided along the outer peripheral surface of the bag making tube 2 for adsorbing the cylindrical film f and intermittently (or continuously) feeding it downward.

Below the feeding belt 6 is a gusset for folding the lower end (and 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 tube shape to form a rectangular tube bag F. A claw 8 is provided, and a lower sealer 9 for horizontally sealing the upper and lower sides of the bag F in the horizontal direction and a cutter (not shown) for cutting the middle of the horizontal seal portion in the horizontal direction are provided on the lower side thereof.
In addition, the bag making and filling apparatus 1 shown in FIG. 1 is configured to convey and fill the contents into the bag F whose bottom is laterally sealed through the bag making tube 2. When filling a granular material as the contents, the bag making tube 2 extends to the bottom of the bag F.
As shown in FIG. 1, the bag F filled with the contents manufactured according to the present embodiment has a substantially rectangular tube shape and is formed by forming horizontal seal portions 101 and 102 at the top and bottom, and vertical seal portions 103 at the side surfaces. Has been. Further, fold lines 104 projecting outward are formed at the four corners of the side surface, and fold lines projecting inward are formed between the two fold lines 104, 104 forming the corners on the two opposing side surfaces of the square tube portion. 105 is formed.

Next, the creasing apparatus 4 will be described with reference to FIGS.
In the creasing device 4 shown in FIGS. 2 and 3, a plurality of, for example, four long holes 11 (mounting holes) are provided at predetermined intervals in the circumferential direction below the bag making guide 3 in the bag making tube 2 in the vertical direction. Is perforated. A projection plate 12 is fitted in each long hole 11.
As shown in FIG. 4, the protruding plate 12 is in the shape of an oblong plate, and the upper surface is formed with protruding portions 13 having, for example, a right triangle shape in sectional view, and the locking portions 12a and 12a provided on both sides of the upper surface are long. It is formed slightly wider than the width of the hole 11. Further, step portions 12b and 12c are formed at both ends in the longitudinal direction of the protruding plate 12 so as to be lowered by one step from the upper surface. One step portion 12b is set to have a longer dimension than the other step portion 12c, and is located on the upper side in the gravity direction.

Then, in a state where the protruding plate 12 is fitted in the long hole 11 of the bag-making tube 2, both the locking portions 12 a and 12 a on the upper surface are locked on both sides of the long hole 11, and the step portions 12 b and 12 c (engagement). Part) is locked in a state of being in contact with the inside of both end portions of the long hole 11. The long hole 11 is longer than the length excluding the step portion 12b from the protruding plate 12, and shorter than the length excluding the step portion 12c. When the projection plate 12 is mounted, it is inserted into the long hole 11 first from the longer end 12b, and is lowered and locked in the direction of gravity.
And as shown in FIG. 3, the heater block 14 is arrange | positioned in the position facing the projection part 13 of each projection plate 12 with which it fitted to the four long holes 11 of the bag making tube 2 so that contact / separation is possible (it can advance / retreat). Has been. The heater block 14 is formed in a rod shape or a plate shape along the longitudinal direction of the protrusion 13. Therefore, the cylindrical film f descending the outer periphery of the bag-making tube 2 is sandwiched and pressed between the protrusions 13 and the heater block 14 when passing through the protrusions 13 and is radiated by the radiant heat of the heater 14. A fold line 104 protruding in a substantially V shape is attached to the outside of the tubular film f.
For example, as shown in FIGS. 7 and 8, the heater block 14 has a corner portion 14c at the intersection of the heater surface 14a and the side surface 14b that form a right angle, for example, and the tubular film f is applied to the heater surface 14a. The projecting portion 13 is in line contact with the corner portion 14c by a minute distance D so as to form a fold line 104. The fold line 104 is composed of two lines formed by the protrusion 13 and the corner part 14c, but since the interval D is very small, it looks almost like a single line. Further, since there is a distance D, it is possible to cope with errors in the positions of the protrusions 13 and the corners 14c. In addition, since the deformation of the tubular film f is not concentrated, the tubular film f is not damaged as compared with the case where the fold is formed by sandwiching the tubular film f between the protrusion 13 and the heater surface 14a. At this time, the flank of the protrusion 13 is inclined so as to be separated from the heater surface 14a by a flank angle θ. This relief angle θ reduces the feeding resistance of the tubular film f.

Next, the heater position adjusting mechanism 16 (position adjusting means) of the creasing apparatus 4 will be described with reference to FIGS.
In the heater position adjusting mechanism 16 shown in FIGS. 3 and 5, two guide rods 17 and 18 are arranged substantially parallel to one side of the bag making tube 2 in the vertical direction, and both ends of the bag are filled and packaged. It is supported by fixed plates 19 and 20 fixed to the entire frames 21a and 21b of the machine 1. In FIG. 3, in a direction perpendicular to the two guide rods 17 and 18, a pair of heater units 23 and 23 supporting the two heater blocks 14 and 14 are arranged opposite to each other with the bag making tube 2 interposed therebetween. It is installed. Moreover, each heater unit 23 is slidably held on the guide rods 17 and 18 by two bearings 24a and 24b shown in FIG.
In FIG. 3, each heater unit 23 is connected to a stay 25 in which two bearings 24 a and 24 b extend in a direction perpendicular to the guide rods 17 and 18. The stay 25 is formed in a substantially U shape in a plan view, and a rotary shaft 27 is rotatably fitted on both side arms 25a and 25b of the U shape. Moreover, the rotary shaft 27 is movable in the axial direction within a range in which the both side arm portions 25a and 25b cannot be detached.

Each rotating shaft 27 is formed with male screw portions 27a and 27b formed by two reverse screws spaced apart from each other, and nut portions 28a and 28b are screwed into the male screw portions 27a and 27b, respectively. Further, holder portions 29, 29 are connected to the nut portions 28a, 28b (see FIG. 6). Cylinders 32 and 32 are fixed to the holder portions 29 and 29, and the above-described heater blocks 14 and 14 are connected to the arm portions 32a and 32a of the cylinders 32, respectively.
Then, by rotating the adjustment grip 33 fixed to one end of the rotating shaft 27, the heater portions 30 and 30 including the nut portions 28a and 28b and the holder portions 29 and 29, the cylinders 32 and 32, and the heater blocks 14 and 14 approach each other. Or move in the direction of separation. Thereby, the Y-axis direction position of the heater block 14 with respect to each protrusion 13 can be adjusted.

In FIG. 2, a substantially L-shaped arm 35 is swingably connected to a holder connected to the stay 25, and a protruding disk 36 (second protruding member) is rotatably supported at the tip of the holder. ing. The protrusion disk 36 is formed with a protrusion 36a (second protrusion) having a substantially triangular cross section on the outer peripheral surface thereof so as to protrude over the entire periphery. And the V-groove 37 which receives the protrusion part 36a on both sides of the cylindrical film f is formed in the surface of the bag making tube 2 facing the protrusion disk 36 (refer FIG. 7). As shown in FIG. 3, a pair of protruding disks 36 are disposed opposite to each other with the bag-making tube 2 interposed therebetween, and are further provided below the central portion between adjacent protruding portions 13 and 13.
Therefore, with respect to the tubular film f descending the outer peripheral surface of the bag-making tube 2, the folds 104 that protrude outward are formed by the adjacent two protrusions 13 and 13 and the heater blocks 14 and 14 of the pair of heater portions 30. After forming 104, a fold line 105 that protrudes inward is formed between the protrusion 36 a of the protrusion disk 36 and the V groove 37 of the bag-making tube 2.

Further, in the heater unit 23 shown in FIG. 6, two support rods 39 and 40 are arranged in parallel above and below the rotation shaft 27 and are supported by both side arm portions 25 a and 25 b of the stay 25, respectively. . The support rods 39 and 40 are fitted and inserted into bearings 41 and 41 mounted in the through holes in the holder portions 29 and 29, and the holder portions 29 and 29 are slidably supported along the support rods 39 and 40. is doing.
Further, a shaft portion 43 with a moving grip 42 for slightly moving each holder portion 29 supported by the rotating shaft 27 is rotatably supported on the arm portion 25a of the rotating shaft 27 on the adjustment grip 33 side. . The pushing member 44 is screwed into the male screw portion 43 a formed on the shaft portion 43. The pushing member 44 is fixed to the rotating shaft 27 by being sandwiched between a step portion 27 c provided on the rotating shaft 27 and a stop ring 27 d. When the pushing member 44 is moved in the longitudinal direction of the rotating shaft 27 by rotating the moving grip 42, the rotating shaft 27 is pushed and the heater portions 30, 30 are moved laterally in the radial direction of the bag making tube 2. To adjust the position.
The lock lever 45 provided on the movable grip 42 locks the shaft portion 43 in order to fix the rotating shaft 27 and the pair of heater portions 30 and 30 at appropriate positions. Similarly, a lock lever 46 for locking the rotation and position of the rotary shaft 27 is provided in the vicinity of the arm portion 25a.

In FIG. 3, one end of a guide rod 48 substantially parallel to the guide rods 17 and 18 is connected to the stay 25 provided in each heater unit 23, and the other ends are holes 19 a and 20 a in the fixing plates 19 and 20. And is slidably supported. Therefore, each heater unit 23 is pushed by manual operation to approach or separate in the X-axis direction with the bag-making tube 2 sandwiched along the holes 19a and 20a of the guide rods 17 and 18 and the fixing plates 19 and 20. be able to.
Thereby, the space | interval of the heater units 23 and 23 can be adjusted. Moreover, as shown in FIG. 6, a lock lever 49 for engaging and disengaging the heater unit 23 with respect to the guide rod 18 is attached to each heater unit 23 on the outside of the stay 25. The lock lever 49 is composed of a member that clamps the guide rod 18, and the heater unit 23 is fixed to the guide rod 18 by being tightened, and can be moved integrally with the heater unit 23 by being loosened.
Further, the stay 25 of each heater unit 23 is provided with an L-shaped holder 50 in parallel with the guide rods 17 and 18, and a scale 51 is provided on the free end side of the L-shaped holder 50 (FIG. 5). reference). The scale portion 51 can be adjusted by measuring, for example, the amount of movement of each heater unit 23 that is manually operated in the X-axis direction, that is, the distance between the bag making tubes 2 of the heater units 23 and 23, with the fixed plates 19 and 20 as references. Yes.

The creasing device 4 of the bag making filling and packaging machine 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
First, the creasing device 4 is adjusted in order to form the longitudinal folds 104 and 105 in the bag F continuously manufactured by the bag making and filling and packaging machine 1. As shown in FIGS. 4 and 7, projection plates 12 for forming fold lines 104 at predetermined intervals are respectively attached to the four long holes 11 of the bag-making tube 2. Each protruding plate 12 is attached to the bag-making tube 2 by inserting both end portions 12b and 12c into the elongated hole 11 in sequence and abutting on the inside, and engaging the engaging portions 12a and 12a on both outer sides of the elongated hole 11. To do. Further, between the protruding plates 12, 12, a protruding disk 36 provided with a protruding portion 36 a for forming a fold 105 is disposed at a position facing the bag-making tube 2.

Next, in FIG. 3 and FIG. 5, the lock levers 49 and 49 of the pair of heater units 23 and 23 sandwiching the bag-making tube 2 are loosened, and the heater units 23 and 23 are moved manually by the guide rods 17 and 23. 18 and guide rods 48 and 48 inserted through the through holes 19a and 20a of the fixing plates 19 and 20, and move in directions toward or away from each other. And the distance (X-axis direction in FIG. 3) of the heater block 14 with respect to each projection part 13 of the bag making tube 2 is adjusted and set.
In this case, the heater surfaces 14a and 14a of the heater blocks 14 and 14 of each heater unit 23 are opposed to each other on the outer side (Y-axis direction) of the protrusions 13 and 13 (see FIG. 3). Then, the heater levers 23 and 23 are positioned and fixed with respect to the guide rods 17 and 18 by tightening the lock levers 49 and 49.

Next, the cylinder 32 is turned ON, and the adjustment grips 33 and 33 of the heater units 23 and 23 are rotated in a state where the heater block 14 is projected, so that the male screw portions 27a and 27b forming the reverse screw of the rotary shaft 27 The nut portions 28a and 28b and the holder portions 29 and 29 to be engaged are moved in a direction approaching each other. Then, the cylinders 32 and 32 and the heater blocks 14 and 14 move integrally therewith, and the heater surfaces 14a and 14a are brought into contact with the protrusions 13 and 13 (see FIG. 7). At this time, one heater block 14 abuts against the protrusion 13, but if the other heater block does not abut against the other protrusion 13, the heater blocks 14, 14 with respect to the pair of protrusions 13, 13. Is misaligned.
In this case, by rotating the moving grip 42 shown in FIGS. 5 and 6, the rotating shaft 27 is moved in the longitudinal direction by the interlocking pushing member 44. Accordingly, the pair of heater blocks 14 and 14 are interlocked, and the mutual spacing of the heater blocks 14 and 14 with respect to the pair of protrusions 13 and 13 is adjusted to be equal to each other.
In this way, the four protrusions 13 projecting radially outward from the bag-making tube 2 and the heater surfaces 14a of the four heater blocks 14 are in exact contact with each other with the tubular film f interposed therebetween as shown in FIG. Can be set as follows.

In this state, the bag making and filling machine 1 is driven. Then, in FIG. 1, the sheet-like continuous film f fed from the film roll is bent by the bag-making guide 3 and passes between the bag-making tube 2 to be formed into a cylindrical film f. . Prior to this, the cylinder 32 of each heater section 30 is turned off, and the heater surface 14a of the heater block 14 is separated from each protrusion 13 of the bag-making tube.
Then, the feeding belt 6 is intermittently operated so that the tubular film f travels on the outer peripheral surface of the bag-making tube 2 and is stopped in a state where it is positioned between each protrusion 13 and the heater surface 14 a of the heater block 14. At this time, as shown in FIG. 7, the protrusion 36 a of the protrusion disk 36 presses into the V groove 37 of the bag-making tube 2 with the tubular film f interposed therebetween. Moreover, the heater block 14 is moved forward by turning on the cylinder 32, and the heater surface 14a holds the tubular film f with the protruding portion 13.
Thereafter, the feeding belt 6 is operated intermittently, whereby the tubular film f is pulled downward, and is sandwiched between the protrusion 13 and the heater surface 14a of the heater block 14, as shown in FIG. Form. At the same time, the fold line 104b is also formed by the corner 14c of the heater block 14. Since these two folds 104a and 14b are at a very small distance D, the folds 104a and 14b look good as a single fold 104 when visually observed.
Moreover, the folds 104a and 104b are fixed by the radiant heat of each heater block 14. At this time, since the protrusion 13 has the flank face θ with respect to the heater surface 14a, the tubular film f in the vicinity of the fold line 104a is not excessively subjected to a frictional load and is smoothly conveyed. In addition, the tubular film f is formed with a fold 105 that protrudes inward by the protruding portions 36 a of the pair of protruding circular plates 36 and the V groove 37 of the bag-making tube 2.

In this way, the tubular film f is intermittently conveyed while forming the fold line 104 at a position corresponding to the four corners and forming the fold line 105 between the two fold lines 104 and 104.
As shown in FIG. 1, in the next step, vertical seals 103 are formed at both end edges of the tubular film f conveyed by the vertical sealer 5. Further, while the feeding of the tubular film f is temporarily stopped, the horizontal sealer 9 performs horizontal sealing and cuts the middle with a cutter. The lower portion of the cut horizontal seal portion becomes the upper surface seal portion 101 of the bag F manufactured previously, and the upper horizontal seal portion becomes the bottom seal portion 102 of the bag F to be bag-made next. The contents are filled through the bag-making tube 2 into the upper opening of the bag F in which the bottom seal portion 102 is formed. Further, a rectangular tube bag F is produced by the next horizontal seal and cutting by a cutter.

As described above, according to the bag making and filling machine 1 according to the present embodiment, the folds 104 and 105 are formed after the formation of the tubular film f, so that the crease position does not shift during the bag making process and is formed accurately. it can. Moreover, since the cylindrical film f is formed into a cylindrical shape using the substantially cylindrical bag-making tube 2, the bag-making tube 2 as an auger for filling the contents into the bag F is larger than the rectangular tube-shaped one. It can be set to speed up the filling operation.
Moreover, since the film is not sandwiched between rollers when forming the fold 104, there is room in the width direction dimension of the tubular film f, and a relatively large-diameter bag-making tube 2 can be used. Speed can be increased. Since the fold line 104 is formed by two fold lines 104a and 104b having a minute interval D, the cylindrical film f is less damaged due to the crease. Even if there is a slight gap error between the protrusion 13 and the corner 14c of the heater surface 14a, it can be absorbed. Even if the tubular film f has high flexibility and is difficult to be creased, one of the two folds 104a and 104b can be formed.
Further, when changing the size of the bag F, it can be dealt with by replacing the protruding plate 12 and adjusting the position of the heater unit 30. Further, by replacing the protruding plate 12 with a closing plate 61 described later and moving the heater portion 30 to the retracted position, a flat bag can be manufactured without replacing the bag-making tube 2.

Next, a modified example of the heater position adjusting mechanism 16 of the creasing apparatus 4 according to the present embodiment will be described with reference to FIGS. 9 and 10. Description is omitted.
FIG. 9 is a horizontal sectional view of an essential part of the bag-making tube 2 according to the first modification. The crease device 54 according to the first modification has a configuration that can change the position of the fold 104 of the bag F. In the figure, a protruding plate 55 is mounted in the long hole 11 of the bag-making tube 2. The projection plate 55 has the same shape as the projection plate 12 according to the first embodiment shown in FIG. 4, and a plurality of projections 56, 57, 58 are formed to protrude in parallel to each other.
Each of the protrusions 56, 57, 58 has a substantially triangular shape in cross section and extends in the longitudinal direction of the protrusion plate 55. With the protruding plate 55 mounted in the elongated hole 11, the protruding portions 56, 57, 58 are arranged at predetermined intervals in the circumferential direction of the bag making tube 2.
Therefore, by adjusting the position of each heater block 14 in the XY axis direction by the heater position adjusting mechanism 16, any one of the protrusions 56, 57, and 58 and the heater surface 14 a of the heater block 14 are interposed via the tubular film f. Can be brought into contact with each other. Thereby, the formation position of the fold 104 of the bag F can be selected as appropriate.
The number of protrusions formed on one protrusion plate 55 is not limited to one or three, and may be two or four or more.

  According to the first modified example described above, the heater plate is provided with the protruding plates 55 having the plurality of protruding portions 56, 57, 58 provided at appropriate plural locations in the circumferential direction of the bag-making tube 2, for example, four locations. By adjusting and selecting the position 14, the position of the fold 104 of the bag F can be changed without replacing the bag-making tube 2, and the bag bottom shape can be changed.

FIG. 10 is a horizontal cross-sectional view of the main part of the bag-making tube 2 according to the second modification of the present embodiment. The crease forming device 60 according to the second modification has a configuration capable of changing the position of the crease 104. In the figure, the bag making tube 2 has a plurality of holes 11 in the circumferential direction that are multiple times the number of folds 104 formed in the bag to be manufactured. Then, the protruding plate 12 or 55 is mounted in the long hole 11 at a position corresponding to the bag bottom shape, and a substantially flat closing plate 61 (closing member) having no protruding portion is mounted in the other long holes. . Then, the position of the heater block 14 is set to a position corresponding to the protruding plate 12 or 55.
Thereby, the bag bottom shape can be changed without changing the bag-making tube 2.

In the above-described embodiment, the protruding plate 12 having the protruding portion 13 is detachably attached to the long hole of the bag-making tube 2, but the present invention is not limited to such a configuration. The protrusion 13 may be directly formed around the bag making tube 2. Even in this case, when the protrusions 13 are formed at four locations around the bag-making tube 2, if the plurality of protrusions 13 are arranged and formed, the protrusions that come into contact with each other by adjusting the position of the heater 14. The part 13 can be selected, and the bag size and the bag bottom shape can be changed.
In the above embodiment, the heater block 14 and the protrusion 13 form the two folds 104a and 104b with a small interval so that the fold 104 can be seen, but the present invention has such a configuration. It is not limited to. Needless to say, one fold 104 may be formed by the heater block 14 and the protrusion 13.

It is a perspective view of the bag making filling packaging machine by an embodiment of the invention. It is a front view of the creasing apparatus of the bag making filling packaging machine shown in FIG. It is a horizontal sectional view of the creasing apparatus shown in FIG. It is a projection board with which a bag making tube is attached, (a) is a top view, (b) is a front view, and (c) is a side view. It is an A direction arrow directional view of FIG. It is a B direction arrow line view of FIG. It is a partial horizontal sectional view which shows the positional relationship of a projection part and a heater block. FIG. 8 is an enlarged view of part C of FIG. It is a principal part horizontal sectional view of the bag making tube which shows the 1st modification of a projection part. It is a principal part horizontal sectional view of the bag making tube which shows the 2nd modification of a projection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag making filling packaging machine 2 Bag making tube 4,54,60 Crease apparatus 11 Long hole (mounting hole)
12, 55 Projection plate (projection member)
13, 56, 57, 58 Protrusion 14 Heater block (heater)
14a Heater surface 14c Corner 16 Heater position adjustment mechanism (position adjustment means)
30, 60 Heater part 61 Closing plate (closing member)
f Cylindrical film (cylindrical packaging material)
f 'film (wrapping material)
F bag

Claims (4)

In the creasing device of the bag-filling and packaging machine, the packaging material is formed into a cylindrical packaging material along the bag-making tube, and a crease is formed on the side surface of the cylindrical packaging material.
A protrusion provided on a side surface of the bag-making tube; and a heater that comes into contact with the protrusion via the cylindrical packaging material, and the heater is slightly separated from the heater surface that contacts the protrusion and the protrusion. A corner portion of the heater surface separated by a distance,
A crease forming apparatus characterized in that two folds are formed by sandwiching a cylindrical packaging material passing between the protrusion and a corner of the heater surface . The said bag tube attachment holes are formed, the protruding portion is formed on the projecting member, the protrusion members according to claim 1, characterized in that a engagement portion for engaging the mounting hole Creasing device. Claim 2 is the projection member with the projection portion is provided with a plurality, characterized in that it comprises position adjustment means for position adjustment to selectively contact the heater in any of the plurality of projections creasing device according to. The said bag tube is the number of integer multiple formation of the mounting hole is the crease, claim 2 or 3 in the mounting hole without mounting the projection member is characterized by being fitted with a closure member provided with no protrusion The creasing apparatus according to claim 1.

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