JP5498766B2 - Bag making and packaging machine - Google Patents

Description

  The present invention relates to a bag making and packaging machine, and more particularly to a bag making and packaging machine for producing a bag having a fastener.

  2. Description of the Related Art In recent years, a bag making and packaging machine that uses a sheet-shaped packaging material to fill a bag to be packaged such as snack confectionery while manufacturing the bag has become widespread. As a bag produced by the bag making and packaging machine, for example, a self-supporting bag disclosed in Patent Document 1 (International Publication WO01 / 24999) is excellent in ease of product display and display effect. That is why demand has increased in recent years.

  Moreover, the fastener is sealed in the vicinity of the part opened by the user among the bags, and the user can seal the bag once opened again.

  In the bag making and packaging machine developed by the applicant of the present application in order to manufacture a bag with a fastener as described above, first, a folding portion that is folded along the conveyance direction of the packaging material is formed, and into the folding portion. A fastener is inserted and the fastener is sealed to the packaging material. Thereafter, the packaging material is formed in a cylindrical shape, and the folded portion overlapping the cylindrical packaging material is raised, and then sealed along the horizontal direction.

  However, when the folded portion is raised, a phenomenon that the cylindrical packaging material is inclined due to the drag occurs, and when the packaging material is sealed in that state, a poor-looking bag is manufactured.

  The subject of this invention is providing the bag making packaging machine which can eliminate the inclination of the cylindrical packaging material which generate | occur | produces when raising a folding part.

The bag making and packaging machine according to the first aspect of the present invention includes a cylinder forming mechanism, a raising mechanism, and a correction mechanism. The cylinder forming mechanism includes a folding part that is folded along the conveying direction, and forms a cylindrical packaging material along the outer periphery of the cylinder, with the packaging material in a state where the folding part overlaps the main body part. The raising mechanism raises the folded portion from the main body portion of the cylindrical packaging material. The correction mechanism corrects the posture of the cylindrical packaging material tilted by the rising operation of the folding portion by urging the cylindrical packaging material from the inside toward the outside .

  In this bag making and packaging machine, by correcting the posture of the cylindrical packaging material, a situation in which the cylindrical packaging material is conveyed to the next process while being tilted is avoided, thereby preventing bag making defects.

The bag making and packaging machine according to the second invention includes predetermined processing means, a cylinder forming mechanism, a raising mechanism, and a correction mechanism. The predetermined processing means processes the packaging material into a predetermined state including at least folding along the conveyance direction, thereby forming a folded portion having higher rigidity than a portion not processed into the predetermined state. The cylinder forming mechanism forms a cylindrical packaging material by placing the packaging material in a state in which the folded portion overlaps the main body portion along the outer periphery of the cylindrical body. The raising mechanism raises the folded portion from the main body portion of the cylindrical packaging material. The correction mechanism corrects the posture of the cylindrical packaging material tilted by the rising operation of the folding portion by urging the cylindrical packaging material from the inside toward the outside .

  In this bag making and packaging machine, as in the first aspect of the invention, the posture of the cylindrical packaging material is corrected, so that the situation where the cylindrical packaging material is conveyed to the next process while being tilted is avoided. Is prevented.

  A bag making and packaging machine according to a third invention is the bag making and packaging machine according to the first invention or the second invention, wherein the correction mechanism includes a correction member and an operation member. The correction member is disposed on the inner side of the path through which the inner surface of the cylindrical packaging material passes, and faces a predetermined region on the inner surface. The operation member is disposed outside the path, and operates the correction member to apply an outward force to a predetermined area.

  In this bag making and packaging machine, the correction member comes to face a predetermined area from the inside of the cylindrical packaging material, and does not apply force to the cylindrical packaging material except during operation, so that the conveyance of the cylindrical packaging material is hindered. The space is effectively used.

  A bag making and packaging machine according to a fourth aspect of the present invention is the bag making and packaging machine according to the third aspect of the present invention, wherein the correction member is rotatably supported by the cylindrical body by a support shaft orthogonal to the conveying direction of the cylindrical packaging material. ing. The operation member rotates the correction member in a direction in which the correction member is brought into contact with a predetermined region of the cylindrical packaging material.

  In this bag making and packaging machine, since the correction member directly contacts the predetermined region of the cylindrical packaging material to correct the posture, the position regulation of the cylindrical packaging material is easy, and the accuracy of the posture correction is increased.

  A bag making and packaging machine according to a fifth aspect of the present invention is the bag making and packaging machine according to the fourth aspect of the present invention, further comprising a folding mechanism. The folding mechanism is disposed on the opposite side of the correction member across the cylindrical packaging material, and forms a folding surface by pressing a predetermined region. Further, the folding mechanism pushes the predetermined area from the outside to the inside of the cylindrical packaging material when the correction member rotates toward the predetermined area.

  In this bag making and packaging machine, when folding a specific surface of the bag, a member that supports from the inside of the cylindrical packaging material and a member that forms from the outside are required. Therefore, as a member that supports the correction member from the inside of the cylindrical packaging material By using both, the mechanism is simplified and the number of processing steps is reduced.

  A bag making and packaging machine according to a sixth aspect of the present invention is the bag making and packaging machine according to the fifth aspect of the present invention, wherein the correction member has an action part and an operated part. The action portion is supported by a support shaft in the vicinity of the end of the cylindrical body, and extends from the support shaft by a predetermined length in the conveyance direction of the cylindrical packaging material. The operated part is connected to the action part, has a length shorter than that of the action part, and extends from the support shaft in a direction opposite to the conveying direction of the cylindrical packaging material. The operation member rotates the action portion toward a predetermined region of the cylindrical packaging material by pushing the operated portion of the correction member from the outside to the inside of the cylindrical packaging material.

  In this bag making and packaging machine, the amount of rotation of the action portion is determined by the amount of pressing of the operation member, and thus adjustment is easy, and even when it is desired to change the degree of correction, it can be easily adjusted.

  A bag making and packaging machine according to a seventh aspect of the present invention is the bag making and packaging machine according to the sixth aspect of the present invention, wherein the action part of the correction member separates the opposing surfaces of the cylindrical packaging material in opposite directions. And a second working part. The space between the first action part and the second action part is opposed to the predetermined area. The folding mechanism inserts a predetermined area into the space and folds it.

  In this bag making and packaging machine, the predetermined area is recessed and the outside of the predetermined area is folded inward with the center as the center. By making the shape surface the bottom surface of the bag, an upright bag is realized.

  A bag making and packaging machine according to an eighth invention is the bag making and packaging machine according to any one of the first to seventh inventions, wherein the folding part is located on the opposite side of the predetermined region with the correction member interposed therebetween. . In this bag making and packaging machine, the predetermined area is located at the opposite position of the folding part and is the most inclined area by the rising operation, so that the effect of the correcting operation by the correcting member is maximized.

  A bag making and packaging machine according to a ninth aspect of the present invention is the bag making and packaging machine according to the first or second aspect of the present invention, further comprising a folding mechanism. The folding mechanism pushes a predetermined area located on the opposite side of the folding portion of the cylindrical packaging material from the outside to the inside to form a folding surface in the cylindrical packaging material, so that at least air is supplied to the predetermined area. It has a nozzle for spraying.

  In this bag making and packaging machine, the pushing force of the air blown from the nozzles acts to the necessary folding depth on the folding surface without disturbing the conveyance of the cylindrical packaging material, so that when the folding surface is formed in a predetermined area Occurrence of wrinkles is suppressed.

  Further, since the air hitting the predetermined area travels along the folding marks left when the previous folding surface is formed, the predetermined area is extended along the conveying direction of the cylindrical packaging material, and the folding portion is raised by the raising mechanism. The posture of a predetermined region that is sometimes distorted is corrected.

  A bag making and packaging machine according to a tenth aspect of the present invention is the bag making and packaging machine according to the ninth aspect of the present invention, wherein a pipe that guides air to a predetermined area is connected to the nozzle. The pipe is in contact with a predetermined region and extends along the conveying direction of the cylindrical packaging material.

  In this bag making and packaging machine, the pipe contacts the predetermined area of the cylindrical packaging material and tries to maintain the shape of the already formed folding surface, so that meandering of the cylindrical packaging material is prevented and generation of wrinkles is suppressed. Is done. In addition, since the air coming out of the pipe travels along the folding traces remaining at the time of forming the previous folding surface, the predetermined area is extended along the conveying direction of the cylindrical packaging material, and the folding unit is raised by the raising mechanism The posture of the distorted predetermined area is corrected.

  A bag making and packaging machine according to an eleventh aspect of the present invention is the bag making and packaging machine according to the tenth aspect of the present invention, wherein the folding mechanism further includes a folding member that repeats contact and dissociation with a predetermined region. The folding surface is formed by the air blown from the pipe and the folding member pushing a predetermined area.

  In this bag making and packaging machine, the shape of the folded surface of the predetermined area folded by the air blown from the pipe and the folding member is not reduced by the pipe and the air coming out of the pipe even when the folding member is not pushed away from the predetermined area. Retained. As a result, meandering of the cylindrical packaging material is prevented and generation of wrinkles is suppressed.

  A bag making and packaging machine according to a twelfth invention is the bag making and packaging machine according to the first invention or the second invention, wherein the cylinder forming mechanism has a cover member that covers the cylindrical packaging material from the outside. The cover member is provided with a notch that faces the folded portion that rises by the raising mechanism.

  While the cylindrical packaging material is covered with the cover member from the outside, the cylindrical shape is reliably maintained, but the rising of the folded portion tends to be delayed. However, in this bag making and packaging machine, since the cutout portion is provided, the section in which the cover member covers the folding portion ends quickly, and accordingly the rising of the folding portion is accelerated. As a result, the folding part is sufficiently raised and the generation of wrinkles is suppressed. Further, since the rising section of the folding portion becomes long, the rising of the folding portion proceeds naturally and smoothly, and the posture of the cylindrical packaging material is not easily collapsed.

  A bag making and packaging machine according to a thirteenth aspect of the present invention is the bag making and packaging machine according to the twelfth aspect of the present invention, wherein the cylinder forming mechanism further includes a fixing base for fixing the cover member. The fixing base is provided with a hole that widens the gap between the notch and the fixing base.

  Even if the section where the cover member covers the folding part by providing the notch part ends early, if the fixing base for fixing the cover member covers the notch part, the fixing base and the folding part interfere with each other and the folding part The rise of the is slow. However, in this bag making and packaging machine, by providing a hole that widens the gap between the cutout portion and the fixing base, the folding portion and the fixing base do not interfere even if the folding portion rises from the cutout portion.

  A bag making and packaging machine according to a fourteenth aspect of the present invention is the bag making and packaging machine according to the twelfth aspect of the present invention, wherein the raising mechanism has a main body part and a folding part of the cylindrical packaging material conveyed to the downstream side of the notch part. There is an interrupting plate that interrupts between and raises the folding part.

  Even if the interrupting plate raises the folding part on the downstream side of the notch part, the starting point where the folding part floats away from the main body part is upstream from the position where the folding part and the interrupting plate contact. In this bag making and packaging machine, since the cutout portion is provided, there is no interfering member even if the folding portion is lifted away from the main body portion, so that the rising of the folding portion is not hindered and the rising of the folding portion is accelerated. .

  A bag making and packaging machine according to a fifteenth aspect of the present invention is the bag making and packaging machine according to the first or second aspect of the invention, further comprising a roller for supporting a packaging material conveyed from the upstream side of the cylinder forming mechanism to the cylinder forming mechanism. I have. The roller is provided with a groove for fitting a folded portion of the packaging material before being formed into the cylindrical packaging material.

  The folded part of the packaging material is thicker than the other parts, and when it sticks to the roller, the packaging material is pulled in a mountain shape and stretched or wrinkled around the part where the thickness changes due to the tension. However, in this bag making and packaging machine, since the folded portion fits into the groove of the roller, the packaging material does not become a mountain shape, so the tension acting on the periphery of the portion where the thickness changes is relaxed, and elongation or wrinkles are generated. Is suppressed.

  In the bag making and packaging machine according to the present invention, by correcting the posture of the cylindrical packaging material, a situation in which the cylindrical packaging material is conveyed to the next process while being tilted is avoided, so that bag production defects are prevented. The

The perspective view of the bag which the bag making packaging machine concerning one embodiment of the present invention manufactures. The side view of the bag shown in FIG. The perspective view of a bag making packaging machine. The schematic side view which shows the conveyance path | route of a film. The schematic side view of a pleat formation unit. Perspective view of pleat forming unit The schematic perspective view which shows a conveyance path | route prescription | regulation part. The schematic perspective view which shows the film which passes a conveyance path | route definition part. The expansion perspective view which looked at the pleat formation part from the side which the pleat equivalent part approachs. The schematic side view which shows the state of the fastener and pleat equivalent part which go to the downstream from the upstream of a pleat forming mechanism. FIG. 3 is an overall perspective view of the pleat forming mechanism with the fastener insertion member removed. Sectional drawing when the pleat formation unit of FIG. 5 is divided | segmented by the JJ line. The partial expanded side view of a film guidance part. (A) Sectional drawing of the pleat part when the pleat formation unit of FIG. 5 is divided | segmented by the KK line | wire. (B) Sectional drawing of the pleat part when the pleat formation unit of FIG. 5 is divided | segmented by the LL line. (C) Sectional drawing of the pleat part when the pleat formation unit of FIG. 5 is divided | segmented by MM. (D) Sectional drawing of the pleat part when the pleat formation unit of FIG. 5 is divided | segmented by the NN line. The side view of a bag making packaging unit. The perspective view of the film shape | molded by the cylinder shape, passing the vertical sealing mechanism, and being pinched | interposed into a horizontal sealing mechanism. The perspective view of a posture correction mechanism. The perspective view of the correction mechanism when a piston head pushes a protrusion. The perspective view which shows the state by which a cylindrical film is correct | amended by a correction mechanism. The fragmentary sectional view of the film conveyance roller which supports the film F which passes a pleat formation mechanism and is conveyed to a former. The perspective view of the film which is shape | molded by the bag making packaging machine which concerns on a modification, passes a vertical seal mechanism, and is pinched | interposed into a horizontal seal mechanism. The perspective view of the fixing stand which fixes a former. The control block diagram of a bag making packaging machine.

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

<Bag 10>
FIG. 1 is a perspective view of a bag manufactured by a bag making and packaging machine according to an embodiment of the present invention, and FIG. 2 is a side view of the bag of FIG. 1 and 2, the bag 10 includes a large fold portion FF formed at the top of the bag, a bottom portion FT including a bottom surface 101 and a hem portion FH that surrounds the bottom surface 101, and an intermediate portion that is the other portion of the bag 10. Part FM. The bag 10 can be self-supporting with the bottom portion FT as a support portion. The pleat portion FF includes a top seal part H1, a cutout part H2, and a fastener attachment part H3. The top seal portion H1 is heat sealed. A perforation is formed at the cut-out site H2. By breaking the perforation, the top seal portion H1 can be separated from the other portions of the fold portion FF. A fastener ZP is attached to the fastener attachment portion H3. Thereby, even if the bag 10 is once opened, the bag 10 can be sealed again.

  The bag making and packaging machine 1 bends the sheet-like film F at a predetermined position to form a fold portion FF and a hem portion FH. Further, the bag making and packaging machine 1 forms the film F into a cylindrical shape, and a first seal portion 102 that is an overlapping portion of the cylindrical film F and a second position that is a sandwiching and closing position of the cylindrical film F. The bag 10 is manufactured by thermally welding the seal portion 103. Therefore, the first seal part 102 and the second seal part 103 are orthogonal to each other.

  In the bag making and packaging machine 1 of the present embodiment, the posture immediately before the bag 10 is completed is a posture in which the first seal portion 102 is vertical and the second seal portion 103 is horizontal. The heat welding process is called a vertical sealing process, and the process of thermally welding the second seal portion 103 is called a horizontal sealing process.

<Overall configuration of bag making and packaging machine 1>
FIG. 3 is a perspective view of the bag making and packaging machine. In FIG. 3, the bag making and packaging machine 1 is a machine for bagging commodities such as snacks, and includes a film supply unit 2, a fold forming unit 3, and a bag making and packaging unit 5. The film supply unit 2 supplies the film F to be the bag 10 to the bag making and packaging unit 5. The pleat forming unit 3 is installed in a path from the film supply unit 2 to the bag making and packaging unit 5 through which the film F is conveyed.

  The bag making and packaging unit 5 performs product bagging. Moreover, the control panel 6 is arrange | positioned at the bag making packaging unit 5 at the right side toward the front. The control panel 6 has a plurality of operation switches outside, and these operation switches are electrically connected to a controller (not shown) disposed inside the bag making and packaging unit 5. Further, a liquid crystal display 7 indicating an operation state is arranged at a position where a user who operates the control panel 6 can visually recognize.

  The front of the bag making and packaging machine 1 indicates the side on which the liquid crystal display 7 of the bag making and packaging machine 1 shown in FIG. 3 is attached. Further, regarding the bag making and packaging machine 1, “left” and “right” are based on the case where the bag making and packaging machine 1 is viewed from the front side. Further, regarding the bag making and packaging machine 1, “upstream” and “downstream” mean upstream or downstream in the conveyance direction of the film F.

(1) Film supply unit 2
The film supply unit 2 supplies the sheet-like film F to the forming mechanism 50 (see FIG. 4) of the bag making and packaging unit 5. The film supply unit 2 has a film roller 20. A film roll 2 a around which the film F is wound is set on the film roller 20. The film roller 20 is rotated by a motor (not shown). As a result, the film F is unwound from the film roll 2a.

  FIG. 4 is a schematic side view showing a film transport path. In FIG. 4, a plurality of film transport rollers 15 a are provided in the film F transport path. The film F fed from the film roll 2a is stretched over the film transport roller 15a, and the transport angle of the film F is changed every time it passes through the film transport roller 15a.

  The film F is actually transported by a pair of pull-down belts 14 (see FIG. 3) incorporated in the bag making and packaging unit 5, and the pull-down belt 14 moves the film transport rollers 15a (see FIG. 4). Therefore, the film F is conveyed to the bag making and packaging unit 5 (see FIG. 3) in a state where a predetermined tension is applied.

  The pull-down belt 14 is disposed symmetrically in the bag making and packaging unit 5 with a tube 501 (see FIG. 4) extending in the vertical direction as an axis. The pull-down belt 14 contacts the cylindrical film F wound around the tube 501 and conveys the film F downward while adsorbing the film F.

(2) Fold formation unit 3
FIG. 5 is a schematic side view of the pleat forming unit, and FIG. 6 is a perspective view of the pleat forming unit. 5 and 6, the pleat forming unit 3 includes a conveyance path defining portion 31, a crease forming mechanism 32, a hem forming mechanism 33, and a film guiding portion 34. The “pleat portion FF” shown in FIG. 1 is formed by the pleat formation mechanism 32, and the “hem portion FH” shown in FIG. 1 is formed by the hem formation mechanism 33.

(Conveying path defining part 31)
FIG. 7 is a schematic perspective view showing the transport path defining portion. In FIG. 7, the conveyance path defining portion 31 includes a pentagonal rectangular parallelepiped block B <b> 1, a triangular rectangular parallelepiped block B <b> 2, and a block B <b> 3. Each of the block B1, the block B2, and the block B3 has a side surface having a predetermined height h. That is, the block B1 has a pentagonal bottom surface and top surface and side surfaces with a height h extending perpendicularly from the bottom surface to the top surface, and the block B2 and block B3 are triangular bottom and top surfaces and from the bottom surface to the top surface. And a side surface having a height h extending vertically. Each of the block B1, the block B2, and the block B3 is installed with an inclination of 45 degrees with respect to the horizontal plane.

  The block B1 is disposed on the upstream side of the conveyance path defining unit 31. Block B2 and block B3 are arranged downstream of block B1. Further, the side S22 of the block B2 and the side S32 of the block B3 are installed so as to have the same height as the upstream guide member 341 (see FIG. 5). The block B1, the block B2, and the block B3 are arranged with a narrow gap in the film F conveyance direction. The gap is set to such an extent that the film F can pass through.

  The block B1, the block B2, and the block B3 are arranged so as to be shifted along the height h direction. In the present embodiment, the bottom surfaces of the block B2 and the block B3 are arranged so as to be located on the upper side in the height h direction from the surface obtained by virtually extending the upper surface of the block B1 (see FIG. 5).

  In addition, as shown in FIGS. 5 and 6, the transport path defining portion 31 is provided with a channel member C <b> 1. The channel member C1 extends in the width direction of the transport path defining portion 31, and is arranged to face the side S22 of the block B2 and the side S32 of the block B3. The film F is in contact with the channel member C1, the side S22 of the block B2, and the side S32 of the block B3, and the conveyance angle is changed by the side S22 of the block B2 and the side S32 of the block B3.

  FIG. 8 is a schematic perspective view showing a film passing through the conveyance path defining portion. In FIG. 8, the film F is temporarily bent by passing through the gap between the block B1 and the block B2, the gap between the block B1 and the block B3, and the gap between the block B2 and the block B3 in the conveyance path defining unit 31. The fold-corresponding portion and other portions (non-pleat portions) are formed while changing the conveyance angle.

  First, the film F is conveyed along the bottom surface of the block B1. Film F is bent by side S11 and side S12 of block B1, and a conveyance angle is changed. Thereafter, the film F advances along the side surface S111 and the side surface S121 of the block B1, and the clearance between the side surface S111 of the block B1 and the side surface S211 of the block B2 and the clearance between the side surface S121 of the block B1 and the side surface S311 of the block B3. It passes along the side surface S211 of the block B2 and the side surface S311 of the block B3.

  The portion of the film F in the vicinity of the apex where the sides S11 and S12 of the block B1 intersect is the gap between the side S23 of the block B2 and the side S33 of the block B3, and the rod 38 (from the bottom bottom of each of the blocks B2 and B3). (See FIG. 7) Passing through the gap between each other, a fold-corresponding portion is formed.

  Portions other than the fold-corresponding portions of the film F that travel along the side surface S211 of the block B2 and the side surface S311 of the block B3 are bent by the side S21 of the block B2 and the side S31 of the block B3, and the conveyance angle is changed. Thereafter, the part other than the corrugation corresponding to the film F proceeds along the upper surface S212 of the block B2 and the upper surface S312 of the block B3. Further, the conveyance angle of the portion other than the fold-corresponding portion of the film F is changed by contacting the channel member C1 on the side S22 of the block B2 and the side S32 of the block B3.

(Fold formation mechanism 32)
In FIG. 6, the pleat forming mechanism 32 includes a heater 321 and a fastener insertion member 322. Both the heater 321 and the fastener insertion member 322 are elongated members extending from upstream to downstream.

  FIG. 9 is an enlarged perspective view of the state in which the corrugation equivalent portion of the film enters the corrugation forming mechanism as viewed from the side in which the corrugation equivalent portion enters. As shown in FIG. 9, the film F (corrugated portion) overlapped by the rod 38 advances with the outer surface facing the heater 321. Since the fastener insertion member 322 is located inside the corrugation equivalent part, it is not visible in FIG.

  FIG. 10 is a schematic side view showing the state of the fastener and the pleat corresponding portion from the upstream to the downstream of the pleat forming mechanism. In FIG. 10, the fastener ZP is punched by the punching machine 4 before joining the pleat corresponding portion. The punching machine 4 opens the long hole ZPH with the fastener ZP sandwiched between the punch die 4a and the receiving die 4b. The long holes ZPH are opened at a constant pitch, and the pitch is equal to the width direction dimension of the bag 10.

  The fastener ZP has a meshing portion ZPK in which concave teeth and convex teeth extending in the longitudinal direction are fitted, and the portion perforated by the punching machine 4 has no meshing portion ZPK. That is, the part with the long hole ZPH does not have concave teeth and convex teeth. The punched fastener ZP is inserted into the fold corresponding portion via the fastener insertion member 322.

  FIG. 11 is an overall perspective view of the pleat forming mechanism with the fastener insertion member removed. 10 and 11, the heater 321 has a pair of first heaters 321a and a pair of second heaters 321b. The first heater 321a is heated and heat-sealed across the tip region of the fold-corresponding portion to form a portion that becomes the top seal portion H1 of the fold portion FF shown in FIG.

  The second heater 321b is heated and heat-sealed across the region from the center to the root of the fold-corresponding portion including the fastener ZP to form a portion to be a fastener attachment portion H3 shown in FIG. The second heater 321b has a groove 321c on the surface facing the engagement portion ZPK of the fastener ZP, and the engagement portion ZPK fits into the groove 321c when the fastener ZP is sandwiched. Therefore, the meshing portion ZPK is not crushed by the second heater 321b.

  The first heater 321a and the second heater 321b are connected to the piston 323a of the adjacent first cylinder block 323, and the direction in which the corrugated portion of the film F is sandwiched by the pressure of the air supplied to the first cylinder block 323 Reciprocate along. The fold-corresponding portion is sandwiched between the heaters 321 to become a fold portion FF, and goes to the thickness detection mechanism 324.

  The thickness detection mechanism 324 is located on the downstream side of the heater 321 and measures the thickness dimension of the region including the long hole ZPH in the fold portion FF. The region including the long hole ZPH and orthogonal to the transport direction of the film F is a region where the film F is scheduled to be laterally sealed by the seal jaw 171 in the bag making and packaging unit 5 (hereinafter referred to as a seal-scheduled portion). . If the drilling of the fastener ZP by the punching machine 4 is incomplete, or if the position of the punching is shifted, the thickness of the planned seal portion increases, and even if the horizontal sealing process is performed, a seal failure occurs. Probability is high. Therefore, before the pleat portion FF is conveyed to the bag making and packaging unit 5, the thickness detection mechanism 324 measures the thickness dimension of the planned sealing portion and sends the measured value t to the controller inside the bag making and packaging unit 5. Since the controller includes a determination unit that determines whether or not the measurement value t is within the allowable range, the determination unit determines whether or not the measurement value t is equal to or less than a predetermined value. When the measured value t is not less than or equal to the predetermined value, the operation of the bag making and packaging machine 1 is forcibly stopped, and the user is notified of the abnormality.

  At that time, in order to prevent the entry of defective seals, the controller does not perform the horizontal sealing process and discharges in a bag formed longer than the normal product, or causes the horizontal sealing process to be performed but cuts. You may perform control that it discharges | emits in the continuous packaging state which connected the bag, without carrying out.

  The thickness detection mechanism 324 has a pair of block-shaped measurement units 325. The measurement unit 325 sandwiches the planned seal portion with the measurement surface 325a, and measures the thickness dimension from the gap between the measurement surfaces 325a at that time. Moreover, the measurement part 325 has the bar heater 326 inside, and the measurement surface 325a is maintained at high temperature. The measurement unit 325 is connected to the piston 327a of the adjacent second cylinder block 327, and reciprocates along the direction in which the seal planned portion is sandwiched by the pressure of air supplied to the second cylinder block 327.

  Therefore, since the planned sealing portion is sandwiched at a predetermined pressure by the high-temperature measurement surface 325a, the thickness dimension is measured after unnecessary protrusions are crushed and smoothed. The portion to be sealed is reduced in thickness because the meshing portion ZPK of the zipper ZP is perforated by the punching machine 4, but is further compressed because it is heated and compressed by the high-temperature measurement surface 325a. That is, the measurement unit 325 measures the thickness dimension of the planned seal portion after reducing the thickness of the planned seal portion as much as possible.

(Hem part forming part)
FIG. 12 is a cross-sectional view of the fold forming unit of FIG. 5 when divided along the line JJ. In FIG. 12, the hem forming mechanism 33 includes two folding rollers 331 and two heaters 332. The folding roller 331 partially folds the film F. The heater 332 applies heat from both sides to the portion bent by the folding roller 331. The heated portion is sandwiched and adhered to a roller (not shown). At that time, a hem portion FH is formed on the film F.

(Film guide part)
FIG. 13 is a partially enlarged view of the film guiding portion. 14A is a cross-sectional view of the pleat portion when the pleat forming unit of FIG. 5 is divided by the KK line, and FIG. 14B is a view when the pleat forming unit of FIG. 5 is divided by the LL line. Sectional view of pleat part, (c) is a sectional view of the pleat part when the pleat forming unit of FIG. 5 is divided by MM, (d) is a part of pleat forming unit of FIG. It is sectional drawing of a pleat part.

  In FIG. 13, the film guiding section 34 guides the film F to the bag making and packaging unit 5. The film guiding portion 34 includes an upstream guiding member 341, a downstream guiding member 342, and a tilt member 343 (see FIG. 14). The upstream guide member 341 is a plurality of flat plates extending from the upstream to the downstream along the conveyance direction of the film F, and is spaced horizontally from the installation surface of the bag making and packaging machine 1 and at a predetermined interval in the width direction of the film F. It is arranged with a gap. The upstream guide member 341 is in contact with the main body portion FB which is a portion of the film F excluding the fold portion FF and the hem portion FH.

  The downstream guide member 342 is disposed downstream of the upstream guide member 341 at a predetermined interval in the width direction of the film F. As shown in FIG. 13, the downstream guide member 342 is inclined by a predetermined angle with respect to the upstream guide member 341. The predetermined angle is determined according to the support position of the film transport roller 15a. The film transport roller 15a is supported so as to be movable in the height D1 direction of the fold portion FF. The support position of the film transport roller 15a is such that the position FR where the film F contacts the film transport roller 15a is between the virtual surface FBH and the virtual position FFH, and the distance dimension D3 from the position FR to the virtual position FFH is The distance D2 from the position FR to the virtual surface FBH is adjusted to a position that becomes long.

  The virtual surface FBH is a surface obtained by virtually extending the transport surface of the main body portion FB of the film F guided by the upstream guide member 341 in the transport direction. The virtual position FFH is a position where the upper end of the fold portion FF of the film F is virtually extended in the transport direction. The film transport roller 15a is supported at a position (D2> D1 / 2) where the distance dimension D2 from the position FR to the virtual surface FBH is slightly larger than half of the height dimension D1 of the fold portion FF.

  Below the downstream guide member 342, an inclined member 343 shown in FIGS. 14A to 14D is arranged. The tilt member 343 contacts the fold portion FF formed by the fold forming mechanism 32 and tilts it to the same degree as the main body portion FB of the film F.

(3) Bag-making packaging unit FIG. 15 is a side view of the bag-making packaging unit. In FIG. 15, the bag making and packaging unit 5 includes a forming mechanism 50, a vertical sealing mechanism 16, and a horizontal sealing mechanism 17.

(Molding mechanism 50)
The forming mechanism 50 forms the film F sent from the film supply unit 2 into a cylindrical shape. The forming mechanism 50 includes a tube 501 and a former 502. The tube 501 is a cylindrical member extending in the vertical direction, and has openings at the upper and lower ends. A product falling by a predetermined amount from a computer scale 9 provided above the bag making and packaging unit 5 is put into the opening at the upper end of the tube 501. The computer scale 9 is a combination weighing device including a pool hopper, a lightweight hopper, a collective discharge chute, and the like.

  The former 502 is arranged so as to surround the tube 501. The former 502 is formed in a cylindrical shape when the film F sent from the film supply unit 2 passes through the gap between the former 502 and the tube 501.

(Vertical seal mechanism 16)
The vertical sealing mechanism 16 heat seals the cylindrical film F along the vertical direction. The vertical seal mechanism 16 includes a heater belt heated by a heater, and the first seal portion 102 (see FIGS. 1 and 2), which is a portion extending from the upstream to the downstream of the cylindrical film F and overlapping, is fixed. It heats and seals against the surface of the tube 501 with the applied pressure. Further, the vertical seal mechanism 16 perforates the cut portion H2 (see FIGS. 1 and 2) of the fold portion FF with a cutter (not shown).

(Horizontal seal mechanism 17)
As shown in FIG. 15, the horizontal seal mechanism 17 is located downstream of the vertical seal mechanism 16 and has a pair of seal jaws 171. The seal jaws 171 can reciprocate so as to approach or separate from each other while being synchronized with each other, and can sandwich the tubular film F in a state of being closest to each other.

  FIG. 16 is a perspective view of a film F that is formed into a cylindrical shape, passes through the vertical sealing mechanism, and is sandwiched between the horizontal sealing mechanisms. In FIG. 16, the pleated portion FF is raised by the edge of the raising plate 501b on the way of the cylindrical film F toward the sealing jaw 171 of the horizontal sealing mechanism 17. Originally, the pleat portion FF is overlaid on the other surface when the film F is formed into a cylindrical shape, and therefore needs to be raised before heat sealing.

  The cylindrical film F advances by a predetermined pitch in synchronization with the reciprocating motion of the seal jaw 171 in a state where the pleat portion FF is raised. The predetermined pitch is equal to the pitch of the long hole ZPH of the fastener ZP, and the seal jaw 171 sandwiches the second seal portion 103 including the long hole ZPH. The seal jaw 171 has a heater inside, and thermally seals the sandwiched second seal portion 103. This is the horizontal sealing process.

  If the long hole ZPH is incomplete and the meshing portion ZPK remains, the seal jaw 171 sandwiches the meshing portion ZPK, so that a minute gap is generated between the seal jaws 171 and the second seal portion 103 of the film F is formed. There is a high probability that it will not be completely heat sealed. However, in the second seal portion 103, the planned seal portion including the long hole ZPH is measured in thickness by the measurement unit 325 of the thickness detection mechanism 324 in the previous stage of the horizontal sealing process, and the long hole ZPH is reliably formed. In this stage, the long hole ZPH is in a complete state, and the horizontal sealing process is reliably performed.

  The seal jaw 171 is a second seal part on one side of the bag 10 (first bag) that is manufactured first, out of the two bags 10 that are continuously manufactured by the bag making and packaging machine 1 by one sandwiching operation. 103 and the second seal portion 103 on one side of the bag 10 (second bag) to be manufactured next are formed at the same time. One of the pair of seal jaws 171 has a built-in cutter (not shown), and the center of the second seal portion 103 that is heat-sealed by a single clamping operation is cut in the lateral direction by the cutter. By this cutting, the bags 10 are cut one by one.

(Attitude correction mechanism 530)
By the way, when the raising plate 501b raises the pleated portion FF from the cylindrical film F on the way from the vertical sealing mechanism 16 to the horizontal sealing mechanism 17, the cylindrical film F is inclined in the rising direction of the fold portion FF. A problem occurs. Because the fold portion FF has the zipper ZP sealed inside the film F folded, the rigidity is higher than the other regions, and due to the drag when the fold portion FF is raised, other than the fold portion FF This is because the film F is pulled toward the fold portion FF.

  When the horizontal sealing mechanism 17 performs the horizontal sealing process while the attitude of the cylindrical film F is tilted, the bag 10 having a poor appearance is manufactured. Therefore, before the cylindrical film F is subjected to the horizontal sealing process, the attitude is changed. Need to be corrected. Therefore, in this embodiment, after the raising plate 501b raises the pleated portion FF from the tubular film F, the posture of the tubular film F is corrected.

  FIG. 17 is a perspective view of the posture correction mechanism. In FIG. 17, a support plate 501 c and a part of the correction mechanism 530 are attached to the lower end of the tube 501. The pleat portion FF raised by the raising plate 501b shown in FIG. 16 is supported from the inside by a support plate 501c shown in FIG. 17 so as not to tilt again. The correction mechanism 530 includes a correction member 531 attached to the tube 501 and an operation member 532 arranged to face the correction member 531.

  The correction member 531 has a first action part 531a, a second action part 531b, a support shaft 531c, and an operated part 531d, and is supported rotatably on the lower end of the tube 501 by the support shaft 531c. The first action part 531a and the second action part 531b face each other with a predetermined distance, and extend downward from the vicinity of the support shaft 531c by a predetermined length.

  The operated portion 531d is a portion extending upward from the support shaft 531c, and is completely located inside the tube 501, and its length is shorter than that of the first action portion 531a and the second action portion 531b. A protrusion 531e is provided at a substantially central portion of the operated portion 531d. The tube 501 is provided with a through hole 501e at a position facing the protrusion 531e, and the protrusion 531e projects from the inside of the tube 501 to the outside through the through hole 501e.

  The operation member 532 has a piston head 532a and a cylinder block 532b. The piston head 532a faces the tip of the protrusion 531e, and is held by the cylinder block 532b via the piston 532c (see FIG. 18). The piston head 532a reciprocates by the air supplied to the cylinder block 532b, and pushes the projection 531e into the tube 501 when it jumps out.

  FIG. 18 is a perspective view of the correction mechanism when the piston head pushes the protrusion. In FIG. 18, when the piston head 532a pushes the protrusion 531e, the operated portion 531d rotates about the support shaft 531c, so that the first action portion 531a and the second action portion 531b rotate in conjunction with each other. The first action part 531a and the second action part 531b are located on the inner side of the virtual extension surface of the outer peripheral surface of the tube 501, but when turned, the tip part is outside the virtual extension surface of the outer peripheral surface of the tube 501. Jump out to the.

  FIG. 19 is a perspective view illustrating a state in which the posture of the tubular film F is corrected by the correction mechanism. In FIG. 19, the piston head 532 a pushes the protrusion 531 e from the outer surface of the film F. The first action part 531a and the second action part 531b are located inside the path through which the inner surface of the cylindrical film F passes. Push outward from. As a result, the tubular film F swings in the direction indicated by the arrow X in FIG. 19 and the tilted posture becomes almost straight.

(Folding mechanism 540)
The cylindrical film F is formed with a folded portion G (see FIG. 19) simultaneously with the posture correction. The folding part G is folded so that the center enters the inside of the edges on both sides. For example, the bottom surface 101 in FIG. 1 is the folding portion G, and the bottom surface 101 is recessed to the inside of the bag 10 from the surrounding hem portion FH. When the bag 10 is stood on the display shelf, the bag 10 stands at the edge of the hem portion FH instead of the bottom surface 101, so that the standing posture of the bag 10 is stabilized.

  In the present embodiment, the folding mechanism 540 is disposed below the cylinder block 532 b of the correction mechanism 530 in order to form the folding portion G. The folding mechanism 540 includes a folding plate 541 and a cylinder block 542. The folding plate 541 is supported by the cylinder block 542 via the piston 541a, and reciprocates by the pressure of air supplied to the cylinder block 542.

  As shown in FIG. 18, the folding plate 541 is opposed to the space between the first action part 531a and the second action part 531b, and when the first action part 531a and the second action part 531b rotate. At the same time, it jumps out toward the space sandwiched between the first action part 531a and the second action part 531b. As a result, as shown in FIG. 19, when the tubular film F swings in the direction of the arrow X, the folding plate 541 pops out, and the first action portion 531 a and the second action portion of the tubular film F are ejected. The surface facing the space sandwiched between 531b is folded inward by the folding plate 541. In this way, the folded portion G is formed.

(Supplementary information)
The fold portion FF of the film F is thicker than the other portions, and when the film F is wound around the film transport roller 15a, the film F sticks to the surface of the film transport roller 15a in a mountain shape with the fold portion FF as the top. At that time, elongation or wrinkles is generated by tension around the fold portion FF, particularly around the portion where the thickness thereof changes. In order to prevent such a phenomenon from occurring, in this embodiment, as shown in FIG. 6, a groove 15aa is provided in the film transport roller 15a. In the bag making and packaging machine 1, there are a plurality of film transport rollers 15 a, but actually, a groove 15 aa is provided in the film transport roller 15 a that supports the film F that passes through the fold forming mechanism 32 and is transported to the former 502. Yes.

  FIG. 20 is a partial cross-sectional view of a film transport roller that supports the film F that is transported to the former through the pleat forming mechanism. In FIG. 20, the fold portion FF of the film F is fitted into the groove 15aa. Although a certain tension is applied to the film F, when the film F is wound around the film conveying roller 15a, the film F does not have a mountain shape with the pleated portion FF as the top, so that the film F is partially pulled strongly ( In particular, pulling around the portion where the thickness changes) is prevented. As a result, the occurrence of elongation or wrinkles is suppressed.

<Features>
(1)
In the bag making and packaging machine 1, the raising plate 501b raises the pleated portion FF from the tubular film F. Although the posture of the tubular film F is tilted by the rising operation of the pleat portion FF, the piston head 532a pushes the projection 531e of the operated portion 531d from the outside to the inside of the tubular film F, so the first action portion 531a. And the 2nd action part 531b rotates and pushes the inner surface of the cylindrical film F toward the outer side. As a result, the posture of the cylindrical film F is corrected, the situation where the horizontal sealing process is performed while being tilted is avoided, and bag-making defects are prevented.

(2)
In the bag making and packaging machine 1, the folding plate 541 is sandwiched between the first action part 531a and the second action part 531b in the tubular film F when the first action part 531a and the second action part 531b rotate. Push the surface facing the space from the outside to the inside. As a result, the surface is folded inward with the center as the center, and the surface is used as the bottom surface 101 of the bag, thereby realizing the upright bag 10.

<First Modification>
In the above embodiment, the folding plate 541 is separated from the folding portion G formation planned area after folding the folding portion G formation planned area, so that it is not easy to maintain the folding shape attached to the folding plate 541. Here, a mechanism in which the folded shape is maintained without hindering the conveyance of the tubular film F will be described.

  FIG. 21 is a perspective view of a film that is formed into a cylindrical shape and passes between the vertical sealing mechanism and the horizontal sealing mechanism by the bag making and packaging machine according to the first modification. In FIG. 21, in the bag making and packaging machine 1, the folding mechanism 540 further includes a nozzle 543. In order to form the folding part G together with the folding plate 541, the nozzle 543 blows air from the outside to the inside of the area where the folding part G is to be formed. In addition, the folding part G formation scheduled area is a surface located on the opposite side to the fold part FF of the cylindrical film F.

  As shown in FIG. 21, the nozzle 543 is connected to a pipe 543 a that guides air to the area where the folding portion G is to be formed. In the region where the fold portion G is to be formed, the fold marks of the fold portion G formed earlier remain, and the pipe 543a extends along the fold marks so that the pipe 543a is not in contact with the fold marks. Try to keep the shape. Furthermore, since the air that exits from the pipe 543a travels along the folding trace, the area where the folding portion G is to be formed is extended along the conveying direction of the cylindrical film F. As a result, meandering of the tubular film F is prevented and generation of wrinkles is suppressed. Further, as a secondary effect, the posture of the region where the folded portion G is planned to be distorted when the fold portion FF rises by the raising plate 501b is corrected.

  As described above, since the air emitted from the pipe 543a applies a constant pressure to the folded shape attached by the folding plate 541, the folded shape is maintained without disturbing the conveyance of the cylindrical film F. . In the first modification, the pipe 543a is connected to the nozzle 543, but even if air is blown directly from the nozzle 543 to the area where the folding portion G is to be formed, a certain pressure acts to the necessary folding depth. The effect similar to the above can be obtained.

<Second Modification>
In the above embodiment, since the tubular film F is covered with the former 502 from the outside, the rising of the fold portion FF is delayed. In order to accelerate the rise of the pleat portion FF, in the second modification, a notch portion 502a is provided in the former 502 as shown in FIG. The notch portion 502a is opposed to the fold portion FF that is raised by the raising plate 501b.

  The raising plate 501b raises the fold portion FF on the downstream side of the notch portion 502a, but the starting point where the fold portion FF floats away from the tubular film F is the fold portion FF and the raising plate 501b. It is upstream from the position of contact. By providing the notch portion 502a, there is no member that interferes even if the fold portion FF is lifted away from the cylindrical film F, so that the rise of the fold portion FF is not hindered and the rise of the fold portion FF is accelerated. .

  In other words, since the section where the former 502 covers the pleat portion FF is finished earlier, the rise of the pleat portion FF is accelerated accordingly. As a result, the rise of the pleat portion FF is sufficiently advanced, and generation of wrinkles on the tubular film F is suppressed. In addition, since the rising section of the fold portion FF becomes long, the rising portion of the fold portion FF progresses naturally and smoothly, and the posture of the tubular film F is not easily collapsed.

  FIG. 22 is a perspective view of a fixing base for fixing the former. In FIG. 22, a fixing base 503 for fixing the former 502 is provided with a hole 503a for widening a gap between the notch 502a and the fixing base 503. This is because, even if the section in which the former 502 covers the pleated portion FF ends early by providing the notch portion 502a, if the fixed base 503 that fixes the former 502 covers the notched portion 502a, the fixed base 503 and the pleated portion This is because the rise of the fold portion FF is delayed due to interference with the FF. By providing the hole 503a that widens the gap between the notch 502a and the fixing base 503, even if the pleat FF rises from the notch 502a, the fold FF and the fixing base 503 do not interfere with each other.

[Other Embodiments]
FIG. 23 is a control block diagram of the bag making and packaging machine. In FIG. 23, the vacuum pump 141 and the heaters 161a, 171a, 321, and 326 have high power consumption among the devices that are permanently installed in the bag making and packaging machine 1, and according to the applicant's investigation, The total accounts for about 85% of the total power consumption of the bag making and packaging machine 1.

  Conventionally, in the vacuum pump 141, since the pull-down belt 14 reliably sucks and conveys the film F, negative pressure is applied through a number of holes on the belt surface, and the bag making and packaging machine 1 is temporarily stopped. It was driven even when waiting.

  The heaters 161a, 171a, 321, and 326 are used for the vertical sealing process of the film F, the horizontal sealing process, and the sealing process of the fastener ZP, and when the bag making and packaging machine 1 is temporarily stopped and is on standby. Even if it exists, it was maintained at preset temperature (for example, 120 degreeC) in preparation for the resumption of a driving | operation.

  However, this time, in the bag making and packaging machine 1, the automatic sleep mode, the standby vacuum pump control mode, and the standby heater control mode are executed to suppress the power consumption of the vacuum pump 141 and the heaters 161a, 171a, 321, and 326. Yes. Hereinafter, each control mode will be described.

(Automatic sleep mode)
The control panel 6 has time setting keys 6 a and 6 b for setting the start time and the end time of the bag making and packaging machine 1 and a sleep key 6 c for turning off the power of the bag making and packaging machine 1. The controller 60 mounted in the bag making and packaging unit 5 turns off the power of the bag making and packaging machine 1 when the sleep key 6c is pressed, and also turns off the power to the heaters 161a, 171a, 321 and 326. . A state in which the power supply and heater energization are turned off by the controller 60 is referred to as a sleep mode.

  The controller 60 automatically cancels the sleep mode when the start time is reached and turns on the power of the bag making and packaging machine 1 except when the operator directly turns on the power. Turn off the machine and enter sleep mode. However, the operator can operate the control panel 6 even in the sleep mode. At this time, the fact that the operator is in the sleep mode is displayed on the liquid crystal display 7. Therefore, the operator can easily recognize that the sleep mode is being executed, and can cancel it as necessary.

  In order for the heaters 161a, 171a, 321, and 326 to function sufficiently, an idling time is required for the heaters 161a, 171a, 321, and 326 to reach the set temperature. For this reason, the start time is preferably set to a time that is earlier than the production start time by the idling time of the heater. Moreover, what is necessary is just to set end time to production end time.

  For example, if the daily production time zone is 8 hours from 8 o'clock to 12 o'clock and 13 o'clock to 17 o'clock, the idling time of the heaters 161a, 171a, 321, 326 is 10 minutes, and 7:50 The sleep mode is canceled for a total of 8 hours and 20 minutes from 12:00 to 12:00 and from 12:50 to 17:00, and otherwise the sleep mode is set.

  When the power-on / off of the bag making and packaging machine 1 is left to the worker as in the past, depending on the worker, the person who turns on the power for 30 minutes or more before the production start time, or at the end time Since some people did not turn off the power, the power was wasted. However, when the sleep mode is executed, the power-on time is maintained at a reasonable time, which saves energy.

  In this embodiment, the sleep mode can be turned on / off by the sleep key 6c, or the sleep mode can be automatically turned on / off by setting the start time and the end time, but the present invention is not limited to this. Instead, for example, a sleep mode automatic on timer may be provided to enter the sleep mode when the timer expires. However, if the bag making and packaging machine 1 is temporarily stopped during production, the net production time may not match the timer setting time, which may cause inconvenience in the production quantity. Even if the timer expires, it may be programmed not to automatically enter the sleep mode until the end of production is input from the upstream process of the production line.

(Standby vacuum pump control)
In the bag making and packaging machine 1, standby vacuum pump control is executed in order to suppress power consumption during standby of the vacuum pump 141. In the standby vacuum pump control, whether or not the pull-down belt 14 and the seal jaw 171 are operating is monitored, and when they are not operating, the bag making and packaging machine 1 is temporarily stopped and waiting. The vacuum pump 141 is automatically turned off.

  Usually, the bag making and packaging machine 1 is temporarily stopped due to switching of the film F or due to trouble, and the operator restarts the operation. At this time, in order to prevent the operation from being started while the vacuum pump 141 is stopped, it is displayed on the liquid crystal display 7 that the vacuum pump 141 is stopped.

(Standby heater control)
In the bag making and packaging machine 1, standby heater control is executed in order to suppress power consumption during standby of various heaters. In the standby heater control, the temperature of the heaters 161a, 171a, 321 and 326 is lowered by about 10 ° C. from the set temperature during operation while the bag making and packaging machine 1 is temporarily stopped and is waiting. The operation is started after the temperatures of 161a, 171a, 321, and 326 reach the set temperature. Note that, as means for shortening the time from when the operation resumption command is issued until the operation is actually started, downsizing of the block on which the heaters 161a, 171a, 321, 326 are mounted, or increasing the capacity of the heater, etc. Is effective.

  As described above, the present invention is useful for a bag making and packaging machine for manufacturing a bag having a fastener.

1 Bag making and packaging machine 32 Folding unit (predetermined processing means)
501 Tube (Cylinder forming mechanism)
501c Raising plate (raising mechanism, interrupt plate)
502 Former (Cylinder forming mechanism)
530 Correction mechanism 531 Correction member 531a First action part 531b Second action part 531c Support shaft 531d Operated part 532 Operation member 540 Folding mechanism

International Publication WO01 / 24999

Claims (15)

A cylinder forming mechanism for forming a cylindrical packaging material along the outer periphery of the cylindrical body, the packaging material including a folded part folded along the conveying direction and the folded part overlapping the main body part;
A raising mechanism that raises the folding part from the main body part of the cylindrical packaging material;
A correction mechanism for correcting the posture of the cylindrical packaging material tilted by the rising operation of the folding portion by urging the cylindrical packaging material from the inside to the outside ;
A bag making and packaging machine. Predetermined processing means for forming a folded portion having higher rigidity than a portion not processed into the predetermined state by processing the packaging material into a predetermined state including at least folding along the conveyance direction;
A cylinder forming mechanism for forming a cylindrical packaging material along the outer periphery of the cylindrical body with the packaging material in a state where the folding portion overlaps the main body portion;
A raising mechanism that raises the folding part from the main body part of the cylindrical packaging material;
A correction mechanism for correcting the posture of the cylindrical packaging material tilted by the rising operation of the folding portion by urging the cylindrical packaging material from the inside to the outside ;
A bag making and packaging machine. The correction mechanism is
A correction member disposed on the inside of the path through which the inner surface of the cylindrical packaging material passes, and facing a predetermined region of the inner surface;
An operation member that is disposed outside the path and that operates the correction member to apply an outward force to the predetermined region;
Including,
The bag making and packaging machine according to claim 1 or 2. The correction member is rotatably supported by the cylindrical body by a support shaft orthogonal to the conveyance direction of the cylindrical packaging material,
The operation member rotates the correction member in a direction in contact with the predetermined region of the cylindrical packaging material.
The bag making and packaging machine according to claim 3. Further comprising a folding mechanism that is disposed on the opposite side of the correction member across the cylindrical packaging material, and forms a folding surface by pressing the predetermined area;
The folding mechanism pushes the predetermined area from the outside to the inside of the cylindrical packaging material when the correction member rotates toward the predetermined area,
The bag making and packaging machine according to claim 4. The straightening member is
An action portion supported by the support shaft in the vicinity of an end of the cylindrical body and extending a predetermined length from the support shaft in the conveying direction of the cylindrical packaging material;
An operated part that is connected to the action part, has a length shorter than the action part, and extends in a direction opposite to the conveying direction of the cylindrical packaging material from the support shaft;
Have
The operation member rotates the action portion toward the predetermined region of the cylindrical packaging material by pressing the operated portion of the correction member from the outside to the inside of the cylindrical packaging material.
The bag making and packaging machine according to claim 5. The action portion of the correction member has a first action portion and a second action portion that separate opposing surfaces of the cylindrical packaging material in opposite directions,
A space between the first action part and the second action part is opposed to the predetermined area;
The folding mechanism inserts the predetermined region into the space and folds it;
The bag making and packaging machine according to claim 6. The folding part is located on the opposite side of the predetermined region across the correction member,
The bag making and packaging machine according to any one of claims 3 to 7. In order to form a folding surface in the cylindrical packaging material by pushing a predetermined region located on the opposite side of the folding portion of the cylindrical packaging material from the outside to the inside of the cylindrical packaging material, at least air in at least the predetermined region Further comprising a folding mechanism having a nozzle for spraying,
The bag making and packaging machine according to claim 1 or 2. A pipe that guides air to the predetermined area is connected to the nozzle,
The pipe extends in the conveying direction of the cylindrical packaging material in contact with the predetermined region,
The bag making and packaging machine according to claim 9. The folding mechanism further includes a folding member that repeats contact and dissociation with the predetermined region,
The folding surface is formed by the air blown from the pipe and the folding member pressing the predetermined area.
The bag making and packaging machine according to claim 10. The cylinder forming mechanism has a cover member that covers the cylindrical packaging material from the outside,
The cover member is provided with a notch portion facing the folding portion that rises by the raising mechanism.
The bag making and packaging machine according to claim 1 or 2. The cylinder forming mechanism further includes a fixing base for fixing the cover member,
The fixing base is provided with a hole for widening a gap between the notch and the fixing base.
The bag making and packaging machine according to claim 12. The raising mechanism has an interruption plate that interrupts between the main body portion of the cylindrical packaging material and the folding portion conveyed downstream of the notch portion and raises the folding portion.
The bag making and packaging machine according to claim 12. A roller for supporting the packaging material conveyed from the upstream side of the cylinder forming mechanism to the cylinder forming mechanism;
The roller is provided with a groove for fitting the folded portion of the packaging material before being formed into the cylindrical packaging material.
The bag making and packaging machine according to claim 1 or 2.

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