JP2008110783A - Bag manufacturing and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain a conveyance failure such as meander or distortion of a packaging material during the process of manufacturing hem-sealed type bags. <P>SOLUTION: The bag manufacturing and packaging machine 1 includes rollers 72, a roller jutting plate 73, and a conveying mechanism 14, and is used for manufacturing the hem-sealed type bags 50 from film F. Each of the bags 50 has a side face 54 and hems 51a to 51d, which project from the side faces 54. Each of the rollers 72 has a periphery 72a and sides 72b. The roller jutting plate 73 has a first face 73a opposite to the sides 72b of the rollers 72. The conveying mechanism 14 conveys the film F such that a first portion of the film F is sandwiched between the sides 72b of the rollers 72 and the first face 73a of the roller jutting plate 73. The first portion of the film F is formed into the hems 51a to 51d by its being passed between the sides 72a of the rollers 72 and the first face 73a of the roller jutting plate 73. <P>COPYRIGHT: (C)2008,JPO&INPIT

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 hem portion from a packaging material.

  2. Description of the Related Art Conventionally, there is a bag making and packaging machine that fills an object to be packaged such as snack confectionery in the bag while manufacturing the bag.

  There exists a thing of patent document 1 as a bag making packaging machine which manufactures the kind of bag called a hem seal type. That is, in general, in such a bag making and packaging machine, a sheet-like film is sent out from a film roll by a transport mechanism constituted by a pull-down belt and transported in a predetermined transport direction. And the sheet-like film sent out from the film roll is wound around a square tube-like tube by a former, and is formed into a square tube shape. Subsequently, a fold extending in the vertical direction is attached to the corner of the rectangular tube-shaped film by the hem forming unit, and the hem portion is formed. In addition, the vertical edges of the films formed into a rectangular tube shape are heat-sealed (heat-welded) by a vertical sealing mechanism. And, the inside of the rectangular tube-like film that finally becomes a bag is filled with an article to be packaged via a tube, and a portion that becomes the upper end portion of the bag by a horizontal sealing mechanism below the tube and a lower end portion of the following bag After the heat sealing is simultaneously applied to the part to be formed, the center of the heat sealing part (lateral sealing part) is cut with a cutter.

And in patent document 1, the plate-shaped press guide is provided so that one side of a square tube-like tube may be opposed. The pressing guide is disposed with a slight gap between the pressing guide. Further, on the left and right sides of the pressure guide, plate-shaped guide walls are arranged opposite to the left and right side surfaces of the pressure guide. The pressing guide is disposed with a slight gap between the left and right guide walls. Then, the film formed into a rectangular tube shape passes through a slight gap between the tube, the pressing guide, and the guide wall, so that a hem portion is formed at the corner of the rectangular tube film. It has become.
JP 2004-352306 A

  However, as in Patent Document 1, when a hem portion is formed by sandwiching a film between a tube, a plate-shaped pressing guide, and a plate-shaped guide wall, the film and these tubes, the pressing guide, and the guide wall And the conveyance force from the conveyance mechanism is applied unevenly to each part of the film, and as a result, the film may be distorted, jammed, or meandered.

  An object of the present invention is to suppress poor conveyance such as meandering and distortion of a packaging material in the process of manufacturing a hem seal type bag.

  The bag making and packaging machine according to the first aspect of the present invention includes a roller, a side facing portion, a transport portion, and a seal portion, and manufactures a bag from the packaging material. The manufactured bag has a side part and a hem part. The hem part protrudes from the side part. The roller has a peripheral surface and a side surface. The side facing portion has a side facing surface that faces the side surface of the roller. The transport unit transports the packaging material in such a manner that the first portion of the packaging material is sandwiched between the side surface of the roller and the side surface of the side surface facing portion. The seal unit seals a predetermined position of the packaging material conveyed by the conveyance unit. The first portion is formed into the shape of the hem portion by passing between the side surface of the roller and the side surface facing surface of the side surface facing portion.

  This bag making and packaging machine is a packaging machine for producing hem seal type bags. In this bag making and packaging machine, in a process in which the packaging material is conveyed in a predetermined conveyance direction by the conveyance unit, a part (first portion) of the packaging material is formed between the roller and the side surface facing portion that faces the side surface of the roller. It is sandwiched between and creased to form a hem part. Thus, in this bag making and packaging machine, since one of the members that sandwich the packaging material in order to form the hem portion in the packaging material is a roller, the packaging material is smoothly guided in the transport direction. . As a result, in this bag making and packaging machine, poor conveyance such as meandering and distortion of the packaging material is suppressed in the manufacturing process of the hem seal type bag.

  The bag making and packaging machine according to the second invention is the bag making and packaging machine according to the first invention, further comprising a cylindrical portion. The cylindrical portion has a circumferential surface facing surface that faces the circumferential surface of the roller. The transport unit is an aspect in which the inner surface of the cylindrical packaging material is along the outer surface of the cylindrical portion, and the vicinity of the first portion of the packaging material is opposed to the circumferential surface of the roller and the circumferential surface of the cylindrical portion The packaging material is transported in such a manner as to be sandwiched between the surfaces.

  In this bag making and packaging machine, a cylindrical packaging material is conveyed in a predetermined conveyance direction along the cylindrical portion. At this time, the inner surface of the tubular packaging material is opposed to the outer surface of the tubular portion. When the hem portion is formed on the packaging material, the first portion of the packaging material is sandwiched between the roller and the side surface facing portion facing the side surface of the roller, and the vicinity of the first portion is the roller. It is sandwiched between the cylindrical portion facing the peripheral surface of the roller. Thereby, the crease | fold which distinguishes the hem part which protrudes from a side part and its root is firmly attached to a bag, and the appearance of the bag manufactured is improved.

  A bag making and packaging machine according to a third aspect of the invention is the bag making and packaging machine according to the first or second aspect of the invention, wherein the roller has a rotating shaft and the peripheral surface of the roller is conveyed by the conveying unit. It rotates around the rotation axis by abutting on the rotating shaft. The rotating shaft extends in a direction orthogonal to the packaging material conveyance direction.

  In this bag making and packaging machine, the roller contacts the packaging material, and the roller rotates as the packaging material is conveyed in a predetermined conveyance direction. Thereby, in this bag making and packaging machine, friction applied to the packaging material is reduced, and conveyance failures such as meandering and distortion of the packaging material are further suppressed.

  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 second aspect of the present invention, further comprising a forming part and a base part. The forming unit is disposed on the upstream side of the tubular part in the conveying direction of the packaging material, is fixed to the tubular part, and forms the packaging material from the sheet shape into the tubular shape together with the tubular part. The base part supports the molding part fixedly. The roller is fixed to the base.

  In this bag making and packaging machine, a sheet-like packaging material is formed into a cylindrical shape by a forming portion and a cylindrical portion. And the cylindrical part is being fixed to the shaping | molding part, the shaping | molding part is being fixed to the base, and the roller is being fixed to this base. That is, since the position of the roller is stable with respect to the cylindrical portion, poor conveyance such as meandering and distortion of the packaging material sandwiched and conveyed between the roller and the cylindrical portion is further suppressed.

  A bag making and packaging machine according to a fifth aspect of the present invention is the bag making and packaging machine according to any one of the first to fourth aspects, wherein the seal portion has a hem heater member. The hem heater member is disposed downstream of the roller and the side facing portion in the packaging material conveyance direction, and heats the first portion formed in the shape of the hem portion.

  In this bag making and packaging machine, the hem heater member arranged on the downstream side of the roller heats the first portion of the packaging material formed into the shape of the hem portion by the roller. Thereby, the shape of a hem part is stabilized.

  A bag making and packaging machine according to a sixth invention is the bag making and packaging machine according to any one of the first to fifth inventions, wherein the radius of the roller is larger than the width in the protruding direction of the hem portion protruding from the side surface portion. Also long.

  In this bag making and packaging machine, the radius of the roller is longer than the protruding width of the hem portion. Therefore, the first portion of the packaging material that will later become the hem portion comes into contact only with the portion of the side surface of the roller that rotates in the transport direction. Thereby, in this bag making and packaging machine, friction applied to the packaging material is further reduced, and conveyance failures such as meandering and distortion of the packaging material are further suppressed.

  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 first, second or fourth aspect, wherein the roller has a rotating shaft. The rotating shaft extends in a direction orthogonal to the packaging material conveyance direction. The difference between the radius of the roller and the radius of the rotating shaft is longer than the width in the protruding direction of the hem portion protruding from the side surface portion.

  In this bag making and packaging machine, the distance obtained by subtracting the radius of the rotating shaft from the radius of the roller is longer than the protruding width of the hem portion. Therefore, even when the rotation shaft of the roller protrudes from the side surface of the roller, the first portion of the packaging material that will later become the hem portion does not hit the rotation shaft of the roller. Thereby, in this bag making packaging machine, conveyance failures such as meandering and distortion of the packaging material are further suppressed.

  A bag making and packaging machine according to an eighth aspect of the present invention includes a first roller, a second roller, a first side facing portion, a second side facing portion, a transport portion, and a seal portion, and the bag is made from the packaging material. To manufacture. The manufactured bag has a side part, a first hem part, and a second hem part. The 1st hem part protrudes from the left end of the side part. The second hem part protrudes from the right end of the side part. The first roller has a first peripheral surface and a first side surface. The second roller has a second peripheral surface and a second side surface. The first side surface facing portion has a first side surface facing the first side surface. The second side surface facing portion has a second side surface facing surface that faces the second side surface. The transport unit includes a first part of the packaging material sandwiched between the first side surface and the first side surface facing surface, and a second part of the packaging material sandwiched between the second side surface and the second side surface facing surface. The packaging material is conveyed in such a manner. The seal unit seals a predetermined position of the packaging material conveyed by the conveyance unit. The first portion is shaped into the shape of the first hem portion by passing between the first side surface and the first side surface. The second portion is molded into the shape of the second hem portion by passing between the second side surface and the second side surface.

  This bag making and packaging machine is a packaging machine for producing hem seal type bags. And in this bag making packaging machine, a hem part is formed in the several location of a bag. In this bag making and packaging machine, a plurality of rollers are prepared to form a plurality of hem portions. Therefore, compared with the case where a hem part is shape | molded in two places using the right-and-left end of one plate-shaped member like patent document 1, the position adjustment of the some roller used with this bag making packaging machine is Since each can be performed independently, the shape of the hem portion can be easily adjusted.

  In the bag making and packaging machine according to the present invention, in the process in which the packaging material is conveyed in the predetermined conveyance direction by the conveyance unit, a part of the packaging material is sandwiched between the roller and the side facing portion facing the side surface of the roller. A crease is added to form a hem portion. Thus, in this bag making and packaging machine, since one of the members that sandwich the packaging material in order to form the hem portion in the packaging material is a roller, the packaging material is smoothly guided in the transport direction. . As a result, in this bag making and packaging machine, poor conveyance such as meandering and distortion of the packaging material is suppressed in the manufacturing process of the hem seal type bag.

<Overall configuration>
A bag making and packaging machine 1 according to an embodiment of the present invention is shown in FIGS. 1 and 2. The bag making and packaging machine 1 shown in these drawings is a machine for bagging products such as potato chips. The bag making and packaging unit 5 for mainly bagging products and the bag making and packaging unit 5 form a bag. The film supply unit 6 supplies the film F. In addition, operation switches 7 are disposed on the front surface of the bag making and packaging unit 5, and a liquid crystal display 8 indicating an operation state is disposed at a position where a user who operates the operation switches 7 can visually recognize.

  This bag making and packaging machine 1 is a flexible bag sizing and packaging machine capable of producing a plurality of types of bags having different shapes from each other by exchanging appropriate parts, for example, a so-called hem seal type bag. 50 (see FIG. 3) or so-called pillow type bags 60 (see FIG. 4) can be produced. FIGS. 5 and 6 show the main part of the bag making and packaging machine 1 when the hem seal type bag 50 is set so as to be able to be manufactured. FIG. 7 shows that the pillow type bag 60 can be manufactured. The main part of the bag making and packaging machine 1 when set in this way is shown. The bag making and packaging machine 1 can be set so that bags other than the hem seal type bag 50 and the pillow type bag 60 can be manufactured, but in the following, the hem seal type bag 50 and the pillow type bag The case where the bag 60 is manufactured shall be illustrated. 1 and 2 show the bag making and packaging machine 1 in a state where the hem seal type bag 50 is set so as to be manufactured.

  FIG. 3 shows a hem seal type bag 50. The hem seal type bag 50 is a bag formed from one rectangular sheet-like film F, and includes four side portions 54, four hem portions 51a to 51d, a vertical seal portion 52, 2 And two horizontal seal portions 53. The bag 50 is formed by forming a sheet-like film F into a square tube shape to form four side portions 54, and heat-sealing both edges of the overlapping film F in the vertical direction by being formed into a square tube shape. The vertical seal portion 52 is formed, and the four corners of the rectangular tube-shaped film F are heat-sealed in the vertical direction to form the four hem portions 51a to 51d, and the upper and lower ends of the bag 50 of the rectangular tube-shaped film F Is manufactured by heat-sealing in the horizontal direction to form two horizontal seal portions 53. The vertical seal portion 52 extends in the vertical direction near the center of one side surface portion 54.

  On the other hand, FIG. 4 shows a pillow type bag 60. The pillow type bag 60 is also a bag formed from one rectangular sheet-like film F, and includes a body portion 61, a vertical seal portion 62, and two horizontal seal portions 63. The bag 60 is formed by forming a sheet-like film F into a cylindrical shape and heat-sealing both edges of the overlapping film F in the vertical direction to form a vertical seal portion 62. The film F is manufactured by thermally sealing the upper and lower ends of the bag 60 in the lateral direction to form two lateral seal portions 63.

<Bag making and packaging machine capable of producing hem seal type bags>
First, the bag making and packaging machine 1 in a state where the hem seal type bag 50 is set so that it can be manufactured will be described.

(1) Film Supply Unit The film supply unit 6 is a unit that supplies a sheet-like film F to the forming mechanism 13 of the bag making and packaging unit 5 described later, and is provided adjacent to the bag making and packaging unit 5. ing. A film roll around which the film F is wound is set in the film supply unit 6, and the film F is fed out from the film roll.

(2) Bag-making and packaging unit The bag-making and packaging unit 5 is mainly composed of a forming mechanism 13 for forming the sheet-like film F sent from the film supply unit 6 into a rectangular tube shape, and a rectangular tube shape by the forming mechanism 13. A transport mechanism 14 that transports the formed film F (hereinafter, referred to as a rectangular tube-shaped film Fc) downward, a hem forming mechanism 18 that forms hem portions 51a to 51d at four corners of the rectangular tube-shaped film Fc, and a rectangular tube The vertical sealing mechanism 15 that seals the overlapping portion of the film-like film Fc in the vertical direction and the horizontal sealing mechanism 17 that seals the bag 50 by sealing the upper and lower ends of the rectangular tubular film Fc in the horizontal direction. And a support frame 12 that supports each of these mechanisms. A casing 9 is attached around the support frame 12.

a) Forming Mechanism The forming mechanism 13 includes a tube 31 and a former 32.

  The tube 31 is a rectangular tube-like member, extends in the vertical direction, and has upper and lower ends opened. The tube 31 is disposed so as to penetrate the opening provided near the center of the top plate 29 of the support frame 12 in the vertical direction, and is fixed to the former 32 via a bracket (not shown). A product falling by a predetermined amount from the computer scale 2 provided above the bag making and packaging unit 5 is put into the opening at the upper end of the tube 31. The computer scale 2 is a combination weighing device including a feeder, a pool hopper, a lightweight hopper, a collective discharge chute, and the like.

  The former 32 is disposed near the upper portion of the tube 31 so as to surround the tube 31. The shape of the former 32 is such that the sheet-like film F sent from the film supply unit 6 is formed into a rectangular tube shape when passing through the gap between the former 32 and the tube 31. The former 32 is fixed to the substrate 33 a of the support member 33 supported by the support frame 12.

b) Heme Formation Mechanism As shown in FIGS. 5 and 6, the hem formation mechanism 18 includes a pair of hem forming units 70 and 71 and a pair of hem seal units 80 and 81. The hem forming units 70 and 71 are disposed symmetrically with respect to the tube 31 extending in the vertical direction, and are disposed below the joint portion between the tube 31 and the former 32. The hem seal units 80 and 81 are arranged symmetrically with respect to the tube 31 extending in the vertical direction, and are respectively directly below the hem forming units 70 and 71 and directly above pull-down belts 40 and 41 described later. Has been placed. Since the hem forming units 70 and 71 have the same configuration as each other, and the hem seal units 80 and 81 have the same configuration as each other, only the hem forming unit 70 and the hem seal unit 80 will be described below. The description of the hem forming unit 71 and the hem seal unit 81 is omitted.

  As shown in FIGS. 8 and 9, the hem forming unit 70 mainly includes a pair of rollers 72 and 72 and a pair of roller contact plates 73 and 73, and the hem seal unit 80 mainly includes The heater block 82 is composed of a pair of heater blocks 82 and 82 and a heater block cover plate 83.

  Each roller 72 is fixed to a substrate 33 a of a support member 33 that supports the former 32 via a connecting member 77. Note that an opening is provided in the central portion of the substrate 33a, and the outline of the opening has a shape that is slightly larger than the outer shape of the cross section of the tube 31. It penetrates in the vertical direction. One of the two rollers 72, 72 is disposed near the left end of the side surface 31a of the tube 31, and the other roller 72 is disposed near the right end of the side surface 31a of the tube 31. The rollers 72 and 72 extend in directions in which the respective rotation shafts 72c and 72c are orthogonal to the conveyance direction of the rectangular tube-shaped film Fc, that is, directions orthogonal to the height direction of the tube 31. 72 a and 72 a are arranged to face the side surface 31 a of the tube 31. The rollers 72 and 72 are disposed at the same height position.

  Each roller contact plate 73 is a sheet metal member bent into an L shape, and has a first surface 73a and a second surface 73b that are orthogonal to each other. Each first surface 73 a faces one of the two side surfaces 31 b and 31 c adjacent to the side surface 31 a of the tube 31, and each second surface 73 b of the support member 33 that supports the former 32. Opposite the substrate 33a. Each roller contact plate 73 is fixed to the substrate 33a by a fixing member such as a screw (not shown). Each roller contact plate 73 has substantially the same width in the lateral direction as the tube 31, but has edge portions 73c and 73c in the vicinity of the left and right ends of the first surface 73a. The edge portions 73c and 73c are opposed to the outer side surfaces 72b and 72b of the rollers 72 and 72, respectively.

  The peripheral surfaces 72a and 72a of the rollers 72 and 72 and the side surface 31a of the tube 31 are opposed to each other with a gap corresponding to the thickness of the film Fc, and the outer side surfaces 72b and 72b of the rollers 72 and 72 are opposed to the roller. The first plates 73a and 73a of the contact plates 73 and 73 (more specifically, the first surfaces 73a and 73a of the edge portions 73c and 73c) are opposed to each other with a gap of about two thicknesses of the film Fc. The first surfaces 73a and 73a of the roller contact plates 73 and 73 and the side surfaces 31b and 31c of the tube 31 are opposed to each other with a gap corresponding to the thickness of the film Fc. Therefore, when the bag making and packaging machine 1 is driven, the rectangular tubular film Fc passes through these gaps and is further conveyed downstream (see FIG. 10). At this time, the circumferential surface of each roller 72 72a and the side surface 72b, the first surface 73a of each roller contact plate 73, and the side surfaces 31a to 31c of the tube 31 are in contact with the rectangular tubular film Fc being conveyed. As a result, creases are formed at the four corners of the rectangular tubular film Fc to form the hem portions 51a and 51b, and each roller 72 is dragged by the rectangular tubular film Fc being transported to center on the rotation shaft 72c. Rotate to. And by this rotation of each roller 72, the friction with the film F and each roller 72 is suppressed, and smooth conveyance without the meandering of the film F is implement | achieved.

  Further, as each roller 72, a roller whose distance obtained by subtracting the radius of the rotating shaft 72c from the radius becomes longer than the width of the hem portions 51a to 51d is used. In addition, the width | variety of hem parts 51a-51d here means the protrusion width | variety from the side part 54 of hem parts 51a-51d. As a result, the hem portions 51a to 51d (more precisely, the portions that become the hem portions 51a to 51d of the rectangular tube film Fc) of the square tubular film Fc being conveyed are conveyed in the conveyance direction among the side surfaces 72b of the rollers 72. Only the rotating part, and does not contact the rotating shaft 72c protruding from the side surface 72b of each roller 72. Therefore, the frictional force applied to the rectangular tube-shaped film Fc is reduced, and the film F is released from meandering and distortion.

  The heater blocks 82 and 82 are disposed below the rollers 72 and 72 and the roller contact plates 73 and 73 and each have a heater therein. These heaters heat the sealing surfaces of the heater blocks 82 and 82, respectively.

  The heater block cover plate 83 is disposed immediately below the rollers 72 and 72 and directly above the pull-down belt 40, and is disposed so as to face the side surface 31 a of the tube 31. The heater block cover plate 83 is fixed to the substrate 33a via a connecting member (not shown). Further, two surfaces in the thickness direction of the heater block facing plate 83 extending in the height direction are opposed to the seal surfaces of the heater blocks 82 and 82, respectively. When the bag making and packaging machine 1 is driven, the heater blocks 82 and 82 move at a predetermined timing, and the seal surfaces of the heater blocks 82 and 82 sandwich the hem portions 51a and 51b of the rectangular tubular film Fc. It is pressed against the contact plate 83. Thereby, the hem parts 51a and 51b of the rectangular tube-shaped film Fc are heat-sealed (heat-sealed).

  Note that the roller contact plates 73 and 73 included in the hem forming unit 70 are members included also in the hem forming unit 71, and are shared between the hem forming units 70 and 71.

c) Conveying mechanism The conveying mechanism 14 has a pair of pull-down belts 40 and 41, and the pull-down belts 40 and 41 are attached to a support member (not shown) suspended from the top plate 29 of the support frame 12. It is supported. The pull-down belts 40 and 41 are disposed so as to extend in the vertical direction symmetrically with respect to the tube 31 extending in the vertical direction, and come into contact with the rectangular tube-shaped film Fc wound around the tube 31 in a rectangular tube shape. It plays the role of transporting downward while adsorbing the film Fc.

  The pull-down belt 40 includes a driving roller 40a, a driven roller 40b, and a belt member 40c having a suction function. The pull-down belt 41 includes a driving roller 41a, a driven roller 41b, and a belt member 41c having a suction function. Yes. The belt member 40c is wound around the driving roller 40a and the driven roller 40b, and the belt member 41c is wound around the driving roller 41a and the driven roller 41b. The pull-down belts 40 and 41 are arranged so that the driving rollers 40a and 41a are located above the driven rollers 40b and 41b, respectively.

  The drive shaft 40d of the drive roller 40a of the pull-down belt 40 is driven to rotate by a motor 43 (see FIG. 6). When the drive roller 40a rotates with the rotation of the drive shaft 40d, the belt member 40c wound around the drive roller 40a goes around between the drive roller 40a and the driven roller 40b.

  A timing belt 44 (see FIG. 5) is wound around the drive shaft 40d of the drive roller 40a of the pull-down belt 40 and the drive shaft 41d of the drive roller 41a of the pull-down belt 41. Therefore, the power transmitted from the motor 43 to the drive shaft 40d is also transmitted to the drive shaft 41d via the timing belt 44, and the drive shaft 41d rotates with the rotation of the drive shaft 40d. That is, the pull-down belt 41 performs the same orbiting motion in accordance with the orbiting motion of the pull-down belt 40. And the revolving motion of this pull-down belt 40 and 41 is adjusted so that it may be performed at the same speed. Accordingly, a substantially uniform conveying force is applied to the rectangular tubular film Fc conveyed along the tube 31 from the left and right sides with respect to the conveying direction, and the film F is distorted or broken in the conveying process. Instead, it is processed into the bag 50 while keeping the square tube shape orderly.

d) Vertical Seal Mechanism The vertical seal mechanism 15 is supported by a support member (not shown) suspended from the top plate 29 of the support frame 12, and is arranged to extend in the vertical direction along the tube 31. ing. The vertical seal mechanism 15 occupies the same position in the height direction as the four heater blocks 82 of the hem seal units 80 and 81 (see FIG. 5). The vertical seal mechanism 15 heats and seals the overlapping portion extending in the vertical direction of the rectangular tube-shaped film Fc wound around the tube 31 against the side surface 31b of the tube 31 with a constant applied pressure, thereby sealing the vertical seal portion. 52 is a mechanism for forming 52. The vertical seal mechanism 15 has a heater, a heater belt heated by the heater, and the like, faces the side surface 31b of the tube 31, and extends in the vertical direction near the center of the side surface 31b.

e) Lateral Seal Mechanism As shown in FIG. 6, the lateral seal mechanism 17 is disposed below the tube 31 and supported by the support frame 12. The lateral seal mechanism 17 includes a pair of left and right rotating shafts 17a and 17a, a pair of left and right seal jaws 17b and 17b, and a pair of left and right arm members 17c and 17c.

  The seal jaws 17b and 17b have a heater inside. The heaters heat the sealing surfaces of the sealing jaws 17b and 17b (surfaces that face each other during horizontal sealing), and the rectangular tubular film Fc sandwiched between the sealing jaws 17b and 17b is heat-sealed (heat-sealed) to be horizontal. A seal portion 53 is formed. The seal jaws 17b and 17b are connected to the rotation shafts 17a and 17a via the arm members 17c and 17c, and turn around the rotation shafts 17a and 17a. The rotary shafts 17a and 17a pivot the seal jaws 17b and 17b, move horizontally so as to be close to and away from each other, and sandwich the square tubular film Fc at appropriate timing with the seal jaws 17b and 17b. Let the action take place.

(3) Hem sealing operation of bag making and packaging machine When the transport mechanism 14 is driven, the film F is unwound from the film roll of the film supply unit 6 and guided to the forming mechanism 13. In the forming mechanism 13, the sheet-like film F unwound from the film roll advances along the surface of the former 32 and winds around the outer surface of the rectangular tubular former 31 when passing through the gap between the former 32 and the tube 31. It is attached to form a square tubular film Fc. After that, the rectangular tubular film Fc is conveyed downward so that the inner surface thereof is along the outer surface of the tube 31, and when passing through the hem forming units 70 and 71, the hem portions 51a to 51d are provided at the four corners. Molded.

  More specifically, in the hem forming units 70, 71, the portions that become the hem portions 51 a to 51 d of the square tubular film Fc are the four side surfaces 72 b of the four rollers 72 and the four roller contact plates 73. The portions sandwiched between the edge portions 73 c and the portions that become the hem portions 51 a to 51 d of the rectangular tube-shaped film Fc are the two side surfaces 31 a of the tube 31 and the four peripheral surfaces 72 a of the four rollers 72. It is sandwiched between. Further, the portion that becomes the side surface portion 54 of the rectangular tube-shaped film Fc is sandwiched between the two side surfaces 31 b and 31 c of the tube 31 and the first surface 73 a of the roller application plate 73. Then, the rectangular tubular film Fc is conveyed downward by the conveying mechanism 14 with the predetermined portion sandwiched between the predetermined gaps, and a crease is formed in the rectangular tubular film Fc. Hem portions 51a to 51d are formed. Thereafter, the hem portions 51 a to 51 d formed in the hem forming units 70 and 71 are heat-sealed in the hem seal units 80 and 81. Further, after passing through the four rollers 72, the rectangular tubular film Fc is further conveyed downstream in a state of being sandwiched between the two side surfaces 31a of the tube 31 and the two heater block cover plates 83. I will go.

  The vertical seal mechanism 15 located at substantially the same height as the hem seal units 80 and 81 is substantially at the same time as the hem seal units 80 and 81 heat-seal the hem portions 51a to 51d of the rectangular tubular film Fc. A heat seal is applied to a portion that becomes the vertical seal portion 52 of the tubular film Fc.

  Subsequently, the rectangular tubular film Fc passes through the tube 31 and descends to the lateral seal mechanism 17. In the horizontal sealing mechanism 17, heat sealing is applied in the horizontal direction to the lower end portion of the bag 50 of the square tubular film Fc. At this time, a lump of merchandise passes from the computer scale 2 through the tube 31 and falls, and is stored in the square tubular film Fc. And in the state with which the goods are filled inside, the part which becomes the upper end part of the bag 50 of the rectangular tube-shaped film Fc is subjected to heat sealing in the lateral direction, and thereafter, it is built in one of the sealing jaws 17b and 17b. This heat-sealed portion is cut transversely by a cutter (not shown). Thereby, the preceding bag and the succeeding bag are separated.

<Bag-making and packaging machine capable of producing pillow-type bags>
Next, the bag making and packaging machine 1 in a state where the pillow type bag 60 is set so as to be manufactured is described. In the following, while explaining how the bag making and packaging machine 1 is rearranged from a state in which the hem seal type bag 50 can be manufactured to a state in which the pillow type bag 60 can be manufactured, the difference between the two states will be mainly described. Go.

  The bag making and packaging machine 1 can share the film supply unit 6 when the hem seal type bag 50 is manufactured and when the pillow type bag 60 is manufactured. Therefore, when the bag making and packaging machine 1 is rearranged, the parts included in the bag making and packaging unit 5 are mainly exchanged. However, the film roll set in the film supply unit 6 needs to be appropriately changed according to the bag to be manufactured.

  When the pillow type bag 60 is manufactured, the rectangular tube 31 is replaced with a cylindrical tube 131, and the former 32 is replaced with a former 132 capable of forming a sheet-like film into a cylindrical shape. . At this time, the support member 33 is also replaced with a support member 133 corresponding to the shape of the tube 131 and the former 132. Since the tube 31 and the former 32 are fixed to the support member 33 and the tube 131 and the former 132 are fixed to the support member 133, the support members 33 and 131 are respectively connected to the tubes 31 and 131 and the formers 32 and 132. It will be removed as an integral member. When the support member 33 is removed, the roller 72, the roller address plate 73, the heater block 82, and the heater block address plate 83 fixed to the substrate 33a of the support member 33 are simultaneously removed. When manufacturing the bag 60, unlike the case of manufacturing the hem seal type bag 50, it is not necessary to form the hem portions 51a to 51d in the bag. Therefore, it is not necessary to attach these components 72, 73, and 83 to the board 133a of the support member 133 after replacement again. Since the tube 31 and the tube 131 have different widths, after the tube 31 is replaced, the pull-down belts 40 and 41 are slid inward or outward along the left and right slide mechanisms (not shown) according to the width of the new tube 131, respectively. It is necessary to let That is, the left / right slide mechanism plays a role of absorbing the difference in the width of the tube before and after the replacement.

  When the hem forming mechanism 18 is removed, a space is formed below the former 32 and directly above the pull-down belts 40 and 41. Therefore, as shown in FIG. 11, the pull-down belts 40 and 41 are turned 180 ° inward about the respective drive shafts 40d and 41d. Accordingly, the pull-down belts 40 and 41 are moved upward by the length of the pull-down belts 40 and 41 in the longitudinal axis direction. This swiveling operation needs to be performed after removing the tube 31 before replacement and before attaching the tube 131 after replacement. Further, when the width between the new pull-down belts 40 and 41 is narrow and the pull-down belts 40 and 41 cannot be swung inward, it is possible to secure a swiveling space by sliding the pull-down belts 40 and 41 outward by the above-described left and right slide mechanism. Is possible.

  Subsequently, a pair of left and right shaker members 90 are attached to a space that is vacated by the pull-down belts 40 and 41 moving upward. The shaker member 90 vibrates the cylindrical film Fd by holding a predetermined position of a film Fd (hereinafter referred to as a cylindrical film Fd) formed into a cylindrical shape by the tube 131 and the former 132 at a predetermined timing. When this vibration operation is performed by the shaker member 90, the cylindrical film Fd is laterally sealed only at the lower end portion of the bag 50, and the product dropped from the computer scale 2 is filled therein. Is in a state. And the goods in cylindrical film Fd gather below by this vibration operation. In general, when a product dropped from the computer scale 2 is filled in the pillow type bag 60, the product is often bulky as compared with the case where the product is filled in the hem seal type bag 50. Therefore, when manufacturing the pillow type bag 60, it is preferable to attach such a shaker member 90. This is because there is no possibility that the product will be caught when the portion that becomes the upper end of the bag is laterally sealed after the product is filled.

  In addition, when the bag making and packaging machine 1 is reconfigured from a state in which the pillow type bag 60 can be manufactured to a state in which the hem seal type bag 50 can be manufactured, the recombination operation may be performed in a procedure reverse to the above-described procedure. .

<Features>
(1)
In the bag making and packaging machine 1, one of the sandwiching members that sandwich the portions to be the hem portions 51 a to 51 d of the square tubular film Fc to form the hem portions 51 a to 51 d is the roller 72. Therefore, compared with the case where a plate-shaped member is used as in the prior art, the contact area where the rectangular tubular film F being conveyed comes into contact with peripheral components is reduced. As a result, the friction applied to the rectangular tube-shaped film Fc is reduced, and the film F is transported more smoothly. As a result, the film F is unlikely to meander, be distorted, or clog.

(2)
When trying to form two hems with a single plate-like member as in the prior art, compared to the case where four rollers 72 are arranged independently as in the above embodiment, Position adjustment between the parts becomes difficult.

  On the other hand, the bag making and packaging machine 1 is a flexible bag making and packaging machine capable of producing both hem-seal type bags 50 and pillow type bags 60 by replacing appropriate parts. That is, the hem forming mechanism 18 is expected to be frequently removed or newly attached.

  Therefore, when producing a hem seal type bag in a flexible bag making and packaging machine, it is particularly preferable to use a hem forming unit of a type having a roller.

<Modification>
(A)
A power source such as a motor may be connected to the rotating shaft 72d of the roller 72, and the roller 72 may be rotated in accordance with the conveyance speed of the packaging material. The roller 72 may be a bearing.

(B)
In the said embodiment, although hem parts 51a-51d were formed in the four corners of the bag 50, you may abbreviate | omit a part of these hem parts 51a-51d.

(C)
In the above embodiment, the vertical seal portion 52 of the hem seal type bag 50 extends in the vertical direction near the center of one side surface portion 54, and the vertical seal mechanism 15 extends in the vertical direction near the center of the side surface 31 b of the tube 31. The vertical seal portion 52 of the hem seal type bag 50 extends in the vertical direction in the vicinity of the left end or right end of one side surface portion 54, and the vertical seal mechanism 15 is in the vicinity of the left end or right end of the side surface 31 b of the tube 31. It may extend in the vertical direction. In this case, the vertical seal mechanism 15 can be omitted, and the four hem portions 51 a to 51 d and the vertical seal portion 52 can be formed simultaneously by the four heater blocks 82.

  INDUSTRIAL APPLICATION This invention is useful as a bag making packaging machine which manufactures the bag which has a hem part from a packaging material, and can suppress conveyance failures, such as a meandering and distortion of a packaging material, in the manufacture process of a hem seal type bag. It has the effect.

1 is an external perspective view of a bag making and packaging machine according to an embodiment of the present invention. The side schematic diagram of the bag making packaging machine concerning one embodiment of the present invention. The figure which shows a hem seal type bag. The figure which shows a pillow type bag. The front view which shows the principal part of the bag making packaging machine of the state which can manufacture a hem seal type bag. The side view which shows the principal part of the bag making packaging machine of the state which can manufacture a hem seal type bag. The front view which shows the principal part of the bag making packaging machine of the state which can manufacture a pillow type bag. The enlarged front view around a hem forming unit. The enlarged side view around a hem forming unit. XX sectional drawing in FIG. The schematic diagram of turning operation | movement of a pull-down belt.

Explanation of symbols

1 Bag making and packaging machine 14 Conveyance mechanism (conveyance unit)
15 Vertical seal mechanism (seal part)
17 Horizontal seal mechanism (seal part)
31 Tube (cylindrical part)
31a Side surface (surrounding surface)
32 former (molding part)
33a Substrate (base)
50 Hem seal type bags 51a to 51d Hem portion 54 Side surface 72 Roller 72a Peripheral surface 72b Side surface 72c Rotating shaft 73 Roller plate (side facing portion)
73a First surface (side facing surface)
80, 81 hem seal unit (seal part)
82 Heater Block F Film (Packaging)
Fc square tube film

Claims (8)

A bag making and packaging machine for manufacturing a bag having a side part from a packaging material and a hem part protruding from the side part,
A roller having a peripheral surface and a side surface;
A side facing portion having a side facing surface facing the side surface;
A transport unit that transports the packaging material in such a manner that the first portion of the packaging material is sandwiched between the side surface and the side surface facing surface;
A seal unit that seals a predetermined position of the packaging material conveyed by the conveyance unit;
With
The first portion is molded into the shape of the hem portion by passing between the side surface and the side surface facing the side surface.
Bag making and packaging machine. A cylindrical portion having a peripheral surface facing the peripheral surface;
Further comprising
The conveyance unit is an aspect in which an inner surface of the cylindrical packaging material is along an outer surface of the cylindrical portion, and the vicinity of the first portion of the packaging material is the peripheral surface and the peripheral surface. Transporting the packaging material in such a manner as to be sandwiched between the opposing surfaces;
The bag making and packaging machine according to claim 1. The roller has a rotating shaft extending in a direction perpendicular to the conveying direction of the packaging material, and the peripheral surface rotates around the rotating shaft by contacting the packaging material conveyed by the conveying unit.
The bag making and packaging machine according to claim 1 or 2. A molding part that is arranged upstream of the cylindrical part in the conveying direction of the packaging material, is fixed to the cylindrical part, and molds the packaging material from a sheet shape into a cylindrical shape together with the cylindrical part;
A base for fixedly supporting the molded part;
Further comprising
The roller is fixed to the base,
The bag making and packaging machine according to claim 2. The seal portion has a hem heater member,
The heater member for hem is disposed downstream of the roller and the side facing portion in the conveying direction of the packaging material, and heats the first portion formed in the shape of the hem portion.
The bag making and packaging machine according to any one of claims 1 to 4. The radius of the roller is longer than the width in the protruding direction of the hem portion protruding from the side surface portion,
The bag making and packaging machine according to any one of claims 1 to 5. The roller has a rotation shaft extending in a direction perpendicular to the conveying direction of the packaging material,
The difference between the radius of the roller and the radius of the rotating shaft is longer than the width of the hem portion protruding from the side surface portion,
The bag making and packaging machine according to claim 1, 2 or 4. A bag making and packaging machine for manufacturing a bag having a side part from a packaging material, a first hem part protruding from the left end of the side part, and a second hem part protruding from the right end of the side part,
A first roller having a first circumferential surface and a first side surface;
A second roller having a second peripheral surface and a second side surface;
A first side surface facing portion having a first side surface facing the first side surface;
A second side surface facing portion having a second side surface facing the second side surface;
The first portion of the packaging material is sandwiched between the first side surface and the first side surface facing surface, and the second portion of the packaging material is between the second side surface and the second side surface facing surface. A transport unit for transporting the packaging material in such a manner as to be sandwiched between
A seal unit that seals a predetermined position of the packaging material conveyed by the conveyance unit;
With
The first portion is molded into the shape of the first hem portion by passing between the first side surface and the first side surface.
The second portion is formed into the shape of the second hem portion by passing between the second side surface and the second side surface.
Bag making and packaging machine.

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