JP4857030B2 - Bag making and packaging machine - Google Patents

Description

The present invention relates to a bag making and packaging machine that manufactures a packaged product by filling an article while forming a cylindrical packaging material into a bag having folding portions on both sides, and belongs to the technical field of article packaging.

  In general, a bag making and packaging machine that continuously manufactures products such as snack confectionery wrapped in a bag with plastic film or the like is wrapped around a tube around a tube and bent into a tubular shape. In the bag making process, for example, it is supplied from a combination weighing device, etc., and is sequentially put into the tube while the superposition part is vertically sealed in the longitudinal direction while being conveyed, and then laterally sealed and cut in the width direction to form a bag. The articles to be processed are filled into individual bags.

  In that case, as shown in FIG. 12, the upper and lower horizontal seal portions (hereinafter referred to as top seal rib and bottom seal rib) S1 provided on the bag X for the purpose of imparting a high-class feeling to the manufactured bag. , S2 may be formed with inwardly folded portions (gussets) G1 and G2, and the bottom seal rib S2 may be folded at the bottom.

As a bag making and packaging machine for manufacturing such a bag X, for example, there is one disclosed in Patent Document 1. As shown in FIG. 13, this bag making and packaging machine includes a pair of contact jaws A and A that can be separated from each other by sandwiching a cylindrical packaging material F from both sides, and a bottom of the seal jaws A and A. A pair of upper folding members B1 and B1 (shown only on the front side) B1 and B1 which are arranged on the side and form the upper folding parts G1 and G1 and the upper side of the sealing jaws A and A. A pair of bottom folding members B2 and B2 that form the bottom folding portions G2 and G2 and can be moved close to and away from each other, and the bottom sealing rib S2 is moved forward and backward just above one of the sealing jaws A. And a rib folding member B3 to be folded into the rib. In that case, the upper folding member B1 has a plate shape extending in the vertical direction, the bottom folding member B2 has a plate shape extending in the horizontal direction of the plan view triangle, and the rib folding member B3 has a plate shape extending in the horizontal direction. , Each is configured.

  First, when the pair of upper folding members B1 and B1 and the pair of bottom folding members B2 and B2 come close to each other, both upper and lower sides of the cylindrical packaging material F are folded inward. Next, when the pair of sealing jaws A and A are in contact with each other with the cylindrical packaging material F interposed therebetween, the cylindrical packaging material F is laterally sealed, and the approximate center of the lateral seal portion is cut in the width direction by a cutter (not shown). The

  Then, as shown in FIG. 14, when the upper and bottom folding members B1, B1, B2, B2 and the seal jaws A, A are separated from each other, the folded portions are shown on the upper and lower sides (only the front side is shown). A bag X in which G1, G1, G2, G2 are formed and a top seal rib S1 and a bottom seal rib S2 are respectively formed on the upper and lower sides is obtained. G), G2, and by extension, the bottom is formed, and the cylindrical packaging material F in which the bottom seal rib S2 is formed is obtained. The bottom seal rib S2 of the bag X has already been folded into the bottom by the previous bag making cycle.

  Then, as shown in FIG. 15, after the rib folding member B3 has advanced just past one of the seal jaws A and folded the bottom seal rib S2 of the tubular packaging material F into the bottom, FIG. Retreat to the home position shown in FIG. By repeating such an operation, the bag X having the configuration shown in FIG. 12 is continuously manufactured.

Japanese Patent No. 3179029

  By the way, in the said bag making packaging machine, as shown in FIG.14 and FIG.15, when the rib folding member B3 folds the bottom seal rib S2 in a bottom part, since the lower part of the cylindrical packaging material F is a released state, it is a shape. Is unstable. For example, as shown by an arrow y and a two-dot chain line in FIG. 15, if the lower portion bends downward and the rib folding member B3 advances in this state, the lower portion may be damaged. In that case, the bag X whose lower part is damaged is obtained by the next bag-making cycle.

  Then, this invention makes it a subject to manufacture, without damaging the bag by which the bottom part was formed and the bottom seal rib was folded in this bottom part in a bag making packaging machine.

  In order to solve the above problems, the present invention is configured as follows.

First, the when an invention according to claim 1, to form a Taise' away possible pair of sealing jaws for transverse sealing of the tubular packaging material in the width direction, the tubular packaging material by the sealing jaws in a bag shape moving bottom of the bag and a pair of bottom folding members capable close to and away from forming flat, rib folding member folding the bottom seal ribs formed by the sealing jaws on the bottom of the bag, the rib folding member in a horizontal plane The rib folding member is connected to one seal jaw so as to be able to advance and retreat in a direction perpendicular to the contact and separation direction of the seal jaw. contact with the case that, said driving means is driven, at least the tip portion of the rib folding member, to enter from a direction perpendicular to the abutment separating direction of the sealing jaws just below the bottom, said sealing When ® chromatography is away, hold at least the tip portion of the rib folding members were entered just below the bottom, to so that is moved in the separating direction of the sealing jaws together with the one of the sealing jaws the rib folding member The control means for controlling the driving means is provided.

The invention according to claim 2 is characterized in that, in the bag making and packaging machine according to claim 1 , the rib folding member is provided in a pair with a cylindrical packaging material interposed therebetween.

The invention according to claim 3 is the bag making and packaging machine according to claim 1 or 2 , wherein the rib folding member is connected to the seal jaw so that heat of the seal jaw is transmitted. It is characterized by being.

The invention according to claim 4 is characterized in that, in the bag making and packaging machine according to any one of claims 1 to 3 , the rib folding member is adjustable in moving stroke. To do.

The invention according to claim 5 is characterized in that, in the bag making and packaging machine according to any one of claims 1 to 4 , the rib folding member is detachable.

First, according to the first aspect of the present invention, in a bag making and packaging machine for manufacturing a bag having a bottom portion and a bottom seal rib folded into the bottom portion, the sealing jaws are brought into contact with each other to form the cylindrical packaging material. When sandwiched, at least the tip of the rib folding member is allowed to enter directly below the bottom formed by the bottom folding member, but the lower part of the cylindrical packaging material in that case is supported by the sealing jaw in the contact state The shape is stable. Therefore, when the rib folding member moves as described above, the lower part of the cylindrical packaging material and thus the lower part of the bag is not damaged. In addition, when the seal jaws are separated, the rib folding member moves in the separation direction of the seal jaws, whereby the bottom seal rib can be folded into the bottom portion.

Further , according to the present invention, since the rib folding member is connected to the seal jaw, the movement of the rib folding member in the same direction as the contact / separation direction of the seal jaw uses a driving means for moving the seal jaw. There are benefits to be realized.

Further, according to the invention described in claim 2 , since the rib folding member is provided in a pair, the movement stroke during the forward / backward movement is half as compared with the case of one, and the movement time is shortened or the installation space is reduced. Compactness can be achieved.

According to the invention described in claim 3 , since the rib folding member is heated, the bottom seal rib is rapidly cooled even if it contacts the still hot bottom seal rib after the horizontal seal during folding. There is no. Therefore, the bottom seal rib is cooled and hardened after being folded into the bottom, and a folded state with a good appearance is realized.

In that case , since the rib folding member is connected to the sealing jaw so that the heat of the sealing jaw is transmitted, it is not necessary to add a special heating means, and the number of parts can be reduced.

Further, according to the invention described in claim 4, the rib folding members since movement stroke is adjustable, it is possible to easily cope with change of the bag size to be produced, whereas, according to claim 5 According to the invention, since the rib folding member is detachable, for example, the cleaning property can be improved.

Hereinafter, a bag making and packaging machine according to an embodiment of the present invention will be described .

  A bag making and packaging machine 1 shown in FIG. 1 is of a vertical type, and includes a tube 11 into which an article such as snack confectioner weighed to a predetermined weight by a combination weighing device directly above (not shown) and a roll support (not shown). And a former 12 which is formed in a cylindrical shape by overlapping the left and right edges of the belt-like packaging material F fed out from the portion. Also, a pair of pull-down belts 13 and 13 that convey the tubular packaging material F downward while pressing the tubular packaging material F against the tube 11 from both the left and right sides, and placed on the front surface of the tube 11 to seal the overlapping portion of the tubular packaging material F in the longitudinal direction. And a horizontal sealing device 15 that sandwiches the cylindrical packaging material F from both the front and rear sides and seals it in the width direction and cuts the seal portion in the width direction.

  The lateral sealing device 15 which is a characteristic part of the present invention includes a pair of front and rear sealing jaws (front side) that seals the cylindrical packaging material F in the width direction and cuts substantially the center of the sealing portion in the width direction by a built-in cutter (not shown). (Only shown) 21, 21, and a pair of left and right upper folding members 22, 22 and a bottom folding member 23 which are disposed below and above the sealing jaws 21, 21 to form an upper folding portion and a bottom folding portion in the bag, 23, and a pair of left and right rib folding members 24, 24 that are disposed directly above the sealing jaws 21, 21 and fold the bottom sealing rib formed by the sealing jaws 21, 21 in the horizontal direction. As shown in FIG. 12, inwardly folded portions (gussets) G1 and G2 are formed on both side portions in the vicinity of the upper and lower top seal ribs S1 and bottom seal rib S2, and the bottom sheet Ribs S2 is adapted to bags X that folded at the bottom is obtained.

  The horizontal seal device 15 will be described in more detail. As shown in FIG. 2, the horizontal seal device 15 includes a frame 31 extending in the front-rear direction and a connecting plate extending in the left-right direction spanning a substantially central portion of the frame 31. 32, a pair of left and right support rods 33, 33 extending in the front-rear direction along the frame 31, and front and rear base members 34 that span the support rods 33, 33 and support the seal jaws 21, 21. 35 and a connecting member 36 for connecting the support rods 33, 33 at the rear end. Further, the support rods 33 are slidably supported by the frame 31 via guides 37... The rear base member 35 is slidably supported by the support rods 33 and 33 via a pair of left and right sleeves 38 and 38 slidably fitted to the support rods 33 and 33.

  The upper end portion of the spline shaft 39 protrudes from the upper surface of the connecting plate 32, and the crank member 40 is spline fitted to the upper end portion. Further, a first link member 41 for moving the front seal jaw 21 between one rotating end of the crank member 40 and the rear connecting member 36 includes the other rotating end and the front rear side. A second link member 42 for moving the rear seal jaw 21 is provided between the base member 35 and the base member 35. The lower end portion of the spline shaft 39 is attached to the output shaft of the servo motor 43 through a gear box (not shown).

  As a result, when the crank member 40 is rotated in the direction of arrow a from the state shown in the figure by driving the servo motor 43, the first link member 41 pushes the connecting member 36 in the direction of arrow b, so that it is connected to the connecting member 36. The front base member 34, that is, the front seal jaw 21, moves in the direction of the arrow b through the support rods 33, 33. The second link member 42 pushes the rear base member 35, that is, the rear seal jaw 21 in the direction of the arrow b '. As a result, the front and rear sealing jaws 21 and 21 come into contact with each other with the tubular packaging material F interposed therebetween. Next, when the crank member 40 rotates in the direction of the arrow a ′, the connecting member 36 moves in the direction of the arrow b ′, and the rear base member 35 moves in the direction of the arrow b. It comes away from the material F.

  As shown in FIGS. 2 to 4, L-shaped support members 51... 51 are fixed to the upper and lower ends of each inner surface on the front end side of the frame 31. As an example, the right side portion will be described. The upper and lower support members 51, 51 are provided with guide rods 52, 52 extending outward, respectively, and end portions of the pair of upper and lower guide rods 52, 52. A fixed connecting member 53 is bridged between them. Then, between the support members 51, 51 and the fixed connection member 53, a slide connection member 54 having a substantially inverted U shape in side view is slidable on the pair of guide rods 52, 52 via the sleeves 55, 55. It is supported.

  A pair of upper and lower arm members 56 and 57 extend inwardly from the sliding connection member 54, and the upper folding member 22 positioned below the seal jaw 21 is located at the upper end of the lower arm member 56. The bottom folding member 23 located above the sealing jaw 21 is attached to the tip of the arm member 57. In this case, the upper folding member 22 is configured in a plate shape extending in the vertical direction, and the bottom folding member 23 is configured in a plate shape extending in the horizontal direction in a plan view home base shape with the front end portion being triangular.

  L-shaped brackets 58 and 58 extending in the front-rear direction are respectively fixed to the upper and lower ends of the sliding connection member 54, and the arm members 56 and 57, that is, the upper part and the upper part are provided substantially at the center of each bracket 58. An operation lever 59 that is operated when the bottom folding members 22 and 23 are attached and detached is provided. That is, when the operation lever 59 is loosened, the arm members 56 and 57 in the sliding connection member 54 can be released. Since the above-described configuration is the same for the left side portion, description thereof is omitted.

  Struts 61, 61 are erected in the vicinity of the left and right ends of the connecting member 36, and an air cylinder 62 having a connecting rod 62a extending substantially forward is swingably attached to the upper end of each strut 61. . Further, support blocks 64 and 64 that rotatably support the support shafts 63 and 63 are fixed to both side portions on the front end side of the frame 31.

  As an example, the right part will be described. A lever member 65 having an L-shape in plan view composed of first and second members 65 a and 65 b is fixed to the upper end portion of the support shaft 63 protruding from the support block 64. Further, the swinging end of the first member 65a is coupled to the tip of the connecting rod 62a, and a long hole 65b 'is provided in the swinging end of the second member 65b. A cam follower 66 is rotatably supported in the vicinity of the rear end portion of the upper bracket 58, and the cam follower 66 is fitted in the elongated hole 65b 'so as to roll freely.

  On the other hand, a second member 65b is fixed to the lower end portion of the support shaft 63 protruding from the support block 64, and an elongated hole 65b 'is provided at the swinging end portion of the second member 65b. A cam follower 66 is rotatably supported in the vicinity of the rear end portion of the lower bracket 58, and the cam follower 66 is rotatably fitted in the elongated hole 65b '. Since the above-described configuration is the same for the left side portion, description thereof is omitted.

  Thus, when the connecting member 36 is moved in the direction of the arrow b from the state shown in the figure by driving the servo motor 43, the left lever member 65 is connected to each other through the cylinder 62 and the connecting rod 62a provided upright on the connecting member 36. Oscillates integrally with the support shaft 63 in the direction of arrow c, and the right lever member 65 swings together with the support shaft 63 in the direction of arrow c ′. As a result, the brackets 58 and 58 and the respective sliding connecting members 54 are moved along the guide rods 52 and 52 through the fitting between the upper and lower elongated holes 65b 'and 65b' and the cam followers 66 and 66. 54 slides in the direction of the arrow d, and the right sliding connecting member 54 slides in the direction of the arrow d ′, and the upper folding member 22 and the bottom folding members 23 and 23 connected to the left sliding coupling member 54 and the right sliding. The upper folding member 22 and the bottom folding member 23 connected to the dynamic coupling member 54 are close to each other.

  Next, when the connecting member 36 moves in the direction of the arrow b ′, the left lever member 65 swings in the direction of the arrow c ′ together with the support shaft 63, and the right lever member 65 swings in the direction of the arrow c together with the support shaft 63. As a result, contrary to the above, the left sliding connecting member 54 slides in the direction of the arrow d ′, and the right sliding connecting member 54 slides in the direction of the arrow d. The member 23 is separated from the upper folding member 22 and the bottom folding member 23 on the right side.

  Further, when the output rod of the left air cylinder 62 extends in the direction of arrow e from the state shown in the figure, the lever member 65 swings integrally with the support shaft 63 in the direction of arrow c ′, so the upper folding member 22 and the bottom folding member 23 moves in the direction of arrow d ', and when the output rod of the right air cylinder 62 extends in the direction of arrow e from the state shown in the figure, the lever member 65 swings integrally with the support shaft 63 in the direction of arrow c. The upper folding member 22 and the bottom folding member 23 move in the arrow d direction. As a result, the left upper folding member 22 and the bottom folding member 23 are separated from the right upper folding member 22 and the bottom folding member 23.

  Next, when the output rod of the left air cylinder 62 is contracted in the direction of arrow e ′, the lever member 65 swings integrally with the support shaft 63 in the direction of arrow c, and the output rod of the right air cylinder 62 is similarly moved in the direction of arrow e ′. When the length of the lever member 65 is reduced, the lever member 65 swings integrally with the support shaft 63 in the direction of the arrow c '. Therefore, the left upper folding member 22 and the bottom folding member 23 and the right upper folding member 22 are reversed. And the bottom folding member 23 are close to each other.

  As shown in FIGS. 2 and 5, air cylinders 72 and 72 are attached to the left and right ends of the front base member 34 via attachment members 71 and 71, respectively. A bracket 73 is detachably provided at the tip of the output rod extending and contracting in the directions of arrows f and f ′ of each air cylinder 72, and the rib folding member 24 is attached to the bracket 73. In that case, each rib folding member 24 includes a front piece 24a near the front base member 34, a rear piece 24b in a positional relationship facing the front piece 24a, and a connecting piece 24c that connects these at the outer end. And has a U-shape in plan view. Further, the front side piece 24a portion of the rib folding member 24 is located immediately above the front side seal jaw 21 at the time of separation in the illustrated example and at the time of proximity as will be described later. 24a is transmitted to the rear piece 24b through the connecting piece 24c.

  Next, a control system of the bag making and packaging machine 1 will be described.

  As shown in FIG. 6, a control unit 80 for comprehensively controlling the bag making and packaging machine 1 is provided. The control unit 80 outputs control signals to the pull-down belts 13 and 13 and the vertical seal device 14. In addition, the control unit 80 brings the pair of sealing jaws 21 and 21 provided in the lateral sealing device 15 in contact with each other and separates the pair of upper and bottom folding members 22, 22, 23, and 23 from each other. A control signal is output to the pair of air cylinders 72, 72 that bring the pair of air cylinders 62, 62 and the pair of rib folding members 24, 24 close to and away from each other.

  Here, operation | movement of this bag making packaging machine 1 is demonstrated.

  That is, the belt-like packaging material F fed out from the roll support part is conveyed downward by the pull-down belts 13 and 13 while being formed into a cylindrical shape by the tube 11 and the former 12, and the cylindrical packaging material F by the vertical sealing device 14. The overlapping portion is sealed in the longitudinal direction. When an article weighed to a predetermined weight from the combination weighing device immediately above is put into the cylindrical packaging material F having the bottom formed through the tube 11, it is sealed in the width direction by the horizontal sealing device 15. And the bag X filled with the lower article and the cylindrical packaging material F formed with the upper bottom are obtained.

  The operations of the sealing jaws 21 and 21, the upper folding members 22 and 22, the bottom folding members 23 and 23, and the rib folding members 24 and 24 in the horizontal sealing device 15 in that case will be described in detail.

  First, as shown in FIG. 7, the seal jaws 21 and 21, the upper folding members 22 and 22, the bottom folding members 23 and 23, and the rib folding members 24 and 24 are positioned at their home positions. That is, FIG. 7 has a positional relationship corresponding to FIG. 2, and the pair of sealing jaws 21 and 21 are separated from each other with the tubular packaging material F interposed therebetween. The pair of upper and bottom folding members 22, 22, 23, 23 are separated from each other with the tubular packaging material F in between. The pair of rib folding members 24, 24 are located at the same position as the front seal jaw 21 and are separated from each other to the left and right.

  Next, when the servo motor 43 is driven and the crank member 40 rotates in the direction of arrow a, the front seal jaw 21 moves in the direction of arrow b and the rear seal jaw 21 moves in the direction of arrow b ′ as shown in FIG. Then, the cylindrical packaging material F is sandwiched and the side seal is started. Further, the rotation of the crank member 40 is transmitted to the pair of left and right sliding connecting members 54 and 54 and thus to the pair of upper and bottom folding members 22, 22, 23 and 23 through a pair of left and right air cylinders 62 and 62. The left upper and bottom folding members 22 and 23 move in the direction of the arrow d, and the right upper and bottom folding members 22 and 23 move in the direction of the arrow d ′ to approach each other and start the folding operation. On the other hand, the pair of left and right rib folding members 24, 24 connected to the front seal jaw 21 via the front base member 34 moves integrally with the seal jaw 21 in the direction of arrow b.

  Next, as shown in FIG. 9, the pair of left and right air cylinders 72, 72 are brought into contact with the pair of sealing jaws 21, 21, and with the pair of upper and bottom folding members 22, 22, 23, 23 in proximity to each other. When the output rod is driven to extend, the left rib folding member 24 moves in the arrow f direction, and the right rib folding member 24 moves in the arrow f ′ direction. That is, the front side pieces 24a, 24a and the rear side pieces 24b, 24b of the rib folding members 24, 24 are located immediately below the cylindrical packaging material F formed at the bottom by the bottom folding members 23, 23, and the front side pieces 24a. 24a and the rear pieces 24b, 24b enter so as to face each other with the bottom seal rib S2 interposed therebetween.

  Next, when the pair of air cylinders 62, 62 are driven and the output rod extends in the direction of the arrow e for a predetermined stroke, the left upper and bottom folding members 22, 23 are moved in the direction of the arrow d 'as shown in FIG. The right upper and bottom folding members 22, 23 are separated by a predetermined distance in the direction of the arrow d, and the folding operation is completed. The seal jaws 21 and 21 and the rib folding members 24 and 24 are immovable. In that case, when the upper and bottom folding members 22, 22, 23, 23 are separated from each other, the lower part of the cylindrical packaging material F is supported by the sealing jaws 21, 21 and the rib folding members 24, 24 so that the shape is stable. Therefore, these folding members 22, 22, 23, and 23 are not damaged by hooking the lower portion of the cylindrical packaging material F.

  Next, when the servo motor 43 is driven and the crank member 40 rotates in the direction of arrow a ′, as shown in FIG. 11, the front seal jaw 21 is in the direction of arrow b ′ and the rear seal jaw 21 is in the direction of arrow b. Move away and finish the side seal. Further, the rotation of the crank member 40 is transmitted to the pair of left and right sliding connecting members 54 and 54 and thus to the pair of upper and bottom folding members 22, 22, 23 and 23 through a pair of left and right air cylinders 62 and 62. The left upper and bottom folding members 22, 23 move in the direction of the arrow d ', and the right upper and bottom folding members 22, 23 move in the direction of the arrow d and further move away. In this case, the pair of rib folding members 24 and 24 are moved in the direction of the arrow b ′ in conjunction with the front seal jaw 21 while being in the close state, and at this time, the lateral seals of the current time are sealed by the rear pieces 24b and 24b. The bottom seal rib S2 of the cylindrical packaging material F formed in the above is folded at the bottom.

  Note that, in the conventional rib folding member (see FIGS. 14 and 15) that reciprocates during folding, the bottom seal rib S2 folded in the past may be rubbed at the time of return, but the rib folding member 24, Since 24 does not reciprocate when folded, the above-mentioned concern does not occur.

  Then, when the folding of the bottom seal rib S2 is finished, the pair of air cylinders 62, 62 are driven and the output rod is contracted in the direction of the arrow e 'by a predetermined stroke, so that each pair of upper and bottom folding members 22, 22, 23 and 23 return to the home position shown in FIG. 7 a little closer to the position shown in FIG. Further, when the pair of air cylinders 72 and 72 are driven and the output rod contracts in the directions of the arrows f and f ', the pair of rib folding members 24 and 24 are separated from the positions shown in FIG. Return to the indicated home position.

With the above configuration, first, in the bag making and packaging machine 1 for manufacturing the bag X in which the bottom portion is formed and the bottom seal rib S2 is folded into the bottom portion, the seal jaws 21 and 21 come into contact with each other to form a cylinder. When the wrapping material F is sandwiched, the rear pieces 24b, 24b of the rib folding members 24, 24 are caused to enter directly below the bottom formed by the bottom folding members 23, 23. The lower part of the packaging material F is supported by the sealing jaws 21 and 21 in a contact state, and the shape is stable. Therefore, when the rib folding members 24, 24 are moved as described above, the lower part of the cylindrical packaging material F and the lower part of the bag X are not damaged. In addition, when the seal jaws 21 and 21 are separated, the rib folding members 24 and 24 are moved in the separation direction of the seal jaws, whereby the bottom seal rib S2 can be folded into the bottom portion.

  Next, since the rib folding members 24 and 24 are connected to the seal jaw 21, the movement of the rib folding members 24 and 24 in the same direction as the contact and separation directions b and b 'of the seal jaws 21 and 21 is the sealing jaw. There is a merit realized by using a servo motor 43 that moves 21 and 21.

  Further, since the rib folding members 24, 24 are U-shaped in plan view, the lower part of the cylindrical member F is defined by the front pieces 24a, 24a and the rear pieces 24b, 24b facing each other with the bottom seal rib S2 interposed therebetween. In this state, the rib folding members 24 and 24 start the folding operation of the bottom seal rib S2 into the bottom portion, so that the lower portion of the tubular packaging material F and the lower portion of the bag X are damaged. Is definitely prevented.

  Further, since the rib folding members 24, 24 are provided in a pair, the movement stroke during the advance / retreat operation is half as compared with a single case, and the movement time can be shortened or the installation space can be made compact.

  Further, since the rib folding members 24 and 24 are heated when the heat of the sealing jaw 21 is transmitted, even if the rib folding members 24 and 24 come into contact with the still hot bottom seal rib S2 after lateral sealing, the bottom seal rib S2 is suddenly moved. Never cool down. Therefore, the bottom seal rib S2 is cooled and hardened after being folded into the bottom, and a folded state with a good appearance is realized.

  Moreover, since the rib folding members 24 and 24 are connected to the sealing jaw 21 so that the heat of the sealing jaw 21 is transmitted, it is not necessary to add a special heating means, and the number of parts can be reduced. Can do.

  And since the rib folding members 24 and 24 are controlled to move by the air cylinders 72 and 72 and the moving stroke is adjustable, it is possible to easily cope with the change of the bag size to be manufactured, Since the rib folding members 24 and 24 can be attached to and detached from the air cylinders 72 and 72, for example, the cleaning property can be improved.

  By the way, the upper folding members 22 and 22 and the bottom folding members 23 and 23 can also adjust the proximity distance and the separation distance by adjusting the rotation amount of the servo motor 43 and the moving stroke of the air cylinders 62 and 62. Similarly, it is possible to easily cope with a change in the size of the bag to be manufactured, and it can be attached to and detached from the sliding connection members 54 and 54 by operating the operation levers 59 and 59, so that the cleaning property is also improved. Can do.

  It should be noted that the present invention is not limited to the above-described embodiment that has been specifically described in detail, and may be any that are within the spirit of the present invention.

  For example, in the above-described embodiment, the rib folding members 24 and 24 are configured to be heated by transmitting heat from the seal jaw 21, but in the case of a configuration that does not use the heat of the seal jaw 21, As additionally shown by a two-dot chain line in FIG. 7, heating sheets 81 and 81 may be attached and heated. In addition, it is also possible to apply a heater or apply thermal grease.

  As described above, according to the present invention, in a bag making and packaging machine, a bag in which a bottom portion is formed and a bottom seal rib is folded into the bottom portion can be manufactured without being damaged. That is, the present invention is widely suitable for the technical field of article packaging.

It is a schematic front view of the bag making packaging machine which concerns on embodiment of this invention. It is a top view of a horizontal sealing apparatus. It is an enlarged arrow line view by the II-II line | wire of FIG. 2, Comprising: The principal part is extracted and shown. It is an enlarged arrow line view by the III-III line of FIG. 2, Comprising: The principal part is extracted and shown. It is an enlarged arrow line view by the IV-IV line of FIG. 2, Comprising: The principal part is extracted and shown. It is a block diagram which shows a control system. It is the figure which extracted the principal part for demonstrating operation | movement of a horizontal sealing apparatus, Comprising: (a) is a top view, (b) is a front view. It is the figure which extracted the principal part similarly. It is the figure which extracted the principal part similarly. It is the figure which extracted the principal part similarly. It is the figure which extracted the principal part similarly. It is a perspective view of the bag which has a folding part. It is a side view for demonstrating operation | movement of the conventional bag making packaging machine. It is a side view similarly. It is a side view similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag making packaging machine 21 Seal jaw 23 Bottom part folding member 24 Rib folding member 24b Rear side piece (tip part)
43 Servo motor (drive means)
72 Air cylinder (drive means)
80 Control unit (control means)
81 Heating sheet (heating means)
F Cylindrical packaging material S2 Bottom seal rib X Bag

Claims (5)

A pair of seal jaws that can be separated from each other in the width direction to seal the cylindrical packaging material, and the bottom of the bag can be formed flat when the cylindrical packaging material is formed into a bag shape by the sealing jaw. A bag making and packaging machine having a pair of bottom folding members, a rib folding member for folding a bottom seal rib formed by the sealing jaw into the bottom of the bag , and a driving means for moving the rib folding member in a horizontal plane. There,
The rib folding member is connected to one seal jaw so as to be able to advance and retreat in a direction perpendicular to the contact / separation direction of the seal jaw,
When the seal jaws are in contact with each other, the drive means is driven to cause at least the tip of the rib folding member to enter directly below the bottom from a direction perpendicular to the contact and separation direction of the seal jaws. When the seal jaws are separated, the rib folding member is moved in the separation direction of the seal jaw together with the one sealing jaw while at least the tip portion of the rib folding member is inserted just below the bottom portion. As described above, the bag making and packaging machine is provided with control means for controlling the driving means. In the bag making and packaging machine according to claim 1,
A pair of rib folding members are provided across a cylindrical packaging material . In the bag making and packaging machine according to claim 1 or 2,
The said bag folding member is connected with this sealing jaw so that the heat | fever of the said sealing jaw may be transmitted , The bag making packaging machine characterized by the above-mentioned. In the bag making and packaging machine according to any one of claims 1 to 3,
The rib folding member has a movable stroke that can be adjusted . In the bag making and packaging machine according to any one of claims 1 to 4 ,
The rib folding member is detachable from the bag making and packaging machine.

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