JP2009280255A - Bag manufacturing and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag manufacturing and packaging machine capable of avoiding collision at a high speed of a horizontal seal auxiliary member, and well performing bag manufacturing. <P>SOLUTION: The bag manufacturing and packaging machine which forms a cylindrical packaging material while the packaging material is conveyed, and fills an article to be packaged into the cylindrical packaging material, is equipped with a pair of horizontal sealing members coming into contact with the cylindrical packaging material from both sides of the cylindrical packaging material to seal the cylindrical packaging material, a pair of horizontal sealing auxiliary members positioned upstream or downstream of a pair of the horizontal sealing members in the conveying direction, and earlier coming into contact with the cylindrical packaging material than a pair of the horizontal sealing members to suppress biting the article to be packaged to a part to be sealed of the cylindrical packaging material, a cam having a cam face and enabling the horizontal movement of a pair of the horizontal sealing auxiliary members along the cam face, a cam follower coming into contact with the cam face, and a linking mechanism for linking the cam follower with a pair of the horizontal sealing auxiliary members. The cam face has such a shape that regulates the horizontal movement before a pair of the horizontal sealing auxiliary members come into contact with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bag making and packaging machine.

  2. Description of the Related Art Conventionally, there is a vertical bag making and packaging machine as an apparatus for filling a bag with wrapping articles such as potato chips while packaging the packaging material into a bag. For example, a vertical bag making and packaging machine is formed into a cylindrical shape by a former and a tube while conveying a packaging material that is a sheet-like film, and a vertical edge on which the cylindrical packaging material is stacked is along the conveyance direction. And seal (vertical seal) to form a cylindrical packaging material. In addition, the cylindrical packaging material is formed into a bag by a pair of horizontal sealing members that seal (transverse seal) the cylindrical packaging material in a direction orthogonal to the conveyance direction upstream and downstream in the conveyance direction. In this way, when performing a horizontal seal with a pair of horizontal seal members, a pair of horizontal seal auxiliary members upstream and / or downstream in the transport direction from the horizontal seal member so that an article to be packaged does not enter the sealed portion of the packaging material. Is provided. The pair of lateral seal auxiliary members abut on the cylindrical packaging material earlier than the lateral seal member, thereby restricting the entry of the packaged object at the sealed location.

By the way, such a pair of lateral seal auxiliary members collide with each other, thereby blocking the packaged object existing in the vicinity of the sealed part from the upstream and / or downstream in the transport direction, and biting the packaged object in the sealed part. Such a design is used as to prevent intrusion (see, for example, Patent Document 1).
JP-A-8-175523

  However, in such a bag making and packaging machine, the side seal auxiliary member collides at a high speed as the operating speed of the bag making and packaging machine increases, so that the collision noise increases.

  The subject of this invention is providing the bag making packaging machine which can avoid the collision at a high speed of a horizontal seal auxiliary member, and can perform bag making favorably.

  A bag-making packaging machine according to a first aspect of the present invention is a bag-making packaging machine that forms a cylindrical packaging material while conveying the packaging material, and fills the cylindrical packaging material with an article to be packaged. A pair of lateral seal auxiliary members, a cam, a cam follower, and a link mechanism. The pair of lateral seal members abut against the cylindrical packaging material from both sides of the cylindrical packaging material to seal the cylindrical packaging material. The pair of horizontal seal auxiliary members are positioned upstream or downstream in the transport direction with respect to the pair of horizontal seal members, and come into contact with the cylindrical packaging material earlier than the pair of horizontal seal members, thereby Suppresses the bite of the packaged item in the sealed part. The cam has a cam surface and enables a pair of horizontal seal auxiliary members to move horizontally along the cam surface. The cam follower contacts the cam surface. The link mechanism connects the cam follower and the pair of lateral seal auxiliary members. Further, the cam surface is shaped such that the horizontal movement is restricted before the pair of lateral seal auxiliary members come into contact with each other.

  In the bag making and packaging machine according to the present invention, the horizontal movement of the pair of horizontal seal auxiliary members is restricted before the pair of horizontal seal auxiliary members contact each other.

  Thereby, the collision at a high speed of the lateral seal auxiliary member can be avoided.

  The bag making and packaging machine of the second invention is the bag making and packaging machine according to the first invention, wherein the cam has a regulating surface and a non-regulating surface. The restricting surface is a cam surface that restricts horizontal movement of the pair of lateral seal auxiliary members. The non-regulating surface is a cam surface that does not restrict the horizontal movement of the pair of lateral seal auxiliary members.

  In the bag making and packaging machine according to the present invention, the horizontal movement of the pair of lateral seal auxiliary members is restricted on the cam restriction surface, and the horizontal movement is not restricted on the non-regulation surface.

  Thereby, a motion of a pair of horizontal seal auxiliary member can be changed.

  A bag making and packaging machine according to a third aspect of the present invention is the bag making and packaging machine according to the second aspect of the present invention, wherein the cam surface stops the horizontal movement of the pair of lateral seal auxiliary members while the cam follower moves on the regulating surface. Shape.

  In the bag making and packaging machine according to the present invention, while the cam follower is in contact with the regulating surface, the pair of lateral seal members come into contact with each other to perform lateral sealing of the cylindrical packaging material, but are arranged upstream or downstream thereof. The pair of lateral seal auxiliary members stops the horizontal movement.

  Thereby, the collision of the side seal auxiliary member can be prevented.

  A bag making and packaging machine according to a fourth invention is the bag making and packaging machine according to the second or third invention, wherein the pair of lateral seal auxiliary members are fixed to each other while the cam follower moves on the regulating surface. Keep the gap.

  In the bag making and packaging machine according to the present invention, the pair of horizontal seal members contact each other to perform horizontal sealing of the cylindrical packaging material, but the pair of horizontal seal auxiliary members disposed upstream or downstream of the pair of horizontal seal members contact each other. Keep a certain gap.

  Thereby, while being able to prevent the to-be-packaged object from biting in the sealed portion, it is possible to prevent the pair of lateral seal auxiliary members from colliding with each other.

  In the bag making and packaging machine according to the present invention, it is possible to avoid collision of the transverse seal auxiliary member at high speed.

  Next, an embodiment of a bag making and packaging machine according to the present invention will be described with reference to the drawings.

1. Overall Configuration FIGS. 1 and 2 show a bag making and packaging machine according to an embodiment of the present invention. A bag making and packaging machine 1 shown in these drawings is a machine for bagging a packaged object such as potato chips, and mainly a bag making and packaging unit 5 which is a main body part for bagging a packaged object, and the product. It is comprised from the film supply unit 6 which supplies the film F used as a bag to the bag packaging unit 5. FIG. 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 an operator who operates the operation switches 7 can visually recognize.

2. Configuration of Each Unit The film supply unit 6 is a unit that supplies a sheet-like film F to a 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 here. ing. A 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 roll.

  As shown in FIGS. 1 and 2, the bag making and packaging unit 5 mainly includes a forming mechanism 13 for forming a film F fed in a sheet shape into a cylindrical shape, and a cylindrical film F (hereinafter referred to as a cylinder). Pull-down belt mechanism (bag transport mechanism) 14 for transporting the film-shaped film F) downward, a vertical seal mechanism 15 for sealing (heat-sealing) the overlapping portion of the tubular film F in the vertical direction, and the tubular film It is comprised from the horizontal sealing mechanism 17 which seals the upper and lower ends of a bag by sealing F to a horizontal direction, and the support frame 12 which supports each of these mechanisms. A casing 9 is attached around the support frame 12.

  As shown in FIG. 2, the forming mechanism 13 has a tube 31 and a former 32. The tube 31 is a cylindrical member, and the upper and lower ends are open. Moreover, the tube 31 is arrange | positioned at the center opening part of the top plate 29, and is integrated with the former 32 via the bracket which is not shown in figure. An article to be packaged that is weighed from the computer scale 2 is put into the opening at the upper end of the tube 31. The former 32 is disposed 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 tube shape when passing through the gap between the former 32 and the tube 31. The former 32 is also fixed to the support frame 12 via a support member (not shown). Further, the tube 31 and the former 32 of the forming mechanism 13 can be replaced according to the size of the bag to be manufactured. Therefore, the forming mechanism 13 is detachable from the support frame 12.

  The pull-down belt mechanism 14 and the vertical seal mechanism 15 are supported by a support member suspended from the top plate 29, and are disposed so as to extend vertically along the tube 31. The pair of pull-down belt mechanisms 14 is a mechanism that conveys the cylindrical film F wound around the tube 31 while adsorbing it, and includes a driving roller, a belt having a driven roller adsorbing function, and the like. The vertical sealing mechanism 15 is a mechanism that heats and vertically seals the overlapping portion of the cylindrical film F wound around the tube 31 against the tube 31 with a constant applied pressure. The vertical seal mechanism 15 includes a heater, a heater belt that is heated by the heater and contacts an overlapping portion of the tubular film.

3. Configuration of Horizontal Seal Mechanism As shown in FIG. 2, the horizontal seal mechanism 17 is disposed below the forming mechanism 13, the pull-down belt mechanism 14, and the vertical seal mechanism 15 and is supported by the support frame 12. As shown in FIGS. 3 to 8, the horizontal seal mechanism 17 mainly includes a pair of left and right seal jaws 51 and 71, a pair of left and right ironing portions 52 and 72, a pair of left and right clam plates 53 and 73, and a seal jaw. 51, 71, ironing portions 52, 72, and a pair of support mechanisms 54, 74 that support the clam plate, cams 55, 75 disposed at both ends of the pair of support mechanisms 54, 74 in the advancing direction, The horizontal movement mechanism 20 which enables 74 horizontal movements is comprised.

  Hereinafter, the configuration of the lateral seal mechanism 17 will be described with reference to FIGS. In FIG. 3, only the clam plates 53 and 73 among the configurations supported by the support mechanisms 54 and 74 are shown.

<Support mechanism>
As shown in FIG. 3, the pair of support mechanisms 54 and 74 are disposed on both sides of the cylindrical film F to be conveyed. Further, the pair of support mechanisms 54 and 74 horizontally move in a direction in which they face each other along a horizontal movement mechanism 20 described later.

  Further, as shown in FIGS. 4 to 6, the pair of support mechanisms 54 and 74 support the crumb plates 53 and 73 and the ironing portions 52 and 72. In the support mechanisms 54 and 74, the clam plates 53 and 73 are disposed above the ironing portions 52 and 72. The ironing parts 52 and 72 and the clam plates 53 and 73 can move relative to the support mechanisms 54 and 74.

  Further, as shown in FIGS. 4 to 6, the pair of support mechanisms 54 and 74 also support the seal jaws 51 and 71 between the clam plates 53 and 73 and the ironing portions 52 and 72. The seal jaws 51 and 71 are supported so as not to move relative to the support mechanisms 54 and 74.

  The pair of support mechanisms 54 and 74 are connected to a drive mechanism (not shown) such as a motor. Accordingly, the pair of support mechanisms 54 and 74 approach or separate from the tubular film F.

<Seal Joe>
The pair of seal jaws 51 and 71 are members formed to extend longer than the width of the tubular film F in a direction perpendicular to the paper surface of FIGS. 4 to 6, and have a heater inside. The sealing surfaces of the sealing jaws 51 and 71 are heated by this heater, and a part of the tubular film F sandwiched between the sealing jaws 51 and 71 is heat-sealed. The sealing jaw 51 includes a cutter 51a. The cutter 51a separates the preceding bag B and the subsequent cylindrical film F.

  The seal jaws 51 and 71 are supported by the support mechanisms 54 and 74 as described above. Therefore, the sealing jaws 51 and 71 approach or separate from the tubular film F in accordance with the movement of the support mechanisms 54 and 74.

<Decrease>
The pair of ironing portions 52 and 72 abuts the cylindrical film F earlier than the sealing jaws 51 and 71, and an object to be packaged is caught in the sealed portion of the cylindrical film F that is heat-sealed by the sealing jaws 51 and 71. Do not.

  The ironing portions 52 and 72 mainly include ironing portion contact members 52a and 72a and ironing portion connecting members 52b and 72b. Like the sealing jaws 51 and 71, the ironing portion contact members 52a and 72a are members formed to extend longer than the width of the tubular film F in the direction perpendicular to the paper surface of FIGS. The ironing portion connecting members 52b and 72b have one end connected to the ironing portion contact members 52a and 72a and the other end supported by the support mechanisms 54 and 74.

  The operations of the ironing portions 52 and 72 are designed to be interlocked with the operations of the clam plates 53 and 73. That is, one end of the ironing portion connecting members 52b and 72b is passed through L-shaped members 53c and 73c described later. As a result, when the clam plates 53 and 73 start to move relative to the support mechanisms 54 and 74, the L-shaped members 53c and 73c pull the one end through which the ironing portion connecting members 52b and 72b are passed, and the ironing is performed. The parts 52 and 72 are moved relative to the support mechanisms 54 and 74.

  The ironing portions 52 and 72 are designed to maintain a constant gap even when they are closest to each other. In the present embodiment, the pair of ironing parts 52 and 72 have a gap of about 1 mm in a state of being closest to each other.

<Air adjustment mechanism>
As shown in FIGS. 4 to 6, the pair of air adjustment mechanisms 56 and 76 are disposed on both sides of the tubular film F. The air adjusting mechanisms 56 and 76 are fixed below the ironing portions 52 and 72 and perform horizontal movement in accordance with the horizontal movement of the ironing portions 52 and 72. FIG. 7 shows an enlarged view of the air adjustment mechanism 56. The pair of air adjusting mechanisms 56 and 76 includes a plurality of springs 56 a and spring fixing members 56 b that fix both ends of the springs to the squeezing portions 52 and 72. The plurality of springs 56a are formed to extend longer than the width of the tubular film F in a direction perpendicular to the paper surface of FIGS. The air adjusting mechanisms 56 and 76 adjust the amount of air filled in the tubular film F by adjusting the tension of the spring 56a.

<Clam plate>
The pair of clam plates 53 and 73 abut the tubular film F earlier than the sealing jaws 51 and 71, and the packaged object is caught in the sealed portion of the tubular film F that is heat-sealed by the sealing jaws 51 and 71. Intrusion of packaged goods is regulated so that there is no. The crumb plates 53 and 73 include crumb plate contact members 53a and 73a that contact the tubular film F, and crumb plate connection members 53b and 73b that connect the crumb plate contact members 53a and 73a to the support mechanisms 54 and 74, respectively. Have. The clam plate abutting members 53a and 73a are flat members that extend longer than the width of the tubular film F in the direction perpendicular to the paper surface of FIGS. The clam plate connecting members 53b and 73b are supported by the support mechanisms 54 and 74 so as to be relatively movable. In addition, in the vicinity of one end of the crumb plate connecting members 53b and 73b that is separated from the tubular film F, L-shaped members 53c and 73c that penetrate the ironing portion connecting members 52b and 72b are provided.

  The clam plates 53 and 73 are connected to link mechanisms 57 and 77 described later. Thereby, the crumb plates 53 and 73 maintain a constant gap when they are closest to each other. In the present embodiment, the pair of crumb plates 53 and 73 are designed to have a gap of about 1 mm in a state of being closest to each other.

<Link mechanism>
The link mechanisms 57 and 77 are mechanisms for connecting the cam followers 58 and 78 and the clam plates 53 and 73. That is, the movement of the cam followers 58 and 78 is transmitted to the clam plates 53 and 73 via the link mechanisms 57 and 77.

  The link mechanisms 57 and 77 are composed of a plurality of members. The plurality of members include clam plate fixing members 57a and 77a fixed to the clam plates 53 and 73, and intermediate members 57b and 77b arranged between the clam plate fixing members 57a and 77a and guide members 57c and 77c described later. And guide members 57c, 77c that are attached to the support mechanisms 54, 74 so as to be relatively rotatable and guide the other members 57a, 57b, 77a, 77b in one direction.

  The clam plate fixing members 57a and 77a are attached in the vicinity of both ends of the clam plates 53 and 73 described above. The intermediate members 57b and 77b have one end rotatably connected to the clam plate fixing members 57a and 77a, and the other end rotatably connected to the guide members 57c and 77c. Accordingly, the intermediate members 57b and 77b operate in conjunction with the operation of the guide members 57c and 77c, and the clam plate fixing members 57a and 77a operate in conjunction with the operation of the intermediate members 57b and 77b.

  The guide members 57c and 77c include center portions 57ca and 77ca connected to the support mechanisms 54 and 74, lower end portions 57cb and 77cb connected to the intermediate members 57b and 77b, and upper end portions 57cc to which the cam followers 58 and 78 are attached. 77 cc. Rotating shafts 59 and 79 are attached to the center portions 57ca and 77ca so that the link mechanisms 57 and 77 can rotate relative to the support mechanisms 54 and 74, respectively. Cam followers 58 and 78 attached to upper end portions 57cc and 77cc move along a cam surface, which will be described later.

<Cam>
The pair of cams 55 and 75 are fixed to a horizontal movement mechanism 20 described later. As shown in FIG. 8, the cams 55 and 75 are provided on the cam contact member 23 of the horizontal movement mechanism 20 and are horizontal with respect to the installation surface of the bag making and packaging machine 1 (corresponding to a non-regulating surface). ) 55a, 75a and non-horizontal planes (corresponding to regulating surfaces) 55b, 75b provided with an inclination toward a position higher than the height of the horizontal planes 55a, 75a.

  The horizontal surfaces 55a and 75a do not restrict the movement of the crumb plates 53 and 73 while the cam followers 58 and 78 move on the horizontal surfaces 55a and 75a. That is, when the support mechanisms 54 and 74 approach the tubular film F, the horizontal surfaces 55a and 75a cause the clam plates 53 and 73 to approach the tubular film F together with the support mechanisms 54 and 74, thereby supporting the support mechanisms 54 and 74. Is separated from the tubular film F, the crumb plates 53 and 73 are also separated from the tubular film F.

  On the other hand, the non-horizontal surfaces 55b and 75b regulate the movement of the crumb plates 53 and 73 while the cam followers 58 and 78 move on the non-horizontal surfaces 55b and 75b. That is, the non-horizontal surfaces 55b and 75b do not allow the clam plates 53 and 73 to approach the cylindrical film F when the support mechanisms 54 and 74 approach the cylindrical film F.

  Specifically, when the cam followers 58 and 78 are on the non-horizontal planes 55b and 75b, the rotation shafts 59 and 79 attached to the center portions 57ca and 77ca of the link mechanisms 57 and 77 rotate, and the support mechanisms 54 and 74 are horizontal. The lower ends 57cb and 77cb are swung in the direction opposite to the moving direction (see FIG. 5). Further, when the support mechanisms 54 and 74 move horizontally toward the tubular film F, the cam followers 58 and 78 further move up the non-horizontal surfaces 55b and 75b, so that the lower end portions 57cb and 77cb are supported by the support mechanisms 54 and 74. It is further shaken in the direction opposite to the direction of horizontal movement (see FIG. 6). As shown in FIGS. 5 and 6, the lower end portions 57 cb and 77 cb are swung to the side opposite to the direction in which the support mechanisms 54 and 74 move horizontally, so that the force applied to the crumb plates 53 and 73 is supported by the support mechanism. 54 and 74 are applied in the direction opposite to the traveling direction. As a result, the clam plates 53 and 73 keep a predetermined gap without colliding with each other, and the sealing jaws 51 and 71 collide with each other to heat-seal the tubular film F.

<Horizontal movement mechanism>
The horizontal movement mechanism 20 enables horizontal movement of the support mechanisms 54 and 74, the seal jaws 51 and 71 supported by the support mechanisms 54 and 74, the ironing portions 52 and 72, and the clam plates 53 and 73. As shown in FIG. 8, the horizontal movement mechanism 20 mainly includes a plurality of slide shafts 21, a slide shaft support member 22, and a cam contact member 23.

  The plurality of slide shafts 21 are arranged horizontally with respect to the installation surface of the bag making and packaging machine 1, and are orthogonal to both longitudinal ends of the sealing jaws 51, 71, the squeezing portions 52, 72, the crumb plates 53, 73, and the like. It is provided in the vicinity. In FIG. 8, the slide shaft 21 disposed in front is omitted for easy understanding. Support mechanisms 54 and 74 are attached to the slide shaft 21 so as to be relatively movable.

  The slide shaft support member 22 is a member that supports the plurality of slide shafts 21 at both ends thereof.

  The cam contact member 23 is disposed above the slide shaft 21 and is supported by the slide shaft support member 22. Cams 55 and 75 are provided on the cam contact member 23.

4). Operation of bag making and packaging machine <Overview of operation>
The sheet-like film F sent from the film supply unit 6 to the forming mechanism 13 is wound around the tube 31 from the former 32 and formed into a cylindrical shape, and is conveyed downward by the pull-down belt mechanism 14 as it is. Then, the film F is wound around the tube 31 so that both end portions are overlapped, and the overlapped portion is vertically sealed by the longitudinal seal mechanism 15.

  The cylindrical film F that is vertically sealed passes through the tube 31 and is conveyed to the lower horizontal sealing mechanism 17. At the same time as the cylindrical film F is conveyed, a lump of the packaged material falls from the computer scale 2 through the tube 31.

  The horizontal sealing mechanism 17 seals the cylindrical film F sideways in a state where an article to be packaged exists in the cylindrical film F. Specifically, when the pair of seal jaws 51 and 71 move in the horizontal seal section as shown in FIG. 6, the portion corresponding to the upper end portion of the preceding bag and the lower end portion of the subsequent bag is the horizontal seal. Is done. At the same time as the horizontal sealing, the preceding bag B and the subsequent cylindrical film F are separated from each other by the cutter 51 a built in the sealing jaw 51.

  The bag B manufactured as described above is guided to a belt conveyor (not shown) by the inclined guide plate 19 shown in FIGS. 1 and 2, and transferred to a subsequent process device such as a weight checker.

<Details of horizontal seal operation>
Next, the operation of the lateral seal mechanism 17 of the bag making and packaging machine 1 will be described in detail with reference to FIGS.

  In the horizontal seal mechanism 17, the support mechanisms 54 and 74 move horizontally along the slide shaft 21 by rotating a turning motor (not shown) and approach or separate from the cylindrical film F. The cam followers 58 and 78 move on the horizontal surfaces 55a and 75a and the non-horizontal surfaces 55b and 75b of the cams 55 and 75 in accordance with the horizontal movement of the support mechanisms 54 and 74.

  FIG. 4 shows a state in which the pair of support mechanisms 54 and 74 are located at a place away from the tubular film F. Since the cam followers 58 and 78 are on the horizontal surfaces 55a and 75a, the movement of the crumb plates 53 and 73 is not restricted. Therefore, when the support mechanisms 54 and 74 approach the tubular film F, the crumb plates 53 and 73 also approach the tubular film F according to the movement of the support mechanisms 54 and 74.

  FIG. 5 shows a state in which the support mechanisms 54 and 74 approach the cylindrical film F after that. When the support mechanisms 54 and 74 approach the tubular film F, the clam plates 53 and 73 and the ironing portions 52 and 72 contact the tubular film F earlier than the sealing jaws 51 and 71. The clearance between the clam plates 53 and 73 and the clearance between the ironing portions 52 and 72 are the smallest. The clam plates 53 and 73 block the upper part of the sealed portion without colliding with each other. Moreover, the ironing parts 52 and 72 block the lower part of the part to be sealed without colliding with each other.

  As shown in FIG. 5, the cam followers 58 and 78 are on the non-horizontal surfaces 55b and 75b. When the cam followers 58 and 78 start to move up the non-horizontal surfaces 55b and 75b, the rotation shafts 59 and 79 attached to the center portions 57ca and 77ca of the link mechanisms 57 and 77 start to rotate. In accordance with the rotation of the rotation shafts 59 and 79, the lower end portions 57cb and 77cb of the link mechanisms 57 and 77 are swung in the direction opposite to the traveling direction of the support mechanisms 54 and 74. Thereby, the intermediate members 57b and 77b are pulled in the direction in which the lower end portions 57cb and 77cb are swung, and the crumb plate fixing members 57a and 77a are pulled in the direction in which the intermediate members 57b and 77b are pulled. As a result, a force is applied to the clam plates 53 and 73 in the direction opposite to the traveling direction of the support mechanisms 54 and 74. That is, the crumb plates 53 and 73 are pulled backward with respect to the tubular film F. As a result, the clam plates 53 and 73 stop moving horizontally and keep a predetermined gap without colliding with each other.

  Further, in conjunction with the operation in which the clam plates 53 and 73 are pulled backward with respect to the tubular film F, one ends of the ironing portion connecting members 52b and 72b are pulled backward by the L-shaped members 53c and 73c. Thereby, the ironing parts 52 and 72 also maintain a predetermined gap without colliding with each other.

  Since the seal jaws 51 and 71 are fixed to the support mechanisms 54 and 74, the seal jaws 51 and 71 approach the tubular film F according to the distance that the support mechanisms 54 and 74 approach the tubular film F.

  Thereafter, as shown in FIG. 6, the support mechanisms 54 and 74 further approach the tubular film F. The cam followers 58 and 78 further move on the non-horizontal surfaces 55b and 75b to the vicinity of the top. The lower end portions 57cb and 77cb of the guide members 57c and 77c are greatly shaken in the direction opposite to the traveling direction of the support mechanisms 54 and 74. The intermediate members 57b and 77b are further pulled in the direction in which the lower end portions 57cb and 77cb are swung, and the clam plate fixing members 57a and 77a are greatly pulled in the direction in which the intermediate members 57b and 77b are pulled. As a result, the clam plates 53 and 73 continue to seal the upper portion of the sealed portion while maintaining the minimum gap. The ironing portions 52 and 72 also continue to seal the lower portion of the portion to be sealed while still maintaining the minimum gap. The seal jaws 51 and 71 supported by the support mechanisms 54 and 74 collide with each other and heat-seal the tubular film F.

  The pair of air adjusting mechanisms 56 and 76 attached below the ironing portions 52 and 72 perform horizontal movement in accordance with the horizontal movement of the ironing portions 52 and 72. The air adjusting mechanisms 56 and 76 adjust the amount of air filled in the tubular film F by adjusting the tension of the spring 56a.

5. Features (1) The bag making and packaging machine 1 according to the present embodiment includes seal jaws 51 and 71 supported by support mechanisms 54 and 74, clam plates 53 and 73, and ironing by horizontal surfaces 55a and 75a of cams 55 and 75. The parts 52 and 72 are moved in the same direction as the support mechanisms 54 and 74. On the other hand, on the non-horizontal surfaces 55 b and 75 b of the cams 55 and 75, the clam plates 53 and 73 are moved relative to the support mechanisms 54 and 74 and the seal jaws 51 and 71. Specifically, when the cam followers 58 and 78 move on the horizontal surfaces 55a and 75a (see FIG. 4), the direction in which the support mechanisms 54 and 74 move, and the clam plates 53 and 73 supported by the support mechanisms 54 and 74 are provided. The direction of movement is the same. On the other hand, when the cam followers 58 and 78 move on the non-horizontal surfaces 55b and 75b (see FIGS. 5 and 6), the direction in which the support mechanisms 54 and 74 move does not coincide with the direction in which the clam plates 53 and 73 move. Thus, even when the sealing jaws 51 and 71 collide with each other at high speed to heat-seal the tubular film F, the clam plates 53 and 73 disposed above the sealing jaws 51 and 71 do not collide with each other at high speed. In recent years, as the operating speed of the bag making and packaging machine has increased, the impact sound of the crumb plates 53 and 73 has increased. However, in the bag making and packaging machine 1 according to the present embodiment, the impact sound of the crumb plates 53 and 73 has increased. Can be reduced.

  Furthermore, in the bag making and packaging machine 1 according to the present embodiment, the crumb plates 53 and 73 are designed to keep a predetermined gap from each other without colliding. Thereby, regardless of the strength of the members of the crumb plates 53 and 73, it is possible to prevent early deterioration and breakage due to the collision of the crumb plates 53 and 73.

(2) Further, in the bag making and packaging machine 1 according to the present embodiment, when the crumb plates 53 and 73 start to move relative to the support mechanisms 54 and 74, the movements of the crumb plates 53 and 73 are interlocked. The ironing portions 52 and 72 are also designed to start moving relative to the support mechanisms 54 and 74. Thereby, the ironing parts 52 and 72 arranged below the sealing jaws 51 and 71 also maintain a predetermined gap without colliding with each other. Thereby, regardless of the strength of the members of the ironing portions 52 and 72, it is possible to prevent early deterioration and breakage due to the collision of the ironing portions 52 and 72. Further, it is possible to eliminate the collision sound caused by the collision of the ironing portions 52 and 77 at a high speed.

(3) Conventionally, the bag making and packaging machine is provided with a spring back mechanism in the crumb plate and the squeezing part so that the conveyance of the tubular film F is not hindered by the crumb plate and the squeezing part. As a result, gaps were respectively formed in the crumb plate and the ironing portion. However, when the springback mechanism is used, damping occurs and it is difficult to keep the gap at a constant interval. This is because the gap may become more than a certain interval due to damping. On the other hand, the bag making and packaging machine 1 according to the present embodiment is provided with cam surfaces (horizontal surfaces 55a and 77a and non-horizontal surfaces 55b and 77b) on the cams 55 and 75 so as to ensure a preset minimum gap. Thereby, the gap of the crumb plate and the gap of the ironing portion can be kept at a constant interval.

<Modification>
(1) Although the horizontal seal mechanism 17 according to the present embodiment has been described for the bag making and packaging machine based on the intermittent operation control for intermittent measurement and bag making and packaging, the horizontal seal mechanism 17 is continuously measured and You may apply to any operation control of the continuous operation control which performs bag making packaging. In this case, the horizontal movement mechanism 20 according to the present embodiment can be applied to continuous control by being further designed to move up and down in the transport direction of the tubular film F.

(2) In the bag making and packaging machine 1 according to the present embodiment, the cam surfaces of the cams 55 and 75 are composed of horizontal surfaces 55a and 75a and non-horizontal surfaces 55b and 75b. In the drawing, the non-horizontal surfaces 55b and 75b are Although it was designed to be linearly inclined at a position higher than 75a, the shape of the cam is not limited to the mode shown in the figure. The non-horizontal plane may be lower than the horizontal plane. Further, the non-horizontal plane may not be linearly inclined but may have a curved shape. That is, any cam can be used as long as the seal jaws 51 and 71 supported by the support mechanisms 54 and 74 are close to the tubular film F and the crumb plates 53 and 73 hold a predetermined gap. It does not matter.

(3) Further, in the bag making and packaging machine 1 according to the present embodiment, the cams 55 and 75 are disposed above the support mechanisms 54 and 74 to restrict the operation of the clam plates 53 and 73. , 74 may be provided with a mechanism similar to the cams 55, 75 and the link mechanisms 57, 77. Thereby, operation | movement of the ironing parts 52 and 72 can be controlled similarly to the clam plates 53 and 73.

<Other embodiments>
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  INDUSTRIAL APPLICABILITY The present invention is useful as a bag making and packaging machine capable of preventing biting of an object to be packaged in a sealed portion and preventing a pair of lateral seal auxiliary members from colliding with each other.

It is a perspective view of the bag making packaging machine concerning one embodiment of the present invention. It is a side view of the bag making packaging unit concerning one embodiment of the present invention. It is a perspective view which shows the structure of the horizontal seal | sticker mechanism which concerns on one Embodiment of this invention. It is a schematic diagram for demonstrating operation | movement of the horizontal seal | sticker mechanism which concerns on one Embodiment of this invention. It is a schematic diagram for demonstrating operation | movement of the horizontal seal | sticker mechanism which concerns on one Embodiment of this invention. It is a schematic diagram for demonstrating operation | movement of the horizontal seal | sticker mechanism which concerns on one Embodiment of this invention. It is the elements on larger scale of the horizontal seal mechanism concerning one embodiment of the present invention. It is a perspective view which shows the structure of the horizontal seal | sticker mechanism which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag making packaging machine 13 Forming mechanism 14 Pull-down belt mechanism 15 Vertical seal mechanism 17 Horizontal seal mechanism 20 Horizontal movement mechanism 21 Slide shaft 22 Slide shaft support member 23 Cam contact member 51, 71 Seal jaw (seal member)
54, 74 Support mechanism 52, 72 Ironing part 52a, 72a Ironing part contact member 52b, 72b Ironing part connection member 53, 73 Clam plate (shutter member)
53a, 73a Clam plate contact members 53b, 73b Clam plate connecting members 53c, 73c L-shaped members 55, 75 Cams 55a, 75a Horizontal surfaces 55b, 75b Non-horizontal surfaces 56, 76 Air adjustment mechanisms 57, 77 Link mechanisms 57a, 77a Clam plates Fixed members 57b, 77b Intermediate members 57c, 77c Guide members 57ca, 77ca Center portions 57cb, 77cb Lower end portions 57cc, 77cc Upper end portions 58, 78 Cam followers 59, 79 Rotating shaft

Claims (4)

A bag making and packaging machine that forms a cylindrical packaging material while conveying the packaging material, and fills the cylindrical packaging material with an article to be packaged,
A pair of lateral seal members that abut against the cylindrical packaging material from both sides of the cylindrical packaging material and seal the cylindrical packaging material;
A portion to be sealed of the cylindrical packaging material that is positioned upstream or downstream in the transport direction with respect to the pair of horizontal sealing members and abuts the cylindrical packaging material earlier than the pair of horizontal sealing members. A pair of lateral seal auxiliary members that suppress biting of the article to be packaged,
A cam having a cam surface and allowing the pair of lateral seal auxiliary members to move horizontally along the cam surface;
A cam follower contacting the cam surface;
A link mechanism for connecting the cam follower and the pair of lateral seal auxiliary members;
With
The cam surface is shaped such that the horizontal movement is restricted before the pair of side seal auxiliary members come into contact with each other.
Bag making and packaging machine. The cam has a regulating surface that is the cam surface that regulates the horizontal movement of the pair of lateral seal auxiliary members, and a non-regulating surface that is the cam surface that does not regulate the horizontal movement.
The bag making and packaging machine according to claim 1. The cam surface is shaped such that the horizontal movement of the pair of lateral seal auxiliary members stops while the cam follower moves on the restriction surface.
The bag making and packaging machine according to claim 2. The pair of side seal auxiliary members maintain a constant gap from each other while the cam follower moves on the regulating surface.
The bag making and packaging machine according to claim 2 or 3.

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