JP2013100141A - Bag making and packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag making and packing machine having a simple structure and capable of laying a lateral seal part of a bag horizontally.SOLUTION: The bag making and packing machine 10 includes a lateral seal mechanism 34, a correction mechanism 36, and a bottom forming mechanism 7. The lateral seal mechanism 34 includes a pair of seal jaws 34a and 34b. One of the facing surfaces of the respective seal jaws 34a and 34b is formed into an arrowhead shape and the other is formed into a V shape enabling the one to be engaged with the other. The correction mechanism 36 presses the lateral seal region T2 formed in the lower part of a bag against the bottom surface part of the bag. The bottom forming mechanism 7 receives the lower part of the bag to form the bottom surface part of the bag.

Description

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

  In recent years, as bags for confectionery and the like, self-supporting bags formed into a gusset shape as shown in FIG. 1B are on the market. This self-supporting bag is used for packaging not only confectionery but also a wide variety of items to be packaged because it is easy to display products and has an excellent display effect.

  As an apparatus for producing a gusset-type bag, for example, those described in the following patent documents are known. Among them, in the bag making and packaging machine described in Patent Document 1, first, the packaging material is formed into a cylindrical shape, and then the cylindrical packaging material is sealed in the lateral direction to form a pillow-shaped bag. Subsequently, the conveyance of the bag is temporarily stopped, and the lateral seal portion in the vertical direction at the bottom of the bag, which has been softened by the residual heat immediately after sealing, is bent in the horizontal direction with an L-shaped folding member, thereby Affixed to the bottom of the bag.

JP 2000-335511 A JP 2003-200908 A JP 2005-153939 A

  However, in the bag making and packaging machine described in these patent documents, when forming the bottom of the gusset-type bag, an L-shaped folding member is entered from the horizontal direction, and the lower horizontal seal portion extending in the vertical direction. Needs to be bent horizontally. Therefore, a folding member that reciprocates in the horizontal direction must be provided on the upper surface of the lateral seal device, and there is a problem that the structure is complicated accordingly.

  The subject of this invention is providing the bag making packaging machine which can lay down the horizontal seal | sticker site | part formed in the lower part of a bag with a simple structure in a horizontal direction.

  The bag making and packaging machine according to the first aspect of the present invention includes a horizontal sealing mechanism that forms a horizontal sealing portion on the upper and lower sides of a bag that stores products by thermally welding a cylindrical film in the horizontal direction. This horizontal sealing mechanism includes a pair of sealing jaws that are close to and away from each other with a cylindrical film interposed therebetween, and the opposing surfaces of each sealing jaw are formed in a V-shape in which one side is in an arrowhead shape and the other meshes with it. The sealed lateral seal portion is inclined in the horizontal direction with respect to the bag.

  Thereby, even if it does not provide a folding member separately, a horizontal seal site | part formed in the bottom of a bag can be laid in a horizontal direction only by meshing | engaging a pair of seal jaws.

  A bag making and packaging machine according to a second invention is the bag making and packaging machine according to the first invention, wherein the lateral seal portion disposed below the lateral seal mechanism and formed at the lower portion of the bag is defined as the bottom portion of the bag. And a correction mechanism that is pressed against the head.

  Thereby, the horizontal seal portion inclined in the horizontal direction extends along the bottom surface portion of the bag, and the bottom surface portion is hit, whereby the products in the bag are stored more densely.

  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 first aspect of the present invention, wherein the bag is disposed below the lateral seal mechanism and receives the lower part of the laterally sealed bag, A bottom forming mechanism for shaping the bottom surface portion is further provided.

  Thereby, the bottom face part of a bag can be made flat and a self-supporting type gusset bag can be formed.

  According to the bag making and packaging machine of the present invention, the horizontal seal portion formed on the bottom of the bag can be laid in the horizontal direction simply by laterally sealing the bag. It is not necessary to attach a folding member in the direction. Therefore, it is possible to provide a bag making and packaging machine for gusset bags with a simplified lateral seal mechanism.

It is a perspective view showing the whole bag-making packaging machine composition concerning one embodiment of the present invention. It is a figure which shows the gusset bag manufactured with a bag making packaging machine. It is a perspective view which shows the structure of a shaping | molding mechanism, a pull-down belt mechanism, a vertical seal mechanism, a horizontal seal mechanism, and a gusset formation mechanism contained in the bag making packaging machine of FIG. 1A. It is a disassembled perspective view which shows roughly the structure of each member contained in a bag making packaging machine. It is sectional drawing of a hem part formation mechanism. It is a front view which shows the structure around a gusset formation mechanism and a horizontal sealing mechanism contained in a bag making packaging machine. It is a top view which shows the state by which the folding member was pressed with respect to the cylindrical film. It is a front view which shows the state by which the folding member was pressed with respect to the cylindrical film. It is a schematic diagram which shows the thermocompression bonding and cutting | disconnection operation | movement of a horizontal sealing mechanism. It is an enlarged view which shows a pair of seal jaw of a horizontal seal mechanism. It is a figure which shows operation | movement of a lower horizontal seal site | part attitude | position correction mechanism. It is a figure which shows the state which the front-back movement cylinder moved the contact member to the cylindrical bag direction. It is a figure which shows the state which the vertical movement cylinder moved the contact member to the downward direction. It is a figure which shows a bag receiving part and a contact member among a sending-out mechanism and a bottom formation mechanism. It is a figure which shows the state which the cylindrical bag fell to FIG. 11A. It is a figure which shows the state which the contact member moved by the back-and-forth movement cylinder after FIG. 11B. The figure which shows the state which the contact member moved by the up-and-down moving cylinder after FIG. 11C. The figure which shows the state by which the gusset bag was sent out to the middle path | route. It is a figure which shows the state by which the gusset bag is extruded downstream by the discharge pusher. It is a figure which shows the state which a new cylindrical bag fell on the bag receiving part after FIG. 11F. It is a figure showing the state where a plurality of gusset bags were sent out to the middle course. The front view of the horizontal surface which concerns on a modification (B). It is a figure which shows the bag receiving part and vacuum which concern on a modification (B). It is a figure which shows the lower horizontal seal | sticker part attitude | position correction mechanism which concerns on a modification (C).

  Hereinafter, the bag making packaging machine 10 which concerns on one Embodiment of this invention is demonstrated, referring drawings. In the following description, “left” and “right” of the bag making and packaging machine 10 are based on the case where the bag making and packaging machine 10 is viewed from the front side. Further, regarding the bag making and packaging machine 10, “upstream” and “downstream” mean upstream or downstream in the conveyance direction of the film F.

  The bag making and packaging machine 10 according to the present embodiment produces a gusset-type bag (hereinafter referred to as a gusset bag) B2 shown in FIG. 1B. FIG. 1B is a perspective view of the gusset bag B2. The gusset bag B2 has four side surface portions F1 to F4 and one bottom surface portion BB. The gusset bag B2 is a stand pack that can stand by itself with the bottom surface BB as a support surface. The gusset bag B2 is formed with folded portions (gazettes) G and G, four hem portions H1 to H4, a vertical seal portion L1, an upper horizontal seal portion T1, and a lower horizontal seal portion T2. The gusset bag B2 is formed so that the width of the front and back surfaces is wider than the width of both side surfaces. In the present embodiment, of the four side surface portions F1 to F4, the side surface portion F1 where the vertical seal portion L1 is formed is defined as the front surface of the gusset bag B2.

<Overall configuration of bag making and packaging machine>
First, the whole structure of the bag making packaging machine 10 is demonstrated using FIG. 1A. The bag making and packaging machine 10 is a machine for bagging products such as snacks. The bag making and packaging machine 10 is mainly composed of a bag making and packaging unit 6 for bagging products, and a film supply unit 5 for supplying a sheet-like film F to be a gusset bag B2 to the bag making and packaging unit 6. Yes. In the bag making and packaging unit 6, operation switches 18 are arranged on the right side when facing the front. Further, a liquid crystal display 19 showing an operation state is arranged at a position where a user who operates the operation switches 18 can visually recognize. Below, the structure of each part of the bag making packaging machine 10 is demonstrated.

<Configuration of each part>
1. Film supply unit The film supply unit 5 is a unit which supplies the sheet-like film F to the bag making packaging unit 6 mentioned later. The film supply unit 5 supplies the sheet-like film F so as to synchronize with the operation of a pull-down belt mechanism 32 described later.

2. Bag-making and packaging unit The bag-making and packaging unit 6 is a confectionery or the like weighed by the combination weighing device 2 shown in FIG. 1A while forming the sheet-like film F sent from the film supply unit 5 into a rectangular tube shape. To be packaged to form a gusset bag B2. Hereinafter, the sheet-like film F is transformed into the square tubular film Fm and the tubular bag B1 by each mechanism shown in FIGS. 2A and 2B, and finally becomes the gusset bag B2.

  The bag making and packaging unit 6 mainly includes a hem portion forming mechanism 61, a forming mechanism 31, a pull-down belt mechanism 32, a vertical sealing mechanism 33, a gusset forming mechanism 35, a horizontal sealing mechanism 34, and a lower horizontal sealing portion posture. The straightening mechanism 36, the bottom forming mechanism 7, and the delivery mechanism 8 are provided.

1) Hem Part Forming Mechanism First, the configuration of the hem part forming mechanism 61 will be described with reference to FIG. FIG. 3 is a schematic sectional view of the hem portion forming mechanism 61.

  The hem portion forming mechanism 61 is a mechanism for forming the hem portions H1 to H4 in the sheet-like film F. The hem portion forming mechanism 61 is disposed between the film supply unit 5 and a molding mechanism 31 described later. Specifically, they are arranged in a region indicated by a two-dot broken line R1 in FIG. 2B.

  The hem portion forming mechanism 61 mainly includes a transport surface 610, an insertion member 611, a heater block 612, and a pair of rollers (not shown).

1-1) Conveying surface The film F supplied from the film supply unit 5 is sent to the forming mechanism 31 described later while being in contact with the surface of the conveying surface 610. The conveyance surface 610 includes a plurality of plate-like members m, m,... Extending from upstream to downstream with respect to the film F conveyance direction. A plurality of plate-like members m, m,... Are arranged in the width direction of the film F. The plurality of plate-like members m, m,... Are arranged at predetermined positions so that four narrow gaps 66, 66, 66, 66 are open. As a result, four elongate grooves extending from upstream to downstream with respect to the transport direction of the film F are formed on the transport surface 610.

1-2) Insertion Member The insertion member 611 is a member that is inserted from above into the groove formed in the transport surface 610. Four insertion members 611 are arranged in the width direction of the film F. The film F passing through the vicinity of the groove of the transport surface 610 is brought into contact with the insertion member 611 and inserted into the groove. Thereby, hem part equivalent part H1 '-H4' is formed in the predetermined part of the film F. As shown in FIG.

1-3) Heater Block The heater block 612 is disposed on both sides in the longitudinal direction of the groove formed on the conveyance surface 610. The heater block 612 applies heat from both sides to the hem portion corresponding portions H1 ′ to H4 ′ inserted into the groove of the transport surface 610 by the above-described insertion member 611.

1-4) A pair of rollers A pair of rollers (not shown) are arranged on the downstream side of the conveying surface 610. The pair of rollers sandwich the hem portion equivalent portions H1 ′ to H4 ′ formed on the conveying surface 610 from both sides, and adhere the opposing surfaces of the film F. Thereby, hem parts H1-H4 are formed in the sheet-like film F. FIG.

2) Molding mechanism Next, the molding mechanism 31 will be described with reference to FIGS. 2A and 2B.

  The forming mechanism 31 forms the sheet-like film F on which the hem portions H1 to H4 are formed into a rectangular tube shape. The forming mechanism 31 mainly includes a tube 31a and a former 31b.

2-1) Tube The tube 31a is a rectangular tube-shaped member, and the upper and lower ends are open. The article to be packaged C weighed by the combination weighing device 2 is put into the opening at the upper end of the tube 31a. Guides 312, 312,... Are provided at the lower end opening of the tube 31a. The guides 312, 312,... Are thin plate-like members extending in the downstream direction from the four corners of the lower end opening. The film F is conveyed in the downstream direction along the surface of the tube 31a.

2-2) Former The former 31b is arrange | positioned so that the tube 31a may be surrounded. The shape of the former 31b is such that the sheet-like film F is formed into a cylindrical shape when passing between the former 31b and the tube 31a.

3) Pull-down belt mechanism Next, the pull-down belt mechanism 32 will be described with reference to FIGS. 2A and 2B.

  The pull-down belt mechanism 32 continuously conveys the film F having a rectangular tube shape (hereinafter referred to as a rectangular tube film Fm). The pull-down belt mechanism 32 is a mechanism that sucks the rectangular tube-shaped film Fm wound around the tube 31a and continuously conveys it downward.

  The pull-down belt mechanism 32 mainly includes a belt 32a, a drive roller 32b, a driven roller 32c, and a roller drive motor (not shown).

3-1) Belt The belt 32a is provided on both the left and right sides with the tube 31a interposed therebetween. Further, the belt 32a adsorbs the abutting square tubular film Fm.

3-2) Drive roller, driven roller, and roller drive motor The drive roller 32b is rotated by a roller drive motor (not shown). The driven roller 32c rotates according to the rotation of the driving roller 32b. As the driving roller 32b and the driven roller 32c rotate, the belt 32a described above rotates. Thereby, the square cylindrical film Fm adsorbed by the belt 32a is sent downstream.

4) Vertical Seal Mechanism Next, the vertical seal mechanism 33 will be described with reference to FIG. 2A.

  The vertical sealing mechanism 33 is a mechanism that heats the overlapping portion of the rectangular tubular film Fm wound around the tube 31a and seals it vertically. The vertical seal mechanism 33 is located on the front side of the tube 31a.

  The vertical seal mechanism 33 mainly includes a heater, a heater belt heated by the heater, and a drive device for moving the heater belt closer to or away from the tube 31a. The vertical sealing mechanism 33 seals the overlapping portion of the rectangular tubular film Fm by pressing the overlapping portion of the rectangular tubular film Fm against the tube 31a with a constant pressure and further overheating with a heater. Thereby, the vertical seal | sticker site | part L1 is formed in the square tube-shaped film Fm.

5) Gusset formation mechanism Next, the gusset formation mechanism 35 is demonstrated using FIG. 2A, FIG. 2B, FIG. 4, FIG. 5A and FIG.

  The gusset forming mechanism 35 is a mechanism for forming the gussets G and G of the gusset bag B2. As shown in FIGS. 2A and 2B, the gusset forming mechanism 35 is disposed between the pull-down belt mechanism 32 described above and a lateral seal mechanism 34 described later. As shown in FIG. 4, the gusset forming mechanism 35 mainly includes folding members 35 a and 35 b and a servo motor M.

  The folding members 35a and 35b are thin plate-like members. The pair of folding members 35a and 35b are arranged on the left and right sides of the square tubular film Fm, and sandwich the square tubular film Fm. As shown in FIGS. 4 and 5B, the folding members 35a and 35b move along a substantially circular path by the drive of the servo motor M, and the outer position farthest from the square tubular film Fm is opposite to the outer position. Go back and forth to the inner position on the side. When the folding members 35a and 35b are moved to the inner position, the folding members 35a and 35b enter between the guides 312, 312,. Specifically, as shown in FIG. 5A, the folding members 35 a and 35 b enter between the two guides 312 and 312, respectively. Thereby, the rectangular tubular film Fm is bent by the guides 312, 312,... And the folding members 35a, 35b, and the portions folded inward become the gussets G, G.

6) Horizontal Seal Mechanism Next, the horizontal seal mechanism 34 will be described with reference to FIGS. 2A, 2B, 6 and 7. FIG.

  The horizontal sealing mechanism 34 seals the upper and lower ends of the bag B by sealing the rectangular tube-shaped film Fm horizontally. As shown in FIGS. 2A and 2B, the lateral seal mechanism 34 is disposed below the gusset forming mechanism 35.

  The lateral seal mechanism 34 is composed of a pair of seal jaws 34a and 34b incorporating a heater. The pair of seal jaws 34a, 34b is close to or away from each other. More specifically, the seal jaws 34a and 34b rotate in a D-shape inward from each other on both sides of the tube 31a while being synchronized with each other (see FIG. 6). The sealing jaws 34a and 34b sandwich the square tubular film Fm in a state of being closest to each other. The sealed portion of the rectangular tube-shaped film Fm sandwiched between the sealing jaws 34a and 34b is heat sealed by a built-in heater. Thereby, the upper side seal part T1 and the lower side seal part T2 of the gusset bag B2 are formed. One sealing jaw 34a has a built-in cutter (not shown), and the center of the portion heat-sealed by a single sandwiching operation is cut laterally by the cutter. Thereby, cylindrical bag B1 is cut | disconnected from the square cylindrical film Fm extended in a vertical direction.

  Further, as shown in FIG. 7, the center of the front surface of the sealing jaws 34a and 34b that faces the sealing jaw 34b on the rear side protrudes. Further, the center of the surface of the rear-side seal jaw 34b facing the front-side seal jaw 34a is recessed. More specifically, each internal angle at which the upper end surface 341 or the lower end surface 342 of the seal jaw 34a on the front side intersects each surface of the opposing surface formed in an arrowhead shape is an angle θ1 (110 to 120 degrees). . In addition, the inner angles at which the upper end surface 343 or the lower end surface 344 of the rear seal jaw 34b intersects with the respective opposing surfaces that have bitten inward from each surface are angles θ2 (60 to 70 degrees), respectively. The cross-sectional shape is substantially V-shaped between the opposing surfaces of the sealing jaws 34a and 34b by engaging the arrow-side opposing surface of the front sealing jaw 34a and the concave opposing surface of the rear sealing jaw 34b. A gap 22 is formed. Accordingly, the lateral seal portions T1 and T2 sandwiched between the gaps 22 between the front side seal jaw 34a and the rear side seal jaw 34b are each inclined in the horizontal direction.

7) Lower Horizontal Seal Part Posture Correction Mechanism Next, the lower horizontal seal part posture correction mechanism 36 will be described with reference to FIG. FIG. 8 is a right side view of the lower lateral seal portion posture correcting mechanism 36.

  The lower horizontal seal part posture correcting mechanism 36 is disposed downstream of the horizontal seal mechanism 34. The lower horizontal seal part posture correcting mechanism 36 is a mechanism that brings the lower horizontal seal part T2 into contact with the surface of the main body of the cylindrical bag B1. More specifically, the lower horizontal seal part posture correcting mechanism 36 is a mechanism that brings the lower horizontal seal part T2 into contact with a part of the main body of the cylindrical bag B1. Here, the main body portion of the tubular bag B1 is the entire portion of the entire tubular bag B1 except for the upper lateral seal portion T1 and the lower lateral seal portion T2. Here, a part of the main body portion is a bottom surface equivalent portion BB ′ formed by the weight of the article to be packaged.

  The lower horizontal seal part posture correcting mechanism 36 mainly includes a lower horizontal seal part push-up member 361 and a support member 362.

7-1) Lower horizontal seal part push-up member The lower horizontal seal part push-up member 361 is a rectangular plate-shaped member. The length in the longitudinal direction of the lower horizontal seal part push-up member 361 is approximately the same as the width of the front surface and the back surface of the tubular bag B1. Further, the length in the short direction of the lower horizontal seal part push-up member 361 is approximately the same as the width of the right side surface and the left side surface of the cylindrical bag B1.

  One end in the short side direction of the lower horizontal seal part push-up member 361 is fixed to the support shaft 361a. The support shaft 361a is attached to an internal frame (not shown) of the bag making and packaging unit 6 on the front side of the cylindrical bag B1. As shown in FIG. 8, the lower horizontal seal part push-up member 361 is configured to be movable up and down around a support shaft 361a. That is, the other end in the short side direction of the lower horizontal seal part push-up member 361 is rotatable about the support shaft 361a. The lower horizontal seal part push-up member 361 moves up and down when a support member 362 described later is driven, and contacts the lower horizontal seal part T2 at the upper position.

7-2) Support Member The support member 362 is a member that supports the lower horizontal seal part push-up member 361 from below. One end of the support member 362 is also attached to an internal frame (not shown) of the bag making and packaging unit 6. The other end of the support member 362 is attached to the lower surface of the lower lateral seal site push-up member 361, that is, the surface opposite to the surface in contact with the lower lateral seal site T2. The support member 362 has a mechanism that can expand and contract. The support member 362 is expanded and contracted at a predetermined timing by a motor (not shown). Here, the predetermined timing is before the upper horizontal seal portion T1 is formed and the tubular bag B1 is separated from the tubular film Fm. As a result, the support member 362 moves the lower horizontal seal part push-up member 361 up and down.

8) Bottom Formation Mechanism Next, the bottom formation mechanism 7 will be described with reference to FIGS. 9, 10 and 11A. 9 and 10 are right side views of the bottom forming mechanism 7. FIG. FIG. 11A is a view showing a bag receiving portion 71 of the bottom forming mechanism 7 and a delivery mechanism 8 described later.

  The bottom forming mechanism 7 is disposed downstream of the above-described lateral sealing mechanism 34 and adjusts the shape of the cylindrical bag B1. Specifically, the bottom forming mechanism 7 includes a lower horizontal seal portion T2 formed in the cylindrical bag B1, and a main body portion in the vicinity of the bottom surface portion corresponding portion BB ′ and the bottom surface portion corresponding portion BB ′ of the cylindrical bag B1. A gusset bag B2 having a suitable square bottom shape is formed by forming a horizontal bottom surface portion BB.

  The bottom forming mechanism 7 mainly includes a bag receiving portion 71, vacuums 73 and 73, and a pressing portion 74.

8-1) Bag receiving part The bag receiving part 71 is arrange | positioned under the lower horizontal seal | sticker site | part attitude | position correction mechanism 36, and receives the cylindrical bag B1 cut | disconnected from the square cylindrical film Fm by the horizontal seal mechanism 34, and dropped. The bag receiving portion 71 includes a horizontal surface 710 that receives the cylindrical bag B1 that has dropped from above, and vertical surfaces 711a and 711b that rise vertically upward from the horizontal surface 710.

(Horizontal plane)
The horizontal surface 710 is a plate made of a material having high heat conductivity. For example, aluminum is used as a high heat transfer material. The horizontal plane 710 has a rectangular shape. The length in the longitudinal direction of the horizontal plane 710 is approximately the same as the width of the front surface and the back surface of the cylindrical bag B1. Moreover, the length of the horizontal direction of the horizontal surface 710 is approximately the same as the width of the right side surface and the left side surface of the cylindrical bag B1. The horizontal surface 710 is in contact with the lower horizontal seal portion T2 of the cylindrical bag B1 and a part of the main body (bottom surface equivalent portion BB ′). A heater 710 b extending in the longitudinal direction of the horizontal plane 710 is provided at the center of the horizontal plane 710. The heater 710b is turned on before the tubular bag B1 falls on the horizontal plane 710, and is turned off after a force is applied to the tubular bag B1 by the vertically moving cylinders 743a and 743b described later. The weight of the article to be packaged contained in the cylindrical bag B1 and the downward force by the pressing portion 74 described later are applied to the lower horizontal seal portion T2 and the bottom surface equivalent portion BB ′. As a result, the lower horizontal seal portion T2 and the bottom surface equivalent portion BB ′ are heat-welded.

  Further, the horizontal plane 710 is provided with a plurality of holes 710a, 710a,. Specifically, as shown in FIG. 11A, a plurality of holes 710a, 710a,... Are arranged in two rows in the longitudinal direction. More specifically, the two rows of holes 710a, 710a,... Arranged in the longitudinal direction are arranged in a row substantially in parallel with the heater 710b described above interposed therebetween.

(Vertical surface)
The vertical surfaces 711a and 711b include a front-side vertical surface 711a that is a surface facing the front surface of the tubular bag B1, and a back-side vertical surface 711b that is a surface facing the back surface of the tubular bag B1. As described above, the vertical surfaces 711a and 711b rise vertically upward from the horizontal surface 710. That is, the front-side vertical surface 711a rises vertically upward from one front-side end of the horizontal surface 710, and the back-side vertical surface 711b rises vertically upward from one rear-side end of the horizontal surface 710.

8-2) Vacuum The vacuums 73 and 73 are formed by connecting the bottom portion equivalent portion BB ′ and the main body portion near the bottom portion equivalent portion BB ′ through the plurality of holes 710 a, 710 a,. Suction. The vacuums 73 and 73 are provided according to the number of rows formed of a plurality of holes 710a and 710a. That is, as shown in FIGS. 9 and 10, a single vacuum 73 is connected to a plurality of holes 710a, 710a,... Arranged in a row on the front side of the cylindrical bag B1, and the cylindrical bag One vacuum 73 is also connected to a plurality of holes 710a, 710a,... Arranged on the back side of B1.

  The vacuums 73 and 73 are turned on before the cylindrical bag B1 falls on the horizontal plane 710. After a downward force is applied to the cylindrical bag B1 by the vertical movement cylinders 743a and 743b described later, the vacuums 73 and 73 are , Switch to OFF. Accordingly, when the cylindrical bag B1 falls on the horizontal plane 710, a plurality of portions of the cylindrical bag B1 located above the plurality of holes 710a, 710a,... And in the vicinity of the plurality of holes 710a, 710a,. Are sucked through the holes 710a, 710a,...

8-3) Pressing part The pressing part 74 is a member that presses the tubular bag B1 against the above-described bag receiving part 71. The pressing part 74 mainly has contact members 741a and 741b and moving means 742a, 742b, 743a and 743b.

(Contact member)
The contact members 741a and 741b are rectangular flat plate members having the same width as the front and back surfaces of the cylindrical bag B1. The contact members 741a and 741b include a front-side contact member 741a that can contact the front surface of the tubular bag B1 and a back-side contact member 741b that can contact the back surface of the tubular bag B1. As shown in FIG. 9, each of the front side contact member 741a and the back side contact member 741b is inclined at a predetermined angle θ3 with respect to the cylindrical bag B1.

(transportation)
The moving means 742a, 742b, 743a, 743b moves the contact members 741a, 741b described above to contact the upper part of the main body of the cylindrical bag B1 to apply or separate the force.

  The moving means 742a, 742b, 743a, 743b include front and rear moving cylinders 742a, 742b for moving the contact members 741a, 741b in the front-rear direction with respect to the cylindrical bag B1, and the contact members 741a, 741b as the cylindrical bag B1. And vertical movement cylinders 743a and 743b that move in the vertical direction.

  Further, the front and rear moving cylinders 742a and 742b include a front side front and rear moving cylinder 742a disposed on the front side of the cylindrical bag B1 and a back side front and rear moving cylinder 742b disposed on the rear side of the cylindrical bag B1. It is. The vertical movement cylinders 743a and 743b include a front side vertical movement cylinder 743a disposed on the front side of the cylindrical bag B1 and a back side vertical movement cylinder 743b disposed on the rear side of the cylindrical bag B1. It is.

  The front and rear moving cylinders 742a and 742b are fixed to vertical movement cylinders 743a and 743b, which will be described later, via connecting members 76 and 76, respectively. Specifically, the front side front / rear moving cylinder 742a is fixed to the front side vertical movement cylinder 743a via the connection member 76, and the back side front / rear movement cylinder 742b is fixed to the rear side vertical movement cylinder 743b via the connection member 76. Is done.

  The front and rear moving cylinders 742a and 742b extend in the direction indicated by the arrows A1 and A1 in FIG. 9 and contract in the direction opposite to the direction indicated by the arrows A1 and A1. As a result, the front and rear moving cylinders 742a and 742b cause the contact members 741a and 741b to contact or separate from the upper part of the main body of the cylindrical bag B1 via the vertical moving cylinders 743a and 743b.

  When the front and rear moving cylinders 742a and 742b extend in the direction indicated by the arrows A1 and A1, that is, when the front and rear moving cylinders 742a and 742b move the contact members 741a and 741b forward, the contact member 741a. , 741b are in contact with the front surface and the back surface of the cylindrical bag B1 to correct the posture of the cylindrical bag B1.

  The vertically moving cylinders 743a and 743b are fixed to the contact members 741a and 741b via the support members 75 and 75 that support the contact members 741a and 741b. Specifically, the front side vertical movement cylinder 743a is fixed to the front side contact member 741a via the support member 75. Further, the back side up / down moving cylinder 743b is fixed to the back side contact member 741b via a support member 75.

  The vertically moving cylinders 743a and 743b extend in a direction indicated by arrows A2 and A2 in FIG. 10 and contract in a direction opposite to the direction indicated by arrows A2 and A2. Thereby, the vertical movement cylinders 743a and 743b move the contact members 741a and 741b up and down. More specifically, the vertical movement cylinders 743a and 743b move the lower ends of the contact members 741a and 741b from the upper position P1 shown in FIGS. 9 and 10 to the lower position P2 shown in FIG. The distance d between the upper position P1 and the lower position P2 is about 1 cm. When the lower ends of the contact members 741a and 741b are at the lower position P2, the vertical movement cylinders 743a and 743b apply a downward force to the front and back surfaces of the cylindrical bag B1 via the contact members 741a and 741b. Thereby, the shape of cylindrical bag B1 deform | transforms so that the shape of the above-mentioned bag receiving part 71 may be followed. That is, by the vertical movement cylinders 743a and 743b, the lower horizontal seal portion T2, the bottom surface portion corresponding portion BB ', and the main body portion in the vicinity of the bottom surface portion corresponding portion BB' of the cylindrical bag B1, And it deform | transforms so that it may closely_contact | adhere to the back side vertical surface 711b. As a result, the bottom surface portion BB is formed in the cylindrical bag B1, and a suitable square-bottomed gusset bag B2 is formed.

9) Delivery mechanism Next, the delivery mechanism 8 will be described with reference to FIG. 2B and FIGS. 11A to 11H. 11A to 11H are plan views showing the horizontal plane 710 and contact members 741a and 741b of the bottom forming mechanism 7 and the delivery mechanism 8. FIG. The delivery mechanism 8 is a mechanism for delivering the gusset bag B2, which is the cylindrical bag B1 in which the bottom surface portion BB is formed by the bottom formation mechanism 7, to the boxing stage. As shown in FIGS. 11A to 11H, the gusset bag B2 is conveyed along a substantially L-shaped path.

  The delivery mechanism 8 mainly includes delivery units 80a and 80b, a middle path 81, a discharge pusher 82, and a belt conveyor 83.

9-1) Sending-out part The sending-out parts 80a and 80b move the gusset bag B2 from the bag receiving part 71 to the middle path 81 described later. The delivery parts 80a and 80b include a front delivery part 80a located on the front side of the gusset bag B2 and a back delivery part 80b located on the back side of the gusset bag B2. The sending parts 80a and 80b send the gusset bag from the bag receiving part 71 to the relay path 81 using both the front side sending part 80a and the back side sending part 80b.

  The delivery portions 80a and 80b mainly contact the pair of belts 801a and 801b, the rollers 802a, 802a, 802b, and 802b that drive the belts 801a and 801b, and the surface of each belt 801a and 801b, that is, the gusset bag B2. It consists of fins 803a, 803a, 803b, and 803b attached to the contact surface. Specifically, the delivery portion 80a located on the front side of the gusset bag B2 includes a belt 801a, rollers 802a and 802a for driving the belt 801a, and fins 803a and 803a attached to the contact surface of the belt 801a. . The delivery portion 80b located on the back side of the gusset bag B2 includes a belt 801b, rollers 802b and 802b for driving the belt 801b, and fins 803b and 803b attached to the contact surface of the belt 801b.

(belt)
As shown in FIG. 2B, the belts 801a and 801b are arranged so as to sandwich the gusset bag B2 above the vertical surfaces 711a and 711b. Specifically, the belts 801a and 801b are arranged one by one on the front side and the back side of the gusset bag B2. More specifically, a belt 801a is disposed on the front side of the gusset bag B2, and a belt 801b is disposed on the back side of the gusset bag B2. The belts 801a and 801b have the same length as the width of the front and back of the gusset bag B2.

(roller)
As shown in FIGS. 11A to 11H, rollers 802a, 802a, 802b, and 802b are arranged inside the belts 801a and 801b. Specifically, rollers 802a and 802a are provided inside the belt 801a disposed on the front side of the gusset bag B2. Further, rollers 802b and 802b are provided on the inner side of the belt 801b disposed on the back side of the gusset bag B2. One of the two rollers 802a and 802a arranged inside one belt 801a is driven by a roller drive motor (not shown). The other roller 802a rotates in accordance with the rotation of one roller 802a. As the rollers 802a, 802a, 802b, and 802b rotate, the belts 801a and 801b described above move. The rollers 802a and 802a that rotate the belt 801a disposed on the front side of the gusset bag B2 and the rollers 802b and 802b that rotate the belt 801b disposed on the back side of the gusset bag B2 rotate in synchronization. As a result, the belts 801a and 801b also move in synchronization.

(fin)
Two fins 803a, 803a, 803b, and 803b are attached to the contact surfaces of the belts 801a and 801b that contact the gusset bag B2. Specifically, the fins 803a and 803a are attached to the contact surface of the belt 801a disposed on the front side of the gusset bag B2, and the fins 803b and 803b are disposed on the contact surface of the belt 801b disposed on the back side of the gusset bag B2. Is attached.

  The two fins 803a, 803a, 803b, and 803b attached to the belts 801a and 801b are disposed on the contact surfaces of the belts 801a and 801b so that they are in a point-symmetrical position. Specifically, the fins 803b and 803b are arranged at symmetrical positions with respect to the center point O of the delivery portion 80b, as shown in the back side delivery portion 80b of FIG. 11A. Therefore, when one of the fins 803a, 803a, 803b, and 803b is in contact with the gusset bag B2, the other fin 803a and 803b is in contact with the gusset bag B2. do not do. The belts 801a and 801b move while synchronizing. Then, one fin 803a, 803b (hereinafter referred to as a pair of fins 803a, 803b) of each belt 801a, 801b comes into contact with the gusset bag B2, and the pair of fins 803a, 803b starts to push the gusset bag B2. As a result, the gusset bag B2 is sent to the upstream side of the adjacent middle path 81. The gusset bag B2 is sent from the horizontal plane 710 to the middle path 81 in a state where the front face is directed to a belt conveyor 83 described later, and stands upright at one end on the upstream side of the middle path 81.

9-2) Middle Path The middle path 81 is a path that connects the bottom forming mechanism 7 and the belt conveyor 83. Specifically, the intermediate path 81 is used to carry the gusset bag B2 sent out from the bottom forming mechanism 7 by the sending-out portions 80a and 80b to the belt conveyor 83 described later.

  The middle path 81 is a rectangular plate extending from upstream to downstream. The plate is made of a highly heat conductive material (for example, aluminum). One end on the upstream side of the middle path 81 is connected to the bottom forming mechanism 7. A belt conveyor 83 is connected to one end on the downstream side of the middle path 81. That is, one end on the upstream side of the middle path 81 from the bottom forming mechanism 7 is connected in a straight line, and one end on the downstream side of the middle path 81 is connected in a straight line with the belt conveyor 83. A path connected from the bottom forming mechanism 7 to one end on the upstream side of the middle path 81 corresponds to a bottom side portion of a substantially L-shaped path through which the gusset bag B2 is conveyed.

  The height of the conveying surface at one end on the upstream side of the middle path 81 is approximately the same as the level surface 710 of the bottom forming mechanism 7. Further, the height of one end on the downstream side of the middle path 81 is approximately the same as the height of one end on the upstream side of the belt conveyor 83.

  The middle path 81 has a built-in heater 811 having a predetermined length in the longitudinal direction. The heater 811 heats the bottom surface portion BB of the gusset bag B2 sent out to the middle path 81. The position where the heater 811 is built in the middle path 81 is preferably the center in the width direction of the middle path 81. Thereby, the heat of the heater 811 is widely transmitted to the entire middle path 81.

9-3) Discharge Pusher The discharge pusher 82 is provided at one end on the upstream side of the middle path 81 as shown in FIGS. 11A to 11H. The discharge pusher 82 has a contact surface that makes contact with the back surface of the gusset bag B2. The contact surface of the discharge pusher 82 is movable in the front-rear direction.

  The discharge pusher 82 comes into contact with the back surface of the gusset bag B <b> 2 sent to one end on the upstream side of the middle path 81. Further, the discharge pusher 82 moves the contact surface forward (downstream) at predetermined time intervals (see FIG. 11F). Thereby, the gusset bag B2 moves from the upstream side of the middle path 81 to the downstream side. More specifically, the gusset bag B <b> 2 is pushed out from the most upstream region of the middle path 81, that is, from a position that is in a straight line from the horizontal surface 710 of the bottom forming mechanism 7.

9-4) Belt conveyor The belt conveyor 83 is arrange | positioned downstream of the middle path | route 81 as FIG. 11A-FIG. 11H show. The belt conveyor 83 sends the gusset bag B2 sent out from the upstream middle path 81 downstream.

<Flow of operation of bag making and packaging machine>
The film supply unit 5 supplies the sheet-like film F to the bag making and packaging unit 6. The sheet-like film F supplied by the film supply unit 5 first passes through the hem portion forming mechanism 61 (see FIG. 3). Therefore, hem portions H1 to H4 are formed on the sheet-like film F.

  Thereafter, the sheet-like film F passes through the forming mechanism 31 (see FIGS. 2A and 2B). By passing through the forming mechanism 31, the sheet-like film F is formed into a rectangular tube-like film Fm having hem portions H1 to H4.

  Further, the rectangular tubular film Fm is conveyed downstream by the pull-down belt mechanism 32. The rectangular tubular film Fm conveyed downstream is heated and bonded by the vertical sealing mechanism 33 at the overlapping portion. Thereby, the vertical seal | sticker site | part L1 is formed in the square cylindrical film Fm.

  Next, the rectangular tubular film Fm is sent to the gusset forming mechanism 35 (see FIG. 4). Here, the rectangular tube-shaped film Fm is sandwiched and folded between the folding members 35a and 35b and the guides 312, 312,... (See FIG. 5A). Thereby, the gussets G and G are formed in the cylindrical film Fm.

  Furthermore, the rectangular tube-shaped film Fm is conveyed downstream, and the horizontal sealing is performed by the horizontal sealing mechanism 34 (see FIG. 6). Specifically, the horizontal sealing mechanism 34 first forms the lower horizontal sealing portion T2 in the square tubular film Fm. At the timing when the horizontal seal mechanism 34 forms the lower horizontal seal portion T2, or at the timing when the horizontal seal mechanism 34 is formed, the article C to be packaged weighed by the combination weighing device 2 is fed from the tube 31a into the square tubular film Fm. The lower lateral seal portion T2 is inclined at a predetermined angle by the gap 22 formed in the pair of seal jaws 34a and 34b (see FIG. 7). The lower lateral seal portion T2 tilted at a predetermined angle is further largely tilted by the lower lateral seal portion posture correcting mechanism 36 and is brought into contact with the bottom surface portion equivalent portion BB ′ of the cylindrical bag B1 (see FIG. 8).

  The horizontal sealing mechanism 34 further horizontally seals the upper horizontal sealing portion T1 of the square tubular film Fm. Moreover, the horizontal seal | sticker mechanism 34 cut | disconnects the center of the upper horizontal seal | sticker site | part T1 with the cutter which is not shown in figure. Thereby, cylindrical bag B1 is cut | disconnected from the square cylindrical film Fm.

  The bottom portion BB of the gusset bag B2 is formed by the bottom forming mechanism 7 on the tubular bag B1 that has been separated from the square tubular film Fm and dropped (see FIGS. 9 and 10).

  Specifically, first, the dropped cylindrical bag B1 is received by the bag receiving portion 71 (see FIG. 11B). Next, the pressing portion 74 contacts the upper portion of the cylindrical bag B1, and presses the cylindrical bag B1 against the bag receiving portion 71 (see FIGS. 9, 11C, 10 and 11D).

  Specifically, the moving means 742a, 742b, 743a, and 743b cause the contact members 741a and 741b tilted at a predetermined angle θ3 to contact the upper part of the cylindrical bag B1 from the front side and the rear side of the cylindrical bag B1. A force is applied to the bag B1. More specifically, first, the front side contact member 741a disposed on the front side of the tubular bag B1 and the back side contact member 741b disposed on the back side of the tubular bag B1 by the front and rear moving cylinders 742a and 742b. However, each moves toward the cylindrical bag B1 to correct the posture of the cylindrical bag B1 (see FIGS. 9 and 11C). Further, the front side contact member 741a and the back side contact member 741b are pushed downward by the vertically moving cylinders 743a and 743b, and downward force is applied to the cylindrical bag B1 (FIGS. 10 and 11D).

  At this time, the heater 710b built in the horizontal surface 710 is in an ON state. Therefore, heat is applied by the heater 710b to the overlapping portion of the lower horizontal seal portion T2 in contact with the heater 710b and the bottom surface equivalent portion BB ′.

  At this time, the vacuums 73 and 73 are also ON. Therefore, the bottom portion equivalent portion BB ′ and the bottom portion equivalent portion BB ′ of the cylindrical bag B1 in which the vacuum 73, 73 is pressed against the horizontal plane through the plurality of holes 710a, 710a,. The main body part in the vicinity is sucked.

  The main body portion in the vicinity of the bottom surface equivalent portion BB ′ of the cylindrical bag B1 is in close contact with the bag receiving portion 71 by the pressing portion 74 and the vacuum 73. Thus, the bottom surface portion BB of the gusset bag B2 is formed into a square bottom shape obtained by the horizontal surface 710 of the bag receiving portion 71 and the vertical surfaces 711a and 711b.

  Thereafter, the gusset bag B2 is sent out from the bottom forming mechanism 7 to the middle path 81 by the sending-out portions 80a and 80b (see FIG. 11E). The back face of the gusset bag B2 sent to the middle path 81 is pushed by the discharge pusher 82 at predetermined time intervals and moves in the downstream direction (see FIG. 11F). A new cylindrical bag B1 falls on the bag receiving portion 71 (see FIG. 11G). A plurality of gusset bags B2, B2, B2 are arranged in the middle path 81 (see FIG. 11H). Of the plurality of gusset bags B2, B2, and B2 arranged in the middle path 81, the leading gusset bag B2 is sent to the belt conveyor 83 so as to be pushed out to the subsequent gusset bags B2, B2, and B2.

<Features of bag making and packaging machine>
(1)
In the bag making and packaging machine 10 of the embodiment, the bottom forming mechanism 7 is provided below the lateral seal mechanism 34. The bottom forming mechanism 7 receives the tubular bag B1 that has been dropped by the bag receiving portion 71, and forms the bottom surface portion BB of the gusset bag B2. At this time, when the packaged item has a weight such as coffee or flour, the bottom surface portion BB can be stably formed using the weight of the packaged item. That is, the overlapping portion of the lower horizontal seal portion T2 and the bottom surface portion equivalent portion BB 'can be sufficiently thermocompression-bonded by the weight of the article to be packaged, and the bottom surface portion BB having a sufficient area can be formed.

  However, when the article to be packaged is lightweight, such as potato chips or marshmallows, the thermocompression bonding of the overlapping portion between the lower lateral seal portion T2 and the bottom portion equivalent portion BB 'becomes insufficient, and the bottom portion BB having a sufficient area. Can not form.

  In the bottom forming mechanism 7 according to the present embodiment, when the cylindrical bag B1 is dropped, the vacuum 73 puts the cylindrical bag B1 into the bag receiving portion 71 through a plurality of holes 710a, 710a,. Suction is performed so as to be in close contact (see FIG. 10). Thereby, irrespective of the weight of the packaged item, the overlapping portion of the lower horizontal seal portion T2 and the bottom surface equivalent portion BB 'can be sufficiently thermocompression bonded, and further, the bottom surface portion BB having a sufficient area is formed. can do.

  Also, this method can maintain the operating speed of the bag making and packaging machine 10 and quickly form a gusset type bag.

(2)
Moreover, the bag making and packaging machine 10 according to the above-described embodiment includes the pressing unit 74. Specifically, when the cylindrical bag B1 falls on the bag receiving portion 71, the front and rear moving cylinders 742a and 742b operate, and the front side contact member 741a and the back side contact member 741b are connected to the front side of the cylindrical bag B1. And the cylindrical bag B1 from the back side. Thereby, for example, even when the cylindrical bag B1 is tilted at the time of dropping to the bag receiving portion 71, the cylindrical bag B1 can be raised at an appropriate angle.

  Further, the vertical movement cylinders 743a and 743b operate, and the front side contact member 741a and the back side contact member 741b apply a downward force to the cylindrical bag B1. As a result, the main body portion in the vicinity of the bottom surface equivalent portion BB ′ that was not in contact with the bag receiving portion 71 at the beginning is expanded so as to be in close contact with the horizontal surface 710 and the vertical surfaces 711 a and 711 b of the bag receiving portion 71. Thereby, the suitable square bottom gusset bag B2 along each surface of the bag receiving part 71 can be manufactured stably. Moreover, by pushing down the article to be packaged C together with the air in the gusset bag B2, the gusset bag B2 can be made more stable.

(3)
Further, in the bag making and packaging machine 10 according to the above embodiment, the front contact member 741a and the back contact member 741b are inclined at a predetermined angle with respect to the cylindrical bag B1. Therefore, even when the front contact member 741a and the back contact member 741b are moved by the front and rear moving cylinders 742a and 742b and are in contact with the cylindrical bag B1, a downward force is applied to the cylindrical bag B1. Added. Thereby, gusset bag B2 can be formed in the state where cylindrical bag B1 was stabilized.

(4)
In the bag making and packaging machine 10 according to the above embodiment, the heater 710 b is built in the horizontal surface 710 of the bag receiving portion 71. Therefore, the lower lateral seal portion T2 can be firmly attached to the bottom surface equivalent portion BB ′.

(5)
Furthermore, in the bag making and packaging machine 10 according to the above embodiment, the gap 22 formed between the opposing surfaces of the pair of seal jaws 34a and 34b is substantially V-shaped. As a result, a lower lateral seal portion T2 tilted in a certain direction is formed. Further, before the cylindrical bag B1 is cut off from the square tubular film Fm, the lower horizontal seal portion T2 is largely inclined by the lower horizontal seal portion posture correcting mechanism 36. Thereby, when the cylindrical bag B1 falls to the bag receiving portion 71, the lower horizontal seal portion T2 can be brought into contact with the bottom surface equivalent portion BB '.

<Modification>
(A)
In the above embodiment, the continuous bag making operation has been described as an example, but an intermittent bag making operation may be used. Even in this case, the bag-making operation can be performed at a higher speed than in the prior art.

(B)
In the embodiment described above, in the horizontal plane 710 of the bag receiving portion 71, two rows of holes 710a, 710a,... Aligned in the longitudinal direction are arranged in a row substantially in parallel with the heater 710b interposed therebetween. As shown in FIG. 12B, two rows may be arranged across the heater 710b. Further, the number of rows of the plurality of holes 710a, 710a,... May be designed so that three rows are arranged.

  At this time, as shown in FIG. 12B, a plurality of vacuums 73 may be provided according to the number of rows of holes 710a, 710a,. When a plurality of vacuums 73a, 73b,... Are provided, the main body of the cylindrical bag B1 may be sucked from the vacuum near the center. That is, first, the vacuum 73a, 73a sucks the main body of the cylindrical bag B1 through the hole near the heater 710b, and then the vacuum 73b, 73b sucks the main body of the cylindrical bag B1. Thereby, the area of the main-body part of cylindrical bag B1 closely_contact | adhered to the horizontal surface 710 can be expanded gradually. That is, the shape of the bottom surface portion BB of the gusset bag B2 can be reliably brought close to the desired shape.

(C)
In the above embodiment, the width of the lower horizontal seal part push-up member 361 is approximately the same as the width of the front and back surfaces of the cylindrical bag B1, but the width of the lower horizontal seal part push-up member 361 is the lower horizontal seal. The width may be such that it partially contacts the part.

  In addition, the length of the lower side seal portion push-up member 361 is approximately the same as the width of the right side surface and the left side surface of the cylindrical bag B1, but has a length that contacts the lower side seal portion T2. It only has to be.

  Furthermore, as shown in FIG. 13, a heater may be incorporated in the lower horizontal seal part push-up member 361. Thereby, lower horizontal seal part T2 and a main-body part can be adhere | attached more firmly.

(D)
In the above embodiment, when the cylindrical bag B1 is pressed by the pressing portion 74, the contact members 741a and 741b are moved using the front and rear movement cylinders 742a and 742b and the vertical movement cylinders 743a and 743b. Instead of 742b and the vertically moving cylinders 743a and 743b, the cylindrical bag B1 may be pressed against the bag receiving part 71 using a cylinder that moves the contact members 741a and 741b in an oblique direction.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

  The bag making and packaging machine of the present invention can be widely applied to a bag making and packaging machine that forms a bottom surface portion by horizontally laying a lateral seal portion formed in a lower portion of a gusset bag.

2 Combination Weighing Device 5 Bag Making and Packaging Unit 6 Film Supply Unit 7 Bottom Forming Mechanism 8 Feeding Mechanism 10 Bag Making and Packaging Machine 31 Molding Mechanism 32 Pull-down Belt Mechanism 33 Vertical Sealing Mechanism 34 Horizontal Sealing Mechanism 35 Gazette Forming Mechanism 36 Lower Horizontal Sealing Part Position Correction mechanism (correction mechanism)
61 Hem portion forming mechanism 71 Bag receiving portion 80a, 80b Delivery portion 81 Middle path 82 Discharge pusher 83 Belt conveyor 710 Horizontal surface 710a, 710a, ... Hole 710b Heater 711a Front side vertical surface 711b Rear side vertical surface 73, 73 Vacuum 74 Pressing part 741a, 741b Contact member 742a, 742b Back and forth moving cylinder 743a, 743b Vertical moving cylinder F Sheet-like film Fm Square tubular film B1 Cylindrical bag B2 Gazette bag (Completed)

Claims (3)

It is a bag making and packaging machine equipped with a horizontal seal mechanism that forms a horizontal seal portion on the top and bottom of a bag for storing products by thermally welding a cylindrical film in a horizontal direction,
The lateral sealing mechanism includes a pair of sealing jaws that are close to and away from each other with a cylindrical film interposed therebetween,
Each of the opposing surfaces of the pair of seal jaws is formed in a V shape in which one side is an arrowhead shape and the other meshes with the other, and the sealed lateral seal portion is inclined in the horizontal direction with respect to the bag.
Bag making and packaging machine. A bag making and packaging machine according to claim 1,
A correction mechanism that is disposed below the lateral seal mechanism and further presses the lateral seal portion formed at the bottom of the bag against the bottom surface of the bag;
Bag making and packaging machine. A bag making and packaging machine according to claim 1,
A bottom forming mechanism that is disposed below the lateral seal mechanism, receives a lower portion of the bag, and shapes a bottom surface of the bag;
Bag making and packaging machine.

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