JP5227364B2 - Device for forming an open surface, bag bottom, head forming device, bag manufacturing device, method for forming an open surface, and method for manufacturing a gusset bag - Google Patents

Description

  The present invention is to manufacture a gusset bag with a material such as a plastic film that can be welded in a continuous work process, in particular, the bottom or head of the bag is flattened to have a gusset, and a reinforcing film, The present invention relates to a device for forming an opening surface that facilitates setting of an interposed member such as a cut tape and a chuck, a bag bottom, a head forming device, a bag manufacturing device, a method for forming an opening surface, and a method for manufacturing a gusset bag.

  Conventionally, a body made of plastic film is layered in two layers, and a body feed mechanism that intermittently feeds a fixed length, and a gusset made of plastic film are fed out. Folded in two on both sides of the center line, and the bi-folded gusset material is guided in the width direction of the body for each intermittent feed of the body at a predetermined position of the body feed path, and the two-layer body A gusset material feeding mechanism inserted between the gusset material, a gusset material cutting mechanism for cutting the gusset material with a length corresponding to the width of the body after insertion of the gusset material, or after the insertion of the gusset material; A heater for heat-sealing the body material and the gusset material along a longitudinal center line of the gusset material, and after the heat sealing of the body material and the gusset material, the body material Preliminary bag making machine equipped with a cutter which the gusset material is cut along the longitudinal centerline of the gusset material is present (for example, see Patent Document 1).

JP-A-9-277406

  However, when the bottom part of the conventional gusset bag is prepared, the gusset material, which is an interposed member, cannot be set accurately and is not stable. Further, when the interposition member is set while the body members are overlapped, there is a problem that it is impossible to see what state the interposition member is in. Furthermore, there is a demand for an apparatus for flattening the bottom of the bag. However, the conventional technology cannot maintain the flat bottom and cannot flatten the bottom. was there.

  In view of such circumstances, the present invention provides a bag-making machine that forms a gusset bag with a simple structure. The bottom or head of the bag is folded flatly via a guide member at the bottom or head of the bag, and the folded bottom or head is formed. Furthermore, it aims at providing the apparatus which forms the open surface which presses down so that it may become flat reliably, the bottom part of a bag, the head forming apparatus, the manufacturing apparatus of a bag, the method of forming an open surface, and the manufacturing method of a gusset bag. .

  Furthermore, the manufacturing method of the gusset bag which has a high quality bottom part and can ensure high independence is provided.

In the present invention, in order to solve the above-mentioned problem, first, a bag bottom portion and a head forming device in a bag making machine for making a bag having a flat portion derived from a first web and a second web that are stacked one above the other. A device for forming an open surface on the side portions of the first web and the second web, the folding unit for folding the side portions of the first web and the second web in a flat state , respectively , A roller unit that presses the formed side portion against the bending unit, and the bending unit includes a guide member disposed on the center side from the side edges of the first web and the second web, and the longitudinal direction of the guide member. direction coincides with the transport direction of the first and second webs, and said guide member has a flat outer end face, the outer first and second webs of side from the outer end face of the guide member To are disposed vertically with a gap for passing by overhang, the roller unit is snugly respective sides passing overhang of the first and second webs to flat outer end surface of the guide member A roller that presses the guide member disposed on the upper side so as to form a flat open surface by bending the respective side portions vertically and vertically at the same time, An apparatus for forming an open surface is employed, which is provided with a roller that presses against a guide member disposed on the surface.

In the apparatus for forming the opening surface, the roller unit is provided at two locations along the conveying direction of the first web and the second web.
In the apparatus for forming the opening surface, the roller that presses the guide member disposed on the upper side and the roller that presses the guide member disposed on the lower side are arranged in the flow direction of the first web and the second web. It is characterized in that the angle formed with the horizontal plane can be freely changed so that it can be expanded along.

  2ndly, it is the bottom part in the manufacturing apparatus of a bag comprised from a plane part and a side part, and a head formation apparatus, Comprising: The said bag is a plane part derived from the 1st web and the 2nd web piled up and down, A bottom part of a bag, comprising a device for forming the above-mentioned opening surface, comprising a side part derived from an interposed member arranged between the first web and the second web Is adopted.

  3rdly, it is the manufacturing apparatus of the bag comprised from a plane part, a side part, and a bottom part, Comprising: The said bag is a 1st web derived from the 1st web and the 2nd web which were piled up and down, and a 1st web And the side part derived from the interposition member distribute | arranged between the 2nd web, and the bottom face part derived from the 4th web, The bottom part of the said bag, a head formation apparatus, a 1st web, and a 2nd web And a diverting roller for guiding the fourth web to be conveyed in the same direction as the conveying direction downstream of the bottom portion and the head forming device. It was adopted.

Fourth, the first web and the second web used in the bag forming method and the head forming step in the bag making method for making a bag having a flat portion derived from the first web and the second web superimposed one above the other. A method for forming an opening surface on a side portion of a web, wherein the side portions of the first web and the second web in a flat state are respectively outwardly exposed from the outer end surface of the guide member by using the apparatus for forming the opening surface. The first web and the second web are conveyed so as to pass through the gap between the guide members, and the projecting side portions of the first web and the second web are respectively fitted to the flat outer end surface of the guide member. A method of forming flat open surfaces on the side portions of the first web and the second web by pressing the respective side portions with a roller so as to be bent substantially vertically up and down at the same time. It was adopted.

  In the method of forming the opening surface, the opening surface is formed on both sides of the first web and the second web.

  Fifth, a gusset bag comprising a pair of plane portions, side portions connecting the side edges of these plane portions, and a bottom portion closing one end side of these plane portions and the side portions, and having an open top. The intervening member made of the third web constituting the side surface portion is placed on the first web at predetermined intervals in a direction orthogonal to the longitudinal direction of the first web constituting the first plane portion. The step of placing and the second web that constitutes the second flat surface portion are superposed on the first web on which the interposition member is placed, and at least the end portion of the interposition member in the axial direction of the interposition member The side part of the interposition member is formed integrally with the opening surface by the sealing step of sealing the center portion in the width direction with the first web and the second web facing the center portion and the method of forming the opening surface. Open face that forms a diamond-shaped folding surface A superimposing step, a step of superimposing the fourth web constituting the bottom surface portion on the open surface integrally formed with the rhombus folding surface, and an overlay of the fourth web on the open surface integrally forming the rhombus folding surface A step of closing the opening surface in a closed state, a step of sealing the opening surface integrally formed with a rhombus folding surface and the fourth web, and a position of the first web and the second web at the center position of the interposition member The method of manufacturing a gusset bag characterized by having a step of cutting in the width direction.

In the manufacturing method of the gusset bag, upstream of the step of placing the interposition member on the first web, a belt-like film material that is a third web is conveyed in the longitudinal direction while both sides of the film material are conveyed. The side edges of the film material are abutted gradually toward the center, and the abutted side edges are bonded together with tape along the abutting portion to form a continuous cylinder,
Next, the abutting portion between the side edges is positioned at the center in the width direction and both sides of the continuous cylinder are pressed to form a flat line so that fold lines are formed on both sides. An interposed member forming step of forming the interposed member by cutting the continuous cylinder into a predetermined length is provided.

As described above, according to the present invention, the following effects are obtained.
(1) When inserting an interposition member or the like into the bottom portion of the bag or the gusset portion of the head, it is flattened so that it can be easily inserted and set, and accurate positioning and insertion can be easily performed accurately.
(2) Since the intermediate member is inserted into the position where each layer of the body material (web) superimposed on the two layers is folded flat, bag formation is possible, so that the state of the intermediate member can be visually observed and positioned accurately You can always monitor whether or not.
(3) We can easily respond to continuous printing and length requirements for the size of the bag before processing it into a bag to a material that can be welded. Can be done in a simple work process.
(4) When forming the opening surface, the overlapped webs are bent so as to be opposite to each other, so that the conveyance distance from the closed state to the opening can be shortened. For this reason, an apparatus can be made compact.

The schematic front view of the bottom part and head formation apparatus concerning one Embodiment of this invention. FIG. 2 is a schematic plan view of the bottom and head forming device shown in FIG. 1. The schematic side view of the bottom part and head formation apparatus shown in FIG. The schematic front view which shows the bottom part which forms the bottom part of this invention, a head part, and the side gusset part, and the whole head formation apparatus. The schematic perspective view of the manufacturing apparatus of the bag which can be bag-made with the continuous work process of this invention. FIG. 6 is a schematic perspective view of a manufacturing apparatus according to an embodiment different from the manufacturing apparatus shown in FIG. 5. The perspective view of the process of forming a continuous cylinder. The figure which shows a process until a temporary seal | sticker part is formed after mounting an interposition member on a 1st web and overlapping a 2nd web. The schematic side view of a bottom part formation apparatus. The schematic plan view of a bottom part formation apparatus. The perspective view which shows the process of forming an open surface. The top view which shows the process in which an open surface is closed again. The perspective view of the process in which a 4th web is sent into an open surface. The perspective view of the process in which a 1st web-a 4th web are pressed. Explanatory drawing which shows the sealing position of an open surface and a 4th web. Explanatory drawing which shows the position cut | disconnected in order to form each gusset bag.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present invention folds the bottom or head of a bag gusset or the like flatly through a guide member and maintains the unfolded state, and presses the folded bottom or head to ensure flatness. The bottom part of the bag, which is provided with a pair of rollers that can change the angle on the upstream side and the downstream side of the bottom part and the head forming apparatus, and is flattened more securely by the pressing parts. A forming apparatus, and a bag manufacturing apparatus and method for forming a gusset bag using the apparatus.

  1-5 has shown the manufacturing apparatus of the bag concerning one Embodiment of this invention. First, the overall image will be schematically described with reference to FIGS.

  The present invention integrates as a weldable material a film made of a suitable polyolefin, in particular polyethylene or polypropylene, or a metal film, in particular an aluminum film, for example to produce a perfume packaging bag. Use composite film. Such a weldable material or a heat-sealable material is used as a bag material.

  First, as shown in FIG. 5, the lower web 1, which is a flat belt-shaped first web material, passes through an apparatus (not shown) for forming a bag from a weldable material such as a plastic film, It is conveyed in the direction of arrow 2 in a state of being horizontally arranged. This bag forms a folding interposition member such as a gusset portion in the process according to the present invention. On the other hand, the flat upper web 3 that is the second web material is conveyed above the lower web 1 in parallel with the lower web. And the conveyance direction of the said upper side web 3 is changed toward the upper surface of the lower side web 1 by the direction change roller 4 distribute | arranged to the predetermined position. Next, the sheet is redirected by the deflecting roller 5 disposed in the immediate vicinity of the upper web 3 so as to be conveyed again in the same direction as the lower web 1 and overlapped with the lower web 1. Thereafter, both the webs 1 and 3 are flatly overlapped and conveyed in the conveying direction 2.

Further, the interposition member 6 configured as a side surface portion of the gusset bag is conveyed in the direction of the arrow 7 toward the lower web 1 in a direction transverse to the conveying direction 2, preferably in a right angle direction. In this case, the interposition member 6 is transported from the lower transport plane to an upper transport plane that forms the same plane as the lower web 1 via a turning roller (not shown). In the upper transport plane, the interposition member 6 is folded to form a gusset. In the illustrated embodiment, the gusset portion is formed as a double-side folded web 9 in the shape of a flat tube 6 ′ with side folding edges 11 located on opposite sides. Side portions 12 of the intervening member 6 that are folded together along both folding edges 11 to form this flat tube 6 'are advantageously in the region of the vertical longitudinal central plane of the flat tube 6'. Are joined together by overlapping or by supplying a separate film to the adjacent end face.

  Both side folding sections 12 as flat tube sections are cut from both side folding webs 9 by a transverse cutting device (not shown) comprising an upper tool and a lower tool. Both side folding sections 12 are conveyed by suitable conveying means (not shown) having one roller pair.

  The both side folding sections 12 are sealed at positions where the end portions leave the end portions 8 of the lower web 1 as illustrated. Depending on the web passing method, the upper web 3 is sealed.

  In addition, the interposition member 6 forms a bottom portion and a head portion by inserting the inner web 6 into the lower web 1 and the end portions 8 of the upper web 3 slightly inside as shown in the figure. The web 3 is unfolded and flattened while being bent, and at the same time, it is extremely easy to form the corner folding hexagonal portion 13.

  The flat fourth web 16 used to form the bottom of the bag is fed in the same direction as the arrow 2 along the half web between the lower web 1 and the upper web 3. The fourth web 16 is overlaid by the corner folding hexagonal portion 13 having the open end.

  Next, the bag bottom and head forming device of the present invention will be described in detail with reference to FIGS.

As described above, the lower web 1 and the upper web 3 flow from the left side to the right side, and the lower web 1 and the upper web 3 are transferred from the left side upstream in a two-layer manner as a body material. In the bag manufacturing apparatus, the both side folded webs 9 and the fourth web 16 forming the bottom and the head are folded while being spread between the lower web 1 and the upper web 3 by a guide or the like not shown. A flat guide member that is bent and guided by a tool, provided on the top and bottom, an upstream pressing tool 33 that is provided with a rubber roller whose angle can be changed up and down, and a downstream that is provided with a rubber roller that is also capable of changing the angle up and down. The side presser 34 is flattened by the upstream and downstream side pressers 33 and 34 having rubber rollers so that the bottom or head of the bag can be pulled up and down while folding, so that the interposition member can be easily inserted.

  While the lower web 1 and the upper web 3 are bent by a bending tool or the like, the lower web 1 and the upper web 3 are transferred to the position of a flat guide member 31 attached to the frame 32, and are composed of rubber rollers while being bent using the flat guide member 31 as a guide. By the upstream presser 33, the lower web 1 and the upper web 3 are guided and folded while being pressed and brought into contact with the flat guide member 31 exactly. At this time, the upstream pressing member 33 made of a rubber roller can be freely changed in angle, and can be expanded (90 degrees or less) along the flow direction of the lower web 1 and the upper web 3. ing. In this configuration, the angle is changed depending on the material of the lower web 1 and the upper web 3, and the like can be reliably folded.

  Thereafter, the lower web 1 and the upper web 3 that are flattened at the position of the guide member 31 or the bottom web, or downstream so as to maintain the flat state so that it can be easily performed when inserting the interposition member into the head gusset. Also on the side, a downstream presser 34 having a rubber roller that can freely change the same angle as the upstream side is provided. In addition, you may provide the presser guide member 37 in the edge part of the guide member 31 so that the upstream and downstream pressers 33 and 34 which have a rubber roller may be opposed.

  Further, the upstream and downstream presser position adjusting members 35 and 36 are adjustable so that the rubber rollers of the upstream and downstream pressers 33 and 34 and the presser guide member of the guide member 31 are in pressure contact with each other. Is provided.

  FIGS. 6-16 has shown embodiment of the manufacturing apparatus and manufacturing method which form two gusset bags in parallel in the width direction of the 1st web 51 and the 2nd web 53 which are conveyed.

  First, with reference to FIG. 6, the outline of the manufacturing method of a gusset bag is demonstrated. In this manufacturing method, the belt-shaped first web 51 configured as one plane of the gusset bag is horizontally disposed and conveyed in the longitudinal direction thereof. The interposition member 59 is sequentially fed into the upper surface of the first web 51 being conveyed from the side of the first web 51 at predetermined intervals in the longitudinal direction of the first web 51. As is clear from FIG. 6, the interposition member 59 is fed in a direction orthogonal to the longitudinal direction of the first web 51 and placed on the upper surface of the first web 51. This interposition member 59 is comprised as a side part of the completed gusset bag.

  On the other hand, above the first web 51, a belt-like second web 53 configured as the other flat portion of the gusset bag is parallel to the first web 51 and in the same direction as the transport direction of the first web 51. Being transported. The direction of the second web 53 is changed toward the upper surface of the first web 51 by the turning roller 54 at the downstream side of the step of placing the interposition member 59 on the first web 51. Thereafter, the second web 53 is turned by a turning roller 55 disposed in the immediate vicinity of the first web 51, conveyed again in the same direction as the first web 51, and overlapped with the first web 51.

  Thereafter, the first web 51 and the second web 53 that are overlapped with the interposition member 59 interposed therebetween are fed into the bag bottom forming device 80. The first web 51 and the second web 53 fed into the bottom forming device 80 are bent so that both side portions 51a and 53a are directed to the opposite sides, and an open surface 61 is formed on the side portion. That is, the first web 51 disposed on the lower side is bent at a right angle so that both side portions 51a face downward, while the second web 53 disposed on the upper side has both side portions 53a on the lower side. It is bent at a right angle. Portions 51 a and 53 a where the first web 51 and the second web 53 are bent are the opening surfaces 61. After the opening surfaces 61 are formed on both sides, a belt-like fourth web 63 is fed into the opening surfaces 61 from both sides of the first web 51 and the second web 53. The fourth web 63 is a member configured as a bottom surface portion of the gusset bag, and is superposed on the opening surface 61 when fed into the opening surface 61. Thereafter, the first web 51 and the second web 53 are folded in half so as to sandwich the fourth web 63, and the opening surface 61 is closed again.

  After the above steps, the interposed member 59 and the second web 53 are heat-sealed at the center line portion L2 in the width direction of the interposed member 59, and the fourth web 63 and the periphery of the opening surface 61 are heat-sealed. Is done. Thereafter, the first web 51, the second web 53, the interposed member 59 and the fourth web 63 are cut at the position of the center line L1 of the interposed member 59, and the first web 51, the second web 53 and the interposed member 59 are The first web 51 is separated at the center L2 in the width direction. By going through such a process, a plurality of open upper gusset bags are formed.

  The detail of each process of the manufacturing method of this gusset bag is demonstrated below.

FIG. 7 is a step of forming the interposition member 59 configured as a side surface portion of the gusset bag. The interposition member 59 is formed from a strip-shaped sheet material 58a . The belt-like sheet material 58a is conveyed in the longitudinal direction, and is folded so that both side edges 57 and 57 of the sheet material 58a are abutted with each other at the predetermined position. At the position where the sheet material 58a is folded, a roller 70 disposed at the center in the width direction of the sheet material 58a , and bending rods 71 and 71 extending toward the center from both sides of the sheet material 58a slightly downstream of the roller 70, It is provided between the tips of the bent rod 71, a guide 72 extending in the conveying direction of the sheet material 58a is provided at the center position of the sheet material 58a.

The roller 70 guides the sheet material 58a in the longitudinal direction while sinking the central portion of the conveyed sheet material 58a , and assists the side edges 57 and 57 to be folded. The bending rods 71 and 71 have their tips 71a and 71a curved in the shape of a fishhook. The curved ends 71a and 71a support the back surface of the sheet material 58a and bend the side edges 57 and 57 toward the center. Yes. Both side edges 57 and 57 of the sheet material 58a folded by the bending rods 71 and 71 are gradually folded while being in contact with the guide 72 disposed at the center, thereby forming a continuous cylinder 56.

  On the downstream side of this portion, there is provided a roller unit that presses the continuous cylinder 56 up and down to form it flat. The roller unit includes support shafts 74 and 74 extending from both sides of the continuous cylindrical body 56 toward the center, and rubber rollers 75 and 75 that are rotatably attached to the tips of the support shafts 74 and 74, respectively. Yes. The rubber rollers 75 and 75 press both sides of the continuous cylinder 56 toward the support surface of the continuous cylinder 56 from above, and fold lines 58 and 58 are formed on both side edges of the continuous cylinder 56. .

  After the fold lines 58 and 58 are formed on both side edges, the butted portion 56 a of the continuous cylinder 56 is bonded by the adhesive tape 76. The adhesive tape 76 is fed out from above the continuous cylinder 56 toward the abutting portion 56a located at the center of the continuous cylinder 56 at a predetermined angle with the transport direction. A roller 77 that is in contact with the upper surface of the continuous cylinder 56 is disposed at the center position in the width direction of the continuous cylinder 56. The fed adhesive tape 76 is pressed against the abutting portion 56a by the roller 77. Pasted.

  Thereafter, the continuous cylinder 56 is sequentially cut for each predetermined length in the longitudinal direction, and a plurality of interposition members 59 used for the side members of the gusset bag are formed. The length of the interposition member 59 is formed slightly shorter than the width of the first web 51 and the second web 53.

  As shown in FIG. 8, the interposition member 59 is sequentially placed on the upper surface of the first web 51 with the axial direction thereof being directed to the width direction of the first web 51. At this time, the both ends of the interposition member 59 are placed so as to be located slightly inside the both side edges of the first web 51. After the interposition member 59 is placed on the first web 51, the second web 53 is then superimposed on the first web 51 with the interposition member 59 interposed therebetween. Thereafter, both ends of the interposition member 59 are heat-sealed at the center in the width direction with the first web and the second web 53 to form temporary seal portions P and P.

  Thereafter, these members are sent to the bottom forming device 80. As shown in FIGS. 9 and 10, the bottom forming device 80 is composed of two symmetrical units 81, 81 arranged on both sides of the member to be fed. Each unit 81 includes a folding unit 82 that bends the side edges of the first web 51 and the second web 53 that are fed, and a roller unit 90 that presses the edges of the folded webs 51 and 53 against the bending unit 82. It is configured.

The bending unit 82 has rectangular block-shaped guide members 84, 84 arranged vertically with a predetermined gap, and an L-shape attached to the upper surface of the upper guide member 84 and the lower surface of the lower guide member 84. Presser guide members 85 and 85. The guide members 84, 84 are installed with the longitudinal direction thereof aligned with the conveying direction 52 of the first web 51 and the second web 53, slightly on the center side from both side edges of the first web 51 and the second web 53 to be fed. Has been. And the 1st web 51 , the 2nd web 53 , and the interposition member 59 as a member sent in are conveyed between the both guide members 84 and 84 distribute | arranged up and down. Further, the presser guide members 85 and 85 formed in an L shape are such that one portion 85a and 85a is substantially flush with the outer end surfaces of the guide members 84 and 84, and the other portion 85b and 85b is a guide. It is being fixed to the upper surface or lower surface of the members 84 and 84, respectively.

  On the other hand, the roller unit 90 is attached to the stand part 91 via a stand part 91 supported by the base 83 so as to extend up and down, and attachment tools 92, 92 so as to extend horizontally from the stand part 91. It is comprised from the two support arms 93 and 93 and the rollers 94 and 94 rotatably attached to the front-end | tip of each support arm 93 and 93. FIG. The stand portion 91 is arranged at a position away from the arrangement position of the guide members 84, 84 by a predetermined distance outward. In the stand portion 91, an attachment groove 91a to which the attachment tools 92, 92 are attached so as to be movable up and down is formed to extend vertically. And each support arm 93 and 93 is each attached so that it may extend toward the up-and-down holding | suppressing tool guide members 85 and 85 from the attachment tools 92 and 92 attached to the upper side and lower side of this stand part 91, respectively. .

  Each attachment device 92, 92 is provided with a fastening screw 92a with a handle, and this fastening screw 92a is inserted into the attachment groove 91a and attached to the stand portion 91. Further, through holes are formed in the attachment devices 92, 92 so as to extend in a direction perpendicular to the fastening screws 92a, and base portions of the support arms 93, 93 are inserted and attached to the through holes. In addition, the said attachment implements 92 and 92 are comprised so that position movement can be carried out up and down along the attachment groove | channel 91a formed in the stand part 91 by loosening the clamping screw 92a. The tightening screw 92a also functions as a fixing means for the support arms 93, 93 inserted into the through holes, and the length of the support arms 93, 93 can be freely adjusted by loosening the tightening screw 92a. Has been.

The front ends of the support arms 93 and 93 attached to the attachment devices 92 and 92 are directed to the presser guide members 85 and 85. The support arm 93 attached to the upper side of the stand portion 91 abuts the outer peripheral surface of the roller 94 attached to the tip of the support portion 93 against the upper presser guide member 85, while being attached to the lower side. 93 has the outer peripheral surface of the roller 94 attached to the tip thereof abutted against the lower pressing member guide member 85.

  Since the support arms 93 and 93 can be freely moved with respect to the through-holes of the attachment devices 92 and 92, the outer peripheral surfaces of the rollers 94 and 94 abut against the guide members 85 and 85 with appropriate pressure. The length is adjusted so that it touches. In addition, the angle between the rollers 94 and 94 and the horizontal plane is appropriately adjusted so that the first web 51 and the second web 53 are smoothly bent and passed.

The 1st web 51 , the 2nd web 53 , and the interposed member 59 as a member sent into the bottom part formation apparatus 80 provided with the above structure operate | move as follows.

The first web 51 and the second web 53 integrated with each other via the interposition member 59 are fed through a gap formed between the upper guide member 84 and the lower guide member 84. . As shown in FIG. 11, the portions 51 a and 53 a projecting outward from the outer end surfaces of the guide members 84 and 84 of the first web 51 and the second web 53 gradually move up and down on the upstream side of the guide members 84 and 84. It can be bent. The first web 51 is bent at a substantially right angle toward the lower side , and the upper end of the first web 51 is sandwiched and conveyed between the roller 94 and the presser guide member 85, while the second web 53 is at a substantially right angle toward the upper side. The lower end is sandwiched between the roller 94 and the pressing member guide member 85 and conveyed. Thereby, the opening surface 61 is formed in the both sides of the member sent into the bottom part formation apparatus 80. FIG.

  In the step of forming the opening surface 61, the first web 51 and the second web 53 are bent in opposite directions, and rhombus folding surfaces 62 are formed on both side edges of the interposition member 59. The folding surface 62 includes a predetermined base point on folding lines 58 and 58 formed on both side edges of the interposition member 59, an end edge of the seal portion between the interposition member 59 and the first web 51, and the interposition member 59 and the first end. 2 Lines that obliquely connect the edge of the seal portion with the web 53 are set as base lines, and the outer sides thereof are folded inward. And this part is formed integrally with the side part of the 1st web and the side part of the 2nd web which were opened flat, and the above-mentioned opening surface 61 is formed.

In the conventional method, a flat open surface is formed between the first web and the second web by folding back only the second web toward the center. In the conventional method, there is a large difference between the distance of the trajectory through which the side portion passes and the distance of the trajectory through which the central portion passes until the side portion of the second web is completely folded back. For this reason, when the second web is folded in a short section in the transport direction, it is affected by the difference in distance, and a shift occurs in the longitudinal direction between the folded side and center. In order to prevent this inconvenience, the method of folding only the second web is folded over a long distance in the transport direction. For this reason, the conventional method requires a wide space for forming the opening surface.

In contrast, in the bottom forming device 80 and the method using the same in the present embodiment, the first web 51 and the second web 53 are bent at substantially right angles to form the opening surface 61 . For this reason, from the state where the side edge of the first web 51 and the side edge of the second web 53 are flatly overlapped, the distance of the trajectory through which the side portion passes and the passage of the center portion are formed. The difference from the distance of the trajectory to be reduced can be reduced, and the opening surface 61 can be formed in a short section.

In this way, the first web 51 and the second web 53 that are integrally formed via the interposition member 59 have the state in which the opening surface 61 is formed and the folding surface 62 is formed integrally with the opening surface 61. Passing through the bottom forming device 80 while maintaining. While the 1st web 51 and the 2nd web 53 pass the bottom part formation apparatus 80, as shown in FIGS. 12-14, the 4th web 63 comprised as a bottom face part of a gusset bag is opened from both sides as shown in FIG. Then, the opening surface 61 is closed again. The fourth web 63 is a belt-like sheet material whose width is approximately the same as the width of the opening surface 61.

  The fourth web 63 is transported from a direction substantially perpendicular to the transport direction 52 of the first web 51 and the second web 53 being transported, and is sent in the immediate vicinity of the opening surface 61. Near the opening surface 61, there is provided a turning roller 64 that changes the conveying direction of the fourth web 63. The fourth web 63 is guided by the turning roller 64 and is guided by the first web 51 and the first web 51. 2 The web 53 is conveyed in the same direction as the conveyance direction 52. Accordingly, the fourth web 63 is overlapped with the opening surface 61.

  After the fourth web 63 and the opening surface 61 are overlapped, the opening surface 61 is closed again by the guide plate 102 disposed on the outer side of the fourth web 63. The guide plate 102 is arranged on both sides of the first web 51 and the second web 53 on the downstream side of the inspection process so as to be parallel to the webs 51 and 53. The guide plate 102 has an oblique side in which a predetermined portion 102a on the upstream side is inclined toward the center side of the first web 51 and the second web 53 with respect to the inner portion of the fourth web 63 facing the overlapping opening surface 61. Is formed. The oblique side portion 102a abuts on the center of the opening surface 61 of the first web 51 and the second web 53 to be conveyed, and gradually pushes the center of the opening surface 61 toward the center in the width direction of the first web 51. The opening surface 61 is closed again when its center is pushed toward the center of the web by the guide plate 102.

After the opening surface 61 is closed, the first web 51 , the second web 53 , the interposition member 59 , and the fourth web 63 are entirely pressed up and down by rollers (see FIG. 14). In this pressing step, the main roller 103 disposed in a direction orthogonal to the conveying direction 52 and the open surface 61 closed from both sides of the first web 51 and the second web 53 extend to the main roller 103 therebetween. The auxiliary roller 105 is disposed between the front and rear of the conveyance direction 52. The main roller 103 is an elongated cylindrical roller 104 or 104 arranged above and below the first web 51 , the second web 53 , the interposition member 59 , and the fourth web 63 to be conveyed. The entire width direction of the web 53 is pressed up and down.

  On the other hand, the auxiliary roller 105 includes a support shaft 106 that extends from the sides of the first web 51 and the second web 53 to the side edges thereof, and a roller 107 that is rotatably attached to the tip of the support shaft 106. Has been. The auxiliary rollers 105 are arranged at four locations on the both sides of the first web 51 and the second web 53, in front of and behind the main roller 103, and in each arrangement position, a pair of members to be conveyed are sandwiched between them. Is provided. These auxiliary rollers 105 concentrate and press both sides of the web corresponding to the closed opening surface 61. In addition to the first web 51 and the second web 53, the interposition member 59 and the fourth web 63 are overlapped at a position corresponding to the opening surface 61, and it is difficult to press flatly compared to the central portion. . In addition to the main roller 103, these auxiliary rollers 105 are used to press the portion corresponding to the open surface 61 that is closed, thereby forming the member flatly very effectively.

  The auxiliary roller 105 is configured to be able to change the angle with respect to the transport direction 52. In this embodiment, the auxiliary roller 105 disposed on the upstream side of the main roller 103 is installed with the downstream portion thereof being inclined toward the outside, while the auxiliary roller disposed on the downstream side of the main roller 103. 105 is installed in a direction parallel to the transport direction 52. The auxiliary roller 105 disposed on the upstream side of the main roller 103 is installed so as to incline outward, thereby exerting an action of spreading both sides of the web corresponding to the closed opening surface 61 outward.

After passing through this pressing step, the intermediate portion in the axial direction of the interposed member 59 that has not been sealed is heat-sealed along the center line with the first web and the second web 53, and the opening surface 61 and the fourth web 63 are also sealed. And are sealed. In addition, as shown in FIG. 15, the opening surface 61 and the 4th web 63 are the lines which connect the top parts of the folding surface 62 in which the interposition member 59 was formed in the rhombus regarding the 1st web 51 and the 2nd web 53. The fourth web 63 is sealed at the positions 61a and 61a. Further, the interposition member 59 and the fourth web 63 are sealed at portions 62a... 62a where the edges of the interposition member 59 face each other at the center of the folding surface 62 formed in a rhombus. This rectangularly sealed portion is configured as the bottom surface of the gusset bag.

After that, as shown in FIG. 16, the width direction center L1 of the first web 51 and the second web 53 is cut along the longitudinal direction of the first web 51 and the second web 53, and the interposition members 59. The first web 51 and the second web 53 are cut in the width direction at the center positions L2... L2. And an excess part is cut out and a gusset bag is formed. The gusset bag thus formed is composed of a pair of opposed flat portions, side portions connecting the side edges of the flat portions, and a bottom portion closing one end of the flat portions and the side portions. The gusset bag is open at the top.

  As described above, the bag having the bottom portion, the head portion, and the side gusset portion includes two layers of a lower web and an upper web, which are a body made of a plastic film, paper, aluminum foil, or a laminate material obtained by combining these. And the intermediate member is inserted between the lower web and the upper web of the two layers, and the lower web, the upper web, and the intermediate member are heat-sealed along the longitudinal center line to obtain the intermediate member. Form a bag with. The present invention is a forming apparatus for flatly folding the bottom or head of the bag, and a continuous working process that makes it easy to insert the interposition member by folding the bottom or head flat. A bag manufacturing apparatus for manufacturing a bag having a bottom part, a head part, a side gusset part, and the like, and a manufacturing method using the bag manufacturing apparatus.

1 Lower web (body)
3 Upper web (body)
4, 5 Turning roller 6 Intervening member (flat tube)
8 End 9 Both side folding web
11 Both folding edges 12 Both side folding sections 13 Hexagonal portion 16 Fourth web 31 Guide member 32 Frame 33, 34 Presser 35, 36 Position adjustment member 37 Presser guide member 51 First web 53 Second web 56 Continuous cylinder Body 59 Interposing member 61 Opening surface 62 Folding surface 63 Fourth web 70 Roller 71 Guide rod 72 Support member 75 Rubber roller 76 Adhesive tape 77 Roller 80 Bottom forming device 84 Guide member 85 Presser guide member 91 Stand unit 92 Mounting device 94 Roller 102 Guide plate 103 Main roller 105 Auxiliary roller

Claims (9)

The bottom of the bag in the bag making machine for making a bag having a flat portion derived from the first web and the second web superimposed on the top and bottom, the side of the first web and the second web provided in the head forming device An apparatus for forming an open surface in a part,
A folding unit for folding the side portions of the first web and the second web in a flat state, and a roller unit for pressing the folded side portions against the folding unit,
The bending unit has a guide member disposed closer to the center side than the side edges of the first web and the second web, and the longitudinal direction of the guide member coincides with the conveying direction of the first web and the second web, And the said guide member has a flat outer end surface, and is arrange | positioned up and down with the clearance gap which makes the side part of a 1st web and a 2nd web protrude outward from the outer end surface of a guide member, and to pass through. And
The roller unit is configured to press and contact each side portion of the first web and the second web that protrude and pass along the flat outer end surface of the guide member , thereby simultaneously bringing the respective side portions into contact with each other. A roller that presses against the guide member disposed on the upper side and a roller that presses against the guide member disposed on the lower side so as to be bent substantially vertically up and down to form a flat opening surface. A device for forming a characteristic opening surface.   The apparatus for forming an opening surface according to claim 1, wherein the roller unit is provided at two locations along the conveying direction of the first web and the second web. The roller that presses against the guide member disposed on the upper side and the roller that presses on the guide member disposed on the lower side can be expanded along the flow direction of the first web and the second web. The apparatus for forming an open surface according to claim 1, wherein an angle formed between and can be freely changed. A bottom part in a bag manufacturing apparatus composed of a flat part and a side part, a head forming apparatus,
The bag is composed of a flat surface portion derived from the first web and the second web that are superposed on each other, and a side surface portion derived from an interposition member disposed between the first web and the second web,
An apparatus for forming an opening surface according to any one of claims 1 to 3, comprising a bottom portion of a bag and a head forming device. A bag manufacturing apparatus comprising a plane part, a side part and a bottom part,
The bag is a flat surface portion derived from the first web and the second web that are superposed on each other, a side surface portion derived from an interposition member disposed between the first web and the second web, and
A bottom part derived from the fourth web,
The bottom of the bag according to claim 4, a head forming device,
A diverting roller for guiding the fourth web to be conveyed in the same direction as the conveying direction downstream of the bottom portion and the head forming device in the conveying direction of the first web and the second web. Characteristic bag manufacturing equipment. Side portions of the first web and the second web used in the bag forming method and the head forming step in the bag making method for making a bag having a flat portion derived from the first web and the second web superimposed on each other. A method of forming an open surface in
With the device according to claim 1,
The first web and the second web are conveyed so that the sides of the first web and the second web in a flat state protrude outward from the outer end surface of the guide member and pass through the gap of the guide member,
By pressing and contacting the protruding side portions of the first web and the second web so as to be exactly along the flat outer end surface of the guide member, the respective side portions are simultaneously bent up and down substantially vertically. A method of forming flat open surfaces on the sides of the first web and the second web by pressing with a roller . The method of forming an open surface according to claim 6, wherein open surfaces are formed on both sides of the first web and the second web. A method of manufacturing a gusset bag comprising a pair of flat portions, side portions connecting side edges of the flat portions, and bottom portions closing one end of the flat portions and the side portions. There,
Placing the interposition member made of the third web constituting the side portion on the first web at predetermined intervals in a direction orthogonal to the longitudinal direction of the first web constituting the first plane portion;
On the first web on which the interposition member is placed, the second web constituting the second flat surface portion is overlaid, and at least the end in the axial direction of the interposition member is centered in the width direction of the interposition member. A sealing step for sealing each of the first web and the second web facing the central portion;
An opening surface forming step of forming a rhomboid folding surface formed of a side edge of the interposition member integrally with the opening surface by the method of forming the opening surface according to claim 6 or 7,
A step of superimposing a fourth web constituting the bottom portion on the open surface formed integrally with the rhombus folding surface;
Closing the open surface in a state where the fourth web is superimposed on the open surface formed integrally with the rhombus folding surface;
Sealing the open surface integrally formed with the rhombus folding surface and the fourth web;
Cutting in the width direction of the first web and the second web at the center position of the interposition member;
A method for producing a gusset bag, comprising: Upstream of the step of placing the interposition member on the first web,
While the belt-like film material which is the third web is conveyed in the longitudinal direction, the side edges of the film material are butt-matched by gradually bending toward both sides of the film material, and the butt-side edges are butt-matched. Pasted together with tape to form a continuous cylinder,
Next, the abutting portion between the side edges is positioned at the center in the width direction, and both sides of the continuous cylinder are pressed, and are formed flat so that fold lines are formed on both sides.
Then, by cutting the flat continuous cylinder into a predetermined length,
The method for producing a gusset bag according to claim 8, further comprising an interposition member forming step for forming the interposition member.

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