JP5555500B2 - Cutting unit - Google Patents

Description

  The present invention relates to a cutting unit mounted on a bag making apparatus or the like for making a pouch container made of a plastic film, for example.

  As a pouch container made of plastic film, for example, as shown in FIGS. 9A to 9C and FIG. 10, top gussets are provided at the upper and lower ends of the body P1 whose side edges are heat-sealed with a predetermined width. There is a pouch container SP with a spout on which a spout S is attached to a top gusset part P2 of the pouch P in which a part P2 and a bottom gusset part P3 are respectively formed, and the pouch P has both side edges of an upper end part and a lower end part of the trunk part P1. The top gusset sheet forming the top gusset portion P2 is not heat-sealed with each other, and the top gusset sheet is heat-sealed to the periphery of the upper end of the body portion P1 that is folded outward. The bottom gusset sheet forming the part P3 is folded inward from the lower side of the body part P1, and its peripheral part is the periphery of the lower end part of the body part P1. It is heat-sealed to. Further, as shown in FIG. 9 (b), notches c that match each other in a folded state are formed on both side edges of the bottom gusset sheet. Both side edges at the lower end of P1 are partially heat sealed.

  The bag making apparatus for making the pouch container SP with a spout uses a pouch container SP with a spout by using both side portions of the center line in the width direction of the packaging material M while feeding the long strip-shaped packaging material M. As shown in FIG. 11, the packaging material M is unrolled from a packaging material roll R formed by winding a long belt-shaped packaging material M formed of a synthetic resin sheet into a roll shape. In the portion corresponding to the top gusset portion P2 of the pouch P in the packaging material delivery portion 61 for sending out, the crease line forming portion 62 for forming a crease line in the delivered packaging material M, and the packaging material M in which the crease line is formed. A spout mounting hole is formed, and a hole forming part 63 for forming a notch part forming hole serving as a notch part c (see FIG. 9B) in a part corresponding to the bottom gusset part P3, and the delivery direction of the packaging material M are Facing the width direction of the pouch P Thus, the folding part 64 which folds the packaging material M in the width direction, and the spout mounting part which mounts the spout S in the spout mounting hole part formed in the part corresponding to the top gusset part P2 in the folded packaging material M 65, a first seal portion 66 for heat-sealing a portion corresponding to the periphery of the top gusset portion P2 in the pouch P and a portion corresponding to the upper edge of the trunk portion P1 with a predetermined width, and the packaging material M in the width direction The first cutting part 67 that is divided into two parts and the part corresponding to the side edge of the body part P1 in the pouch P are heat-sealed with a predetermined width, and the part corresponding to the peripheral edge of the bottom gusset part P3 and the lower end part of the body part P1 A second seal portion 68 for heat-sealing a portion corresponding to the peripheral edge with a predetermined width, and a heat-sealed portion with a predetermined width formed in a portion corresponding to the side edge of the body portion P1 in the pouch P are cut. In, and a second cutting portion 69 to separate the individual spouted pouch package SP.

  Hereinafter, the bag making process of the pouch container SP with a spout by the bag making apparatus 60 described above will be described. After a plurality of crease lines are formed in the crease line forming part 62 in the wrapping material M sent from the wrapping material sending part 61, a spout mounting hole and a notch part forming hole are sequentially formed in the hole forming part 63, Subsequently, in the folding portion 64, the packaging material M is arranged in the width direction along each fold line so that portions corresponding to the trunk portion P1, the top gusset portion P2, and the bottom gusset portion P3 of the pouch P are formed. Folded.

  The packaging material M folded in this manner has its both side portions raised at the spout mounting portion 65, and the main body portion S1 of the spout S is inserted into a spout mounting hole formed in a portion corresponding to the top gusset portion P2. After the flange portion S2 is heat-sealed to the periphery of the spout mounting hole in the top gusset portion P2, the portion corresponding to the top gusset portion P2 to which the spout S is mounted is folded over the central portion in the width direction of the packaging material M. It is done.

  Subsequently, the first seal portion 66 is sandwiched between the seal members 66a and 66a, so that a portion corresponding to the peripheral edge of the top gusset portion P2 in the pouch P and a portion corresponding to the upper edge of the trunk portion P1 have a predetermined width. After being heat-sealed into a substantially octagonal shape, the heat-sealed portion is cooled, and as shown in FIGS. 12A and 12B, the portion corresponding to the top gusset portion P2 has a substantially octagonal shape. Unnecessary parts are excised. A shaded display portion in FIG. 12A indicates a heat seal portion.

  After that, after the packaging material M is cut at the center line CL in the first cutting part 67, the top gusset part to which the spout S is attached as shown in FIG. The portion corresponding to P2 is folded so as to stand up, and as shown in FIG. 14 (b), by sandwiching it between the sealing members 68a and 68a so as to include the folded portion, as shown in FIG. The parts corresponding to the side edges of the body part P1 are heat-sealed with a predetermined width, and the part corresponding to the periphery of the bottom gusset part P3 and the part corresponding to the periphery of the lower end part of the body part P1 are heat-sealed with a predetermined width. Then, the heat seal portion is cooled, and unnecessary portions are cut out so that the portion corresponding to the lower end corner portion of the bottom gusset portion P3 has an R shape. In addition, the shaded display part in FIG. 14 has shown the heat seal part.

  Finally, in the second cutting portion 69, when a heat seal portion having a predetermined width formed at a portion corresponding to the side edge of the body portion P1 in the pouch P is cut at a position indicated by a one-dot chain line in FIG. As shown, the pouch container SP with spout is completed with the pouch P folded so that the top gusset portion P2 faces the front. The shaded display portion in FIG. 15 indicates the heat seal portion.

International Publication No. 2008/096392 Pamphlet

  However, in the second cutting portion 69, when the heat sealing portion having a predetermined width formed in the portion corresponding to the side edge of the body portion P1 in the pouch P is cut, if the cutting position is slightly shifted, FIG. ) And (b), there is a problem that burrs B are generated at the R-shaped lower end corner portion of the bottom gusset portion P3 in one of the pouches P. In FIG. 6A, the alternate long and short dash line indicates the normal cutting position, and the two-dot chain line indicates the actual cutting position where the position is shifted.

  In order to solve such a burr problem, the cutter of the second cutting part 69 is moved slightly in the conveying direction of the packaging material M, or the packaging material M is moved slightly, before and after the original cutting position. It is conceivable that the cut portion is cut with a predetermined width by cutting two places or by punching with a punching die set. However, in the former method, the cutting operation must be performed twice. As a result, there are new problems such as high speed operation of the bag making apparatus and complicated bag making apparatus itself, leading to cost increase. Since the material M and the spout S (pouch container SP with a spout) are disposed in the traveling space, adhesion of dust and oil to the packaging material M and spout S (pouch container SP with a spout) and deterioration of maintainability , Mold change work is complicated With a new problem occurs that it becomes, there or worn blade cutting die even partially, when or chipped, said can not be excised, punching die set also specific problems. In particular, the attachment of dust or the like to the packaging material M or the spout S (pouch container SP with spout) is a major problem in the case of food or medical packaging or aseptic filling packaging.

  Accordingly, an object of the present invention is to provide a cutting unit capable of preventing the generation of burrs without cutting twice or punching using a punching die set as described above.

In order to solve the above problems, the invention according to claim 1 is mounted in a bag making apparatus for making a pouch container having a corner portion formed in an R shape, and a portion corresponding to the corner portion is formed in an R shape. A cutting unit for cutting a pouch container in which an unnecessary portion is cut away and a portion corresponding to one corner portion and a portion corresponding to the other corner portion are connected to each other in an adjacent state, and having a shearing blade A pair of outer blades provided with an operation portion in series, an inner blade provided between a pair of outer blades and a blade portion having a shearing blade sandwiched between the pair of outer blades, the blade portion, and the operation portion A scissor unit having a pair of the outer blade and a support shaft that rotatably supports the inner blade, and the operation portion of the outer blade and the operation portion of the inner blade. And an opening / closing drive mechanism for opening / closing the scissor unit. With shear blade having a shearing blade to the blade portions of the pair of the outer cutter are respectively attached to the rear end surface of each shearing blade, a shutter having flexibility overhanging passage side of the blade portion of the inner cutter When the pieces are fixed and the scissor unit is closed, the front end of the blade part of the inner blade is configured to push the shutter piece and project to the rear side of the shear blade of the outer blade . A cutting unit is provided that cuts so that a boundary line between adjacent pouch containers is positioned between a pair of outer blades.

As described above, the cutting unit according to the first aspect of the invention has a pair of outer blades and an inner blade sandwiched between the pair of outer blades, so that the portion corresponding to the corner portion has an R shape. Unnecessary portions are cut out so that a portion corresponding to one corner portion and a portion corresponding to the other corner portion are adjacent to each other, and a boundary line between adjacent pouch containers is a pair. Since cutting is performed so as to be positioned between the shearing blades of the outer blade , burrs are not generated in the R-shaped corner portion of the cut-out pouch container , and a small interval (a pair of outer edges is removed by one cutting operation). It is possible to simultaneously cut two places where the gap between the blades is opened, without hindering the high-speed operation of the bag making apparatus, and the bag making apparatus itself to be mounted is not complicated.

  When this cutting unit is mounted on a bag making apparatus, the outer blade and inner blade operation portions of the scissor unit and the opening / closing drive mechanism for opening and closing the scissor unit can be disposed outside the travel space of the packaging material. Therefore, it is difficult for dust and oil to adhere to the packaging material, which is particularly effective for food and medical packaging and aseptic filling and packaging devices.

  In addition, this cutting unit is simple in structure and the area occupied by the scissor unit is small, so it is easy to maintain, the support shaft is lengthened, and the outer and inner blades are moved along the support shaft in the conveying direction of the packaging material. If it can be made to perform, it can also easily perform mold change work, such as adjustment of a cutting position.

Furthermore, unlike the die set, this cutting unit uses a scissor unit, so it can be cut even if the outer and inner blades are partially worn or chipped. There is also an advantage that it is excellent.
Further, the cutting unit, with shear blade having a shearing blade to the blade portions of the pair of the outer cutter are respectively attached to the rear end surface of each shearing blade, tension on the passage side of the blade portion of the inner cutter Each of the flexible shutter pieces to be fixed is fixed, and when the scissor unit is closed, the front end portion of the blade portion of the inner blade pushes the shutter piece and projects to the rear side of the shear blade of the outer blade. and for which, when the front end portion of the blade portion of the inner blade projecting rearward shearing blade of the outer blade returns to the initial position, the cutting adhered to the front end surface of the blade portion of the inner cutter Kasuga, the shutter piece, the blade Therefore, it is possible to reliably prevent the cut scraps from accumulating between the shear blades of the outer blade.

(A) is a top view which shows the bag making apparatus of the pouch container with a spout in which one Embodiment of the cutting unit concerning this invention was mounted, (b) is a side view which shows the bag making apparatus same as the above. It is a right view which shows a cutting | disconnection unit same as the above. It is a left view which shows a cutting | disconnection unit same as the above. It is sectional drawing along the XX line of FIG. 2 which shows the state which the scissor unit in the cutting | disconnection unit same as the above opened. It is sectional drawing along the XX line of FIG. 2 which shows the state with which the scissor unit in the cutting unit same as the above was closed. It is a detailed top view which shows the relationship between the shear blade of an outer blade and the shear blade part of an inner blade when a scissor unit same as the above is closed. It is a detailed top view of the shear blade part which shows the modification of a scissor unit. It is a detailed top view of the shear blade part which shows the modification of a scissor unit. (A) is a top view which shows the pouch container with a spout produced by the bag making apparatus same as the above, (b) is a front view showing the same pouch container with a spout, and (c) is a YY line of (b). FIG. It is a perspective view which shows the state which filled the content into the pouch container with a spout same as the above. It is a schematic block diagram which shows the bag making apparatus of the pouch container with a spout equipped with the conventional cutting unit. (A), (b) is explanatory drawing for demonstrating the removal process of the unnecessary part of a top gusset part by the bag making apparatus same as the above. (A), (b) is explanatory drawing for demonstrating the sealing process of the 2nd seal part by a bag making apparatus same as the above. It is explanatory drawing for demonstrating the sealing process of the 2nd seal part by a bag making apparatus same as the above. It is a front view which shows the pouch container with a spout just after bag making by a bag making apparatus same as the above. (A), (b) is explanatory drawing for demonstrating the problem of a bag making apparatus (cutting unit) same as the above.

  Hereinafter, embodiments will be described with reference to the drawings. 1 (a) and 1 (b) show a bag making apparatus 1 for a pouch container SP with a spout shown in FIGS. 9 (a) to 9 (c) and FIG. 10 on which the cutting unit of the present invention is mounted. As shown in FIGS. 1 (a) and 1 (b), the bag making apparatus 1 is formed from a packaging material roll R formed by winding a long strip-shaped packaging material M formed of a synthetic resin sheet into a roll shape. A spout mounting hole is formed in a portion corresponding to the top gusset portion P2 of the pouch P in the packaging material M, and a notch portion c (in a portion corresponding to the bottom gusset portion P3. A hole forming unit 3 for forming a notch forming hole as shown in FIG. 9 (b), a crease line forming unit 4 for forming a crease line in the delivered packaging material M, and the delivery direction of the packaging material M is a pouch P. The folding unit 5 that folds the packaging material M in the width direction so that it faces the width direction, and the spout S in the spout mounting hole portion formed in the portion corresponding to the top gusset portion P2 in the folded packaging material M Spout wearing unit to wear The portion corresponding to the peripheral edge of the top gusset portion P2 in the pouch P and the portion corresponding to the upper edge of the trunk portion P1 is heat-sealed with a predetermined width, and the portion corresponding to the peripheral edge of the bottom gusset portion P3 And the upper end of the body part P1 so that the part corresponding to the top gusset part P2 on which the spout S is mounted and the seal unit 7 that heat-seals the part corresponding to the lower edge part of the body part P1 with a predetermined width. Folding the part corresponding to the part and sandwiching it with the seal bar so as to include the folded part, the boundary part between the upper edge and the side edge of the trunk part P1 where the sealing failure is likely to occur, and the lower edge and side of the trunk part P1 A local seal unit 8 for locally heat-sealing the boundary portion with the edge, and a portion for cutting off an unnecessary portion so that the portion corresponding to the lower end corner portion of the bottom gusset portion P3 has an R shape. A cutting unit 10 and a cutting unit 10 for cutting a heat seal portion having a predetermined width into individual pouch containers SP with spouts, and a spout mounting unit 6, a sealing unit 7, a local sealing unit 8, In the bottom excision unit 9 and the cutting unit 10, portions corresponding to the three spout pouch containers SP adjacent in the delivery direction of the packaging material M are processed at the same time.

  In addition, a continuous feeding unit 11 that continuously feeds the folded packaging material M is installed between the folding unit 5 and the spout mounting unit 6, and on the downstream side of the local seal unit 8, An intermittent feed unit 12 that intermittently feeds the material M is provided, and the intermittent feed unit 12 is sent from the continuous feed unit 11 between the continuous feed unit 11 and the spout mounting unit 6 while the material M is stopped. An accumulator unit 13 for storing the folded packaging material is provided.

  The spout mounting unit 6 inserts the main body portion S1 of the spout S into a spout mounting hole formed in a portion corresponding to the top gusset portion P2 of the packaging material M, and the flange portion S2 of the spout mounting hole of the packaging material M. By heat-sealing to the periphery, the spout insertion / adhesion part 6a for temporarily adhering the spout S to the packaging material M and the flange part S2 of the spout S are heat-sealed again to the periphery of the spout mounting hole in the packaging material M, A spout bonding portion 6b for permanently bonding the spout S to the packaging material M and a spout cooling portion 6c for cooling the heat seal portion between the spout S and the packaging material M are provided. In the spout mounting unit 6, the spout of the spout S is provided. The steps of insertion into the mounting hole, temporary bonding, main bonding, and cooling are sequentially performed.

  The seal unit 7 heat-seals a portion corresponding to the periphery of the top gusset portion P2 of the packaging material M and a portion corresponding to the periphery of the upper end portion of the trunk portion P1 with a predetermined width, and at the periphery of the bottom gusset portion P3. A top / side / bottom bonding portion 7a for heat-sealing a corresponding portion and a portion corresponding to the periphery of the lower end portion of the body portion P1, a cooling portion 7b for cooling the heat-sealed portion of the packaging material M, and a packaging material M is provided with a cutting portion 7c for cutting off unnecessary portions so that a portion corresponding to the top gusset portion P2 in M has a substantially octagonal shape. In the seal unit 7, each step of bonding, cooling, and cutting of the packaging material M Are executed sequentially.

  The local seal unit 8 locally adheres again to the boundary portion between the upper edge and the side edge of the body portion P1 and the boundary portion between the lower edge and the side edge of the body portion P1 where a seal failure is likely to occur. A part 8a and a cooling part 8b for cooling the heat-sealed part are provided, and local bonding and cooling processes of the packaging material M are sequentially executed.

  Hereinafter, the cutting unit 10 mounted on the bag making apparatus 1 described above will be described in detail. As shown in FIGS. 2 to 5, the cutting unit 10 includes three sets of scissor units 20 arranged at predetermined intervals, and an opening / closing drive mechanism 30 that opens and closes the scissor units 20 at the same time. In addition, the three spouted pouch containers SP that are bag-made can be simultaneously cut by one cutting operation.

  As shown in the figure, each scissor unit 20 includes a pair of outer blades 21A, 21A in which an operation unit 23A is connected to a blade portion 22A to which a shearing blade having a shearing blade is attached, and a pair of outer blades 21A, A pair of outer blades 21A, 21A constituting the scissor unit 20 and an inner blade 21B sandwiched between 21A and an inner blade 21B having an operation portion 23B connected to a blade portion 22B having a shearing blade. The blade 21B positions the pair of outer blades 21A, 21A by a coil spring or the like while positioning the common support shaft 24 that passes through the boundary portions of the blade portions 22A, 22B and the operation portions 23A, 23B and a predetermined position of the support shaft 24. It is rotatably supported by a positioning / biasing member 25 that biases toward the blade 21B.

  Both ends of the support shaft 24 are fixed to a support member 26 erected on a top plate 51 of a base 50 disposed below the travel line of the packaging material M. Each scissor unit 20 The operation portions 23A and 23B of the pair of outer blades 21A and 21A and the inner blade 21B that are included in the base plate 50 enter the inside of the base 50 from the opening 51a formed in the top plate 51, and the operation portions 23A and 23B Cam followers 23Aa and 23Ba are respectively attached to the lower ends.

  As shown in the figure, the opening / closing drive mechanism 30 is fixed to the base plate 31 supported inside the base 50 via a support member 32 suspended from the top plate 51 of the base 50, and fixed to the upper surface of the base plate 31. The two parallel slide rails 33, 33 extending in a direction perpendicular to the conveyance direction of the packaging material M, a pair of sliders 34A, 34B sliding along the slide rails 33, and the conveyance of the packaging material M The connecting plates 35A and 35B that mutually connect the sliders 34A and 34A and the sliders 34B and 34B adjacent to each other on the upper surface side, and the cam followers 23Aa and 23Ba fixed to the upper surfaces of the connecting plates 35A and 35B. Concave members 36A and 36B each having a cam groove into which the motor is fitted, and a motor attached to the base plate 31 via a support member 38 7 and a screw shaft in which one end side is rotatably supported via a bearing 40A attached to the lower surface of the base plate 31 and extends in a direction orthogonal to the conveying direction of the packaging material M, and has an external thread formed on the outer peripheral surface. 39A and a screw having a male screw formed on the outer peripheral surface thereof, the other end of which is rotatably supported via a bearing 40B attached to the lower surface of the base plate 31 and extends in a direction perpendicular to the conveying direction of the packaging material M A connecting member 41 that connects the shaft 39B, the other end of the screw shaft 39A, and one end of the screw shaft 39B, a joint member 42 that connects one end of the screw shaft 39A to the drive shaft of the motor 37, a screw The connecting plates 35A and 35B pass through nuts 43A and 43B screwed into the shaft 39A and the screw shaft 39B, respectively, and openings 31a and 31b formed in the base plate 31. Connecting member 44A for coupling nut 43A, and 43B, respectively, and a 44B, the screw shaft 39A and the screw shaft 39B, the direction of the external thread formed on its outer peripheral surface is reversed.

  Therefore, when the motor 37 is rotated forward and backward, as shown in FIGS. 4 and 5, the screw shaft 39A and the screw shaft 39B rotate in the same manner as the drive shaft of the motor 37, and the nuts 43A and 43B move in the reverse direction. Along with this, the slider 34A and the slider 34B approach and separate from each other along the slide rails 33, 33, so that each scissor unit 20 opens and closes simultaneously, and the three pouch containers SP with spouts that have been made can be separated simultaneously. It can be done. At this time, the pair of outer blades 21A and 21A move integrally, and the pair of outer blades 21A and 21A and the inner blade 21B biased by a coil spring or the like are closed while sequentially contacting each other, whereby the packaging material M Is disconnected.

  As described above, the cutting unit 10 cuts the packaging material M with the scissor unit 20 having the pair of outer blades 21A and 21A and the inner blade 21B sandwiched between the pair of outer blades 21A and 21A. Therefore, the boundary part of the adjacent pouch container SP with a spout is cut off with a minute width of about 1 to 3 mm which is the thickness of the inner blade 21B. Therefore, when the pouch container SP with spout is separated from the packaging material M, even if the cutting position is slightly shifted, the boundary between the adjacent pouch containers SP with spout is located between the pair of outer blades 21A and 21A. As long as there is no burrs B at the rounded lower corners of the bottom gusset P3 in the separated spout pouch container SP.

  In addition, as shown in FIG. 5, when the cutting unit 10 closes the scissor unit 20, as shown in FIG. 6, the front end portion of the blade portion 22 </ b> B in which the shear blades 22 </ b> Ba and 22 </ b> Ba are formed in the inner blade 21 </ b> B The blades 22A and 22A of the pair of outer blades 21A and 21A are attached to the blade portions 22A and 22A and protrude to the rear side of the shear blades BL and BL having the shear blade 22Aa on the front end side. Since the inner edge of the rear end face is sharpened, the cutting waste of the packaging material M is difficult to accumulate between the shearing blades BL and BL.

  Further, in this cutting unit 10, two places with a slight interval (the interval between the pair of outer blades 21A and 21A, that is, the thickness of the inner blade 21B) can be simultaneously cut by one cutting operation. The cutting operation does not need to be performed twice, and does not hinder the high speed operation of the bag making apparatus 1 and the bag making apparatus 1 itself is not complicated.

  In this cutting unit 10, the outer blades 21 </ b> A and 21 </ b> A of the scissor unit 20 and the operation portions 23 </ b> A and 23 </ b> B of the inner blade 21 </ b> B and the opening / closing drive mechanism 30 that opens and closes the scissor unit 20 are disposed outside the travel space of the packaging material M. Since it can arrange | position in the internal space of a certain base 50, garbage and oil are hard to adhere to the packaging material M, and it is effective especially for the packaging for food and medical, and an aseptic filling packaging apparatus.

  Further, the cutting unit 10 has a simple structure, and the area occupied by each scissor unit 20 is small, so that it is easy to maintain, and the outer cutters 21A and 21A and the inner cutter 21B are supported by the positioning / biasing member 25. Since the shaft 24 can be positioned at any position, the cutting position can be easily adjusted. In particular, when changing the pouch to be bag-made to a pouch having a different width, the punching die set requires troublesome and time-consuming mold change work. In this cutting unit 10, each of the scissor units 20 Since it is only necessary to adjust the position, the mold changing operation can be easily performed.

  Further, unlike the punching die set, the cutting unit 10 employs the scissor unit 20, so that even if the outer blades 21A, 21A and the inner blade 21B are partially worn or chipped, they are cut. And has the advantage of excellent durability.

  In the above-described embodiment, when the scissor unit 20 is closed in order to make it difficult for the cutting waste of the packaging material M to be stored between the shear blades BL, BL of the outer blades 21A, 21A, the shear blades 22Ba, The front end portion of the blade portion 22B on which 22Ba is formed protrudes to the rear side of the pair of outer blades 21A, 21A shear blades BL, BL, but as shown in FIG. When the shutter pieces 27 and 27 having flexibility, which are formed of synthetic resin, rubber, or the like, are fixed to the rear end surface of the BL and project to the passage side of the blade portion 22B of the inner blade 21B. 27, when the front end portion of the blade portion 22B of the inner blade 21B protruding to the rear side of the shear blades BL, BL of the outer blades 21A, 21A returns to the initial position, the blade portion 22 of the inner blade 21B. The cutting scraps adhered to the front end surface of the sheet are surely peeled off from the blade portion 22B by the shutter pieces 27, 27, so that the cutting scraps of the packaging material M accumulate between the shear blades BL, BL of the outer blades 21A, 21A. It can be surely prevented.

  Further, as described above, instead of attaching the shutter pieces 27, 27 to the rear end surfaces of the shear blades BL, BL, by blowing air from the front end surface of the blade portion 22B of the inner blade 21B, the front end surface of the blade portion 22B It is also possible to peel off the excision residue adhering to the surface.

  Further, in the above-described embodiment, the shear blades BL and BL are attached so that the shear blades 22Aa and 22Aa come to the same position of the blade portions 22A and 22A of the pair of outer blades 21A and 21A. As shown in FIG. 8, one shear blade BL and the other shear blade BL are placed on the respective blade portions 22A and 22A so that the respective shear blades 22Aa and 22Aa are displaced from each other. If attached, the pair of shearing blades 22Aa and 22Aa do not cut the packaging material M at the beginning of cutting with the highest cutting resistance, and the initial resistance of cutting can be reduced.

  In the embodiment described above, the three scissor units 20 that open and close at the same time are provided so that the three spouted pouch containers SP that are bag-formed can be simultaneously cut by one cutting operation. The number of scissor units 20 installed is not particularly limited.

  Moreover, the bag making apparatus equipped with the cutting unit of the present invention is a bag making of a pouch container SP with a spout in which a spout S is mounted on the top gusset portion of the pouch having the top gusset portion P2 and the bottom gusset portion P3 as described above. The pouch container with a side gusset type spout, a pouch container with a bottom gusset type spout, a side gusset type pouch container without a spout, a bottom gusset type pouch container and a flat bag type pouch is not limited to the apparatus 1. It can also be mounted on a bag making apparatus for containers.

  It can be used as a cutting unit of a bag making apparatus that makes a bag while feeding a long band-shaped packaging material and sequentially separates the pouch containers that have been made.

DESCRIPTION OF SYMBOLS 1 Bag making apparatus 2 Packaging material delivery unit 3 Hole formation unit 4 Crease line formation unit 5 Folding unit 6 Spout mounting unit 7 Seal unit 8 Local seal unit 9 Bottom excision unit 10 Cutting unit 11 Continuous feed unit 12 Intermittent feed unit 13 Accum Unit 20 Scissor unit 21A Outer blade 21B Inner blade 22A, 22B Blade portion 22Aa, 22Ba Shear blade 23A, 23B Operation portion 23Aa, 23Ba Cam follower 24 Support shaft 25 Positioning / biasing member 26 Support member 27 Shutter piece 30 Opening / closing drive mechanism 31 Base plate 31a, 31b Opening 32 Support member 33 Slide rail 34A, 34B Slider 35A, 35B Connection plate 36A, 36B Concave member 37 Motor 38 Support member 39A, 39B Screw shaft 40 A, 40B Bearing 41 Connecting member 42 Joint member 43A, 43B Nut 44A, 44B Connecting member 50 Base 51 Top plate 51a Opening BL Shearing blade M Packaging material SP Pouch container with spout S Spout P Pouch

Claims (1)

The corner portion is mounted on a bag making apparatus for bagging a pouch container formed in an R shape, and an unnecessary portion is cut out so that a portion corresponding to the corner portion becomes an R shape, and a portion corresponding to one corner portion; A cutting unit that separates the pouch containers that are connected to each other in a state where the portion corresponding to the other corner portion is adjacent,
A pair of outer blades in which an operation unit is connected to a blade portion having a shearing blade;
An inner blade that is sandwiched between a pair of outer blades, and has an operation portion connected to a blade portion having a shearing blade;
A scissor unit having a support shaft that rotatably supports the pair of the outer blade and the inner blade at a boundary portion between the blade portion and the operation portion;
An open / close drive mechanism that opens and closes the scissor unit by operating the operation portion of the outer blade and the operation portion of the inner blade;
A shear blade having a shear blade is attached to each of the blade portions of the pair of outer blades, and a flexible shutter that protrudes toward the passage side of the blade portion of the inner blade on the rear end surface of each shear blade. Each piece is fixed, and when the scissor unit is closed, the front end of the blade part of the inner blade is configured to push the shutter piece and project to the rear side of the shear blade of the outer blade,
A cutting unit for cutting so that a boundary line between adjacent pouch containers connected to each other is positioned between a pair of outer blades.

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