JP2011207037A - Corner cutting device of bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corner cutting device of a bag making machine, which easily cut a corner of a multiple-stage shape such as a two-stage V shape.SOLUTION: A cutting part 31 in the corner cutting device 30 of the bag making machine is a punching part which is attached to a punch arm 38, is rotated together with rotation of the punch arm 38 with respect to an intermediate wrapping material 99, and which has a function of cutting off a triangle part 62 of the intermediate wrapping material 99 cooperated with a die part. The cutting part 31 includes, as blades, a main blade 40 and an auxiliary blade 42, and further includes: screws 52, 53, 54 and 55 serving as a main blade adjusting mechanism of adjusting positioning of the main blade 40 with respect to the punch arm 38; and an auxiliary blade adjusting mechanism of adjusting positioning of the auxiliary blade 42 with respect to the punch arm 38.

Description

  The present invention relates to a corner cutting device of a bag making machine, and more particularly to a corner cutting device of a bag making machine that cuts corners when manufacturing a plurality of bag containers using a sheet-like packaging material.

  In order to create a bag-like container etc. from a sheet-like packaging material, the sheet-like packaging material is folded in an appropriate order, the necessary parts are joined by adhesion, etc., and in some cases, an appropriate container mouth is attached, Further, in order to obtain an appropriate outer shape, the corners are cut and then cut into individual containers. A machine that manufactures a bag-like container by performing these steps in order is called a bag-making machine or the like.

  For example, in Patent Document 1, as a method of manufacturing a pouch container with a spout, when a packaging material is delivered from a packaging material delivery unit, a plurality of crease lines are formed in the crease line formation unit, and a crease line is formed in the fold unit. A portion corresponding to the body portion of the pouch, a portion corresponding to the top gusset portion, and a portion corresponding to the bottom gusset portion are formed. And it is described that the spout is attached to the top gusset portion, and the corner of the unnecessary portion is cut so that the portion corresponding to the top gusset portion has a substantially octagonal shape in that state.

  In Patent Document 2, as an automatic bag making and filling packaging method for continuously producing a self-standing bag with a spout made of a synthetic resin composite film until the contents are filled, the main body is formed with a spout and folded. The film is continuously supplied to the mandrel, the bottom-forming film is inserted between them, and heat-sealed with a chevron-shaped heater. It is stated that it will be punched.

International Publication WO2008 / 096392A1 Japanese Patent Publication No. 9-30506

  When manufacturing a bag-like container from a sheet-like packaging material, in addition to cutting for individual separation, corners are cut to adjust the outer shape. In the case of the said patent document 1, in order to set it as a substantially octagonal shape, the rectangular corner | angular part is cut off. As described above, when the corner is cut, the portion may become a sharp tip for cutting, and may feel uncomfortable, for example, when the container is held. In order to avoid this, an additional process for rounding the corners can be performed, but the cost is high.

  Therefore, it is conceivable to reduce the angle at the corner to the obtuse angle side as much as possible. In particular, since the end portion of the corner portion becomes a sharp tip, it is conceivable that the angle of the end portion is relaxed to the obtuse angle side from the original angle of the corner portion. For that purpose, the shape of the corner end of the tool for cutting may be widened to the obtuse angle side. For example, in the case of cutting a corner portion into a V shape, the tool may be designed so that the end portion of the V shape is widened to form a two-stage V shape. However, with such a two-stage shape, alignment between the cutting punch and the cutting die becomes very difficult, and the cutting blade may not mesh well. Difficulty further increases when the shape has three or more stages.

  An object of the present invention is to provide a corner cutting device of a bag making machine that can easily cut a plurality of corner portions.

  The corner cutting device of the bag making machine according to the present invention is a corner cutting device of a bag making machine that cuts corners by cutting when manufacturing a plurality of bag containers using a sheet-like packaging material, Collaborate with the die part, so that the main blade part has a blade shape that punches the main shape of the corner of the packaging material, and the main blade part cooperates with the die part before punching in cooperation with the die part The auxiliary blade portion having a blade shape that is partially cut into a shape that intersects the main shape at an obtuse angle with respect to the main shape at the corner portion of the packaging material, and the main blade portion and the auxiliary blade portion are integrated It is preferable to provide a punch arm that is rotated and held with respect to the die portion around the rotation center.

  In the corner cutting device of the bag making machine according to the present invention, the punch arm rotates the auxiliary blade portion and the main blade portion so that the auxiliary blade portion approaches the die portion before the main blade portion. It is preferable to have a laminating means for laminating in the direction.

  Moreover, in the corner | angular part cutting device of the bag making machine which concerns on this invention, the main blade part has a V-shaped blade shape which punches a packaging material by making a main shape into V shape, and an auxiliary blade part is V shape which is main shape. The central portion of the letter-shaped portion does not have a blade shape, and has a V-shaped angle larger than the V-shaped angle of the V-shaped blade shape of the main blade portion at each of both ends on both sides of the central portion. It is preferable to have a partial V-shaped blade shape that partially cuts.

  Further, in the corner cutting device of the bag making machine according to the present invention, the main blade adjustment mechanism that adjusts the positional relationship between the main blade and the die, and the main blade adjustment mechanism are independent of the auxiliary blade. It is preferable to provide an auxiliary blade adjustment mechanism that adjusts the positional relationship between the part and the die part.

  With the above configuration, the corner cutting device of the bag-making machine partially has a main blade portion having a blade shape that punches out the main shape of the corner portion, and an end portion of the main shape in a shape that intersects the main shape at an obtuse angle. And an auxiliary blade portion having a blade shape for cutting. Thus, since a corner | angular part is cut | disconnected using two blades, positioning with a die | dye part becomes easy by adjusting a main blade part and an auxiliary blade part separately, for example. In addition, since there may be one or more auxiliary blade portions, it is possible to perform corner cutting of a multi-step shape of two or more steps.

  The corner cutting device of the bag making machine further includes a punch arm that integrally holds the main blade portion and the auxiliary blade portion and rotates with respect to the die portion about the rotation center. Thereby, the corner | angular part of a several step | stage can be easily cut only by rotationally driving a punch arm.

  Further, in the corner cutting device of the bag making machine, the punch arm stacks the auxiliary blade portion and the main blade portion in the rotation direction so that the auxiliary blade portion approaches the die portion before the main blade portion. It has a stacking means. By doing in this way, a punch arm etc. can be reduced in size. Further, by separating the rotation center from the packaging material, it is not necessary to arrange a movable part that easily emits contaminants such as dust above the packaging material. Thereby, for example, it is possible to manufacture food containers, chemical containers, etc. in an environment with less contamination.

  Further, in the corner cutting device of the bag making machine, the main blade portion has a V-shaped blade shape that punches the packaging material with the main shape being V-shaped, and the auxiliary blade portion is a V-shaped center that is the main shape. The part does not have a blade shape, and has a V-shaped angle larger than the V-shaped angle of the V-shaped blade shape of the main blade part at each of both ends on both sides of the central part, and the packaging material is partially It has a V-shaped cutting edge. Thus, since the auxiliary blade portion does not completely cut off the corner portion of the packaging material, generation of chips can be suppressed.

  In addition, in the corner cutting device of the bag making machine, the auxiliary blade portion and the die portion independently of the main blade portion adjustment mechanism and the main blade portion adjustment mechanism that adjust the positional relationship between the main blade portion and the die portion. An auxiliary blade adjustment mechanism that adjusts the positional relationship between the two and the like. Thereby, since the main blade part and the auxiliary blade part can be positioned independently, the cutting of the multi-step corners is facilitated.

It is a figure explaining the mode of composition of a bag making machine to which a corner cutting device of an embodiment concerning the present invention is applied. It is a three-view figure explaining the mode of the container manufactured with the bag making machine which has the corner | angular part cutting device of embodiment which concerns on this invention. FIG. 3 is a perspective view corresponding to FIG. 2. It is a figure explaining the structure of the corner | angular part cutting device of embodiment which concerns on this invention. FIG. 5 is a detailed plan view of FIG. 4. It is a figure explaining the mode of the cutting part of the corner | angular part cutting device of embodiment which concerns on this invention. It is a figure explaining a mode when a main blade part is removed in FIG. It is a figure explaining the mode of a die part in a corner cutting device of an embodiment concerning the present invention. It is a figure explaining the effect | action of the corner | angular part cutting device of embodiment which concerns on this invention. It is a figure explaining the mode of the V-shaped single blade of a prior art for comparison. It is a figure explaining the mode of the two-stage V-shaped single blade of a prior art for comparison.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In the following, a bag manufacturing machine to which a corner cutting device is applied will be described for manufacturing a spouted container, but this is used as a suitable example of a bag manufacturing machine, and other configurations are used. Of course, it may be used as a bag making machine.

  Further, in the following, description will be made using an intermediate packaging material to which a spout has already been attached as a packaging material to be subjected to corner cutting, but this is also an example of the description, and the packaging material before the spout is attached. You may cut | disconnect a corner | angular part. Moreover, the case where the corner | angular part of the semi-finished product packaging material which has a more complicated structure than the state of the intermediate packaging material of description may be cut | disconnected.

  In the following description, the top gusset to which the spout is attached is described as being cut into the corners of the top gusset in order to make the top gusset substantially octagonal. It may be a cutting of the corners. Moreover, although what cuts a V shape in order to set it as a substantially octagonal shape is demonstrated, this is also an illustration, Comprising: The corner | angular part using an auxiliary blade part about the main shape cut | disconnected by a main blade part As long as the angle is made obtuse, the corner may be cut into a straight shape or the corner may be cut into a rectangle.

  The shapes, dimensions, materials, and the like described below are illustrative examples and can be appropriately changed in accordance with the specifications of the bag making machine or the like.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a diagram illustrating a configuration of a bag making machine 10 for manufacturing a spouted container. The bag making machine 10 includes a reel unit 12 around which a packaging material that is a sheet of raw material is wound, an accumulator unit 14 that is a buffer mechanism for sending out the packaging material, a folding device 16 that bends the packaging material, A spout mounting unit 18 for supplying and attaching spout to the folded packaging material, a joining unit 20 for joining the top part and bottom part of the spouted packaging material, a corner cutting device 30 for cutting the corner part, and a top part And a point joining portion 22 that joins other necessary portions other than the bottom portion, and a separation cutting unit 24 that separates into individual spouted containers.

  In the following drawings, the X, Y, and Z directions orthogonal to each other are shown in order to indicate from which direction the illustrated content is viewed. Here, the + X direction is the direction in which the packaging material flows, and the Z direction is the vertical direction of the bag making machine 10, that is, the direction perpendicular to the installation floor surface. The installation floor is a plane parallel to the XY plane. The + Y direction is the direction from the near side to the far side of the paper surface in the case of FIG.

  Before explaining the corner cutting of the packaging material, the spouted container 100 manufactured by the bag making machine 10 of FIG. 1 will be described with reference to FIG. 2 which is a three-view drawing and FIG. 3 which is a perspective view. The container 100 with a spout is a bag-like container provided with a container body called a pouch 102 and a door with a lid for container contents called a spout 110.

  A portion of the pouch 102 is formed by bending a sheet-like packaging material a plurality of times by a bending device 16 at a plurality of places, a body portion 104, a top portion 106 called a top gusset, and a bottom gusset below the body portion 104. A bottom portion 108 is formed. As shown in FIG. 2, the bottom portion 108 is a folding portion that can ensure the swelling of the container. These peripheral portions are joined by a heat seal technique or the like so that the joining unit 20 forms one bag-like container.

  The spout 110 includes a spout main portion 112 that is a cylinder with a lid, and a flange portion 114 that is provided at a lower portion of the spout main portion 112. A flange portion 114 is fitted into a hole formed in the top portion 106, and the flange portion 114 and the top portion 106 are joined by a heat seal technique or the like, so that the spout 110 is integrated with the pouch 102. In FIGS. 2 and 3, a portion bonded by a heat seal technique or the like is shown as a bonding portion 120.

  The top portion 106 has a substantially octagonal shape as shown in FIG. The top portion 106 is thus formed in a substantially octagonal shape from a single sheet-like packaging material. The substantially octagonal shape can be formed by sequentially cutting the material on the plane at the sides of a plurality of straight portions, and the corner cutting unit 30 is used for this purpose. If a substantially octagon is formed by the sides of a plurality of straight portions, the intersections of the straight portions become sharp corners, and the user may feel pain when holding the spouted container 100 by hand.

  As shown in FIGS. 2 and 3, the spout-equipped container 100 is devised so that the corner portion of the substantially octagonal shape of the top portion 106 does not hurt. That is, a new cutting edge 68 is provided so as to intersect with the original cutting edge 66 at an obtuse angle, and more specifically, it is a dodecagon. Including the addition of this new cutting edge 68, the cutting of the corner will be described below.

  FIG. 4 is a front view and a side view illustrating the configuration of the corner cutting device 30. Here, an intermediate wrapping material 99 to which a spout is attached is shown as an object of corner cutting. The intermediate packaging material 99 is in the form of a continuous intermediate sheet material without the corners of the spouted container 100 of FIG. 2 being dropped yet and being separated as individual spouted containers 100. . 4 shows the spout main part 112, the trunk part 104, the top part 106, and the bottom part 108, the trunk part 104, the top part 106, and the bottom part 108 are in a state before being individually separated.

  The corner cutting device 30 is disposed along the direction in which the intermediate packaging material 99 flows, and includes a die part 70, a cutting part 31, a punch arm 38 to which the cutting part 31 is attached, and a drive mechanism that rotationally drives the punch arm 38. Consists of including. The drive mechanism includes an air cylinder 34 and a drive arm 36.

  The air cylinder 34 is a mechanism that moves the cylinder up and down in the Z direction by a high driving pressure supplied by being appropriately pressurized from atmospheric pressure.

  The drive arm 36 has one end attached to a rotary shaft supported by a support hole provided in the casing 37 of the corner cutting device 30 and the other end connected to the tip of the drive shaft of the air cylinder 34. It is a material. The drive arm 36 has a function of rotating the rotating shaft when the other end is driven up and down by the air cylinder 34. A punch arm 38 is connected to the rotating shaft. Therefore, the air cylinder 34 can be moved up and down, whereby the punch arm 38 can be rotationally driven via the drive arm 36. In addition, this rotation does not need to rotate 360 degree | times and may be what is called a rocking | fluctuation.

  As shown in FIG. 4, the air cylinder 34 and the drive arm 36 are arranged along both sides in the X direction through which the intermediate packaging material 99 flows. Accordingly, the punch arms 38 are also disposed along both sides of the intermediate packaging material 99 in the X direction, that is, on both sides of the intermediate packaging material 99. As shown in FIG. 4, one punch arm 38 is provided with three cutting portions 31 along the X direction. Therefore, by driving the two sets of punch arms 38, the intermediate wrapping material 99 is simultaneously cut at the corners from both sides of the three top portions 106. At the timing of cutting these six corners, the flow of the intermediate packaging material 99 is temporarily stopped.

  FIG. 5 is a detailed plan view of the vicinity of the cutting portion 31 of the corner cutting device 30. Here, the intermediate packaging material 99 is shown so as to flow in the + X direction. As described above, three cutting portions 31 are arranged on both sides of the intermediate wrapping material 99, respectively, two of which are shown in FIG.

  The intermediate wrapping material 99 has a triangular portion 62 between the two top portions 106 in a state before being fed into the corner cutting device 30. And after passing the corner | angular part cutting device 30, the triangular part 62 is cut off and it becomes the notch part 64. FIG. The notch 64 is substantially V-shaped, but as described in FIGS. 2 and 3, the cut edge 66 constituting the original V-shape and the additional cut edge that intersects the cut edge 66 at an obtuse angle. 68 and a two-stage V-shape. As described above, the corner cutting device 30 is a device having a function of cutting off the triangular portion 62 of the intermediate packaging material 99 to form a two-stage V-shaped cutout portion 64.

  The cutting part 31 is attached to the punch arm 38 and rotates with respect to the intermediate packaging material 99 as the punch arm 38 rotates, and cooperates with the die part 70 not shown in FIG. It is a punch part which has the function to cut off. The cutting portion 31 includes a main blade portion 40 and an auxiliary blade portion 42 as cutting blades, and further includes a main blade portion adjustment mechanism that adjusts the positioning of the main blade portion 40 with respect to the punch arm 38, and the punch arm 38. An auxiliary blade adjustment mechanism for adjusting the positioning of the auxiliary blade 42 is provided. Screws 52, 53, 54, and 55 are used as the main blade adjustment mechanism, and screws 56, 57, 58, and 59 are used as the auxiliary blade adjustment mechanism. In FIG. 5, the auxiliary blade adjustment mechanism is used. These four screws are not shown hidden behind the four screws of the main blade portion adjusting mechanism.

  As described above, the punch arm 38 is a rotary arm connected to the rotary shaft supported by the support hole of the casing 37 of the corner cutting device 30. The punch arm 38 has a function of fixing and holding the three cutting portions 31 along the X direction. And about each cutting | disconnection part 31, it has the function to hold | maintain the main blade part 40 and the auxiliary blade part 42 which are the component integrally. A fixing screw 50 shown in FIG. 5 and a fixing screw 51 for fixing the auxiliary blade portion 42 (not shown in FIG. 5 hidden under the main blade portion 40) are fastening members for this integrated holding. is there.

  FIG. 6 is a plan view and a side sectional view of one cutting portion 31. 7 is a plan view and a side cross-sectional view of the state where the main blade portion 40 is removed from FIG. FIG. 8 is a cross-sectional plan view and a side cross-sectional view of the die part 70 shown in a relationship corresponding to the cutting part. In these drawings, the rotation center 39 of the punch arm 38 is shown.

The main blade portion 40 of the cutting portion 31 is a main punch having a blade shape that cooperates with the die portion 70 and punches out the main shape of the corner portion of the intermediate packaging material 99. Here, a V shape having an apex angle θ _A is used as the main shape. Here, the apex angle θ _A can be set to 90 degrees, for example. The blade shape is provided at the side of the V-shape.

  The auxiliary blade portion 42 is an auxiliary punch arranged so as to cooperate with the die portion 70 before the main blade portion 40 performs punching in cooperation with the die portion 70. The auxiliary blade portion 42 has a blade shape that partially cuts the end portion of the main shape of the intermediate packaging material 99 into a shape that intersects the main shape at an obtuse angle.

As shown in FIG. 7, the auxiliary blade portion 42 does not have a blade shape in the V-shaped central portion 44 which is the main shape, and the main blade portion 42 has a main portion on each of both end portions 46 and 47 on both sides of the central portion. The blade portion 40 has an apex angle θ _B larger than the apex angle θ _A of the V-shaped blade shape, and has a partial V-shaped blade shape that partially cuts the intermediate packaging material 99. θ _B is a V-shaped apex angle obtained by extending both ends 46 and 47, and for example, 135 degrees can be used.

  As described above, the auxiliary blade portion 42 is provided only at the both end portions 46 and 47 as the blade shape, so that the blade is cut from the end portion of the intermediate wrapping material 99 by the length of the both end portions 46 and 47. It has a function to insert, and does not completely cut off the intermediate packaging material 99. As a result, generation of chips can be suppressed.

  The fixing screw 50 stacks the auxiliary blade portion 42 and the main blade portion 40 in the rotational direction so that the auxiliary blade portion 42 approaches the die portion 70 before the main blade portion 40 with respect to the punch arm 38. It is a stacking means. Specifically, since the die part 70 is disposed in the −Z direction, which is the lower part of the cutting part 31, the auxiliary blade part 42 is disposed in the −Z direction below the main blade part 40, and the auxiliary blade part 42. The main blade part 40 is stacked so as to overlap the upper part. Then, after the auxiliary blade portion 42 is first fastened to the punch arm 38 with the fixing screw 51, the main blade portion 40 is firmly fastened to the punch arm 38 with the fixing screw 50 and integrated.

  As shown in FIG. 6 and the like, the rotation center 39 of the punch arm 38 is provided at the stacking position where the auxiliary blade portion 42 and the main blade portion 40 are stacked. If the stacking position in the Z direction is Z = 0, the rotation center 39 is provided in the vicinity of Z = 0 or Z = 0. By doing in this way, when the height of the cutting edge of the die part 70 in the Z direction is Z = 0, the main blade part 40 can be brought into contact with the blade shape substantially perpendicularly to the plane of the intermediate packaging material 99. Further, since the main blade portion 40 does not hit the intermediate packaging material 99 prior to the auxiliary blade portion 42, the auxiliary blade portion 42 can cut the intermediate packaging material 99 from the outside.

  Screws 52, 53, 54, and 55 shown in FIG. 6 are main blade adjustment mechanisms for adjusting the positional relationship of the main blade 40 with respect to the punch arm 38. In FIG. 6, the screw 57 on the foremost side of the auxiliary blade adjustment mechanism is slightly shown. Among these, the screws 52 and 53 are for projecting the main blade portion 40 in the + Y direction with respect to the punch arm 38, and the screws 54 and 55 are for retracting in the −Y direction. The reason why they are provided on the left and right sides is to enable adjustment of the inclination angle of the main blade portion 40 on the XY plane.

  Similarly, screws 56, 57, 58, 59 shown in FIG. 7 are auxiliary blade adjustment mechanisms for adjusting the positional relationship of the auxiliary blade 42 with respect to the punch arm 38. Among these, the screws 56 and 57 are for projecting the auxiliary blade portion 42 in the + Y direction with respect to the punch arm 38, and the screws 58 and 59 are for retracting in the −Y direction. The reason why they are provided on the left and right sides is to enable adjustment of the inclination angle of the auxiliary blade portion 42 on the XY plane. Thus, the auxiliary blade portion 42 and the main blade portion 40 can independently adjust the positional relationship with respect to the punch arm 38.

  FIG. 8 is a diagram illustrating a state of the die unit 70. The die portion 70 has the same blade shape as the design of the cutout portion 64 so that the triangular portion 62 of the intermediate packaging material 99 is cut off as the cutout portion 64. Therefore, it has a two-stage V-shaped blade shape having five bending angles 71, 72, 73, 74, and 75. In order to match the blade shape of the cutting portion 31 to this blade shape, a main blade portion adjusting mechanism and an auxiliary blade portion adjusting mechanism are used.

  That is, the fixing screw 50 is once loosened, and the two sides of the main blade portion 40 are connected to the sides between the bend corner 71 and the bend angle 72 using the screws 52, 53, 54, and 55 that are the main blade portion adjustment mechanism. Align with the edge between the corners 73. Next, in this state, the auxiliary blade portion 42 is adjusted to the corners 72, 73, 74, and 75 using screws 56, 57, 58, and 59 that are auxiliary blade portion adjustment mechanisms. As described above, since the central portion 44 of the auxiliary blade portion 42 does not have a blade shape, it is not necessary to align the auxiliary blade portion 42 with the bending angle 71.

  When these are finished, the fixing screw 50 is turned again to firmly fasten the main blade portion 40 and the auxiliary blade portion 42 to the punch arm 38. In this way, the blade shape of the cutting part 31 can be accurately matched to the two-stage V-shaped blade shape of the die part 70.

  FIG. 9 is a diagram for explaining the operation of the above configuration. Here, when the cutting part 31 is in the initial state, when the cutting by the auxiliary blade part 42 of the cutting part 31 is performed, and when the cutting by the main blade part 40 of the cutting part 31 is performed is shown in time series. Yes.

  The state diagram at the top of FIG. 9 is a diagram illustrating a state when the cutting unit 31 is in the initial state. Here, the cutting part 31 is in a state where the rotation state of the punch arm 38 is most rotated counterclockwise on the paper surface of FIG. As described above, the punch arm 38 does not rotate once around the rotation center 39 but reciprocates within a predetermined rotation angle range. That is, it performs a so-called rocking motion. As already described, the punch arm 38 may be rotated 360 degrees.

  The middle state diagram of FIG. 9 shows a state in which the cutting portion 31 rotates clockwise around the rotation center 39 on the paper surface of FIG. 9 from the initial state and the cutting by the auxiliary blade portion 42 of the cutting portion 31 is performed. FIG. Here, the blade shapes of both end portions 46 and 47 of the auxiliary blade portion 42 are just in contact with the blade shape of the die portion 70. Therefore, the cutting portion 31 further rotates, so that the intermediate packaging material 99 is cut corresponding to the cutting edge 68.

  The state diagram at the bottom of FIG. 9 shows a state where the cutting portion 31 further rotates around the rotation center 39 in the clockwise direction on the paper surface of FIG. 9 and is cut off by the main blade portion 40 of the cutting portion 31. FIG. Here, the blade shape of the main blade portion 40 is just in contact with the blade shape of the die portion 70. At this time, the position of the rotation center 39 in the Z direction is set to be substantially the same position with respect to the upper surface of the die shape of the die portion 70, so that the edge of the main blade portion 40 hits the surface of the intermediate packaging material 99 almost perpendicularly. You can get started.

  When the cutting portion 31 further rotates from this state, a portion corresponding to the cutting edge 66 is cut into the intermediate packaging material 99. In this way, the triangular portion 62 of the intermediate packaging material 99 is cut off together with the cutting of the cutting edge 68, and the cutout portion 64 is formed.

  As described above, the notch portion 64 has a V-shaped end portion, which is a main shape formed by the main blade portion 40, of the triangular portion 62 that is a corner portion of the intermediate packaging material 99 by the auxiliary blade portion 42. The main shape is cut into a shape that intersects at an obtuse angle to form a two-stage V-shape. Thus, since the corner portion has a two-stage V-shape, the user feels less painful when holding it in his / her hand than when the corner portion has a V-shape.

FIG. 10 and FIG. 11 are diagrams showing examples of a cutting part and a die part of the prior art for comparison. FIG. 10 is a view for explaining the state of the V-shaped single blade 80 and the die portion 82 corresponding thereto. This one blade 80, because the apex angle is a simple V-shape with a theta _A, may, combined blade-shaped three corner 83, 84, 85 of the die portion 82. This adjustment is not very difficult. However, since the corner of the processed object is V-shaped, the user may feel pain when holding it in his hand.

FIG. 11 is a view for explaining the state of the two-stage V-shaped single-blade 90 and the die portion 92 corresponding thereto. Since the single blade 80 has a two-stage V-shape having an apex angle θ _A and a skirt portion having an apex angle θ _B , five bending angles 93, 94, 95, 96, of the die portion 92 are formed. The blade shape must be matched to 97. This adjustment operation is very difficult. Actually, the blade shape of the single blade 80 and the blade shape of the die portion 92 cannot be properly matched, or even if the blade processing is continued, the blade is not removed. Hits occur. Thus, it is difficult to perform a two-stage V-shaped cutting with the single blade 80.

  The corner cutting device of the bag making machine according to the present invention can be used to create a bag-like container from a sheet-like packaging material.

  10 bag making machine, 12 reel unit, 14 accumulator unit, 16 folding device, 18 spout mounting unit, 20 joining unit, 22 point joining portion, 24 separation cutting unit, 30 corner cutting device, 31 cutting portion, 34 air cylinder, 36 Drive arm, 37 Housing, 38 Punch arm, 39 Center of rotation, 40 Main blade, 42 Auxiliary blade, 44 Central part, 46, 47 Both ends, 50, 51 Fixing screw, 52, 53, 54, 55, 56, 57, 58, 59 Screw, 62 Triangle part, 64 Notch part, 66, 68 Cutting edge, 70, 82, 92 Die part, 71, 72, 73, 74, 75, 83, 84, 85, 93, 94 , 95,96,97 Bending angle, 80,90 1 blade, 99 Intermediate packaging material, 100 Spouted container, 102 Pouch, 1 4 barrel, 106 top portion 108 bottom portion 110 spout, 112 spout main portion, 114 flanges, 120 junction.

Claims (4)

A corner cutting device of a bag making machine that cuts corners by cutting when manufacturing a plurality of bag containers using a sheet-like packaging material,
A main blade portion having a blade shape that cooperates with the die portion to punch out the main shape of the corner portion of the packaging material;
A shape in which the main blade portion is arranged so as to cooperate with the die portion before punching in cooperation with the die portion, and the end portion of the main shape of the corner portion of the packaging material intersects the main shape at an obtuse angle An auxiliary blade portion having a blade shape partially cut into
A punch arm that integrally holds the main blade and the auxiliary blade and rotates with respect to the die around the rotation center;
A corner cutting device for a bag making machine, comprising: In the corner cutting device of the bag making machine according to claim 1,
The punch arm
Corner cutting of a bag making machine, characterized by having a laminating means for laminating the auxiliary blade portion and the main blade portion in the rotational direction so that the auxiliary blade portion approaches the die portion before the main blade portion apparatus. In the corner cutting device of the bag making machine according to claim 2,
The main blade portion has a V-shaped blade shape that punches the packaging material with the main shape being V-shaped,
The auxiliary blade portion does not have a blade shape in the central portion of the V-shape which is the main shape, and the V-shaped angle of the V-shaped blade shape of the main blade portion is larger than the V-shaped angle of the main blade portion at each of both ends on both sides of the central portion. A corner cutting apparatus for a bag making machine, having a large V-shaped angle and a partial V-shaped blade shape for partially cutting a packaging material. In the corner cutting device of the bag making machine according to claim 1,
A main blade adjustment mechanism that adjusts the positional relationship between the main blade and the die,
A corner cutting device for a bag making machine, comprising an auxiliary blade adjustment mechanism that adjusts the positional relationship between the auxiliary blade and the die independently of the main blade adjustment mechanism.

Images