JP2006001579A - Cutter for cutting bag and end seal cutter incorporating it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter for cutting a bag forming round cuts simultaneously at corners of a seal during a normal cutter operation or a seal cutting operating in a process of manufacturing a bag or a package, and also to provide an end seal cutter incorporating the same. <P>SOLUTION: Either sealing block 31 of two opposite sealing blocks constituting an end sealer has a slit 34 into which a cutter edge 1 moves in/out with a slightly widened width although extending along a cross section of the edge 1. The cutter edge 1 consists of a body blade 7 including a notch forming blade 11 for forming an easily unsealable notch and four arcuate split blades 9 split from both ends of the body blade 7. The cutter edge 1 moves between a position where it completely retreats in the sealing block 31 and is stored inside and a position where it protrudes from the block 31 as shown in the figure to serve as a cutter. The arcuate split blade 9 cuts a corner of the bag into a round shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is applicable to a bag making machine, or a packaging machine such as a bag making and filling machine or a pillow packaging machine, and in particular, a bag cutting cutter device that cuts both sides of an end seal portion of a bag into a round shape and the same. The present invention relates to an end seal / cutter device in which is incorporated.

  Conventionally, in a bag-filling and packaging machine that manufactures a package by manufacturing a bag while manufacturing a bag like a pillow packaging machine, the packaging film is generally formed into a cylindrical shape with a center seal. The end of the bag is formed to form the bottom of the bag, the product to be packaged is filled or filled in the packaging film, and the end seal is applied to the portion corresponding to the bag mouth, so that the bag becomes a pillow-shaped packaging bag. A bag package in which the product is accommodated is manufactured. In the bag making filling and packaging machine, the bag package can be continuously manufactured by repeating the formation of the bag bottom and the sealing of the bag mouth. By cutting the boundary portion between adjacent bags or packages with a cutter, the manufactured bags or packages are individually separated. In a packaging machine such as a bag making machine that manufactures only bags that do not contain products inside, there is no filling process, but it is based on the seal and cutter used in bag making filling and packaging machines such as pillow packaging machines. Blocking and cutting are performed. Note that there are various types of cutters for cutting the packaging material, and one type of cutter is a type of cutter that cuts through the packaging material.

  FIG. 11 is a schematic perspective view showing an example of a conventional vertical bag making and filling machine. In the vertical bag making and filling machine 60, a web-like packaging material 70 is formed into a cylindrical packaging material 71 by a former 61. A center seal is applied by the center seal means 62. The cylindrical packaging material 71 is filled with the product S as a package by being dropped through the filling cylinder 63. The end seal / cut means 64 applies end seal to the cylindrical packaging material 71 to manufacture the bag package 73 formed in advance and packaged with the product S as a package, and at the same time, the product An end seal on the bottom side of the bag 72 into which S is introduced is formed. On both the left and right sides of the outer periphery of the filling cylinder 63, a packaging material feed belt mechanism 65 for feeding the cylindrical packaging material 71 is disposed. The seal blocks 64a and 64b constituting the end seal / cut means 64 operate so as to approach and separate from the tubular packaging material 71, and sandwich the bag 72 in a direction crossing the tubular packaging material 71 when approaching. And an end sealer for forming an upper end seal of the bag packaging 73.

  The end seal / cut means 64 further includes a cutter blade 66 that cuts the tubular packaging material 71 in such a manner as to pierce the tubular packaging material 71 between both end sealers. The cutter blade is attached to one seal block 64a so as to be movable back and forth in the lateral direction between the upper end sealer portion and the lower end sealer portion, and the cutter blade 66 is attached to the other seal block 64b. An intrusion groove 67 is formed. When the seal blocks 64a and 64b approach each other, the upper and lower end sealers sandwich the packaging material so as to flatly crush and weld the cylindrical packaging material 71 to form the end seal portion. At that time, the cutter blade 66 advances from the seal block 64a in the lateral direction, and is cut in a manner of breaking through the tubular packaging material 71. Thereafter, the cutter blade 66 is retracted into the seal block 64 a and the end sealers are separated from each other, whereby the bag packaging body 73 is separated from the cylindrical packaging material 71.

  By the way, according to the recent diversification of confectionery foods, packages having various food products as packages have been manufactured and sold. Such a package is often packaged in an oxygen-free state by enclosing nitrogen gas or oxygen scavenger from a hygienic point of view, but such aseptic and oxygen-free conditions are maintained for a sufficiently long period. Need to be done. In order to ensure the shielding from the outside air containing oxygen, there is a tendency that a bag is formed from a multilayer material obtained by vapor-depositing or bonding an aluminum film, and the strength of the packaging material or the sealing seal is increased.

  The packaging body having a relatively high strength and sealing degree as described above, when the cylindrical packaging material is cut by the cutter device at the seal portion, corners with sharp sharp edges are generated at both ends of the seal portion. There are many. In particular, elderly people and children may poke their arms, hands or fingers at such sharp and sharp corners. Moreover, opening the bag becomes more difficult as the degree of sealing is improved, and an easy-opening structure that assists in opening the package is required. In particular, there is a demand for easy opening even when elderly people or children cannot obtain a large opening force at their hands. Conventionally, as an easy-opening structure of a bag package, a structure such as forming an I notch, a V notch, and a corrugated edge at the edge of the bag has been proposed. However, the I-notch is less likely to give a high-class feel to the package, and the V-notch and corrugated edge are better-looking than the I-notch, but the sharpness of the valley that triggers opening is difficult to produce, and tearing starts May not be easy. Moreover, even if the tearing can be started, the tearing direction is not always constant depending on the type of the packaging material, and there is a problem that the unsealing enough to take out the package cannot be realized. In addition, since the V notch is usually formed at only one place, if the first opening fails, it is difficult to open again.

In bag making machines and bag making filling and packaging devices that continuously produce bags or bag packages from web-like packaging materials, manufacture bags and bag packages in which R parts are formed at both corners of the seal part. It has been proposed to do. As one of the means for manufacturing such bags and bag packages, a position where a lateral seal is to be applied in the middle of supplying a packaging material (a cylindrical shape that is folded flatly and sealed in the lateral open end) A manufacturing method of a packaging bag such as a pouch and a bag making and filling packaging machine are proposed in which a wedge-shaped cut is formed in advance by a cutter at a boundary position of each bag when the film is a bag. (See Patent Document 1). According to this proposal, the range including the apex that is the deepest part of the cut formed in a wedge shape is cut across the entire width of the film with two cutters, thereby efficiently cutting individual bags whose corners are cut obliquely. It is intended to be manufactured.
JP 2002-128007 A (paragraphs [0027] to [0030], [0051] to [0070], FIG. 1, FIG. 2, FIG. 10, FIG. 11, FIG. 14 to FIG. 16)

In a packaging bag cutting device that is provided on a path through which a film of a filling and packaging machine is conveyed and cuts a heat-sealed seal portion and separates it into individual packaging bags, a pair holding the seal portion across the seal portion A first cutting mechanism having a cutting cutter for cutting the packaging bag by cutting along the sealing portion sandwiched between the sandwiching body, and at least one end side of the sealing portion sandwiched by the sandwiching body And a second cutting mechanism having a corner cutter for cutting the corner, and it has been proposed to provide the first cutting mechanism at a position corresponding to the seal portion cut by the second cutting mechanism. . A cutting cutter as a first cutting mechanism provided in one of the pair of sandwiching bodies is a center cutter that cuts a portion excluding both side portions of the horizontal seal portion, and advances toward the seal portion and simultaneously follows the seal portion. The seal part is cut obliquely by moving in the direction. Further, the corner cutter as the second cutting mechanism provided in the other sandwiching body is a set of side cutters for cutting the corners on both ends of the lateral seal portion. The corner cutters form R portions at both corners of the sealed portion of the manufactured bag or bag package (see Patent Document 2). According to this proposal, it is possible to prevent misalignment between the cutting positions of the cutting cutter and the corner cutter, to smoothly shape the cut portion of the seal portion, and to minimize the decrease in productivity. ing.
JP 2003-341610 A ([0038] to [0055], [0071] to [0090], FIG. 3 to FIG. 9, FIG. 14 to FIG. 21)

  In a bag making machine that manufactures a bag and a bag making filling and packaging device that fills and packs a product with the inside of the bag together with the manufacture of the bag, the bag or bag packaging body in which R portions are formed at both corners of the seal portion The required operation is the same as that of the conventional cutter or seal / cutter device, but at the same time the bag and package are separated from the cylindrical packaging material, and at the corners of the bag are formed. There is a problem to be solved in that it is possible to do.

  An object of the present invention is to provide a normal cutter operation or a sealing / cutting device in a process of manufacturing a bag or a package as a cutter or a seal / cutter for cutting a bag or a package manufactured continuously from a web-shaped packaging material. It is possible to simultaneously form an R-cut at the corner of the seal in the cutting operation, and there is no need to provide a cutter device dedicated to the R-cut separately from the cutter device for cutting the bag or package, and the bag cutting cutter device It is an object to provide an end seal cutter apparatus incorporating the above.

  In order to solve the above problems, a bag cutting cutter device according to the present invention is a bag cutting cutter device that separates and cuts a preceding bag and a subsequent bag continuously formed from a web-shaped packaging material. A main body blade portion that cuts through an intermediate portion between both side edges of the packaging material, and two rounded branch blade portions that branch from each other at least one end portion on both sides of the main body blade portion and cut a corner portion of the packaging material; It consists of having a cutter blade consisting of

  According to this bag cutting cutter device, when the bag cutting cutter device operates, the main body blade portion cuts through the intermediate portion between both side edges of the flat cylindrical packaging material, and the both sides of the main body blade portion. The rounded branched blade portions that are branched from at least one end portion cut the tubular packaging material in a rounded shape until reaching both side edges on each bag side simultaneously with the operation of the main body blade portion. Therefore, the cutter device for bag cutting attaches the cutter blade to a normal cutting mechanism to separate and cut the preceding bag and the succeeding bag, and at the same time, at the corner of the bag with respect to the preceding bag and the succeeding bag. Cuts can be made. In the case where the rounded branched blade portion is provided only on one side of the main body blade portion, for example, a bag such as a pouch is continuously manufactured in a horizontally placed state, which is suitable for cutting the upper corner portion into a rounded shape. is there. In addition, when the rounded branch blade portions are provided on both sides of the main body blade portion, it is preferable when the three-side seal bag or the four-side seal bag is continuously manufactured in a vertically placed state and the four corners are cut into round shapes.

  In this bag cutting cutter device, the main body blade portion of the cutter may be provided with a notch forming blade in such a manner as to continuously protrude laterally from the main body blade portion. By providing a notch forming blade on the main body blade portion, when the intermediate portion between both side edges of the cylindrical packaging material is cut through, the bag corresponds to the notch forming blade provided on the side from the main body blade portion. The notch for easy opening which the notch opened in the edge part formed by cutting | disconnecting is automatically formed. In the order of forming a notch for easy opening at a later time on the cutting edge portion of the bag, the cutting edge portion is pushed by the notching blade and escapes when the notching blade tries to cut through the cutting edge portion. It is difficult to form a good notch for easy opening. Therefore, in the case of a cut-off cutter, by providing a notch forming blade protruding forward from the main body blade portion in the cut-off direction, the notch forming blade first cuts the cylindrical packaging material first to form a notch for easy opening, Then, a good notch for easy opening is formed by cutting through an intermediate portion between both side edges of the cylindrical packaging material. In addition, you may provide a notch formation blade only in the one side of the main-body blade part of a cutter. In this case, if one or more notch forming blades are provided, one or more notches can be formed in each bag. Further, the notch forming blades may be provided on both sides of the main body blade portion. In this case, notches can be formed in both seal portions of the bag.

  In the bag cutting cutter device provided with the notch forming blade, the notch forming blade is protruded toward the side where the notch forming blade is provided in the vicinity thereof including the portion where the notch forming blade is provided. Can be curved. In relation to the notch forming blade, the vicinity of the main body blade portion including the portion where the notch forming blade is provided is curved in the above manner, whereby the manufactured bag is bent into the convex shape of the main body blade portion. A notch extending further toward the inner bag side is formed from the recess formed corresponding to the portion. Therefore, since the corner portion of the formed notch is formed in the recess and does not come out, unintentional opening of the bag proceeding from the notch is prevented in advance, and the corner portion of the sharp notch against the hand or finger is prevented. The hit can be eased. However, when the notch forming blades are provided on both sides of the main body blade part, if they are provided at the same position, the portion surrounded by the both concave parts becomes chips, so that the position of the notch forming blades may be shifted in the longitudinal direction of the main body blade part. desirable.

  In this bag cutting cutter device, the main body blade part and the cutting edge part of the rounded branched blade part can be formed as a corrugated blade in which teeth are continuously arranged in the longitudinal direction. By making the cutting edge part a corrugated blade in which teeth are continuously arranged in the longitudinal direction, even when pressed straight against the packaging material, each tooth of the continuous teeth hits the packaging material in the form of dots, and the cutting start point Can be formed. If the starting point of cutting is formed, the packaging material can be cut through by the subsequent movement of the cutter blade.

  An end seal / cutter device according to the present invention is configured by incorporating the above-described bag cutting cutter device into an end sealer that performs end sealing for the bag across the packaging material. According to this end seal / cutter device, the bag cutting cutter device operates when the end sealer applies the end seal for the bag across the packaging material, and the bag cutting cutter device is related to the applied end seal. Then, the packaging material is cut and the bags are separated, and at the same time, the corners are cut into rounded shapes. That is, in the bag making machine or the bag making and filling machine, in order to continuously form the preceding bag and the succeeding bag from the cylindrical packaging material, the cutter blade is an end seal device that forms an end seal across the cylindrical packaging material. In some cases, it may be configured as an end seal / cutter device. When using an end sealer with a sealing contour that seals the corners of the bag in a round shape, the main body blade portion is arranged so that the cylindrical packaging material can be cut between adjacent end seals, and the rounded branch blade portion is a seal. By having a shape along the contour and arranging along the seal contour, the bag cutting cutter device is incorporated as a cutter device of the end seal cutter device. By incorporating the bag cutting cutter device into the end seal / cutter device, an end seal is formed in the cylindrical packaging material, and the preceding bag and the subsequent bag are separated and the four corners are cut simultaneously.

  In this end seal / cutter device, the end sealer is composed of two seal blocks which are opposed to each other and can be contacted / separated from each other, and one of the seal blocks is formed with a slit for accommodating the cutter blade so as to be able to advance and retract, The other seal block can be formed with a relief groove into which the cutter blade advanced from one seal block can enter. According to this end seal / cutter device, the seal block is provided with a slit or escape groove in which the cutter blade of the bag cutting cutter device can advance and retreat, so that a seal contour in accordance with the shape of the cutter blade can be obtained. Can do. The main body blade part can be cut off between packaging materials with end seals between adjacent bags, the corners of the bag are sealed to have a rounded seal contour, and the rounded branch blade part is packaged The packaging material is cut along the contour continuously from between the materials.

  In this end seal / cutter device, the end sealer is configured as a reciprocating sealer that is driven to reciprocate to and away from the packaging material, and the bag cutting cutter device operates in accordance with the reciprocating motion of the end sealer. And it can comprise as a cut-off cutter which cuts through the said cylindrical packaging material. The end sealer / cutter device can be configured as a type in which the end sealer and the bag cutting cutter device are reciprocally driven to approach and separate the seal block and the cutter blade from the packaging material. The end sealer is a cutter that reciprocates in the slit of one seal block when a slit corresponding to the cutter blade comprising the main body blade portion and the rounded branch blade portion is formed in a pair of seal blocks sandwiching the packaging material. The blade may be able to appear and retract in the escape groove of the other sealer block.

  In this end seal / cutter device, one or the other sealer block of the end sealer is attached to the cutter blade in a region lateral to each end position of the main body blade portion and between the rounded branch blade portions. A pressing pin can be provided that sandwiches the cut piece of the packaging material that is driven in and out in a direction parallel to the cutting direction and cut by the rounded branched blade portion with the seal block on the other side. Cutting waste is generated from the packaging material by the rounded cutting edge, but when no measures are taken, this cutting waste may enter the escape groove due to the advancement of the cutter blade and stop the machine. There is. Therefore, one or the other seal block of the end sealer is driven in and out in a direction parallel to the cutting direction of the cutter blade in a region between the rounded branched blade portions on the side of each end position of the main body blade portion. A holding pin can be provided. Since the pressing pin sandwiches the portion of the packaging material that becomes a cut residue with the mating seal block when the cutter blade operates, it can be prevented from entering the escape groove. After the cutter blade has been retracted, the cutting pin is retracted from the end sealer by retreating the holding pin.

  In this end seal / cutter device, in order to collect the waste pieces of the packaging material, a suction means having a suction port opened on the side of the end sealer or connected to a collection box provided below the end sealer Can be provided. When the scraps that have been pressed by the holding pins are released from the holding pins, they are sucked into a suction port that opens immediately or received by a collection box provided below the end sealer. It is sucked and collected by the connected suction means.

  This end seal / cutter device is formed by forming the packaging material into a cylindrical packaging material, filling the cylindrical packaging material with the product, and applying the end seal to the cylindrical packaging material to form a bag. The product can be applied to a bag making and filling apparatus for continuously producing a bag package in which the product is packaged in the bag. The bag making filling and packaging apparatus may be a vertical bag making filling and packaging apparatus in which the running direction of the cylindrical packaging material is the vertical direction, or a horizontal bag making filling and packaging apparatus in which the running direction of the cylindrical packaging material is the horizontal direction.

  The bag cutting cutter device according to the present invention is configured as a cutter device having an integrated cutter blade composed of the main body blade portion and the round-shaped branch blade portion as described above, so that the cutter blade is used as a normal cutter mechanism. By attaching to the operating mechanism in the same manner as the cutter blade provided, the preceding bag and the succeeding bag manufactured continuously from the packaging material are separated and cut, and at the same time, Corner cuts can be made. Since the cut bag is rounded at the corner, it can prevent the tip from being sharpened at the corner, and can hit the hands and fingers of people, especially children and the elderly. Can be mitigated or another bag can be prevented from being damaged. Further, according to the end seal / cutter device of the present invention, in the process of manufacturing a bag or a package continuously from a cylindrical packaging material, an R-cut is formed at the corner of the seal at the same time in a normal seal / cut operation. It is possible to provide a cutter device that makes it possible. In addition, the cutter blade is provided in one seal block so as to be able to advance and retract, and the other seal block is provided with a slit into which the cutter blade enters. Therefore, as in the case where the cutter blade is divided and arranged in each seal block, the cutter blade There is no possibility of collision between each other, and there is no possibility of uncut portions between the cutter blade portions.

  In addition, since the cutter blade is configured integrally with the main body blade portion and the rounded branch blade portion, it is not necessary to prepare a special cutting cutter for the round cut separately from the separating cutter. Furthermore, in order to absorb the misalignment between the cutting position and the horizontal seal cutter position, it is not necessary to configure with two parallel cutter blades of the horizontal seal cutter, and the bag cutting cutter device has a simple configuration and its operation. As a mechanism, a conventional operation mechanism can be used as it is without any particular change. Therefore, there is no need to manufacture and install a round forming cutter device as a separate device including a drive system and a transmission system from the seal device, and no space is required for installing the round forming cutter device. An increase in manufacturing costs of the bag making machine and the bag making filling and packaging apparatus can be suppressed. Furthermore, since the operation of the cutter device for forming the radius needs to be operated in synchronism with the seal device and the main cutter device when it is provided separately, the mechanism and operation software become complicated and the maintenance becomes complicated. However, the present invention can avoid the occurrence of these problems.

  Hereinafter, embodiments of a bag cutting cutter device and an end seal cutter device according to the present invention will be described with reference to the accompanying drawings. 1 is a plan view showing an example of an integrated cutter blade used in a bag cutting cutter device according to the present invention, FIG. 2 is a front view showing a cutting edge portion of the cutter blade shown in FIG. 1, and FIG. 3 is shown in FIG. 4 is a side view of the cutter blade, and FIG. 4 is an enlarged front view showing a part of the cutting edge portion of the integrated cutter blade shown in FIG.

  The integrated cutter blade 1 shown in FIGS. 1 to 3 includes a plate-like cutter body 2 having a blade edge portion 3, and a base fixed to the plate-like cutter body 2 on the opposite side of the blade edge portion 3 by a fixing tool 4. The end 5 is attached to the operating mechanism (see FIG. 5) of the seal / cutter device. In the illustrated example, in the blade edge portion 3, a large number of teeth 6 are connected to each other and arranged continuously over substantially the entire width of the cutter body 2 to form a continuous corrugated blade. The cutter blade 1 is applied to a bag cutting cutter device for separating and cutting a preceding bag and a subsequent bag continuously formed from a packaging material, preferably a cylindrical packaging material. It is used in a mode that protrudes straight to the side. When a large number of teeth 6 are pressed against the packaging material, the tip of each tooth 6 hits the packaging material in the form of dots, pierces the packaging material, and forms the starting point of cutting. When the cutter blade 1 further advances, the cutting of the packaging material by the teeth 6 proceeds from the starting point, and the packaging material can be cut through when the cutting is connected to each other.

  As shown in FIGS. 2 and 4, the cutting edge portion 3 of the cutter blade 1 branches from each other at an angle α corresponding to the substantially straight main body blade portion 7 on the center side and both end positions 8 and 8 of the main body blade portion 6. The rounded branched blade portions 9, 9 are integrally formed. When the main body blade portion 7 is applied to the cutting of a cylindrical packaging material in a flat state, the main body blade portion 7 can cut through an intermediate portion between both side edges. From one end position 8 of the main body blade portion 7, the two branch blade portions 9, 9 branch and extend in a direction away from each other, in other words, in a direction before and after the feeding direction of the cylindrical packaging material. Moreover, when applied to the cutting of the cylindrical packaging material, the tip 10 extends beyond both side edges of the cylindrical packaging material (see FIG. 4). When the bag cutting cutter device is operated, the main body blade portion 7 cuts through an intermediate portion between both side edges of the flat cylindrical packaging material and is branched from the main body blade portion 7. Simultaneously with the operation of the branch blade portions 9, 9, the cylindrical packaging material is cut into a round shape until reaching both side edges on each bag side. In the example shown in the drawing, the rounded branch blade portions 9 are provided at both ends of the main body blade portion 7 and extend in an arc shape in the range of the angle β and straightly in the other range. In this case, it is suitable when a three-side seal bag or a four-side seal bag is continuously manufactured in a vertically placed state and four corners are cut into rounded shapes. Further, the rounded branch blade portions 9 and 9 can be provided only on one side of the main body blade portion 7. In this case, for example, it is suitable when a bag such as a pouch is continuously manufactured in a horizontally placed state and the upper corner is cut into a round shape.

  In the bag cutting cutter device, the cutting mechanism to which the cutter blade 1 is to be attached may be a normal cutting mechanism without requiring any special device. The cutter blade 1 normally operates a normal cutting mechanism to separate and cut the preceding bag and the succeeding bag, and at the same time, performs a rounded cut at the corner of the bag with respect to the preceding bag and the succeeding bag. Each round-shaped branch blade portion 9 includes a straight portion at a tip portion, but generally extends in an arc shape, so that a round-shaped cut is formed at a corner portion of the bag. The separated and cut bags are cut in rounded shapes at the four corners.

  As shown in FIGS. 1 to 4, the main body blade portion 7 is provided with a notch forming blade 11 for forming a notch for easy opening on the bag. The notch forming blade 11 is provided in such a manner that it continuously protrudes laterally from the main body blade portion 7. In the order in which the notch for easy opening is formed in the cut edge portion of the bag at a later time, when the notch forming blade 11 tries to cut through the cut edge portion, the cut edge portion is pushed by the notch forming blade 11 and escapes. Therefore, it is difficult to form a good easy opening notch. Therefore, since the cutter blade 1 is used as a cut-off cutter, the notch forming blade 11 is provided to protrude forward from the main body blade portion 7 in the cut-off direction. By comprising in this way, the notch formation blade 11 cuts a cylindrical packaging material first, and forms the notch for easy opening. After that, the main body blade part 7 cuts through an intermediate part between both side edges of the cylindrical packaging material. As a result of adopting the arrangement of the notch forming blade 11 in such a manner that it continuously protrudes laterally with respect to the main body blade portion 7 and in a manner that protrudes forward from the main body blade portion 7 in the cut-off direction, As shown in FIG. 10, an easy-open notch having a notch opened at the edge portion formed by cutting the bag with the main body blade portion is formed automatically and satisfactorily.

  In the illustrated example, only one notch forming blade 11 is provided only on one side (the lower side in FIG. 2) of the main body blade portion 7 of the cutter blade 1. In this case, the notch for easy opening forms one notch for each cut bag. However, instead of this, a plurality of notch forming blades 11 may be provided on the same side. In this case, each bag is formed with a plurality of notches for easy opening at the same cutting edge. Further, the notch forming blade 11 may be provided on both sides of the main body blade portion 7. In this case, notches can be formed at both the top and bottom cut edges of the bag.

  The notch forming blade 11 is provided only on one side of the main body blade portion 7, but the region corresponding to the notch forming blade 11 of the main body blade portion 7, that is, the vicinity region including the portion where the notch forming blade 11 is provided. Is a curved portion 12 that is curved convexly toward the side where the notch forming blade 11 is provided. In relation to the notch forming blade 11, by making a part of the main body blade portion 7 a curved portion 12, in the manufactured bag, as shown in FIG. 10, the convex curved portion 12 of the main body blade portion 7. A notch 59 for easy opening extending further to the inner side, that is, the bag side, is formed from the recess 57 formed corresponding to the above. Therefore, since the corner portion of the formed easy opening notch 59 does not come out, unintentional opening of the bag that proceeds from the easy opening notch 59 is prevented, and the corner portion of the sharp notch The contact with the finger can be eased. However, when the notch forming blades 11 are provided on both sides of the main body blade part 7, if they are provided at the same position, the portions surrounded by the two recesses become chips, so in order not to generate such chips, the main body blade It is desirable that the position is shifted in the longitudinal direction of the portion 7. In the bag package (or bag) P, heat seal portions 52 and 53 are formed on the top and bottom of the main body 41, and cutting edges 54 and 55 are formed by the cutter blade 1. Each corner 56 is formed with a rounded cut. In the continuous production of the bag package (or bag) P, a convex portion 58 is formed on the cutting edge 55 side corresponding to the concave portion 57 on the cutting edge 54 side.

  FIG. 5 is a plan view showing an example of the seal-cutter device according to the present invention, partly broken away. The cutter blade 1 shown in FIGS. 1 to 4 is incorporated in the seal / cutter device 20 shown in FIG. The seal / cutter device 20 includes a frame 21 attached to an end sealer of a packaging machine, and an air actuator 22 as an operation mechanism. The output end of the air actuator 22 acts on the base end portion 5 to the end sealer. Thus, the cutter blade 1 can be moved back and forth straight with respect to the packaging material. The frame 21 is provided with air actuators 25 and 26 for advancing and retracting pressing pins 23 and 24 described later. The holding pins 23 and 24 can be advanced and retracted in the same direction as the cutter blade 1 as shown by arrows.

  FIG. 6 is a front view showing an example of a seal block used in an end sealer in which the seal / cutter device shown in FIG. 5 is incorporated. FIG. 6 shows an assembled state of only the cutter blade 1 in the seal / cutter device 20 shown in FIG. Of the two opposing seal blocks constituting the end sealer, one seal block 31 is formed with a plurality of parallel stripes 33a on the front seal surface 33 for ensuring sealing. The seal block 31 is formed with a slit 34 that conforms to the cross-sectional shape of the cutter blade 1 but that is slightly wider so that the cutter blade 1 can advance and retreat. The slit 34 includes a central slit 35a and four rounded branch slits 35b extending from both ends corresponding to the main body blade 7 and the four rounded branched blades 9. The cutter blade 1 moves back and forth between a position where the cutter blade 1 is completely retracted into the seal block 31 and housed therein and a position where the cutter blade 1 protrudes from the seal block 31 and performs a cutter operation as shown in the figure. The seal block 31 is largely divided into four parts by a slit 34, but is fixed to each other by a jig (not shown).

  FIG. 7 is a front view showing the other seal block of two opposing seal blocks constituting the end sealer. The other seal block 32 has a structure corresponding to the one seal block 31 shown in FIG. 6, and a plurality of parallel stripes 36 a for surely sealing are formed on the seal surface 36. Yes. The seal block 32 is formed with an escape groove 38 into which the cutter blade 1 protruding from the seal block 31 enters. The escape groove 38 includes a central escape groove 39a and four rounded branch relief grooves 39b extending from both ends thereof corresponding to the main body blade portion 7 and the four rounded branch blade portions 9. In the central escape groove 39a, a recess 39c is formed corresponding to the curved portion 12 of the cutter blade 1. When the cutter blade 1 enters the escape groove 38 during the manufacturing process of the bag, the packaging material is not sealed within the width of the escape groove 38 and remains as an unsealed portion that is not sealed along the cutting edges 54 and 55 in the bag. . The notch forming blade 11 forms a notch for easy opening in the unsealed portion.

  FIG. 8 is a perspective view showing an example of an operating state of the seal / cutter device shown in FIG. 5, and FIG. 9 is a schematic side view showing an example of the operating state. When the end sealer 30 applies a bag end seal across the packaging material F, a bag cutting cutter device (not shown) is activated, and the bag cutting cutter device is packaged in relation to the applied end seal. The material is cut, and each round-shaped branch blade portion 9 separates the bag and simultaneously cuts each corner into a round shape. At that time, the holding pins 23 and 24 advance from the seal block 31, respectively, and sandwich the scum f and f of the packaging material left outside the rounded branch blade portions 9 and 9 between the seal block 32. Holding down. When no countermeasures are taken, the wastes f and f may enter the escape groove due to the advancement of the cutter blade and stop the machine. Therefore, when the rounded branch blade portion 9 cuts the packaging material, the waste f of the packaging material is not dragged into the escape grooves 39b together with the rounded branch blade portion 9. When the seal blocks 31 and 32 start to separate from each other, the bag package P starts to drop immediately due to its own weight. At this time, the scum f, f of the packaging material starts to fall naturally away from the seal block 32 when the pressing pins 23, 24 begin to retract. Since the dropping speeds of the packaging materials f and f are slow due to air resistance or the like, they fall at a timing different from that of the bag package (bag) P. The pressing pins 23 and 24 and the operation mechanisms 25 and 26 thereof may be provided on the seal block 32 side instead of the seal block 31 side.

  As shown in FIG. 9, a collection box 43 connected to a vacuum for sucking and collecting the packaging waste pieces f and f can be provided below the end sealer 30 in order to collect the packaging waste pieces. . That is, by arranging an appropriate plate 41 and chute 42 below the end sealer 30, the cut pieces f, f are provided below the end sealer 30 by being released from the holding pins 23, 24. It is received by the collection box 43 and can be sucked and collected by a vacuum connected to the collection box 43. Instead of the above example, a suction duct is opened to the side of the end sealer 30, that is, in the vicinity of the longitudinal ends of the seal blocks 31 and 32, so that the wastes f and f of the packaging material are sucked to the side. May be.

  The R-cuttable cutter device according to the present invention has been described by taking a vertical bag-making filling and packaging device as an example. However, the present invention is not limited to this example, and can be realized, for example, in a horizontal bag-making filling and packaging device. It is. Obviously, the filling device is not necessarily required, and can be applied to an apparatus that produces only bags. When applied to a vertical bag filling and packaging device, the bag corner can be round-cut and a bag package can be manufactured continuously in a normal packaging process without providing a special process. it can.

It is a top view which shows an example of the integrated cutter blade used for the cutter apparatus for bag cutting by this invention. It is a front view which shows the blade edge | tip part of the cutter blade shown in FIG. It is a side view of the cutter blade shown in FIG. It is a front view which expands and shows a part of blade edge | tip part of the cutter blade shown in FIG. 1 is a plan view showing an embodiment of an end seal cutting apparatus according to the present invention, partially broken away. It is a front view which shows an example of one seal block used for the seal | sticker cutter apparatus shown in FIG. It is a perspective view which shows an example of the other seal block used for the seal | sticker cutter apparatus shown in FIG. It is a perspective view which shows an example of the operation state of the seal | sticker cutter apparatus shown in FIG. FIG. 6 is a schematic side view showing an example of an operating state of the seal / cutter device shown in FIG. 5. It is a front view which shows an example of the bag manufactured using the sealing / cutting apparatus shown in FIG. It is a perspective view which shows an example of the conventional vertical bag making filling packaging apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutter blade 2 Plate-shaped cutter main body 3 Cutting edge part 4 Fastening tool 5 Base end part 6 Tooth 7 Main body blade part 8, 8 Both-ends position 9 Round-shaped branch blade part 10 Tip 11 Notch formation blade 12 Curved part 20 Seal / cutter device 21 Frame 22 Air actuator 23, 24 Holding pin 25, 26 Air actuator 30 End sealer 31 Seal block 32 Seal block 33, 36 Seal surface 34 Slit 35a Central slit 35b Round-shaped branch slit 38 Escape groove 39a Central relief groove 39b Round-shaped branch relief Groove 41 Plate 42 Chute 43 Recovery box 52, 53 Heat seal part 54, 55 Cutting edge 56 Corner part 57 Concave part 58 Convex part 59 Notch for easy opening F Packaging material f Packaging material residue

Claims (11)

  In a bag cutting cutter device for separating and cutting a preceding bag and a succeeding bag continuously formed from a web-shaped packaging material, a main body blade portion that pierces an intermediate portion between both side edges of the packaging material in a flat state, and A bag cutting cutter device comprising a cutter blade comprising two rounded branched blade portions that are branched from at least one end on both sides of a main body blade portion and cut a corner portion of the packaging material.   2. The bag cutting cutter device according to claim 1, wherein the main body blade portion of the cutter is provided with a notch forming blade in such a manner as to continuously protrude laterally from the main body blade portion.   The bag cutting cutter device according to claim 2, wherein the notch forming blade is provided so as to protrude forward from the main body blade portion in the cutting direction.   The said notch formation blade consists of it being curved in convex shape toward the side of the side in which the said notch formation blade is provided in the vicinity area | region including the part in which the said notch formation blade is provided. The cutter device for bag cutting described in 1.   The bag according to any one of claims 1 to 4, wherein the blade edge portions of the main body blade portion and the rounded branch blade portion are formed as corrugated blades in which teeth are continuously arranged in the longitudinal direction. Cutting cutter device.   An end seal / cutter device in which the bag cutting cutter device according to any one of claims 1 to 5 is incorporated in an end sealer that applies an end seal for the bag across the packaging material.   The end sealer is composed of two seal blocks which are opposed to each other and can be moved toward and away from each other, and one of the seal blocks is formed with a slit for movably moving the cutter blade, and the other seal block is provided with the slit. The end seal / cutter device according to claim 6, wherein a relief groove into which the cutter blade that has advanced from one of the seal blocks can enter is formed.   The end sealer is configured as a reciprocating sealer that is driven to reciprocate toward and away from the packaging material, and the bag cutting cutter device operates in response to the reciprocating motion of the end sealer to form the tubular package. The end seal cutter device according to claim 6 or 7, wherein the end seal cutter device is configured as a parting cutter for parting through a material.   One or the other seal block of the end sealer protrudes and protrudes in a direction parallel to the cutting direction of the cutter blade in a region between the end positions of the main body blade portion and between the rounded branch blade portions. The end seal cutter apparatus according to claim 7, further comprising a pressing pin that is driven and is cut by the rounded branched blade portion so as to sandwich a chip of the packaging material between the seal block on the other side. .   In order to collect the waste pieces of the packaging material, a suction port is provided on the side of the end sealer, or suction means connected to a recovery box provided below the end sealer is provided. The end seal cutter apparatus according to claim 9. Forming the packaging material into a cylindrical packaging material, filling the product into the cylindrical packaging material, applying the end seal to the cylindrical packaging material to form a bag, and thereby placing the product in the bag The end seal cutter apparatus according to any one of claims 6 to 10, wherein the end seal cutter apparatus is applied to a bag making and filling apparatus for continuously producing a packaged bag package.

Images