JP2005262575A - Apparatus for producing gazette bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce torsion occurring in the rolled web of a mesh resin sheet. <P>SOLUTION: The mesh cylindrical rolled web W is made to be flat in the axial direction and to travel toward the front of a base 1. A core 11 is inserted into the rolled web W in its travelling course, and a pair of guide members 13 and 13 facing vertically is set in the core 11. Rotary disks 14a and 14b are inserted into the clearance between its both side edges 13a and 13a, and the rolled web W is pushed in the shape of a channel by its side rim to make it in the shape of a gazette. Since the rotational frequencies of the rotary disks 14a and 14b are made to be controlled independently corresponding to the torsion of the rolled web W, the torsion of the rolled web W can be corrected by making the rotational frequencies different. Since press plates 10 and 10 holding the rolled web W over its whole length in the width direction between them are set before and behind the core 11, the rolled web W is pushed by their plate surfaces 10a to suppress the occurrence of the torsion. Moreover, when both induction members 13 and 13 are made rotatable in a plane connecting the gazette-like parts on both sides of the rolled web W, the torsion can be corrected by making right and left loads different. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for manufacturing a gusset-shaped bag based on an original fabric of a mesh-cylindrical resin and a manufacturing method thereof.

  A so-called gusset bag formed of a material such as a film or a sheet is used in various situations such as packaging, transportation, and storage of goods. This gusset bag is folded inward along the axial direction from the top to the bottom of the circumferential surface of the cylindrical material with the top and bottom open, and the bottom of the bag is welded in that state. Closed and formed into a bag shape. Due to the processing into the gusset shape, there is a merit that the folded portion is interposed on the side surface of the bag, the rigidity is increased, the bag shape is stably maintained, and the capacity of the bag is increased. Techniques for forming such a gusset-shaped bag using a general material such as a film or sheet are disclosed in, for example, Patent Document 1, Patent Document 2, and the like.

  However, if the object to be stored in the bag is, for example, a vegetable or fruit that requires appropriate air permeability during storage, a material such as a film or sheet with poor air permeability may be used as the bag material. Is inappropriate. Therefore, in order to store such a product, a bag made of a net-like material formed of polyethylene resin or the like having excellent air permeability is useful. Furthermore, if this mesh-like resin is formed in the above-mentioned gusset shape, a bag having both merits of air permeability and shape stability can be obtained.

  By the way, the mesh-shaped resin generally uses an original fabric W in which a resin having a rhombic mesh pattern shown in FIG. As shown in FIG. 10 (b), the original fabric W is shaped such that a cylindrical mesh-like resin is pressed from both sides in the cylindrical radial direction and folded into a plane via the crease lines r and r on both sides. In this state, it is wound around the roll R.

In order to form a gusset bag from the original fabric W, first, the original fabric W is pulled out from the roll R by a necessary length, and the crease line r portion shown in FIG. 10 (b) is folded inward in the width direction of the plane. The gusset shape G is formed by folding only the eye depth d. Thereafter, for each length corresponding to a predetermined bag depth H, the original fabric W is heat-sealed to close the bag, and the bag closing portion or the vicinity thereof is cut with a cutter. A gusset bag W ₀ having a predetermined depth H shown in c) is formed.

  This gusset processing using a mesh resin can use an automatic material feed mechanism using a roller, such as the apparatus described in Patent Document 1 or Patent Document 2, because of the characteristics of the material of the mesh resin. In fact, the processing is actually performed manually. This is because the mesh-like resin is manufactured by a so-called expanding method, and the shape of the fibers in each direction constituting the mesh is not uniform as shown in FIG. That is, as the fibers n and n ′ of the mesh branched from one lattice point m shown in FIG. 11 (b) go in the material feeding progress direction Z, the fiber n going to the right side in the figure is the thickness of the material. This is because the fibers n ′ that curve upward in the direction and toward the left in the figure have a staggered arrangement that curves downward in the thickness direction of the material.

With the arrangement of the fibers, in the cross section A including the lattice point m shown in FIG. 11A, the fibers are evenly arranged with a uniform thickness in the width direction as shown in FIG. 11C. Similarly, in the cross section B shown in FIG. 11 (a), staggered fibers are arranged in the width direction as shown in FIG. 11 (d). The arrangement of the fibers is interposed on the surface W ₁ side and the back surface W ₂ side of the original fabric W over the entire circumference of the cylindrical resin.

  Since such a fiber arrangement exists, as shown in FIG. 11E, when the web W of the mesh resin is sent out by the driving roller and travels in the direction of the arrow Z, for example, the X-axis direction, Y A laterally asymmetrical action may occur in which the material is smoothly pulled in one of the axial directions while the other is relatively difficult to pull. This is because the concavo-convex shape of the fiber along each direction in the X-axis direction and the Y-axis direction is different, and the frictional resistance of the surface in each direction is different. This difference in frictional resistance is difficult to grasp quantitatively because it varies finely depending on the mesh spacing and shape, resin material characteristics, pigment type, and the like, and the fibers themselves constituting the mesh are twisted during the manufacturing process. Therefore, the magnitude relationship of the traction force between the X axis and the Y axis by the driving roller may vary. In addition, the non-uniform shape of the fibers in each direction constituting the mesh also causes a difference in the elongation rate of the resin in each direction for a predetermined tensile force.

For this reason, when the resin is pulled by the driving roller, there is a raw material W of the cylindrical resin, and in some cases, it gradually rotates around its circumference in the Y direction in the figure to cause twisting. Is twisted in the X direction in the figure. The gusset bag W ₀ formed in such a twisted state is not good in appearance, and the gusset portion G is twisted so that the bag does not stand up. For this reason, conventionally, when producing a gusset bag using the above-mentioned mesh-like resin, it is not possible to adopt a method of forming a bag of a long original fabric using a so-called automatic feed mechanism, and the work Most of them depended on manual work.

Patent Document 3 discloses a technique in which a core is inserted into an original fabric W of a cylindrical mesh resin, a gusset shape is imparted through the core, and twist is reduced.
JP-A-9-150469 JP 2001-18305 A JP 2002-361863 A

  As described above, in reality, most of the gusset processing work using the mesh-like resin is performed manually so that the bag is not twisted. Processing by manual work is very time-consuming and troublesome, and there is a tendency for variations in the size of each part of the finished product. In addition, if it is manufactured manually one by one, it cannot cope with mass production, which is a factor of high cost.

  Patent Document 3 discloses a technique in which this work is mechanized by an automatic feeding device having a core and a roller interposed therebetween. However, in order to cope with a change in products and materials that are diversified, in addition, in a flexible manner, An apparatus that can easily adjust the degree of twist according to the material is desired.

  Accordingly, an object of the present invention is to make it possible to efficiently produce a gusset bag without variation by reducing twisting generated in the material feeding process when a resin-made mesh gusset bag is manufactured.

  In order to solve the above-mentioned problems, the present invention provides an apparatus for forming a bag having a gusset shape while moving an original web of a mesh-cylindrical resin in its axial direction by a delivery means (drive mechanism). Various twisting prevention means were added so that the resin does not twist around the cylindrical surface as the resin moves in the axial direction, and the bag shape does not become distorted around the cylindrical surface.

  The specific structure of the device having the means for preventing twisting is to make the mesh cylindrical raw material flat in the axial direction toward the front of the base, and run the core in the raw material along the traveling route. Insert and press the original fabric into the groove shape on both sides of the core to form a gusset shape, and the gusset-shaped original fabric is fused and cut at the subsequent stage of the core to produce a mesh-shaped gusset bag of a predetermined length. It relates to the device. In this apparatus, the groove-like pressing means of the original fabric on both sides of the core is constituted by a rotating disk that forms the original fabric in a gusset shape with its side periphery positioned toward the side surface of the core, The rotational speeds of both rotating disks were independently controlled according to the twist of the mesh cylindrical resin material.

  In this way, when the raw material traveling in the axial direction by the feeding means tries to twist about the axis, the rotational speeds of both rotating disks are adjusted separately, and the speeds are made different. A force to twist in a direction opposite to the direction to twist can be applied. By this action of the rotating disk, the twisting force acting on the original fabric can be canceled to prevent the occurrence of twisting, and the original fabric can be moved straight. The rotation speed may be adjusted by separately controlling the motors that operate both rotating disks, or load means for giving resistance to the rotation may be used as each rotating disk or spindle, and its driving mechanism. It may be provided in any one of these parts, and each load means may be controlled separately.

  Furthermore, as another means for preventing twisting or the like, the side surface of the core may be rotatable within the flat original surface. Specifically, a pair of guide members are provided on the core, and both side edges of the guide members respectively form side surfaces of the core, and the groove-shaped pressing means of the original fabric on both sides of the core Is a structure that is inserted into the gap between the two guide members and is rotatable in a plane connecting the gusset-like portions on both sides of the original fabric.

  In this way, both end edges in the width direction of the guide member constituting a part of the side surface of the core are in the plane with respect to the axial direction which is the pulling direction of the original fabric due to the rotation of the guide member. The angle can be freely set so as to have an angle in either direction. By setting this angle, the original fabric that moves while sliding on both edges in the width direction of the guide member is moved between one end edge and the other end edge of the guide member by the sliding load (friction resistance). ) Can be different. For this reason, when the original fabric is pulled by the drive mechanism, it is possible to cause a difference in load between the one edge side and the other edge side of the original fabric. If the direction is set in the direction opposite to the direction of twisting, the twist of the original fabric can be corrected by means of a simpler structure.

  Furthermore, as a means for preventing torsion, etc., other than the rotating disk and the guide member, it is possible to adopt a configuration in which the original fabric is pressed by a pressing plate over the entire length in the width direction to prevent twisting. Specifically, a presser plate that sandwiches the original fabric from above and below across its entire length in the width direction is provided at the front, rear, or front and rear of the core of the original fabric travel path. The surface is in contact with the entire length in the width direction of the original fabric and is urged in the sandwiching direction.

  In this way, when the original fabric is pulled forward by the drive mechanism, when the original fabric is to be twisted, the presser plate holds the original fabric in a planar manner with the opposing plate surfaces. At this time, the original fabric before giving the gusset shape is supplied to the presser plate on the rear side (the side for supplying the original fabric) of the core, and the original fabric passes through the crease lines at both ends in the width direction. Therefore, the pressing force by the pair of plate surfaces is relatively easy to act on the crease lines at both ends. Also, the presser plate on the front side of the core (the side from which the original fabric is discharged) is supplied with the original fabric after giving the gusset shape, and the original fabric is folded at the gusset-shaped portions at both ends in the width direction. Since it is folded in a flat shape through the line of sight, the pressing force by the pair of opposing surfaces tends to act relatively on the crease line part of the both ends of the gusset shape, as in the case of the rear pressing plate.

  For this reason, when the original fabric is twisted around its axis (around the cylindrical original fabric) while moving in the axial direction due to the pulling of the drive mechanism, the plate surface of the pair of presser plates will have its biasing force. Accordingly, a pressing force is applied to both ends of the original fabric in the width direction, and both ends of the original fabric are pressed with a distance along the axial direction, that is, with the width of the presser plate. By pressing the original fabric with a distance along the axial direction in this way, the presser plate can correct the twist associated with the running and movement of the original fabric and always supply the original fabric straight in the axial direction. . Moreover, since the force tends to concentrate on the crease line at both ends of the original fabric, the effect of preventing twisting is remarkable. Furthermore, by arranging the presser plates on both the front and back sides in the axial direction across the core, twisting of the original fabric is hardly generated in the core portion that gives the gusset shape, and the guide member and the molded member give the gusset shape. Will be performed smoothly and reliably. In addition, by making it possible to adjust the urging force to the presser plate, the pressing force can be adjusted according to the degree to which the original fabric is twisted, so it is optimal for preventing twisting according to the material constituting the original fabric. Can be selected.

  As a means for preventing the next twisting or the like, when the raw material of the mesh cylindrical resin after giving the gusset shape to both ends is caused to travel in the axial direction by the feeding means, the feeding means includes three parallel rollers. What was comprised by providing in the width direction of an original fabric can be employ | adopted. The original fabric having the gusset shape passes above or below the central roller among the three rollers, and the front and rear rollers are arranged so as to pass in the opposite direction to the central roller. When the central roller is raised or lowered with respect to the front and rear rollers, the original fabric located on the rear side in the axial direction (source side of the original fabric) is moved to the front side in the axial direction (discharge side of the original fabric). Since the central roller returns to the original position, a slack corresponding to the height of the central roller is generated in the original fabric. The slack is drawn forward in the axial direction by another feeding means positioned further forward, and the drawing by the other driving device and the raising and lowering of the central roller act in conjunction with each other. In addition, the material pulling force by the other feeding means is prevented from being directly transmitted to the rear side, so that a kind of buffering function is performed between the preceding process and the preceding process. The twist preventing means in this configuration employs a spindle-shaped roller that gradually decreases in diameter from the center in the original width direction toward both ends in the three parallel rollers.

  In this way, the tensile force acting on the original fabric is the portion with the largest diameter of the spindle-shaped portion of the roller when passing through the center and front rollers, that is, the width direction of the original fabric. Since it acts so that it may go to the center, even if the force which tries to twist by the original fabric arises, the force can be canceled and the whole original fabric can be guided to the center of the width direction, and generation of twist can be prevented.

  Further, as a means for cutting the original web of the mesh cylindrical resin having gusset shapes at both ends, the raw material is pulled and moved by the feeding means positioned further forward, and the cut portion is drawn into the cutter portion and cut. In the case configuration, the blade shape of the cutter part adopts a configuration in which the center in the width direction of the original fabric forms an arc shape projecting to the rear side (source side of the original fabric) rather than the gusset shape portions at both ends Can do.

  The original fabric after the gusset shape is thickened at both ends in the width direction and thin at the center in the width direction. The feeding means for moving the original fabric in the axial direction is a thin center at both ends of the original fabric. Hold and pull stronger than the part. For this reason, since the degree of pulling by the feeding means differs depending on the position in the width direction of the original fabric, a situation in which the degree of progress in the axial direction is different may occur. If the original fabric is cut in such a situation where the degree of progression is different, the cut surface of the completed gusset bag will not be perpendicular to the axial direction but will be distorted or curved. The blade shape corresponding to the difference in the degree of progress is adopted. In other words, in correspondence with the difference in the degree of progression, the center part of the blade shape in the width direction of the blade is formed in an arc shape protruding to the rear side (feed side of the original fabric) rather than the gusset-shaped parts at both ends. The cut surface of the gusset bag after the pulling force is released can be close to a right angle to the axial direction.

  Since the present invention has been described above, when producing a resin-made mesh-like gusset bag, it is possible to reduce the twist generated in the feed process of the raw material which is the material thereof, and to easily adjust the gusset bag. Can be manufactured efficiently without variation.

  An embodiment of the gusset bag manufacturing apparatus of this embodiment is shown in FIGS. 1 to 10, and the gusset bag shown in FIG. 10 (c) is replaced with a polyethylene mesh cylindrical shape shown in FIGS. It is for manufacturing based on the raw fabric W made of resin. As shown in FIG. 1, the entire configuration of the apparatus is such that a roll R in which an original fabric W is folded in a flat shape and wound is the rearmost side of the apparatus line (on the side where the original fabric W is supplied, It is rotatably arranged on the right side in the figure. The raw fabric W supplied from the roll R via the supply device 8 is pulled by the feeding means provided on the base 1 and is guided to travel on the base 1 of the line. On the base 1, a gusset forming mechanism 2 is disposed on the side close to the roll R, and a label attaching device 30 shown in FIG.

Also, on the front side of the gusset forming mechanism 2 (on the side for discharging the original fabric, on the left side in the drawing), the buffer roller 20 which is one of the feeding means for running the original fabric W, and the gusset Fusing means 40 for sealing and fusing the original fabric W to which the gusset shape G is given by the forming mechanism 2 at a predetermined interval is sequentially arranged. Further, on the front side of the fusing means 40, a feeding means for pulling the original fabric W forward in the axial direction for running is appropriately interposed, and the original fabric W is cut at a predetermined position in the axial direction to form a bag. A production line is constituted by a cutting means 50 for forming a shape, a die-cutting means 60 for adjusting the outer shape according to the application, and a tray 70 from which the manufactured gusset bag W ₀ is discharged.

  Each process on the line of this gusset bag manufacturing apparatus will be described in order from the gusset forming mechanism 2.

  As shown in FIGS. 2 and 3, the gusset forming mechanism 2 is disposed on the upper surface of the base 1, and the base 1 has a horizontal rotating shaft 3 a orthogonal to the axial direction. A plurality of rollers 3 and support rollers 4 are arranged in parallel. On the base 1, the flat mesh-shaped resin web W is pulled by feeding means such as a buffer roller 20 positioned further forward of the gusset forming mechanism 2 and travels from the rear in the axial direction toward the front. The core 11 is inserted into the original fabric W in the middle of the travel route.

  As shown in FIG. 3, the core 11 is placed on the support roller 3, and a pair of sandwiching rollers 16 and 16 that rotate about a vertical axis are provided on the base 1. Oppositely arranged on both sides in the width direction (horizontal direction orthogonal to the axial direction). The sandwiching roller 16 is in contact with the side rollers 12 and 12 provided to project outward from both side surfaces 11a and 11a of the core 11, so that both rollers 12 and 16 rotate while sliding relative to each other. It has become. Due to this contact, the core 11 is constrained so as not to move in the width direction of the line, and the axis of the rotation shaft of the sandwiching rollers 16 and 16 is the axis of the rotation shafts 12a and 12a of the side rollers 12 and 12, respectively. It is restrained so that the core 11 is located slightly forward from the heart and slightly outside, so that the core 11 does not move forward. A horizontal support roller 3 ′ is also provided on the upper surface of the core 11 so as to face the lower support roller 3.

  At the front and rear of the core 11 in the axial direction, there are provided press plates 10 and 10 for sandwiching the original fabric W from above and below over the entire length in the width direction. The plate surfaces 10a, 10a facing each other are in contact with the original fabric W over the entire length in the width direction of the original fabric W, and by a spring S fitted to the support shaft 10b that supports the holding plate 10 on the base 1, The plate surface 10a is urged in a direction to sandwich the original fabric W. This urging force can be adjusted by an adjusting screw 10c on the upper surface of the pressing plate 10.

  Further, as shown in FIG. 2, the core 11 has a pair of parallel plate-like guide members 13 and 13 opposed in the vertical direction at the front end thereof. The side edges 13a and 13a in the width direction are located on the front side of the side rollers 12 and 12 and part of the side faces 11a and 11a of the core 11, respectively. In addition, as shown by the arrow in FIG. 9a, both the guide members 13 and 13 can each slide the position of the edge 13a in the width direction.

  On both sides of the guide member 13 in the width direction, opposed pairs of horizontal rotating disks 14 a and 14 b are rotatably attached to the base 1 via a rotating shaft 15, and a motor M is attached to the rotating shaft 15. The driving force is transmitted. The pair of rotating disks 14a and 14b are inserted from the side surface side of the core 11 toward the center in the width direction in the gap between the guide members 13 and 13 opposed in the vertical direction. By this insertion, the side peripheral edges of the rotary disks 14a and 14b are positioned toward the side surface of the core 11, and the groove-like shape in which both ends in the width direction of the raw fabric W passing through the outer periphery of the core 11 are formed in the gusset shape G. It functions as a pressing means. In addition, the amount of insertion of the rotary disks 14a and 14b from the edges of the guide members 13 and 13 to the inside is equal to the depth d of the gusset shape shown in FIG.

  In addition, both the rotating disks 14a and 14b can be adjusted separately by controlling the rotation of the motor M. Further, in the hollow portions provided in the rotating shafts 15 and 15, A support shaft (not shown) leading to the base 1 is inserted. A spring S is fitted on the upper part of the rotary shaft 15, and the spring S takes a reaction force against the support shaft and presses the plate surfaces of the rotary disks 14 a and 14 b with the urging force of the spring S. . This urging force can be adjusted by an adjusting screw 15c at the upper end of the support shaft.

  Next, in front of the gusset forming mechanism 2, the buffer roller 20 is interposed between the gusset forming mechanism 2 and the fusing means 40 which is the next step.

  The shock-absorbing roller 20 is a feeding means for pulling and driving the original fabric W after the gusset forming mechanism 2 imparts the gusset shape G to the front in the axial direction, and further pulling by the other feeding means interposed in front of it. A buffer function is provided to prevent the force from being transmitted to the raw fabric W in the gusset forming mechanism 2. The structure is such that three parallel rollers 21a, 21b, and 21c are provided horizontally in the width direction of the original fabric W. As shown in FIG. 3, the original fabric W having the gusset shape G is Of the three rollers 21a, 21b, and 21c, they pass above the central roller 21b, and the front and rear rollers 21a and 21c are arranged to pass below. The three rollers 21a, 21b, and 21c are each supported by the bearing of the base 1 and can rotate around the shaft, and only the central roller 21b can be moved up and down.

In front of the buffer roller 20, the fusing means 40 and a pulling roller 5 comprising a pair of upper and lower rollers 5a and 5a are provided. Further to the front, cutting means 50 that cuts the original fabric W with the gusset shape G into a bag shape by cutting it at a predetermined position in the axial direction, and the upper and lower sides separately from the pulling roller 5. A pulling roller 6 composed of a pair of rollers 6a, 6a is provided and sent to a die cutting means 60 which is the next step. In this type Nukite stage 60, a gusset bag W ₀ which is raw W or cutting by stamping, for example, so that the trim to the outer shape corresponding to the purpose, such as a handle. The pulling rollers 5 and 6 are driven by a motor M shown in FIG. 3 via a sprocket and a chain (not shown), and the original rollers sandwiched between the upper and lower rollers 5a and 5a and the upper and lower rollers 6a and 6a. The anti-W travels on the base 1 by being pulled by the rotation of the pulling rollers 5 and 6. Further, a discharge roller 7 is provided in front of the die cutting means 60 as a feed means for moving the completed gusset bag W ₀ to the tray 70. The discharge roller 7 is also composed of a pair of upper and lower rollers 7a and 7a. Similarly, it is driven by the motor M.

  Next, the manufacturing procedure of the mesh-like gusset bag by the said apparatus is demonstrated.

When the buffer roller 20 at the center of the base 1 is operated and the center roller 21b is raised with respect to the front and rear rollers 21a and 21c as shown by arrows in FIG. Pull and move forward in the axial direction.
At this time, the front side of the original fabric W is held so as not to move by the fusing means 40 or the like, and the support rollers 3, 3 ′, 4 are respectively moved to the original fabric W on the rear side of the original fabric W. Since it slides, each support roller 3, 3 ', 4 rotates following the movement. By this rotation, friction generated when the original fabric W travels on the upper surface and the lower surface of the core 11 is reduced, and the original fabric W smoothly passes through the outer periphery of the core 11. Further, also on the side surface of the core 11, the clamping roller 16 and the side roller 12 are in rotational contact with the original fabric W so that the original fabric W passes smoothly.

  At this time, the raw fabric W forms flat surfaces on both side surfaces along the core side surfaces 11a and 11a, and in addition, both the rollers 12 and 16 slide, and the flat surfaces, particularly Since the portion where the crease line r of the original fabric W intervenes is further flattened, there is an effect that the side edges of the rotating disks 14a and 14b are likely to reach the both side surfaces of the original fabric W.

  Further, as the original fabric W travels, the roller 8b at the center of the supply device 8 behind the gusset forming mechanism 2 rises in the direction of the arrow shown in FIG. 1 by a height corresponding to the movement amount of the original fabric W. It is supposed to be. By this rise, the tensile force of the raw fabric W is absorbed by the reduction of the sag of the raw fabric W in the supply device 8 and prevents the tensile force from acting directly on the roll R. This is because, when the original fabric W is pulled, if a force is applied to the rear roll R via the pulled original fabric W, an unnecessary load is generated on the original fabric W, causing a twist. When the required amount of the original fabric W is sent out and the roller 8b is raised to a certain height, the sensor detects this, and the roller 8b is lowered and the motor of the roll R is operated to move the original fabric W into the roll R. Then, the sag is reduced to the original state. For this reason, when the original fabric W travels in the gusset forming mechanism 2, no force is always applied to the roll R on the rear side of the supply device 8.

  The raw fabric W passing through the outer periphery of the core 11 passes between the sandwiching roller 16 and the side roller 12 and then reaches the portions of the guide members 13 and 13 of the core 11. At this time, since the horizontal rotating disks 14a and 14b whose side peripheral edges are directed to the side surface of the core 11 are interrupted between the guide members 13 and 13 from both sides, as shown in FIGS. The anti-W is pressed into a groove shape from both sides. Since the original fabric W travels along the both end edges of the both guide members 13, by pressing, the side edges of the rotary disks 14a and 14b and the both end edges of the guide members 13 and 13 are used as shown in FIG. The gusset shape G shown in c) is given.

  The details of the process of applying the gusset shape G are shown in FIG. The original fabric W moves from the vicinity of the cross section in the vicinity of the sandwiching roller 16 and the side roller 12 shown in FIG. 5A to the vicinity of the guide member 13 shown in FIG. 5B, and the original fabric W is wound around the roll R. The rotating disks 14a and 14b are assigned to the vicinity of the crease line r at the time of being formed, and are pressed inward as shown in the figure to form a gusset shape G shown in FIG. At this time, when the raw fabric W traveling is about to twist about the axis (in the direction indicated by arrow a or b in the figure), in order to apply a force to twist in the direction opposite to the direction to twist, The speed at which both the rotating disks 14a and 14b rotate around the rotation axis (indicating the direction of the arrow c or d in the figure) is adjusted separately by controlling the motor M or adjusting the adjusting screw 15c to the speed. Differences can be made. Due to this difference in rotational speed, it is possible to apply a force in the opposite direction to the force to be twisted acting on the original fabric W to cancel the force, thereby preventing the occurrence of twist. This is because if the rotational speed of one of the rotating disks is increased, the original fabric W is drawn toward the increased rotating disk.

  Further, on the front and back of the core 11 in the axial direction, there are provided press plates 10 and 10 for pressing the original fabric W with the two plates sandwiched in the vertical direction, respectively. It is pressed by the urging force of the spring S fitted in 10b, and the original fabric W traveling with the flat plate surfaces 10a, 10a facing each other is pressed and held in a plane. At this time, in the presser plate 10 on the rear side of the core 11, the original fabric W is in the state shown in FIG. 6A, and in the presser plate 10 on the front side of the core 11, the original fabric W Is in the state shown in FIG. The original fabric W is pressed over the entire length in the width direction by the pair of plate surfaces 10a and 10a while traveling in the axial direction indicated by the arrow e in FIG. 6C, and in particular, the crease line r and the gusset. It is strongly pressed at both ends in the width direction of the original fabric W in which the shape G is present, that is, in the vicinity of the line connecting op and the line connecting qr in the drawing. Therefore, for example, if an attempt is made to twist about the axis in the direction of the arrow f or g in the same figure (around the circumference of the cylindrical original fabric W), the original fabric W has its both ends in the width direction op-p in the figure. And the support line connecting q-r with a distance in the axial direction, and the support line has an angle with respect to the twist direction, so that the presser plate 10 tries to twist the original fabric W. It is possible to correct the movement of the original fabric W so as not to be twisted by pressing down the force to be applied. Further, since the plate surfaces 10a, 10a hold the original fabric W by the entire surface, the original fabric W is pressed by an appropriate pressure with the elastic force of the spring other than both ends of the original fabric. The anti-W can be restrained so as not to twist. In this way, the raw fabric W can be supplied straight in the upper axis direction of the base 1.

  The urging force by the spring S of the presser plate 10 can be adjusted by turning the adjusting screw 10c at the upper end of the support shaft 10b. By this adjustment, the pressing force is adjusted according to the degree of the original fabric W to be twisted. it can. For this reason, it is possible to select an urging force optimal for preventing torsion in accordance with the material constituting the raw fabric W and other conditions.

  Further, the guide member 13 and the guide member 13 ′ located behind the core 11 shown in FIG. 9A have both end edges 13 a, 13 a and The positions of both end edges 13'a and 13'a are moved in the width direction so that the width of the core 11 can be adjusted. For this reason, it can respond to the original fabric W having different widths. Further, by adjusting the sliding amount of the end member of the guide member 13 and the guide member 13 ′ separately and setting the side surface 11a of the core 11 to an arbitrary position separately on the left and right, the core 11 is The moving load (friction resistance) due to sliding of the raw fabric W can be different on both sides in the width direction. In this way, the sliding load is different between the one edge side and the other edge side of the original fabric W, so that the twist of the original fabric W can be corrected.

In addition, in this gusset formation mechanism 2, the label sticking apparatus 30 shown in FIG. The label, as shown in FIG. 10 (c), a label L affixed by welding to the side surface of the gusset bag W _0. On the core 11, a label supply unit 33 is provided to draw out the label L from a roll (not shown) wound with a long label L. As shown in FIG. The rotating roller 32 operates a label L feeding device (not shown) provided in the label supply unit 33 in conjunction with it. Due to the function of this feeding device, a long label L is fed in the same direction as the raw fabric W travels in the axial direction, and the fed label L is directly below the pressing plate 31 in the figure. It is guided to a support plate 11b provided on the upper surface of the child 11. Then, by lowering the pressing plate 31 to the support plate 11b by the lifting mechanism, the label L is pressed against the surface of the original fabric W on the support plate 11b, cut into an appropriate flow and fused at a predetermined place, A label L is attached to each unit bag. The pressing plate 31 is movable in the axial direction with respect to the base 1, and the support plate 11 b of the core 11 is also slidable and movable in the axial direction of the core 11. The pasting position can be adjusted.

After passing through the gusset forming mechanism 2 and the buffer roller 20, the original fabric W is pulled by the pulling roller 5 and is fused at a predetermined interval in the axial direction by the fusing means 40. This fusion is performed with a predetermined width over the entire length in the width direction, and the predetermined interval corresponds to the height H of the gusset bag W ₀ . At the time of pulling by the pulling roller 5, as shown in FIGS. 7A to 7D, the central roller 21b of the buffer roller 20 descends almost synchronously, and the original fabric W moves in the axial direction. Causes a sagging equivalent to the amount. For this reason, the tensile force of the original fabric W by the pulling roller 5 does not act on the gusset forming mechanism 2 side, and an unnecessary unnecessary tensile force is applied to the original fabric W in the process of applying the gusset shape G around the core 11. Do not act. Not applying an unnecessary tensile force to the original fabric W traveling in the gusset forming mechanism 2 can also contribute to preventing the original fabric W from being twisted.

After passing through the fusion means 40, the original fabric W is further fed forward by the pulling roller 5 shown in FIG. 3 and cut by the cutting means 50 at predetermined intervals in the axial direction. This cutting is performed over the entire length in the width direction, the cutting line is located in the vicinity of the fusion part, and the original fabric W after cutting has a bag shape in which one end surface is closed and the other end surface is opened. Become. At this time, as shown in FIGS. 2 and 8, the blade shape of the cutter unit included in the cutting means 50 is an arc shape in which the center in the width direction of the raw fabric W protrudes rearward from the gusset shape G portions at both ends. It is made. This is because the raw fabric W after the gusset shape G is applied is thick at both ends in the width direction and thin at the center in the width direction, and when the pulling roller 6 grips the raw fabric W, the thick end portions are thin at the center. This is because it will be held and pulled stronger than the part. That is, the original fabric W is strongly pulled at both thick end portions, and the mesh extends in front of the central portion. Therefore, the blade shape corresponding to the extent of the original fabric W is adopted. is there. By this cutting, the original fabric W is formed in a flat cylindrical shape and both end surfaces are closed by fusion, and the cut surface is axially opened when the tensile force of the original fabric W is released. Since it is almost a straight line orthogonal, the gusset bag W ₀ is finished neatly.

After passing through the cutting means 50, the original fabric W is further fed forward by the pulling roller 6 and guided to the die cutting means 60. In this die cutting means 60, in order to adjust the finished product of the gusset bag W ₀ shown in FIG. 10 (c), one axial end face fused and cut in the previous step is die cut, The handle is formed. This die cutting step may be used in combination with the above-described cutting step by the cutting means 50, but usually the cutting means 50 and the die cutting means 60 are selectively used according to the shape of the product.

  The original fabric W is maintained at a relatively high temperature by fusing in the previous process, and the original fabric W has an effect of further stabilizing the gusset shape G by being heated and pressed. Even after passing through 5 and 6 and reaching the die-cutting means 60, the air is still maintained at a relatively high temperature by the air blow by the cooling device 51. When the die is cut in this state, the original fabric W is pushed by the die to be stretched, and the die may not be neatly drawn. For this reason, an oiling device is provided in the die-cutting means 60 so as to lubricate the surface of the mold that moves up and down as needed.

The gusset bag W ₀ completed through the above steps is further dropped into the tray 70 by the discharge roller 7 in front of it and collected. The pulling roller 6 and the mold Nukite stage 60, since the axial mutual spacing of such discharge roller 7 is adjustable, may be adjusted the interval in accordance with the height H of the gusset bag W _0.

In this embodiment, the guide members 13 and 13 ′ can slide in the width direction within the plane. However, the present invention is not limited to this embodiment, and the guide members 13 and 13 ′ are fixed to the core 11. A configuration may also be employed. Further, the guide members 13 and 13 ′ are rotated horizontally in the plane, that is, in the plane connecting the both side gusseted G portions of the raw fabric W, for example, as shown in FIG. As an option, the upper and lower guide members 13 and 13 may be rotated separately and set at different angles. By the rotation of the guide members 13 and 13 ′, any width direction both end edges of the guide member constituting the side surface outer edge of the core can be freely set so as to have an angle in one direction with respect to the axial direction. Can be set to angle. By setting this angle, the raw fabric W can have different movement loads (friction resistance) due to sliding between one end edge of the guide members 13 and 13 ′ and the other end edge. The twist of the original fabric W can be corrected by making a difference in the load between the one edge side and the other edge side of the original fabric.
Further, the urging and pressing method of the rotating shaft 15 that applies a load to the rotation of the rotating disks 14a and 14b, and the urging and pressing method of the presser plate 10 are not limited to this embodiment, and are well-known urging and pressing methods. Can be adopted. Even if the presser plate 10 is installed only on either the front side or the rear side of the core 11, it has an effect of preventing torsion. Therefore, the presser plate 10 may be selectively arranged on the front side, the rear side, or the front and rear sides according to the purpose.

  Further, the buffer roller 20 may have a configuration in which the vertical positional relationship between the rollers 21a, 21b, and 21c and the original fabric W is turned upside down, and the operational effects thereof are the same. It should be noted that each of the above-mentioned holding means 10, rotating disks 14 a and 14 b, guide member 13, buffer roller 20, and the like can be prevented from twisting the original fabric W alone, so that this implementation is possible. All may be used in combination as in the form, or any one or a plurality may be extracted and installed. When the rotating disks 14a and 14b are not used due to the combination, a groove-like pressing means may be employed instead, and the rotating disks 14a and 14b having a driving force or rotating only at a constant speed may be used. Other pressing members may be attached to the base 1.

  Moreover, each process of the fusion | melting means 40 shown in this embodiment, the cutting | disconnection means 50, and the die cutting means 60 is for manufacturing the gusset bag of a specific specification, The order and content of each process are as follows. It can be changed freely according to the form and specifications of the desired gusset bag.

Side view of one embodiment The principal part top view of the same embodiment Side view showing the main part of the same embodiment The perspective view which shows the principal part of the embodiment Explanatory drawing which shows the situation at the time of giving a gusset shape to an original fabric Explanatory drawing showing the situation when pressing the original fabric with the presser plate The details of the buffer roller are shown, (a) (b) (c) (d) is a side view showing the operation, (e) is a perspective view Detailed view of die cutting means Detailed view of the core showing a mode in which the guide member is slidable Detailed view of the core showing a mode in which the guide member is rotatable It is a detailed view of the original fabric, (a) a state where it is spread out in a cylindrical shape, (b) is a state where it is wound around a roll, and (c) is a finished product of a gusset bag. The details of the original mesh-like resin are shown, (a) is an overall view of the mesh, (b) is an enlarged view of the mesh, (c) is an AA cross-sectional view of (a), and (d) is (a). BB sectional drawing of this, (e) is a perspective view which shows the condition pulled by a roller

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Gazette formation mechanism 3, 3 ', 4 Roller 5, 6 Pulling roller 7 Discharge roller 8 Feeding device 10 Holding plate 10a Plate surface 10b Support shaft 10c Adjustment screw 11 Core 11a Core side surface 12 Side surface rollers 13, 13 'Guide members 13a, 13'a End edges 14a, 14b Rotating disk 15 Support shaft 15c Adjusting screw 16 Nipping roller 20 Buffer roller 30 Labeling device 40 Fusing means 50 Cutting means 60 Die removing means

Claims (5)

The mesh cylindrical raw fabric W is flattened in the axial direction toward the front of the base 1, and the core 11 is inserted into the raw fabric W along the traveling path. In an apparatus for manufacturing a mesh-like gusset bag of a predetermined length by pressing the anti-W into a groove shape to form a gusset shape, and fusing and cutting the gusset-shaped original fabric W at the subsequent stage of the core 11;
The groove-like pressing means of the original fabric W on both sides of the core 11 is constituted by rotating disks 14a and 14b that form the original fabric W in a gusset shape with its side periphery positioned toward the side surface of the core 11. And the rotational speed of both the rotation disk 14a, 14b is controlled independently according to the twist of the mesh cylindrical resin raw fabric W, The manufacturing apparatus of the mesh gusset bag characterized by the above-mentioned. The mesh cylindrical raw fabric W is flattened in the axial direction toward the front of the base 1, and the core 11 is inserted into the raw fabric W along the traveling path. In an apparatus for manufacturing a mesh-like gusset bag of a predetermined length by pressing and bonding the anti-W into a groove shape to form a gusset shape, and fusing and cutting the gusset-shaped original fabric W at a subsequent stage of the core 11. A pair of guide members 13, 13 are provided, and both side edges of the guide members 13, 13 form side surfaces of the core 11, respectively, and a groove-like pressing means for the raw fabric W on both sides of the core 11. Is inserted into the gap between the guide members 13 and 13, and the guide members 13 and 13 are rotatable in a plane connecting the gusset-like portions on both sides of the original fabric W. Gazette bag manufacturing equipment. The mesh cylindrical raw fabric W is flattened in the axial direction toward the front of the base 1, and the core 11 is inserted into the raw fabric W along the traveling path. In an apparatus for manufacturing a mesh-like gusset bag of a predetermined length by pressing the anti-W into a groove shape to form a gusset shape, and fusing and cutting the gusset-shaped original fabric W at the subsequent stage of the core 11;
Holding plates 10, 10 that sandwich the original fabric W from above and below the entire length in the width direction are provided in front, rear, or front and rear of the core 11 of the travel path of the original fabric W. Is a plate-shaped gusset bag manufacturing apparatus characterized by being in contact with the entire length of the original fabric W in the width direction and being urged in the direction in which it is sandwiched. The mesh cylindrical raw fabric W is flattened in the axial direction toward the front of the base 1, and the core 11 is inserted into the raw fabric W along the traveling path. In an apparatus for manufacturing a mesh-like gusset bag of a predetermined length by pressing the anti-W into a groove shape to form a gusset shape, and fusing and cutting the gusset-shaped original fabric W at the subsequent stage of the core 11;
The feed means for feeding the original fabric W is provided with three parallel rollers 21a, 21b, 21c in the width direction of the original fabric W at the rear of the fusion and cutting process, and the original fabric having the gusset shape G. W passes above or below the central roller 21b among the three rollers 21a, 21b, 21c, and the front and rear rollers 21a, 21c pass in the opposite direction to the central roller 21b. The center roller 21b is moved up or down with respect to the front and rear rollers 21a and 21c, thereby moving the original fabric W located behind the center roller 21b forward in the axial direction. Returning to the original position causes a sag in the original fabric W, and the sag is drawn forward in the axial direction by another feeding means positioned further forward. We have been,
The three parallel rollers 21a, 21b, and 21c are spindle-shaped rollers that gradually decrease in diameter from the center in the original fabric W width direction toward both ends, respectively. The mesh cylindrical raw fabric W is flattened in the axial direction toward the front of the base 1, and the core 11 is inserted into the raw fabric W along the traveling path. In an apparatus for manufacturing a mesh-like gusset bag of a predetermined length by pressing the anti-W into a groove shape to form a gusset shape, and fusing and cutting the gusset-shaped original fabric W at the subsequent stage of the core 11;
The cutting means draws the cut portion into the cutter portion while cutting and moving the original fabric by another feeding means positioned further forward, and the cutting edge shape of the cutter portion is the original shape. An apparatus for producing a mesh-like gusset bag, wherein the center in the width direction of the anti-W forms an arc shape protruding rearward from the gusset shape G portions at both ends.

Images