JP2019014507A - Packing machine having ultrasonic sealing device - Google Patents

Abstract

To provide a packing machine having an ultrasonic sealing device which makes a packing material in a tension state immediately before ultrasonic sealing, and performs the ultrasonic sealing after eliminating wrinkles so as to prevent sealing failures from occurring even if wrinkles occur to the packing material sent in the ultrasonic sealing device.SOLUTION: Wrinkle suppression rollers 17, 17 for clamping a packing material are provided in the upstream side that the packing material is sent in an ultrasonic sealing device 11. A peripheral velocity Vr1 of the wrinkle suppression rollers 17, 17 is set at a speed slower than a whole paper feeding speed Vf of the packing material. The packing material of a sealing scheduled region Rs becomes a tension state by a friction force caused by slippage occurring between the wrinkle suppression rollers 17, 17 and the packing material. Even if loosening or extension occurs to the packing material, the packing material is flattened by the tension state so as to suppress the occurrence of wrinkles, and ultrasonic sealing is performed in a state of suppressing the occurrence of wrinkles in the sealing scheduled region of the packing material, so that sealing failures can be avoided.SELECTED DRAWING: Figure 1

Description

  The present invention has an ultrasonic horn and an anvil disposed opposite to the ultrasonic horn, and applies ultrasonic waves in a pressurized state to a packaging material fed in an overlapped state between the ultrasonic horn and the anvil. By doing this, it is related with the packaging machine provided with the ultrasonic sealing apparatus which ultrasonically seals the said packaging material.

  2. Description of the Related Art Conventionally, as a seal of a packaging material that accommodates a package, there is a spot seal means that performs spot-like sealing on an overlapping portion of the packaging material. By linearly moving the spot seal means and the packaging material, a linear seal can be applied to the packaging material.

  There are electrical means such as high-frequency electricity as the spot seal means, but when the packaging material is a thermoplastic resin, the thermoplastic resin material is applied by applying fine ultrasonic vibration and pressure to the thermoplastic resin material. There is a sealing means by ultrasonic welding that melts and joins instantly. The ultrasonic welding (seal) device converts electrical energy into mechanical vibration energy, and applies pressure simultaneously with the vibration to generate strong frictional heat on the joint surface of the two thermoplastic resin materials, melting the resin. To be combined. The ultrasonic sealing device includes an ultrasonic horn that oscillates an ultrasonic wave at the time of sealing, and an anvil that sandwiches a thermoplastic resin material and is pressed strongly against the ultrasonic horn with pressure.

  As one of the joint applicants, the present applicant has proposed a bag-filling and packaging machine including spot seal means and using the spot seal means as an ultrasonic seal device (Patent Document 1). An example of a bag making filling and packaging machine provided with an ultrasonic sealing device is shown in FIGS. FIG. 5 is a perspective view showing an example of a bag making filling and packaging machine provided with an ultrasonic sealing device, and FIG. 6 is a transverse sectional view of a vertical sealing means used in the bag making filling and packaging machine shown in FIG.

  The bag making and filling machine 50 equipped with the ultrasonic sealing device shown in FIG. 5 and FIG. 6 is basically a belt-like packaging material Fw in a roll shape like a well-known vertical bag making and filling machine. The belt-shaped packaging material Fw is unwound from the winding roll Fr that is wound, and a feeding mechanism 51 that stores a part of the belt-shaped packaging material Fw and applies an appropriate tension, and an attachment device 52 such as a printing device that performs printing on the belt-shaped packaging material Fw. A former 53 for bending the continuously wound strip-shaped packaging material Fw into a substantially cylindrical packaging material, and a horizontal sealer 55, 55 for sealing the cylindrical packaging material Ft formed by vertical sealing in the transverse direction. A horizontal sealing means 54 provided and a metal (stainless steel) filling cylinder 56 fitted in the former 53 with a gap therebetween are provided.

  The former 53 bends the strip-shaped packaging material Fw into a substantially cylindrical shape, and has an effect of superimposing the side edge portions fe and fe of the packaging material bent into a substantially cylindrical shape at the lower front end. Both side edge portions fe and fe on which the packaging material is overlapped pass in the vertical direction in a state of protruding to the front side of the former 53. The vertical sealing means is a spot sealing means 60 that is disposed immediately below the former 53 and that welds the side edge portions fe and fe in a spot shape. The spot seal means 60 is applied as a center seal device that seals both side edge portions fe and fe of the belt-shaped packaging material Fw bent in a substantially cylindrical shape at the center in the width direction in the bag making and filling and packaging machine 50.

  The spot seal means 60 is an ultrasonic welding means, and includes an ultrasonic horn 61, an anvil 62, and an ultrasonic generator 63. The spot seal means 60 is provided in an accommodated state inside a rotating arm 65 that is rotatably provided by a hinge 66 on an attachment arm 64 attached to a machine frame (not shown). In order to operate the spot seal means 60, the rotating arm 65 is placed at the loading position shown in the figure. By rotating and retracting from the loading position, the packaging machine 1 can be set and maintained. The mounting arm 64 includes a screw mechanism 67 so that the rotating arm 65 and the hinge 66 can be moved forward and backward with respect to the former 53 together with the support 66a. The position of the spot seal means 60 with respect to the side edge portions fe and fe can be adjusted.

  The ultrasonic horn 61 and the anvil 62 of the spot seal means 60 are arranged side by side in the lateral direction intersecting the transport direction of the strip-shaped packaging material Fw. The ultrasonic horn 61 is a substantially rod-shaped body made of metal, and protrudes from the ultrasonic generator 63 on the base end side toward the anvil 62. The anvil 62 is a metal cylinder, and the circumferential surface faces the tip of the ultrasonic horn 61. The ultrasonic horn 61 and the anvil 62 can move relative to each other by moving the anvil 62 in a direction toward the ultrasonic horn 61 by a guide structure including an air pressure actuator and a slider, for example. When both approach and move, both side edge portions fe and fe of the strip-shaped packaging material Fw are sandwiched between the anvil 62 and the ultrasonic horn 61 with a predetermined pressure. By changing the force for moving the anvil 62, the pressure at the time of ultrasonic sealing can be changed. The ultrasonic vibration generated by the ultrasonic generator 63 acts on both side edges fe and fe of the packaging material bent into a substantially cylindrical packaging material sandwiched between the anvil 62 and both side edges fe, The fe are rubbed together and ultrasonic welding is performed. By adopting the spot seal means 60, the height dimension can be suppressed as compared with the case of a conventional bar-shaped vertical heat sealer.

  The paper feeding means is suction paper feeding means 70 that feeds paper while sucking the cylindrical packaging material Ft from the outside. Specifically, the suction paper feeding means 70 includes paper feeding belts 71 and 71 arranged to face both sides in the diameter direction of the cylindrical packaging material Ft. Each paper feed belt 71 is formed with a plurality of suction holes 72 arranged in a line in the longitudinal direction at the center in the width direction. Each paper feed belt 71 is wound around a feed drive pulley 73 driven by a motor, a feed driven pulley 74, and a guide pulley 75. A suction means (not shown) sucks air through the suction hole 72. Due to the driving force from the feed drive pulley 73, the paper feed belt 71 feeds the paper downwardly while contacting and sucking the cylindrical packaging material Ft sandwiched between the paper feed belt 56 and the outside from the outside. When the packaging material bent in a substantially cylindrical shape is fed relative to the spot seal means 60 by paper feeding, a vertical seal that is linearly continuous by the spot seal means 60 is provided on both side edge portions fe and fe. The packaging material is formed into a cylindrical packaging material Ft. The package is put into the cylindrical packaging material Ft subjected to the vertical seal through the filling cylinder 56, and is further subjected to the horizontal seal by the horizontal seal means 54, whereby the bag package Bp in which the package is enclosed is manufactured. The bag packaging body Bp is referred to as a bag packaging body made of a pillow bag having a vertical seal portion as a back-sealed seal portion.

  As an ultrasonic sealing device for a packaging machine, an ultrasonic horn and an anvil are both proposed as a rotary ultrasonic sealing device having a rotating disk-like structure (Patent Document 2). This ultrasonic sealing device forms a strip-shaped film into a cylindrical film, feeds the package to be conveyed and fed into the cylindrical film, and applies a top seal (end seal) before and after the package in the film feeding direction. Thus, in a horizontal bag-making filling and packaging machine that continuously manufactures a bag package, it is applied as a center seal device that seals both side edges that are overlapped in a cylindrical shape from a belt-like film.

  The center seal device includes an ultrasonic horn unit and an anvil unit that are arranged side by side in a lateral direction that intersects the transport direction of the belt-shaped packaging material. The ultrasonic horn unit includes a disk-shaped ultrasonic horn, and a driving source such as an ultrasonic wave generating converter and an amplification booster which are arranged below the ultrasonic horn and cause the ultrasonic horn to vibrate ultrasonically. The drive source is rotatably supported by the machine frame along with the ultrasonic horn. The ultrasonic horn vibrates so that its diameter expands and contracts by receiving the power of the drive source.

  The anvil unit includes a disk-shaped anvil in which ridges that continuously protrude in the circumferential direction are formed on the side peripheral surface. The ultrasonic horn and the anvil are configured to move relatively toward and away from each other, and when both move close to each other, the both sides of the belt-shaped packaging material between the protrusion of the disk-shaped anvil and the side surface of the ultrasonic horn. The end edge is clamped with a predetermined pressure. The anvil is supported by the moving bearing member, and the moving bearing member is further connected to the slider. The slider is guided so as to reciprocate linearly along a guide rail disposed so as to extend in the lateral direction intersecting the transport direction of the belt-shaped packaging material. With this guide structure, the moving bearing member, and thus the anvil, moves toward and away from the lateral direction, that is, toward the ultrasonic horn.

  The anvil is reciprocated by an actuator that operates with air pressure. The actuator is a dual stroke cylinder that is operated in two stages, thereby enabling quick reciprocation and control of a sealing pressure appropriate for ultrasonic sealing.

  In a packaging machine equipped with an ultrasonic sealing device having an ultrasonic horn and an anvil, there may be a situation in which an ultrasonic seal is forcibly applied to a packaging material in which wrinkles in a wavy state are generated. FIG. 7 shows both side edge portions of the packaging machine 80 including the ultrasonic sealing device 81 having the disk-shaped ultrasonic horn 82 and the disk-shaped anvil 83, in which the wrinkles Wr of the band-shaped packaging material Fw are overlapped and waved. “fe” and “fe” indicate a situation where the ultrasonic sealing device 81 is to be sent. When the belt-shaped packaging material Fw passes through the front end portions 53a and 53a of the former 53 disposed on the upper portion of the filling cylinder 56 and is bent into a substantially cylindrical shape, particularly the side edge portions fe and fe of the packaging material. The region including the region (scheduled region Rs) may not be neatly aligned due to slack or elongation, resulting in wrinkled wrinkles Wr.

  In addition, when the packaging material is a thin film, if there is a slight difference in the diameter of the disk-shaped horn and the disk-shaped anvil, even if the difference in the peripheral speed is small, the film can be fed. Wrinkles are likely to occur on the upstream side. Furthermore, when one side in the width direction extends from the other side and has a different length at the stage of film production, wrinkles are likely to occur when both edge portions are combined. As described above, when the wrinkled Wr is sent to the ultrasonic sealing device 81 without being eliminated and the ultrasonic sealing is performed, the wrinkled wrinkle Wr cannot be stretched flatly. The center seal Sc of the wrapping packaging material Ft is a cause of leaving poor seal Si that cannot be sealed due to insufficient seal.

JP2013-166580A JP 2017-071433 A

  Therefore, in a packaging machine equipped with an ultrasonic sealing device, even if wrinkles are generated due to slack or elongation in the planned sealing region of the packaging material fed into the ultrasonic sealing device, Immediately before the sealing, there is a problem to be solved in that the planned sealing region of the packaging material is stretched to be in a tensioned state, and the wrinkles are eliminated and sent to the ultrasonic sealing device.

  The object of the present invention is to provide a packaging material that is fed into an ultrasonic sealing device, even if wrinkles occur due to slack, elongation, etc., immediately before the ultrasonic sealing. The purpose of the present invention is to obtain a packaging machine equipped with an ultrasonic sealing device that prevents the occurrence of defective seals as much as possible by extending the planned sealing area to be in a tensioned state, eliminating wrinkles, and applying ultrasonic sealing.

  A packaging machine provided with an ultrasonic sealing device according to the present invention has an ultrasonic horn and an anvil disposed opposite thereto, and the ultrasonic horn and the anvil are relatively overlapped with each other. An ultrasonic sealing device that performs ultrasonic sealing on a moving packaging material, and an arrangement in which the packaging material is sandwiched between an upstream side where the packaging material is relatively fed into the ultrasonic sealing device or a downstream side where the packaging material is relatively fed out. Wrinkle restraining means provided, and the wrinkle restraining means applies frictional force due to slip to the packaging material, so that at least the upstream side of the packaging fed into the ultrasonic seal device It consists of putting the material in tension.

  According to the packaging machine provided with this ultrasonic sealing device, the packaging material in an overlapped state is relatively fed between the ultrasonic horn of the ultrasonic sealing device and the anvil disposed opposite to the ultrasonic horn. The packaging material is pressurized by the horn and the anvil, and an ultrasonic wave is applied to the packaging material, so that the packaging material is ultrasonically sealed. On the upstream side in which the packaging material is relatively fed or the downstream side in which the packaging material is relatively fed out of the ultrasonic sealing device, wrinkle suppressing means is provided in such a manner as to sandwich the packaging material. When the packaging material is moved relative to the ultrasonic sealing device, a slip is generated between the wrinkle restraining means and the packaging material in contact with the wrinkle restraining means, and the frictional force caused by the slip is generated. As a result, at least the upstream packaging material fed into the ultrasonic sealing device, that is, the packaging material including the planned sealing region is in a tension state. As a result, even if looseness or elongation that would cause wrinkles in the packaging material on the feeding side occurred, the slackness and elongation etc. were flattened by such a tension state, and the occurrence of wrinkles was suppressed, An ultrasonic seal is applied to the planned sealing region of the packaging material in a state where wrinkles are suppressed.

  The packaging machine provided with the ultrasonic sealing device further includes paper feeding means for feeding the packaging material, the ultrasonic sealing device is fixedly arranged, and the packaging material with respect to the ultrasonic sealing device is arranged. Relative movement can be provided by the paper feeding means. The ultrasonic sealing device is disposed at a fixed position with respect to the flow of the packaging material. Therefore, the relative movement of the packaging material with respect to the ultrasonic sealing device is all given by the paper feeding means.

In the packaging machine provided with this ultrasonic sealing device, the wrinkle suppressing means is provided on the upstream side where the packaging material is fed into the ultrasonic sealing device by the paper feeding means, and brakes the movement of the packaging material. And a wrinkle suppressing roller that is rotationally controlled in a manner in which the peripheral speed is synchronized with the paper feed speed of the packaging material by the paper feed means or is slower than the paper feed speed. it can.
When the wrinkle restraining means is provided on the upstream side where the packaging material is fed into the ultrasonic sealing device, the wrinkle restraining means is a friction resistance material that gives a brake to the movement of the packaging material, or a packaging material that has a peripheral speed of the paper feeding means. It is possible to provide a wrinkle-reducing roller that is rotationally controlled in a manner that is synchronized with or slower than the paper feed speed. The packaging material sent to the downstream side of the frictional resistance material or the wrinkle suppression roller is tensioned by the frictional resistance force by the frictional resistance material or the frictional force according to the speed difference between the faster paper feed speed and the lower peripheral speed of the wrinkle suppression roller. Even if it occurs in the packaging material on the upstream side fed into the ultrasonic sealing device, such wrinkles are eliminated, and the generation of wrinkles is suppressed. By synchronizing the circumferential speed of the wrinkle suppression roller with the paper feed speed of the packaging material by the paper feeding means, it is possible to suppress the occurrence of wrinkles due to the leveling action of the wrinkle suppression roller with respect to the seal material planned area of the packaging material.

In the packaging machine provided with the ultrasonic sealing device, the wrinkle suppressing means is provided on the downstream side where the packaging material is sent out from the ultrasonic sealing device by the paper feeding means, and the peripheral speed is the paper feeding means. The wrinkle-reducing roller that is rotationally controlled in a manner that is faster than the paper feed speed of the packaging material.
When a wrinkle suppression roller is provided on the downstream side from which the packaging material is sent out to the ultrasonic sealing device, the wrinkle suppression roller is made faster by making the peripheral speed of the wrinkle suppression roller faster than the paper feeding speed of the packaging material by the paper feeding means. The upstream packaging material is in tension due to the frictional force corresponding to the speed difference with the circumferential speed of the wrinkle suppression roller faster than the paper feed speed, and is temporarily generated in the upstream packaging material fed into the ultrasonic sealing device Even so, such wrinkles are eliminated, and the generation of wrinkles is suppressed.

In the packaging machine provided with this ultrasonic sealing device, the wrinkle suppressing means is provided on the upstream side where the packaging material is fed into the ultrasonic sealing device by the paper feeding means, and brakes the movement of the packaging material. A friction resisting material that gives a friction, or an upstream wrinkle suppression roller that is rotationally controlled in a manner in which the peripheral speed is synchronized with or slower than the paper feed speed of the packaging material by the paper feed means, and the paper feed The packaging material is provided downstream from the ultrasonic sealing device by means, and the downstream wrinkles are rotationally controlled in such a manner that the peripheral speed is higher than the paper feeding speed of the packaging material by the paper feeding means. It can be said that it is a restraining roller.
The wrinkle restraining means can be provided both on the upstream side where the packaging material is fed from the ultrasonic sealing device by the upstream paper feeding means where the packaging material is fed to the ultrasonic sealing device by the paper feeding means. By using a resistance material or an upstream wrinkle restraining roller and a downstream wrinkle restraining roller on the downstream side, it is possible to strongly act on the wrinkle restraining of the packaging material fed into the ultrasonic sealing device.

In the packaging machine provided with the ultrasonic sealing device, the packaging machine is provided with a former that bends the fed strip-shaped packaging material into a substantially cylindrical packaging material, and a cylindrical packaging material formed from the substantially cylindrical packaging material. It is a bag making filling and packaging machine provided with a lateral sealing means for performing lateral sealing, the paper feeding means is a feeding means for feeding at least the cylindrical packaging material in the longitudinal direction thereof, and the ultrasonic sealing device is the substantially cylindrical cylinder It can be said that it is applied as a vertical sealing means for forming the cylindrical packaging material by sealing both side edge portions of the cylindrical packaging material.
The bag-making filling and packaging machine forms a belt-shaped packaging material into a substantially cylindrical packaging material by a former, further forms it into a cylindrical packaging material by means of a vertical sealing means, sends a product to be packaged into the cylindrical packaging material, This is a packaging machine capable of producing a bag package continuously and at a high speed by applying a horizontal seal to the cylindrical packaging material by the sealing means. A bag package body that is applied as a vertical sealing means and that suppresses the generation of wrinkles can be manufactured while enjoying the advantages of the bag making filling and packaging machine.

  In the packaging machine including the ultrasonic sealing device, the ultrasonic sealing device can be moved by a driving unit with respect to the packaging material that is stopped, and the packaging material is relative to the ultrasonic sealing device. Movement can be provided by the drive means. The packaging material to be sealed is not sent by the feeding means and is fixedly arranged, for example, as a fixedly gripped bag. On the contrary, the ultrasonic sealing device is moved by the driving means. Therefore, the relative movement of the packaging material with respect to the ultrasonic sealing device is all given by the driving means for moving the ultrasonic sealing device.

In the packaging machine provided with the ultrasonic sealing device moved by the driving means, the wrinkle suppressing means is provided on the upstream side where the packaging material is relatively fed to the ultrasonic sealing device by the driving means. , A friction resistance material that applies a brake to the relative movement of the packaging material, or a peripheral speed that is synchronized with a relative paper feeding speed of the packaging material by the driving means or that is slower than the paper feeding speed. The wrinkle suppression roller can be controlled.
When the wrinkle restraining means is provided on the upstream side where the packaging material is relatively fed into the ultrasonic sealing device, the wrinkle restraining means has a friction resistance material that gives a brake to the relative movement of the packaging material or a peripheral speed. A wrinkle suppressing roller that is rotationally controlled in a manner that is synchronized with or slower than the paper feed speed of the packaging material by the paper feed means. The packaging material sent to the downstream side of the friction resistance material or the wrinkle suppression roller is a friction resistance force by the friction resistance material, or a friction force according to a speed difference between a faster paper feed speed and a slower peripheral speed of the wrinkle suppression roller, Even if the ultrasonic sealing device is in a tensioned state in the moving direction and is generated in the upstream packaging material fed relatively to the ultrasonic sealing device, such wrinkles are eliminated and the generation of wrinkles is suppressed. It becomes a state. By synchronizing the circumferential speed of the wrinkle suppression roller with the paper feed speed of the packaging material by the paper feeding means, it is possible to suppress the occurrence of wrinkles due to the leveling action of the wrinkle suppression roller with respect to the seal material planned area of the packaging material.

In the packaging machine provided with the ultrasonic sealing device moved by the driving means, the wrinkle suppressing means is provided on the downstream side where the packaging material is relatively fed out from the ultrasonic sealing device by the driving means, The wrinkle-reducing roller is rotationally controlled in such a manner that the peripheral speed is faster than the relative paper feed speed of the packaging material by the driving means.
When the wrinkle suppression roller is provided on the downstream side where the packaging material is relatively sent out to the ultrasonic sealing device, by making the peripheral speed of the wrinkle suppression roller faster than the moving speed of the ultrasonic sealing device by the driving means, The packaging material on the upstream side of the wrinkle suppression roller is in tension due to the frictional force according to the speed difference with the peripheral speed of the wrinkle suppression roller, which is faster than the moving speed of the ultrasonic sealing device, and is sent relatively to the ultrasonic sealing device. Even if they occur in the upstream packaging material, such wrinkles are eliminated, and the generation of wrinkles is suppressed.

In the packaging machine provided with the ultrasonic sealing device moved by the driving means, the wrinkle suppressing means is provided on the upstream side where the packaging material is relatively fed to the ultrasonic sealing device by the driving means. , A friction resistance material that applies a brake to the relative movement of the packaging material, or a peripheral speed that is synchronized with a relative paper feeding speed of the packaging material by the driving means or that is slower than the paper feeding speed. The upstream wrinkle suppressing roller to be controlled and the drive means are provided on the downstream side from which the packaging material is relatively sent out from the ultrasonic sealing device, and the peripheral speed is relative to the packaging material by the drive means. It can be said that it is a downstream side wrinkle suppressing roller that is rotationally controlled in a mode of making it faster than the paper feeding speed.
By providing wrinkle suppression means on both the upstream side where the packaging material is relatively fed to the ultrasonic sealing device and the downstream side where the packaging material is relatively fed from the ultrasonic sealing device, the wrinkle suppression is made to act strongly. Can do.

In the packaging machine provided with this ultrasonic sealing device, the ultrasonic sealing device is a disk-shaped ultrasonic horn having an ultrasonic sealing surface as a peripheral surface, and the anvil is the ultrasonic sealing surface. And a rotary ultrasonic sealing device which is a disc-shaped anvil having an anvil surface on its peripheral surface that can sandwich a packaging material to be bonded between the two.
Since the disk-shaped ultrasonic horn and the disk-shaped anvil are in contact with each other while rotating, the frictional resistance with the packaging material can be reduced, and the packaging material can be subjected to ultrasonic sealing, and each circumferential surface has a sequential contact position. Since it is not sandwiched between the packaging materials while being changed and the ultrasonic sealing is always performed on the same surface, deterioration due to the ultrasonic waves of the disk-shaped ultrasonic horn and the disk-shaped anvil can be greatly reduced.

In the packaging machine provided with the ultrasonic sealing device, the ultrasonic sealing device is a rod-shaped ultrasonic horn having a tip end surface as an ultrasonic sealing surface, and the anvil is connected to the ultrasonic sealing surface. It can be said that it is a fixed type ultrasonic sealing device which is a fixed anvil having an anvil end face capable of sandwiching a packaging material to be bonded between the two.
Since the fixed ultrasonic sealing device has no rotating part and has a simple structure, the manufacturing cost of the packaging machine can be kept low.

  Since the packaging machine provided with the ultrasonic sealing device according to the present invention is configured as described above, the relative moving speed of the packaging material with respect to the ultrasonic sealing device is determined by the paper feeding means or the driving means, so At least the packaging material (scheduled seal area) on the side relatively fed to the ultrasonic sealing device is in a tensioned state due to the frictional force caused by the slip generated between the means and the packaging material in contact with the wrinkle suppressing means. As a result, even when wrinkles are generated due to slack or elongation in the packaging material relatively fed to the ultrasonic sealing device, the generation of wrinkles is suppressed by the tension state of such packaging materials. The packaging material can be ultrasonically sealed in such a wrinkle-suppressed state. In this way, the seal planned area of the packaging material is stretched immediately before the ultrasonic sealing to make it tight, and after the wrinkles are eliminated, the packaging material is ultrasonically sealed, resulting in a seal failure as a bag package. It is possible to obtain a packaging machine equipped with an ultrasonic sealing device that prevents as much as possible.

FIG. 1 is a front view of an essential part of Embodiment 1 of a packaging machine provided with an ultrasonic seal unit according to the present invention. FIG. 2 is a front view of an essential part of Embodiment 2 of the packaging machine provided with the ultrasonic seal unit according to the present invention. FIG. 3 is a front view of an essential part of Embodiment 3 of the packaging machine provided with the ultrasonic seal unit according to the present invention. FIG. 4 is a front view of an essential part of a packaging machine having an ultrasonic seal unit according to a fourth embodiment of the present invention. FIG. 5 is a perspective view showing an example of a packaging machine provided with an ultrasonic sealing device. FIG. 6 is a cross-sectional view of the vertical sealing means used in the packaging machine shown in FIG. FIG. 7 is a front view showing an outline of a packaging machine provided with a conventional ultrasonic seal unit.

  Hereinafter, an embodiment of a packaging machine including an ultrasonic sealing device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view showing an embodiment (Example 1) of a packaging machine provided with an ultrasonic sealing device according to the present invention, and (a) is an example in the case where the wrinkle suppressing means is constituted by a roller. (B) is an Example in case a wrinkle suppression means is comprised with the brake which consists of a friction resistance material.

  In the embodiment of the packaging machine provided with the ultrasonic sealing device shown in FIG. 1A, as a basic packaging machine other than the vertical sealing means, a conventionally known vertical type as shown in FIG. 5 or FIG. It is a bag filling and packaging machine. Therefore, with respect to the vertical bag making filling and packaging machine itself other than the vertical sealing means, the former 53 that bends the fed strip-shaped packaging material Fw into a substantially cylindrical packaging material, and the cylindrical packaging formed from the substantially cylindrical packaging material. There may be provided a horizontal sealing means 54 for performing a horizontal seal on the material Ft, and a filling cylinder 56 fitted in the former 53 with a gap therebetween. The description will not be repeated.

  In the vertical bag making and filling machine 10 shown in FIG. 1 (a), for example, the band-shaped packaging material Fw fed out from the packaging material roll is formed by the former 53 so that both side edge portions fe and fe of the band-shaped packaging material Ft are in the shape of a palm. It is overlapped and bent into a substantially cylindrical packaging material so as to surround the filling cylinder 56. When the side edge portions fe and fe of the packaging material pass through the front end portions 53a and 53a of the former 53, wrinkles Wr are likely to occur due to slackness and elongation. Although not shown in FIG. 1, paper feeding means (equivalent to the suction paper feeding means 70 shown in FIG. 5) for feeding a packaging material such as a suction belt means is provided on both sides of the filling cylinder 56, for example. In cooperation with the filling cylinder 56, the cylindrical packaging material Ft is forcibly pulled down so that the packaging material (at least the cylindrical packaging material Ft. May be provided with means for feeding paper).

  In front of the filling cylinder 56 and below the installation position of the former 53, a rotary ultrasonic sealing device 11 is disposed as a vertical sealing means of the bag making filling and packaging machine 10. The ultrasonic sealing device 11 is fixedly arranged in the vertical bag making and filling machine 10 without moving in the paper feeding direction of the packaging material. The rotary ultrasonic sealing device 11 includes a disk-shaped ultrasonic horn 12 and a disk-shaped anvil 13 disposed opposite to the disk-shaped ultrasonic horn 12, and both side edge portions fe and fe of the substantially cylindrical packaging material are By the paper feeding by the paper feeding means, the circumferential surface 14 that is the ultrasonic sealing surface of the ultrasonic horn 12 and the circumferential surface 15 that is the seal receiving surface of the anvil 13 are fed in a superposed state. The ultrasonic horn 12 is sandwiched between the anvil 13 and the side edges fe and fe are in a pressurized state, and the ultrasonic wave generated by the ultrasonic horn 12 is applied, so that the ultrasonic seal is caused by frictional heat. Applied. By this sealing, the substantially cylindrical packaging material is formed into the cylindrical packaging material Ft.

  Below the installation position of the former 53 and above the installation position of the ultrasonic sealing device 11, that is, on the upstream side where the packaging material enters the ultrasonic sealing device 11 when viewed from the ultrasonic sealing device 11. A wrinkle suppressing roller unit 16 is provided. The wrinkle restraining roller unit 16 includes a pair of wrinkle restraining rollers 17 and 17 and sandwiches both side edge portions fe and fe of the substantially cylindrical packaging material between the peripheral surfaces of the rollers.

  The pair of wrinkle restraining rollers 17 and 17 constituting the wrinkle restraining roller unit 16 are not shown in the figure, but each is in an opposite direction by an appropriate drive motor with excellent controllability such as a servo motor and an appropriate power transmission mechanism. Rotated at synchronized speed. The peripheral speeds of the ultrasonic horn 12 and the anvil 13 of the rotary ultrasonic sealing device 11 are set to the same speed as the paper feed speed Vf of the packaging material. In the manufacturing process, it is difficult to avoid a slight error in the diameters of the ultrasonic horn 12 and the anvil 13, and when the packaging material is a thin film, the packaging is performed with a slight difference in peripheral speed. As already mentioned, wrinkles are likely to occur in the material. Further, the circumferential speed Vr1 of the wrinkle suppression rollers 17, 17 is set to the same speed as the paper feed speed Vf or a speed slower than the paper feed speed Vf.

  When there is a speed difference between the wrinkle-reducing roller unit 16 and the paper feed speed of the packaging material, the wrinkle suppression roller unit 16 exerts a braking action on the packaging material by the speed difference. That is, when there is a speed difference between the paper feed speed Vf of the packaging material and the circumferential speed Vr1 of the wrinkle suppression rollers 17 and 17 (the circumferential speed Vr1 is slower than the paper feed speed Vf), the paper feed of the packaging material is performed. Since the speed is maintained as a whole, slip occurs according to the speed difference between the wrinkle suppressing rollers 17 and 17 and the side edge portions fe and fe of the packaging material. Friction force acting in the direction resisting the feeding of the packaging material is generated in the portions fe and fe due to the slip. Therefore, the side edge portions fe and fe (scheduled sealing region Rs) of the packaging material existing between the wrinkle suppressing roller unit 16 and the ultrasonic sealing device 11 are flattened by slackness and elongation due to the tension generated by the frictional force. A tension state is created. As a result, even if wrinkles Wr are generated in the packaging material that has passed through the front end portions 53a, 53a of the former 53, the advance of the wrinkles Wr can be stopped up to the wrinkle suppressing roller unit 16. The side edge portions fe and fe of the packaging material in the planned sealing region Rs that have passed through the wrinkle suppressing roller unit 16 are fed into the ultrasonic sealing device 11 in a tension state in which the generation of wrinkles is suppressed. Since the ultrasonic sealing is correctly and sufficiently performed on the side edge portions fe and fe, the sealing failure due to the wrinkles Wr does not occur.

  Even if the circumferential speed Vr1 of the wrinkle suppression rollers 17 and 17 is the same speed as the paper feed speed Vf of the packaging material and there is no difference in speed, the leveling of the wrinkle suppression rollers 17 and 17 is not performed in the planned sealing region Rs of the packaging material. An effect occurs. Therefore, the generation of wrinkles Wr is sufficiently suppressed even if there is no speed difference, and an ultrasonic seal that is inferior is applied to the planned sealing region Rs.

  FIG. 1B is a partial view showing a modification in which a friction resistance material is used instead of the wrinkle suppressing roller as the wrinkle suppressing means in the embodiment 1 shown in FIG. Instead of the wrinkle restraining roller unit 16 comprising the wrinkle restraining rollers 17, 17, a friction resistance material unit 18 comprising a pair of friction resistance materials 19, 19 is arranged in such a manner as to sandwich the side edge portions fe, fe of the packaging material. . The frictional resistance members 19 and 19 correspond to those in which the peripheral speed is set to 0 by paying attention to the brake action of the wrinkle suppression rollers 17 and 17. By configuring the frictional resistance material 19 from a low-friction fiber material such as felt, it is possible to provide a stable running resistance that is not too strong for the packaging material, and to keep the packaging material fed smoothly. it can.

  Another embodiment (embodiment 2) of the packaging machine provided with the ultrasonic sealing device according to the present invention is shown in FIG. In the case of this example, the bag making and filling machine 20 has the same structure as that of the first embodiment shown in FIG. 1 except for the arrangement position of the wrinkle suppressing roller unit. The description is omitted by attaching. In the second embodiment, the wrinkle suppression roller unit 26 is provided on the downstream side from which the packaging material is sent out from the ultrasonic seal unit 11.

  The wrinkle restraining roller unit 26 includes a pair of wrinkle restraining rollers 27, 27 sandwiching both side edge portions fe, fe of the packaging material between them. Like the case of the wrinkle restraining roller unit 16, although not shown, A drive motor with excellent controllability such as a servo motor for rotating the holding rollers 27 is provided. Both wrinkle suppression rollers 27, 27 are rotated in opposite directions and at the same peripheral speed by an appropriate power transmission mechanism.

  In the case of Example 2, the circumferential speed Vr2 of the wrinkle suppression rollers 27, 27 is set to a speed higher than the paper feed speed Vf of the packaging material. By setting the speed in this way, a frictional force is applied based on the fact that the wrinkle suppressing rollers 27, 27 that try to rotate faster than the packaging material feed slide on the packaging material, and the wrinkle suppressing rollers 27, 27 The upstream packaging material is in tension. In other words, due to the characteristics of the ultrasonic sealing device 11, the packaging material can slide between the ultrasonic horn 12 and the anvil 13 even during the seal sandwiching the packaging material. The tension caused by the arranged wrinkle restraining rollers 27, 27 also extends to the portion of the packaging material on the upstream side of the ultrasonic sealing device 11 (the planned sealing region Rs up to the tip portions 53a, 53a of the former 53). A tension state can be created in the planned sealing region Rs of the packaging material.

  FIG. 3 is a front view showing an embodiment (Example 3) of a packaging machine provided with the ultrasonic sealing device according to the present invention. The third embodiment is an embodiment in which the wrinkle suppressing roller unit 16 shown in FIG. 1A and the wrinkle suppressing roller unit 26 shown in FIG. 2 are provided at the same time. Since the wrinkle suppressing roller units 16 and 26 are provided on both the feeding side and the feeding side of the packaging material with respect to the ultrasonic sealing device, it is possible to enhance the wrinkle suppressing action on the side edge portions fe and fe of the packaging material.

FIG. 4 is a diagram schematically showing an outline of a packaging machine having an ultrasonic sealing device according to Embodiment 4 of the present invention. Example 4 is an example of a type in which the packaging material is fixed and the ultrasonic sealing device is moved by the driving means. In Example 4, for example, the packaging bag that is held in a state where the position is fixed by the gripping members 33 and 33 is used as the packaging material, and the packaging film on the front and back of the packaging bag is overlapped by the moved ultrasonic sealing device. An ultrasonic seal is linearly applied to the part. In the bag packaging machines 30a, 30b, and 30c shown in FIG. 4, the ultrasonic sealing device and the wrinkle suppressing roller are the same as those used in the first embodiment, and the same reference numerals are given to the description again. Is omitted.

  In the bag packaging machine 30a shown in FIG. 4A, the wrinkle suppression roller unit 16 is disposed on the relative feeding side of the packaging material (packaging bag B) with respect to the ultrasonic sealing device 11. The ultrasonic sealing device 11 and the wrinkle suppression roller unit 16 are attached to the moving frame 31 while maintaining a relative position. The movable frame 31 can be driven back and forth in a direction (X direction which is the left-right direction on the paper surface) in which the opening portion of the packaging bag B extends by an appropriate driving means 32. The drive means 32 can be constituted by, for example, a servo motor and a conversion mechanism for converting the rotation thereof into a linear motion, or can be constituted by a fluid operated piston / cylinder device. As described above, the ultrasonic sealing device 11 and the wrinkle suppression roller unit 16 are unitized on the moving frame 31 as a whole, and are moved by the driving means 32.

  The disk-shaped ultrasonic horn 12 and the disk-shaped anvil 13 of the ultrasonic sealing device 11 are moved on the packaging bag B when the ultrasonic sealing device 11 and the wrinkle suppressing roller unit 16 are moved by the driving means 32. The peripheral speed is set to roll without slipping. Further, the circumferential speed Vr1 of the wrinkle suppressing rollers 17 and 17 of the wrinkle suppressing roller unit 16 is set to be slower than the moving speed Vd by the driving means 32. The function of suppressing wrinkle generation is basically the same as that of the first embodiment. That is, the wrinkle suppressing rollers 17 and 17 roll on the packaging bag B at a speed slower than the moving speed Vd, and the friction force caused by the slip based on the relative speed difference is applied to the packaging bag B by braking. As an effect. Accordingly, when viewed from the ultrasonic sealing device 11, the upstream packaging material (scheduled seal region Rs) on the relatively feeding side from the wrinkle suppression roller unit 16 is in a tension state, and the generation of wrinkles Wr is suppressed. Instead of the wrinkle suppression roller unit 16, a frictional resistance material unit 18 as shown in FIG. 1B can be used.

  In the bag packaging machine 30b shown in FIG. 4B, a wrinkle suppression roller unit 26 is disposed on the downstream side which is the relative delivery side of the packaging material (packaging bag B) with respect to the ultrasonic sealing device 11. In the case of the bag packaging machine 30b, the circumferential speed Vr2 of the wrinkle suppression rollers 27, 27 is set to be higher than the moving speed Vd by the driving means 32. By setting the speed in this way, a frictional force is applied based on the fact that the wrinkle suppressing rollers 27 and 27 that try to rotate faster than the movement by the driving means 32 slide on the packaging bag B, and the wrinkle suppression is achieved. The wrapping material on the upstream side of the rollers 27 and 27 is brought into a tension state including the scheduled sealing region Rs on the upstream side beyond the ultrasonic sealing device 11, and the generation of wrinkles Wr is suppressed.

  The bag packaging machine 30c shown in FIG. 4 (c) has a wrinkle suppressing roller unit shown in FIG. 4 (a) on the upstream side which is a relative feeding side of the packaging material (packaging bag B) with respect to the ultrasonic sealing device 11. 16 and a downstream side which is a relative delivery side, the wrinkle suppressing roller unit 26 shown in FIG. 4B is provided at the same time. Since the wrinkle suppressing roller units 16 and 26 are provided on both the feeding side and the feeding side of the packaging bag B relative to the ultrasonic sealing device 11, the wrinkle suppressing action on the packaging bag B can be enhanced.

  As described above, by providing a speed difference between the relative feeding speed of the packaging material and the speed of the wrinkle suppressing means, and creating a tension state in the planned sealing region of the packaging material by the frictional force caused by the speed difference, Even if wrinkles are about to be generated due to slack or elongation of the packaging material, the generation of wrinkles is suppressed by this tension state, and the packaging material can be fed into the ultrasonic sealing device without wrinkles. Therefore, since ultrasonic sealing is performed correctly and sufficiently, the packaging material does not cause a sealing failure due to wrinkles.

  In each of the above embodiments, the packaging machine is described as a type that does not move the components on the side of the packaging machine that sends the packaging material, or a type that does not feed the packaging material by moving the ultrasonic sealing device. However, the present invention can also be applied to a type of packaging machine that feeds the packaging material and simultaneously moves the ultrasonic sealing device. In particular, in Examples 1 to 3, an example in which the present invention is applied to a vertical bag making and filling machine has been shown, but the present invention is naturally applicable to a horizontal bag making and filling machine. . Furthermore, in each Example, although the rotary type ultrasonic sealing apparatus provided with the disk-shaped ultrasonic horn and the disk-shaped anvil was shown about the ultrasonic sealing apparatus, even if it is not disk-shaped, FIG. It is obvious that the present invention can also be applied to an ultrasonic sealing device having a rod-shaped ultrasonic horn or a fixed anvil as shown in FIG.

DESCRIPTION OF SYMBOLS 10,20 Vertical type bag making filling packaging machine 11 Ultrasonic sealing apparatus 12 Ultrasonic horn 13 Anvil 14 Perimeter surface (ultrasonic seal surface) 15 Perimeter surface (seal receiving surface) 15
16 Wrinkle suppression roller unit 17, 17 Wrinkle suppression roller 18 Friction resistance material unit 19, 19 Friction resistance material 26 Wrinkle suppression roller unit 27, 27 Wrinkle suppression roller 30a, 30b, 30c Bag packaging machine 31 Moving frame 32 Driving means 33, 33 Gripping member 50 Bag making filling and packaging machine 51 Feeding mechanism 52 Attached device 53 Former 53a, 53a Tip 54 Horizontal seal means 55, 55 Horizontal sealer 56 Filling cylinder 60 Spot seal means 61 Ultrasonic horn 62 Anvil 63 Ultrasonic generator 64 Installation Arm 65 Rotating arm 66 Hinge 66a Support body 67 Screw mechanism 70 Suction paper feeding means 71, 71 Paper feeding belt 72 Suction hole 73 Feeding drive pulley 74 Feeding driven pulley 75 Guide pulley 80 Packaging machine 81 Ultrasonic sealing device 82 Disk Ultrasonic horn 83 Disc-shaped anvil Fr Winding roll Fw Band-shaped packaging material fe, fe Both side edge portions Ft Cylindrical packaging material Rs Seal planned area Sc Center seal (vertical seal)
Wr Wrinkle Si Seal failure Vf Packaging material feed speed Vr1, Vr2 Wrinkle suppression roller peripheral speed B Bag Bp Bag package

Claims (12)

An ultrasonic sealing device that includes an ultrasonic horn and an anvil disposed opposite to the ultrasonic horn, and performs ultrasonic sealing on a packaging material that moves relatively in a superimposed state between the ultrasonic horn and the anvil. When,
Wrinkle suppression member means arranged in a manner to sandwich the packaging material on the upstream side where the packaging material is relatively fed to the ultrasonic sealing device or on the downstream side where the packaging material is relatively fed out, The means includes an ultrasonic sealing device that applies a frictional force due to slip to the packaging material, and at least puts the upstream packaging material fed into the ultrasonic sealing device into a tension state. Packaging machine. A paper feeding means for feeding the packaging material;
The ultrasonic sealing device according to claim 1, wherein the ultrasonic sealing device is fixedly arranged, and the relative movement of the packaging material with respect to the ultrasonic sealing device is given by the paper feeding means. Equipped packaging machine. The wrinkle suppressing means is provided on the upstream side where the packaging material is fed into the ultrasonic sealing device by the paper feeding means, and a friction resistance material that gives a brake to the movement of the packaging material, or a peripheral speed is the paper The packaging with the ultrasonic sealing device according to claim 2, wherein the wrinkle suppressing roller is rotationally controlled in a manner that is synchronized with or slower than the paper feeding speed of the packaging material by the feeding means. Machine. The wrinkle suppressing means is provided on the downstream side where the packaging material is delivered from the ultrasonic sealing device by the paper feeding means, and the peripheral speed is higher than the paper feeding speed of the packaging material by the paper feeding means. The wrapping machine provided with the ultrasonic sealing device according to claim 2, wherein the wrapping roller is a wrinkle suppressing roller that is rotationally controlled in an aspect. The wrinkle suppressing means is provided on the upstream side where the packaging material is fed into the ultrasonic sealing device by the paper feeding means, and a friction resistance material that gives a brake to the movement of the packaging material, or a peripheral speed is the paper An upstream wrinkle suppression roller that is rotated in a manner that is synchronized with or slower than the paper feeding speed of the packaging material by the feeding means, and the packaging material is removed from the ultrasonic sealing device by the paper feeding means. The downstream wrinkle suppressing roller is provided on the downstream side to be fed out and is rotationally controlled in such a manner that the peripheral speed is higher than the paper feeding speed of the packaging material by the paper feeding means. Packaging machine equipped with an ultrasonic sealing device. The packaging machine includes a former that bends the fed strip-shaped packaging material into a substantially cylindrical packaging material, and a bag making and filling device that includes a horizontal sealing unit that laterally seals the cylindrical packaging material formed from the substantially cylindrical packaging material. A packaging machine,
The paper feeding means is a feeding means for feeding at least the cylindrical packaging material in the longitudinal direction thereof,
6. The ultrasonic sealing apparatus according to claim 1, wherein the ultrasonic sealing device is applied as a vertical sealing means that seals both side edge portions of the substantially cylindrical packaging material to form the cylindrical packaging material. A packaging machine comprising the ultrasonic sealing device according to item. The ultrasonic sealing device is movable by driving means with respect to the packaging material that is stopped,
The packaging machine provided with the ultrasonic sealing device according to claim 1, wherein relative movement of the packaging material with respect to the ultrasonic sealing device is given by the driving means. The wrinkle suppressing means is provided on the upstream side where the packaging material is relatively fed to the ultrasonic sealing device by the driving means, and a friction resistance material that applies a brake to the relative movement of the packaging material, or The super-wrinkle control roller according to claim 7, wherein the roller is a wrinkle-reducing roller that is rotationally controlled in such a manner that a peripheral speed is synchronized with a relative paper feed speed of the packaging material by the driving means or slower than the paper feed speed. A packaging machine equipped with a sonic seal device. The wrinkle suppressing means is provided on the downstream side where the packaging material is relatively fed out from the ultrasonic sealing device by the driving means, and the peripheral speed is higher than the relative paper feed speed of the packaging material by the driving means. The wrapping machine provided with the ultrasonic sealing device according to claim 7, wherein the wrinkle suppressing roller is rotationally controlled in such a manner that the rotation speed is increased. The wrinkle suppressing means is provided on the upstream side where the packaging material is relatively fed to the ultrasonic sealing device by the driving means, and a friction resistance material that applies a brake to the relative movement of the packaging material, or An upstream wrinkle suppression roller whose rotation speed is controlled in a manner that the peripheral speed is synchronized with the relative paper feeding speed of the packaging material by the driving means or slower than the paper feeding speed, and the packaging material is Downstream wrinkle suppression that is provided on the downstream side that is relatively fed out from the ultrasonic sealing device and that is rotationally controlled in such a manner that the peripheral speed is faster than the relative paper feed speed of the packaging material by the driving means. The packaging machine provided with the ultrasonic sealing device according to claim 7, which is a roller. The ultrasonic sealing device is a disk-shaped ultrasonic horn having an ultrasonic sealing surface as a peripheral surface, and the anvil can sandwich a packaging material to be bonded to the ultrasonic sealing surface. A wrapping machine provided with the ultrasonic sealing device according to any one of claims 1 to 10, which is a rotary ultrasonic sealing device which is a disk-shaped anvil having a peripheral anvil surface. In the ultrasonic sealing device, the ultrasonic horn is a rod-shaped ultrasonic horn having a tip end surface as an ultrasonic sealing surface, and the anvil can sandwich a packaging material to be bonded to the ultrasonic sealing surface. A packaging machine provided with the ultrasonic sealing device according to any one of claims 1 to 10, which is a fixed ultrasonic sealing device that is a fixed anvil having an anvil end face.

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