JP6037429B2 - Horizontal sealing device and automatic filling and packaging machine having the same - Google Patents

Description

  The present invention relates to a lateral seal device and an automatic filling and packaging machine including the lateral seal device, and more particularly, for packaging by a heat seal bar which cooperates with each other of a pair of lateral seal rollers extending in parallel with each other. A lateral seal device capable of easily and quickly changing the width dimension of the lateral seal portion formed on the film according to the dimensions of the packaging bag, the amount of the package to be packed, and the like, and the same An automatic filling and packaging machine is proposed.

  In recent years, it has been widely used to automatically fill and package liquids such as foods and drinks, seasonings, pharmaceuticals, and cosmetics, viscous materials or powders, granular materials, and other objects to be packaged with soft packaging films. .

  In such automatic filling and packaging of a package, for example, a laminated structure of a biaxially stretched base film layer and an unstretched sealant layer is used, or a base film layer is coated with a heat-sensitive adhesive layer. A soft packaging film having a layer structure can be used, and in a general automatic filling and packaging machine used for such automatic filling and packaging, each of the pair of transverse seal rollers is provided with a gear mechanism by one rotational driving means. In this case, the width dimension of the horizontal seal portion is specified by the circumferential width of the heat seal bar provided on the horizontal seal roller. Will be.

  For this reason, when using a horizontal seal roller having a heat seal bar that is detachable from the rotating roller as disclosed in Patent Document 1, the change in the width dimension of the horizontal seal portion is: This can be done by replacing the heat seal bar with one having the required width dimension.

JP 2000-185715 A

  However, in the prior art described in Patent Document 1, each time the width dimension of the horizontal seal portion is changed, the heat seal bar is attached to and detached from the rotating roller, or the heat seal bar is attached to and detached from the rotating roller. In addition to the problem of work man-hours required, there are problems such as equipment cost and management cost that it is necessary to prepare and store many types of heat seal bars with different width dimensions in advance, In addition, there is a problem in work time that it is necessary to wait for the existing heat seal bar to be sufficiently cooled when the heat seal bar is exchanged.

  The object of the present invention is to solve such problems of the prior art, and the object of the invention is to increase the work man-hours and work time required for changing the width dimension of the horizontal seal portion. To provide a horizontal sealing device and an automatic filling and packaging machine including the horizontal sealing device that can sufficiently and easily change the width dimension by sufficiently suppressing an increase in equipment cost and management cost. is there.

The lateral sealing device of the present invention is provided with a packaging film on one or two long packaging films that are fed out in the longitudinal direction and arranged in a posture opposite to a heat-sensitive part coat adhesive layer or a sealant layer. One or more heat seal bars extending in a direction orthogonal to the longitudinal direction of the film, and a pair of horizontal seal rollers arranged in parallel with each other, for example, in a horizontal posture, in the longitudinal direction of the packaging film Each of the transverse seal rollers that are rotationally driven at equal circumferential speeds in opposite directions, and preferably have a pair of the same diameter. coupled to the drive means, the rotation angle position of one of the lateral sealing rollers relative to the other of the lateral seal rollers, is advanced relatively over a required angular range, or by delaying, opposite Those formed by providing a control means for changing the matching width Toshiruba.

  Here, preferably, at least one of the lateral seal rollers is close to the other lateral seal roller under the action of, for example, a universal joint, Schmitt coupling (registered trademark), etc. Provided to be displaceable.

  Preferably, each driving means is constituted by a servo motor or a stepping motor in order to maintain an angle change amount of one horizontal seal roller with respect to the other horizontal seal roller with high accuracy.

The automatic filling and packaging machine according to the present invention is intermittently or continuously fed in the longitudinal direction, and is used for one or two long packaging films under the facing posture of the part coat adhesive layer or the sealant layer. In the side edge portion, a vertical seal portion is formed which is continuous in the longitudinal direction of the packaging film, and includes a vertical seal means for forming a soft packaging film in a cylindrical shape, and a cylindrical shape in which the vertical seal portion is formed. A lateral seal portion that extends over the entire width of the packaging film in a direction perpendicular to the longitudinal direction of the packaging film, which seals the packaged article intermittently or continuously filled in the packaging film in the packaging film Is provided with lateral sealing means formed at intervals in the longitudinal direction of the packaging film, and the lateral sealing means is constituted by any of the lateral sealing devices described above. It become one.

In the lateral seal device of the present invention, each of the pair of lateral seal rollers is connected to the respective drive means that can be controlled independently of each other, and one drive is performed based on a command input to the control means. Means relative to the other drive means to cause the rotational angular position of one lateral seal roller to advance or retard relative to the other lateral seal roller over the required angular range, resulting in each It is provided in the transverse sealing rollers one or more by increasing or decreasing the clamping width of the wrapping film by opposing heat seal bars cooperating with each other, good Maples lever, in the heat seal bars facing each other, for packaging By reducing or increasing the width of the portion that does not contribute to the pinching of the film, that is, the formation of the horizontal seal portion, the horizontal seal is not changed. It is possible to change the width of the pole tip to easily and quickly to those expected by the street.

  Thus, in this horizontal sealing device, it is not necessary to prepare a large number of types of heat seal bars according to the width dimension of the horizontal seal portion in advance, maintenance management, etc., and the number of work steps for replacing the heat seal bar , The waiting time until the heat seal bar is cooled is unnecessary, and the formation work of the horizontal seal part is performed inexpensively and efficiently regardless of the number of changes in the width dimension of the horizontal seal part. Can do. In addition, in this horizontal sealing device, since there are two driving means for separately driving the pair of horizontal sealing rollers, the feeding torque can be doubled as compared with the conventional packaging film. The object to be packaged can be reliably extruded from the formation portion with a heat seal bar, and the lateral seal portion can be formed more safely.

  In such a lateral seal device, at least one lateral seal roller connected to each mutually independent drive means is maintained in a horizontal plane while maintaining the connection to each drive means with respect to the other lateral seal roller. When it is configured so that it can be displaced in the proximity and at a distance, it can form a lateral seal portion as expected on the packaging film under the proximity displacement of both lateral seal rollers. In addition to cleaning and maintenance of the horizontal seal roller, initial film passing operation and the like can be made sufficiently easy.

  In addition, when each drive means is constituted by a servo motor or a stepping motor, for example, based on feedback control from a built-in encoder or the like, the amount of angular change between the paired lateral seal rollers is maintained with high accuracy. However, both lateral seal rollers can be driven to rotate synchronously.

  In the automatic filling and packaging machine of the present invention, the width and width of the horizontal seal portion can be easily and quickly changed to the expected one by fully exhibiting the functions and effects described above for the horizontal seal device. .

It is a schematic diagram which shows one Embodiment of the automatic filling packaging machine of this invention. It is an approximate line perspective view showing one embodiment of a transverse seal device of this invention. It is a flowchart which shows an example of control by a control means. It is a rough line side view which shows the reference | standard origin position of the horizontal seal roller which makes a pair, and the roller attitude | position after the angle change of one horizontal seal roller by making a principal part into a cross section.

An embodiment of the present invention will be described below based on the drawings.
The automatic filling and packaging machine of the embodiment shown in FIG. 1 that includes the horizontal sealing device of one embodiment of the present invention is a vertical packaging machine.

  The automatic filling and packaging machine shown in FIG. 1 has, for example, a laminated structure of a biaxially stretched base film layer and an unstretched sealant layer, or a single layer structure in which a base film layer is part-coated with a heat-sensitive adhesive layer. Wrapping a single soft, long packaging film so that the sealant layer or part coat adhesive layer of the packaging film is in an opposing posture while continuously running in the longitudinal direction of the film. The film for the packaging is formed into a cylindrical shape by folding back the film for width in the width direction, superimposing both side edges of the film, and fusing the side edges of the packaging film continuously in the form of a palm. The required packaging material such as liquid, viscous, powder, granular, etc., is preferably packed continuously and automatically packed in a required amount, and the illustrated packaging machine includes a film folding unit 1 and Vertical seal hand 2, the packaged article supply unit 3, the horizontal seal device 4 according to the present invention, and a continuous belt-shaped continuous package that is filled and packaged with the packaged article is cut at a required horizontal seal part position. For example, the rotary cutting means 5 is a main component.

  By the way, in the illustrated film folding section 1, a single long packaging film 6 that is continuously fed out from the winding roll R of the soft packaging film 6 is used as a plurality of guide rollers. The film 6 for packaging is guided by a guide member 7 having a V-shaped plane formation and a front surface having a bowl-like shape while traveling from the upper side to the lower side. Alternatively, the part coat adhesive layers are folded back in the width direction so as to face each other, and in the figure, the side edges located at the left end of the packaging film 6 are aligned and overlapped.

  Further, in the vertical sealing means 2, the side edge portions of the packaging film 6 are sandwiched by the flange-shaped seal bars 8a of a pair of vertical sealing rollers 8 that are paired in the front-rear direction in the figure, and are continuously heated and pressurized. Then, under the rotation of the vertical sealing roller 8, the vertical sealing portion 6a continuous in the longitudinal direction of the packaging film 6 is formed, and the packaging film 6 is formed in a cylindrical shape.

  Here, the vertical sealing means 2 is a pair of vertical sealing rollers 8 that extend in parallel in the front-rear direction of the drawing in the horizontal plane and have the same diameter (only the front side roller located on the front side is shown in the drawing). And a pair of vertical seal rollers 8 that are rotated in the opposite directions at a constant speed, for example, one drive motor 9 made of a servo motor and a gear mechanism (not shown), and one (front side) vertical seal roller 8. A pair of cylinders 10, for example, air cylinders, are provided that press the bearing block that supports both ends of the bearing block toward the bearing block that supports the other (other side) vertical seal roller 8.

  Each of such a pair of vertical seal rollers 8 has one circular flange-shaped seal bar 8a on the outer peripheral surface and has a built-in heater contributing to heating of the seal bar 8a. By pressing the front vertical seal roller 8 toward the rear vertical seal roller 8 with the cylinder 10, the pair of vertical seal rollers 8 seals the overlapping side edges of the packaging film 6. While being sandwiched between the bars 8a, heating and pressurization are performed, and the sealant layer or part coat adhesive layer on the side edge portion is fused in the form of a palm to form the vertical seal portion 6a, and based on the rotation of the vertical seal roller 8 Then, the packaging film 6 is fed out and run downward in the figure.

  Further, the packaged article supply unit 3 is formed in a cylindrical shape from a tank (not shown) through a pump and a supply path, and through a filling nozzle 11 that extends between the pair of vertical seal rollers 8 and extends in the vertical direction. An object to be packaged M is continuously or intermittently filled inside the packaging film 6.

  Further, the lateral seal device 4 described in detail later includes one or more pairs of lateral seal rollers 12 provided in the same horizontal plane so as to extend parallel to the front-rear direction of the drawing and extending in the roller axial direction. Each of the heat sealing bars 12a is formed in a cylindrical shape and filled with an article to be packaged, and the transverse width over the entire width of the packaging film 6 extends in a direction perpendicular to the longitudinal direction of the packaging film 6. The sealing part 6b is provided at a predetermined interval in the longitudinal direction of the packaging film 6 to form a packaging body W that is continuous in the longitudinal direction of the packaging film 6 and is filled and packaged with an article to be packaged.

  In the rotary cutting means 5, the packaging bodies W that are continuous in the vertical direction are cut and separated by the straight cutting blade 5a at the intermediate position of the seal width of the horizontal seal portion 6b for each required number.

  By the way, as illustrated in FIG. 2, the lateral seal device 4 is linearly formed in the roller axial direction on each of a pair of front and rear parallel seal rollers 12, preferably having the same diameter, each including a heater (not shown). One or more, four heat seal bars 12a extending in the drawing, are preferably provided so as to be detachable, and both end portions of the respective transverse seal rollers 12 are brought close to each other under the guidance of the guide rod 13 and Each bearing block 14 provided so as to be slidable and displaceable in the separation direction is rotatably supported, and one end of each transverse seal roller 12 is moved toward and away from the pair of transverse seal rollers 12. It is connected to each driving means 16, for example, a servo motor, via a permissible displacement absorbing means 15, for example, Schmitt coupling (registered trademark) to form a pair Each of the horizontal sealing rollers 12 can be driven to rotate in opposite directions at the same peripheral speed. For example, each bearing block 14 of one horizontal sealing roller 12 on the front side is connected to the other side on the rear side. Cylinders 17 are provided to press the pair of bearing blocks 14 of the seal roller 12 toward each other. Further, based on an input command, the rotational angle position of one horizontal seal roller 12 is set with respect to the other horizontal seal roller 12. Control means 18 for outputting an instruction to relatively advance or delay over a predetermined angle range to the drive means 16 can be configured by connecting each of the drive means 16 with a signal.

  Here, each of the pair of transverse seal rollers 12 is provided with a circular flange that is disposed at each end portion of each roller 12 and restricts the adjacent displacement of the transverse seal rollers 12 under the contact of the circumferential surface. 12b can be provided, and under the contact of the circular flange 12b, the cylinder 17 secures a required contact force between the peripheral surfaces of the flanges so that the heat sealing bar 12a is attached to the packaging film 6. Thus, an appropriate lateral seal portion 6b as expected can be formed.

  In addition, here, each of the bearing blocks 14 on one shaft end side of the pair of horizontal seal rollers 12 is fixed to the respective front and rear fixed blocks 19, for example, a pair of upper and lower parallel lines extending linearly in the horizontal direction. By providing the guide rod 13 so as to penetrate each bearing block 14, the guide rod 13 can be slid and displaced sufficiently smoothly in each of the approach direction and the separation direction. The same applies to the bearing block 14.

  Here, when a Schmitt coupling is used as the displacement absorbing means 15, the horizontal length of the horizontal seal roller 12 can be smoothly allowed by suppressing the axial length between the drive means 16 and the horizontal seal roller 12 to be short. In addition, when a servo motor is used as the driving means 16, the rotational phase difference of one horizontal seal roller 12 with respect to the other horizontal seal roller 12 can be maintained with high accuracy.

  By the way, the control means 18 has, for example, a controller having a normal microcomputer and a motor driver having a motor drive circuit for each horizontal seal roller, and is incorporated in a servo motor as the drive means 16, for example. For example, under the feedback of the absolute rotation angle data of the servo motor from the absolute encoder, as shown in the flowchart in FIG. 3, following the power ON in step S1, the filling condition setting in step S2, ie, line speed Based on the input of the product pitch, vertical / horizontal seal width setting, film tension, film pressing force setting, package filling amount setting, vertical / horizontal seal roller temperature setting, etc., in step S3, the pair of horizontal seal rollers 12 is paired. Each of the mutually opposing heat seal bars 12a is illustrated in FIG. 4 (a). To confronting aligned across the width to so that initializes to confirm the reference origin.

  Next, in step S4, one of the paired horizontal seal rollers 12, for example, the servo motor for the horizontal seal roller 12 located on the near side is operated, and the horizontal seal roller 12 located on the near side is activated. In accordance with a required increase / decrease amount of the width of the horizontal seal portion, an angle is displaced to the advance side or the delay side in the circumferential direction of the horizontal seal roller 12 by the difference from the actual facing posture of each heat seal bar. As illustrated in (b), the alignment width of each opposing heat seal bar 12a is changed.

  As a result, the matching width of the opposing heat seal bars 12a is as shown in FIG. 4 (b), and the individual heat seal bars are compared to the maximum alignment width of the heat seal bars 12a shown in FIG. 4 (a). For example, if the width is reduced by 2.5 mm on one side at 12a, the width of the lateral seal portion 6b is formed to be 5 mm narrower than that shown in FIG.

  Thereafter, in step S5, the pair of horizontal sealing rollers 12 are heated from the palm position shown in FIG. 4 (b) where the respective heat seal bars 12a face each other as described above. The seal bars 12a are moved away from each other by the same rotation angle to the start position where the seal bar 12a is moved to the open position where the packaging film 6 can be easily passed between them. The pressing force is temporarily released so that the gap between the pair of transverse seal rollers 12 can be widened to facilitate the film passing of the packaging film 6 between them. In step S6, initialization of the automatic filling and packaging machine is completed.

  In the next step S7, for example, based on a signal from an operation start switch operated by an operator, the automatic filling and packaging machine is continuously operated under the filling conditions set in the previous step S2, and subsequent steps S8 to S10 are performed. Thus, the control of rotating the servo motors for the pair of horizontal seal rollers 12 in synchronism with each other at the same speed is performed on the servo motors for the horizontal seal rollers 12. Specifically, in these steps S8 to S10, the controller sends an angular position command with an angular difference corresponding to the alignment width of the heat seal bar 12a of the two horizontal seal rollers 12 in step S8. In step S9, the motor driver checks the current angular position with an absolute encoder, and in step S10 drives the servo motor so that the angular position approaches the angular position command. When the current angular position confirmed by the absolute encoder approaches the angular position command to a predetermined angle, the controller repeats the process of issuing the next angular position command to the motor driver in step S8.

  Therefore, in the horizontal seal device 4 of the above-described embodiment and the automatic filling and packaging machine using the same, the width dimension of the horizontal seal portion 6b according to the dimensions of the package W, the filling and packaging amount of the article to be packaged M, etc. On the premise that each horizontal sealing roller 12 is connected to each driving means 16, under the action of the control means 18, the rotational angle position of one of the paired horizontal sealing rollers 12 is changed to the other horizontal sealing roller 12. On the other hand, the width dimension can be easily and quickly changed to the desired one just by selecting by advancing or delaying over the required angular range.

  As a result, it is not necessary to prepare and manage many kinds of heat seal bars 12a having different width dimensions in advance, and it is possible to reduce the work man-hours and work time for replacing the heat seal bars 12a. The work efficiency can be greatly improved as unnecessary. Moreover, in this lateral sealing device 4, since there are two driving means 16 for separately driving the paired lateral sealing rollers 12, the feeding torque can be doubled with respect to the packaging film 6, so that the packaging film can be applied. Thus, it is possible to reliably extrude the article M from the horizontal seal portion forming portion 6 with the heat seal bar 12a, and to form the horizontal seal portion 6b more safely.

  Although the case where the horizontal sealing device of the present invention is used in a vertical automatic filling and packaging machine has been described above, when the sealing device is used in a horizontal packaging machine, the sealing device can be applied as a side seal device. Similarly, even in this application, the rotational angle position of one of the pair of front and rear control seal rollers is relative to the other side seal roller over the required angular range under the action of the control means. The seal width of the side seal portion can be adjusted in a simple and quick manner as needed by changing the alignment width of the heat seal bar to advance or delay. Further, a stepping motor can be used for at least one of the drive motor 9 and the drive means 16 instead of the servo motor.

  Thus, according to the horizontal sealing device and the automatic filling and packaging machine of the present invention, it is unnecessary to prepare a large number of types of heat seal bars corresponding to the width dimension of the horizontal seal portion in advance, to perform maintenance management, etc. The work man-hours for exchanging the bar, the waiting time until the heat seal bar is cooled, etc. are unnecessary, and the formation work of the horizontal seal part is performed regardless of the number of changes in the width dimension of the horizontal seal part. It can be performed inexpensively and efficiently. In addition, in this horizontal sealing device, since there are two driving means for separately driving the pair of horizontal sealing rollers, the feeding torque can be doubled as compared with the conventional packaging film. The object to be packaged can be reliably extruded from the formation portion with a heat seal bar, and the lateral seal portion can be formed more safely.

DESCRIPTION OF SYMBOLS 1 Film folding | returning part 2 Vertical seal | sticker part 3 Package supply part 4 Horizontal seal device 5 Rotating cutting means 6 Film for packaging 6a Vertical seal part 6b Horizontal seal part 7 Guide member 8 Vertical seal roller 8a Flange-shaped seal bar 9 Drive motor 10 , 17 Cylinder 11 Filling nozzle 12 Horizontal seal roller 12a Heat seal bar 12b Circular flange 13 Guide rod 14 Bearing block 15 Displacement absorbing means 16 Drive means 18 Control means 19 Fixed block R Winding roll M Package W W package

Claims (4)

One or more heat seal bars that extend in the longitudinal direction and extend in a direction perpendicular to the longitudinal direction of the packaging film on a long packaging film that is disposed in a posture opposite to the adhesive layer or the sealant layer A horizontal seal device that forms a horizontal seal portion spaced apart in the longitudinal direction of the packaging film with a pair of horizontal seal rollers disposed in parallel to each other,
Each of the pair of transverse seal rollers that are rotationally driven in directions opposite to each other is connected to each drive means independent of each other,
There is provided a control means for changing the alignment width of the opposing heat seal bars by advancing or delaying the rotational angle position of one horizontal seal roller relative to the other horizontal seal roller over a required angle range. Horizontal seal device.   The horizontal sealing device according to claim 1, wherein at least one of the horizontal sealing rollers is provided so as to be displaceable in proximity to and away from the other horizontal sealing roller.   The horizontal sealing device according to claim 1 or 2, wherein each driving means is a servo motor or a stepping motor. It runs intermittently or continuously in the longitudinal direction, and continues in the longitudinal direction of the packaging film on the side edge of one or two long packaging films under the facing posture of the adhesive layer or sealant layer a longitudinal sealing portion is formed, comprising a longitudinal sealing means for forming a packaging film into a tubular shape Rutotomoni,
The packaging film is sealed in the packaging film intermittently or continuously filled into the cylindrical packaging film in which the vertical seal portion is formed. The packaging film is perpendicular to the longitudinal direction of the packaging film. An automatic filling and packaging machine comprising a transverse sealing means for forming a transverse seal portion extending over the entire width of the packaging film at intervals in the longitudinal direction of the packaging film,
An automatic filling and packaging machine in which the horizontal sealing means is the horizontal sealing device according to any one of claims 1 to 3.

Images