JP6132702B2 - Film winding system - Google Patents

Description

  In the production process of a single sheet-like product such as a wrapping film for food packaging, the present invention provides the tension of the film when the film wound on a roll as an intermediate product is wound on a small roll by a predetermined amount. A system and method for improving the quality of the film as a final product by controlling the winding speed by controlling the film so that wrinkles are not generated on the wound film, and the system and method used for these. The present invention relates to a control device for controlling.

  In the production process of food wrap film, the film produced in a predetermined pre-process is wound on a roll as a single long film before it is wound on a small roll by a predetermined amount to become a final product. And stored. This roll on which a single film is wound is called an original fabric. In production of the final product, a predetermined amount of the film drawn from the original fabric is wound around a small roll via a plurality of conveying rolls, and then cut to complete the final product. By repeating this winding and cutting process on the small roll, a long film wound on the original roll is wound on a large number of small rolls by a predetermined amount. Product can be produced.

  In this way, in a system for winding a single long film from the original fabric, the peel strength of the original fabric is large and close to the core of the original fabric, that is, after a considerable amount of film has already been wound, Since the tension of the film surface at the time of winding with a roll is also large, wrinkles are likely to occur on the surface. Therefore, in order to suppress the generation of such wrinkles as much as possible, the wound film can maintain a certain quality, that is, a state without wrinkles, from the start of winding from the original fabric to the end of winding. It is necessary to set the winding speed at a high level. As a result, there is a problem that the winding speed cannot be increased more than a certain degree, and the productivity is deteriorated.

  Here, the presence or absence of such wrinkles is irrelevant to the performance of the film itself and does not affect the performance, so the system can be operated at a winding speed that can ensure the required productivity. It is. However, consumers who purchase small rolls of the final product on which the film has been wound are often sensitive to the quality of such wrinkles. It is difficult to make the speed from start to finish constant and sufficiently high.

Japanese Patent Application Laid-Open No. 09-240893 JP 2004-276146 A JP-A-10-236707

  In view of the above problems, an object of the present invention is a system in which a predetermined amount of film is continuously wound from a raw fabric to a plurality of small rolls. A system having a control device for controlling at least one parameter relating to the film tension of the film, and controlling the winding speed of the small roll based on the controlled parameter to thereby control the quality of the film wound on the small roll. It is another object of the present invention to provide a system in which the predetermined amount of film is wound while maintaining the above.

  In order to achieve the above object, the film winding system of the present invention according to claim 1 is configured such that a film (100) wound on an original fabric (10) is transferred from the original fabric to a plurality of conveying rolls (from 3). 5), a film winding system for winding a predetermined amount on a plurality of small winding rolls (7a-7f) arranged at predetermined intervals on the outer periphery of the winding roll (20), Measured by the driving mechanism (1, 2) that rotates, the measuring device (10A) that measures the amount of the original fabric wound in the original web that is rotated by the driving mechanism and the film is fed, and the measuring device. A control device (150) for controlling at least one parameter relating to the tension of the film at the time of winding the small winding roll in the winding roll based on the amount of raw roll, A control device for controlling the winding speed of the film to the small rolls (7a-7f) based on the measured parameters, and winding the predetermined amount of film on the small rolls, and the small roll And a cutter (9) for cutting the film after the predetermined amount of film is wound up.

  According to such a film winding system of the present invention, the system is wound instead of operating the system at a constant speed which is not high in productivity from the beginning to the end of winding of the original fabric as in the prior art. The film tension parameter, which may be involved in the generation of wrinkles, is controlled based on the amount of raw roll so that the film surface can be wound without wrinkles. The winding speed can be set based on the selected parameters. Therefore, the productivity of the entire system can be increased.

  The film winding system according to a second aspect of the present invention is the film winding system according to the first aspect, wherein the parameters are at least the winding speed when cutting the film with the small roll, and the winding of the film when cutting. One of the take-up torque, the turret turning speed of the take-up roll, or the draw ratio represented by the ratio of the film feed speed from the original fabric and the take-up speed of the take-up roll. .

  According to such a system, the optimum parameter for controlling the tension of the film during winding can be selected based on the material of the film. Note that the selected parameter need not be limited to one, and a plurality of more appropriate parameters can be set according to the material of the film.

  A film winding system according to a third aspect of the present invention is the film winding system according to the second aspect, wherein the parameter is a draw ratio, and the control unit is configured to perform a process between the original fabric and one of the plurality of film transport rolls. The draw ratio is controlled based on the distance.

  According to such a system, since the only parameter to be controlled is the draw ratio, the winding speed can be controlled with a simpler system. More specifically, when the film to be wound is a wrapping film for food packaging, from the material, the conveyance speed of the film unwound from the original fabric and the winding roll at the time of winding on the small roll It is preferable to control the draw ratio set between the winding speed.

  A film winding system according to a fourth aspect of the present invention is the film winding system according to the first aspect, wherein the driving mechanism has a pair of driving rolls and a belt wound between the pair of driving rolls. Rotating drive.

  According to such a system, it is possible to control the speed of the film fed out from the original fabric based on the moving speed of the belt, and therefore, the draw ratio can be controlled more easily.

  According to a sixth aspect of the present invention, there is provided a control device according to the present invention, in which an outer periphery of a take-up roll is wound on a film wound around an original fabric that is rotationally driven by a drive mechanism from the original fabric via a plurality of transport rolls. A control device used in a film winding system for winding a predetermined amount on a plurality of small rolls arranged at predetermined intervals, a first detection unit for detecting a rotational driving speed of the original fabric, and the above-mentioned in the original fabric Data relating to the tension at the time of winding the film on the small roll, the second detection section for detecting the amount of the original roll of the film, the third detection section for detecting the winding speed in the winding roll. And calculating the draw ratio based on the detection results of the first detection unit and the second detection unit, the calculated draw ratio, and the third Based on the detection result of the detection section, having an arithmetic unit for calculating a winding speed of the optimal reference data in the memory.

  According to such a control device of the present invention, it is used in a film winding system, and the system is operated at a constant speed which is not high in productivity from the beginning to the end of winding of the original fabric as in the prior art. Rather than wrapping, the film tension parameter that may be involved in the generation of wrinkles is based on the amount of the original roll so that it can be wound without wrinkling on the wound film surface. And the winding speed can be set under the controlled parameters. Therefore, the productivity of the entire system can be increased.

  Furthermore, in the film winding method of the present invention according to claim 7, the film wound on the original fabric is arranged from the original fabric on the outer periphery of the winding roll through a plurality of conveying rolls at a predetermined interval. A film winding method in which a predetermined amount is wound around a plurality of small rolls that have been formed, wherein the film is unwound during the steps of feeding the film by rotating the film and feeding the film. A step of measuring the winding amount; and determining a parameter relating to a winding speed to the small winding roll in the winding roll based on the raw roll winding amount measured in the measuring step, and based on the determined parameter A step of controlling a winding speed, a step of detecting that the predetermined amount to be wound on the small roll is wound on the small roll, and the small roll In response to the detection of the winding of a predetermined amount of the film to Lumpur, and a step of cutting the film.

  According to the film winding method of the present invention as described above, the system is wound instead of operating the system at a constant speed which is not high in productivity from the beginning to the end of winding of the original fabric as in the prior art. The film tension parameter, which may be involved in the generation of wrinkles, is controlled based on the amount of raw roll so that the film surface can be wound without wrinkles. The winding speed can be set based on the selected parameters. Therefore, the productivity of the entire system can be increased.

  According to the film winding system and method according to the present invention and the control device for controlling the system and method used therefor, the film winding is based on the measurement result of a simple and simple device for measuring the amount of raw roll. The quality as the final product of the film wound on the small roll can be improved by controlling the take-up speed. In addition, the productivity of the entire system can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the whole structure of the film winding system concerning this invention, each component in the control apparatus used with this system, and those relations. It is a graph which shows the relationship between the winding speed in the winding roll by one Example of this invention, and the amount of original fabric winding, ie, the quantity of the film in an original fabric. It is a flowchart which shows operation | movement of the film winding system by one Example of this invention. It is a figure which shows an example of the table which set the concrete parameter used for the film winding system by one Example of this invention. It is a figure which shows another example of the table which set the concrete parameter used for the film winding system by one Example of this invention.

  FIG. 1 exemplarily shows a general outline of a film winding system according to an embodiment of the present invention.

  In this system, an original fabric drive mechanism 1 having a pair of driving rolls 1a and 1b that can rotate in the directions of arrows A1 and A2 and a drive belt 2 driven by them, and this original fabric drive mechanism 1, An original fabric 10 is provided which is configured to be rotationally driven in the direction of arrow B and on which a single long film 100 wound up by a winding roll described later is wound. Then, the film 100 is fed out from the original fabric 10 that is rotationally driven by the original fabric drive mechanism 1 according to the rotation. The film 100 is transported to the touch roll 5 through a transport roll 3 and a guide roll 4 composed of a pair of roll members 3a and 3b. And it is comprised so that it may be wound up with the small roll which contacts the touch roll 5. FIG. These small rolls 7 a to 7 f are arranged at equal intervals on the outer periphery of the take-up roll 20. The take-up roll 20 is rotated in the direction of arrow C by the take-up roll drive motor 8 and rotates so that the small rolls 7 a to 7 f sequentially come into contact with the touch roll 5.

  The draw ratio when the film 100 is conveyed is determined by the respective rotation speeds of the guide roll 4 and the original fabric 10. In the present embodiment, the draw ratio is controlled by the original fabric drive mechanism 1 so that the film feed amount becomes constant regardless of the film winding amount in the original fabric. The film 100 conveyed through the guide roll 4 is wound up by a predetermined amount in a small roll configured to come into contact with the touch roll 5 by rotation of the take-up roll 20, which is 7c in the illustrated example.

  A plurality of small rolls 7a to 7f are stocked in a small roll stocker 6 provided in the vicinity of the take-up roll 20, and sequentially follow the rotation of the take-up roll 20 at a position 7a at a predetermined interval on the outer periphery thereof. In this embodiment, they are arranged at intervals of 60 degrees. When a predetermined amount of film is wound on the small roll that is in contact with the touch roll 5, the small roll is also moved in response to the rotation of the take-up roll 20, and the cutter 9 is moved to the position 7d. Move in the direction of arrow X to cut the film. And it removes from the winding roll 20 in the position from 7d to 7f. By repeating such an operation, a predetermined amount of film supplied from the raw fabric 10 is sequentially wound on each small roll to obtain a final product.

  In the vicinity of the original fabric 10, a measuring device 10A for measuring the original fabric winding amount is provided. Thereby, the amount of the film 100 wound around the original fabric is measured, and the value is sent to the control device 150. The control device 150 is provided with each block for controlling the system according to the present invention. Then, it is detected by the original fabric winding amount detection unit 150B inside the control device 150, and after processing such as conversion into a form suitable for calculation by the calculation unit 150D, it is sent to the calculation unit 150D. Based on the calculation result in the calculation unit 150D, a parameter relating to the tension of the film when the film 100 is wound by the small winding roll 7 by the rotation of the winding roll 20 is set, and the winding speed of the film 100 is determined based on the parameter. Be controlled. Various values can be used as the value of the measured amount of raw roll. For example, by measuring the thickness of the wound film in the original fabric 10 and the weight of the original fabric 10, it is possible to calculate the amount of the film being wound from these values. is there. Further, as will be described later, it is also possible to adopt a configuration in which a set of parameters for setting a winding speed corresponding to the original roll winding amount is stored in advance in the memory 150E in the form of a table.

  As shown in the figure, the control device 150 is provided with other blocks used for film winding control according to the present invention.

  The belt drive speed detection unit 150 </ b> A in the control device 150 detects the speed of the belt 2 provided in the raw fabric drive mechanism 1. Thus, the feeding speed of the film 100 from the original fabric 10 is detected, and the calculation unit 150D performs the calculation together with the speed detected by the winding speed detection unit 150C to determine the draw ratio.

  In the original fabric winding amount detection unit 150B, the original fabric winding amount measured by the measuring apparatus 10A is detected. This amount of raw roll is used when determining the winding speed of the film 100 on the winding roll 20 together with the set parameters such as the draw ratio. The guide roll 4 and the touch roll 5 are controlled so that winding is performed based on this speed.

  The memory 150E provided in the control device 150 is also used for saving a calculation value that is appropriately required in the calculation process in the calculation unit 150D.

  FIG. 2 shows the amount of raw roll wound and the film transport speed when the film is actually wound by the film winding system of FIG. 1, especially the winding speed on the winding roll and the film cutting. It is a graph which shows the relationship with the winding-up speed of.

  The horizontal axis represents the amount of raw roll. In this case, it is shown that the film is gradually wound from the state of the thickness L6, and finally all the films are wound up from L5 to L1, and the state is shifted from T1 to T6.

  The vertical axis represents the conveyance speed v1 to v8 of the film 100. Among these, V1 represents the film winding speed on the winding roll 20, and V2 represents the winding speed when the film is cut when a predetermined amount of film is wound on the small roll 7. In general, the smaller the amount of original roll wound, that is, the smaller the remaining amount of the film being wound, the greater the peel strength of the film in the original fabric, and a greater force is required for winding. Since wrinkles are likely to occur in the wound film, the winding speed becomes smaller as the amount of the film fed from the original becomes larger as shown in the figure. Therefore, the winding speed decreases as the feeding progresses, and the winding takes time. It is desirable to minimize the reduction in the winding speed due to the progress of the feeding. Ideally, as indicated by the broken line, it is desirable to shift from the start to the end of winding at a constant speed. In the example of FIG. 2, the winding progresses from the state where L6 has the largest amount of original fabric winding, and a constant winding speed is maintained until the amount of original fabric winding L3 reaches about half. In accordance with this, the speed when cutting the film also maintains a constant value. That is, in the region of T1, the state of the parameter for determining the winding speed is constant. Since the section of T1 can be said to be an area where the winding operation is performed relatively stably, only one parameter, for example, a draw ratio is used without using many parameters for speed control. Is possible. In addition, in this FIG. 2, although the conveyance speed is decreasing linearly with the decrease in the amount of original roll, FIG. 2 is an example for explanation, and actually in each section depending on the material of the film and the like. It is possible that the decreasing trend fluctuates between.

  FIG. 3 is a flowchart showing an example of the operation of the film winding system of FIG. As shown in this flowchart, in step S1, winding of the film 100 at the position of the winding roll 20 from the original fabric 10 is started. Thereafter, the winding speed is controlled while this winding is performed, that is, until the end of the winding amount is detected in step S6. Therefore, it is not necessary to stop the operation of the system for setting parameters necessary for control, and seamless operation control is possible.

  In step S2, the amount of raw roll is measured by the measuring device 10A. The winding speed of the film 100 on the winding roll 20 is controlled based on the measured original roll winding amount. As described above, various values can be used for measuring the amount of the original fabric wound as long as it indicates the amount of the film wound and wound on the original fabric. For example, the thickness of the film 100 from the center of the original fabric, the weight of the film, and the like can be used.

  In step S3, a parameter for speed control is determined based on the measured amount of raw roll, and thereby the winding speed is controlled. As parameters used in this case, various values relating to film conveyance and winding can be used. For example, the winding speed when cutting the film with a small roll, the winding torque of the film when cutting, the turret rotation speed of the winding roll, and the film feeding speed from the original fabric and the winding roll A draw ratio represented by a winding speed ratio can be considered. For controlling the winding speed, only one of these parameters may be used, or a plurality of parameters are combined to control the speed so that the combination and the winding speed correspond. Anyway.

  The draw ratio is determined by the moving speed of the driving belt 2 of the original fabric 10 and the rotational speed of the guide roll 4. The rotation speed of the guide roll 4 needs to be constant when controlling the winding speed of the small roll that is in contact with the touch roll 5. Therefore, the draw ratio is determined mainly only by the moving speed of the drive belt 2.

  The draw ratio can also be controlled based on the distance between the original fabric 10 and the guide roll 4. The specific contents of the control in the case where the control is performed by determining the draw ratio using the distance between the rolls will be described.

  When the amount of the original fabric is reduced, the distance between the original fabric 10 and the guide roll 4 is increased. That is, the position of the guide roll 4 in the system is fixed, but the film feed position from the original fabric 10 moves away from the guide roll 4 as the film is wound. Then, as the feeding progresses and the amount of the original fabric is reduced, the original fabric is tightened. As described above, the peel strength is increased, and the tension applied to the film is also increased. Both the increase in the distance between the guide roll 4 and the original fabric 10 and the increase in the tension cause wrinkles on the surface when a thin film such as a food packaging wrap film is wound. easy. Therefore, it is possible to reduce the draw ratio and increase the winding speed as compared with when the amount of raw roll is large, thereby increasing the winding speed.

  The control of this parameter is configured to be performed according to the amount of raw roll. In step S4, it is detected that an amount of film to be wound on the small roll is wound, and in step S5, the film is cut, and a final product in which a predetermined amount of film is wound on the small roll is completed. To do. More specifically, the parameter can be controlled immediately after the measurement of the amount of raw roll, but depending on the film material and other conditions, it is performed after a lapse of a certain time after the measurement, and further, a predetermined amount. The film may be cut after detecting the winding of the film. Also, in this parameter control, it is possible to set a plurality of timings and change the winding speed by performing parameter control separately from the detection of a predetermined amount of winding. This is effective when, for example, the film material is prone to wrinkling, and it is desirable to perform speed control a plurality of times separately from the cutting timing. In this case, when the parameter is controlled in S3 of FIG. 3, a fixed time is measured by a timer, and when that time has elapsed, the process proceeds to S2 and the original roll winding amount is set regardless of the step of S4. It only has to be measured.

  In step S6, it is detected whether or not all of the amount to be wound out of the amount of raw roll is wound into a small roll to become a final product, and when the winding is finished, the whole process is finished. Become. If the winding has not been completed for the entire winding amount, the process returns to S2, and the process is continued after measuring the original winding amount again.

  By adopting such a flow configuration, the film 100 wound on the small roll is controlled so as not to be wrinkled without interrupting the winding operation of the film 100, and the optimum based on the tension of the film. The film can be wound at the winding speed.

  Here, FIG. 4 is a table showing an example of parameter combinations when controlling the winding speed of the film wound on the small roll. When determining the winding speed of the winding roll 20 in each section T1 to T6 in FIG. 2, such a combination of parameters is stored in the memory 150E in advance, and is read out so as to be optimal for the section. The film can be wound at a high winding speed. In this example, the cutting speed is Vc1, the cutting torque is TQ1, the turret turning ratio is Vt1, and the draw ratio is a in the section T1. In other words, by determining in advance the relationship between the amount of raw roll and the parameter, it is possible to determine the winding speed and cutting speed only by measuring the quality of the raw roll without performing complicated calculations. it can. Therefore, the winding speed can be quickly controlled without stopping the winding operation. It should be noted that the value of each parameter can be configured not only to increase or decrease according to the decrease in the amount of original roll, but also to be an optimal value depending on the film material, speed control pattern, and the like.

  Further, when determining the winding speed using this table, it is not necessary to use a combination using all parameters in all sections as shown in FIG. For example, in the table as shown in FIG. 5, the draw ratio a is the only parameter used to determine the winding speed in the T1 section where the film is not strongly peeled and is considered to be stably wound. . Thereafter, the number of parameters to be used can be increased as necessary. In the example of FIG. 5, in the section of T4 where the fluctuation of the winding speed is considered to be the largest, the film tension is controlled more accurately than in the section of T1 using all parameters including the turret rotation speed. Thus, the take-up speed is determined. In this example, the draw ratio is configured to be used as a parameter in all sections.

  The configuration of the present invention has been specifically described. However, this is merely an illustrative example of the present invention, and any person having ordinary knowledge in the technical field to which the present invention belongs will be essential to the present invention. Various modifications are possible without departing from the characteristics.

  Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to illustrate them, and the spirit and scope of the present invention are not limited by such embodiments. Absent. The scope of the present invention should be construed according to the following claims, and all technologies within the scope equivalent thereto should be construed as being included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Drive mechanism, 2 Drive belt, 3 Roll for conveyance, 4 Guide roll, 5 Touch roll, 6 Small roll stocker, 7a-7f Small roll, 8 Winding roll drive motor, 9 Cutter, 10 Original fabric, 20 winding Take-up roll, 150 control device, 150A belt driving speed detection unit, 150B raw roll winding amount detection unit, 150C winding speed detection unit, 150D calculation unit, 150E memory

Claims (8)

Film take-up of a film wound on an original fabric from the original fabric on a plurality of small rolls arranged at predetermined intervals on the outer periphery of the take-up roll via a plurality of transport rolls A system,
A driving mechanism that rotationally drives the original fabric; and a measurement device that measures the amount of the original fabric wound in the original fabric that is rotated by the drive mechanism and the film is unwound.
A control device for controlling at least one parameter relating to a film tension at the time of winding on a small winding roll in the winding roll based on the amount of raw roll wound by the measuring device, A control device for controlling the winding speed of the film to the small roll based on the parameters, and winding the predetermined amount of film on the small roll;
A cutter for cutting the film after the predetermined amount of film has been wound on the small roll;
I have a,
The parameter is at least the winding speed when cutting the film with the small roll, the winding torque of the film when cutting, the turret rotation speed of the winding roll, or the film from the original fabric A draw ratio represented by a ratio of the unwinding speed and the winding speed of the winding roll ,
Film winding system. The parameter is a draw ratio, and the control device controls the draw ratio based on a distance between the original fabric and one of the plurality of film transport rolls, and the draw ratio, by a raw winding amount, and it controls the winding speed, film winding system according to claim 1.   The film winding system according to claim 1, wherein the driving mechanism includes a pair of driving rolls and a belt wound between them, and the belt is driven to rotate by the belt.   The film winding system according to claim 1, wherein the film is a food packaging wrap film. A film wound on an original fabric that is rotationally driven by a drive mechanism is transferred from the original fabric to a plurality of small rolls arranged at predetermined intervals on the outer periphery of the take-up roll via a plurality of transport rolls. A control device used in a film winding system for winding a predetermined amount,
A first detector for detecting the rotational driving speed of the original fabric;
A second detection unit for detecting an amount of the original film wound on the original film;
A third detection unit for detecting a winding speed in the winding roll;
Data relating to the tension at the time of winding the film on the small roll, and storing at least data relating to the draw ratio;
The draw ratio is calculated based on the detection results of the first detection unit and the second detection unit, and the memory data is referred to based on the calculated draw ratio and the detection result of the third detection unit. A calculation unit that calculates the optimum winding speed,
A control device. Film winding that winds a predetermined amount of the film wound on the original fabric from the original fabric to a plurality of small winding rolls arranged at predetermined intervals on the outer periphery of the winding roll via a plurality of conveying rolls A method of taking,
A step of feeding the film by rotationally driving the original fabric;
During the step of unwinding the film, measuring the amount of the original fabric wound;
Determining a parameter relating to the winding speed of the winding roll to the small winding roll based on the original roll winding amount measured in the measuring step, and controlling the winding speed based on the determined parameter; ,
Detecting that the predetermined amount to be wound on the small roll is wound on the small roll;
In response to detecting the winding of a predetermined amount of film onto the small roll, cutting the film;
I have a,
The parameter is at least the winding speed when cutting the film with the small roll, the winding torque of the film when cutting, the turret rotation speed of the winding roll, or the film from the original fabric A draw ratio represented by a ratio of the unwinding speed and the winding speed of the winding roll ,
Film winding method. 7. The film according to claim 6 , wherein a parameter determined when controlling the winding speed is determined by a draw ratio determined by a distance between the original fabric and a predetermined one of the plurality of transport rolls. Winding method. The film winding method according to claim 7 , further comprising a step of detecting a predetermined time interval for performing parameter control after the step of measuring the amount of the original fabric wound.