JP7441689B2 - Method of manufacturing packaging roll body - Google Patents

Description

The present invention relates to a method for manufacturing a packaging roll body in which a packaging band is wound around a core.

A packaging roll for food packaging is used to preserve and dry food and to prevent the adhesion of foreign substances.As shown in FIG. A transparent wrap film 5 is wound in multiple layers by a rewinder (winding machine), and a slip strip 6 is inserted into the visible attachment area of the outermost layer to make it easier to grasp the free end of the outermost layer. The products are then inspected for the presence or absence of the pick-up paper 6, wrinkles 7, roll shape, etc. to judge whether they are good or bad, and then the non-defective products are inserted into a special packaging box (see Patent Document 1).

Although not shown, the rewinder includes a drum roll that is in sliding contact with the paper tube 3, and a pair of left and right drive mechanisms that press both ends of the paper tube 3 that are in sliding contact with the drum roll in the direction of the drum roll using a helper belt. The paper tube 3 is rotated by circulating the helper belts of the drive mechanisms, and the wrap film 5 from the original fabric 4 is re-wound around the rotating paper tube 3 to manufacture the packaging roll body 1. The helper belts of the pair of drive mechanisms are required to press both ends of the paper tube 3 with the same pressing force in the direction of the drum roll in order to prevent the occurrence of wrinkles 7 when the wrap film 5 is re-wound.

Japanese Patent Application Publication No. 2018-193159

Conventional rewinders are constructed as described above, and are required to press both ends of the paper tube 3 in the drum roll direction with an equal pressing force by a pair of helper belts, but due to wear and deterioration of the helper belts, etc. If there is a difference in the pressing force between the pair of helper belts, twisting occurs in the paper tube 3, and as a result of this twisting, wrinkles 7 extending in the width direction and the circumferential direction of the wrap film 5 become complicated. (See Figure 5). Since the wrap film 5 is wound in multiple layers, the wrinkles 7 on the wrap film 5 cannot be corrected and removed due to the tightening over time, and as a result, the appearance and appearance have been greatly deteriorated. Defective packaging roll bodies 1 will be continuously manufactured.

As a means to eliminate this defective packaging roll body 1, (1) a method of checking the tension of each helper belt during maintenance of the rewinder, (2) a winding state of the packaging roll body 1 after the wrap film 5 has been rewound. Specifically, methods have been proposed for inspecting the degree of wrinkles 7 and the winding hardness. However, in the case of methods (1) and (2), although it is possible to detect the wrinkles 7 of the wrap film 5 after abnormalities occur continuously in the packaging roll body 1, the abnormalities continue to occur. It is difficult to effectively detect the wrinkles 7 on the wrap film 5 before they occur. Furthermore, in the case of method (2), the inspection may depend on the level of skill of the inspector, and there is a risk that variations may occur in the inspection.

The present invention was developed in view of the above, and is a packaging film that can detect wrinkles, etc. in cling film before an abnormality occurs, and that the accuracy of detecting wrinkles, etc. does not depend on the level of skill of the inspector. The object of the present invention is to provide a method for manufacturing a roll body.

In order to achieve the above-mentioned problems, in the present invention, an endless helper belt is used to move the roll that contacts the paper tube that has moved from the paper tube supply area to the paper tube rewinding area and the both ends of the paper tube in the paper tube rewinding area. It includes a pair of left and right drive mechanisms that press in the roll direction, and the helper belts of the left and right drive mechanisms are circulated to rotate the paper tube , and wrap film is wrapped in multiple layers around the rotating paper tube to form a packaging roll body. A method for producing a packaging roll body, comprising:
A pair of left and right drive mechanisms are arranged to face each other in the axial direction of the roll, and each drive mechanism has a chucking mechanism that chucks the end of the paper tube in the paper tube rewinding area with a rotatable chuck section, and a plurality of rotatable rollers. and a helper belt wound between the plurality of rollers, an encoder connected to a control determination means is attached to one of the plurality of rollers, and the rotational speed of the roller is determined by this encoder according to the circulation of the helper belt. Measure it by considering it as speed ,
The control determination means calculates a speed difference from the circulation speed of the pair of left and right helper belts and compares it with a threshold value, and as a result of the comparison, if the speed difference is equal to or greater than the threshold value, the control determination means stops driving the pair of left and right drive mechanisms. , when the speed difference is less than a threshold value, the pair of left and right drive mechanisms continues to be driven.

The control determination means calculates a speed difference from the circulation speed of the pair of left and right helper belts and compares it with a threshold value, and as a result of the comparison, if the speed difference is greater than the threshold value, it outputs a replacement time notification signal for the helper belts. It can be output.

Here, the roll in the claims may be a drum roll, a surface type surface roll, or the like. Furthermore, although the wrap film is mainly used for food packaging, it may be used for other packaging purposes if possible. This wrap film includes at least various transparent, opaque, and translucent long resin films and resin sheets. It is preferable that the helper belt of the drive mechanism rotates by indirectly contacting the paper tube extending in the horizontal and lateral directions.

According to the present invention, when the paper tube rotates, the circulation speeds of the helper belts in the pair of left and right drive mechanisms are respectively measured, and each measured value is output to the control determining means or the like. The control determining means calculates a speed difference from the circulation speeds of the pair of left and right helper belts , and compares the calculated speed difference with a threshold value. As a result of the comparison, when the helper belt is worn or deteriorated and the tension of the helper belt is reduced, the speed difference value will exceed the threshold value, and there is a high probability that wrinkles will occur in the wrap film wrapped around the paper tube . , at least the drive mechanism stops. On the other hand, when the helper belt has not yet experienced any wear or deterioration, the speed difference is less than the threshold value and there is a low probability that wrinkles will occur in the wrap film wrapped around the paper tube , so manufacturing of the packaging roll body can be continued. Ru.

According to the present invention , twisting of the paper tube and wrinkles of the wrap film can be predicted based on the difference in circulation speed between the left and right helper belts. Production can be interrupted or the helper belt of the drive mechanism can be replaced. Therefore, the appearance and appearance of the packaging roll body are less likely to deteriorate, and it is possible to prevent the manufactured packaging roll body from being continuously defective. Another advantage is that the accuracy of detecting wrinkles and the like is less dependent on the level of skill of the inspector. In addition, since the circulation speed of the helper belt is measured rather than the pressing force against the paper tube, the measured value is less affected by the deformation of the paper tube or the accuracy of the wrap film thickness, and the measured value is It is possible to reduce variations and obtain highly accurate values.

According to the second aspect of the invention , a speed difference is calculated from the circulation speed of the pair of left and right helper belts and compared with a threshold value, and as a result of the comparison, if the speed difference is equal to or greater than the threshold value, it is determined that it is time to replace the helper belts . Since a notification signal is output, based on the replacement time notification signal, for example, it is possible to quickly check the degree of wear of a helper belt that has started to slip, or to replace the helper belt to improve the operating rate of the rewinder.

FIG. 1 is an overall explanatory diagram schematically showing a rewinder in an embodiment of a method for manufacturing a packaging roll body according to the present invention. FIG. 2 is a perspective explanatory view schematically showing a drive mechanism of a rewinder, etc. in an embodiment of a method for manufacturing a packaging roll body according to the present invention. It is a principal part perspective view which shows typically the helper belt etc. of the drive mechanism in embodiment of the manufacturing method of the packaging roll body based on this invention. It is an explanatory view showing typically a relationship between a drum roll of a rewinder and a drive mechanism in an embodiment of a manufacturing method of a packaging roll body concerning the present invention. It is a perspective explanatory view showing a wrinkled packaging roll body in which a wrap film is wound in multiple layers around a paper tube.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. The method for manufacturing a packaging roll body in this embodiment includes a rewinder 10 that is closely opposed to a winding core 2, as shown in FIGS. 1 to 5. The helper belt of the pair of drive mechanisms 19 includes a drum roll 18 and a pair of left and right drive mechanisms 19 that press both ends of the winding core 2 that closely opposes the drum roll 18 in the direction of the drum roll 18 by means of a helper belt 22. 22 are circulated to rotate the winding core 2, and the wrap film 5 of the original fabric 4 is wound around the rotating winding core 2 to obtain the packaging roll body 1. The helper belt in the pair of drive mechanisms 19 The speed difference between the circulation speeds 22 is compared with a threshold value, and depending on the comparison result, the driving of at least one pair of drive mechanisms 19 is stopped or continued.

The core 2 of the packaging roll 1 is, as shown in FIG. 5, an elongated, cylindrical, inexpensive paper tube 3 that is made of spirally wound recycled paper and has excellent dust resistance and surface smoothness. It is said that A large number of paper tubes 3 are stored in the paper tube supply area of the rewinder 10, and are taken out one after another in a fallen state, and a wrap film 5 for food packaging is wound around the outer circumferential surface in multiple layers in a flat winding method. Into the visually visible attachment area in the center of the outermost layer of the wrap film 5, a strip-shaped white slip 6 is inserted to make it easier to grasp the free end of the outermost layer.

As shown in FIGS. 1 to 4, the rewinder 10 winds a wrap film 5 of a thick roll of raw material 4 around a drum roll 18 via a large number of rollers 13, and then rolls the wrapped wrap film 5 onto a paper tube. In the upstream part, a turret arm 11 for the original film 4 is rotatably supported, and in the midstream part, a number of rollers 13 for guiding the wrap film 5 are rotatably supported. , a rotatable drum roll 18 and a pair of left and right drive mechanisms 19 are respectively disposed in the downstream portion. A transparent strip-shaped wrap film 5 is wound around the core of the raw fabric 4, and a plurality of the raw fabrics 4 are rotatably supported on a turret arm 11. The wrap film 5 of the original fabric 4 is formed into a flexible thin film made of polyvinylidene chloride, polyvinyl chloride, polyethylene, etc., which have excellent heat resistance, water resistance, etc., for example.

The turret arm 11 includes a pair of arms 12 that face each other and sandwich the original fabric 4. The pair of arms 12 are rotatably supported between a supply position and a standby position. At one end, the winding core of the raw web 4 for supply is exchangeably supported via a chuck part that can move forward and backward, and at the other end of the pair of arms 12, the winding core of the spare web 4 moves forward and backward. It is exchangeably supported via a movable chuck part.

Such a turret arm 11 positions and arranges the original fabric 4 at one end at the supply position and feeds out the wrap film 5 to a number of rollers 13 downstream. When the amount is insufficient, the wrapping film 5 is rotated 180° to move the original film 4 with insufficient remaining amount of wrap film 5 from the supply position to the standby position, and also moves the spare original film 4 from the standby position to the supply position, The wrap film 5 of the spare web 4 that has been moved to the supply position is connected to the uncut wrap film 5 of the web 4 that has been moved to the standby position via a seal. It functions to brake and tear the wrap film 5 to pieces. Through this series of operations, the wrap film 5 is continuously supplied to a large number of downstream rollers 13.

The multiple rollers 13 include an unwinding roller 14 on which the wrap film 5 from the original fabric 4 positioned at the supply position is wound, and a plurality of guides around which the wrap film 5 from the unwinding roller 14 is wound. A roller 15, an expander roller 16 on which the wrap film 5 from the plurality of guide rollers 15 is wound, and a pinch on which the wrap film 5 is wound between the expander roller 16 and the downstream drum roll 18. A roller 17 is provided. A plurality of (three in this embodiment) guide rollers 15 are interposed between the unwinding roller 14 on the lower upstream side and the expander roller 16 on the downstream side, and are freely rotatable around the shafts at predetermined intervals in the vertical direction. be supported. Each guide roller 15 is located downstream of the unwinding roller 14 and functions to change the feeding direction of the wrap film 5 and to remove wrinkles and slack from the wrap film 5.

The expander roller 16 has a support shaft fitted into a roller part made of rubber, for example, and both ends of the support shaft protruding from the roller part are rotatably supported via bearings. It is curved downstream and removes wrinkles and slack from the wrap film 5. In addition, the pinch roller 17 has a support shaft fitted into a cylindrical roller portion made of rubber, for example, and both ends of the support shaft protruding from the roller portion are rotatably supported via bearings, and an expander roller. 16, the wrap film 5 is supplied to the drum roll 18 at a constant speed.

As shown in FIGS. 1 and 4, the drum roll 18 has at least a paper tube supply area, a paper tube rewind area, a packaging roll standby area, and a packaging roll discharge area formed around the periphery, and the drum roll 18 rotates between these areas. do. This drum roll 18 is rotated while slidingly contacting the outer circumferential surface of the paper tube 3 that has been moved from the lower paper tube supply area to the upper paper tube rewinding area, and is rotated so that the outer circumferential surface of the paper tube 3 is fed from the pinch roller 17. Wrap films 5 of a predetermined length are wrapped in multiple layers.

As shown in FIGS. 1 to 4, the pair of drive mechanisms 19 are disposed opposite to each other in the axial direction of the drum roll 18 (backward direction in FIG. 1), and horizontally move the paper tube 3 in the paper tube rewinding area. The paper tube 3 is chucked and held, and a driving force is transmitted to both ends of the paper tube 3 to rotate it. Each drive mechanism 19 includes a chucking mechanism 20 for chucking the end of the paper tube in the paper tube rewinding area with a rotatable chuck section, a plurality of rotatable rollers 21, and a winding mechanism 20 between the plurality of rotatable rollers 21. An encoder 23 for measuring the circulation speed of the helper belt 22 is attached to one of the plurality of rollers 21, and the paper core rewinding area, in other words, the drum roll 18 installed above.

The plurality of rollers 21 include a diameter-expanding roller 24 located above the drum roll 18 and rotatably driven and swingable in the vertical direction, and a diameter-reducing bearing roller 25 that rotates apart from below the diameter-expanding roller 24. , is provided with a diameter-reducing tension roller 26 that rotates and is located above between the diameter-expanding roller 24 and the bearing roller 25, and a rotary encoder 23 is attached to the diameter-expanding roller 24, and this encoder 23 is controlled. A connecting shaft is connected to the determining means 27 and to the bearing roller 25 of the drive mechanism 19 adjacent to the bearing roller 25 from the viewpoint of making the circulation speed of the pair of helper belts 22 uniform.

The encoder 23 is, for example, TRD-N2500-RZ [manufactured by Koyo Electronics Industry Co., Ltd.: product name], although not particularly limited, and is attached to the diameter expanding roller 24 or its vicinity to measure the rotational speed. However, the rotation speed of the diameter expanding roller 24 is regarded as the circulation speed of the helper belt 22 and is measured. The circulation speed of the helper belt 22 is measured because, for example, when trying to measure the pressing force against the paper tube 3, the measured value of the pressing force is affected by the deformation of the paper tube 3, the accuracy of the thickness of the wrap film 5, etc. This is because although variations occur, if the circulation speed is measured, the variations in the measured values are greatly reduced.

The control determination means 27 is, for example, a notebook-type personal computer, which is not particularly limited, and has dedicated software installed therein, and calculates (subtracts) a speed difference from the circulation speed of at least one pair of helper belts 22. a function to compare the calculated value of the speed difference with a threshold value serving as a reference value, and a function to stop the operation of the rewinder 10 including the pair of drive mechanisms 19 if the value of the speed difference is greater than or equal to the threshold value as a result of the comparison. A function of stopping the rewinder 10 and a function of continuing the operation of the rewinder 10 including the pair of drive mechanisms 19 when the speed difference value is less than the threshold value as a result of the comparison are realized.

The control determining means 27 has a function of outputting a replacement time notification signal for the helper belt 22 if the calculated speed difference value is greater than or equal to the threshold value as a result of comparing the calculated value of the speed difference with a threshold value, if necessary, By realizing this function, a warning light, a buzzer, etc. are activated, and it is possible to know when it is time to replace the helper belt 22. Further, the threshold value is not particularly limited, but based on past empirical rules, it is set at 5.0% or more, preferably 5.1% or more, and more preferably 5.2% or more of the speed difference. That's good.

Each helper belt 22 is formed into an endless flat belt made of a predetermined material, for example, and is tensioned around a diameter expanding roller 24, a bearing roller 25, and a tension roller 26, and is loosely threaded around a substantially U-shaped guide. It slides into contact with the end of the paper tube 3 which has been circulated and moved to the paper tube rewinding area while being guided by the chuck part, and presses the paper tube 3 in the direction of the drum roll 18 based on the elastic biasing action of the coil spring. It functions to rotate while rotating. The predetermined material for the helper belt 22 includes at least one of polyester woven fabric, polyester resin, thermoplastic polyurethane resin, vinyl chloride resin, etc. that contributes to food hygiene, etc., and preferably these are selectively laminated.

In the above configuration, when manufacturing the packaging roll body 1, when the rewinder 10 is started, the wrap film 5 of the thick roll of the raw material 4 is moved to the unwinding roller 14, the plurality of guide rollers 15, the expander roller 16, and the pinch roller 17. , and drum roll 18 in sequence. Further, the paper tube 3 moves from the paper tube supply area to the paper tube rewinding area, and both ends thereof are pressed in the direction of the drum roll 18 by the circulating helper belts 22 of the pair of drive mechanisms 19, and the paper tubes 3 are slid onto the helper belts 22. It touches and rotates.

In this way, the wrap film 5 of the original fabric 4 is supplied to the drum roll 18, and when the paper tube 3 rotates in the paper tube rewinding area, the wrap film 5 of the original fabric 4 is applied to the outer peripheral surface of the paper tube 3 rotating on the drum roll 18. is wrapped in multiple layers for a predetermined length, and then the wrapping paper 6 is inserted between the outer layer of the wrap film 5 and the mounting area at the center of the outermost layer, thereby manufacturing the packaging roll body 1. .

When the paper tube 3 rotates and the amount of rewinding of the wrap film 5 increases, the diameter expanding rollers 24 of the pair of drive mechanisms 19 gradually swing from the bottom to the top, thereby facilitating the rewinding of the wrap film 5. do. Further, when the paper tube 3 rotates, the circulation speed of the pair of helper belts 22 is measured by the encoder 23, and each measured value is output to the control determination means 27. The control determining means 27 calculates a speed difference from the circulation speeds of the pair of helper belts 22, and compares the value of the calculated speed difference with a threshold value serving as a reference value.

As a result of the comparison, if at least one of the helper belts 22 is worn or deteriorated and the tension of the helper belt 22 is reduced, the value of the speed difference becomes more than the threshold value, and the paper tube 3 may be twisted or rewinded. Since there is a high possibility that wrinkles 7 will occur in the circumferential direction of the wrap film 5 inside, the rewinder 10 will stop or a replacement time notification signal for the helper belt 22 will be output. On the other hand, if at least one helper belt 22 has not yet experienced wear or deterioration, the value of the speed difference will be less than the threshold value, and the paper tube 3 may be twisted or the wrap film 5 during rewinding may be wrinkled. Since there is no possibility that this will occur, the operation of the rewinder 10 continues.

According to the above, it is possible to predict the twisting of the paper tube 3 and the wrinkles 7 of the wrap film 5 based on the difference in the circulation speed of the pair of helper belts 22, so abnormalities occur continuously in the packaging roll body 1. It is possible to temporarily interrupt the production of the packaging roll body 1 before it is used, and quickly inspect and replace the helper belt 22 that has started to wear out. Therefore, the appearance and appearance of the packaging roll body 1 are not significantly deteriorated, and successive failures of the packaging roll body 1 can be prevented, and packaging roll bodies 1 of good quality can be mass-produced. Furthermore, since there is no need for an inspector to inspect the degree of wrinkles 7 and the winding hardness of the packaging roll body 1 on which the wrap film 5 has been re-wound, the inspection is not dependent on the level of skill of the inspector.

In addition, when trying to measure the parallelism of the paper tube 3 and the vertical and horizontal shake values and compare the threshold values, there is considerable variation in the measured values due to the deformation of the paper tube 3, the thickness accuracy of the wrap film 5, etc. However, since the circulation speed of the helper belt 22 is measured, highly accurate measured values can be easily obtained. Furthermore, since there is no need to particularly install an inspection camera, a light source, etc. for detecting wrinkles 7 in a narrow installation space around the drum roll 18 and drive mechanism 19, a significant reduction in the number of parts can be expected.

Although the paper tube supply area is shown below in the above embodiment, it is not particularly limited and may be provided above. Further, although the drum roll 18 is shown in the above embodiment, the invention is not limited to this in any way. For example, if the rewinder 10 is a surface type device, the drum roll 18 may be changed to a plurality of surface rolls, and each surface The roll and the paper tube 3 may be brought into rotatable contact, and the pair of helper belts 22 may be used for auxiliary rotation of the paper tube 3. Further, in the above embodiment, a small rotary type encoder 23 is used, but the present invention is not limited to this in any way. As long as the rotation speed of the diameter expanding roller 24 can be measured, the encoder 23 may be of an optical type, a magnetic type, or an electromagnetic induction type.

Further, although the rotary type encoder 23 is attached to the diameter expanding roller 24, the encoder 23 may be attached to the bearing roller 25 or the tension roller 26. Furthermore, in order to make the helper belt 22 easier to see, at least the exposed surface of the helper belt 22 can be colored in a chromatic color (for example, blue or red). Furthermore, the number and position of the diameter expanding roller 24, bearing roller 25, and tension roller 26 can be increased or decreased as appropriate.

The method for manufacturing a packaging roll body according to the present invention is used in the field of manufacturing wrap films and the like.

1 Packaging roll body 2 Winding core 3 Paper tube 4 Raw fabric 5 Wrap film (band body)
7 Wrinkle 10 Rewinder 11 Turret arm 13 Roller 18 Drum roll (roll)
19 Drive mechanism 20 Chucking mechanism 21 Roller 22 Helper belt (belt)
23 Encoder 24 Diameter expansion roller (roller)
25 Bearing roller (roller)
26 Tension roller (roller)
27 Control judgment means

Claims (2)

A roll that comes into contact with the paper tube that has moved from the paper tube supply area to the paper tube rewinding area , and a pair of left and right drive mechanisms that press both ends of the paper tube in the paper tube rewinding area in the roll direction with an endless helper belt . A method for manufacturing a packaging roll body, comprising: circulating helper belts of the pair of left and right drive mechanisms to rotate a paper tube , and winding a wrap film in multiple layers around the rotating paper tube to obtain a packaging roll body,
A pair of left and right drive mechanisms are arranged to face each other in the axial direction of the roll, and each drive mechanism has a chucking mechanism that chucks the end of the paper tube in the paper tube rewinding area with a rotatable chuck section, and a plurality of rotatable rollers. and a helper belt wound between the plurality of rollers, an encoder connected to a control determination means is attached to one of the plurality of rollers, and the rotational speed of the roller is determined by this encoder according to the circulation of the helper belt. Measure it by considering it as speed ,
The control determination means calculates a speed difference from the circulation speed of the pair of left and right helper belts and compares it with a threshold value, and as a result of the comparison, if the speed difference is equal to or greater than the threshold value, the control determination means stops driving the pair of left and right drive mechanisms. A method for manufacturing a packaging roll body, characterized in that, when the speed difference is less than a threshold value, driving of a pair of left and right drive mechanisms is continued. The control determination means calculates a speed difference from the circulation speed of the pair of left and right helper belts and compares it with a threshold value, and if the result of the comparison is that the speed difference is greater than or equal to the threshold value, outputs a replacement time notification signal for the helper belts. A method for manufacturing a packaging roll body according to claim 1 .

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