JP2011240982A - Automatic packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic packing machine including paper feed means using a servo motor and a length measuring machine detecting an actual operation amount of a film, the automatic packing machine detecting slip caused by wear or aging of a paper feed belt or a paper delivery roller and displaying a message urging a user to replace components.SOLUTION: Not only a difference 45 between an actual feed amount 42 of packing material detected by the length measuring machine 13 and a base feed amount 41 of the packing material is used to control the servo motor 15 but also the difference 45 is displayed as a slip amount 44 on a display unit 60 having setting means, wherein a slip allowable value 46 can be set, and when the slip amount exceeds the slip allowable value 46, a slip alarm 63 is displayed.

Description

  The present invention relates to an automatic packaging machine including a paper feeding means using a servo motor, a length measuring device for detecting an actual movement amount of a film, and a display having a setting means.

  In vertical or horizontal automatic wrapping machines, center seals are placed at both ends in the width direction of the packaging material that is pulled out from the original roll by the paper feed mechanism and fed in the downstream direction. The packaged product is charged, filled, or fed, and an end seal is applied in the width direction of the cylindrically shaped packaging material at a position between the packaged product and the packaged product. By cutting, the package body in which the packaged product is wrapped in the packaging bag is manufactured.

  In the horizontal automatic wrapping machine, the paper feeding mechanism includes a pair of rolls that feed a belt-shaped packaging material drawn from the anti-rolling roll into the cylinder making machine by rotating while pinching from above and below, and a cylinder by the cylinder making machine. It is composed of a pair of rolls that are sent to the downstream part by rotating while pressing both ends in the width direction of the packaging material formed in the left-right direction, and a servo motor is generally used as the drive source. Yes (see, for example, Patent Document 1).

  In the vertical automatic packaging machine, the paper feeding mechanism is formed in a cylindrical shape by being pulled out from the anti-roll roll and wound around the bag making and filling cylinder by a cylinder making machine, and the packaging material is arranged with the bag making and filling cylinder interposed therebetween. It is generally composed of a pair of endless belts that move in the downstream direction by moving while being pressed, and a servo motor is generally used as the drive source (see, for example, Patent Document 2).

  The servo motor is used as a drive source for the paper feed mechanism of the vertical or horizontal automatic packaging machine to ensure accurate feeding of the packaging material, but slip generated between the belt or roller and the packaging material. If this occurs, accurate feeding of the packaging material cannot be obtained. In order to make up for this drawback, it is known to provide a length measuring device that detects the amount of movement of the packaging material so that accurate feeding of the packaging material can be ensured by correcting the feeding amount (for example, patents). Reference 3).

JP 63-218008 (page 4, upper left column, lines 9 to 17 and FIG. 2) JP-A-8-2513 (paragraphs 2 to 3 and FIG. 1) JP-A-2001-213403 (paragraphs 13 to 28 and FIG. 3)

  As described above, if a servo motor is used as the drive source for the paper feed mechanism and a length measuring device that detects the actual amount of movement of the packaging material is used, the belt or roller may be worn or deteriorated and the Even if slipping occurs, if the slip amount is within the correction range of the servo motor, accurate feeding of the packaging material can be ensured. However, since the slip amount is corrected, the belt or roller is often left as it is without being noticed of wear or deterioration, and is often noticed only when the correction limit is exceeded. If the limit of correction is exceeded, even during production, the production must be interrupted and the belt or roller must be replaced, which has been a factor in reducing the operating rate of the automatic packaging machine. In order to avoid sudden production interruptions due to belt or roller wear or deterioration, visual inspection of the belt or roller is necessary as preventive maintenance activities, but visual inspection largely depends on the experience of the workers. There is also a drawback that the number of people who can perform inspections is limited.

  The automatic packaging machine accurately feeds the packaging material and does not depend on the operator's inspection work, and the automatic packaging machine itself does not slip the packaging material due to wear or deterioration of the belt or roller of the paper feeding mechanism. It is desired to have a function to prevent sudden machine failure by grasping at an initial stage, notifying an operator, and promoting preventive maintenance.

  The automatic wrapping machine of the present invention is an automatic wrapping machine having a paper feeding means using a servo motor, a length measuring device for detecting an actual film movement amount, and a display having a setting means. Not only is the difference between the detected amount of movement of the packaging material and the amount of the packaging material fed by the servo motor used for control, but the difference is displayed as a slip amount on a display device having the setting means. The purpose is to solve the problem.

In the present invention, a strip-shaped packaging material drawn out by a paper feed mechanism is fed in a downstream direction, formed into a cylindrical shape, bonded to both ends in the width direction, and a packaged product is input. In an automatic packaging machine that manufactures a bag package in which a product to be packaged is wrapped in a packaging bag by laminating at a position between the products in a transverse direction and cutting in the middle,
A servo motor for driving the paper feed mechanism;
A length measuring device for detecting an actual feed amount of the packaging material fed downstream by the paper feed mechanism;
The set basic feed amount of the packaging material is stored, a command is output to the servo motor according to the basic feed amount, and the actual feed amount of the packaging material input from the length measuring device and the basic feed amount A control means for correcting a command to the servo motor with a difference calculated by sequentially comparing a feed amount;
An indicator having a setting function for setting the basic feed amount and transferring it to the control means, and displaying the difference as a slip amount;
It is an automatic packaging machine characterized by comprising.

  The automatic packaging machine of the present invention can display the slip amount as a numerical value on a display device having the setting function.

  The automatic packaging machine of the present invention can display the transition of the slip amount on a display device having the setting function.

  The automatic packaging machine of the present invention can display the transition of the slip amount on a display having the setting function in a graph with time as the horizontal axis and change amount as the vertical axis.

  When the slip amount exceeds a reference value, the automatic packaging machine of the present invention can display a message for prompting replacement of the parts of the paper feeding mechanism on the display device having the setting function.

  The automatic packaging machine of the present invention can display an alarm on the indicator having the setting function and stop the machine when the slip amount exceeds a reference value.

  In the automatic packaging machine of the present invention, the reference value can be set by a display device having the setting function, and can be stored in the display device having the setting function or the control means.

  In the automatic packaging machine of the present invention, the indicator having the setting function can be a panel type indicator provided with a display screen contact type switch.

  The automatic packaging machine of the present invention can be a horizontal packaging machine in which a packaging material formed into a cylindrical shape is fed in the horizontal direction.

  The automatic packaging machine of the present invention can be a vertical packaging machine in which a packaging material formed into a cylindrical shape is fed in the vertical direction.

  The automatic wrapping machine of the present invention uses the difference between the feed amount of the packaging material and the actual movement amount of the packaging material as a feed amount correction value for control, accurately feeds the packaging material, and feeds the packaging material. The difference between the amount and the actual amount of movement of the packaging material is also used as a slip amount to indicate the wear and deterioration of the belt or roller of the paper feed mechanism at the initial stage, and suddenly by promoting preventive maintenance. Has the effect of preventing machine failure. Further, since the automatic packaging machine itself grasps the slip of the packaging material due to the wear and deterioration of the rollers, it does not depend on the operator's inspection work. Thereby, the preventive maintenance activity can be performed without depending on the experience value of the worker.

It is the schematic of a horizontal type automatic packaging machine. It is the schematic of a vertical type automatic packaging machine. It is the schematic which shows the relationship of the display which has a servomotor, a length measuring device, a control means, and a setting means. It is a figure of a slip amount monitor screen.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The outline of the operation of the horizontal automatic packaging machine in which the present invention is implemented will be described with reference to FIG. FIG. 1a) is a schematic view of a horizontal automatic packaging machine viewed from the side. FIG. 1b) is a schematic view of the vertical automatic packaging machine viewed from above. The arrow lines extending from the display 60 having the control means 40 and the setting means in FIG. 1a) represent the data flow. In the horizontal automatic wrapping machine shown in FIG. 1, the strip-shaped packaging material W drawn from the packaging material roll Wr by the paper feeding mechanism constituted by the paper feeding rollers 2 a and 2 b and the paper drawing rollers 4 a and 4 b is guided by the guide roll 50. , 51 and sent to the cylinder making machine 3. The cylinder making machine 3 folds the band-shaped packaging material W and overlaps the edges in the width direction to form the cylindrical packaging material Wf. The packaged product P is fed into the tubular packaging material Wf by a packaged product feeding mechanism (not shown), and a center seal 10 is applied by the center sealers 5a and 5b. The center sealers 5a and 5b incorporate heaters (not shown) inside, and are opposite to each other by heating and pressing the overlapping edge portions of the cylindrical packaging material Wf in which the packaged product P is accommodated from the left and right directions. By rotating in the direction, the cylindrical packaging material Wf in which the packaged product P is housed in the downstream end sealers 6a and 6b is provided while the center seal 10 is applied to the overlapped edge of the cylindrical packaging material Wf. send. The end sealers 6a and 6b incorporate a heater (not shown) and a cutting blade (not shown) inside, and are wrapped in a direction crossing the cylindrical packaging material Wf containing the packaged product P inside. At the position between the product P and the product to be packaged P, the end seal 12 is applied by heating and pressing from above and below, and the cylindrical packaging material Wf in which the product to be packaged P is housed is cut in the middle of the end seal 12. Thereby, the bag packaging body Bp which accommodated the to-be-packaged goods P in the inside is manufactured. Further, the horizontal automatic packaging machine shown in FIG. 1 is provided with a length measuring device 13 for measuring an actual feed amount 42. The length measuring device 13 is composed of a rotary encoder 11 and a length measuring roller 9 attached to the rotary shaft of the rotary encoder 11, and the guide roll 51 and the length measuring roller 9 are attached so as to sandwich the belt-shaped packaging material W. Yes. Since the length measuring roller 9 is in contact with the belt-shaped packaging material W, when the belt-shaped packaging material W is fed downstream by the paper feed mechanism, the length measuring roller 9 rotates. Thereby, the feed amount of the strip-shaped packaging material W can be measured by the rotary encoder 11. This is to maintain the accurate feed amount by correcting the feed amount even when the paper feed rollers 2a and 2b and the paper drawing rollers 4a and 4b of the paper feed mechanism and the belt-like packaging material W slip.

  The paper feed mechanism of the horizontal automatic packaging machine in which the present invention is implemented includes paper feed rollers 2a and 2b and paper drawing rollers 4a and 4b. The paper feed rollers 2a and 2b are driven by a servo motor 7 and rotate in opposite directions while sandwiching the belt-like packaging material W up and down to feed the belt-like packaging material W toward the downstream cylinder making machine 3. The paper drawing rollers 4a and 4b are driven by the servo motors 8a and 8b, and are opposite to each other while sandwiching the overlapped edge of the cylindrical packaging material Wf formed in a cylindrical shape by the cylinder making device 3 from the left and right directions. The cylindrical packaging material Wf is pulled out from the cylinder making device 3 and sent in the direction of the downstream center sealers 5a and 5b. The servo motors 7, 8 a, 8 b are controlled by the control means 40 so as to have a predetermined feed amount 43. The predetermined feed amount 43 is set by a display device 60 having setting means, and controls a basic feed amount 41 stored in the control means 40 and an actual feed amount 42 sent from the length measuring device 13 to the control means 40. The means 40 is determined by calculation. In the calculation for obtaining the predetermined feed amount 43, a difference between the basic feed amount 41 and the actual feed amount 42 is obtained, and by adding the value to the basic feed amount 41, the predetermined feed amount 43 is obtained. The difference between the basic feed amount 41 and the actual feed amount 42 is sent as a slip amount 44 to the display device 60 having setting means.

  Next, the outline of the operation of the vertical automatic packaging machine in which the present invention is implemented will be described with reference to FIG. FIG. 2a) is a schematic view of a vertical automatic packaging machine viewed from the side. FIG. 2b) is a schematic view of the vertical automatic packaging machine viewed from the front. The arrow lines extending from the display 60 having the control means 40 and the setting means in FIG. 2a) indicate the flow of data. In the vertical automatic packaging machine shown in FIG. 2, the strip-shaped packaging material W drawn from the packaging material roll Wr is guided by the guide rolls 52, 53 and 54 and sent to the cylinder making machine 3. The cylinder making device 3 forms the cylindrical packaging material Wf by overlapping the edges in the width direction so as to wrap the belt-shaped packaging material W around the bag-filling cylinder 14. The cylindrical packaging material Wf is intermittently fed downward by a predetermined feeding amount by the paper feeding belts 20a and 20b. The cylindrical packaging material Wf is temporarily stopped after being fed by a predetermined feed amount, and the center seal 10 and the end seal 12 are applied therebetween, and the packaged product P passes through the inside of the bag making and filling cylinder 14. Thrown through. The center seal 10 is applied by heating and pressing the overlapped edge from the left and right directions by center sealers 5a and 5b incorporating a heater (not shown). The end seal 12 is applied by being heated and pressed from the front-rear direction in a direction crossing the tubular packaging material Wf by end sealers 6a and 6b having heaters (not shown) incorporated therein. The cylindrical packaging material Wf in which the packaged product P is placed and the center seal 10 and the end seal 12 are applied is cut by a cutting blade (not shown) built in the end sealers 6a and 6b. Thereby, the bag packaging body Bp which accommodated the to-be-packaged goods P in the inside is manufactured. Further, the vertical automatic packaging machine shown in FIG. 2 is provided with a length measuring device 13 for measuring an actual feed amount 42. The length measuring device 13 is composed of a rotary encoder 11 and a length measuring roller 9 attached to the rotary shaft of the rotary encoder 11 so that the bag-filling cylinder 14 and the length measuring roller 9 pinch the cylindrical packaging material Wf. It is attached. Since the length measuring roller 9 is in contact with the tubular packaging material Wf, the length measuring roller 9 rotates when the tubular packaging material Wf is sent downstream by the paper feed mechanism. Thereby, the feed amount of the strip-shaped packaging material W can be measured by the rotary encoder 11. This is to maintain the accurate feed amount by correcting the feed amount even when the paper feed belts 20a, 20b of the paper feed mechanism and the belt-like packaging material W slip.

  The paper feed mechanism of the vertical automatic packaging machine in which the present invention is implemented includes a pair of paper feed belts 20a and 20b that are installed with the bag making and filling cylinder 14 in between. The paper feed belts 20a and 20b rotate the tube-shaped packaging material Wf in the direction of feeding the tube-shaped packaging material Wf downward while sandwiching the tube-shaped packaging material Wf between the bag-making and filling tube 14, and thereby the tube-shaped packaging material Wf. Send downstream. The paper feed belts 20a and 20b are driven by paper feed servomotors 7a and 7b, respectively. The paper feed servomotors 7a and 7b are controlled by the control means 40 so that a predetermined feed amount 43 is obtained. The predetermined feed amount 43 is set by a display device 60 having setting means, and controls a basic feed amount 41 stored in the control means 40 and an actual feed amount 42 sent from the length measuring device 13 to the control means 40. The means 40 is determined by calculation. In the calculation for obtaining the predetermined feed amount 43, a difference between the basic feed amount 41 and the actual feed amount 42 is obtained, and by adding the value to the basic feed amount 41, the predetermined feed amount 43 is obtained. The difference between the basic feed amount 41 and the actual feed amount 42 is sent as a slip amount 44 to the display device 60 having setting means.

  As described above, the paper feeding mechanism is driven by the servo motor and controlled by the control means 40 in both the case of the horizontal automatic packaging machine and the case of the vertical automatic packaging machine. The control means 40 obtains the difference between the basic feed amount 41 set by the display device 60 having the setting means and stored in the control means 40 and the actual feed amount 42 sent from the length measuring device 13 to the control means 40. By adding the value to the basic feed amount 41, a new predetermined feed amount 43 is determined to ensure an accurate feed amount, and the difference between the basic feed amount 41 and the actual feed amount 42 is determined as the slip amount. Reference numeral 44 is configured so that it can be sent to and monitored by a display device 60 having setting means. The details of the servo motor 7 or 7a, 7b, 8a, 8b of the paper feed mechanism, the length measuring device 13, the control means 40, and the display 60 having the setting means will be described with reference to FIG. The arrow line in FIG. 3 represents the flow of data. Also, the servo motor 15 serving as the drive source of the paper feed mechanism in FIG. 3 includes the paper feed servo motors 7a and 7b in the vertical automatic packaging machine, the paper feed servo motor 7 and the paper drawing servo motor 8a in the horizontal automatic packaging machine. , 8b respectively. The display device 60 having setting means in the present embodiment is a liquid crystal panel display device having a display screen contact type switch (hereinafter referred to as a touch switch). Setting is performed by a touch switch 62 and display is performed on a liquid crystal display 61. It is done by. The control means 40 stores the basic feed amount 41 of the packaging material set by the touch switch 62 of the display device 60 having the setting means in the storage unit 47, and the servo of the drive source of the paper feed mechanism according to the basic feed amount 41. The basic feed amount is calculated by a difference 45 calculated by sequentially comparing the actual feed amount 42 of the packaging material input from the length measuring device 13 and the basic feed amount 41 by outputting a predetermined feed amount 43 to the motor 15. 41 is corrected, and a predetermined feed amount 43 to the servo motor 15 as a drive source of the paper feed mechanism is commanded. Further, the difference 45 calculated by comparing the actual feed amount 42 of the packaging material and the basic feed amount 41 is also sent to the display device 60 having setting means. The display device 60 having setting means displays a difference 45 between the actual feed amount 42 of the packaging material sent from the control means 40 and the basic feed amount 41 on the liquid crystal display 61 as a slip amount 44. Further, the difference 45 is set by the touch switch 62 of the display device 60 having setting means, and is compared with the allowable slip value 46 stored in the storage unit 47 of the control means 40, and the comparison result exceeds the allowable slip value 46. The control means 40 causes the automatic packaging machine to stop the alarm machine, and the slip alarm display 63 is displayed on the liquid crystal display 61 of the display 60 having the setting means. In addition, as a process in the case where the slip allowable value 46 is exceeded, the control unit 40 does not stop the alarm of the automatic packaging machine and checks the paper feed belts 20a and 20b on the liquid crystal display 61 of the display device 60 having the setting unit. Alternatively, it is possible to display only the message 64 prompting the exchange.

  FIG. 4 is a diagram showing an example of a screen related to the slip amount displayed on the liquid crystal display 61 of the display device 60 having setting means. In this embodiment, the liquid crystal display is provided with a touch switch. Setting is performed by the touch switch 62 and display is performed by the liquid crystal display 61. The slip amount transition graph 34 in the central portion displays the transition of the slip amount 44 with time as the horizontal axis and the change amount as the vertical axis. Two thick horizontal lines on the graph represent the detection levels of the slip alarm standard 30 and the slip message standard 31, respectively. The slip alarm reference 30 is a function for stopping the automatic packaging machine when the slip amount 44 exceeding this level is detected. The setting for enabling or disabling this function and the setting of the detection reference value are different from each other. It is possible on the screen. The detection level of the slip message reference 31 is shown. The slip message reference 31 is a function for displaying a message display 64 prompting the inspection or replacement of the paper feed belts 20a, 20b on a display having a setting means when a slip amount 44 exceeding this level is detected. The setting for enabling or disabling and the setting of the detection reference value can be performed on another screen (not shown). The function of displaying the message display 64 prompting the inspection or replacement of the paper feed belts 20a and 20b is a function of displaying only the message on the liquid crystal display 61 while continuing the operation of the automatic packaging machine. The content of the message prompts the inspection or replacement of the paper feed belts 20a and 20b. If this slip message function is enabled and appropriate detection criteria are set, the wear and deterioration of the paper feed belts 20a and 20b are notified to the workers at the initial stage, and preventive maintenance is promoted to prevent sudden machine failure. be able to. It is also possible to sound a buzzer or turn on the signal tower when a message is displayed. The slip amount display 32 displayed at the top of the graph display is a real-time numerical display of the slip amount 44, and the slip amount peak display 33 is a numerical display of the peak value (maximum value) of the slip amount.

  As described above, as described in the embodiment of the present invention, the automatic packaging machine of the present invention not only automatically corrects the slip between the packaging material and the paper feed mechanism, but also displays the correction amount as the slip amount. In addition, it has a function to prevent sudden machine failure by notifying workers and monitoring preventive maintenance when the permissible value is exceeded and monitored.

Wr Wrapping material roll W Wrapping material Wf Tubular material Bp Bag package P Packaged product 2a, 2b Paper feed roller 3 Cylinder 4a, 4b Paper pulling roller 5a, 5b Center sealer 6a, 6b End sealer
7, 7a, 7b Paper feeding servo motors 8a, 8b Paper drawing servo motor 9 Measuring roller 10 Center seal 11 Rotary encoder 12 End seal 13 Length measuring device 14 Bag making and filling cylinder 15 Servo motor 20a as a driving source of the paper feeding mechanism, 20b Paper feed belt 30 Slip alarm reference 31 Slip message reference 32 Slip amount display 33 Slip amount peak display 34 Slip amount transition graph 40 Control means 41 Basic feed amount 42 Actual feed amount 43 Predetermined feed amount 44 Slip amount 45 Basic amount Difference between feed amount and actual feed amount 46 Slip allowable value 47 Storage section 50, 51, 52, 53, 54 Guide roll 60 Display with setting means 61 Liquid crystal display 62 Touch switch 63 Slip alarm display 64 Inspection of paper feed belt Or message display prompting replacement

Claims (10)

The strip-shaped packaging material drawn out by the paper feeding mechanism is sent in the downstream direction, formed into a cylindrical shape, bonded to both ends in the width direction, the packaged product is charged, and between the packaged product and the packaged product In an automatic packaging machine that manufactures a bag package in which a product to be wrapped is wrapped in a packaging bag by laminating at a position in a transverse direction and cutting in the middle,
A servo motor for driving the paper feed mechanism;
A length measuring device for detecting an actual feed amount of the packaging material fed downstream by the paper feed mechanism;
The set basic feed amount of the packaging material is stored, a command is output to the servo motor according to the basic feed amount, and the actual feed amount of the packaging material input from the length measuring device and the basic feed amount A control means for correcting a command to the servo motor with a difference calculated by sequentially comparing a feed amount;
An indicator having a setting function for setting the basic feed amount and transferring it to the control means, and displaying the difference as a slip amount;
An automatic packaging machine characterized by comprising.   2. The automatic packaging machine according to claim 1, further comprising a function of displaying the slip amount as a numerical value on a display device having the setting function.   The automatic packaging machine according to claim 1, wherein the automatic packaging machine has a function of displaying a transition of the slip amount on a display device having the setting function.   The automatic packaging machine according to claim 3, wherein the automatic packaging machine has a function of displaying the transition of the slip amount on a display having the setting function in a graph with time as a horizontal axis and change amount as a vertical axis. .   The display device having the setting function has a function of displaying a message prompting replacement of parts of the paper feeding mechanism when the slip amount exceeds a reference value. Automatic packaging machine.   2. The automatic packaging machine according to claim 1, wherein when the slip amount exceeds a reference value, the automatic packaging machine has a function of displaying an alarm on a display device having the setting function and stopping the machine.   7. The reference value can be set by a display device having the setting function, and has a function of storing in the display device having the setting function or the control means. Automatic packaging machine as described in.   The automatic packaging machine according to any one of claims 1 to 7, wherein the display device having the setting function is a panel-type display device provided with a display screen contact type switch.   The automatic packaging machine according to any one of claims 1 to 8, wherein the automatic packaging machine is a horizontal automatic packaging machine in which the cylindrical packaging material is fed in a horizontal direction. . The automatic packaging machine according to any one of claims 1 to 8, wherein the automatic packaging machine is a vertical automatic packaging machine in which the cylindrically shaped packaging material is fed in a vertical direction. Machine.

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