JP5967863B2 - Automatic packaging machine feeding device - Google Patents

Description

  The present invention relates to a technology of a feeding device of an automatic packaging machine, and more particularly to a feeding device of an automatic packaging machine that continuously feeds a roll-shaped packaging material.

  Conventionally, a multi-row automatic packaging machine that obtains a plurality of stick-type packages (products) at a time by sealing and packaging powdery or granular packages such as drugs, luxury products, seasonings, and other foods. It is known. In such an automatic packaging machine, a long film-like packaging material is cut into a plurality of pieces while being continuously fed out by a feeding device, and each is folded into two in a U shape by a molding chute configured in multiple rows. . Next, the longitudinal edges of the packaging material are longitudinally sealed by a vertical seal bar constituting the sealing device to form a tube, and the tube-shaped packaging material is also provided for one package (one bag) by the horizontal seal bar constituting the sealing device. The product to be packaged is hermetically packaged by performing horizontal sealing every minute).

  In the automatic packaging machine described above, the packaging material is intermittently fed out in the longitudinal direction by the lateral seal device moving downward while the packaging material is laterally sealed while the packaging material is continuously fed out by the feeding device. In such a configuration, in order to stably obtain a package (product) of a constant quality while intermittently supplying a long packaging material along the transport path, the packaging material is fed and laterally fed by a feeding device. It is necessary to adjust the tension (tension) of the packaging material in the conveyance path in conjunction with the intermittent delivery of the packaging material by the sealing device.

  From this point of view, Patent Document 1 or Patent Document 2 as a conventional automatic packaging machine feeding device is provided with a feeding roller (feeding machine) and a dancer roller on the transport path, and the angle detector detects the angle of the dancer roller. Detecting and determining the rotation angle from the steady position, and when the rotation angle is large, the feeding roller feeding speed is increased, and when the rotation angle is small, the feeding roller feeding speed is controlled to be slow. Is disclosed. In such a configuration, the feeding speed of the feeding roller is variably controlled, so that the amount of the packaging material fed by the feeding device is insufficient and the packaging material is stretched or cut, or the packaging material is fed too much. It is intended to prevent the meandering from occurring due to the loose tension of the material.

  However, in the feeding device disclosed in Patent Document 1 or Patent Document 2 described above, the packaging material is always pressed by the rubber-lined presser roller in the feeding roller, and the packaging material is fed out in this state. Therefore, the packaging material slips on the feeding roller, and the packaging material cannot be fed out with a set feeding amount, and the tension of the packaging material may not be stably supplied. In particular, in such a feeding roller system, the tension of the packaging material slightly changes depending on the size of the roll-shaped packaging material, and the tension of the packaging material is precisely controlled even if the feeding speed of the feeding roller is varied. It was difficult.

  In addition, since a feeding roller is separately provided in the transport path for the roll-shaped packaging material supported by the reel, when the feeding device is stopped, the roll-shaped packaging material is rotated by being pulled by the packaging material. If the packaging material does not stop immediately due to inertia and the tension of the packaging material is loosened between the roll-shaped packaging material and the feeding roller, the packaging material will meander or the feeding device will start. Since the packaging material is drawn out from the roll-shaped packaging material in a state, the packaging material may be stretched or cut due to a heavy load on the packaging material.

  In this regard, Patent Document 2 includes a sensor that measures the diameter of the roll-shaped packaging material and a brake that applies a brake to the rotation of the roll-shaped packaging material between the roll-shaped packaging material and the feeding roller. As a result of measurement by the sensor, if the roll-shaped packaging material has a large diameter, the rotation of the roll-shaped packaging material is separately controlled by increasing the brake pressure and gradually decreasing the brake pressure as the diameter decreases. A feeding device configured as described above is disclosed. However, since the feeding roller system is also adopted, it is difficult to precisely control the tension of the packaging material. Further, in this configuration, the device configuration is complicated, and driving control and adjustment of the feeding roller and the brake are not possible. There was a problem of becoming complicated.

JP-A-10-147461 JP 2001-18920 A

  Therefore, the present invention relates to a feeding device for an automatic packaging machine, which solves the above-described conventional problems, and provides a feeding device for an automatic packaging machine that can control and supply the tension of a packaging material with a simple configuration with high precision. The purpose is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1, in the feeding device of the automatic packaging machine that continuously feeds the roll-shaped packaging material in conjunction with the intermittent feeding of the packaging material on the automatic packaging machine side, the roll-shaped packaging material A drive unit that rotationally drives the support shaft, a dancer roller that is in contact with the packaging material fed by the drive unit so as to be vertically movable, and a predetermined distance along the vertical direction at a position opposite to the dancer roller. A plurality of sensors disposed on the detection unit for detecting the vertical position of the dancer roller, and rotation of the support shaft by the drive unit according to the vertical position of the dancer roller detected by the detection unit A control unit for controlling the speed and adjusting the feeding amount of the packaging material, wherein the detection unit is disposed at the lowest position to detect a stopped dancer roller. Sensor, a reference sensor disposed above the end detection sensor for detecting a stationary dancer roller, and a dancer roller disposed sequentially above the reference sensor and moving in the vertical direction A plurality of movement position detection sensors for detecting the abnormality, and an abnormality detection sensor for detecting the stopped dancer roller disposed at the uppermost position above the movement position detection sensor. The control unit stops rotational driving of the support shaft by the drive unit while the dancer roller is detected by the end detection sensor, the reference sensor, and the abnormality detection sensor, and the plurality of movement positions When the dancer roller is detected by any of the detection sensor, as well as starting the rotation of the support shaft by the driving unit, either mobile position detection cell Each time the dancer roller is detected by the support, the support shaft by the drive unit is set to have a corresponding rotational speed that is set in advance so as to gradually increase in order of the moving position detection sensor disposed at the upper position. The rotation drive is switched .

  As an effect of the present invention, the tension of the packaging material can be precisely controlled and supplied with a simple configuration.

It is the side view which showed the whole structure of the automatic packaging machine using the feeding apparatus which concerns on one Example of this invention. It is a front view of the automatic packaging machine of FIG. It is a rear view of the feeding apparatus of a present Example. It is a side view of a detection apparatus. It is a block diagram which shows the structure of a control apparatus. It is a side view of the feeding apparatus for demonstrating the control method of a control apparatus. It is a side view of the feeding apparatus for demonstrating the control method of a control apparatus. It is a side view of the feeding apparatus for demonstrating the control method of a control apparatus.

  First, the overall configuration of the automatic packaging machine 100 using the feeding device 10 of the present embodiment will be outlined below. In the following embodiments, the arrow X direction in FIG. 1 is the vertical direction of the automatic packaging machine 100, the arrow Z direction is the longitudinal direction of the automatic packaging machine 100, and the arrow Y direction in FIG. To do.

  As shown in FIGS. 1 and 2, the automatic packaging machine 100 of the present embodiment is configured to supply a plurality of stick-type packaging bodies at a time while intermittently supplying the long packaging material 1 along the conveyance path R. It is configured as a multi-row automatic packaging machine that obtains (products). Specifically, a feeding device 10 for continuously feeding the packaging material 1, a filling device 11 for storing and weighing and filling the packaging material, a slitter device 12 for cutting the packaging material 1 into a plurality of pieces, and a packaging material 1. A molding chute 13 that folds 1 along the longitudinal direction, and a vertical sealing device 14 that seals and wraps the packaged material supplied from the filling device 11 by vertically sealing and laterally sealing the folded packaging material 1. And the horizontal sealing apparatus 15 and the cutter apparatus 16 etc. which cut | disconnect the packaging material 1 by which the to-be packaged object was sealed and packaged, and obtain a package body are comprised.

  A support shaft 20 that supports the roll-shaped packaging material 1 is disposed in the lower rear part of the machine body of the automatic packaging machine 100. The roll-shaped packaging material 1 supported by the support shaft 20 is supplied to the feeding device 10 of the present embodiment. Thus, the sheet is continuously fed in the downstream direction of the transport path R. Note that. Details of the feeding device 10 will be described later).

  A slitter device 12 is disposed at the upper rear part of the machine body, and a plurality of narrower ones (this embodiment) according to the number of rows (6 in this embodiment) of the molding chute 13 while the fed packaging material 1 is moved. Is cut into 6). The packaging material 1 cut by the slitter device 12 is respectively transferred to a corresponding molding chute 13 disposed in the upper front part of the machine body. The molding chute 13 is formed as a surface member that is widened in the upper part and narrowly narrowed in the lower part in order to fold the cut packaging material 1 in the longitudinal direction, and the packaging material 1 is formed along the surface. By continuously passing, the packaging material 1 is folded in two in a U shape in a horizontal sectional view.

  A filling device 11 is arranged above the molding chute 13, and the packaged object whose volume is measured by the filling device 11 is dropped and supplied to the molding chute 13 and is folded in two through the molding chute 13. The filled packaging material 1 is filled.

  A vertical sealing device 14 and a horizontal sealing device 15 are disposed below the molding chute 13 for longitudinally and laterally sealing the folded packaging material 1. The packaging material 1 folded in half by the molding chute 13 is vertically sealed at the mating edge portion by the vertical sealing device 14 to form a tube, and by the horizontal sealing device 15 disposed below the vertical sealing device 14. A horizontal seal is made to provide a bottomed state. And the to-be-packaged goods are intermittently supplied into the bottomed packaging material 1 through the molding chute 13 from the filling device 11, and the upper side of the packaging material 1 sent out in the longitudinal direction is laterally sealed. The package is sealed and packaged.

  In the automatic packaging machine 100 of the present embodiment, the horizontal sealing device 15 is provided so as to be movable up and down with respect to the main body, and the horizontal sealing device 15 moves downward while the packaging material 1 is laterally sealed. The material 1 is intermittently sent out in the longitudinal direction. That is, the packaging material 1 laterally sealed by the lateral sealing device 15 is filled with an article to be packaged through the molding chute 13 and at the same time, the packaging material 1 remains in the state of being held by the lateral sealing device 15 into one package. Feeding is performed by moving downward by a corresponding distance. And the to-be-packaged object is hermetically packaged by the lateral sealing device 15 being returned upward and the packaging material 1 being laterally sealed again.

  A cutter device 16 is disposed below the horizontal seal device 15, and the packaging material 1 in which the packaged object is hermetically packaged by the cutter device 16 is linearly cut (cut) at the central portion of the horizontal seal portion. Thus, a stick-type package is continuously obtained. The package cut by the cutter device 16 is discharged through a discharge duct 18 disposed at a lower position of the cutter device 16.

Next, the configuration of the feeding device 10 of this embodiment will be described in detail below.
As shown in FIGS. 1, 3, and 4, the feeding device 10 of this embodiment includes a drive motor 21 as a drive unit that rotationally drives the support shaft 20 of the roll-shaped packaging material 1, and a drive motor 21. Of the dancer roller 22 that is brought into contact with the packaging material 1 fed out in a vertically movable manner, a detection device 23 that detects the vertical position of the dancer roller 22, and the dancer roller 22 detected by the detection device 23. In accordance with the position in the vertical direction, the control unit 24 is configured to control the rotational speed of the support shaft 20 by the drive motor 21 to adjust the amount of the packaging material 1 fed out.

  The packaging material 1 fed out by the feeding device 10 is supplied along the transport path R to the slitter device 12 described above. A plurality of guide rollers 25 to 32, a regulation roller 33, and the like are disposed in the conveyance path R from the roll-shaped packaging material 1 as a supply source of the packaging material 1 to the slitter device 12. The packaging material 1 is supplied by being wound around these guide rollers 25 and the like at a predetermined holding angle.

  The guide rollers 25 to 27 are pivotally supported by support plates 34 and 34 provided at a lower position of the machine body, and the guide roller 28 is pivotally supported by support plates 35 and 35 provided at a front position of the support shaft 20. The guide rollers 29 to 32 and the regulating roller 33 are pivotally supported by support plates 36 and 36 provided along the vertical direction of the main body. These are rotatably supported by the roll body with respect to the support rotation shaft, and are rotated in conjunction with the packaging material 1 supplied along the transport path R. In addition, as described above, the regulation roller 33 is configured to regulate the delivery direction of the packaging material 1 when the packaging material 1 is intermittently delivered in the longitudinal direction by the lateral seal device 15.

  The support shaft 20 is pivotally supported by a support 37 provided at a lower position of the machine body as the rotational drive shaft of the roll-shaped packaging material 1, and the other end is also provided at a lower position of the machine body. It is pivotally supported by the support 38. The other end of the support shaft 20 is connected to a drive motor 21 described later so that power can be transmitted.

  The drive motor 21 is fixed to the support 38, and in this embodiment, a general-purpose gear motor that can be shifted and can be braked is used. In the drive motor 21, a drive gear 21 b provided on the drive shaft 21 a is meshed with a driven gear 20 a provided on the other end of the support shaft 20. The power of the drive motor 21 is transmitted to the support shaft 20 via the drive shaft 21a, and the support shaft 20 is rotationally driven at a predetermined rotational speed. The drive motor 21 is connected to a control device 24, which will be described later. The drive motor 21 is driven and controlled by the control device 24, and the rotation driving of the support shaft 20 is started and stopped, and its rotation speed is variably controlled. Is done.

  The dancer roller 22 is disposed between the guide rollers 30 and 31, and is supported by the support plates 36 and 36 so as to be movable up and down. Specifically, the dancer roller 22 is inserted into a long hole 36a whose both ends are opened along the vertical direction of the support plate 36 so that the vertical position can be changed, and is pressed against the packaging material 1 from above by its own weight. ing. The dancer roller 22 is rotated in accordance with the packaging material 1 supplied along the conveyance path R, and interlocks with the feeding of the packaging material 1 by the feeding device 10 and the intermittent feeding of the packaging material 1 by the lateral seal device 15. Thus, the position in the vertical direction is changed while being guided along the long hole 36a. That is, when the packaging material 1 is intermittently delivered by the horizontal sealing device 15, the packaging material 1 is moved upward, and when the lateral sealing device 15 is raised and the packaging material 1 is delivered by the feeding device 10, the packaging material 1 is moved downward. Moved towards.

  As shown in FIG. 4, the detection device 23 is configured as a sensor group that detects the vertical position of the dancer roller 22. Specifically, the detection device 23 is spaced apart from the above-described position of the dancer roller 22 by a predetermined distance along the vertical direction of the body. And a plurality of (seven in the present embodiment) sensors 23a, 23b,... (See FIG. 4).

  The sensors 23a, 23b,... Are disposed on a support plate 39 attached to the support plate 36. In the detection device 23 of the present embodiment, the sensors 23a, 23b,... Are of the same type and shape, and the type thereof is not particularly limited. For example, an induction type, a capacitance type, an ultrasonic wave are used. Various proximity sensors such as a mold, an electromagnetic wave type, and an infrared type can be used. Each of the sensors 23a, 23b,... Is connected to a control device 24, which will be described later, via a cable (not shown), and when the dancer roller 22 (the other end thereof) moved in the vertical direction at the facing position is detected. A detection signal is sent to the control device 24.

  Specifically, an end detection sensor 23a for detecting the vertical position of the dancer roller 22 that is stopped at the lowest position is disposed at the lowest position, and at the upper position of the end detection sensor 23a. A reference sensor 23b for detecting the vertical position of the dancer roller 22 in a stationary state when the feeding device 10 is stopped is provided. In addition, a first sensor 23c, a second sensor 23d, a third sensor 23e, and a fourth sensor 23f for detecting the vertical position of the dancer roller 22 moving along the vertical direction are located above the reference sensor 23b. They are arranged in order from below. An abnormality detection sensor 23g for detecting the vertical position of the dancer roller 22 stopped at the uppermost position is disposed at the uppermost position, which is the upper position of the fourth sensor 23f.

  Each of the sensors 23a, 23b,... Of the present embodiment is provided with a light emitting portion having a lamp light source at the end on the rear side of the machine body while being disposed on the support plate 39. When the other end is detected, a detection signal is transmitted to the control device 24, and the lamp light source of the light emitting unit is turned on.

  As shown in FIG. 5, the control device 24 is configured to be able to receive signals from the above-described detection device 23 (each sensor 23a, 23b...) And the like, and a CPU that executes various processes, A ROM for storing a program, a RAM as a working memory, a nonvolatile memory for temporarily storing detection signals output from the sensors 23a, 23b,. .

  The control device 24 controls the rotational speed of the support shaft 20 by the drive motor 21 in accordance with the vertical position of the dancer roller 22 detected by the detection device 23 in addition to starting and stopping the rotational drive of the support shaft 20. More specifically, the feed amount of the packaging material 1 is adjusted. Specifically, when the vertical position of the dancer roller 22 is increased, the rotational speed of the support shaft 20 by the drive motor 21 is increased, and the vertical movement of the dancer roller 22 is increased. When the directional position becomes low, the rotation speed of the support shaft 20 by the drive motor 21 is controlled to be slow.

  In the control device 24 of the present embodiment, the rotation speed of the support shaft 20 corresponding to the position of the dancer roller 22 in the vertical direction is set in advance, and the dancer roller 22 is set by any one of the first sensor 23c to the fourth sensor 23f. When the vertical position is detected, the rotational speed of the support shaft 20 by the drive motor 21 is switched so that the corresponding set speed is obtained. Note that the rotation speed of the support shaft 20 set in advance is set to a speed at which the feeding amount of the packaging material 1 by the feeding device 10 is not excessive or insufficient, corresponding to the feeding amount of the packaging material 1 by the lateral sealing device 15. Has been.

  Next, a control method of the control device 24 in the feeding device 10 of the present embodiment will be described with reference to FIGS. 4 and 6 to 8.

  As shown in FIG. 6A, in the feeding device 10 of this embodiment, the dancer roller 22 is stopped at a predetermined vertical position (reference position P1) when the operation is stopped. At this time, the vertical position (reference position P1) of the dancer roller 22 in the stopped state is detected by the reference sensor 23b, and the rotation drive of the support shaft 20 by the drive motor 21 is stopped by the control device 24.

  As shown in FIG. 4, when the automatic packaging machine 100 is started and the packaging material 1 is intermittently sent out by the lateral sealing device 15, the dancer roller 22 is moved upward. At this time, when the dancer roller 22 moved upward from the reference position P1 is detected by the first sensor 23c and the vertical position (first upper position P2) of the dancer roller 22 is detected, the control device 24 Thus, the support shaft 20 is rotated by the drive motor 21 so that the rotation speed is V1, and the packaging material 1 is fed out.

  In the automatic packaging machine 100 of this embodiment, the feeding of the packaging material 1 by the feeding device 10 and the intermittent feeding of the packaging material 1 by the lateral sealing device 15 are interlocked, so that the dancer roller 22 moves up and down with a predetermined movement width. Reciprocated in the direction. Then, as the feeding of the packaging material 1 proceeds, the amount of the packaging material 1 fed out by the feeding device 10 becomes insufficient with respect to the amount of the packaging material 1 fed out by the lateral seal device 15, so that the dancer roller 22 gradually moves upward. It will be moved. Therefore, in the control device 24, every time the dancer roller 22 is detected by the first sensor 23c to the fourth sensor 23f, the rotational speed of the support shaft 20 is increased or decreased so that the corresponding rotational speeds V1 to V4 are obtained.

  That is, as shown in FIG. 6B, when the feeding of the packaging material 1 proceeds and the diameter of the roll-shaped packaging material 1 gradually decreases, the packaging is performed in a state where the support shaft 20 is rotated at the rotational speed V1. The feed amount of the material 1 is insufficient. Therefore, as a result of the amount of the packaging material 1 fed out by the lateral sealing device 15 being increased, the dancer roller 22 is moved upward from the first upper position P2. At this time, when the dancer roller 22 is detected by the second sensor 23d and the vertical position (second upper position P3) of the dancer roller 22 is detected, the controller 24 causes the rotation speed V2 to be higher than the rotation speed V1. The rotational speed of the support shaft 20 by the drive motor 21 is controlled so as to satisfy (V1 <V2), and the feed amount of the packaging material 1 is adjusted.

  As shown in FIG. 7A, when the feeding of the packaging material 1 further proceeds and the diameter of the roll-shaped packaging material 1 is further reduced, the packaging material 1 is in a state where the support shaft 20 is rotated at the rotational speed V2. The feed amount of the packaging material 1 by the lateral seal device 15 is increased, and the dancer roller 22 is moved further upward than the second upper position P3. At this time, when the dancer roller 22 is detected by the third sensor 23e and the vertical position (third upper position P4) of the dancer roller 22 is detected, the control device 24 causes the rotational speed to be higher than the rotational speed V2. The rotational speed of the support shaft 20 by the drive motor 21 is controlled so as to satisfy V3 (V2 <V3), and the feed amount of the packaging material 1 is adjusted.

  Similarly, as shown in FIG. 7B, when the feeding of the packaging material 1 is further advanced and the diameter of the roll-shaped packaging material 1 is further reduced, the support shaft 20 is rotated at the rotational speed V3. The delivery amount of the packaging material 1 is insufficient, and the amount of delivery of the packaging material 1 by the lateral seal device 15 is increased, and the dancer roller 22 is moved further upward than the third upper position P4. At this time, when the dancer roller 22 is detected by the fourth sensor 23f and the vertical position (fourth upper position P5) of the dancer roller 22 is detected, the controller 24 causes the rotational speed to be higher than the rotational speed V3. The rotational speed of the support shaft 20 by the drive motor 21 is controlled so that V4 (V3 <V4), and the amount of the packaging material 1 fed out is adjusted.

  As shown in FIG. 8A, when the roll-shaped packaging material 1 supported by the support shaft 20 disappears, the packaging material 1 is detached from the support shaft 20, so that the dancer roller 22 pressed against the packaging material 1 is removed. It falls by its own weight and is locked at the lowest position of the long hole 36a. At this time, when the dancer roller 22 is detected by the end detection sensor 23a and the vertical position (lowermost position P0) of the dancer roller 22 is detected, the control device 24 rotates the support shaft 20 by the drive motor 21. The driving is stopped and the automatic packaging machine 100 is automatically stopped.

  Further, as shown in FIG. 8B, in the feeding device 10 of the present embodiment, when the feeding amount of the packaging material 1 by the feeding device 10 is largely insufficient with respect to the feeding amount of the packaging material 1 by the lateral sealing device 15, The dancer roller 22 pressed against the packaging material 1 is locked at the uppermost position of the long hole 36a. At this time, when the dancer roller 22 is detected by the abnormality detection sensor 23g and the vertical position (uppermost position P7) of the dancer roller 22 is detected, the control device 24 drives the support shaft 20 to rotate by the drive motor 21. Is stopped and the automatic packaging machine 100 is automatically stopped.

  As described above, the feeding device 10 of this embodiment rotates the support shaft 20 of the roll-shaped packaging material 1 in the feeding device 10 of the automatic packaging machine 100 that continuously feeds the roll-shaped packaging material 1. A drive motor 21, a dancer roller 22 that is brought into contact with the packaging material 1 fed out by the drive motor 21 so as to be movable up and down, a detection device 23 that detects a vertical position of the dancer roller 22, and a detection device 23 And a control device 24 that adjusts the amount of the packaging material 1 to be fed by controlling the rotational speed of the support shaft 20 by the drive motor 21 in accordance with the detected vertical position of the dancer roller 22. Thus, the tension of the packaging material 1 can be precisely controlled and supplied.

  That is, the feeding device 10 of the present embodiment is configured to feed the packaging material 1 by rotating the support shaft 20 of the roll-shaped packaging material 1 by the driving motor 21, and further by the detection device 23. By detecting the vertical position of the dancer roller 22, the control device 24 controls the rotational speed of the support shaft 20 by the driving motor 21 according to the vertical position of the dancer roller 22 to adjust the amount of the packaging material 1 fed out. Therefore, an excess or deficiency of the feeding amount with respect to the feeding amount of the packaging material 1 on the transport path R is detected from the vertical position of the dancer roller 22, and the packaging material 1 is fed so that the tension of the packaging material 1 is constant. The tension of the packaging material 1 can be precisely controlled by adjusting the amount. Therefore, the amount of the packaging material 1 fed out by the feeding device 10 is insufficient and the packaging material 1 is stretched or cut, or the amount of the packaging material 1 is too large and the tension of the packaging material is loosened to cause meandering. Can be prevented.

  In particular, in the feeding device 10 of this embodiment, the feeding roller system is not adopted as in the prior art, but the support shaft 20 of the roll-shaped packaging material 1 is directly rotated by the drive motor 21. Further, a sensor for measuring the diameter of the feeding roller and the roll-shaped packaging material, adjustment of the brake pressure, and the like are not necessary, and the feeding device 10 can be simply configured. And when stopping the feeding device 10, by stopping the support shaft 20 by the drive motor 21, the rotation of the roll-shaped packaging material 1 can be stopped immediately, and when starting the feeding device 10, Since the rotation of the roll-shaped packaging material 1 can be immediately rotated by driving the support shaft 20 directly by the drive motor 21, the roll-shaped packaging material 1 can be rotated regardless of the diameter of the packaging material 1. By controlling the tension precisely, meandering and cutting of the packaging material 1 as described above can be effectively prevented.

  Further, in the feeding device 10 of the present embodiment, the control device 24 increases the rotational speed of the support shaft 20 by the driving motor 21 when the vertical position of the dancer roller 22 increases, and drives when the vertical position of the dancer roller 22 decreases. Since the motor 21 for controlling the rotation speed of the support shaft 20 is controlled to be slow, the feeding amount of the packaging material 1 by the feeding device 10 with respect to the feeding amount of the packaging material 1 by the lateral seal device 15 is If the dancer roller 22 is moved toward the upper side of the machine due to a shortage, the rotational speed of the support shaft 20 is increased to increase the amount of the packaging material 1 fed, while the amount of the packaging material 1 delivered by the lateral sealing device 15 is increased. In contrast, when the amount of the packaging material 1 fed by the feeding device 10 increases and the dancer roller 22 moves downward, the rotational speed of the support shaft 20 is increased. The slow to thereby reduce the feed amount of packaging material 1, the tension of the packaging material 1 can be precisely controlled.

  Further, the control device 24 gradually increases the rotational speed of the support shaft 20 by the drive motor 21 as the dancer roller 22 is moved in the vertical direction, so that the feeding of the packaging material 1 proceeds and the roll-shaped packaging material 1 Even when the diameter gradually decreases, by gradually increasing the rotation speed of the support shaft 20, it is possible to prevent the amount of the packaging material 1 from being insufficient and to stabilize the tension of the packaging material 1. Can be supplied.

  Further, when the dancer roller 22 is detected at the uppermost position by the detection device 23, the control device 24 stops the driving motor 21, so that an abnormal feeding of the packaging material 1 occurs in the feeding device 10, and the lateral sealing device When the feeding amount of the packaging material 1 by the feeding device 10 is largely insufficient with respect to the feeding amount of the packaging material 1 by 15, the supply motor 21 is stopped to detect an abnormal supply of the packaging material 1 and the packaging material 1 1 elongation and cutting can be prevented.

  Further, the detection device 23 includes a plurality of sensors 23a, 23b,... Arranged at equal intervals along the vertical direction at a position opposed to the dancer roller 22, and therefore the control device 24 includes .., So that the rotational drive speed and rotational speed of the support shaft 20 by the drive motor 21 can be finely set so as to correspond to the sensors 23a, 23b..., And the tension control accuracy of the packaging material 1 can be improved. In particular, as in the present embodiment, the dancer roller 22 is brought into contact with the packaging material 1 so as to be movable up and down, and the vertical position is detected by the sensors 23a, 23b. Compared with the configuration in which the dancer roller 22 is connected to a rotating arm (dancer arm) and the rotation angle is detected as described above, the rotating roller arm is added to the packaging material 1 by the rotating operation (in the rotating direction). Since there is no influence of stress, the control accuracy of the tension of the packaging material 1 can be further improved.

  In addition, as a structure of the feeding apparatus 10, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention.

  In other words, the detection device 23 of the above-described embodiment includes the seven sensors 23a to 23g, but the number of sensors constituting the detection device 23 is not limited to this. In particular, in the detection device 23, more sensors (first sensor 23c to fourth sensor 23f in the present embodiment) for detecting the vertical position of the dancer roller 22 that is moving along the vertical direction are used. Since the rotational speed of the support shaft 20 by the drive motor 21 can be set more finely, the control accuracy of the tension of the packaging material 1 can be further improved.

  Moreover, in the control apparatus 24 of the Example (refer FIG. 5) mentioned above, the drive motor 21 and the detection apparatus 23 which were mentioned above are connected, and based on the detection signal from each sensor 23a * 23b ... of the detection apparatus 23. FIG. However, the control device 24 may be configured separately from the device for controlling the operation of the entire automatic packaging machine 100, or the device may be configured to control the drive motor 21. It may be integrated and configured integrally.

  Further, in the feeding device 10 of the above-described embodiment, the guide rollers 25 to 32, the regulation roller 33, and the like are disposed, but the arrangement and the number of the guide rollers 25 and the like are not limited thereto.

DESCRIPTION OF SYMBOLS 1 Packaging material 10 Feeding apparatus 20 Support shaft 21 Motor for drive (drive part)
22 Dancer Roller 23 Detector (Detector)
23a End detection sensor 23b Reference sensor 23c First sensor 23d Second sensor 23e Third sensor 23f Fourth sensor 23g Abnormality detection sensor 24 Control device (control unit)

Claims (1)

In the automatic packaging machine feeding device that continuously feeds the roll-shaped packaging material in conjunction with the intermittent feeding of the packaging material on the automatic packaging machine side,
A drive unit that rotationally drives the support shaft of the roll-shaped packaging material;
A dancer roller which is brought into contact with the packaging material fed out by the drive unit so as to be movable up and down;
A plurality of sensors arranged at equal intervals along the vertical direction at opposite positions of the dancer roller, and a detection unit for detecting the vertical position of the dancer roller;
A control unit that controls the rotational speed of the support shaft by the drive unit to adjust the amount of the packaging material fed according to the vertical position of the dancer roller detected by the detection unit;
Comprising
The detector is
An end detection sensor for detecting a stopped dancer roller disposed at the lowest position;
A reference sensor for detecting a stationary dancer roller disposed above the end detection sensor;
A plurality of movement position detection sensors for detecting dancer rollers that are arranged in order in the upper position of the reference sensor and moved in the vertical direction;
An abnormality detection sensor for detecting a stopped dancer roller disposed at an uppermost position which is an upper position of the movement position detection sensor;
The controller is
While the dancer roller is detected by the end detection sensor, the reference sensor, and the abnormality detection sensor, the drive unit stops rotating the support shaft,
When a dancer roller is detected by any of the plurality of movement position detection sensors, the drive unit starts to rotate the support shaft, and
Each time the dancer roller is detected by any one of the movement position detection sensors, the corresponding rotation speed is set in advance so as to gradually increase in order of the movement position detection sensor disposed at the upper position. Switching the rotational drive of the support shaft by the drive unit;
An automatic packaging machine feeding device characterized by the above.

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