JP3785757B2 - Winding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a winding device suitable for use when winding a long sheet such as a thin sheet such as a foil or a film or a wire.
[0002]
[Prior art]
As is well known, thin film sheets such as various film materials and metal foil materials, or members such as thin wires are wound around the winding drum once during the manufacturing process or after manufacturing, and then transported. Or have been stored.
When winding this type of material to be wound, the material to be wound has a thin wall or a small diameter. There is a problem that it is difficult to orderly wind the take-up drum unless it is wound with a uniform tension. Therefore, conventionally, a torque motor is used as a driving source of the winding drum, and the torque motor is driven and controlled while a tension detector detects the tension of the material to be wound which is sent between guide members such as rolls. A winding device is used.
[0003]
By the way, since the said to-be-winded material is generally a long thing, the whole length cannot be wound up with one winding drum. For this reason, after winding on a single winding drum, the feed of the material to be wound is once stopped and then cut, and the winding drum that has finished winding the cut end is removed and newly wound. The winding drum is wound around a winding drum mounted on the drum or a new winding drum provided adjacently, and the winding drum is driven again by a torque motor to wind the winding drum around the second winding drum. I like to go.
[0004]
[Problems to be solved by the invention]
However, in such a winding method, it takes time to change the winding drum, and the work efficiency is inferior because it is necessary to stop the feeding of the material to be wound during the changing. In addition, there is a problem that it cannot be applied to an apparatus that cannot be stopped in the process.
Therefore, a plurality of winding drums are installed in advance, and an accumulator is provided in the preceding stage of the winding device, and after the winding of one winding drum is finished, the material to be wound is cut and wound on another winding drum. There has also been proposed a method in which the material to be wound that is continuously fed is temporarily stored in the accumulator during the change.
[0005]
However, in such a winding device for performing continuous winding, when performing setup change between winding drums, when manually winding the material to be wound and rewinding it to a new winding drum, Once the rotational speed of the winding drum is reduced to a low-speed rotation that allows the above-mentioned rewinding, and immediately after starting a new winding, the excess material to be wound that has been stored in the accumulator is also wound. It is necessary to rotate the winding drum at a high speed. For this reason, as a drive source of the winding drum, a motor capable of variable speed over a wide range, such as a speed when winding the material to be wound, a low speed rotation at the time of setup change, and a high speed rotation at the start of winding Etc. need to be used. In addition, since the tension of the material to be wound may fluctuate in a large range as the speed changes, the drive source is controlled with good responsiveness so that the tension acting on the material to be wound is kept substantially constant. Need to hold. For this reason, with conventional torque motors, it is difficult to change the rotation speed smoothly over a wide range in parallel with winding, and it is relatively insensitive to torque fluctuations. The problem of not being possible arises.
[0006]
Therefore, it is conceivable to use an AC servo motor with excellent responsiveness and easy fine speed control as a driving source of the winding drum in the winding device. However, when winding the wound material, As a result of making the take-up speed variable within a large range, the tension changes greatly. For this reason, if it is attempted to control the rotation of the AC servo motor based on the detection signal from the tension detector, the response of the AC servo motor is too good for the mechanism of the entire winding device, and the original speed change As well as changes in tension based on the thickness of the material to be wound, local changes in tension based on errors in the thickness of the material to be wound, and fluctuations in mechanical rotation resistance in the guide roll, etc. Each time the AC servo motor responds sensitively to the signal, it causes excessive rotation fluctuations. As a result, the material to be wound becomes slack, or conversely, a large tensile force acts. There was a problem that smooth winding could not be performed.
[0007]
The present invention has been made in view of such circumstances, and can smoothly wind a thin sheet material, a thin wire, etc. around a plurality of winding drums, and thus has excellent workability. The object is to provide a winding device.
[0008]
[Means for Solving the Problems]
The winding device according to the present invention described in claim 1 is a winding drum that winds up a material to be wound that is sent along a plurality of guide members, a servo motor that drives the winding drum, and the guide. A weight roll which is disposed between the members so as to be movable forward and backward with respect to the material to be wound and applies a constant tension to the material to be wound, and a tension roller which is disposed on the rear side of the weight roll and detects the tension of the material to be wound. Tension detecting means for controlling the servo motor to make the tension of the material to be wound constant based on a detection signal from the tension detecting means, and the weight roll is provided below. A roller arm that is rotatably provided on one side of the material to be wound, and a roller arm that is rotatably provided at the tip of the roller arm and is inclined with respect to a vertical line. Abut A roller roll, a weight mounting arm fixed to the base end of the roller arm and extending in a direction opposite to the inclination direction of the roller arm with respect to the vertical line, an upper weight provided on the weight mounting arm, An upper weight or a lower weight that is pivotably suspended from the weight mounting arm is provided . Here, the invention described in claim 2 is characterized in that a plurality of the winding drums are provided.
[0010]
According to the winding device of the first or second aspect, since the servo motor is used as the driving source of the winding drum, the rotation of the winding drum can be freely changed with high accuracy over a wide range. . In addition, since a weight roll that applies a constant tension to the material to be wound is disposed between the guide members so as to be able to advance and retreat with respect to the material to be wound, the thickness dimension of the material to be wound is determined by this weight roll. In order to eliminate fine disturbances that occur instantaneously, such as local changes in tension based on errors in the machine and fluctuations in mechanical rotational resistance of the guide member, miscellaneous signals based on the disturbances are transmitted to the servo motor. It is never done.
[0011]
As a result, only the change in the tension based on the original speed change detected by the tension detecting means disposed in the subsequent stage of the weight roll is fed back to the servo motor. Combined with goodness, optimal tension and rotation speed control is performed, so even when the speed is changed over a wide range, slack occurs in the wound material, or conversely a large tensile force acts Therefore, the material to be wound can be wound smoothly and orderly. For this reason, it is possible to continuously wind the wound material around a plurality of winding drums without stopping the feeding of the wound material, and to further increase the feeding speed of the wound material. Therefore, work efficiency can be greatly improved.
[0012]
Therefore, the invention described in claim 1 has a remarkable effect particularly when a plurality of winding drums are provided as in the invention described in claim 2.
According to the winding device according to claim 1 or 2, the horizontal component of the weight of the upper weight disposed across the vertical line and the horizontal direction of the tension of the material to be wound acting on the servo roll. The material to be wound is fed between the guide members in a state where the component force is suspended. When the tension of the material to be wound increases momentarily, the servo roll is displaced to the vertical line against the upper weight, so that the excess tension is relieved. Conversely, when the tension of the material to be wound is momentarily reduced, the servo roll is pressed toward the material to be wound by the weight of the upper weight, and as a result, the tension of the material to be wound increases, Variations are absorbed.
[0013]
At this time, especially when the weight of the upper weight is light, when the tension suddenly increases or decreases, the acceleration during the movement increases, resulting in excessive response of the upper weight and conversely the tension of the material to be wound. May decrease or increase too much.
In this respect, in the above-described weight roll, since the lower weight is pivotably suspended from the upper weight or the weight mounting arm, the reaction force generated by the inertia reduces the acceleration of the upper weight and increases the excess weight. Therefore, instantaneous fluctuations in the tension of the material to be wound can be surely offset by these upper and lower weights and servo rolls.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment in which the winding device according to the present invention is applied to a winding device for a foil material which is a thin sheet material made of non-ferrous metal.
As shown in FIG. 1, in this winding device, in order to alternately wind up foils (materials to be wound) 2 sent along a plurality of guide rolls (guide members) 1. Take-up drums 3a and 3b are arranged, and the take-up drums 3a and 3b are each provided with an AC servo motor 4 as a drive source. Further, outside the winding drums 3a and 3b, the outer diameter of the foil 2 to be wound is measured in a non-contact manner, and the peripheral speed of the foil 2 is kept constant at each outer diameter dimension via a control means (not shown). An ultrasonic sensor 5 for controlling the rotational speed of the AC servo motor is installed.
And between the said guide rolls 1 and 1, the weight roll 6 for applying fixed tension | tensile_strength to the foil 2 is arrange | positioned.
[0015]
As shown in FIGS. 1 and 2, the weight roll 6 includes a roller arm 10 having a base end pivotally attached to a rotation shaft 1 a of one guide roll 1, and a distal end portion of the roller arm 10. And a servo roll 11 that contacts one side of the foil 2 that is fed downward in an inclined state, and is fixed to the base end of the roller arm 10 so as to be integrated with the roller arm 10. And a weight mounting arm 12 extending in a direction opposite to the inclination direction of the roller arm 11 with respect to the vertical line P, and an upper weight 13 provided on the weight mounting arm 12. And a lower weight 15 that is pivotably suspended via a lower arm 14 at a lower end portion of the weight mounting arm 12.
[0016]
Here, the weight mounting arm 12 has a male screw threaded on the outer peripheral portion thereof, and a plurality (two in the figure) of the upper weights 13 are detachably screwed onto the male screw. Thereby, in the weight roll 6, according to the thickness dimension, feed speed, etc. of the foil 2, an appropriate number of upper weights 13 can be mounted, and the distance from the rotating shaft 1a can be freely adjusted. ing. An upper end portion of the lower arm 14 is pivotally attached to the upper weight 13 positioned below, and the lower weight 15 is suspended from the lower end portion of the lower arm 14. The lower weight 15 is also detachably screwed to a lower weight mounting arm 16 having a male screw threaded on the outer periphery, and the number and distance from the upper weight 13 can be adjusted freely. Yes.
[0017]
Further, a tension detector (detection means) 17 for detecting the tension of the foil 2 is disposed on the guide roll 1 on the rear stage side of the weight roll 6, and based on the detection signal from the tension detector 17, The AC servo motor 4 is controlled by the control means so as to keep the tension of the foil 2 constant.
Further, in the preceding stage of the winding device having the above-described configuration, the roll 19 is shown by an arrow in the figure while one material of the winding drum is wound and the material to be wound is cut and wound to another winding drum. An accumulator 20 that stores a certain length of the foil 2 continuously fed by moving in the direction is disposed.
[0018]
Next, the operation of the winding device having the above configuration will be described.
First, the foil 2 is wound around one winding drum 3b. At this time, since the outer diameter of the winding drum 3b gradually increases as the foil 2 is wound, the outer diameter is continuously measured by the ultrasonic sensor 5, and the foil 2 is measured at each outer diameter by the control means. The rotation of the AC servomotor 4 is controlled so that the peripheral speed of the motor is constant. In parallel with this, the AC servomotor 4 is controlled by a detection signal from a tension detector 17 provided on the guide roll 1 to keep the tension of the foil 2 constant.
[0019]
Further, in the weight roll 6, the horizontal component of the weight of the upper weight 13 disposed across the vertical line P and the horizontal component of the tension of the foil 2 acting on the servo roll 11 are suspended. In the state, the foil 2 is sent downward between the guide rollers 1. When the tension of the foil 2 is momentarily increased due to the above-described disturbance, the servo roll 11 is displaced toward the vertical line P against the upper weight 13, thereby causing excessive tension. Is alleviated. Conversely, when the tension of the foil 2 is momentarily reduced, the servo roll 11 is pressed to the foil 2 side by the weight of the upper weight 13, and as a result, the tension of the foil 2 increases and the fluctuation is absorbed. Is done.
[0020]
When the winding of the winding drum 3b is completed, first, the rotational speed of the AC servo motor 4 is decreased, the foil 2 is cut, and this cut end is wound on the other winding drum 3a. To do. At this time, the roll 19 of the accumulator 20 moves upward in the figure, and the foils 2 sequentially fed are temporarily stored between the rolls 19. Further, since the tension in the foil 2 becomes 0 by cutting the foil 2, the upper weight 13 rotates to the vertical line P as shown by the arrow in the figure, and as a result, the servo roll 11 rotates toward the foil 2 side. Moves and stops at the position indicated by the dotted line in the figure.
[0021]
Next, winding on the winding drum 3a is started. At this time, by rotating the AC servo motor 4 at a speed higher than the speed of the foil 2 that is originally fed, the foil 2 stored between the rolls 19 of the accumulator 20 is also taken up. Is lowered to the normal position and the surplus foil 2 is eliminated, then the speed is reduced to a normal speed for winding the foil 2. In parallel with this, the wound take-up drum 3b is removed, and a new take-up drum is prepared at the position.
In this way, by sequentially repeating the above steps, the foil 2 continuously fed is wound up alternately on the winding drums 3a and 3b without stopping.
[0022]
As described above, according to the winding device, since the AC servo motor 4 is used as a drive source for the winding drums 3a and 3b, the winding drums 3a and 3b can be freely rotated with high accuracy over a wide range. Can be changed. In addition, a weight roll 6 that applies a constant tension to the foil 2 is disposed between the guide rolls 1 so as to be able to advance and retreat with respect to the foil 2. Therefore, it is possible to eliminate fine disturbances that occur instantaneously, such as local tension changes based on the above, and fluctuations in mechanical rotational resistance in the guide roll 1. It is possible to reliably prevent the signal from being transmitted.
[0023]
As a result, only the change in tension based on the original speed change detected by the tension detector 17 disposed at the subsequent stage of the weight roll 6 is fed back to the AC servomotor 4. Combined with the good response in the case, the optimum tension and rotation speed are controlled, so that even when the speed is changed over a wide range, the foil 2 may sag, or conversely, a large tensile force acts. The winding can be performed smoothly and orderly without any trouble.
For this reason, it is possible to continuously wind the foil 2 around a plurality of winding drums 3a, 3b without stopping the feeding of the foil 2, and to further increase the feeding speed of the foil 2. Therefore, the efficiency of the winding operation can be greatly improved.
[0024]
Further, in the weight roll 6, the lower weight 15 is pivotally suspended from the lower end portion of the upper weight 13 via the lower arm 14, so that when the tension of the foil 2 momentarily increases or decreases, Since the reaction force generated by the inertia of the weight 15 can reduce the acceleration of the upper weight 13 and suppress an excessive response, instantaneous fluctuations in the tension of the foil 2 are caused by the instantaneous fluctuation of the upper and lower weights 13 and 15 and the servo roll. 11 can reliably cancel out.
Moreover, since the external thread is formed in the outer peripheral part of the weight attachment arm 12 and the lower weight attachment arm 16, and the several upper weight 13 and the lower weight 15 are detachably screwed in this external thread, the thickness dimension of the foil 2 is attached. According to the feed rate and the like, the optimal number of upper weights 13 and lower weights 15 and their axial positions can be freely adjusted to prevent disturbance.
[0025]
In the above-described embodiment, the case where the winding device according to the present invention is applied only to the winding device of the foil 2 has been described. However, the present invention is not limited to this, and other various film materials, etc. Even if it is applied to a winding device such as a thin sheet or a thin wire such as an electric wire, the same effect can be obtained.
Further, the guide member is not limited to the guide roll 1, and in the above-described embodiment, the weight mounting arm 12 of the weight roll 6 and the like can be rotated coaxially with the rotation axis 1a on the guide roll 1. However, the present invention is not limited to this, and a shaft member that rotatably supports the weight mounting arm 12 may be provided between the guide rolls 1.
Furthermore, in the above-described embodiment, only the case where the AC servo motor 4 is used as the drive source of the winding drums 3a and 3b has been described. However, another servo motor having excellent responsiveness such as a DC servo motor is used. The same can be applied to the case.
[0026]
As described above, according to the winding device according to claim 1 or 2, since the servo motor is used, the rotation of the winding drum can be freely changed with high accuracy over a wide range. The weight roll can eliminate the disturbance that occurs instantaneously on the material to be wound, so that the miscellaneous signal based on the disturbance is not transmitted to the servo motor, which is combined with the good response of the servo motor. , Optimal rotation speed control can be performed. As a result, the material to be wound can be continuously and smoothly wound around a plurality of winding drums without stopping the feeding of the material to be wound, and the feeding speed of the material to be wound is increased. It is also possible to improve the work efficiency.
[0027]
In particular, since the lower weight is pivotably suspended from the lower end of the weight mounting arm to which the upper weight is attached, the inertia of the upper weight reduces the acceleration of the upper weight and suppresses excessive rotation. Therefore, the effect that the instantaneous fluctuation of the tension of the material to be wound can be surely canceled by the upper and lower weights and the servo roll can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a winding device of the present invention.
FIG. 2 is a front view showing the weight roll of FIG. 1;
[Explanation of symbols]
1 Guide roll (guide member)
2 Foil (rolled material)
3a, 3b Winding drum 4 AC servo motor 6 Weight roll 10 Roller arm 11 Servo roll 12 Weight mounting arm 13 Upper weight 14 Lower arm 15 Lower weight 17 Tension detector (tension detection means)
P Vertical line

Claims (2)

A winding drum for winding the material to be wound that is sent along a plurality of guide members, a servo motor that drives the winding drum, and a guide member that is disposed between the guide members so as to be movable forward and backward. A weight roll for applying a constant tension to the material to be wound, a tension detection means for detecting the tension of the material to be wound disposed on the rear side of the weight roll, and a detection signal from the tension detection means. And a control means for controlling the servo motor to keep the tension of the material to be wound constant, and the weight roll is rotated to one side of the material to be wound which is sent downward. A roller arm that is movably provided, a servo roll that is rotatably provided at the tip of the roller arm and in contact with the material to be wound in a state inclined with respect to a vertical line, and a base end portion of the roller arm A weight mounting arm that is fixed and extends in a direction opposite to the inclination direction of the roller arm with respect to the vertical line, an upper weight provided on the weight mounting arm, and the upper weight or the weight mounting arm is rotatable. And a lower weight suspended from the winding device.   The winding device according to claim 1, wherein a plurality of the winding drums are provided.

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