JP3035132B2 - Rewinder control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewinder control device for rewinding a sheet material on an unwinder via a belt.

[0002]

2. Description of the Related Art The prior art will be described with reference to FIGS. 3 and 4 show a block diagram of a conventional rewinder control device and a side view of an unwinder portion, respectively. The winding side is not shown. As shown in FIG. 3, the speed reference v from the speed reference generator 1 is transmitted to the unwinder surface motor 15 shown in FIG. In this way, the sheet material 10 is rewound from the unwinder 12 by the surface drive of the belt 13 driven by the surface motor 15, passes through the lead-in roll 11 which is a free roll, and is wound on the winding side (L in FIG. 4). Direction).

[0003]

In such a configuration,
The rewind controller repeats operation, stop, ie, acceleration / deceleration, in order to wind a plurality of rolls from the fully wound unwinder 12 to the winding side. At this time, if the diameter d of the unwinder 12 including the sheet material 10 is large, the unwinder 12
Moment of inertia GD ² is large, since the great torque is required at the time of acceleration or deceleration, Anwanda 12 and the belt 13
And a speed difference may occur between the speed and the speed on the winding side. In this case, during acceleration, the sheet is cut due to a shortage of the unwinding amount from the unwinder 12, so that an operation such as a sheet material removing operation or a sheet passing operation is required. . On the other hand, when the vehicle is decelerated, the excessive amount of the feed causes the thickening, so that the winding wrinkles are generated and the quality is deteriorated.

[0004] To cope with this, conventionally, an operator looks at the tension of the sheet material, operates an adjusting resistor attached to an operation desk (not shown), and adjusts the speed of the unwinder according to the speed of the winding side. Adjustment was made to prevent the sheet material from being stretched or tarred. However, this method requires the operator to stick to the operation desk and requires skill in the operation, which not only results in poor work efficiency, but also results in the occurrence of cuts in sheet materials and winding wrinkles if the adjustment is incorrect. The quality of the product was reduced.

Accordingly, an object of the present invention is to provide a rewinder control device which solves the above-mentioned problems, improves work efficiency and prevents quality deterioration.

[0006]

According to the present invention, there is provided a rewinding control device for rewinding a sheet material on an unwinder via a belt, comprising: a first motor for driving the belt; Speed reference generating means for generating a speed reference of the belt, speed change detecting means for detecting a speed change of the belt, unwinder surface control means for controlling the first electric motor according to the speed reference, and a spool included in the unwinder. A second motor for driving the unwinder, an unwinder moment of inertia calculating means for calculating an inertia moment of the unwinder including the sheet material, and a torque reference value to be given to the second motor from the speed change and the inertia moment of the unwinder. Torque reference calculating means, and an alarm for controlling the second motor in accordance with the torque reference value. It is characterized in that it comprises a Sunda central control unit.

[0007]

The rewinder control device according to the present invention calculates the torque of the unwinder which is excessive or insufficient at the time of acceleration / deceleration from the moment of inertia of the unwinder and the change in the speed of the belt at that time, and gives it to the unwinder.

Accordingly, it is possible to provide a rewinder control device which improves work efficiency and prevents quality deterioration such as occurrence of cut of sheet material and generation of wrinkles.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 are a block diagram and a side view, respectively, showing an embodiment of the present invention.

As shown in FIG. 2, an unwinder center motor 16 is connected to the spool 14 in addition to the unwinder surface motor 15, and transmits an insufficient torque to the unwinder 12 during acceleration / deceleration as described later.

As shown in FIG. 1, the speed reference v from the speed reference generator 1 is provided to an unwinder surface control device 8. The unwinder moment of inertia calculator 6 includes:
The diameter d of the unwinder 12 including the sheet material 10 from the unwinder diameter calculator 2, the sheet width w from the sheet width setting device 3,
Sheet density δ and spool 1 from sheet density setting device 4
Spool partial inertia constant GD _s ² of 4 spool diameter d _s and the spool 14 is provided. The speed reference v from the speed reference generator 1 is equal to the speed change detector 17.
And the speed change dv / dt is detected. The inertia moment GD _t ² calculated by the unwinder inertia moment calculator 6 and the speed change dv / dt detected by the speed change detector 17 are input to the torque reference calculator 7, and the torque reference T _t is calculated. It is provided to the unwinder center controller 9. The details will be described below.

First, the speed reference v from the speed reference generator 1
Is transmitted to the unwinder surface motor 15 via the unwinder surface control device 8, and the speed of the belt 13 is controlled by the unwinder surface motor 15 as shown in FIG. As a result, the sheet material 10 is conveyed at the speed reference v. However, during acceleration / deceleration, the torque tends to be excessive or insufficient only by driving the belt.
A slippage occurs between 3 and the unwinder 12. Therefore,
Torque reference T corresponding to excess or deficient torque during acceleration / deceleration
_t is transmitted to the unwinder center motor 16 via the unwinder center controller 9. This torque is applied to the unwinder 12 via the spool 14. This reduces slippage.

[0014] The calculation method of the torque T _t will be described below with reference to the operation of the unwinder inertia calculator 6 and torque reference calculator 7.

First, unwinder moment of inertia calculator 6
Will be described. Moment of inertia GD _t ² of the unwinder 12 is divided into a coil component inertia GD _c ² corresponding to the moment, that the coil component which corresponds to the spool partial inertia GD _s ² and the sheet material 10. The spool moment of inertia GD _s ² can be treated as a constant because the diameter of the spool 14 itself is constant.

On the other hand, the coil moment of inertia GD
_c ² is the unit of the coil moment of inertia GD _c ² [kg
M ² ], the unit of the diameter d of the unwinder 12 including the sheet material 10 is [m], the unit of the diameter d _s of the spool 14 is [m], the unit of the sheet width w is [mm], and the sheet density δ is if the unit and ^{[g / cm 3], GD} c 2 = 1/8 · π · w · δ · (d 4 -d s 4) expressed as ... (1).

[0017] Therefore, the unwinder 12 as a whole moment of inertia GD _t ² is ^{_{GD t 2 = GD c 2 +}} GD s 2 = 1/8 · π · w · δ · (d 4 -d s 4) + GD s 2 ...... ( 2) The above calculation is obtained by the unwinder moment of inertia calculator 6.

Next, the unwinder moment of inertia calculator 6
In a method for determining the torque reference T _t from the moment of inertia GD _t ² obtained with reference to the operation of the torque reference calculator 7 will be described.

First, the general formula of the acceleration torque T is as follows: T is the acceleration / deceleration torque, the unit is [kg · m], GD ² is the inertia coefficient, the unit is [kg · m ² ], and D is the rotational body. If the unit is [m] as the diameter, and the unit is [mpm / sec] with the dv / dt as the acceleration / deceleration, it can be expressed as follows.

T = {GD ² /(120×9.8)}×(1/D)×(dv/dt) (3) Accordingly, the torque reference T _{t of the} entire unwinder 12 is given by the equation (3). Is obtained by substituting the equation (2) above. That is, T _t = {GD _t ² /(120×9.8)}×(1/D)×(dv/dt)={(GD _c ² + GD _s ² ) / (120 × 9.8)} × (1 / D) × (dv / dt) = {(1/8) · π · w · δ · (d 4 -d s 4) + GD s 2} × {(1 / (120 × 9.8)} × (1 / D) × (dv / dt) (4) By providing the torque reference _Tt to the unwinder center control device 9, the torque that has become excessive or insufficient during acceleration / deceleration is compensated. Thus reducing slippage.

If a slippage occurs between the unwinder 12 and the belt 13 due to a disturbance or the like, the unwinder center motor 16 is torque-controlled, and may run out of control as it is. Therefore, by giving the speed reference v from the speed reference generator 1, that is, the speed on the winding side, to the unwinder center controller 9 as a speed limit in addition to the torque reference _Tt , the speed of the unwinder center motor 16 is increased. Does not rise above the speed reference v.

[0022]

According to the present invention, it is possible to realize a rewinder control device capable of improving work efficiency and preventing sheet breakage and winding wrinkles.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an unwinder part of the present invention.

FIG. 2 is a side view showing the embodiment of the present invention.

FIG. 3 is a block diagram showing a conventional unwinder part.

FIG. 4 is a side view showing a known unwinder.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 speed reference generator 2 unwinder diameter calculator 3 sheet width setting device 4 sheet density setting device 6 unwinder inertia moment calculator 7 torque reference calculator 8 unwinder surface control device 9 unwinder center control device 10 sheet material 11 lead-in roll 12 Unwinder 13 Belt 14 Spool 15 Unwinder surface motor 16 Unwinder center motor 17 Speed change detector

Claims (1)

(57) [Claims] 1. A rewind control device for rewinding a sheet material on an unwinder via a belt, a first motor for driving the belt, speed reference generating means for generating a speed reference for the belt, Speed change detecting means for detecting a change in the speed of the belt, unwinder surface control means for controlling the first electric motor according to the speed reference, and second means for driving the unwinder via a spool included in the unwinder. An electric motor; an unwinder moment of inertia calculating means for calculating an inertia moment of the unwinder including the sheet material; and a torque reference operation for calculating a torque reference value to be given to the second electric motor from the speed change and the inertia moment of the unwinder. Means for controlling the second electric motor according to the torque reference value Rewinder control apparatus characterized by comprising a down winder central control unit.