JPH0130743B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous monitoring device for the winding cut surface and winding surface of a surface winder, and more particularly to a continuous monitoring device for a surface winder for winding products in a paper manufacturing plant.

Generally, in a paper manufacturing plant, a spool is wound onto a spool from a paper machine and then re-wound in a winder to produce a product spool. Generally speaking, a winder has a product roll that is wound up on a drum roll of the winder.
Surface winders are often used in which the product is wound up while rotating due to the rotation of a drum roll.

In the above-mentioned surface winder, winding abnormalities such as lower winding wrinkles, lower winding torsion, stitching, and flower shapes may occur during winding rotation. In order to confirm the occurrence of such a winding abnormality as soon as it occurs, it is necessary to continuously monitor the winding surface or the winding cut surface during the winding rotation. However, in the case of high-speed winders, they operate at approximately 2,300 m/min, making it difficult for humans to monitor them. Therefore, in order to continuously monitor the rotating winding surface or winding cut surface, there is a method of manually tracking the emission frequency of the stroboscope so that it is synchronized with the rotation speed, but the above winding abnormality , which often occurs in the lower winding immediately after the start of winding, and in that case, since the winding is being accelerated, the winding rotation speed changes extremely and it is not easy to synchronize. Further, even when the drum roll is rotating at a constant rotation speed, the winding rotation speed changes due to a change in the winding diameter, so it is not easy to achieve complete synchronization.

The object of the present invention is to provide a surface winder with:
By installing a device that detects the winding diameter and winding speed and generates a pulse signal proportional to the winding speed, a general-purpose stroboscope can be made to emit light in synchronization with the winding speed, and the winding product can be easily detected. The object of the present invention is to enable early detection of defects appearing on the cut surfaces and surfaces of the manufacturing process.

The present invention provides a device that continuously monitors the winding cut surface and winding surface during winding rotation in a surface winder that rewinds paper wound from a paper machine as a product winding. , the continuous monitoring device includes means for detecting a winding diameter that changes during winding rotation;
A winding speed detection means, an arithmetic unit that calculates the winding rotation speed using output signals from the winding diameter detection means and the winding speed detection means, and a frequency corresponding to the output signal of the arithmetic unit. an oscillator that generates a pulse signal, and a stroboscope that receives the pulse signal from the oscillator as an external synchronization signal. Provided is a device for continuously monitoring the winding cut surface and winding surface of a surface winder, characterized in that the winding surface is irradiated.

A winding cut surface and winding surface continuous monitoring device of a surface winder as an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a continuous monitoring device according to the present invention. Figure 2 shows the first
FIG. 2 is a schematic diagram showing an example of a surface winder to which the monitoring device shown in the figure is applied. The monitoring device shown in Figure 1 is
It is composed of a winding diameter detecting means 11, a winding speed detecting means 12, a winding rotation speed calculator 13, a pulse oscillator 14, and a stroboscope 15. As the means for detecting the winding diameter and winding speed in the surface winder, known means as described below can be used. In the calculator 13, the rotation speed N=V/πD is calculated using the winding diameter detection output D and the winding speed detection output V. From the computing unit 13,
an output signal corresponding to the calculated winding rotation speed N;
(eg 1-5VDC) is supplied to the oscillator 14. The oscillator 14 generates a pulse signal having an oscillation frequency f proportional to the winding rotation speed N, and supplies it to the stroboscope 15 as an external synchronization signal. Floodlight 15a of stroboscope 15
is installed so that it illuminates the winding from the direction of the winding shaft when monitoring the winding cut surface, and from above or from the side when monitoring the winding surface. The light is emitted in synchronization with the number.

Next, a case where the monitoring device shown in FIG. 1 is applied to the surface winder shown in FIG. 2 will be explained. In addition, the second
Although a two-drum winder is shown in the figure, the present invention may be applied to other types of surface winders. In FIG. 2, the product winding 20 is placed on a front drum 22 and a rear drum 21.
Product winding 20 is carried out by the rotation of drums 21 and 22.
rotates and winds up the paper. The product winding 20 is also pressed between the front drum 22 and the rear drum 21 by a rider roll 23 from above. The vertical movement of the rider roll 23 is as follows:
This is converted into rotation of the pulley 24.

As a method for detecting the winding diameter of the surface winder shown in FIG. 2, a method has recently been used in which the rise of the rider roll 23 is detected by a pulse generator PLG attached to a pulley 24. In other words, as the diameter D ₀ of the winding core, the height H ₀ of the center of winding before the start of winding
If the height of the center of the rider roll 23 during winding is L, the winding diameter D is D=B ² −D _d ² +(2L+2H ₀ −D _r ) ² /2D _d +2(2L+2H
₀ −D _r )……(1) is given. Here, L is the pulse generator
The number of pulses P from PLG is given by L=L _nax /P ₀ ·P = πKD _s /P ₀ ·P (2). When formula (1) is rearranged using constants determined by the winder specifications, D=d+(b・p+c) ² /a+2(b・p
+c)...(3) However, in equation (3), a=2D _d , b=2πKD _s /P ₀ , C=2H ₀ −D _r , and d=B ² −D _d ² .

The calculation for detecting the take-up diameter from the rise of the rider roll is performed in the controller of recent winders, and when applying the monitoring device according to the present invention, it is sufficient to add an input/output unit. . In addition, if this is insufficient, a computing unit capable of performing the above calculations may be provided.

Next, the winding speed in the surface winder shown in Fig. 2 is detected by the tachota generator TG or pulse generator installed on the drum roll shaft.
It can be done by PLG.

FIG. 3 shows an example of changes in the winding speed and winding rotation speed immediately after the start of winding in the winder of FIG. 2. In the example shown in FIG. 3, the winding speed υ is accelerated at a constant acceleration α immediately after the start of winding, and after reaching the constant speed, winding is performed at a constant winding speed. Even in this case, the winding rotation speed N changes non-linearly as shown in the figure. In addition to this example,
When changing the acceleration α or when changing the winding speed υ, the winding rotation speed N changes in a more complicated manner.

A simple divider is sufficient as an arithmetic unit to calculate the winding rotation speed from the detection outputs of the winding diameter and winding speed, and if a programmable controller is provided, the program This can be done by simply adding additional input/output units. Furthermore, a commercially available oscillator that generates a pulse frequency commensurate with the winding rotation speed from the output of the arithmetic unit can be used. As the stroboscope, a general-purpose product with an external synchronization signal can be used. According to the test results, it is possible to confirm the lower volume by irradiating from a distance of 1 to 2 meters.

According to the continuous monitoring device according to the present invention described above,
By detecting the rotational speed of the winding, which changes non-linearly, and using this as a synchronization signal for the light emission frequency of a general-purpose stroboscope, the winding cutting surface and winding surface are always kept stationary regardless of changes in the rotational speed. This makes it possible to monitor product defects and discover product defects instantly. Therefore, when a defective winding occurs, the winder can be stopped immediately, and it is possible to improve the product yield, improve the quality of shipped products, and save labor. Furthermore, instead of human monitoring, if we could add an automatic detector with a pattern recognition function to detect defective winding,
It becomes possible to develop automatic winder stop in the event of winding abnormality.

Further, the continuous monitoring device according to the present invention is not limited to paper manufacturing plants, but can also be applied to other industries where surface wrapping is performed (film industry, textile or nonwoven fabric industry, etc.).

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a continuous monitoring device according to the present invention, and FIG. 2 is a diagram showing an example of a surface winder to which the monitoring device according to the present invention is applied.
Figure 3 shows changes in winding speed and winding rotation speed immediately after the start of winding in the surface winder shown in Figure 2.
It is a figure which shows an example. (Explanation of symbols), 11: Winding diameter detection means, 1
2: Winding speed detection means, 13: Arithmetic unit, 14: Oscillator, 15: Stroboscope, 15a: Floodlight, 20: Product winding, 21, 22: Drum roll, 23: Rider roll, 24: Pulley.

Claims (1)

[Claims] 1 A device that continuously monitors the winding cut surface and winding surface during winding rotation in a surface winder, which continuous monitoring device includes a winding diameter detection means that changes during winding rotation, A take-up speed detection means, a calculation unit that calculates the rotation speed of the take-up using the output signals from the take-up diameter detection means and the take-up speed detection means, and a frequency corresponding to the output signal of the calculation unit. The stroboscope is equipped with an oscillator that generates a pulse signal, and a stroboscope that receives the pulse signal from the oscillator as an external synchronization signal, so that the projector of the stroboscope detects the winding cut surface and the winding in synchronization with the rotation speed. A device for continuously monitoring the winding cut surface and winding surface of a surface winder, characterized in that the surface is irradiated.