JPH0448488Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention relates to an automatic tension control device that controls the tension of a material by changing the roll diameter of a take-up roll or an unwind roll. The present invention relates to a coil diameter measuring and adjusting device that measures and adjusts the coil diameter.

[Prior art and problems] Measuring the winding diameter (hereinafter referred to as coil diameter) of a roll of paper, thin steel plate, etc. (hereinafter referred to as material) is essential for performing optimal automatic tension control according to the roll diameter. It's technology.

FIG. 3 shows the calibration of a measurement adjustment device conventionally used to measure the coil diameter.

1 is a winding roll or an unwinding roll, and material 2
contacts the measure roll 3, and the measure roll 3 rotates as the material 2 runs. 4 is a first roller attached to the shaft of the winding roll or unwinding roll 1;
The pulse generator outputs pulses corresponding to the rotation of the roll 1 and detects the rotation of the roll 1. Reference numeral 5 denotes a second pulse generator attached to the shaft of the measure roll 3, which outputs pulses corresponding to the running of the material 2 and detects the running amount of the material 2. 6 is a controller. 61 is a gate signal generation circuit, 62 is a gate signal generation circuit;
AND gate, 63 is a counter/latch circuit, 6
4 is a D/A converter, 65 is a first amplifier, 6
6 is a second amplifier, and 67 is a roll diameter display means. Reference numeral 7 indicates a power amplifier for amplifying the power of the output of the controller 6, and reference numeral 8 indicates a brake means for braking the rotation of the roll 1 in accordance with the output of the power amplifier.

FIG. 4 is a waveform diagram illustrating the operation of the main parts of the conventional coil diameter measuring and adjusting device. Below, the third
The problems of the prior art will be explained with reference to the drawings and FIG.

The coil diameter of the take-up roll or unwind roll 1 is
l ₁ , the roll diameter of the measure roll 3 is l ₂ , and further,
The roll shaft rotation speed of the take-up roll or unwinding roll 1 is n ₁ , and the roll shaft rotation speed of the measure roll 3 is n ₂
shall be. Since the roll 1 and the major roll 3 are interlocked via the material 2, the relationship of the first formula is maintained.

n ₁ · πl ₁ = n ₂ · πl ₂ (1) On the other hand, let P be the number of pulse outputs that the pulse generator 5 connected to the measure roll 3 outputs per one revolution of the roll 3, and the pulse generator 5 actually outputs n ₁ or n ₂
Letting the number of pulse outputs output during the rotation time be Pn, the relationship of the second equation is obtained from the ratio and the first equation.

l ₁ = 1/n ₁・Pn/P・l ₂ (2) That is, known measure roll diameter l ₂ , known P
value, and the value Pn obtained by counting the number of output pulses of the pulse generation 5 of the measure roll 3 when the roll 1 rotates once (n ₁ = 1 in the first equation above), and the second
By determining the coil diameter l ₁ from the formula. Fourth
Reference numeral 41 indicates a pulse output from the pulse generator 4 for each rotation of the coil 1, and 611 indicates the rotation pulse 4.
1 is the output gate signal of the gate signal generation circuit 61 which inputs 1, 51 is the pulse output from the pulse generator 5, and 621 is the output pulse of the AND gate 62, respectively. The counter 63 counts the output pulses to obtain Pn, and displays an analog value corresponding to the coil diameter _l1 on the roll diameter display means 67 via the D/A converter 64 and the amplifier 66 having a fixed amplification factor, This is used to measure the coil diameter. However, when adjusting or calibrating such a conventional coil diameter measuring and adjusting device, the pulse generator 4,
5 are connected to two separate signal generators with a pulse generation ratio of 1:Pn, the fixed amplification factor of the amplifier 66 is adjusted, and the coil of the display means 67 is adjusted to the actual diameter of the coil to be tested. Calibration is performed by matching the diameter display values.

However, according to such conventional technology, when the diameter of the measure roll is changed or the diameter of the roll is worn out, two signal generators are brought to the work site as described above to carry out wiring work, adjustment, and calibration work. This was extremely inefficient. Therefore, a mechanical rotation speed converting means such as a gear is inserted into the coupling part between the shaft of the measure roll 3 and the pulse generator 5 connected to the shaft, and the roll diameter l ₂ of the measure roll 3 is adjusted to Attempts have been made to mechanically adjust the number of output pulses P of the pulse generator 5 per rotation.

However, despite such improvements, the mechanism has become complicated and expensive, and workability has not been significantly improved, and other unresolved problems remain.

[Purpose of the invention] The present invention solves the unresolved problems of the conventional technology as described above, and provides a coil diameter measurement adjustment with excellent workability that allows efficient adjustment and calibration work with simple calibration. The purpose is to provide equipment.

[Summary of the invention] In order to achieve the above object, the present invention provides an automatic tension control device that controls tension according to changes in the diameter of the take-up roll or unwind roll. a first pulse generator that measures the travel distance of the material; a second pulse generator that is linked to a measure roll that measures the running amount of the material; and output signals of the first and second pulse generators that are input to the winding roll or Measure the coil diameter of the output roll,
and a control means for displaying and outputting necessary control signals, and further includes a control means for calibrating the coil diameter measuring device of the control means, for receiving the signal from the first pulse generator by means of a changeover switch during calibration. The circuit is connected to a circuit that emits a signal every time the signal of the calibration signal generation pulse generator reaches a set number of pulses, and the circuit that receives the signal of the second pulse generator is connected to the calibration signal generation pulse generator. A coil diameter measurement and adjustment device is constituted by comprising means for connecting to a generator, and gain adjustment means for calibrating the measured value of the coil diameter according to the coil diameter set for calibration, and the control means With the calibration signal generation means and gain adjustment means included in the
This makes it possible to easily and accurately adjust and calibrate measured values such as displayed values when required electrically.

[Embodiment] FIG. 1 shows a configuration diagram of an embodiment of a coil diameter measuring and adjusting device according to the present invention. In the figures, the same reference numerals as those in the explanatory diagram of the prior art (FIG. 3) indicate the same members having the same functions as those shown in the explanatory diagram, and detailed explanation thereof will be omitted.

In the present invention, a controller 6 as a control means is a pulse generator 9 as a calibration signal generating means.
0. Digital switch 9 which is a digital input means
1. It has a preset counter 92 and a switching means 93, and further has a variable amplification factor amplifier 94 as a gain adjusting means that can adjust and set the gain as desired.

FIG. 2 is a waveform diagram illustrating the operation of the main parts of this embodiment. Hereinafter, the operation of the present invention will be explained with reference to FIGS. 1 and 2.

In adjustment/calibration work such as when changing the measure roll 3, the actual roll diameter of the measure roll 3
l ₂ , the known number of generated pulses P per roll rotation output by the pulse generator 5, and the coil diameter l ₁ actually measured at that point in time of the coil 1, and calculate Pn using the second formula above. . Here, the Pn value, which is the calculated value, is the value when the coil diameter of the coil 1 is l ₁ in the ratio of the roll diameter of the new measure roll 3 that has been changed and the number P of pulses generated per rotation of the pulse generator 5. This value indicates that the pulse generator 5 generates a pulse of Pn at a certain time.

Next, the Pn value obtained as described above is set in the digital switch 91, and the changeover switch 93 is connected in conjunction with the symbol C in FIG. That is, instead of the signal from the first pulse signal generator 4, the signal from the calibration signal generation pulse generator 90 is calculated based on the ratio of the diameters of both rolls, and the signal is sent to the digital switch 9.
A circuit of a preset counter 92 that emits a signal every time the number of pulses set to 1 is reached is connected to the gate 61 of the circuit that receives the first pulse signal, and in place of the signal of the second pulse generator 5. ,
A calibration signal generating pulse generator 90 is connected to the gate 62 of the circuit that receives the signal of the second pulse generator.
Connecting. The waveform of the main part in the controller 6 at this time is the waveform 612 which is the output of the preset counter 92 which is input to the gate signal generation circuit 61,
FIG. 2 shows an output waveform 621 of the pulse generator 90 input to the AND gate 62, an output gate signal 622 of the gate signal generation circuit 61, and an output waveform 623 of the AND gate 62. That is, when the preset counter 92 advances the count up to the count number (Pn) set by the digital switch 91, it inputs an output pulse (612 in FIG. 2) to the gate signal generation circuit 61.

Therefore, the preset counter 92 outputs a count number (Pn) of pulses corresponding to the number of pulses generated by the pulse generator 5 directly connected to the measure roll during one revolution of the coil when the gate is open. Such an output signal 612 is the pulse outputted by the pulse generator 4 in the prior art (see FIG. 4).
This corresponds to 1). However, on the other hand,
The output waveform 621 of the pulse generator 90 input to the AND gate 62 corresponds to the pulse outputted by the pulse generator 5 in the prior art (FIG. 4, 51). Thus, the signal 623 gated by AND gate 62 becomes the signal shown (FIG. 2 623) having Pn pulses.

The output signal 623 of the AND gate 62 is input to a counter/latch circuit 63, where it is counted and latched. Furthermore, the output signal of the counter/latch circuit 63 is displayed in analog form on the roll diameter display means 67 via the D/A converter 64 and variable amplification amplifier 94.

Next, in the above state, _the roll diameter display means 67
Adjust and set the amplification factor of the amplification factor variable amplifier 94 so that the amplification factor is displayed.

As described above, according to this embodiment, the coil diameter measuring and adjusting device can easily and efficiently perform adjustment and calibration work.

Thereafter, the changeover switch 93 is connected to the M side in FIG. Thereafter, the measurement of the coil diameter _l1 is performed by the controller 6, which accurately displays the roll diameter based on the output signals of the first pulse generator 4 that is linked to the coil 1 and the second pulse generator 5 that is linked to the measure roll 3. It is something that can be done.

In addition, in the explanation of the above embodiment, the coil diameter was explained as being displayed using an analog value, but it is not limited thereto, and a digital display etc. can also be made. Also, the configuration of the calibration signal generating means is similar to that of the above embodiment. It goes without saying that the input means is not limited to, for example, a digital switch can be used as another input means.

[Effects of the invention] Hereinafter, according to the invention, the controller is provided with a calibration signal generating means, and during adjustment and calibration, the calibration means adjusts and sets the gain of the gain adjustment means provided in the controller to measure the coil diameter. It is possible to provide an efficient and economically superior coil diameter measurement and adjustment device that can easily and accurately optimize values and displays.

[Brief explanation of the drawing]

FIG. 1 is a calibration diagram showing an embodiment of the coil diameter measurement and adjustment device according to the present invention, FIG. 2 is a waveform diagram explaining the operation of the main part of the embodiment, and FIG. 3 is a configuration diagram showing a conventional technique. FIG. 4 is a waveform diagram illustrating the operation according to the prior art. 1... Winding roll or unwinding roll, 2...
Material, 3...Measure roll, 4...First pulse generator, 5...Second pulse generator, 6...Controller, 90...Pulse generator, 91...Digital switch, 92...Preset counter,
93...Switching means, 94...Variable gain amplifier.

Claims (1)

[Scope of utility model registration request] In an automatic tension control device that controls tension according to changes in the diameter of a take-up roll or an unwind roll, a first
a second pulse generator interlocked with the measure roll that measures the running distance of the material; and a second pulse generator that measures the running distance of the material, and output signals of the first and second pulse generators are input to control the winding roll or the unwinding roll. control means for measuring and displaying a coil diameter and outputting a necessary control signal; A circuit for receiving the signal from the second pulse generator is connected to a circuit for emitting a signal every time the signal from the calibration signal generating pulse generator reaches a set number of pulses, and a circuit for receiving the signal from the second pulse generator is connected to the circuit for receiving the signal from the second pulse generator. A coil for automatic tension control, characterized by comprising means for connecting to the pulse generator for generating a calibration signal, and gain adjustment means for calibrating the measured value of the coil diameter according to the coil diameter set for calibration. Diameter measurement adjustment device.