JPH0311274Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a drive device for a shrink-proofing machine for fabric.

(Prior art) As a fabric shrink-proofing machine, the fabric is introduced between a fabric supply section that takes out the fabric on a transport vehicle, a steam-heated main drum, and an endless rubber belt that is pressed around the main drum. A rubber belt section is configured to shrink the fabric, a Palmer section is configured to wind the fabric sent from the rubber belt section around a Palmer cylinder to dry it, and a shaker is used to shake off the fabric sent out from the Palmer section onto a transport vehicle. It is known that the drop sections are arranged in order.

In order to operate these fabric supply section, rubber belt section, palmer section, and shake-off section at speeds corresponding to the expansion and contraction of the fabric, a side shaft is provided along the series of devices described above, and this side shaft is driven by a motor. Either the side shaft and the drive shaft of each of the above parts are individually connected by a transmission, or a synchronous motor with the same rotational speed is provided for each part of the fabric supply part, rubber belt part, palmer part, and shake-off part. This synchronous motor drives each of the above-mentioned parts via a transmission.

(Problem to be solved by the invention) When each part of the fabric supply part, rubber belt part, palmer part, and shake-off part is driven by one motor, it is necessary to adjust the speed of this motor or the gear ratio between the motor and the side shaft. By changing the power supply frequency of the synchronous motor if a synchronous motor is provided for each of the above parts, the overall speed level can be changed all at once without changing the speed ratio between each part. I can do it. However, if it is necessary to change the speed ratio between the fabric supply section, rubber belt section, palmer section, and shake-off section depending on the type of fabric, the side shaft and the drive shaft of each section may be changed. Since the connecting transmissions and the transmissions connecting the synchronous motors and drive shafts of each part are mechanical, it is necessary to install an expensive transmission for each part, and the gear ratio must be reset. The work is extremely tedious,
Moreover, there was a problem that the speed ratio after the change was inaccurate.

This invention provides a drive device for a fabric preshrunk machine that does not require an expensive mechanical transmission, can be remotely controlled, and can easily and accurately reset the gear ratio regardless of individual differences. It is something to do.

(Means for Solving the Problems) A rubber belt portion in which a fabric is introduced between a steam-heated main drum and an endless rubber belt that is pressed against the circumferential surface of the main drum so as to be contracted, and the rubber belt portion is made to shrink. In a fabric shrink-proofing machine equipped with a Palmer section in which the fabric sent out from a belt section is wound around a Palmer cylinder and dried, AC motors are separately provided to drive the main drum and the Palmer cylinder, respectively. A speed adjustment inverter is interposed in each power supply circuit of these AC motors, and a speed setting device is provided to set a predetermined speed signal voltage corresponding to one of the speed adjustment inverters, and this speed An AD converter that converts the speed signal voltage into a corresponding digital signal is connected between the setting device and the control power input terminal of the inverter, and the output signal of this AD converter is converted into the original speed signal voltage. a ratio setting device for setting the ratio of the speed signal voltage of one speed signal to the speed signal voltage of the other speed signal voltage, that is, the speed ratio, in a digital value, in correspondence with the other speed adjusting inverter; A speed detector is provided for detecting the rotational speed of the motor, and the speed ratio set in the ratio setter and the speed detector are connected between the ratio setter and the control power input terminal of the inverter. Based on the detected rotational speed of the AC motor and the digitized speed signal voltage set by the speed setting device corresponding to one of the inverters and output from the AD converter, the detected rotational speed is determined relative to the target rotational speed of the AC motor. an arithmetic device that calculates the deviation and outputs a corrected speed signal obtained by changing the target rotational speed in a direction to make the deviation zero; and a DA that converts the corrected speed signal into a speed signal voltage of the inverter.
It is characterized by being equipped with a converter.

(Operation) The power frequency of each AC motor that drives the main drum and the Palmer cylinder is adjusted to a frequency that corresponds to the voltage applied to the control power input terminal of the corresponding speed adjusting inverter. Therefore,
The main drum and Palmer cylinder rotate at a speed corresponding to the voltage applied to the control power input terminal of the corresponding inverter. Then, the speed signal voltage of a predetermined voltage output from the speed setting device is input to one of the main drum and the Palmer cylinder, for example, the speed adjustment inverter for the main drum. Rotate at the appropriate speed.

On the other hand, a speed signal voltage corresponding to the corrected speed signal output from the arithmetic unit is applied to the control power input terminal of the Palmer cylinder inverter. That is, the target rotation speed of the Palmer cylinder AC motor is calculated from the digitized speed signal voltage set for the main drum (rotation speed of the main drum AC motor) and the speed ratio set for the Palmer cylinder. The deviation is determined by subtracting the detected rotational speed of the AC motor from this target rotational speed. The target rotational speed is accelerated or decelerated according to this deviation, and the corrected speed signal after this acceleration or deceleration is output from the calculation device, converted to a speed signal voltage by the DA converter, and inputted to the control power source of the Palmer cylinder inverter. A voltage is applied to the terminal, and as a result, the Palmer cylinder AC motor rotates at a speed accelerated or decelerated with respect to the target rotation speed. When the deviation is large, the amount of acceleration or deceleration also becomes large, and when the deviation becomes zero, the amount of acceleration or deceleration also becomes zero, and the Palmer cylinder AC motor rotates at the target rotation speed.

(Example) In FIG. 1, the fabric supply section A includes guide bars 1a, 1b for taking out the fabric F on a transport vehicle (not shown), feed rollers 2, guide rollers 3a, 3b, 3c, 3d, Consisting of 3e,
Feed roller 2 is driven by AC motor Ma. Further, the rubber belt section B includes an entrance guide roller 4a, a main drum 5, an endless rubber belt 6, pressure rollers 7a and 7b, and an exit side guide roller 4.
The main drum 5 is driven by an AC motor Mb, and the fabric F introduced between the main drum 5 and the rubber belt 6 is contracted. Further, the Palmer section C includes an entrance side guide roller 8a,
It consists of a Palmer cylinder 9 and exit side guide rollers 8b and 8c, and the Palmer cylinder 9 is driven by an AC motor Mc to advance the fabric F while drying it. The shake-off section D consists of a shake-off roller 10 and a cloth guide 11 that swings back and forth.The shake-off roller 10 is driven by an AC motor Md, and the cloth guide 11 is moved back and forth by the transmission from the shake-off roller 10. The fabric F is swung downwards to a transport vehicle (not shown).

In this embodiment, the speed ratio of the remaining feed roller AC motor Ma, Palmer cylinder AC motor Mc, and shake-off roller AC motor Md is determined based on the rotational speed of the main drum AC motor Mb of the rubber belt section B. The ratio is set by a ratio setting device P, the details of which are shown in FIG.

A speed adjusting inverter 12b for varying the motor speed by changing the power supply frequency is interposed in the power supply circuit of the main drum AC motor Mb, and a control voltage of this inverter 12b is output from a comparison regulator 13b. This comparison regulator 13b converts the output pulse of the rotary encoder 14b, which detects the rotational speed of the main drum AC motor Mb, into an analog signal.
A feedback function that compares the DA converter with the rotation signal voltage of the main drum AC motor Mb output by this DA converter and a reference speed signal voltage that is input separately, and outputs a signal in the direction of zeroing the difference. This reference speed signal voltage is set by a speed setting device 15, is digitized by an AD converter 16, and then
It is returned to the original state by the DA converter 17 and the comparator controller 13
b. A reference counter 18 is connected to the output terminal of the rotary encoder 14b, and switches 18a and 1 of another circuit are connected until the output pulses of the rotary encoder 14b reach a predetermined number.
8c and 18d are closed.

AC motor for feed roller of fabric supply section A
Similarly to the above, Ma also has a speed adjustment inverter 12.
a, a comparison adjuster 13a and a rotary encoder 14a are attached. Therefore, the control circuit of this feed roller inverter 12a is provided with a ratio setting device 19a for setting the rotational speed ratio of the main drum AC motor Mb and the feed roller AC motor Ma using a digital value. The target rotation speed of AC motor Mb is 1000 r/m, and the target rotation speed of AC motor Ma for feed roller is
At 1100 r/m, a speed ratio of 1.1 between the two is input to the ratio setter 19a. This ratio setting device 19a
A multiplier 20a, a subtracter 21a, an integrator 22a, and an adder 23a are connected in this order to the output side of the multiplier 20a, and the output side of the multiplier 20a is connected to the adder 23a.
The main drum circuit is connected to the input side of the multiplier 20a.
A switch 18a is connected to the output side of the AD converter 16 and is opened and closed by the reference counter 18 between the rotary encoder 14a and the subtracter 21a.
and a feed roller pulse counter 24a are connected, and the speed ratio (for example, 1.1) input to the ratio setter 19a is sent to the multiplier 20a, and the main drum feed roller pulse counter 24a is sent from the AD converter 16 on the main drum side. Multiplied by a reference speed signal (for example, 1000) corresponding to the target rotation speed of AC motor Mb,
The product (eg, 1100) is sent to subtracter 21a and adder 23a.

The subtracter 21a calculates the above product, that is, the target rotational speed of the feed roller AC motor Ma and the AC motor sent from the feed roller encoder 14a via the switch 18a and counted by the feed roller pulse counter 24a.
The deviation between Ma and the detected speed is calculated, and this deviation is sent to the integrator 22a and integrated.

On the other hand, in the adder 23a, the target rotational speed and the integrated value of the deviation inputted from the adder 23a are added. For example, when the target rotational speed output from the multiplier 20a is 1100r/m and the detected speed sent from the feed roller pulse counter 24a is 1000r/m, that is, it is slower than the target rotational speed by 100r/m, and the deviation is 100r/m. /m, and when the integrated value in the integrator 22a is zero, the target rotation speed is 1100 r/m from the adder 23a.
and the above deviation 100r/m, the sum of 1200r/m, i.e.
A signal is output to speed it up by 100r/m. Also, the detection speed is 1200r/m, which is lower than the target rotational speed.
When the speed is 100 r/m faster and the deviation is -100 r/m, the adder 23a outputs a signal that is 1000 r/m slower, that is, 100 r/m. Then, the output of the adder 23a is input to the DA converter 25a, converted into a speed signal voltage of the feed roller AC motor Ma, and input to the comparison regulator 13a.
This operation continues until the above deviation disappears.

Similar to the main drum comparison regulator 13b, a detected speed signal of the AC motor Ma is fed back to the comparison regulator 13a from the rotary encoder 14a, and a DA converter 25 is fed back to the comparison regulator 13a.
The speed signal voltage inputted from the rotary encoder 14a is controlled based on the detected speed signal from the rotary encoder 14a, and then applied to the control power input terminal of the inverter 12a to control the speed of the AC motor Ma.

AC motor for Palmer cylinder in Palmer section C
Similar to the AC motor Ma for the feed roller of the fabric supply section A, Mc includes a speed adjustment inverter 12c, a comparator 13c, a rotary encoder 14c, a ratio setter 19c, a multiplier 20c, a subtracter 21c, An integrator 22c, an adder 23c, a pulse counter 24c and a DA converter 5c are provided, and similarly to the above, the acceleration/deceleration of the Palmer cylinder AC motor Mc is calculated and converted into a speed signal voltage via the DA converter 25c. The signal is sent to the comparison controller 13c.

In addition, the AC motor for the shaking-off roller of the shaking-off section D
Similarly to the above, Md has a speed adjustment inverter 12.
d, comparison adjuster 13d, rotary encoder 14
d, ratio setter 19d, multiplier 20d, subtracter 2
1d, an integrator 22d, an adder 23d, a pulse counter 24d and a DA converter 25d,
Similarly to the above, the acceleration/deceleration of the shake-off roller AC motor Md is calculated, converted to a speed signal voltage via the DA converter 25d, and sent to the comparison regulator 13d.

As described above, in this embodiment, the feed roller 2 of the fabric supply section A and the shaking-off roller 10 of the shaking-off section D are provided with AC motors Ma and Md, respectively, and their rotational speeds are controlled in the same manner as the Palmer cylinder 9. Since it is controlled, it is useful when a fabric shrink-proofing machine is provided independently. Further, in this embodiment, an integrator 22 is provided between the subtracter 21a and the adder 23a of the arithmetic unit that calculates the acceleration/deceleration of the fabric supply section A, palmer section C, and shake-off section D.
Since a is provided and the deviation obtained by subtraction is integrated, the target speed can be quickly reached. Also, comparison regulators 13a, 13c, 13d for feedback control are provided for the inverters 12a, 12c, 12d of each part other than the rubber belt part B, and ratio setters 19a to 19d and DA Converters 25a-25
Since the system is designed to perform double feedback control with the feedback control by a series of arithmetic units between d and AC motors Ma, Mb, Mc,
Md can be operated at extremely precise speed ratios.

(Effects of the invention) This invention provides driving AC motors for the rubber belt section and the palmer section, attaches an inverter for speed adjustment to each of these AC motors, and adjusts the voltage of the control power supply to control each AC. Sets the speed of the motor, eliminating the need for a traditional transmission;
In addition, since the rotational speed of each AC motor is controlled by feedback, the rotational speed of each AC motor is accurately maintained at the desired target speed. In addition, by setting the speed of one of the rubber belt section and the palmer section with the speed setting device, and setting the speed of the other with the ratio setting device, the speed at which this other AC motor should be driven can be calculated. Therefore, the setting of the speed ratio can be changed instantaneously, there is no difference between individuals, and accurate speed ratio setting and driving are possible.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of an embodiment of this invention, and FIG. 2 is a circuit diagram of the main parts. F: Fabric, A: Fabric supply section, B: Rubber belt section, C: Palmer section, D: Shaking off section, Ma, Mb,
Mc, Md: AC motor, 2: Feed roller,
5: Main drum, 6: Rubber belt, 9: Palmer cylinder, 10: Shaking off roller, 12a, 12b,
12c, 12d: Speed adjustment inverter, 13
a, 13b, 13c, 13d: Comparison adjuster, 14
a, 14b, 14c, 14d: rotary encoder (speed detector), 15: speed setting device, 16:
AD converter, 17, 25a, 25b, 25c, 2
5d: DA converter, 18: Reference counter, 18
a, 18c, 18d: switches opened and closed by the reference counter 18; 19a, 19c, 19d:
Ratio setter, 20a, 20c, 20d: multiplier,
21a, 21c, 21d: subtractor, 22a, 22
c, 22d: integrator, 23a, 23c, 23d:
Adder, 24a, 24c, 24d: pulse counter.

Claims (1)

[Scope of utility model registration request] A rubber belt section in which a fabric is introduced and contracted between a steam-heated main drum and an endless rubber belt that is pressed against the circumferential surface of the main drum, and a Palmer cylinder is used to transport the fabric sent out from the rubber belt section. In a fabric preshrunk machine equipped with a palmer section that is wound around the fabric to dry it, separate AC motors are provided to drive the main drum and palmer cylinder, and each power supply circuit for each of these AC motors is A speed adjustment inverter is interposed, a speed setting device is provided for setting a predetermined speed signal voltage corresponding to one of the speed adjustment inverters, and the speed setting device and the control power supply for the inverter are connected to each other. An AD converter that converts the speed signal voltage into a corresponding digital signal and a DA converter that converts the output signal of the AD converter into the original speed signal voltage are interposed between the input terminal and the speed signal voltage. A ratio setting device for setting the ratio of the speed signal voltage of the one speed signal to the other speed signal voltage, that is, the speed ratio, in a digital value corresponding to the other speed adjusting inverter, and a ratio setting device for detecting the rotational speed of the AC motor. A speed detector is provided respectively, and the speed ratio set in the ratio setter, the rotational speed of the AC motor detected by the speed detector, Then, the deviation of the detected rotational speed from the target rotational speed of the AC motor is calculated based on the digitized speed signal voltage set by the speed setting device corresponding to one of the above inverters and output from the AD converter, and this deviation is reduced to zero. an arithmetic device that outputs a corrected speed signal obtained by changing the target rotational speed in a direction in which the target rotational speed is changed; and a DA that converts the corrected speed signal into a speed signal voltage of the inverter.
A drive device for a fabric shrink-proofing machine, characterized by being equipped with a converter.