JP2008262797A - Heat treatment roller with power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate wiring in order to supply an electric power to a temperature detector and a signal conversion transmission circuit installed at the roller on the rotation side in a heat-treatment roller which is equipped with a temperature detector installed in the wall-thickness of the heat-treatment roller and a signal conversion transmission circuit installed at the roller which converts the detected signal of the temperature detector into a digital signal to wireless transmit it to a temperature controller installed at the exterior of the roller. <P>SOLUTION: The heat treatment roller is equipped with the temperature detector 1 installed in the wall thickness of the heat-treatment roller shell 20, and the signal conversion transmission circuit 29 installed at the roller to wireless transmit the signal to the temperature controller 31 installed at the exterior the roller. At a journal 24a of the roller, a power supply device 33 is installed which supplies electric power to the temperature detector 1 and the signal conversion transmission circuit 29 and which is composed of a power generator to generate the electric power by rotation of the roller and a secondary battery. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat treatment roller with a power supply device.

In heat treatment rollers such as induction heat generation rollers that have induction coils placed inside the hollow of the roller body and rollers that allow thermal fluid to flow through the hollow of the roller body, a temperature detector is placed within the thickness of the roller and the temperature is detected. In some cases, the surface temperature of the roller is maintained at a predetermined temperature by controlling the current flowing through the induction coil and the temperature of the thermal fluid based on the roller surface temperature detection signal detected by the vessel. In this case, the roller surface temperature detection signal detected by the temperature detector is sent to a temperature control device arranged on the ground side, that is, the fixed side, via a rotary transformer installed in the journal of the roller. Electric power to the temperature detector and the like arranged on the rotating side is supplied from an AC power source arranged on the fixed side via a rotating transformer.
JP 2003-178862 A JP 2004-195888 A JP 2002-093567 A

  However, in the configuration in which the detection signal of the temperature detector is arranged on the rotating side and sent to the temperature control device on the fixed side via the rotating transformer, the transmission accuracy of the rotating transformer can be used even if a temperature detector with high detection accuracy is used. The variation of the roller surface temperature cannot be kept within ± 0.1 ° C. As a means for solving this drawback, the inventors have proposed that the detection signal of the temperature detector is wirelessly sent to the fixed-side temperature control device (Japanese Patent Application No. 2006-38786).

FIG. 4 is a circuit block diagram of the temperature detection device for a heat treatment roller according to this proposal. In FIG. 4, A indicates a rotation side of the roller, B indicates a fixed side such as a stator, and the rotation side A includes a temperature detector 1 made of platinum (Pt) 100Ω for detecting the roller surface temperature, and a signal conversion circuit. 2, the analog / digital converter 3, the microcomputer 4, the transmission circuit 5 and the transmission antenna 6 are disposed, and the reception antenna 7 and the reception circuit 8, the microcomputer 9 and the digital / analog converter 10 are disposed on the fixed side, The analog output of the digital / analog converter 10 is sent as a detection signal of the temperature detector 1 to a temperature control device (not shown).

The signal conversion circuit 2 supplies a constant current (1 mA) to the temperature detector 1, amplifies the drop voltage by 50 times, and outputs a change of 0 to 2 V corresponding to a change of 0 to 100 ° C. The analog / digital converter 3 samples the analog signal that is the output of the signal conversion circuit 2 every 100 mS, converts the output into 16 bits, converts it into a digital signal (numerical signal), and sends it to the microcomputer 4. The microcomputer 4 has an error of about 0.019 ° C. by linearizing the input digital signal because the temperature detector 1 has an error of about 0.3 ° C. instead of being linear. The 16-bit digital signal is digitally modulated into a 2.4 GHz current signal and sent to the transmission circuit 5. The transmission circuit 5 sends the digitally modulated current signal to the fixed side via the antenna 6. Send.

A signal transmitted from the rotation-side antenna 6 is received by the receiving circuit 8 via the fixed-side antenna 7, and the received signal is sent to the microcomputer 9. The microcomputer 9 reads a 16-bit digital current signal, sends the digital signal to the digital / analog converter 10, and sends the analog signal converted by the digital / analog converter 10 to a temperature control device (not shown).

In the temperature detection device for heat treatment roller configured in this way, the detection signal of the temperature detector is converted into a digital signal on the rotation side of the roller, and the signal converted into the digital signal is corrected by correcting the error due to the characteristics of the temperature detector. The digital signal transmitted on the fixed side is received and converted into an analog signal, and the analog signal is input to the temperature control device as the temperature detection signal of the temperature detector. A rotating transformer for sending to the fixed side is not required, and a highly accurate temperature detection signal can be obtained in combination with a signal in which an error due to the characteristics of the temperature detector is corrected.

However, the electric power supplied to the temperature detector, signal conversion, A / D converter, microcomputer, and transmission IC arranged on the rotation side roller is between the fixed side coil 11 and the rotation side coils 12-1 and 12-2. The coil 11 on the fixed side, which is supplied by magnetic coupling, is connected to an electric wire extending from an AC power source arranged away from the roller. For this reason, there are many electric wires to the roller, the periphery of the roller is complicated, and there is a problem that the roller cannot be disposed apart from devices such as a temperature controller on the fixed side.

  A problem to be solved by the present invention is a temperature detector installed within the thickness of a heat treatment roller, and a temperature control device arranged outside the roller by converting a detection signal of the temperature detector into a digital signal. In a heat treatment roller provided with a signal conversion transmission circuit installed on the roller for wireless transmission, a temperature detector installed on the roller on the rotation side and a signal conversion transmission circuit for supplying electric power from the fixed side to the roller This is to eliminate such a problem.

  The present invention provides a temperature detector installed within the thickness of the heat treatment roller, and the roller that converts the detection signal of the temperature detector into a digital signal and wirelessly transmits it to a temperature control device disposed outside the roller. A heat treatment roller provided with a signal conversion / transmission circuit installed in the main body, wherein a power supply device for supplying power to the temperature detector and the signal conversion / transmission circuit is provided in a journal of the roller.

  According to the present invention, the roller surface temperature detection signal is wirelessly transmitted to the temperature control device disposed outside the roller, and the power supply to the signal conversion transmission circuit installed in the roller is provided in the roller. The roller can be arranged at an arbitrary position independently without being influenced by the arrangement of the temperature detection power supply line.

  A temperature detector installed within the wall thickness of the heat treatment roller and a roller that converts the detection signal of the temperature detector into a digital signal and wirelessly transmits it to a temperature control device arranged outside the roller. In the heat treatment roller provided with a signal conversion transmission circuit, the roller itself is used for the purpose of reducing the wiring from the fixed side to the roller for supplying power to the temperature detector and the signal conversion transmission circuit installed on the rotation side roller. This was realized by providing a power supply device.

  FIG. 1 is a configuration diagram showing an outline of a heat treatment roller according to one embodiment, FIG. 2 is a cross-sectional view showing a configuration of a power supply unit of the heat treatment roller shown in FIG. 1, and FIG. 3 is for a roller according to an embodiment of the present invention. It is a block circuit diagram which shows the whole structure of a temperature detection apparatus. In FIG. 3, the same parts as those in the roller temperature detecting device of the preceding example shown in FIG. 4 are denoted by the same reference numerals, and the description of the overlapping parts is omitted.

In FIG. 1, 20 is a roller shell, 21 is an induction coil, 22 is an iron core, 23 is a support shaft, 24a and 24b are journals integrally fixed to both ends of the roller shell 20, and the induction coil 21 is a cylinder. It is wound around the iron core 22 and fixed to the support shaft 23. One end of the support shaft 23 is fixed to the machine base 25, and the other end is supported by the inner surface of the journal 24a via the bearing 25. The journals 24a and 24b are rotatably supported by the machine base 25 via bearings 27a and 27b, respectively, and rotate by rotation of a motor (not shown). The roller shell 20 is formed with a plurality of sealed chambers 20a for enclosing a gas-liquid two-phase heat medium and a hole 20b for inserting the temperature detector 1 of Pt (platinum) 100Ω.

The temperature detector 1 is connected to a signal conversion transmission circuit 29 (the signal conversion circuit 1, the A / D converter 3, the microcomputer 4, the transmission IC 5, and the antenna 6 shown in FIG. 3) fixed to the journal 24a. The detected temperature detection signal is wirelessly transmitted to the receiving circuit 30 (the antenna 7, the receiving IC 8, the microcomputer, and the D / A converter shown in FIG. 3) via the signal conversion transmitting circuit 29 and connected to the receiving circuit 30. 31. The temperature control device 31 compares the transmitted temperature detection signal with the roller surface temperature setting value, and adjusts the current flowing through the induction coil 21 by the power regulator 32 formed of a thyristor unit according to the deviation.

In the present embodiment according to the present invention, a power supply device 33 comprising a generator, an overcharge protection circuit and a lithium ion battery (may be an electric double layer capacitor) is installed inside the journal 24a. Power is supplied to the temperature detector 1 and the signal conversion transmission circuit 29 provided on the rotation side (roller).

Specifically, the power supply device 33 is configured as shown in FIG. That is, in FIG. 2, 34 is a generator case fixed to the journal 24a and rotates with the rotation of the journal 24a, 35 is a gear box fixed to the end of the support shaft 23, and 36 is fixed to the journal 24a. A gear 37 that rotates with rotation is an overcharge protection circuit and a lithium ion battery. The rotation of the gear 36, that is, the rotation of the journal 24 a is transmitted to the gear in the gear box 35, and the rotation at a higher speed than the rotation of the journal 24 a is transmitted to the output shaft 38. The output shaft 38 penetrates the generator case 34, and a commutator (slip ring) 34c is fixed to the end portion. A magnet 34a is fixed to the inner surface of the generator case 34, and a coil (tripolar) 34b is fixed to the output shaft 38 at a position facing the magnet 34a. The end of the coil (tripolar) 34b is a commutator (slip ring). ) 34c. That is, a voltage is induced in the coil (tripolar) 34b due to the difference between the rotational speed of the magnet 34a and the rotational speed of the coil (tripolar) 34b.

A brush 34d is fixed to the end of the generator case 34, and the brush 34d contacts the commutator 34c. That is, the alternating voltage induced in the coil (tripolar) 34b is converted into direct current by the commutator 34c and the brush 34d and sent to the overcharge protection circuit and the lithium ion battery 37 to charge the lithium ion battery. The power supply to the temperature detector 1 and the signal conversion transmission circuit 29 provided on the rotation side is supplied from the overcharge protection circuit and the lithium ion battery 37. When the roller is stopped, the generator does not generate power, so the lithium Supplied from an ion battery. Reference numeral 39 denotes a power supply line. A geared motor may be used instead of the combination of the generator and the gear box.

Although the above description uses a generator as a power supply device, the power source is not limited to the generator, and may be a solar cell, for example. The heat treatment roller of the embodiment uses an induction heat generation mechanism as a heat source, but the heat source is not limited to the induction heat generation mechanism, and may be a heat transfer fluid.

It is a block diagram which shows the outline of the roller for heat processing which concerns on the Example of this invention. It is sectional drawing which shows a structure of an example of the power supply part of the roller for heat processing shown in FIG. 1 is a block circuit diagram showing an overall configuration of a roller temperature detecting device according to an embodiment of the present invention. It is a block circuit diagram which shows the whole structure of the conventional temperature detection apparatus for rollers.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temperature detector 20 Roller shell 20b Temperature detector insertion hole 21 Induction coil 22 Iron core 23 Support shaft 24a, 24b Journal 25 Machine base 29 Signal conversion transmission circuit 30 Reception circuit 31 Temperature control device 32 Power regulator 33 Power supply device 34 Generator Case 34a Magnet 34b Coil 34c Commutator 34d Brush 35 Gear box 36 Gear 37 Overcharge protection circuit and lithium ion battery 38 Output shaft

Claims (2)

A temperature detector installed within the wall thickness of the heat treatment roller and a roller that converts the detection signal of the temperature detector into a digital signal and wirelessly transmits it to a temperature control device arranged outside the roller. A heat treatment roller provided with a signal conversion transmission circuit, wherein a power supply device for supplying power to the temperature detector and the signal conversion transmission circuit is provided in a journal of the roller. 2. The heat treatment roller with a power supply device according to claim 1, wherein the power supply device includes a generator that generates power by rotating a roller and a storage device that stores the power generated by the generator.

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