CN-122028235-A - Induction heating roller device

Abstract

An induction heat generating roller device for transmitting a detection signal of a temperature sensor provided to a roller to a stationary side, wherein the stability of light transmission is improved while suppressing power consumption, is provided with a light transmitting unit (11) provided on the rotating side and outputting light corresponding to the detection signal, a light receiving unit (12) provided on the stationary side and receiving light from the light transmitting unit, a resolver (13) for electromagnetically coupling the stationary side coil (131) with the rotating side coil (132) and supplying power to the light transmitting unit in a noncontact manner, and an alternating voltage adjusting unit (14) for adjusting the alternating voltage supplied to the stationary side coil, the stationary side coil and the rotating side coil being in the shape of a loop wound around a rotation shaft (2C) of the roller (2), the alternating voltage adjusting unit (14) being provided opposite to each other with an interval in the rotation shaft direction of the roller, and adjusting the frequency or amplitude of the alternating voltage and supplying a reference voltage required for the operation of the light transmitting unit (11) to the rotating side coil.

Inventors

• The prosperous justice of Kimura

Assignees

• 特电株式会社

Dates

Publication Date

20260512

Application Date

20250922

Priority Date

20241111

Claims (5)

1. 1. An induction heat roller device, comprising: A hollow roller rotatably provided; An induction heating mechanism disposed in the hollow of the roller; A temperature sensor provided to the roller for detecting the temperature of the roller, and A signal transmission device for transmitting the detection signal of the temperature sensor to the temperature control device at the stationary side in a non-contact manner, The signal transmission device has: a light transmitting unit provided on the rotation side and configured to output light corresponding to the detection signal; A light receiving unit provided on the stationary side and configured to receive light from the light transmitting unit; A rotary transformer for electromagnetically coupling the stationary side coil and the rotary side coil to supply power to the light transmitting unit in a noncontact manner, and An alternating-current voltage adjusting unit for adjusting the alternating-current voltage supplied to the stationary side coil, The stationary side coil and the rotating side coil are formed in a ring shape wound around the rotation axis of the roller, are disposed opposite to each other with a gap therebetween in the rotation axis direction of the roller, The ac voltage adjusting unit adjusts the frequency or amplitude of the ac voltage, and supplies a reference voltage required for the operation of the optical transmitting unit to the rotating-side coil.
2. 2. The induction heat roller device according to claim 1, wherein, The light transmitting portion and the light receiving portion are disposed along the rotation axis of the roller with the resolver interposed therebetween, and transmit/receive light through the center openings of the stationary side coil and the rotation side coil.
3. 3. The induction heat roller device according to claim 2, wherein, The light transmitting section has a light emitting element arranged on a rotation axis of the roller, The light receiving section has a receiving element arranged on a rotation axis of the roller.
4. 4. The induction heat roller device according to claim 2, wherein, The resolver further includes: A stationary-side resin sealing portion for sealing the stationary-side coil with an insulating resin, and A rotating-side resin sealing portion for sealing the rotating-side coil with an insulating resin, The stationary-side resin sealing portion has a through portion corresponding to a central opening portion of the stationary-side coil, The rotating side resin sealing portion has a through portion corresponding to a central opening portion of the rotating side coil, The light transmitting portion and the light receiving portion transmit/receive light through the penetrating portions of the stationary side resin sealing portion and the rotating side resin sealing portion.
5. 5. The induction heat roller device according to claim 4, wherein, The stationary-side resin sealing portion seals the stationary-side coil together with a plurality of ferrite cores arranged radially with respect to a winding center of the stationary-side coil, The rotation-side resin sealing portion seals the rotation-side coil together with a plurality of ferrite cores arranged radially with respect to a winding center of the rotation-side coil.

Description

Induction heating roller device Technical Field The present invention relates to an induction heat roller device. Background Conventionally, as shown in patent document 1, in order to control the heat generation temperature of a roller in an induction heat generation roller device, it is considered to provide a temperature sensor inside the roller, and a detection signal of the temperature sensor is transmitted to a temperature control device provided on a stationary side in a noncontact manner by a signal transmission device. The signal transmission device includes an optical transmitter provided on a rotating side and outputting light corresponding to a detection signal, an optical receiver provided on a stationary side and receiving light from the optical transmitter, and a resolver in which a stationary side coil is electromagnetically coupled to a rotating side coil and power is supplied to the optical transmitter in a noncontact manner. Here, the stationary side coil and the rotating side coil of the resolver are cylindrical wound along the rotation axis of the roller, and are disposed so as to face each other in the radial direction. Prior art literature Technical literature Patent document 1 Japanese patent application laid-open No. 2022-55545 Disclosure of Invention Problems to be solved by the invention In the case of a structure in which the stationary-side coil and the rotating-side coil are disposed to face each other in the radial direction as in the conventional case, the gap distance between the stationary-side coil and the rotating-side coil is less likely to change, and the power supply to the light transmitting unit can be stably performed. On the other hand, in the case of a structure in which the stationary-side coil and the rotating-side coil are disposed to face each other in the rotation axis direction (axial direction) of the roller, the gap distance between the stationary-side coil and the rotating-side coil varies due to an assembly error of the signal transmission device. In addition, when the induction heat generating roller device is operated, the gap distance between the stationary side coil and the rotating side coil changes due to the difference in thermal expansion of the respective members such as the roller. As described above, if the gap distance between the stationary side coil and the rotating side coil changes, the voltage required for operating the light transmitting unit may not be supplied to the rotating side coil. Here, it is also considered that, regardless of the gap distance between the rotating side coil and the stationary side coil, an ac voltage large enough to supply a voltage necessary for operating the light transmitting unit is supplied to the stationary side coil, but power consumption is wasted. The present invention has been made to solve the above-described problems, and an object of the present invention is to improve the stability of light transmission while suppressing power consumption in a signal transmission device that transmits a detection signal of a temperature sensor provided in a roller to a stationary side. Means for solving the problems Specifically, the induction heating roller device of the present invention is characterized by comprising a hollow roller rotatably provided therein, an induction heating mechanism disposed in the hollow of the roller, a temperature sensor provided in the roller to detect the temperature of the roller, and a signal transmission device configured to transmit a detection signal of the temperature sensor to a temperature control device on the stationary side in a noncontact manner, the signal transmission device including a light transmitting unit provided on the rotating side to output light corresponding to the detection signal, a light receiving unit provided on the stationary side to receive light from the light transmitting unit, a resolver configured to electromagnetically couple the stationary side coil and the rotating side coil to supply power to the light transmitting unit in a noncontact manner, and an alternating current voltage adjusting unit configured to adjust the alternating current voltage supplied to the stationary side coil, the stationary side coil and the rotating side coil being provided in a loop shape around the rotation axis of the roller so as to be opposed to each other at intervals in the rotation axis direction of the roller, the alternating current voltage adjusting unit being configured to adjust the frequency of the alternating current voltage or the rotation side coil, and the rotating side coil being configured to adjust the frequency of the alternating current voltage or the amplitude of the alternating current voltage and the reference voltage being supplied to the required for the operation. In such a device, in a configuration in which the stationary-side coil and the rotating-side coil are disposed so as to face each other in the rotation axis direction of the roller