JP2023059814A - Induction heating roller device - Google Patents

Abstract

To increase a rotation speed of a roller body, miniaturize a cantilevered induction heating roller device, and obtain torque and capacity of a motor required for the cantilevered induction heating roller device.SOLUTION: An induction heating roller device includes a fixed shaft cantilevered on a machine base, a cylindrical roller body rotatably supported by the fixed shaft via a bearing, an induction heating mechanism that is provided inside the roller body and causes the roller body to generate heat by induction, and an axial gap motor installed between the machine base and the roller body to rotate the roller body with respect to the fixed shaft.SELECTED DRAWING: Figure 1

Description

The present invention relates to an induction heating roller device.

In the manufacturing process of synthetic fibers such as nylon and polyester, a straight drawing process is performed in which properties such as tensile strength and elastic modulus are improved by heating after spinning and stretching in the length direction to adjust molecular orientation. .

In this direct drawing step, a plurality of cantilevered induction heating roller devices are used to heat the synthetic fibers and to draw the synthetic fibers by the difference in rotation speed of each induction heating roller device.

This cantilevered induction heating roller device, as shown in Patent Document 1, consists of a roller body having a shaft fitting portion at the center of the bottom, and a cylindrical iron core and an induction coil arranged inside the roller body. The roller body is supported in a cantilever manner by fitting and connecting the tip of the rotating shaft of the motor to the shaft fitting portion of the roller body so that the roller body is rotated by the motor. It is

Specifically, in the induction heating roller device described above, a cylindrical portion that supports the magnetic flux generating mechanism is provided inside the roller body, and the rotation shaft of the motor is supported on the inner peripheral surface of the cylindrical portion by rolling bearings. there is

However, in a configuration in which the rotating shaft of the motor is supported by rolling bearings, the critical speed of the rotating shaft corresponding to the resonance frequency determined by the rigidity determined by the mass and material of the members constituting the rotating system is Also, the roller body cannot be rotated at high speed.

As a countermeasure against this, it is possible to increase the rigidity of the rotating shaft and increase the critical speed by increasing the size of the rolling bearing and the outer diameter of the rotating shaft. , the allowable maximum rotational speed of the bearing itself is lowered. As described above, the conflict between the rigidity of the rotating shaft and the size of the rolling bearing determines the critical speed, which in turn determines the maximum rotational speed of the roller body.

Further, as shown in Patent Document 2, a motor stator is fitted and fixed to the inner diameter side of the hot roller rotor and the heater coil, and the motor rotor and the motor rotor are arranged facing the motor stator. Arrangements with a fixed shaft are also contemplated. The shaft is connected to the hot roller rotor. Also, the shaft is rotatably supported via bearings on a cover connected to a hot roller boss portion provided with a heater coil.

With this configuration, the area required to install the induction heating roller device can be reduced, but the configuration is still subject to the critical speed of the shaft. is limited to the inner diameter of the heater coil, it is difficult to produce a motor that exhibits the required rotational torque and capacity. On the other hand, increasing the outer diameter of the hot roller rotor in order to increase the inner diameter of the heater coil results in an increase in the weight and moment of inertia of the hot roller rotor, necessitating a larger motor. occurs.

JP 2009-163968 A JP-A-6-111920

SUMMARY OF THE INVENTION Accordingly, the present invention has been devised to solve the above-mentioned problems. The main task is to obtain the torque and capacity of the motor required for the device.

That is, the induction heating roller device according to the present invention comprises a fixed shaft that is cantilever supported on a machine base, a cylindrical roller body that is rotatably supported by the fixed shaft via a bearing, and a and an induction heating mechanism provided between the machine base and the roller body for causing the roller body to generate heat by induction; and an axial gap motor provided between the machine base and the roller body for rotating the roller body about the fixed shaft. do.

With such a structure, since the structure does not use a rotating shaft, there is no restriction on the critical speed, and it becomes easy to increase the rotation speed of the roller body. In addition, since the axial gap motor is used, the cantilever type induction heating roller device can be made smaller than the conventional one using the radial gap motor, and the area required for installation can be greatly reduced. Space can be saved. Furthermore, the rotor and stator of the axial gap motor can be made as large as the outer diameter of the roller body, and the torque and capacity of the motor required for the cantilevered induction heating roller device can be obtained. Moreover, since the axial gap motor is provided outside the roller body, the axial dimension of the induction heating mechanism provided inside the roller body can be increased as much as possible.

As a specific embodiment of the axial gap motor, the axial gap motor is provided on the end surface of the roller main body facing the machine base side, and a plurality of axial gap motors are arranged around the rotation axis of the roller main body. and a disk having a plurality of magnetic poles provided on the machine base or the fixed shaft so as to face the machine base side end face and facing the rotor in the rotation axis direction of the roller body. It is conceivable to have a shaped stator.

In order to prevent damage to the bearing by cooling the bearing, it is desirable that a coolant flow path through which coolant flows is formed inside the fixed shaft.

In order to cool not only the bearing but also the stator, it is desirable that the coolant flow path cools the bearing as well as the stator.

As a specific embodiment of the fixed shaft, the fixed shaft includes a support shaft portion that supports the roller body, and a fixed flange portion that is formed at the base end portion of the support shaft portion and fixed to the machine base. and the stator is provided on the fixed flange portion.

As a specific embodiment for cooling the bearing and the stator, a bearing cooling passage for cooling the bearing is formed inside the support shaft portion, and the stator is provided inside the fixed flange portion. It is desirable that a stator cooling passage for cooling is formed.

In order to lubricate and cool the bearings as well as cool the axial gap motor, the coolant passages are for flowing a coolant containing lubricating oil, are opened on the outer peripheral surface of the fixed shaft, and supply mist-like coolant. It is desirable to supply the bearing and the axial gap motor.

In order to reduce the heat transfer from the induction-heated roller body to the rotor and prevent the rotor from being excessively heated, a heat insulating layer is formed between the end surface of the roller body on the machine base side and the rotor. It is desirable that

As a specific embodiment for forming the heat insulating layer, it is desirable that the rotor is fixed to the end face on the machine base side by an annular fixing member, and that the heat insulating layer is formed by the fixing member. . By forming the heat insulating layer with the fixing member in this manner, the structure of the device for heat insulation can be simplified.

It is preferable that the fixing member is formed with a groove that is open to the entire circumference of the outer peripheral surface, and that the heat insulating layer is formed by the groove. With this configuration, the rear side of the rotor can be positively air-cooled.

A coolant channel through which a coolant flows is formed inside the fixed shaft, the coolant channel is open to the outer peripheral surface of the fixed shaft, and supplies the coolant to the axial gap motor, It is preferable that an internal flow path through which the coolant flows from the radially inner side to the radially outer side is formed inside the fixed member. With this configuration, since the fixed member has an internal flow path through which the coolant flows, the heat insulation performance of the fixed member can be improved, and the rotor can be positively cooled.

A coolant channel through which a coolant flows is formed inside the fixed shaft, the coolant channel is open to the outer peripheral surface of the fixed shaft, and supplies the coolant to the axial gap motor, It is preferable that a channel through which the coolant flows from the radially inner side to the radially outer side is formed between the permanent magnets adjacent to each other in the rotor. With this configuration, since the flow path through which the coolant flows is formed between the permanent magnets adjacent to each other in the rotor, the permanent magnets of the rotor can be positively cooled.

According to the present invention configured as described above, not only can the rotation speed of the roller body be increased, but also the size of the induction heating roller device can be reduced, and the torque and capacity of the motor required for the induction heating roller device can be obtained.

1 is a cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to an embodiment of the present invention; FIG. FIG. 10 is a cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to a modified embodiment. FIG. 10 is a cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to a modified embodiment. FIG. 10 is a cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to a modified embodiment. (a) Cross-sectional view along the (a1) axial direction of the fixing member in Configuration Example 1, (a2) Cross-sectional view orthogonal to the axial direction, and (b) Cross-sectional view along the (b1) axial direction in Configuration Example 2 , (b2) are cross-sectional views perpendicular to the axial direction. FIG. 10 is a cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to a modified embodiment. FIG. 4A is a partial cross-sectional view schematically showing the configuration of a cantilevered induction heating roller device according to a modified embodiment; FIG. 4B is a perspective view of a rotor; and FIG.

<One embodiment of the present invention>
An embodiment of a cantilevered induction heating roller device 100 according to the present invention will be described below with reference to the drawings.

This cantilever type induction heating roller device 100 is used in a heat treatment process for sheet materials such as plastic films, paper, cloth, non-woven fabrics, synthetic fibers, metal foils, web materials, and continuous materials such as wire (thread) materials. It is something that can be done.

As shown in FIG. 1, the cantilevered induction heating roller device 100 of this embodiment includes a fixed shaft 2 that is cantilevered on a machine base 20, and a fixed shaft 2 that is rotatable via bearings 3 and 4. a supported cylindrical roller body 5; an induction heating mechanism 6 provided inside the roller body 5 to induce heat generation in the roller body 5; and an axial gap motor 7 that rotates with respect to the fixed shaft 2 .

<Fixed shaft 2>
The fixed shaft 2 is cantilever-supported by fixing one end to a fixed machine base 20 . The fixed shaft 2 is formed at a substantially cylindrical support shaft portion 21 that rotatably supports the roller body 5 via bearings 3 and 4, and at the base end portion of the support shaft portion 21, and is fixed to the machine base 20. and a fixed flange portion 22 .

The bearings 3 and 4 are rolling bearings, and materials such as chrome bearing steel, stainless steel, and ceramics can be appropriately selected according to the temperature of the bearing portion. It can be appropriately selected from lubricants and the like in accordance with the temperature of the bearing portion. It should be noted that the rolling bearing may be replaced with a non-contact magnetic bearing.

<Roller body 5>
The roller main body 5 includes a cylindrical portion 51 having a cylindrical shape, a first disc portion 52 provided so as to close an opening at one end in the axial direction of the cylindrical portion 51, and an opening at the other end in the axial direction of the cylindrical portion 51. and a second disk portion 53 provided so as to block. A plurality of jacket chambers 5 x are formed along the axial direction within the thickness of the cylindrical portion 51 . A gas-liquid two-phase heat medium is enclosed in the jacket chamber 5x.

Insertion holes 52h and 53h through which the fixed shaft 2 is inserted are formed in the first disc portion 52 and the second disc portion 53 of the roller body 5 . An outer ring rotating rolling bearing 3 is provided between the insertion hole 52h of the first disk portion 52 and the fixed shaft 2, and an outer ring rotation rolling bearing 3 is provided between the insertion hole 53h of the second disk portion 53 and the fixed shaft 2. of rolling bearings 4 are provided. One of the first disc portion 52 and the second disc portion 53 may be integrally formed with the cylindrical portion 51 .

In addition, a temperature sensor 8 for detecting the temperature of the cylindrical portion 51 is provided within the thickness of the cylindrical portion 51 of the roller body 5 . The temperature sensor 8 is connected to a detection signal transmission section 9 provided in the roller body 5, and the detection signal of the temperature sensor 8 is transmitted to an external temperature control device (not shown) by the detection signal transmission section 9. be done.

This temperature control device controls a power supply circuit (not shown), which will be described later, to control the temperature of the roller body 5 . The detection signal transmission unit 9 may use, for example, a short-range wireless communication system, or may be of an electromagnetic induction type or an optical type having a transmission unit 9a and a reception unit 9b. The detection signal transmission unit 9 of FIG. 1 is provided with a transmission unit 9 a on the second disc portion 53 and a reception unit 9 b on the fixed flange portion 22 .

<Induction heating mechanism 6>
The induction heating mechanism 6 is provided inside the roller body 5 and includes a cylindrical iron core 61 and an induction coil 62 wound around the outer peripheral surface of the cylindrical iron core 61 . The fixed shaft 2 is inserted through a cylindrical iron core 61 of the induction heating mechanism 6 , and the induction heating mechanism 6 is attached and fixed to the fixed shaft 2 by a mounting member 10 .

A lead wire (not shown) connected to the induction coil 62 is connected to a power supply circuit (not shown) for applying AC voltage of commercial frequency (50 Hz or 60 Hz).

The induction heating mechanism 6 generates an alternating magnetic flux when an alternating voltage is applied to the induction coil 62 , and the alternating magnetic flux passes through the side peripheral wall (cylindrical portion 51 ) of the roller body 5 . Due to this passage, an induced current is generated in the cylindrical portion 51 of the roller body 5, and the induced current causes the cylindrical portion 51 of the roller body 5 to generate Joule heat.

<Axial gap motor 7>
The axial gap motor 7 rotates the roller body 5 with respect to the fixed shaft 2 and is provided outside the roller body 5 on the side of the machine base 20 .

Specifically, the axial gap motor 7 includes a disc-shaped rotor (rotor) 71 fixed to the roller body 5 and a disc-shaped stator (stator) 72 fixed to the fixed flange portion 22 of the fixed shaft 2 . have.

The rotor 71 has a plurality of permanent magnets arranged at regular intervals around the rotation axis of the roller body 5 . The rotor 71 of this embodiment is fixed to the machine base side end surface 5a of the roller body 5 in the rotation axis direction. The machine base side end face 5a of the present embodiment is constituted by the outer end face of the second disk portion 53 of the roller body 5. As shown in FIG.

Here, between the end surface 5a of the roller main body 5 on the side of the machine base and the rear surface of the rotor 71 (the surface opposite to the machine base 20), a heat insulating layer S1 is formed over the entire circumferential direction around the rotation axis. ing. Specifically, the rotor 71 is fixed to the machine base side end face 5a by an annular fixing member 11, and the fixing member 11 forms a heat insulating layer S1. Specifically, the fixing member 11 is formed with a groove 11a that opens along the entire circumference of the outer peripheral surface. The groove 11 a is formed inside the half position of the rotor 71 in the radial direction of the fixed member 11 . With this configuration, the fixing member 11 is configured to have a substantially U-shaped cross section. A heat insulating layer S1 is formed by the concave groove 11a. The thick portion itself of the fixing member 11 also functions as a heat insulating layer.

The stator 72 has a plurality of magnetic poles facing the rotor 71 in the rotation axis direction of the roller body 5 . The plurality of magnetic poles are also arranged at regular intervals around the rotation axis of the roller body 5 in the same manner as the plurality of permanent magnets. The stator 72 of the present embodiment is provided on the facing surface 2a that faces the machine base side end surface 5a of the roller body 5 . The facing surface 2x is formed by a surface of the fixed flange portion 22 of the fixed shaft 2 facing the base end surface 5a.

In this axial gap motor 7, by supplying AC power to the stator 72, rotational torque is generated between the rotor 71 and the stator 72, and the roller body 5 rotates at a predetermined number of revolutions.

<Cooling Mechanism 12 for Bearings 3, 4 and Axial Gap Motor 7>
Further, the cantilevered induction heating roller device 100 of this embodiment includes a cooling mechanism 12 for cooling the bearings 3 and 4 and the axial gap motor 7 .

The cooling mechanism 12 includes a coolant channel 121 formed inside the fixed shaft 2 through which coolant flows, and a coolant supply source (not shown) such as a pump that supplies coolant to the coolant channel 121 . As the coolant, for example, water or air can be used.

The coolant flow path 121 is formed to cool the bearings 3 and 4 and the stator 72 of the axial gap motor 7 . Specifically, the coolant channel 121 is formed inside the support shaft portion 21 and is formed inside the bearing cooling channel 121 a for cooling the bearings 3 and 4 and inside the fixed flange portion 22 to cool the stator 72 . It has a stator cooling passage 121b for cooling.

The bearing cooling flow path 121a is a reciprocating path that communicates with the inlet port P1 and the outlet port P2 provided at the base end of the fixed shaft 2 and is formed inside the support shaft portion 21 along the axial direction. The bearing cooling passage 121a extends to the bearing 3 on the free end side in the axial direction of the support shaft portion 21 or a position in the vicinity thereof.

The stator cooling flow path 121 b has an annular flow path formed along the circumferential direction of the stator 72 in a portion facing the stator 72 inside the fixed flange portion 22 . The stator cooling channel 121b of this embodiment is branched from the bearing cooling channel 121a and communicates with the introduction port P1 and the outlet port P2. The stator cooling channel 121b may be formed inside the fixed shaft 2 independently of the bearing cooling channel 121a.

<Effects of this embodiment>
According to the induction heating roller device 100 configured in this way, since the configuration does not use a rotating shaft, there is no restriction on the critical speed, and it becomes easy to increase the rotation speed of the roller body 5 . In addition, since the axial gap motor 7 is used, the cantilever type induction heating roller device 100 can be made smaller than the one using the conventional radial gap motor, and the area required for installation can be greatly reduced. space can be saved. Further, the rotor 71 and the stator 72 of the axial gap motor 7 can be enlarged to the same size as the outer diameter of the roller body 5, so that the torque and capacity of the motor required for the cantilever induction heating roller device 100 can be obtained. can be done. Moreover, since the axial gap motor 7 is provided outside the roller body 5, the axial dimension of the induction heating mechanism 6 provided inside the roller body 5 can be increased as much as possible.

The groove 11a is formed in the fixing member 11 for fixing the rotor 71, and the heat insulating layer S1 is formed by the groove 11a. Excessive heating of the rotor 71 can be prevented. Also, the rear side of the rotor 71 can be positively air-cooled.

<Other embodiments>
In addition, the present invention is not limited to the above-described embodiments, and the following aspects may be adopted.

For example, in addition to the configuration in which the stator 72 of the axial gap motor 7 of the above embodiment is provided on the fixed flange portion 22 of the fixed shaft 2, as shown in FIG. The stator 72 may be provided on a separate member (not shown).

Alternatively, the cooling mechanism 12 may be configured to directly supply the coolant containing the lubricating oil to the bearings 3 and 4 and the axial gap motor 7 . In this case, as shown in FIG. 3, the coolant flow path 121 is for flowing a coolant containing lubricating oil, and is opened to the outer peripheral surface of the fixed shaft 2 (support shaft portion 21). It is conceivable to adopt a configuration in which the refrigerant is led out in the form of a shape. Here, the nozzle-shaped opening 121x of the coolant channel 121 can lead out a mist-like coolant. Moreover, the opening 121x is formed so as to face the bearings 3 and 4 . Then, the mist-like coolant drawn out from the opening 121 x of the coolant flow path 121 is sprayed onto the bearings 3 and 4 . The mist-like coolant sprayed onto the bearing 4 on the machine base side passes between the rotor 71 and the stator 72 of the axial gap motor 7 to cool them, and then is released to the outside.

Furthermore, as shown in FIG. 4 , a coolant channel 121 through which coolant flows is formed inside the fixed shaft 2 . It may be configured to open to the axial gap motor 7 and supply a coolant (for example, air) to the axial gap motor 7 . Here, the fixed member 11 that fixes the rotor 71 to the roller body 5 serves as the heat insulating layer S1, and an internal flow path 11R is formed inside the fixed member 11 through which the coolant flows from the radially inner side to the radially outer side. . In addition, the coolant channel 121 is open on the outer peripheral surface of the fixed shaft 2 so as to face the inner peripheral surface of the fixed member 11 in the radial direction. With such a configuration, the coolant supplied from the coolant flow path 121 cools the bearing 4 on the machine base side, and then passes through the internal flow path 11R due to the centrifugal force accompanying the rotation together with the supply pressure of the coolant. The rotor 71 is thereby cooled. Also, part of the coolant passes between the rotor 71 and the stator 72 to cool them, and then is released to the outside.

Here, FIG. 5 shows a configuration example of the fixing member 11 having the internal flow path 11R. In configuration example 1, as shown in FIG. 5( a ), the fixing member 11 is composed of a single annular plate member. 11 R of internal flow paths are formed toward it. The internal channel 11R may be a linear channel or a curved channel. Further, in configuration example 2, as shown in FIG. 5B, the fixing member 11 is configured by stacking two annular plate members 11a and 11b via a plurality of spacer members 11c. , an internal flow path 11R is formed between the plate members 11a and 11b by a plurality of spacer members 11c. In this configuration, the rotor 71 is fixed to one plate member 11 a and the other plate member 11 b is fixed to the roller body 2 .

Further, as shown in FIG. 6, the fixing member 11 for fixing the rotor 71 to the roller main body 5 may have a concave groove 11a that opens along the entire circumference of the inner peripheral surface. A heat insulating layer S1 is formed by the concave groove 11a. A coolant channel 121 through which a coolant flows is formed inside the fixed shaft 2 . The coolant channel 121 opens on the outer peripheral surface of the fixed shaft 2 toward the machine base side of the bearing 4 , and the coolant (for example, Air) may be supplied to the axial gap motor 7 . Here, one or a plurality of through holes 11h are formed in the bottom wall portion (peripheral wall portion) of the groove 11a of the fixing member 11. As shown in FIG. An internal flow path 11R is formed by the concave groove 11a and the through hole 11h. In addition, the coolant channel 121 is open on the outer circumferential surface of the fixed shaft 2 so as to face the groove 11a of the fixed member 11 in the radial direction. With such a configuration, the coolant supplied from the coolant flow path 121 cools the bearing 4 on the machine base side, and then flows into the concave groove 11a due to the centrifugal force caused by the rotation together with the coolant supply pressure, and the through hole 11h. released to the outside. The rotor 71 is thereby cooled. Also, part of the coolant passes between the rotor 71 and the stator 72 to cool them, and then is released to the outside.

Furthermore, as shown in FIG. 7, a flow path 71R may be formed between the permanent magnets 11m adjacent to each other in the rotor 71 so that the coolant flows from the radially inner side to the radially outer side. Here, the rotor 71 has an annular magnetic base member 711 and permanent magnets 71m intermittently and alternately provided to the base member 711 . Note that the base member 711 may function as the heat insulating layer S1. A fixing member 11 may be provided between the base member 711 and the roller body 5 . A coolant channel 121 through which a coolant flows is formed inside the fixed shaft 2 . The coolant channel 121 opens on the outer peripheral surface of the fixed shaft 2 toward the machine base side of the bearing 4 . Air) may be supplied to the axial gap motor 7 . Here, the coolant channel 121 is opened on the outer peripheral surface of the fixed shaft 2 so as to face the permanent magnet 71m in the radial direction. With such a configuration, the coolant supplied from the coolant flow path 121 cools the bearing 4 on the machine base side, and then moves the flow path 71R between the permanent magnets 71m due to the centrifugal force caused by the rotation together with the supply pressure of the coolant. pass. Also, the coolant passes between the rotor 71 and the stator 72 . The rotor 71 is thereby cooled.

In each embodiment described above, a magnetic shield portion may be provided between the axial gap motor 7 and the induction heating mechanism 6 . In FIGS. 1 and 2, the magnetic shielding portion may be formed by imparting the magnetic shielding function to the second disk portion 53 or the fixing member 11, or by providing a magnetic shielding member separately. With this configuration, it is possible to prevent mutual magnetic interference between the axial gap motor 7 and the induction heating mechanism 6 which are arranged in series. In addition, it is conceivable to use an involute core (a core in which magnetic steel plates having a cross section of approximately involute shape are laminated in a cylindrical shape) with low magnetic resistance to prevent the core from generating leakage magnetic flux.

When the straight drawing process is performed using a plurality of the above-mentioned induction heating roller devices, a mutual inclination angle (Nelson angle) is given to allow a predetermined yarn path to run stably between the plurality of induction heating roller devices. For this reason, the fixed shaft 2 may be provided with a rotatable portion.

In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications are possible without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100... Cantilever type induction heating roller apparatus 20... Machine base 2... Fixed shaft 21... Support shaft part 22... Fixed flange parts 3 and 4... Bearing 5... Roller Main body 5x Machine base side end face 6 Induction heating mechanism 7 Axial gap motor 71 Rotor 72 Stator 11 Fixed member 11a Groove S1 Heat insulation Layer 121 Coolant channel 121a Bearing cooling channel 121b Stator cooling channel 11R Internal channel 71R Channel

Claims (12)

a fixed shaft cantilevered on the machine base;
a cylindrical roller body rotatably supported by the fixed shaft via a bearing;
an induction heating mechanism that is provided inside the roller body and causes the roller body to generate heat by induction;
A cantilever type induction heating roller device comprising an axial gap motor provided between the machine base and the roller body for rotating the roller body with respect to the fixed shaft. The axial gap motor is
a disc-shaped rotor having a plurality of permanent magnets provided on the end face of the roller body facing the machine base side and arranged around the rotation axis of the roller body;
2. The apparatus according to claim 1, further comprising a disc-shaped stator having a plurality of magnetic poles provided on the machine base or the fixed shaft so as to face the machine base side end surface and facing the rotor in the rotation axis direction of the roller body. A cantilevered induction heating roller apparatus as described. 3. The cantilevered induction heating roller device according to claim 1, wherein a coolant channel through which a coolant flows is formed inside said fixed shaft. 4. The cantilevered induction heating roller device according to claim 3, wherein the coolant flow path cools the bearing as well as the stator. The fixed shaft is
a support shaft portion that supports the roller body;
a fixed flange portion formed at the base end portion of the support shaft portion and fixed to the machine base;
3. The cantilevered induction heating roller device according to claim 2, wherein the stator is provided on the fixed flange portion. A bearing cooling passage for cooling the bearing is formed inside the support shaft,
6. The cantilevered induction heating roller device according to claim 5, wherein a stator cooling passage for cooling the stator is formed inside the fixed flange portion. 3. The coolant channel is for flowing a coolant containing lubricating oil, and is open to the outer peripheral surface of the fixed shaft to supply a mist-like coolant to the bearing and the axial gap motor. 5. The cantilevered induction heating roller device according to 4. 3. The cantilevered induction heating roller device according to claim 2, wherein a heat insulating layer is formed between the end surface of the roller body on the machine base side and the rotor. The rotor is fixed to the machine base side end face by an annular fixing member,
9. The cantilevered induction heating roller device according to claim 8, wherein said heat insulating layer is formed by said fixed member. The fixing member is formed with a groove that is open to the entire circumference of the outer peripheral surface,
10. The cantilevered induction heating roller device according to claim 9, wherein the heat insulating layer is formed by the groove. A coolant channel through which a coolant flows is formed inside the fixed shaft,
the coolant channel is open to the outer circumferential surface of the fixed shaft and supplies the coolant to the axial gap motor;
11. The cantilevered induction heating roller device according to claim 9, wherein an internal flow path through which the coolant flows from the radially inner side to the radially outer side is formed inside the fixed member. A coolant channel through which a coolant flows is formed inside the fixed shaft,
the coolant channel is open to the outer circumferential surface of the fixed shaft and supplies the coolant to the axial gap motor;
11. The cantilevered induction heating roller according to claim 9, wherein a channel is formed between the permanent magnets adjacent to each other in the rotor so that the coolant flows from the radially inner side to the radially outer side. Device.

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