JP2018022585A - Induction heating roller device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase supporting force of a stationary member for a roller body while suppressing various trouble resulting from that a bearing is provided between the roller body and stationary member in an induction heating roller device.SOLUTION: An induction heating roller device comprises: a hollow roller body 3 which is supported rotatably; a stationary member 3 which has at least an induction coil 312, and is arranged in a stationary state in a hollow of a roller body 2; a rotary-side permanent magnet and a stationary-side permanent magnet which are provided to the roller body 2 and stationary member 3, and arranged opposite each other to repel each other in a direction orthogonal to the axis C of rotation of the roller body 2 so as to support the stationary member 3 and roller body 2 without contacting; and a rotary-side yoke and a stationary-side yoke which are provided on both sides of the rotary-side permanent magnet and stationary-side permanent magnet in the axial direction of the roller body 2 respectively, and arranged opposite each other in a direction orthogonal to the axis C of rotation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an induction heat roller device.

  Conventionally, for example, a continuous heat treatment process for a sheet material such as plastic film, paper, cloth, non-woven fabric, synthetic fiber, metal foil, or a continuous material such as a web material, a wire (thread) material, etc., is guided inside the rotating roller body. An induction heating roller device is used in which a heat generation mechanism is arranged to heat the peripheral wall portion of the roller body by an induced current.

  In this induction heating roller device, a support body that supports an induction heating mechanism is provided inside the roller body, and the support body is supported by the roller body via a rolling bearing. Specifically, a rolling bearing is provided between the outer peripheral surface of the support and the inner peripheral surface of the journal portion of the roller body.

JP 2000-277245 A

  However, there is a problem that the rolling bearing is stressed by the deflection of the support that supports the induction heating mechanism, and the life of the rolling bearing is shortened. In addition, since the life of the rolling bearing differs depending on the use conditions such as the number of rotations of the roller body and the use temperature, the induction heat roller device needs to be replaced at a different timing. Furthermore, it is necessary to perform maintenance work such as lubrication on the rolling bearing. In addition, due to the structure in which the rolling bearing is arranged on the outer peripheral surface of the support, the radial dimension of the journal portion increases, which may hinder the design of the apparatus for mounting the roller body. Further, when the radial dimension of the journal portion is increased, the diameter of the roller body is hindered by the radial dimension.

  On the other hand, this inventor has considered the structure which supports a support body non-contactingly with respect to a roller main body using a permanent magnet, without using a rolling bearing. At this time, in order to stably support the induction heating mechanism and the support that supports the induction heating mechanism, it is necessary to reinforce the magnetic force of the permanent magnet. However, when the magnetic force is strengthened only by the permanent magnet, the size of the permanent magnet becomes large.

  Therefore, the present invention has been made to solve the above-described problems. In the induction heating roller device, various problems caused by providing a rolling bearing between the roller body and the stationary member are suppressed, and a permanent magnet is used. Therefore, when the support body is supported in a non-contact manner with respect to the roller body, the main problem is to increase the support force of the stationary member with respect to the roller body without depending only on the size of the permanent magnet.

  That is, an induction heating roller device according to the present invention includes a hollow roller body that is rotatably supported, a stationary member that has at least an induction coil, and is disposed in a stationary state in the hollow of the roller body, and the roller A rotation-side permanent magnet that is provided on the main body and the stationary member and is opposed to be opposed to each other in a direction orthogonal to the rotation axis of the roller body, and supports the stationary member in a non-contact manner with respect to the roller body; A stationary side permanent magnet, a rotating side yoke and a stationary side provided on both sides of each of the rotating side permanent magnet and the stationary side permanent magnet in the axial direction of the roller body, and arranged to face each other in a direction perpendicular to the rotating shaft And a yoke.

According to this induction heating roller device, since the rolling bearing can be made unnecessary, maintenance work such as replacement of the bearing and lubrication due to deterioration of the rolling bearing can be made unnecessary. In addition, since the stationary member is supported by the rotating-side permanent magnet portion and the stationary-side permanent magnet portion in a non-contact manner on the roller body, there is no need for an installation space for the rolling bearing between the stationary member and the roller body. The increase in the radial dimension due to the installation is prevented, and the diameter can be reduced.
In particular, since the rotation-side yoke and the stationary-side yoke are provided on both sides of the rotation-side permanent magnet and the stationary-side permanent magnet in the axial direction of the roller body, the magnetic force of the rotation-side permanent magnet and the stationary-side permanent magnet is strengthened, Their resilience can be increased. Thereby, the support force of the stationary member with respect to the roller body can be increased without depending only on the size of the permanent magnet, and the non-contact support of the stationary member can be stabilized.

  As a specific embodiment of the rotation-side permanent magnet and the stationary-side permanent magnet, it is conceivable to provide a plurality along the axial direction. In this configuration, in order to enhance the repulsive force by increasing the magnetic force of each permanent magnet, the rotating side yoke is provided on each side of the plurality of rotating side permanent magnets, and the stationary side yoke is It is desirable to be provided on both sides of each of the plurality of stationary permanent magnets.

  In order to easily adjust the support force of the stationary member with respect to the roller body according to the use conditions such as the load of the stationary member and the number of rotations of the roller body, the number of the rotating side permanent magnets and the number of the stationary side permanent magnets is the number of rotations. It is desirable to be able to change along the axial direction of the shaft.

  As a specific embodiment of each permanent magnet, the rotation-side permanent magnet and the stationary-side permanent magnet may be composed of a plurality of permanent magnet elements provided radially in a plane orthogonal to the rotation axis. .

  In order to position the stationary member in the axial direction with respect to the roller body, a second rotation-side permanent magnet provided on the roller body and the stationary member and arranged to oppose each other in the axial direction of the roller body It is desirable to further include a part and a second stationary side permanent magnet part.

  According to the present invention configured as described above, various problems caused by providing a rolling bearing between the roller body and the stationary member in the induction heating roller device can be suppressed, and the supporting force of the stationary member with respect to the roller body can be increased. it can.

It is sectional drawing which shows typically the structure of the induction heating roller apparatus of this embodiment. It is the front view and side view which show the structure of the rotation side permanent magnet of the same embodiment, and a stationary side permanent magnet. It is a partial expanded sectional view which shows the structure of the roller main body one end part side of the embodiment. It is a partial expanded sectional view which shows the structure of the roller main body other end part side of the embodiment. It is the front view and side view which show the structure of the rotation side yoke of the same embodiment, and a stationary side yoke. It is the front view and side view which show the structure of the rotation side yoke of the same embodiment, and a stationary side yoke. It is the front view and AA sectional view taken on the line which show the structure of the 2nd rotation side permanent magnet part of the same embodiment, and a 2nd stationary side permanent magnet part.

  The induction heating roller device 100 according to the present embodiment is, for example, in a continuous heat treatment process of a continuous material such as a sheet material such as a plastic film, paper, cloth, nonwoven fabric, synthetic fiber, and metal foil, a web material, and a wire (thread) material. It is used.

<Device configuration>
Specifically, as shown in FIG. 1, the induction heat roller device 100 includes a hollow cylindrical roller body 2 that is rotatably supported, and a stationary member 3 that is disposed in a stationary state in the hollow of the roller body 2. And a rotating-side permanent magnet portion 4 and a stationary-side permanent magnet portion 5 that support the stationary member 3 in the radial direction in a non-contact manner with respect to the roller body 2.

  The roller body 2 includes a cylindrical shell portion 21 and a pair of journal portions 22 provided at both ends of the shell portion 21. The journal portion 22 includes a flange portion 221 that covers the end opening of the shell portion 21, and a hollow drive shaft 222 that is integrally formed with the flange portion 221. The drive shaft 222 is rotatably supported by the machine base 62 via a bearing 61 such as a rolling bearing. The roller body 2 is configured to be rotated by a driving force applied from the outside, for example, by a motor or the like.

  The stationary member 3 includes an induction heat generating mechanism 31 for causing the shell portion 21 of the roller body 2 to generate heat, and a support body 32 having an axial shape for supporting the induction heat generating mechanism 31.

  The induction heat generating mechanism 31 includes a cylindrical iron core 311 having a cylindrical shape and an induction coil 312 wound around the outer peripheral surface of the cylindrical iron core 311. And the support body 32 is attached to each of the both ends of the cylindrical iron core 311. Each of the support bodies 32 is inserted into the drive shaft 222 and is rotatably supported by the drive shaft 222 by the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5.

  Thus, the induction heat generating mechanism 31 is supported in a suspended state inside the roller body 2 and is held stationary regardless of the rotation of the roller body 2. A lead wire (not shown) is connected to the induction coil 312, and an AC power source (not shown) for applying an AC voltage is connected to the lead wire via a power adjustment device (not shown). ing.

  By such an induction heating mechanism 31, an alternating magnetic flux is generated when an AC voltage is applied to the induction coil 312, and the alternating magnetic flux passes through the shell portion 21 of the roller body 2. This passage generates an induced current in the shell portion 21, and the shell portion 21 generates Joule heat by the induced current.

  The rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 are provided on the roller body 2 and the stationary member 3 and are arranged around the rotation axis C of the roller body 2 and in a direction orthogonal to the rotation axis C. The electrodes are arranged so as to repel each other, that is, so that the polarities of the surfaces facing each other are the same.

  Although the rotation side permanent magnet part 4 and the stationary side permanent magnet part 5 of this embodiment use a neodymium magnet, other than that, an alnico magnet or a ferrite magnet may be used.

  Specifically, the rotation-side permanent magnet unit 4 has a plurality of rotation-side permanent magnets 4U divided in the axial direction of the rotation axis C as shown in FIGS.

  Each rotation-side permanent magnet 4U is unitized by a plurality (six in FIG. 2) of permanent magnet elements 4a to 4f provided radially in a plane orthogonal to the rotation axis C.

  As shown in FIG. 2, the plurality of permanent magnet elements 4 a to 4 f have the same shape as each other, and have a fan shape obtained by dividing an annular ring in the circumferential direction. And each permanent magnet element 4a-4f has an equal cross-sectional shape in an axial direction, The front end surface (inner side surface) 41 has comprised the concave circular arc shape. The plurality of permanent magnet elements 4a to 4f configured in this way are arranged such that their tip surfaces 41 are located on the same circle as viewed from the axial direction. The polarities of the tip surfaces 41 of the plurality of permanent magnet elements 4a to 4f are N poles. Each magnet unit 4U may be composed of a plurality of permanent magnet elements other than six, and is not limited to being equally divided.

  Further, as shown in FIG. 2, the stationary-side permanent magnet unit 5 also includes a plurality of stationary-side permanent magnets 5 </ b> U divided in the axial direction of the rotation axis C, similarly to the rotating-side permanent magnet unit 4.

  Each stationary-side permanent magnet 5U is provided corresponding to the rotating-side permanent magnet 4U of the rotating-side permanent magnet portion 4, and a plurality (six in FIG. 2) are provided radially on a plane orthogonal to the rotation axis C. The permanent magnet elements 5a to 5f are unitized.

  As shown in FIG. 2, the plurality of permanent magnet elements 5 a to 5 f have the same shape as each other, and have a fan shape obtained by dividing an annular ring in the circumferential direction. And each permanent magnet element 5a-5f has an equal cross-sectional shape in an axial direction, The front end surface (outer surface) 51 has the permanent magnet element 4a which comprises the magnet unit 4U of the rotation side permanent magnet part 4. FIG. A protruding arc shape corresponding to the tip surface 41 of ˜4f is formed. The plurality of permanent magnet elements 5a to 5f configured in this way are arranged such that their front end surfaces 51 are located on the same circle when viewed from the axial direction. In addition, the polarity of the front end surface 51 of the plurality of permanent magnet elements 5 a to 5 f is the N pole, like the rotation side permanent magnet portion 4. Further, each magnet unit 5U may be composed of a plurality of permanent magnet elements other than six, and is not limited to being equally divided.

  3 and 4, the rotation-side permanent magnet portion 4 of the present embodiment has rotation-side yokes 4Y provided on both sides of the rotation-side permanent magnet 4U in the axial direction of the roller body 2. ing. The stationary side permanent magnet portion 5 has stationary side yokes 5Y provided on both sides of the stationary side permanent magnet 5U in the axial direction. The rotation-side yoke 4Y and the stationary-side yoke 5Y are arranged to face each other in the direction orthogonal to the rotation axis C.

  The rotation side yoke 4Y is provided on both sides of each of the plurality of rotation side permanent magnets 4U as shown in FIGS. In the present embodiment, three rotation-side yokes 4Y are provided on both sides of each of the two rotation-side permanent magnets 4U.

  Specifically, as shown in FIGS. 5 and 6, the rotation-side yoke 4Y has an annular shape, and has a contact surface portion 4Y1 in contact with the rotation-side permanent magnet 4U on the outer diameter side portion thereof. The inner diameter side portion has a separation surface portion 4Y2 that is separated from the rotation-side permanent magnet 4U. The contact surface portion 4Y1 is in contact with the entire circumferential direction on the side surface in the axial direction of the rotating permanent magnet 4U. The separation surface portion 4Y2 is separated over the entire circumferential direction on the side surface in the axial direction of the rotation-side permanent magnet 4U.

  Of the three rotation-side yokes 4Y of the present embodiment, two rotation-side yokes 4Y located on both sides are configured to contact one rotation-side permanent magnet 4U (see FIG. 5) and are located in the center. One rotation-side yoke 4Y is configured to contact two rotation-side permanent magnets 4U (see FIG. 6).

  In the present embodiment, the contact surface portion 4Y1 of the rotation-side yoke 4Y contacts the outer diameter side portion (S pole) of the rotation-side permanent magnet 4U, so that the polarity of the tip surface (inner surface) of the rotation-side yoke 4Y is , S pole.

  As shown in FIGS. 3 and 4, the stationary yoke 5Y is provided on both sides of each of the plurality of stationary permanent magnets 5U. In the present embodiment, three stationary side yokes 5Y are provided on both sides of each of the two stationary side permanent magnets 5U.

  Specifically, as shown in FIGS. 5 and 6, the stationary side yoke 5Y has an annular shape, and has a contact surface portion 5Y1 in contact with the stationary side permanent magnet 5U on its inner diameter side portion. The radial portion has a separation surface portion 5Y2 that is separated from the stationary permanent magnet 5U. The contact surface portion 5Y1 is in contact with the entire circumferential direction on the axial side surface of the stationary permanent magnet 5U. The separation surface portion 5Y2 is separated over the entire circumferential direction on the side surface in the axial direction of the stationary permanent magnet 5U.

  Of the three stationary side yokes 5Y of the present embodiment, two stationary side yokes 5Y located on both sides are configured to contact one stationary side permanent magnet 5U (see FIG. 5) and are located in the center. One stationary yoke 5Y is configured to contact two stationary permanent magnets 5U (see FIG. 6).

  In the present embodiment, the contact surface portion 5Y1 of the stationary side yoke 5Y contacts the inner diameter side portion (S pole) of the stationary side permanent magnet 5U, so that the polarity of the distal end surface (outer surface) of the stationary side yoke 5Y is S pole. Thereby, the front end surface of the rotation side yoke 4Y and the front end surface of the stationary side yoke 5Y facing it have the same polarity.

  As shown in FIGS. 3 and 4, the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 of the present embodiment are provided on the outer side in the axial direction than the journal portion 22 of the roller body 2.

  Specifically, the rotation-side permanent magnet portion 4 is provided on the rotation-side attachment member 9 provided at each of both axial ends of the journal portion 22. The rotation-side attachment member 9 has a cylindrical shape, and the rotation-side permanent magnet portion 4 is provided on the inner peripheral surface of the rotation-side attachment member 9 over the entire circumference or substantially the entire circumference. That is, the rotation-side permanent magnet portion 4 is attached to the journal portion 22 via the rotation-side attachment member 9.

  At this time, the numbers of the rotation-side permanent magnets 4U and the rotation-side yoke 4Y attached to the rotation-side attachment member 9 can be changed along the axial direction. In detail, as shown in FIG. 4, a desired number of rotation-side permanent magnets 4U and rotation-side yoke 4Y are mounted on the mounting portion 91 formed on the inner peripheral surface of the rotation-side mounting member 9 along the axial direction. After that, the rotation-side permanent magnet 4U and the rotation-side yoke 4Y are attached by fixing the rotation-side pressing member 10 that presses the rotation-side permanent magnet 4U and the rotation-side yoke 4Y in the axial direction to the rotation-side mounting member 9. At this time, the rotation-side pressing member 10 presses the rotation-side permanent magnet 4U and the rotation-side yoke 4Y from the outside in the axial direction toward the inside. The rotation-side pressing member 10 presses the rotation-side permanent magnet 4U and the rotation-side yoke 4Y by being fixed to the rotation-side mounting member 9 by fastening elements 11 such as bolts.

  3 and 4 show the case where the two rotation-side permanent magnets 4U and the three rotation-side yokes 4Y are mounted at both end portions in the axial direction, but other numbers of rotation-side permanent magnets 4U and rotations are provided. When the side yoke 4Y is mounted, the shape of the rotation side pressing member 10 is changed accordingly, or a spacer is interposed between the rotation side pressing member 10 and the rotation side yoke 4Y, thereby rotating the rotation side permanent magnet 4U. And the rotation side yoke 4Y is pressed.

  Further, the stationary-side permanent magnet portion 5 is provided over the entire circumference or substantially the entire circumference of the outer circumferential surface of the portion located inside each of the rotation-side mounting members 9 on both sides of the support body 32.

  At this time, the number of stationary permanent magnets 5U and stationary yokes 5Y attached to the support 32 can be changed along the axial direction. Specifically, as shown in FIG. 4, a desired number of stationary side permanent magnets are attached to the mounting portions 321 formed on the outer peripheral surfaces of both end portions in the axial direction of the support body 32 along the axial direction from the axial end portions. After the 5U and the stationary side yoke 5Y are mounted, the stationary side permanent magnet 5U and the stationary side yoke are fixed by fixing the stationary side pressing member 12 that presses the stationary side permanent magnet 5U and the stationary side yoke 5Y in the axial direction to the support body 32. 5Y is attached. The stationary-side pressing member 12 presses the stationary-side permanent magnet 5U and the stationary-side yoke 5Y by receiving a pressing force from the screwing element 13 that is screwed to the support body 32.

  3 and 4 show the case where two stationary side magnets 5U and three stationary side yokes 5Y are mounted at both ends in the axial direction, other numbers of stationary side permanent magnets 5U and stationary side are shown. When the yoke 5Y is mounted, the shape of the stationary side pressing member 12 is changed accordingly, or a spacer is interposed between the stationary side pressing member 12 and the stationary side yoke 5Y, so that the stationary side permanent magnet 5U and The stationary yoke 5Y is pressed.

  As described above, the numbers of the rotation-side permanent magnet 4U and the rotation-side yoke 4Y of the rotation-side permanent magnet section 4 and the numbers of the stationary-side permanent magnet 5U and the stationary-side yoke 5Y of the stationary-side permanent magnet section 5 are determined by the induction heating mechanism 31 and the support. It changes according to use conditions, such as the weight of the body 32 or the rotation speed of the roller main body 2.

  Further, as shown in FIGS. 4 and 7, the induction heating roller device 100 of the present embodiment is configured so that the stationary member 3 supported in a non-contact manner in the radial direction by the permanent magnet portions 4 and 5 is axially disposed with respect to the roller body 2. A second rotation-side permanent magnet portion 7 and a second stationary-side permanent magnet portion 8 for non-contact positioning in the (thrust direction) are provided.

  The second rotation-side permanent magnet portion 7 and the second stationary-side permanent magnet portion 8 are provided on the roller body 2 and the stationary member 3, and are disposed so as to face each other in the axial direction of the roller body 2. In this embodiment, like the permanent magnet parts 4 and 5, the roller body 2 is provided on the outer side in the axial direction than the journal part 22.

  Specifically, as shown in FIG. 7, the second rotation-side permanent magnet portion 7 has a substantially annular shape, and one end face is an N pole and the other end face is an S pole. . The second stationary-side permanent magnet portion 8 has an annular shape arranged so as to sandwich the second rotating-side permanent magnet portion 7 from both sides in the axial direction. The surface facing the second rotation-side permanent magnet portion 7 is an N pole, and the other second stationary side permanent magnet portion 8 is the surface facing the second rotation-side permanent magnet portion 7 as an S pole. ing.

  And the 2nd rotation side permanent magnet part 7 is attached to the rotation side press member 10 fixed to one rotation side attachment member 9, as shown in FIG. In this embodiment, the 2nd rotation side permanent magnet part 7 is clamped by the 1st element 10a and the 2nd element 10b which were divided | segmented into the axial direction of the rotation side attachment member 9. As shown in FIG. The first element 10a and the second element 10b are fixed by a fastening element 10c such as a bolt.

  Further, the second stationary side permanent magnet portion 8 is attached to the stationary side pressing member 12. In the present embodiment, one second stationary-side permanent magnet portion 8 is held by the first element 12a divided in the axial direction of the stationary-side pressing member 12, and the other second stationary-side permanent magnet portion 8 is The stationary side pressing member 12 is held by the second element 12b divided in the axial direction. A spacer 12c is provided between the first element 12a and the second element 12b of the stationary side pressing member 12 to determine the distance between the two second stationary side permanent magnet portions 8.

<Effect of this embodiment>
According to the induction heating roller device 100 configured in this way, the rolling bearing that supports the stationary member 3 can be eliminated, and therefore maintenance work such as replacement of the bearing and lubrication due to deterioration of the rolling bearing is eliminated. be able to.

  In addition, since the stationary member 3 is supported by the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 in a non-contact manner on the roller body 2, a space for installing the rolling bearing is required between the stationary member 3 and the roller body 2. In addition, an increase in the radial dimension due to the installation of the rolling bearing can be prevented, and the diameter of the roller body 2, particularly the journal portion 22, can be reduced.

  In particular, in this embodiment, the rotation-side permanent magnet 4U and the stationary-side yoke 5Y are provided on both sides of the rotation-side permanent magnet 4U and the stationary-side permanent magnet 5U in the axial direction of the roller body 2, so The magnetic force of the stationary permanent magnet 5U can be strengthened to increase the repulsive force. Thereby, the supporting force of the stationary member 3 with respect to the roller main body 2 can be increased without depending only on the size of the permanent magnets 4U and 5U, and the non-contact support of the stationary member 3 can be stabilized.

  In the present embodiment, the number of the rotation-side permanent magnets 4U and the number of the stationary-side permanent magnets 5U can be changed along the axial direction of the rotation axis C. The supporting force of the stationary member 3 with respect to the roller body 2 can be easily adjusted according to the usage conditions such as the number.

  Furthermore, the axial positioning of the stationary member 3 with respect to the roller body 2 can be performed in a non-contact manner using the second rotating side permanent magnet portion 7 and the second stationary side permanent magnet portion 8. Thereby, the position shift of the axial direction which arises by carrying out the non-contact support of the stationary member 3 in the radial direction by the rotation side permanent magnet part 4 and the stationary side permanent magnet part 5 can be eliminated with a simple and compact configuration.

  In addition, the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5, the second rotation-side permanent magnet portion 7, and the second stationary-side permanent magnet portion 8 are provided on the outer side in the axial direction of the journal portion 22. Since it is not necessary to provide a permanent magnet between the journal portion 22 and the support body 32 of the main body 2, the diameter of the journal portion 22 can be reduced as much as possible, and the machine base 62 that supports the journal portion 22 is designed. Becomes easy.

<Other modified embodiments>
The present invention is not limited to the above embodiment.

  For example, the rotation-side permanent magnet portion 4 is provided on the roller body 2 by being attached to the rotation-side attachment member 9, but is attached to the inner peripheral surface of each drive shaft 222 of the journal portion 22. It may be.

  Moreover, it is good also considering the shape of each of the some permanent magnet elements 4a-4d and 5a-5d which comprise one permanent magnet 4U and 5U as mutually different shapes. For example, it is conceivable that the circumferential dimension of one permanent magnet element and the circumferential dimension of another permanent magnet element are different from each other.

  In addition, the shape of the permanent magnet elements 4a to 4d and 5a to 5d constituting one permanent magnet 4U and 5U and the permanent magnet elements 4a to 4U constituting another permanent magnet 4U and 5U in the plurality of permanent magnets 4U and 5U. The shapes 4d and 5a to 5d may be different from each other. For example, in each permanent magnet 4U and 5U, it is possible to make the thickness (axial dimension) of the permanent-magnet elements 4a-4d and 5a-5d to comprise differ.

  In addition to the above embodiment, the rotation-side permanent magnet portion 4 is provided on the inner peripheral surface of the shell portion 21 of the roller body 2, and the stationary-side permanent magnet portion is provided on the outer peripheral surface of the induction heat generating mechanism 31 (induction coil 312) facing it. 5 may be provided. If it is this structure, the contact of the induction heating mechanism 31 and the roller main body 2 by the bending of the induction heating mechanism 31 and the support body 32 can be prevented suitably.

  In the above-described embodiment, one yoke is disposed between adjacent permanent magnets, and the one yoke is shared by two permanent magnets. However, the magnets of the respective permanent magnets are disposed between adjacent permanent magnets. You may arrange | position two yokes used as a path | route.

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

DESCRIPTION OF SYMBOLS 100 ... Induction heating roller apparatus 2 ... Roller main body 21 ... Shell part C ... Rotating shaft 22 ... Journal part 3 ... Stationary member 312 ... Induction coil 32 ... Support body 4 ... Rotating side permanent magnet part 4U ... Magnet units 4a to 4d ... Permanent magnet element 5 ... Static side permanent magnet part 5U ... Magnet units 5a to 5d ... Permanent magnet element 7 ..Second rotation side permanent magnet part 8 ... second stationary side permanent magnet part

Claims (5)

A hollow roller body rotatably supported;
A stationary member having at least an induction coil and disposed stationary in the hollow of the roller body;
Rotation-side permanent provided on the roller body and the stationary member so as to oppose each other so as to repel each other in a direction perpendicular to the rotation axis of the roller body and to support the stationary member against the roller body in a non-contact manner. A magnet and a stationary permanent magnet;
An induction provided with a rotation-side yoke and a stationary-side yoke that are provided on both sides of each of the rotation-side permanent magnet and the stationary-side permanent magnet in the axial direction of the roller body, and are arranged to face each other in a direction orthogonal to the rotation axis. Heating roller device. A plurality of the rotation side permanent magnets and the stationary side permanent magnets are provided along the axial direction,
The rotation side yoke is provided on both sides of each of the plurality of rotation side permanent magnets,
The induction heating roller device according to claim 1, wherein the stationary side yoke is provided on both sides of each of the plurality of stationary side permanent magnets.   The induction heating roller device according to claim 2, wherein the number of the rotation-side permanent magnets and the number of the stationary-side permanent magnets can be changed along the axial direction of the rotation shaft.   The induction heating roller according to any one of claims 1 to 3, wherein the rotation-side permanent magnet and the stationary-side permanent magnet are composed of a plurality of permanent magnet elements provided radially in a plane orthogonal to the rotation axis. apparatus.   2. A second rotation-side permanent magnet portion and a second stationary-side permanent magnet portion that are provided on the roller body and the stationary member and are opposed to each other so as to repel each other in the axial direction of the roller body. The induction heating roller device according to any one of claims 1 to 4.