WO2018012462A1

WO2018012462A1 - Induction heat roller device

Info

Publication number: WO2018012462A1
Application number: PCT/JP2017/025149
Authority: WO
Inventors: 嘉秀北野; 孝次北野; 築妹尾; 深水嶋
Original assignee: トクデン株式会社
Priority date: 2016-07-14
Filing date: 2017-07-10
Publication date: 2018-01-18

Abstract

The purpose of the present invention is to suppress, in an induction heat roller device, a variety of shortcomings due to providing a bearing between a roller main body and a stationary member. The induction heat roller device comprises: a hollow roller main body 2 supported in such a manner as to rotatable; a stationary member 3 having at least an induction coil 312 and disposed in a stationary state inside the hollow space of the roller main body 2; and a rotation-side permanent magnet part 4 and a stationary-side permanent magnet part 5 provided on the roller main body 2 and the stationary member 3 respectively, disposed in such a manner as to face one another along the periphery of the rotation axis C of the roller main body 2, while repulsing one another in a direction orthogonal to the rotation axis C. The stationary member 3 is supported in the radial direction by the roller main body 2 in a contact-free manner through the rotation-side permanent magnet part 4 and the stationary-side permanent magnet part 5.

Description

Induction heating roller device

The present invention relates to an induction heating 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. 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 for supporting the induction heating mechanism is provided inside the roller body, and the support body is supported on 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.

However, due to the structure in which the rolling bearing is disposed on the outer peripheral surface of the support, the radial dimension of the journal portion is increased corresponding to the rolling bearing. This may hinder the design of the device for attaching 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. Furthermore, since the rolling bearing is used, it is necessary to perform maintenance work such as replacement of the bearing and lubrication due to deterioration of the bearing.

On the other hand, in recent years, the roller main body is becoming smaller and longer, and the induction heating mechanism and the support shaft arranged inside the roller body are also made smaller and longer. If it does so, the mechanical strength of an induction heating mechanism and a support shaft will fall, and the bending of an induction heating mechanism and a support shaft will become large. As a result, the induction coil of the induction heating mechanism may come into contact with the inner peripheral surface of the roller body, which becomes a design limit for the radial dimension of the roller body.

For this reason, it is common to design the diameter of the roller body to be large so that the induction coil does not contact the inner peripheral surface of the roller body, but this may not be allowed in the heat treatment process in which the roller body is used. Further, the diameter of the roller main body is increased, resulting in an increase in cost. When such an increase in diameter is not permitted, a rolling bearing is provided in the central portion in the axial direction of the induction coil where the amount of deflection is the largest, so that the roller body and the induction coil are not in contact with each other.

However, since a rolling bearing is used, not only the maintenance work as described above is required, but also a rolling bearing is provided at the center of the roller body, so an approach such as the need to disassemble the roller body is an approach. It's not easy. In addition, vibration is a problem because the rolling bearing is located directly under the center of the roller body through which the product passes during heat treatment in the usage application of the roller body.

JP 2000-277245 A

Accordingly, the present invention has been made to solve the above-described problems, and its main problem is to suppress various problems caused by providing a rolling bearing between the roller body and the stationary member in the induction heat roller device. It is a thing.

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 rotating-side permanent magnet portion and a stationary side that are provided on the main body and the stationary member, are disposed along the rotation axis of the roller body, and are opposed to each other so as to repel each other in a direction orthogonal to the rotating shaft. And the stationary member is supported on the roller body in a non-contact manner by the rotating-side permanent magnet portion and the stationary-side permanent magnet portion.

According to this induction heating roller device, 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, the installation space for the rolling bearing is provided between the stationary member and the roller body. It is not necessary to prevent an increase in the radial dimension due to the installation of the rolling bearing and to reduce the diameter.
Further, 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.
Furthermore, the stationary member and the roller main body can be prevented from coming into contact with each other by arranging the rotating side permanent magnet portion and the stationary side permanent magnet portion in a portion where the bending amount of the stationary member is large. Thereby, even if the roller main body is made smaller and longer, the design limit of the radial dimension of the roller main body can be eliminated. Here, the portion of the stationary member where the amount of bending is large is the central portion of the roller body, but since the rotation-side permanent magnet portion and the stationary-side permanent magnet portion are arranged in the center portion, maintenance work is unnecessary. In addition, the problem of vibration caused by providing a rolling bearing immediately below the center of the roller body can be solved.

In the case of an induction heating roller device that does not need to consider the bending of a stationary member, the roller body has a cylindrical shell portion and a pair of journal portions provided at both ends of the shell portion. The stationary member supports the induction coil, and has a support body that extends from the pair of one journal portion to the other journal portion, and the rotation-side permanent magnet portion is at least one of the one side. It is desirable that the journal part is provided and the stationary permanent magnet part is provided on the support.
If it is this structure, the longitudinal direction both ends of a stationary member can be supported non-contactingly by a rotation side permanent magnet part and a stationary side permanent magnet part. Thereby, the diameter of the journal part of a roller main body can be reduced, and the apparatus design for attaching a roller main body can be performed without difficulty.

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.

A drive mechanism for rotating the roller body is connected to one journal of the roller body. A lead wire for supplying power to the induction coil is provided on the other journal side of the support. In this configuration, in order to position the stationary member with respect to the roller body in the axial direction and reduce the number of permanent magnets, the one journal side of the support body includes the rotating side permanent magnet portion and the stationary side permanent magnet. It is desirable that the one journal is supported in a non-contact manner by the magnet portion, and the other journal side of the support is supported by an external support member fixed to the outside of the roller body.

In order to suitably prevent contact between the stationary member and the roller body due to the bending of the stationary member, the roller body includes a cylindrical shell portion and a pair of journal portions provided at both ends of the shell portion. The stationary member supports the induction coil, and has a support body that extends from the pair of one journal portion to the other journal portion, and the rotation-side permanent magnet portion includes the shell It is desirable that the stationary permanent magnet portion is provided in the induction coil.

The 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 portion and a stationary-side permanent magnet portion that are provided on the main body and the stationary member and support the stationary member with respect to the roller body in a non-contact manner; The magnet unit has a plurality of magnet units divided in the axial direction of the rotation shaft of the roller body, and the number of the magnet units can be changed along the axial direction of the rotation shaft. It is characterized by.

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, in the present invention, the rotation-side permanent magnet portion or the stationary-side permanent magnet portion has a magnet unit configured by being divided in the axial direction of the rotation axis of the roller body, and the number of magnet units is the axial direction of the rotation shaft. Therefore, the supporting force of the stationary member with respect to the roller body can be easily adjusted according to the use conditions such as the load of the stationary member and the rotation number of the roller body.

As a specific embodiment of the magnet unit, it is conceivable that the magnet unit is composed of a plurality of permanent magnet elements provided radially in a plane orthogonal to the rotation axis.

The stationary member includes a support body that supports the induction coil, the stationary permanent magnet section includes the magnet unit, and the magnet unit of the stationary permanent magnet section includes an axial end of the support body. It can be considered that it can be changed along the axial direction by being mounted from the portion.
With this configuration, it is only necessary to mount the magnet unit from the end in the axial direction of the support, so that the attachment and removal of the magnet unit can be simplified.

The roller body includes a cylindrical shell portion and a pair of journal portions provided at both ends of the shell portion, and the rotating side permanent magnet portion includes the magnet unit, and the rotating side It is conceivable that the magnet unit of the permanent magnet portion can be changed along the axial direction by being attached to the rotation side attachment member attached to the journal portion.
With this configuration, since the magnet unit is attached to the rotation side attachment member attached to the journal part, the magnet unit of the rotation side permanent magnet part can be attached without difficulty without increasing the diameter of the journal part.

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

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 portion and the stationary-side permanent magnet portion in the axial direction of the roller body, the magnetic force of the rotation-side permanent magnet portion and the stationary-side permanent magnet portion is reduced. You can strengthen them to increase their resilience. 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 portion and the stationary-side permanent magnet portion, 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 both sides of each of the plurality of rotating side permanent magnet portions, and the stationary side yoke is It is desirable that the plurality of stationary side permanent magnet portions are provided on both sides.

In addition, 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. A rotation-side permanent magnet portion and a stationary-side permanent magnet portion that are provided on the roller body and the stationary member and support the stationary member in a non-contact manner with respect to the roller body, and between the stationary member and the stationary-side permanent magnet portion And a magnet holder that holds the stationary permanent magnet part, and the magnet holder is attached so that the stationary permanent magnet part can swing relative to the rotating permanent magnet part It is characterized by being.

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, in the present invention, the magnet holding body that holds the stationary side permanent magnet part is attached so that the stationary side permanent magnet part can swing relative to the rotating side permanent magnet part. In addition, the magnet holder tilts according to the bias of the magnetic repulsive force generated between the stationary permanent magnet portions, and the bias of the magnetic repulsive force can be reduced. Thereby, a stationary member can be stably supported with respect to a roller main body.

Specifically, the magnet holder is pivotably attached so as to reduce the bias of the magnetic repulsion force mainly along the axial direction of the roller body. That is, the magnet holder is swingably attached so as to be inclined with respect to a plane including at least the axial direction of the roller body.

Preferably, the magnet holder has a cylindrical shape that is mounted on the mounting portion of the stationary member, and the stationary-side permanent magnet section is provided over the entire circumferential direction of the magnet holder. . Here, the provision over the entire circumferential direction includes a configuration provided continuously over the entire circumferential direction or a configuration provided intermittently over the entire circumferential direction.
If it is this structure, a stationary-side permanent magnet part can be arrange | positioned to the whole circumferential direction of a stationary member by mounting | wearing a mounting part with a magnet holding member. Moreover, it can be set as the structure which can rock | fluctuate so that a stationary-side permanent magnet part may reduce the bias | inclination of a magnetic repulsion force over the whole circumferential direction.

As a specific configuration for enabling the magnet holder to swing with respect to a plane including the axial direction of the roller body, either one of the opposing surfaces of the magnet holder and the mounting portion is arranged on the other opposing surface. It is desirable to have a protruding portion that protrudes toward the surface, and that the other opposing surface is in contact with the protruding portion and can swing.
With this configuration, the magnet holder swings about the protrusion as a swing center simply by forming the protrusion, and the configuration can be simplified.

In order to suitably reduce the bias of the magnetic repulsion force along the axial direction of the roller body, a plurality of stationary-side permanent magnet portions are provided along the axial direction on the outer peripheral surface of the magnet holder, It is desirable that the protruding portion is located at a central portion of the stationary side permanent magnet portion in the axial direction.

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 heat roller device can be suppressed.

It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 1st Embodiment. It is a figure which shows the specific structure of the rotation side permanent magnet part of 1st Embodiment, and a stationary side permanent magnet part. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 2nd Embodiment. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 3rd Embodiment. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 4th Embodiment. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 5th Embodiment. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 6th Embodiment. It is the figure which shows the specific structure of the rotation side permanent magnet part of 6th Embodiment, and a stationary side permanent magnet part, and its AA sectional view. It is the front view and side view which show the structure of the rotation side permanent magnet part of 7th Embodiment, and a stationary side permanent magnet part. It is a front view which shows the structure of the magnet unit of 7th Embodiment. It is a partial expanded sectional view which shows the periphery structure of the permanent magnet part in the axial direction both ends of 7th Embodiment. It is the front view and sectional view on the AA line which show the composition of the 2nd rotation side permanent magnet part and the 2nd stationary side permanent magnet part of a 7th embodiment. It is a partial expanded sectional view which shows the structure of the roller main body one end part side of 8th Embodiment. It is a partial expanded sectional view which shows the structure of the roller main body other end part side of 8th Embodiment. It is the front view and side view which show the structure of the rotation side yoke of 8th Embodiment, and the stationary side yoke. It is the front view and side view which show the structure of the rotation side yoke of 8th Embodiment, and the stationary side yoke. It is sectional drawing which shows typically the structure of the induction heating roller apparatus of 9th Embodiment. It is a partial expanded sectional view which shows the structure of the rotation side permanent magnet part of 9th Embodiment, and a stationary side permanent magnet part. It is sectional drawing which shows the structure of the magnet holder of 9th Embodiment. It is sectional drawing which shows typically the mode of the rocking | fluctuation of the magnet holder of 9th Embodiment.

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 DESCRIPTION OF SYMBOLS 4 ... Rotation side permanent magnet part 5 ... Stationary side permanent magnet part 7 ... 2nd rotation side permanent magnet part 8 ... 2nd stationary side permanent magnet part 11 ... Rolling bearing 12 ... Drive mechanism 13 ... external support member

<First Embodiment>
The induction heating roller device 100 according to the first embodiment includes, for example, a continuous heat treatment process for 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. Is used.

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 has 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 has 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 heating 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 L 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 L via a power adjustment device (not shown). .

Such an induction heating mechanism 31 generates an alternating magnetic flux 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. Oppositely arranged so as to repel each other. 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, as shown in FIG. 2, the rotation-side permanent magnet portion 4 is provided over the entire inner periphery or substantially the entire periphery of each drive shaft 222 of the journal portions 22 on both sides, and has a substantially cylindrical shape. It is what makes. On the other hand, the stationary-side permanent magnet portion 5 is provided over the entire circumference or substantially the entire circumference of the outer peripheral surface of the portion of the support body 32 located inside each of the drive shafts 222 of the journal portions 22 on both sides. It has a cylindrical shape. That is, the rotation side permanent magnet part 4 and the stationary side permanent magnet part 5 are coaxially arranged. Moreover, the rotation side permanent magnet part 4 and the stationary side permanent magnet part 5 are arranged so that the polarities of the surfaces facing each other are the same. In the present embodiment, the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 are formed into a cylindrical shape by combining circumferentially divided elements 4ra to 4rd, 5ra to 5rd divided into, for example, four equal parts in the circumferential direction. It is comprised so that it may become. The rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 may be divided into a plurality other than four, and are not limited to being equally divided.

According to the induction heating roller device 100 configured as described above, the stationary member 3 is supported by the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 in a non-contact manner on the roller body 2. The installation space of the rolling bearing is not required between the main bodies 2, and the increase of the radial dimension due to the installation of the rolling bearing is prevented, and the diameter of the roller main body 2, particularly the journal portion 22, can be reduced.
Further, 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.

Second Embodiment
Next, the induction heat roller device 100 of the second embodiment will be described with reference to FIG.

The induction heating roller device 100 according to the second embodiment differs from the first embodiment in the positions where the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 are provided.

The rotation-side permanent magnet portion 4 is provided over the entire circumference or substantially the entire circumference of the inner peripheral surface of the shell portion 21 of the roller body 2 and has a cylindrical shape. The stationary permanent magnet unit 5 is provided over the entire circumference or substantially the entire circumference of the outer peripheral surface of the induction coil 312 in the induction heating mechanism 31 and has a cylindrical shape. Other configurations of the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 are the same as those in the first embodiment.

In FIG. 3, both ends of the support 32 are configured to be supported by the roller body 2 by rolling bearings. However, as in the first embodiment, these are the rotation-side permanent magnet unit 4 and It is good also as a non-contact support structure by the stationary side permanent magnet part 5. FIG.

According to the induction heating roller device 100 configured as described above, the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 are arranged at portions where the deflection amount of the stationary member 3 is large (in this embodiment, the central portion in the axial direction of the induction coil 312). ) To prevent the stationary member 3 and the roller body 2 from contacting each other. Thereby, even if the roller main body 2 is reduced in diameter and length, the design limit of the radial dimension of the roller main body 2 can be eliminated. Here, the portion of the stationary member 3 where the deflection amount is large is the central portion of the roller body 2 that is difficult to approach at the time of maintenance, and the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 are arranged in the center portion. Therefore, maintenance work can be eliminated, and the problem of vibration caused by providing a rolling bearing directly under the center of the roller body 2 can be solved.

<Third Embodiment>
Next, an induction heat roller device 100 according to a third embodiment will be described with reference to FIG.

In addition to the first embodiment, the induction heating roller device 100 according to the third embodiment includes a stationary member 3 supported in a radial direction by the

permanent magnets

4 and 5 in the radial direction with respect to the roller body 2 (thrust). A second rotation-side permanent magnet portion 7 and a second stationary-side permanent magnet portion 8 for non-contact positioning in the direction).

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.

Specifically, the second rotation-side permanent magnet portion 7 is provided on the inner surface of each flange portion 221 of the journal portion 22 and has a substantially annular shape. On the other hand, the second stationary permanent magnet 8 is provided on each of both end faces of the induction coil 312, the iron core 311, or a surrounding member surrounding them, and has a substantially annular shape. The two sets of the second rotation-side permanent magnet unit 7 and the second stationary-side permanent magnet unit 8 are arranged so as to face each other on both sides in the axial direction of the induction coil 312. Moreover, the 2nd rotation side permanent magnet part 7 and the 2nd stationary side permanent magnet part 8 are arrange | positioned so that each polarity of the mutually opposing surface may become the same.

According to the induction heating roller device 100 configured as described above, the axial positioning of the stationary member 3 with respect to the roller body 2 is non-contacted by using the second rotating side permanent magnet unit 7 and the second stationary side permanent magnet unit 8. Can be done. 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.

<Fourth embodiment>
Next, an induction heat roller device 100 according to a fourth embodiment will be described with reference to FIG.

The induction heating roller device 100 according to the fourth embodiment differs from the third embodiment in the arrangement of the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 and the second rotation-side permanent magnet unit 7 and the second stationary-side permanent magnet. The arrangement of the magnet part 8 is different.

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 rotation-side attachment members 9 provided at 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.

The support 32 extends from the drive shaft 222 of the journal portion 22 to the inside of the rotation-side mounting member 9, and is stationary over the entire circumference or substantially the entire circumference of the extended portion. A side permanent magnet portion 5 is provided. Other configurations of the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 are the same as those in the first embodiment.

As shown in FIG. 6, the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 of the present embodiment are configured by a plurality of axially divided elements 4sa to 4se and 5sa to 5se that are divided in the axial direction. Yes. Then, the number of axially divided elements 5sa to 5se in the circumferentially divided element 5rd located on the upper side of the stationary permanent magnets 5ra to 5rd divided into four in the circumferential direction is adjusted according to the weight applied to the support 32. To do.

Furthermore, the second rotation side permanent magnet portion 7 and the second stationary side permanent magnet portion 8 are also provided on the outer side in the axial direction than the journal portion 22 of the roller body 2.

Specifically, the second rotation-side permanent magnet portion 7 is provided on one (the right side in FIG. 5) rotation-side mounting member 9. The second rotation-side permanent magnet portion 7 has a substantially annular shape. On the other hand, the 2nd stationary side permanent magnet part 8 is arrange | positioned so that the 2nd rotation side permanent magnet part 7 may be inserted | pinched from the axial direction both sides. Each of the two second rotation side permanent magnet portions 8 is provided on the stationary side mounting member 10 mounted on the support body 32.

According to the induction heating roller device 100 configured as described above, the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5, the second rotation-side permanent magnet unit 7, and the second stationary-side permanent magnet are disposed outside the journal unit 22 in the axial direction. Since the magnet portion 8 is provided, it is not necessary to provide a permanent magnet between the journal portion 22 of the roller body 2 and the support body 32. Therefore, the diameter of the journal portion 22 can be reduced as much as possible. The design of the machine base 62 that supports the journal portion 22 is facilitated.

<Fifth Embodiment>
Next, an induction heat roller device 100 according to a fifth embodiment will be described with reference to FIG.

The induction heating roller device 100 according to the fifth embodiment is different from the third embodiment in the arrangement of the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 and the positioning structure in the axial direction of the stationary member 3 with respect to the roller body 2. Different.

A lead wire L for supplying power to the induction coil 312 is provided from the other axial end side (right side in FIG. 7) of the support 32. On the other hand, since the lead wire L does not pass through one end side (left side in FIG. 7) in the axial direction of the support body 32 where the lead wire L is not provided, the shaft diameter can be reduced. For this reason, one end side in the axial direction of the support body 32 can be configured to be supported by the rolling bearing 11 with respect to the roller body 2. As described above, the support body 32 is supported by the rolling bearing 11 so that the axial positioning is possible.

Further, the other axial end of the support 32 is supported in a non-contact manner by the rotating permanent magnet 4 and the stationary permanent magnet 5 as in the first embodiment.

According to the induction heating roller device 100 configured as described above, the

permanent magnets

4 and 5 are used to fix the stationary member while positioning in the axial direction using the rolling bearing 11 by utilizing the arrangement configuration of the lead wire L in the support 32. 3 can be supported in a non-contact manner with respect to the roller body 2.

<Sixth Embodiment>
Next, an induction heat roller device 100 according to a sixth embodiment will be described with reference to FIG.

The induction heating roller device 100 of the sixth embodiment differs from the third embodiment in the arrangement of the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 and the axial positioning structure of the stationary member 3 with respect to the roller body 2. Different.

A drive mechanism 12 for rotating the roller body 2 is connected to one journal portion 22 of the roller body 2 (left side in FIG. 8). A lead wire L for supplying power to the induction coil 312 is provided from the other axial end side (right side in FIG. 8) of the support body 32. In this configuration, one journal portion 22 side of the support body 32 (left side in FIG. 8) is journaled by the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5 as in the first embodiment. Is supported in a non-contact manner. In FIG. 8, the shaft diameter of the support 32 on which the stationary permanent magnet unit 5 is provided is reduced. Further, the other journal portion 22 side (the right side in FIG. 8) of the support body 32 is supported by an external support member 13 fixed to the outside of the roller body 2.

According to the induction heating roller device 100 configured in this way, the stationary member 3 can be positioned in the axial direction with respect to the roller body 2 by the external support member 13 and the number of permanent magnets can be reduced. Further, since the journal portion 22 side to which the drive mechanism 12 is attached is non-contact supported by the rotation-side permanent magnet portion 4 and the stationary-side permanent magnet portion 5, maintenance work performed by removing the drive mechanism 12 that has been necessary in the past is unnecessary. Can be.

<Seventh embodiment>
Next, an induction heat roller device 100 according to a seventh embodiment will be described.
In the induction heating roller device 100 of the seventh embodiment, the rotation-side permanent magnet unit 4 includes a plurality of magnet units 4U that are divided in the axial direction of the rotation axis C as shown in FIG.

Each magnet unit 4U includes a plurality (four in FIG. 9) of permanent magnet elements 4a to 4d provided radially in a plane orthogonal to the rotation axis C.

The plurality of permanent magnet elements 4a to 4d have the same shape as shown in FIG. Each permanent magnet element 4a to 4d has an equal cross-sectional shape in the axial direction, and a tip surface (inner surface) 41 thereof has a concave arc shape. The plurality of permanent magnet elements 4a to 4d configured in this way are arranged so that their tip surfaces 41 are located on the same circle when viewed in the axial direction. The polarities of the tip surfaces 41 of the plurality of permanent magnet elements 4a to 4d are N poles. Each magnet unit 4U may be composed of a plurality of permanent magnet elements other than four, and is not limited to being equally divided.

The two magnet units 4U adjacent to each other in the axial direction (hereinafter, the other magnet unit is also referred to as 4U ') are arranged at a predetermined angle in the circumferential direction. Specifically, as shown in FIG. 9, the permanent magnet elements 4a′˜4 constituting the other magnet unit 4U ′ are interposed between the permanent magnet elements 4a˜4d constituting one magnet unit 4U when viewed from the axial direction. 4d ′ is positioned so as to be shifted by 45 degrees. By arranging in this way, the other magnet unit 4U 'interpolates between one magnet unit 4U when viewed from the axial direction. Accordingly, the permanent magnet elements 4a to 4d, 4a 'to 4d' are arranged in the entire circumferential direction when viewed from the axial direction.

Further, as shown in FIG. 9, the stationary side permanent magnet unit 5 also includes a plurality of magnet units 5 </ b> U configured to be divided in the axial direction of the rotation axis C, similarly to the rotation side permanent magnet unit 4.

Each magnet unit 5U is provided corresponding to the magnet unit 4U of the rotation-side permanent magnet unit 4, and a plurality (four in FIG. 9) of permanent magnet elements provided radially in a plane orthogonal to the rotation axis C. 5a to 5d.

The plurality of permanent magnet elements 5a to 5d have the same shape as shown in FIG. Each of the permanent magnet elements 5a to 5d has an equal cross-sectional shape in the axial direction, and a tip surface (outer surface) 51 thereof has a permanent magnet element 4a constituting the magnet unit 4U of the rotating side permanent magnet portion 4. It has a protruding arc shape corresponding to the tip surface 41 of 4d. The plurality of permanent magnet elements 5a to 5d configured as described above are arranged so that their front end surfaces 51 are located on the same circle when viewed in the axial direction. The polarities of the front end surfaces 51 of the plurality of permanent magnet elements 5a to 5d are N poles as in the case of the rotation-side permanent magnet portion 4. In addition, each magnet unit 5U may be composed of a plurality of permanent magnet elements other than four, and is not limited to being equally divided.

The two magnet units 5U adjacent to each other in the axial direction (hereinafter, the other magnet unit is also referred to as 5U ′) are circumferentially arranged so as to face the

magnet units

4U and 4U ′ of the rotating-side permanent magnet portion 4. Are disposed at a predetermined angle. Specifically, the permanent magnet elements 5a ′ to 5d ′ constituting the other magnet unit 5U ′ are positioned between the permanent magnet elements 5a to 5d constituting the one magnet unit 5U when viewed from the axial direction. They are offset by 45 degrees. By arranging in this way, the other magnet unit 5U 'interpolates between one magnet unit 5U when viewed from the axial direction. Accordingly, the permanent magnet elements 5a to 5d, 5a 'to 5d' are arranged in the entire circumferential direction when viewed from the axial direction.

As shown in FIG. 11, 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 (specifically, the drive shaft 222) of the roller body 2. ing.

At this time, the number of magnet units 4U attached to the rotation-side attachment member 9 can be changed along the axial direction. Specifically, as shown in FIG. 11, after mounting a desired number of magnet units 4U along the axial direction on the magnet unit mounting portion 91 formed on the inner peripheral surface of the rotation-side mounting member 9, the magnet unit The magnet unit 4U is attached by fixing the rotation side pressing member 10 that presses 4U in the axial direction to the rotation side mounting member 9. At this time, the rotation-side pressing member 10 presses the magnet unit 4U from the outside in the axial direction toward the inside. The rotation-side pressing member 10 presses the magnet unit 4U by being fixed to the rotation-side mounting member 9 by a fastening element 11 such as a bolt.

FIG. 11 shows the case where four magnet units 4U are mounted. For example, when three magnet units 4U are mounted, the shape of the rotation-side pressing member 10 is changed or rotated accordingly. By interposing a spacer between the side pressing member 10 and the magnet unit 4U, the magnet unit 4U is pressed.

Also, 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 in the support body 32.

At this time, the number of magnet units 5U attached to the support 32 can be changed along the axial direction. Specifically, as shown in FIG. 11, a desired number of magnet units are provided along the axial direction from the axial end to the magnet unit mounting portions 321 formed on the outer peripheral surfaces of both ends in the axial direction of the support 32. After mounting 5U, the magnet unit 5U is attached by fixing the stationary-side pressing member 12 that presses the magnet unit 5U in the axial direction to the support 32. The stationary-side pressing member 12 presses the magnet unit 5U by receiving a pressing force from the screwing element 13 screwed to the support body 32.

FIG. 11 shows a case where four magnet units 5U are mounted. For example, when three magnet units 5U are mounted, the shape of the stationary-side pressing member 12 is changed in accordance with that, By interposing a spacer between the side pressing member 12 and the magnet unit 5U, the magnet unit 5U is pressed.

As described above, the number of the magnet units 4U of the rotation-side permanent magnet unit 4 and the number of the magnet units 5U of the stationary-side permanent magnet unit 5 are the use of the weight of the induction heat generating mechanism 31 and the support 32 or the number of rotations of the roller main body 2. Changed according to conditions.

Specifically, as shown in FIG. 12, 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.

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 the present embodiment, the rotation-side permanent magnet unit 4 and the stationary-side permanent magnet unit 5 have

magnet units

4U and 5U that are divided in the axial direction of the rotation axis C of the roller body 2, and the magnet unit. Since the number of 4U and 5U can be changed along the axial direction of the rotation axis C, the stationary member 3 with respect to the roller main body 2 according to usage conditions such as the load of the stationary member 3 and the rotation speed of the roller main body 2. It is possible to easily adjust the supporting force.

<Eighth Embodiment>
Next, an induction heating roller device 100 according to an eighth embodiment will be described.
In the induction heating roller device 100 of the eighth embodiment, the rotation-side permanent magnet unit 4 is rotated on both sides of the rotation-side permanent magnet unit 4U in the axial direction of the roller body 2, as shown in FIGS. A side yoke 4Y is provided. In addition, the stationary side permanent magnet portion 5 has stationary side yokes 5Y provided on both sides of the stationary side permanent magnet unit 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 magnet units 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 magnet units 4U.

Specifically, as shown in FIGS. 15 and 16, the rotation-side yoke 4Y has an annular shape, and has a contact surface portion 4Y1 that contacts the rotation-side permanent magnet unit 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 unit 4U. The contact surface portion 4Y1 is in contact with the entire circumferential direction on the side surface in the axial direction of the rotation-side permanent magnet unit 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 unit 4U.

Of the three rotation-side yokes 4Y of this embodiment, two rotation-side yokes 4Y located on both sides are configured to contact one rotation-side permanent magnet unit 4U (see FIG. 15), and are located at the center. The one rotating side yoke 4Y is configured to contact the two rotating side permanent magnet units 4U (see FIG. 16).

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 unit 4U, so that the polarity of the tip surface (inner surface) of the rotation-side yoke 4Y is increased. Is the S pole.

As shown in FIGS. 13 and 14, the stationary side yoke 5Y is provided on both sides of each of the plurality of stationary side permanent magnet units 5U. In the present embodiment, three stationary side yokes 5Y are provided on both sides of each of the two stationary side permanent magnet units 5U.

Specifically, as shown in FIGS. 15 and 16, the stationary side yoke 5Y has an annular shape, and has a contact surface portion 5Y1 in contact with the stationary side permanent magnet unit 5U on its inner diameter side portion. The outer diameter side portion has a separation surface portion 5Y2 that is separated from the stationary permanent magnet unit 5U. The contact surface portion 5Y1 contacts over the entire circumferential direction on the side surface in the axial direction of the stationary permanent magnet unit 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 unit 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 unit 5U (see FIG. 15), and are located in the center. One stationary side yoke 5Y is configured to come into contact with two stationary side permanent magnet units 5U (see FIG. 16).

In the present embodiment, the contact surface portion 5Y1 of the stationary yoke 5Y contacts the inner diameter side portion (S pole) of the stationary permanent magnet unit 5U, so that the polarity of the distal end surface (outer surface) of the stationary 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.

At this time, the numbers of the rotation-side permanent magnet units 4U and the rotation-side yoke 4Y attached to the rotation-side attachment member 9 can be changed along the axial direction. Specifically, as shown in FIG. 14, a desired number of rotation-side permanent magnet units 4U and rotation-side yoke 4Y are attached to the mounting portion 91 formed on the inner peripheral surface of the rotation-side mounting member 9 along the axial direction. After mounting, the rotation-side permanent magnet unit 4U and the rotation-side yoke 4Y are attached by fixing the rotation-side pressing member 10 that presses the rotation-side permanent magnet unit 4U and the rotation-side yoke 4Y in the axial direction to the rotation-side mounting member 9. It is done. At this time, the rotation-side pressing member 10 presses the rotation-side permanent magnet unit 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 unit 4U and the rotation-side yoke 4Y by being fixed to the rotation-side mounting member 9 by fastening elements 11 such as bolts.

FIGS. 13 and 14 show the case where the two rotation-side permanent magnet units 4U and the three rotation-side yokes 4Y are mounted at both ends in the axial direction, but other numbers of rotation-side permanent magnet units 4U are shown. When the rotation side yoke 4Y is mounted, the shape of the rotation side pressing member 10 is changed correspondingly, or a spacer is interposed between the rotation side pressing member 10 and the rotation side yoke 4Y, so that the rotation side permanent member is fixed. The magnet unit 4U and the rotation side yoke 4Y are pressed.

At this time, the number of stationary side permanent magnet units 5U and stationary side yokes 5Y attached to the support 32 can be changed along the axial direction. Specifically, as shown in FIG. 14, 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 unit 5U and the stationary side yoke 5Y are mounted, the stationary side permanent magnet unit 5U and the stationary side permanent magnet unit 5U and the stationary side yoke 5Y are fixed to the support body 32 by pressing the stationary side permanent magnet unit 5U and the stationary side yoke 5Y in the axial direction. The stationary side yoke 5Y is attached. The stationary-side pressing member 12 presses the stationary-side permanent magnet unit 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.

13 and 14 show a case where two stationary side magnet units 5U and three stationary side yokes 5Y are mounted at both axial ends, but other numbers of stationary side permanent magnet units 5U and When mounting the stationary side yoke 5Y, 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 The unit 5U and the stationary side yoke 5Y are pressed.

Thus, the number of the rotation-side permanent magnet units 4U and the rotation-side yokes 4Y of the rotation-side permanent magnet unit 4 and the number of the stationary-side permanent magnet units 5U and the stationary-side yokes 5Y of the stationary-side permanent magnet unit 5 are determined by the induction heating mechanism 31 And it changes according to use conditions, such as the weight of the support body 32, or the rotation speed of the roller body 2.

In particular, in this embodiment, since the rotation-side yoke 4Y and the stationary-side yoke 5Y are provided on both sides of the rotation-side permanent magnet unit 4U and the stationary-side permanent magnet unit 5U in the axial direction of the roller body 2, the rotation-side permanent magnet The magnetic force of the unit 4U and the stationary side permanent magnet unit 5U can be strengthened to increase the repulsive force thereof. 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 magnet units

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 magnet units 4U and the number of the stationary-side permanent magnet units 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 use conditions such as the number of rotations of the roller.

<Ninth Embodiment>
Next, an induction heat roller device 100 according to a ninth embodiment will be described.
In the induction heating roller device 100 according to the ninth embodiment, as shown in FIG. 17, the support 32 is fixed to a stationary member such as a machine base 62 by a fixing bracket 63 so as not to rotate.

In the induction heating roller device 100 of the present embodiment, as shown in FIG. 18 in particular, the magnet holder is interposed between the stationary member 3 and the stationary side permanent magnet unit 5 and holds the stationary side permanent magnet unit 5. 5X is provided.

The magnet holder 5X has a cylindrical shape that is mounted on a mounting portion 321 formed at the end of the support 32 in the axial direction, as shown in FIGS. The magnet holder 5X is attached to be swingable by fixing the stationary side pressing member 12 to the support body 32.

The stationary side permanent magnet portion 5 is provided over the entire circumferential direction on the outer peripheral surface of the magnet holder 5X. Specifically, the magnet holding body 5X has a rotating body shape, and an attachment recess 5X1 for attaching a plurality of stationary-side permanent magnets (magnet units 5U) in the axial direction is provided in the axial direction on the outer peripheral surface thereof. It is formed at equal intervals along. In addition, the convex part 5X2 located in the both sides of this attachment recessed part 5X1 becomes the stationary side yoke 5Y mentioned later.

The magnet holder 5X is attached to the mounting part 321 of the support 32 so that the stationary permanent magnet part 5 can swing with respect to the rotating permanent magnet part 4. Specifically, the magnet holder 5X is swingably attached so as to be inclined with respect to a plane including the rotation axis C of the roller body 2. As a result, the permanent magnet elements 5a to 5f constituting the magnet unit 5U of the stationary side permanent magnet part 5 with respect to the tip surfaces 41 of the permanent magnet elements 4a to 4f constituting the magnet unit 4U of the rotation side permanent magnet part 4 are arranged. The tip surface 51 can be inclined.

Specifically, a protrusion 5X3 that protrudes toward the outer peripheral surface of the mounting portion 321 is formed on the inner peripheral surface of the magnet holder 5X. The projecting portion 5X3 has an arc-shaped cross section along the axial direction of the roller body 2, and is continuously formed over the entire inner circumferential surface of the magnet holder 5X.

The protruding portion 5X3 is formed at the central portion in the axial direction of the magnet holder 5X. A plurality of stationary-side permanent magnets (magnet units 5U) are provided vertically symmetrically with respect to the axial center on the outer peripheral surface of the magnet holder 5X, and the protruding portion 5X3 has a plurality of magnet units 5U in the axial direction. It will be located in the center of. The inner diameter of the apex portion of the protruding portion 5X3 is slightly larger than the outer diameter of the mounting portion 321 and is attached with rattling.

In this configuration, as shown in FIG. 20, the magnet holder 5 </ b> X has the roller main body 2 in accordance with the bias of the magnetic repulsive force in the axial direction of the rotation axis C of the roller main body 2 and the bias of the magnetic repulsive force in the circumferential direction. It swings so that the central axis C ′ of the magnet holder 5X is inclined with respect to the rotation axis C.

In particular, in this embodiment, the magnet holder 5X that holds the stationary permanent magnet unit 5 is attached so that the stationary permanent magnet unit 5 can swing with respect to the rotating permanent magnet unit 4. The bias of the magnetic repulsion force generated between the rotation side permanent magnet part 4 and the stationary side permanent magnet part 5 can be reduced. Thereby, the stationary member 3 can be stably supported with respect to the roller body 2.

Further, by mounting the cylindrical magnet holder 5X on the mounting portion 321 of the support body 32, the stationary permanent magnet section 5 can be disposed in the entire circumferential direction of the support body 32. Attachment of the part 5 to the support body 32 can be facilitated. In addition, since the protrusion 5X3 is provided on the magnet holder 5X, the mounting portion 321 of the support 32 can be formed in an equal cross-sectional shape, and the processing can be facilitated.

<Other modified embodiments>
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.

The shapes of the plurality of permanent magnet elements 4a to 4d and 5a to 5d constituting one

magnet unit

4U and 5U may be different from each other. 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.

Further, in the plurality of

magnet units

4U and 5U, the shape of the permanent magnet elements 4a to 4d and 5a to 5d constituting one

magnet unit

4U and 5U, and the permanent magnet elements 4a to 4d constituting another

magnet unit

4U and 5U. The shapes of 5a to 5d may be different from each other. For example, in each of the

magnet units

4U and 5U, it can be considered that the thicknesses (axial dimensions) of the permanent magnet elements 4a to 4d and 5a to 5d are different from each other.

Further, in the ninth embodiment, the protrusion 5X3 is provided on the inner peripheral surface of the magnet holder 5X so as to be swingable. However, the protrusion is provided on the outer peripheral surface of the mounting portion 321, so that the swing is possible. It may be configured to be movable.

In the ninth embodiment, the protruding portion is not formed integrally with the magnet holder 5X or the mounting portion 321 but may be formed separately and fixed to the magnet holder 5X or the mounting portion 321. good. Further, the protruding portion may be formed intermittently in the circumferential direction in addition to the one formed in the entire circumferential direction. Furthermore, the cross-sectional shape of the tip of the protruding portion is not limited to an arc shape, and may be a curved surface shape or a bent shape as long as it can come into contact with the rocking portion.

According to the present invention, it is possible to suppress various problems caused by providing a rolling bearing between the roller body and the stationary member in the induction heating roller device.

Claims

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;
A rotation-side permanent magnet portion provided on the roller main body and the stationary member, disposed along the rotation axis of the roller main body and opposed to repel each other in a direction orthogonal to the rotation axis; A stationary permanent magnet part,
The induction heating roller device, wherein the stationary member is supported in a non-contact manner on the roller main body by the rotation-side permanent magnet portion and the stationary-side permanent magnet portion.
The roller body has a cylindrical shell portion, and a pair of journal portions provided at both ends of the shell portion,
The stationary member supports the induction coil, and has a support body provided inside the pair of one journal part and inside the other journal part,
The rotation-side permanent magnet part is provided in at least the one journal part,
The induction heating roller device according to claim 1, wherein the stationary permanent magnet portion is provided on the support.
The one journal side of the support is supported in a non-contact manner on the one journal by the rotating side permanent magnet part and the stationary side permanent magnet part,
The induction heat roller device according to claim 2, wherein the other journal side of the support is supported by an external support member fixed to the outside of the roller body.
The roller body has a cylindrical shell portion, and a pair of journal portions provided at both ends of the shell portion,
The stationary member supports the induction coil, and has a support body provided inside the pair of one journal part and inside the other journal part,
The rotation-side permanent magnet part is provided in the shell part,
The induction heating roller device according to claim 1, wherein the stationary permanent magnet portion is provided in the induction coil.
The rotation-side permanent magnet part or the stationary-side permanent magnet part has a plurality of magnet units configured to be divided in the axial direction of the rotation axis of the roller body,
The induction heating roller device according to claim 1, wherein the number of the magnet units is configured to be changeable along an axial direction of the rotation shaft.
6. The induction heat roller device according to claim 5, wherein the magnet unit is composed of a plurality of permanent magnet elements provided radially in a plane orthogonal to the rotation axis.
The stationary member has a support for supporting the induction coil,
The stationary permanent magnet unit has the magnet unit,
The induction heating roller device according to claim 5, wherein the magnet unit of the stationary-side permanent magnet portion can be changed along the axial direction by being mounted from an axial end portion of the support.
The roller body has a cylindrical shell portion, and a pair of journal portions provided at both ends of the shell portion,
The rotation-side permanent magnet portion has the magnet unit,
6. The induction heating roller device according to claim 5, wherein the magnet unit of the rotation-side permanent magnet portion can be changed along the axial direction by being attached to a rotation-side attachment member attached to the journal portion.
A rotation-side yoke and a stationary-side yoke provided on both sides of each of the rotation-side permanent magnet portion and the stationary-side permanent magnet portion in the axial direction of the roller body, and arranged to face each other in a direction perpendicular to the rotation axis; The induction heating roller device according to claim 1, comprising:
A plurality of the rotation side permanent magnet part and the stationary side permanent magnet part are provided along the axial direction,
The rotation side yoke is provided on both sides of each of the plurality of rotation side permanent magnet parts,
The induction heating roller device according to claim 9, wherein the stationary side yoke is provided on both sides of each of the plurality of stationary side permanent magnet portions.
The induction heating roller device according to claim 10, wherein the number of the rotation-side permanent magnet portions and the number of the stationary-side permanent magnet portions can be changed along the axial direction of the rotation shaft.
The induction heating roller device according to claim 9, wherein the rotation-side permanent magnet portion and the stationary-side permanent magnet portion are composed of a plurality of permanent magnet elements provided radially on a plane orthogonal to the rotation axis.
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 as described.
A magnet holder interposed between the stationary member and the stationary side permanent magnet part and holding the stationary side permanent magnet part;
The induction heat roller device according to claim 1, wherein the magnet holder is attached so that the stationary permanent magnet portion can swing with respect to the rotating permanent magnet portion.
The magnet holder has a cylindrical shape that is mounted on the mounting portion of the stationary member,
The induction heat roller device according to claim 14, wherein the stationary permanent magnet portion is provided over the entire circumferential direction of the magnet holder.
Either one of the opposing surfaces of the magnet holder and the mounting portion has a protruding portion that protrudes toward the other opposing surface,
The induction heating roller device according to claim 15, wherein the other opposing surface is in contact with the protruding portion and is swingable.
A plurality of stationary side permanent magnet portions are provided along the axial direction of the roller body on the outer peripheral surface of the magnet holder,
The induction heating roller device according to claim 16, wherein the protruding portion is located at a central portion of the stationary permanent magnet portion in the axial direction.
A rotation-side yoke and a stationary-side yoke provided on both sides of each of the rotation-side permanent magnet portion and the stationary-side permanent magnet portion in the axial direction of the roller main body and arranged to face each other in a direction orthogonal to the axial direction; The induction heating roller device according to claim 14.
The induction heating roller device according to claim 18, wherein the rotation-side yoke and the stationary-side yoke are provided on the magnet holder.