JP2019112694A - High frequency induction heating apparatus - Google Patents

Abstract

To uniformly heat an entire work in a high frequency induction heating device, and to simplify its constitution.SOLUTION: The high frequency induction heating apparatus has two heating coils 22,23 arranged along the conveying direction in both sides in the lateral direction orthogonal to the conveying direction of a workpiece W. This apparatus includes: a support body 15 supporting a work W, moving in the conveyance direction, and turning about a first pivot axis 15a orthogonal to the lateral direction; a rotary support mechanism 14 having a rotary body 16 which moves in the conveying direction together with the support body 15 and rotates about a second pivot axis 16a orthogonal to the lateral direction; and an engaging member 17 arranged along the conveying direction so as to engage with the rotary body 16. The rotary body 16 is rotated by being moved in the conveying direction together with the support body 15 while being engaged with the engaging member 17, and the support body 15 rotates in accordance with the rotation of the rotary body 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high frequency induction heating apparatus configured to perform high frequency induction heating while conveying a work.

  A workpiece made of metal, in particular steel, may be subjected to hardening for hardening, and in addition, the workpiece may be tempered to give toughness. There is. For example, in tempering, a quenched work is heated for a certain period of time, and then the work is cooled. In order to heat the work in heat treatment such as tempering, the high frequency induction is performed by continuously heating the work by a high frequency induction heating coil (hereinafter referred to simply as a "heating coil" if necessary) while conveying the work by a conveyor A heating device (hereinafter simply referred to as a "heating device" as necessary) is used.

  Generally, the heating device has a conveying surface on which the workpiece is placed, and a conveyor for conveying the workpiece on the conveying surface, high frequency induction heating of the workpiece to be conveyed, and the conveyance direction of the workpiece relative to the conveyor And two heating coils respectively disposed on both sides in the width direction orthogonal to However, in such a heating device, when the work passes between the two heating coils, the outer portion of the work approaching the heating coil in the width direction of the conveyor and the heating coil in the width direction of the conveyor are apart A difference occurs in the temperature heated by the heating coil with the central portion of the work.

  Therefore, in order to heat the workpiece uniformly, for example, in Patent Document 1, the workpiece is rotated at a predetermined angle around an axis extending perpendicularly to the transport surface in a state where the transport of the workpiece is stopped. A heating device has been proposed that is configured to change the orientation of and then resume the transfer of the workpiece.

  Moreover, a heating apparatus may have a cooling unit which cools by air blow etc., conveying a workpiece | work by a conveyor. Such a heating device typically includes a heating conveyor passing through a heating section performing heating by a heating coil, and a cooling conveyor passing through a cooling section performing cooling by a cooling unit. Such a heating apparatus may require a pusher for moving the work on the heating conveyor onto the cooling conveyor. Moreover, in such a heating device, the heating conveyor and the cooling conveyor may be disposed on a straight line.

JP, 2013-155400, A

  However, in the heating device of Patent Document 1, the posture of the workpiece is maintained constant while the workpiece is being transported before and after the workpiece is rotated. During such work transfer, the temperature heated by the heating coil still differs between the outer portion of the work and the central portion of the work, and the work heating is biased. Therefore, it is desirable to eliminate such a temperature difference and to heat the whole work more uniformly.

  Since the mechanism for rotating the workpiece is complicated, it is desirable to simplify the configuration for uniformly heating the entire workpiece. Since the configuration of the pusher is also complicated, it is desirable to simplify the configuration for transferring the work between the section in which the heating coil heats and the section in which the cooling unit cools. Consequently, it is desirable to simplify the configuration of the heating device.

  In addition, due to the above-described stop of the conveyor at the time of rotation of the workpiece and the uneven heating of the workpiece, the heating time of the workpiece tends to be long. Furthermore, when the heating device is provided with a pusher, and when the heating conveyor and the cooling conveyor are arranged in a straight line in the heating device, the heating device becomes larger, which in turn increases the manufacturing cost of the heating device. There is a fear.

  In consideration of the above situation, in the high frequency induction heating apparatus, it is desirable to uniformly heat the entire work and to simplify the configuration of the high frequency induction heating apparatus. In addition, it is desirable to shorten the heating time of the work, to miniaturize the heating device, and to reduce the manufacturing cost of the heating device, as compared with the prior art.

  In order to solve the above-mentioned subject, the high frequency induction heating device concerning one mode of the present invention is provided with two heating bodies which carry out high frequency induction heating of the work conveyed, and the two heating bodies are the above-mentioned work to the above-mentioned work. A high frequency induction heating device disposed on both sides in the lateral direction orthogonal to the transport direction of the workpiece and disposed along the transport direction, supporting the work, moving in the transport direction, and the lateral direction A support pivoting about a first pivot axis perpendicular to the axis, and a rotation moving along the transport direction with the support and pivoting about a second pivot axis orthogonal to the lateral direction A rotary support mechanism having a body, and an engagement member disposed along the transport direction so as to engage with the rotation body, the rotation body engaging the engagement member with the support Move in the transport direction with Pivoted by Rukoto, the support with the turning of the rotary member is adapted to pivot.

  According to the high frequency induction heating device according to one aspect of the present invention, the entire work can be uniformly heated, and the configuration of the high frequency induction heating device can be simplified.

It is a perspective view showing roughly the high frequency induction heating device concerning the embodiment of the present invention. It is a top view showing roughly the high frequency induction heating device concerning the embodiment of the present invention. It is a perspective view showing roughly a conveyance unit concerning an embodiment of the present invention. It is a perspective view showing roughly a rotation support mechanism and a conveyor concerning an embodiment of the present invention. It is a perspective view which shows roughly the rotation support mechanism and engaging member which concern on embodiment of this invention. It is a perspective view showing roughly a heating unit concerning an embodiment of the present invention.

  The high frequency induction heating apparatus (hereinafter, simply referred to as a "heating apparatus") according to the embodiment of the present invention will be described below. In the present embodiment, the heating device is described as being configured to be heatable so as to perform tempering of the work. However, the heating apparatus of the present invention may be used for quenching, annealing, normalizing, etc., of a workpiece other than tempering of the workpiece. Further, the heating device of the present invention may be configured to be heatable so as to dry the adhesive, the paint and the like applied to the work.

[About the outline of the heating device]
First, the outline of the heating apparatus will be described with reference to FIGS. 1 and 2. The heating device includes a transport unit 1 configured to transport the workpiece W, and two heating coils 22 and 23 configured as two heating bodies for performing high frequency induction heating on the workpiece W transported by the transport unit 1. The heating unit 2 includes at least one heating coil assembly 21 and the cooling unit 3 configured to cool the workpiece W transported by the transport unit 1. The transport direction and the lateral direction are preferably horizontal. Further, it is preferable that the workpiece W be formed substantially rotationally symmetric about the central axis w1. However, in the present invention, the workpiece may be formed in a shape other than rotational symmetry.

  In the present embodiment, as an example, the case where the heating unit 2 includes three heating coil assemblies 21 will be described. The two heating coils 22 and 23 of each heating coil assembly 21 substantially correspond to the conveying direction (indicated by an arrow T) with respect to the work W in a first section R1 (indicated by a broken line in FIG. 2) described later. Are arranged along the transport direction on both sides of the transverse direction (indicated by the arrow S) orthogonal to Furthermore, the heating coils 22 and 23 are arranged at intervals in the lateral direction with respect to the work W. Further details of the heating unit 2 will be described later.

[About the details of the transport unit]
Next, details of the transport unit 1 will be described with reference to FIGS. 1 to 5. As shown in FIGS. 1-5, the transport unit 1 has a conveyor 11 configured to move in the transport direction. The conveyor 11 is configured to move circumferentially along the loop shape, and the direction of the circumferential movement of the conveyor 11 is the transport direction. The conveyance unit 1 can adopt any configuration as long as it can move the conveyor 11 in the conveyance direction, but in the present embodiment, as an example, the conveyance unit 1 relates to the movement of the conveyor 11 as follows. Shall be configured.

  As shown in FIGS. 3 and 4, the loop-shaped conveyor 11 has a plurality of engagement holes 11 a recessed from its inner periphery toward its outer periphery. The plurality of engagement holes 11a are spaced from each other in the transport direction. In the present embodiment, as an example, the conveyor 11 has a chain structure.

  As shown in FIGS. 2 and 3, the transport unit 1 has one drive mechanism 12 configured to effect the movement of the conveyor 11. The drive mechanism 12 may have a drive engagement portion 12 b pivotable about a drive axis 12 a substantially perpendicular to the transport direction. Preferably, the drive axis 12a extends substantially vertically. The drive engagement portion 12b is formed substantially rotationally symmetric about the drive axis 12a. The drive engagement portion 12 b has a plurality of engagement teeth 12 c protruding in the inner and outer circumferential directions on the outer periphery thereof. The plurality of engagement teeth 12c are substantially equally spaced in the circumferential direction of the drive engagement portion 12b. The drive engagement portion 12b is preferably a sprocket. The drive engagement portion 12 b is also disposed on the inner peripheral side of the conveyor 11. With the engagement teeth 12c of the drive engagement portion 12b engaged with the engagement holes 11a of the conveyor 11, the drive engagement portion 12b is rotationally driven to move the conveyor 11 in the transport direction.

  The transport unit 1 has a plurality of guide mechanisms 13 for guiding the movement of the conveyor 11. The guide mechanism 13 may have a guide engaging portion 13 b pivotable about a guide axis 13 a substantially perpendicular to the transport direction. The guide axis 13a preferably extends substantially vertically. The guide engaging portion 13b is formed substantially rotationally symmetric about the guide axis 13a. The guide engaging portion 13 b has a plurality of engaging teeth 13 c protruding in the inner and outer circumferential directions on the outer periphery thereof. The plurality of engagement teeth 13c are substantially equally spaced in the circumferential direction of the guide engagement portion 13b. The guide engaging portion 13b is preferably a sprocket. The guide engaging portion 13 b is disposed on the inner peripheral side of the conveyor 11. In a state in which the engaging teeth 13c of the guide engaging portion 13b are engaged with the engaging holes 11a of the conveyor 11, the guide engaging portion 13b guides the movement of the conveyor 11 while turning.

  For example, in the transport unit 1, when the conveyor 11 is installed so as to form a substantially square shape in plan view, one drive mechanism 12 and three guide mechanisms 13 are each substantially square conveyors It may be arranged at four corners of eleven. In this case, since the conveyor 11 can be efficiently moved by one drive mechanism 12, the configuration for moving the conveyor 11 can be simplified.

  Next, as shown in FIGS. 1 to 5, the transport unit 1 is configured to transport the workpiece W while turning it in a first section R1 which is at least a part of the transport sections along the conveyor 11. And a plurality of rotary support mechanisms 14. The details of the first section R1 will be described later. The plurality of rotary support mechanisms 14 are spaced from one another in the transport direction. Specifically, the plurality of rotation support mechanisms 14 are spaced from one another in the circumferential direction of the conveyor 11 and attached to the conveyor 11. The transport unit may be configured to have one rotation support mechanism.

  As shown in FIGS. 3 to 5, each rotary support mechanism 14 supports the work W and supports 15 pivoted about a first pivot axis 15a substantially orthogonal to the lateral direction, And a rotating body 16 pivoting about a second pivoting axis 16a substantially orthogonal to the direction. In particular, it is preferable that the support 15 support the work W so that the central axis w1 of the work W substantially matches the first pivot axis 15a. The support 15 is disposed above the rotating body 16. The first and second pivot axes 15a, 16a extend substantially vertically, and the first pivot axis 15a substantially coincides with the second pivot axis 16a.

  As shown in FIGS. 4 and 5, the support 15 has a support 15 b for supporting the work W, and a connecting part 15 c for connecting the support 15 b to the rotating body 16. The support portion 15 b is disposed above the connection portion 15 c. The work W is placed on the upper surface of the support portion 15 b. The connecting portion 15 c extends from the support portion 15 b toward the rotating body 16 along the first pivot axis 15 a.

  The rotary body 16 has a rotary engagement portion 16b formed substantially rotationally symmetric about the second pivot axis 16a. The rotation engagement portion 16 b has a plurality of engagement teeth 16 c protruding in the inner and outer circumferential directions on the outer periphery thereof. The plurality of engagement teeth 16 c are substantially equally spaced in the circumferential direction of the rotational engagement portion 16 b. The rotational engagement portion 16 b is coupled to the coupling portion 15 c of the support 15. Preferably, the rotational engagement portion 16 b is a sprocket.

  The rotating body 16 also has a bearing portion 16d that provides a pivot about the second pivot axis 16a. The rotational engagement portion 16 b is disposed closer to the support 15 with respect to the bearing portion 16 d. Here, the rotational engagement portion 16b is disposed above the bearing portion 16d. The bearing portion 16 d is attached to the conveyor 11 so that the rotary body 16 can pivot relative to the conveyor 11 about the second pivot axis 16 a.

  Furthermore, as shown in FIGS. 1 to 3 and 5, the transport unit 1 has an engagement member 17 extending in the transport direction in the first section R1 (indicated by a broken line in FIG. 2). As shown in FIG. 5, the engagement member 17 has a plurality of engagement holes 17 a recessed so as to be engageable with the engagement teeth 16 c of the rotational engagement portion 16 b of the rotary member 16. The plurality of engagement holes 17a are spaced from one another in the transport direction. The engagement member 17 is disposed to substantially coincide with the rotation engagement portion 16b of the rotary member 16 in the direction along the second pivot axis 16a, and the engagement hole 17a is rotated in the lateral direction. It is arrange | positioned so that the engagement tooth 16c of the joint part 16b may be engaged. In the present embodiment, the engagement member 17 is disposed on the inner peripheral side of the conveyor 11. However, the engagement member of the present invention is not limited to this, and may be disposed on the outer peripheral side with respect to the conveyor. The engagement member 17 is preferably a chain structure.

  Therefore, with the engagement teeth 16c of the rotational engagement portion 16b of the rotary member 16 engaged with the engagement holes 17a of the engagement members 17 in the first section R1, the movement of the conveyor 11 in the transport direction is The rotating body 16 moves together with the support 15 in the transport direction, as a result of which the rotating body 16 pivots about the second pivot axis 16a, and further pivoting of the rotating body 16 causes the support 15 to move It pivots around the first pivot axis 15a together with the work W to be supported. That is, the rotating body 16 moves in the transport direction while pivoting about the second pivot axis 16a, and as a result, the support 15 pivots about the first pivot axis 15a together with the work W supported thereon While moving in the transport direction.

[About the details of the heating unit]
Details of the heating unit 2 will be described with reference to FIGS. 1, 2 and 6. As shown in FIG. 6, in each heating coil assembly 21 of the heating unit 2, the two heating coils 22 and 23 extend in the transport direction in the first section R <b> 1. However, in the present invention, each heating body may be configured as a plurality of heating coils spaced from each other in the transport direction.

  Furthermore, one of the two heating coils 22 and 23 (hereinafter referred to as “one side heating coil” if necessary) 22 is disposed on the inner peripheral side with respect to the conveyor 11 in plan view, and the two heating coils The other 23 (hereinafter, referred to as “the other side heating coil” as necessary) of 22 and 23 is disposed on the outer peripheral side with respect to the conveyor 11 in plan view. The two heating coils 22, 23 are mutually opposed in the lateral direction and are spaced apart from one another. The two heating coils 22 and 23 are spaced apart from the conveyor 11 in the direction of the first pivot axis 15 a of the support 15. The workpiece W transported by the conveyor 11 is configured to pass through the space formed between the two heating coils 22 and 23 in the first section R1, and when the workpiece W passes through the space The high frequency induction heating is performed by the two heating coils 22 and 23.

  As shown in FIG. 2, such two heating coils 22 and 23 are arranged in parallel to the engagement member 17. The length L1 of the engaging member 17 in the transport direction is equal to or greater than the lengths L2 and L3 of the heating coils 22 and 23 in the transport direction.

  Referring again to FIGS. 1, 2 and 6, at least one heating coil assembly 21 is configured to automatically or manually move one and the other heating coils 22, 23, respectively. There are two moving mechanisms 24. The moving mechanism 24 may adopt any configuration as long as it is configured to move the two heating coils 22 and 23 together or separately in the lateral direction, but in particular, the moving mechanism 24 Preferably, it is configured.

  As shown in FIG. 6, the heating coil assembly 21 may have two moving mechanisms 24. Each moving mechanism 24 is capable of slidingly moving one and the other side attachment members 24a and 24b attached to the one and the other side heating coils 22 and 23, and one and the other side attachment members 24a and 24b, respectively. As shown in FIGS. 1 and 2, a laterally moving member 24c for supporting and a longitudinally moving member 24d for slidably supporting the laterally moving member 24c in a longitudinal direction (indicated by arrow V) substantially orthogonal to the lateral direction. And. In particular, the two moving mechanisms 24 may be spaced apart from each other in the transport direction. The one side attachment members 24 a of the two movement mechanisms 24 are respectively attached to both end portions in the longitudinal direction of the one side heating coil 22, and the other side attachment members 24 b of the two movement mechanisms 24 are respectively long sides of the other side heating coil 23. It should be attached to both ends of the direction. In the heating coil assembly 21, the one side heating coil 22 and the other heating coil 22 are in the lateral direction (indicated by the arrow S in FIGS. 1 and 2) with respect to the first and second pivot axes 15a 16a. It is preferable to move substantially symmetrically to each other.

  As shown in FIG. 1, FIG. 2 and FIG. 6, the heating unit 2 comprises three heating coil assemblies (hereinafter referred to as "first, second and third heating coil In the case where the first heating coil assembly 21 includes the first heating coil assembly 21, the first heating coils 22 are spaced apart from each other in the vertical direction (indicated by the arrow V) substantially orthogonal to the horizontal direction in the first section R1. It is better if they are parallel to each other. The other heating coils 23 of the first to third heating coil assemblies 21 may also be spaced apart from one another in the longitudinal direction, and may also be parallel to one another. The longitudinal direction may be substantially parallel to the first pivot axis 15 a of the support 15, and the longitudinal direction may preferably be substantially vertical. Also, the two moving mechanisms 24 in the first heating coil assembly 21 may be disposed closer to the center of the heating unit 2 in the transport direction than the two moving mechanisms 24 in the second heating coil assembly 21, respectively. The two moving mechanisms 24 in the two heating coil assembly 21 may be disposed closer to the center of the heating unit 2 in the transport direction than the two moving mechanisms 24 in the third heating coil assembly 21.

[About the details of the cooling unit]
The details of the cooling unit 3 will be described with reference to FIGS. 1 and 2. The cooling unit 3 can adopt any configuration as long as it can cool the work W transported by the transport unit 1, but in particular, the cooling unit 3 is preferably configured as follows.

  The cooling unit 3 cools the workpiece W by spraying a cooling mechanism 31 configured to cool the workpiece W by spraying cooling water onto the workpiece W being transported, and spraying the air onto the workpiece W being transported. And a drainage mechanism 32 configured to blow off the cooling water adhering to the workpiece W. The cooling mechanism 31 is located upstream of the drainage mechanism 32 in the transport direction. In FIG. 2, the cooling mechanism 31 and the drainage mechanism 32 are shown by imaginary lines.

[Details of transport section]
The details of the transport section will be described with reference to FIG. The transport section has the first section R1 (indicated by a broken line in FIG. 2) for transporting the workpiece W while turning it, as described above. The engagement member 17 of the transport unit 1 and the heating unit 2 are disposed in the first section R1. In particular, in the first section R1, the conveyor 11 preferably extends substantially linearly, in which case the engagement member 17 and the two heating coils 22 and 23 extend substantially linearly along the conveyor 11. preferable.

  The transport section also includes a second section R2 (indicated by a broken line in FIG. 2) located downstream of the first section R1 in the transport direction, and an upstream side of the first section R1 in the transport direction and the second A third section R3 (indicated by a broken line in FIG. 2) located on the downstream side in the transport direction with respect to the section R2 is provided. The cooling unit 3 is disposed in the second section R2. In the third section R3, the workpiece W before the high frequency induction heating processing can be introduced into the heating device, and the workpiece W after the high frequency induction heating processing can be taken out from the heating device.

  As described above, in the heating device according to the present embodiment, the workpiece W is conveyed while being pivoted about the first pivot axis 15a of the support 15 substantially orthogonal to the lateral direction, so that the workpiece W is being conveyed. The entire work W can be uniformly heated by the two heating coils 22 and 23 positioned on both sides in the lateral direction with respect to the work W. Furthermore, since the work W is turned by a simple structure such as the rotation support mechanism 14 having the support 15 and the rotation body 16 and the engaging member 17, the structure for uniformly heating the entire work W is simplified. The configuration of the heating device can be simplified. Moreover, since the heating bias of the workpiece W which turns during conveyance is smaller than the heating bias of the workpiece which does not turn during conveyance, in the present embodiment, the workpiece W can be heated more quickly than in the conventional case. As a result, the workpiece W can be efficiently heated even with a short transport distance as compared with the conventional case, and the lengths of the conveyor 11 and the heating coils 22 and 23 in the transport direction can be shortened. Therefore, the heating time of the workpiece W can be shortened, the heating device can be miniaturized, and the manufacturing cost of the heating device can be reduced as compared with the conventional case.

  In the heating device according to the present embodiment, the engagement members 17 are disposed in parallel to the two heating coils 22 and 23, and the length L1 of the engagement members 17 in the conveyance direction is the conveyance of the heating coils 22 and 23. Since the length L2 in the direction or more is L3, the work W can be transported while being turned in the entire first section R1 in which the work W is heated by the two heating coils 22 and 23. Thus, the entire workpiece W can be uniformly heated while the workpiece W is being transported.

  In the heating device according to the present embodiment, the plurality of rotation support mechanisms 14 are arranged at intervals in the transport direction, and each rotation support mechanism 14 moves the support 15 and the rotating body 16 to the conveyor 11. Since it is attached to the conveyor 11 so as to be pivotable and is moved in the transport direction by the movement of the conveyor 11, the rotation support mechanism 14 having the support 15 and the rotation body 16, the engagement member 17, and The workpiece W can be conveyed while being rotated by a simple configuration such as the conveyor 11. Therefore, the configuration for heating the entire workpiece W uniformly can be simplified, and the configuration of the heating device can be simplified.

  In the heating device according to the present embodiment, the work W is cooled by the cooling unit 3 in the first section R1 for performing high-frequency induction heating using the two heating coils 22 and 23 by the conveyor 11 in one loop shape. It can be transported to pass through the second section R2 to be performed. Furthermore, in the heating device, a drive mechanism 12 for driving one conveyor 11 may be provided. Therefore, as in the prior art, there are two conveyors passing through a section performing high frequency induction heating using heating coils and a section performing cooling by a cooling unit, a drive unit for driving these two conveyors, and a pusher device Compared with the conventional heating device which has these, the heating device concerning this embodiment can simplify the composition. Furthermore, as compared with the prior art, the heating device can be miniaturized, and the manufacturing cost of the heating device can be suppressed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on the technical idea thereof.

  Reference Signs List 3 cooling unit, 11 conveyor, 14 rotation support mechanism, 15 support body, 15a first rotation axis, 16 rotation body, 16a second rotation axis, 17 engagement member, 22 one side heating coil, 23 other side heating coil, W Work, R1 first section, R2 second section, L1, L2, L3 length, T, S, V Arrow

Claims (4)

It has two heating elements for high frequency induction heating of the workpiece being transported,
The high-frequency induction heating apparatus according to claim 1, wherein the two heating members are disposed on both sides in a lateral direction orthogonal to the conveyance direction of the work with respect to the work, and are disposed along the conveyance direction.
A support that supports the workpiece, moves in the transport direction, and pivots about a first pivot axis orthogonal to the lateral direction, and moves in the transport direction together with the support, and A rotary support mechanism having a rotary body pivoting about a second pivot axis orthogonal to the lateral direction;
An engaging member disposed along the transport direction to engage the rotating body;
The rotating body pivots by moving in the transport direction with the support while engaging the engagement member;
The high frequency induction heating device, wherein the support pivots as the rotary body pivots. The engagement member is disposed in parallel to the two heating members,
The high frequency induction heating apparatus according to claim 1, wherein the length of the engagement member in the conveyance direction is equal to or greater than the length of the conveyance direction of each heating body. It further comprises a conveyor that moves in the transport direction,
A plurality of said rotary support mechanisms being spaced apart from one another in said transport direction;
Each rotary support mechanism is mounted on the conveyor so as to be able to pivot its support and rotor relative to the conveyor, and is adapted to move in the transport direction by movement of the conveyor. The high frequency induction heating device according to 1 or 2. It further comprises a cooling unit for cooling the work,
The conveyor is formed in a loop shape and configured to move around along the loop shape,
The plurality of rotary support mechanisms and the conveyor are configured to pass through the cooling unit,
The two heating members and the engagement member are disposed in a first section which is a part of a conveyance section along the conveyor.
The high-frequency induction heating apparatus according to claim 3, wherein the cooling unit is disposed in a second section which is a part of the transport section and is located downstream of the first section in the transport direction.

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