KR101712550B1 - Induction heating device - Google Patents

Abstract

An induction heating apparatus for suppressing excessive heating of an edge portion without significantly lowering heating efficiency is provided. An induction heating apparatus for heating a sheet-shaped object to be heated, the induction heating apparatus comprising: a first heating coil formed substantially in the root symbol shape; and a second heating coil formed substantially in a root symbol shape and electrically connected to the first heating coil, A first space is formed to intersect near an edge portion of the thin plate-like object to be heated in an area not electrically connected to each other, and a second space is formed in a region where the thin plate- And the first heating coil and the second heating coil are disposed substantially parallel to the thin plate-like object to be heated, and at least one of the first heating coil and the second heating coil is disposed in the feeding direction of the thin plate- And the movable heating coil is moved so that only the first space is enlarged or reduced. In the first space, the second space, and the third space, So that the generated magnetic flux is in the opposite direction.

Description

{Induction Heating Device}

More particularly, the present invention relates to an induction heating apparatus, and more particularly, to an induction heating apparatus in which an object to be heated (hereinafter referred to as a " object to be heated " And more particularly to an induction heating apparatus used for heating an induction heating apparatus.

Generally, in the case of induction heating of a thin plate shaped article to be heated of a magnetic material, it is heated using an induction heating apparatus provided with a so-called tunnel coil as a heating coil.

However, in the induction heating apparatus provided with such a tunnel-type coil, in the case of induction heating of the thin plate-like object to be heated of the non-magnetic material, induction generated in each of the front surface (front surface) The current was canceled, and it was not possible to heat it.

For this reason, in the case of induction heating of the sheet-like material to be heated of the nonmagnetic material, heating is carried out by using an induction heating apparatus equipped with a so-called transverse coil as a heating coil.

Here, as an example of the above-described induction heating apparatus having a transverse coil, a heating coil formed in a substantially rectangular shape parallel to the thin plate-like object to be fed is provided, and on the upper side or the lower side of the heating coil (Refer to Fig. 1 (a)). In this method, the object to be heated is heated by transferring the object to be heated to a thin plate shape.

However, in such an induction heating apparatus, the heating coil is fixedly formed in a substantially rectangular shape.

Therefore, when the width L1 in the width direction of the heating coil is equal to or larger than the width W1 of the thin plate-like object to be heated which is conveyed to the upper side or the lower side of the heating coil, The induced current is concentrated on the edge portion, and the edge portion is excessively heated (refer to Fig. 1 (a)).

As a method for solving such a problem, a technique disclosed in Patent Document 1 is known.

That is, in the technique disclosed in Patent Document 1, a heating coil (hereinafter, referred to as a "V-shaped heating coil") of a substantially V-shape is slid to a heating coil of substantially M- The size of the first space formed by the V-shaped heating coil and the M-shaped heating coil is adjusted in accordance with the width of the thin plate-shaped object to be heated, and the thin plate- (See Fig. 1 (b)).

Further, in the case of adjusting the size of the first space formed by the V-shaped heating coil and the M-shaped heating coil according to the width of the thin plate-shaped heating object, the first space formed by the V- A second space and a third space are formed adjacent to each other (adjacent in the width direction of the sheet-like object to be heated).

The second space and the third space are reduced when the first space is enlarged, and enlarged when the first space is reduced.

In the second space and the third space, a magnetic flux is generated in the direction opposite to the magnetic flux generated in the first space.

Therefore, in the vicinity of the edge portion of the sheet-shaped object to be heated, the edge portion of the sheet-like object to be heated which is excessively heated by the magnetic flux generated in the first space is smoothened by the magnetic flux generated in the second space and the third space, The eddy current in the reverse direction is induced, so that the edge portion is not heated excessively.

However, in the technique disclosed in Patent Document 1, when the width of the thin plate-like object to be heated becomes small, the first space is reduced, and the amount of heating to the thin plate-like object to be heated by the magnetic flux generated in the first space is reduced .

Further, when the width of the thin plate-like object to be heated becomes small, the eddy current induced by the magnetic flux generated in the first space and the second space and the third space generating the magnetic flux inducing the eddy current in the opposite direction are enlarged, Resulting in further reduction in the heating amount in the heated product.

For this reason, with the technique disclosed in Patent Document 1, if the width of the material to be heated is reduced, the heating efficiency of the material to be heated is reduced.

Japanese Patent Application Laid-Open No. 2010-245029

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a thin plate- And an excessive heating at an edge portion of the object to be heated to be thin can be suppressed.

In order to attain the above object, the present invention provides an induction heating apparatus for induction heating a thin plate-shaped object to be heated by supplying a high-frequency current from a high frequency power source to a heating coil, wherein a first protrusion is formed on the other end side, A first heating coil formed in a symbol shape and connected to the high frequency power source at one end portion thereof and a second protrusion portion formed at the other end side thereof so as to be formed in a substantially root symbol shape and connected to the high frequency power source Wherein at least one of the first heating coil and the second heating coil has a second heating coil in a predetermined direction orthogonal to the conveying direction of the thin plate shaped object to be heated or in a direction inclined with respect to the predetermined direction And the first heating coil and the second heating coil are provided so as to be substantially parallel to the thin plate- Wherein the first heating coil and the second heating coil are electrically connected only to one end side of the second heating coil, and the first projection and the second projection are provided so as to protrude in mutually opposite directions, and the first heating coil and the second heating coil are not electrically connected The first space is formed in a substantially square shape so as not to be electrically connected to the vicinity of the edge portion of the thin plate-like object to be heated, and at the same time, the first space outside the first space Wherein a magnetic flux generated by a high-frequency current flows in a reverse direction in the first space, the second space, and the third space, and the first heating coil and the second heating coil By moving at least one movable member movable relative to the two heating coils, the first space is enlarged or reduced in the predetermined direction, And the third space is not enlarged or reduced.

Further, the present invention is characterized in that, in the above-described invention, the other end side of the first heating coil is movably provided in contact with one end side of the second heating coil.

Further, according to the present invention, in the above-described invention, further, there is provided a pressurizing means for pressing at least one of the other end side of the first heating coil and one end side of the second heating coil, When at least one of the heating coil and the second heating coil moves, the first heating coil and the second heating coil are not electrically connected to each other without being pressurized by the pressing means, After the movement of at least one of the first heating coil and the second heating coil is completed, the first heating coil and the second heating coil are pressurized by the pressurizing means so that the first heating coil and the second heating coil are electrically connected to each other have.

Further, according to the present invention, in the above-described invention, a first long hole is formed on the other end side of the first heating coil, a second long hole is formed on one end side of the second heating coil, And wherein when at least one of the first heating coil and the second heating coil moves, a screw is not inserted into the first elongated hole and the second elongated hole, and the first heating coil and the second heating coil are not in electrical contact And after the movement of at least one of the first heating coil and the second heating coil is completed, a screw is inserted into the first elongated hole and the second elongated hole, and the first heating coil and the second heating coil Are electrically connected to each other.

In addition, the present invention is characterized in that, in the above-described invention, a plate-shaped member formed of a metal exhibiting conductivity and provided at a predetermined distance from the other end side of the first heating coil and one end side of the second heating coil And a pressing means for pressing the plate-like member, wherein when at least one of the first heating coil and the second heating coil moves, the pressing by the pressing means is not performed, and the first heating After the movement of at least one of the first heating coil and the second heating coil is completed, pressing by the pressing means is performed so that the plate shape And the first heating coil and the second heating coil are electrically connected to each other through a member.

According to the present invention, in the above-described invention, the first protrusion has a shape bent at an acute angle with the first attachment as a vertex, and the second space is formed into a substantially triangular shape having the first attachment as one vertex The second protrusion is formed at an acute angle with the second attachment point as an apex, and the third space is formed in a substantially triangular shape having one apex as the second attachment.

Further, the present invention is characterized in that, in the above-described invention, the first heating coil and the second heating coil are gently bent to form a root symbol shape.

Further, the present invention is characterized in that the above-mentioned invention further has a plate-like magnetic material provided so as to cover an area where the first space is formed.

Further, in the present invention, in the above-described invention, the magnetic material is formed by arranging a plurality of magnetic members extending in the conveyance direction of the sheet-like object to be heated in the width direction of the sheet-like object to be heated.

Since the present invention is configured as described above, even in the case of a thin plate-like object to be heated having a small width, it is possible to suppress deterioration of the heating efficiency in the thin plate-like object to be heated and, at the same time, It is possible to suppress an increase in the temperature of the liquid.

Fig. 1 (a) is a schematic explanatory view of an induction heating apparatus provided with a transverse coil according to a conventional technique, and Fig. 1 (b) is a cross- Fig. 2 is a schematic configuration explanatory view showing an induction heating apparatus.
Fig. 2 (a) is a schematic explanatory view of the induction heating apparatus according to the present invention, and Fig. 2 (b) is a view as seen from an arrow I in Fig.
3 is an explanatory view of the operation of the induction heating apparatus according to the present invention.
4 (a) and 4 (b) illustrate the operation of the induction heating apparatus according to the present invention.
Fig. 5 is an explanatory view showing a modified example of the induction heating apparatus according to the present invention, and is an explanatory diagram showing a state in which two heating coils are installed above and below the object to be heated.
Fig. 6 is an explanatory view showing a modified example of the induction heating apparatus according to the present invention, and is a schematic configuration explanatory view of an induction heating apparatus in which a heating coil is attached and a curved portion is gently bent to form a root symbol.
7 (a) and 7 (b) are explanatory views showing a modified example of the induction heating apparatus according to the present invention. FIG. 7 (a) is a schematic view of an induction heating apparatus in which a thin plate- And Fig. 7 (b) is a view as seen from an arrow II in Fig. 7 (a).
8 (a) and 8 (b) are explanatory diagrams showing a modified example of the induction heating apparatus according to the present invention. Fig. 8 (a) is a view showing the induction heating apparatus in which a plurality of plate- Fig. 8B is a view as seen from an arrow III in Fig. 8A.
9 (a) and 9 (b) are explanatory views showing a modified example of the induction heating apparatus according to the present invention. Fig. 9 (a) And Fig. 9 (b) is a schematic configuration explanatory view of an induction heating apparatus in which spaces S2 and S3 are formed into a substantially semicircular shape.
Fig. 10 is an explanatory diagram showing a modified example of the induction heating apparatus according to the present invention, and is a schematic configuration explanatory view of an induction heating apparatus in which a plate-shaped magnetic member is provided near a heating coil.
11 (a) and 11 (b) are explanatory views showing a modified example of the induction heating apparatus according to the present invention, wherein Fig. 11 (a) is a schematic configuration explanatory view of an induction heating apparatus in which a heating coil is brought into contact with a pressing member , And Fig. 11 (b) is a view as seen from an arrow IV in Fig. 11 (a).
12 (a), 12 (b) and 12 (c) are explanatory views showing a modified example of the induction heating apparatus according to the present invention, Fig. 12 (b) is a view as seen from an arrow V in Fig. 12 (a), and Fig. 12 (c) is an explanatory view showing a slot in which a screw is inserted in a heating coil.
Fig. 13 is an explanatory view showing a modified example of the induction heating apparatus according to the present invention, and is a schematic configuration explanatory view of an induction heating apparatus in which one heating coil is moved in an inclined direction with respect to a direction perpendicular to the conveyance direction.
14 is a schematic structural explanatory view showing a modified example of the induction heating apparatus according to the present invention.
Fig. 15 (a) is a view as seen from an arrow VI in Fig. 14, and Fig. 15 (b) is a view as seen from an arrow VII in a portion where the heating coils are electrically connected with each other as shown in Fig. Is an explanatory diagram showing a state in which the heating coils are electrically connected.
Figs. 16A and 16B are schematic explanatory diagrams showing a modification of the induction heating apparatus shown in Fig. 14. Fig.
Figs. 17A, 17B and 17C are explanatory views showing a modification of the induction heating apparatus shown in Fig.
18 (a), 18 (b), 18 (c) and 18 (d) are explanatory diagrams when the pressing member and the cylinder are provided only on the upper end side of the heating coil 18 on the other end side.
19 (a) and 19 (b) are explanatory diagrams when a pressing member and a cylinder are provided only on the lower side of one end of the heating coil 20.

Hereinafter, an embodiment of an induction heating apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Here, FIG. 2 (a) is a schematic explanatory view of the induction heating apparatus according to the present invention, and FIG. 2 (b) shows a view from arrow I in FIG. 2 (a).

2 includes a high frequency power source 12 and a guide 16 connected to the high frequency power source 12 via a feeder 14 and a guide 16 A heating coil 18 for forming a slide portion 18a for sliding on the heating coil 16 and a guide portion 20a for guiding a slide portion 18b formed on the other end side of the heating coil 18, And a heating coil 20 connected to the high frequency power source 12 via a feeder 22 in a linear portion 20b formed on the other end side.

The guide 16, the heating coil 18 and the heating coil 20 are formed of, for example, copper, and are preferably made of the same material.

The heating coil 18 and the heating coil 20 are spaced apart from each other so as not to be electrically connected to each other except for a part thereof.

More specifically, the heating coil 18 is movably provided in the guide portion 20a of the heating coil 20, and the heating coil 18 and the heating coil 20 are disposed inside the heating coil 20 (For example, water) for cooling the liquid.

(루트)"의 형상을 본뜬 대략 루트 기호 형상으로 형성되며, 굴곡되어 첨부(18c)를 구비한 돌부(18e) 및 굴곡부(18d)를 형성하고 있다. 즉, 돌부(18e)는 첨부(18c)를 꼭지점으로 하여 예각으로 굴곡된 형상으로 되어 있다.The heating coil 18 has a symbol "

Quot; root ". The protruding portion 18e is bent in the direction of the attachment 18c and the protruding portion 18e and the bent portion 18d, And has a shape bent at an acute angle.

(루트)"의 형상을 본뜬 대략 루트 기호 형상으로 형성되며, 굴곡되어 첨부(20c)를 구비한 돌부(20e)와 굴곡부(20d)를 형성하고 있다. 즉, 돌부(20e)는 첨부(20c)를 꼭지점으로 하여 예각으로 굴곡된 형상으로 되어 있다.In the same form, the heating coil 20 has a symbol "

Quot; root ". The protruding portion 20e is formed in the shape of a root symbol and is bent to form a protruding portion 20e and a bent portion 20d having the attachment 20c. And has a shape bent at an acute angle.

The heating coil 18 and the heating coil 20 are provided on the upper side of the thin plate-like object 24 to be fed and are electrically connected to the slide portion 18b and the guide portion 20a.

The heating coil 18 and the heating coil 20 are arranged such that a substantially rectangular shape is formed so as to cross each other so as not to be electrically connected to each other on the upper side of the conveyance path 26 through which the thin plate- And the heating coil 18 and the heating coil 20 are provided so that the thin plate-like heated object 24 conveyed to the conveying path 26 is positioned substantially parallel to each other.

The heating coil 18 is provided on the upper side of the heating coil 20 and is provided so that the protruding portion 18e protrudes toward the front side in the feeding direction in which the thin plate shaped object 24 is fed.

The heating coil 18 is formed such that the slide portion 18a, the bent portion 18d and the attachment 18c are located on the same plane. The slide portion 18b is formed so as to overlap with the guide portion 20a vertically do.

On the other hand, the heating coil 20 is provided on the lower side of the heating coil 18 and is provided so that the protruding portion 20e protrudes toward the rear side in the feeding direction in which the thin plate-like object 24 is fed.

The heating coil 20 is formed such that the guide portion 20a, the bent portion 20d, the attachment 20c, and the straight portion 20b are located on the same plane.

The guide portion 20a provided in the guide 16 and the heating coil 20 is formed to have a predetermined length and the slide portion 18a provided in the heating coil 18 when the heating coil 18 is moved And (18b), respectively.

In the above configuration, a method of heating the thin plate shaped object 24 by using the induction heating apparatus 10 will be described with reference to operation explanatory views shown in Figs. 3 and 4. Fig.

In order to heat the object 24 to be thinned by using the induction heating apparatus 10, first, the heating coil 18 is moved in the direction of arrow A or in the direction of arrow B (that is, The position of the point P and the point Q at which the heating coil 18 and the heating coil 20 intersect without electrical connection are moved from the lower side of the heating coil 18 and the heating coil 20 (Refer to FIG. 3) of each of the edge portions 24a, 24b of the thin plate-like object 24 to be heated.

When the point P and the point Q are positioned in the vicinity of the edge portions 24a and 24b, the point P and the edge portion 24a face each other in the vertical direction of the paper surface in Fig. 3, It is preferable to adjust so that the upper surface 24b faces in the vertical direction of the paper surface in Fig.

Specifically, when the thin plate-like heated object 36 having a width smaller than that of the thin plate-like heated object 24 in the induction heating apparatus 10 is heated, the heating coil 18 is moved in the direction of arrow A So that the positions of the point P and the point Q where the heating coil 18 and the heating coil 20 intersect with the edge portions 36a and 36b of the thin plate- (See Fig. 4 (a)).

Further, by moving the heating coil 18 in the direction of the arrow A, the substantially rectangular space S1 formed by the heating coil 18 and the heating coil 20 is reduced. In addition, at this time, the space S2 and S3, which are substantially triangularly formed on the outer side of the space S1 on the lower side in the area where the thin plate-like object 24 is not fed, It is not reduced or enlarged even if it moves in the direction of arrow A.

The space S2 is formed by one apex of a substantially triangular shape by the attachment 18c of the heating coil 18 and the space S3 is formed by the attachment 20c of the heating coil 20, One vertex is formed.

When heating the thin plate-shaped heated object 38 having a width larger than that of the thin plate-like heated object 24 in the induction heating apparatus 10, the heating coil 18 is moved in the direction of arrow B So that the positions of the point P and the point Q where the heating coil 18 and the heating coil 20 intersect with the edge portions 38a and 38b of the thin plate- (See Fig. 4 (b)).

Further, by moving the heating coil 18 in the direction of the arrow B, the substantially rectangular space S1 formed by the heating coil 18 and the heating coil 20 is enlarged. In addition, at this time, the substantially triangular spaces S2 and S3 are not reduced or enlarged even when the heating coil 18 moves in the direction of arrow B.

Thereafter, when a high-frequency current is supplied from the high-frequency power source 12 to the guide 16 via the feeder 14, the supplied high-frequency current flows from the guide 16 to the slide portion The heating coil 18 provided with the guide portion 20a from the slide portion 18b of the heating coil 18 is supplied to the heating coil 18 through the heating coil 20 provided with the guide portion 20a, Frequency current is generated in the heating coil 18 and the heating coil 20 by causing the heating coil 20b to return to the high frequency power source 12 via the feeder 22. [

3, the magnetic flux is generated in the space S1 from the back surface of the paper to the surface by the flow of the high-frequency current in the heating coil 18 and the heating coil 20. As a result, The eddy current is induced on the surface of the thin plate-shaped heated object 24 by passing through the heated object 24, thereby heating the thin plate-shaped heated object 24.

In the spaces S2 and S3, a magnetic flux is generated in the heating coil 18 and the heating coil 20 from the surface of the paper to the back surface in Fig. 3 due to the flow of the high-frequency current, A magnetic flux in a direction opposite to the magnetic flux generated in the space S1 is generated.

Here, in the vicinity of the edge portions 24a, 24b of the thin plate-like object 24 to be fed downward of the space S1, the magnetic flux passing through the thin plate- (That is, the magnetic fluxes generated in the spaces S2 and S3) are generated in the direction opposite to the direction of the magnetic flux generated in the space S1, and a part of the reverse magnetic flux is generated at the edge portions 24a and 24b .

Therefore, in the edge portions 24a and 24b of the thin plate shaped object 24, eddy currents induced in the direction opposite to the eddy current induced in the thin plate shaped object 24 are induced, so that the edge portions 24a ) And (24b) is suppressed.

In the induction heating apparatus according to the technique disclosed in Patent Document 1 in which the size of the first space is adjusted by moving the V-shaped heating coil, when the first space is enlarged, the second space and the third space are reduced, When the 1 space is reduced, the second space and the third space are enlarged. At this time, the first space is enlarged or reduced in proportion to the square of the width of the thin plate-like object to be heated.

For this reason, the induction heating apparatus according to the technique disclosed in Patent Document 1 adjusts to reduce the first space in accordance with the width of the thin plate-shaped object to be heated when the width of the thin plate-like object to be heated becomes small, The magnetic flux generated in the thin plate-like shaped object decreases in proportion to the square of the width of the thin plate-shaped object to be heated. At this time, since the second space and the third space are enlarged, the magnetic flux generated in the second space and the third space is increased.

That is, when the width of the thin plate-like object to be heated becomes small, the eddy current induced in the thin plate-like object to be heated by the magnetic flux generated in the first space decreases and the eddy current induced in the direction opposite to the eddy current The eddy current induced by the magnetic flux generated in the third space) becomes large.

Accordingly, in the induction heating apparatus according to the technique disclosed in Patent Document 1, as the width of the thin plate-like heated object becomes smaller, the heating efficiency in the thin plate-shaped heated object is lowered due to the reduction of the magnetic flux generated in the first space, An increase in the magnetic flux generated in the second space and the third space causes an additional reduction in the heating efficiency in the thin plate shaped material to be heated.

As described above, in the induction heating apparatus according to the technique disclosed in Patent Document 1, when the width of the thin plate-like heated object becomes small, the heating efficiency in the thin plate-like heated object is remarkably lowered.

In contrast, in the induction heating apparatus 10 according to the present invention, the spaces S2 and S3 are reduced or enlarged even when the space S1 is enlarged or reduced by moving the heating coil 18 no.

Therefore, in the induction heating apparatus 10 according to the present invention, when the width of the thin plate-like heated object 24 becomes small, the space S1 is adjusted to be narrowed according to the width of the thin plate- , The magnetic flux generated in the space S1 decreases in proportion to the width of the thin plate shaped object 24 to be heated. However, since the spaces S2 and S3 are not enlarged at this time, the magnetic fluxes generated in the spaces S2 and S3 are not increased.

That is, even if the width of the sheet-like object 24 to be heated becomes small, the eddy current induced in the sheet-like object 24 due to the magnetic flux generated in the space S1 ) And the eddy current induced by the magnetic flux generated in (S3) becomes constant.

Therefore, in the induction heating apparatus 10 according to the present invention, as the width of the thin plate-shaped heated object 24 becomes smaller, the magnetic flux generated in the space S1 decreases, The heating efficiency is lowered. However, since the magnetic flux generated in the spaces S2 and S3 does not change, the heating efficiency of the thin plate-like heated object 24 is not further reduced.

As described above, the induction heating apparatus 10 according to the present invention is superior to the induction heating apparatus according to the technique disclosed in Patent Document 1 in that the heating efficiency of the thin plate- It is possible to suppress deterioration.

"를 본뜬 대략 루트 기호 형상의 가열 코일(18)을 가열하는 박판 형상 피가열물(24)의 상방측에 있어서, 돌부(18e)가 박판 형상 피가열물(24)의 이송방향의 전방측으로 돌출하도록 배치하는 동시에, 가열 코일(18)의 하방측에 있어, 박판 형상 피가열물(24)의 상방측에 있어서, 대략 루트 기호 형상의 가열 코일(20)을 돌부(20e)가 이송방향의 후방측으로 돌출하도록 배치하도록 하였다.As described above, the induction heating apparatus 10 according to the present invention has the symbol "

The protruding portion 18e is protruded toward the front side in the conveying direction of the thin plate-like object 24 in the upper side of the thin plate-like object 24 that heats the heating coil 18 of the root- And the heating coil 20 having a substantially root shape is disposed on the lower side of the heating coil 18 and above the thin plate shaped object 24 so that the protruding portion 20e is moved rearward in the feeding direction As shown in Fig.

The heating coil 18 is movably installed in the heating coil 20 and a substantially rectangular space S1 is formed by the heating coil 18 and the heating coil 20 and the space S1 Shaped spaces S2 and S3 are formed on the outer side of the space S1 where the thin plate shaped object 24 is not conveyed to the lower side so that the space S1 ) Were adjusted.

Accordingly, in the induction heating apparatus 10 according to the present invention, the sizes of the spaces S2 and S3 are not changed and the size of the space S1 is adjusted according to the width of the thin plate- .

Therefore, according to the induction heating apparatus according to the present invention, the heating efficiency of the thin plate-like heated object 24 does not significantly decrease with the width of the thin plate-shaped heated object 24.

Further, the above-described embodiment can be modified as shown in the following (1) to (11).

(1) In the above embodiment, the heating coil 18 is moved by a not-shown moving means (for example, a motor) so that a point P (a point of intersection of the heating coil 18 and the heating coil 20) And the point Q are positioned near the edge portions 24a and 24b of the sheet-shaped heating object 24, the present invention is not limited to this. For example, The position of the point P and the point Q may be adjusted by moving the position of the point 18.

(2) In the above-described embodiment, the heating coil 18 and the heating coil 20 are provided above the thin plate-like heated object 24, but the present invention is not limited to this, The heating coil 18 and the heating coil 20 may be provided on the lower side of the object 24 to be heated.

5, the heating coil 18 and the heating coil 20 may be provided on both the upper side and the lower side of the sheet-like material 24 to be heated.

(3) In the above-described embodiment, the heating coil 18 is disposed above the heating coil 20, but the heating coil 18 may be disposed below the heating coil 20 Of course it is.

(4) In the above-described embodiment, the heating coil 20 is fixed and the heating coil 18 is moved. However, it is needless to say that the heating coil 18 is fixed, The heating coil 20 and the heating coil 20 may be movable together.

(5) In the above-described embodiment, the heating coil 18 is bent to form the attachment 18c and the bent portion 18d. However, the present invention is not limited to this and the attachment 18c and the bent portion 18d ) May be gently bent to form a root symbol shape (refer to Fig. 6).

The heating coil 20 is bent so as to form the attachment 20c and the bend 20d but the present invention is not limited thereto and the attachment 20c and the bend 20d may be gently bent to form a root symbol shape (See Fig. 6).

Accordingly, the flow of the cooling water flowing through the heating coils 18, 20 in the heating coils 18, 20 becomes smooth, and the cooling effect by the cooling water can be improved.

(6) In the above-described embodiment, the heating coil 18 and the heating coil 20 are all provided above the thin plate-like object 24 to be fed, but the present invention is not limited thereto .

That is, when the heating coil 18 and the heating coil 20 are disposed, the heating coil 18 is provided on the upper side of the thin plate-like heated object 24, and the heating coil 20 is heated The heating coil 18 may be provided on the lower side of the water 24 and the heating coil 18 may be provided on the lower side of the thin plate-like heated object 24 (see Figs. 7A and 7B) The coil 20 may be provided on the upper side of the sheet-like object 24 to be heated.

(7) It goes without saying that, in the embodiment described above, a magnetic material may be used for efficient heating.

More specifically, a plate-shaped magnetic material may be disposed above the heating coil 18 and the heating coil 20 located above the thin plate-like heated object 24 ) (b) and FIG. 10).

That is, the heating coil 18 and the heating coil 20 are disposed between the plate-like magnetic material and the thin plate-like heated object 24.

Accordingly, the magnetic flux generated in the substantially rectangular space S1 formed by the heating coil 18 and the heating coil 20 can be concentrated by the magnetic material, and the heating efficiency can be improved.

When the heating coil 18 is disposed above the thin plate shaped object 24 and the heating coil 20 is disposed below the thin plate shaped object 24 as in (6) Like magnetic material may be disposed above the heating coil 18 or a plate-shaped magnetic material may be disposed below the heating coil 20, or the heating coil 18 Like magnetic material may be disposed on the upper side of the heating coil 20 and the plate-like magnetic material may be disposed on the lower side of the heating coil 20. [

When the heating coil 18 is disposed on the lower side of the thin plate-like object 24 and the heating coil 20 is disposed on the upper side of the thin plate-like object 24, the heating coil 18 Like magnetic material may be arranged on the lower side of the heating coil 18 or on the lower side of the heating coil 18 or on the lower side of the heating coil 18, Shaped magnetic material may be arranged on the upper side of the heating coil 20 while arranging the magnetic material of the shape of the heating coil 20.

That is, the plate-like magnetic material is provided so as to cover the substantially rectangular space S1 formed by the heating coil 18 and the heating coil 20. [

Such a plate-like magnetic material may be a single plate-shaped magnetic member molded in accordance with the width of the thin plate-like heated object 24 (see FIG. 10) (Refer to Fig. 8 (a)).

When a plate-like magnetic material is formed by a plurality of magnetic members, a plurality of magnetic members are provided side by side in the width direction of the thin plate-shaped heated object 24 according to the width of the thin plate- , It is possible to adjust the length in the width direction of the plate-shaped magnetic material, thereby making it possible to easily adjust the length in the width direction of the plate-like magnetic material.

(8) In the above-described embodiment, the space S2 is formed into a substantially triangular shape with the attachment 18c of the heating coil 18 as one of the apexes, and the space S3 is attached to the heating coil 20 (20c) has a substantially triangular shape with one of its apexes, but needless to say, it is not limited thereto.

That is, the shape of the projecting portion 18e of the heating coil 18 is deformed so that the space S2 is formed into a substantially rectangular shape (see FIG. 9A) or a substantially semicircular shape (see FIG. 9B) Or the like.

In the same manner, the shape of the vicinity of the attachment 20c of the heating coil 20 is modified so that the space S3 has a substantially rectangular shape (see FIG. 9A) or a substantially semicircular shape (shown in FIG. ) May be used.

(9) In the above-described embodiment, the slide member 18b provided on the other end side of the heating coil 18 is guided by the guide portion 20a provided on one end side of the heating coil 20 Although the heating coil 18 and the heating coil 20 are in contact with each other at all times, the heating coil 18 and the heating coil 20 are not in contact with each other when the heating coil 18 is moving And the heating coil 18 may be brought into contact with each other when the movement of the heating coil 18 is completed.

Specifically, it is possible to adopt the first configuration, the second configuration or the third configuration described below.

(A) First configuration

The heating coil 18 and the heating coil 20 are provided so as to be in parallel with the thin plate-like heated object 24 to be conveyed without contacting each other, and the heating coil 18 and the heating coil 20 are provided on the other end side of the heating coil 18 And the pressing member 212 is provided on the lower side of one end of the heating coil 20 (see Figs. 11 (a) and (b)).

In this case, it is not necessary to provide the slide member 18b in the heating coil 18, and further, it is not necessary to provide the guide portion 20a in the heating coil 20. [

The other end side of the heating coil 18 and one end side of the heating coil 20 are designed to always be spaced apart from each other by, for example, a biasing means (not shown).

The pressing member 210 is formed of an insulating material and is provided at a lower side end of the rod-shaped member 214-1 extending from the cylinder 214. [

The cylinder 214 moves the rod-shaped member 214-1 upward and downward by, for example, a solenoid. By the movement of the rod-like member 214-1, So that it moves upward and downward. The mechanism for moving the rod-like member 214-1 to the upper side and the lower side is not limited to the solenoid, and a conventionally known technique can be used.

Then, as the bar-shaped member 214-1 moves downward, the pressing member 210 moves downward and presses the heating coil 18 downward from the upper side at a predetermined pressure. As a result, the heating coil 18 is pushed downward against the urging force of the urging means (not shown).

Further, as the bar-shaped member 214-1 moves upward, the pressing member 210 moves upward to release the pressure to the heating coil 18. As a result, the heating coil 18 is pushed upward by the urging force of the urging means (not shown).

The pressing member 212 is formed of an insulating material and is provided at the upper end of the rod-like member 216-1 extending from the cylinder 216. [

The cylinder 216 moves the rod-shaped member 216-1 upwardly and downwardly by, for example, a solenoid. By the movement of the rod-like member 216-1, So that it moves upward and downward. The mechanism for moving the rod-shaped member 216-1 to the upper side and the lower side is not limited to the solenoid, and a conventionally known technique can be used.

Then, as the bar-like member 216-1 moves upward, the pressing member 212 moves upward and presses the heating coil 20 at a predetermined pressure from the lower side toward the upper side. Thus, the heating coil 20 is pushed upwards against the biasing force of the biasing means (not shown).

Further, as the bar-like member 216-1 moves downward, the pressing member 212 moves downward to release the pressure to the heating coil 20. [ As a result, the heating coil 20 is pushed downward by the biasing force of the biasing means (not shown).

The pressing member 210 and the pressing member 212 are arranged such that the surface on which the pressing member 210 presses the heating coil 18 and the surface on which the pressing member 212 presses the heating coil 20 And the heating coils 18 and 20 are disposed so as to face each other with the space therebetween.

When the other end side of the heating coil 18 is not pressed by the pressing member 210 and the one end side of the heating coil 20 is not pressed by the pressing member 212, The other end side of the heating coil 18 and the one end side of the heating coil 20 are not in contact with each other and the heating coil 18 and the heating coil 20 are not in contact with each other. That is, in this case, the heating coil 18 and the heating coil 20 are not electrically connected.

When the other end side of the heating coil 18 is pressed by the pressing member 210 and one end side of the heating coil 20 is pressed by the pressing member 212, The other end side of the heating coil 18 comes into contact with one end side of the heating coil 20 and the heating coil 18 and the heating coil 20 come into contact with each other. That is, in this case, the heating coil 18 and the heating coil 20 are electrically connected.

The pressing member 210, the cylinder 214, the pressing member 212, and the cylinder 216 may be moved in the left-right direction according to the movement of the heating coil 18, or may not be moved.

Here, when the pressing member 210, the cylinder 214, the pressing member 212 and the cylinder 216 do not move in accordance with the movement of the heating coil 18, the other end side of the heating coil 18 The length of the heating coil 18 and the length of the one end side of the heating coil 20 are set such that the heating coil 18 is heated by the heating coil 18 when the heating coil 18 is moved by the pressing member 210 and the pressing member 212, And the length of the coil 20 is set to be electrically connectable.

Therefore, in the case of this configuration, the other end side of the heating coil 18 is not pressed by the pressing member 210, and the other end side of the heating coil 20 is pressed by the pressing member 212 So that the heating coil 18 and the heating coil 20 are brought into non-contact state to move the heating coil 18.

When the heating coil 18 is moved to an arbitrary position and the movement of the heating coil 18 is completed, the other end side of the heating coil 18 is pressed by the pressing member 210, The one end side of the heating coil 20 is pressed by the pressing member 212 so that the heating coil 18 and the heating coil 20 are in contact with each other.

When a high frequency current is supplied from the high frequency power source 12 to the heating coil 18 via the feeder 14 in this state, the high frequency current fed to the heating coil 18 is heated through the heating coil 20, Frequency power source 12 through the feeder 22 from the other end of the coil 20 to generate a flow of a high frequency current in the heating coil 18 and the heating coil 20. [

The pressing member 210 and the pressing member 212 are pressed and released from the heating coils 18 and 20 under the control of a control unit (Not shown) of the heating coil 18 by the detection unit (not shown), or may be performed on the basis of the operation of the heating coil 18 Or may be performed on the basis of detection results such as detection of completion of movement.

The pressing member 210 is fixed on the other end side of the heating coil 18 so as to be in contact with the upper side and the pressing member 212 is fixed to one side of the heating coil 20 downward (See Fig. 17 (c)).

In this case, a biasing means (not shown) provided so that the other end side of the heating coil 18 and the one end side of the heating coil 20 are spaced apart from each other may be provided.

When the heating coil 18 and the heating coil 20 are electrically connected to each other, the other end side of the heating coil 18 is pressed by the pressing member 210, (20).

When the electric connection between the heating coil 18 and the heating coil 20 is released, the pressing of the heating coil 18 by the pressing member 210 to the other end side is released, and the pressing member 212 To the one end side of the heating coil 20 is released. At this time, due to the upward movement of the pressing member 210 and the downward movement of the pressing member 212, the other end side of the heating coil 18 and the one end side of the heating coil 20 are spaced at a constant interval Respectively.

Here, the pressing member 210 and the cylinder 214 are provided on the other end side of the heating coil 18, and the pressing member 212 and the cylinder 216 are fixed to one side of the heating coil 20 The pressing member 210 and the cylinder 214 may be provided only on the upper side of the other end of the heating coil 18 (Fig. 17 (a)), The pressure member 212 and the cylinder 216 may be provided only on the lower side of one end of the heating coil 20 (refer to Fig. 17 (b)).

When the pressing member 210 and the cylinder 214 are provided only on the upper side of the other end of the heating coil 18, the plate spring 218 is installed on the heating coil 18, for example, So that the other end side of the heating coil 18 and the one end side of the heating coil 20 may be spaced apart from each other by a predetermined distance (see Fig. 18 (a)).

Specifically, a plate spring 218 is provided at the other end of the heating coil 18, and a moving mechanism for moving the heating coil 18 in the left-right direction via the plate spring 218 Not shown).

A lifting member 220 is provided on the lower side of the leaf spring 218 provided at the other end of the heating coil 18 on one end side of the heating coil 20, Respectively.

In this case, the pressing member 210 and the cylinder 214 move together with the heating coil 18. [

Thus, when the other end side of the heating coil 18 is pressed against the pressing member 210, the other end side of the heating coil 18 moves downward against the biasing force of the leaf spring 218, And is in contact with one end side of the heating coil 20. At this time, the leaf spring 218 smoothly bends at a portion contacting the push-up member 220 in contact with the push-up member 220 (see Fig. 18 (b)).

Thereafter, when the pressurization by the pressing member 210 on the other end side of the heating coil 18 is released, the other end side of the heating coil 18 is moved upward by the biasing force of the leaf spring 218 So that the other end side of the heating coil 18 and the one end side of the heating coil 20 are spaced apart from each other by a predetermined distance.

In the case where the pressing member 210 and the cylinder 214 are provided only on the upper end side of the other end of the heating coil 18, The pressing member 210 and the other end side of the heating coil 18 may be fixed in contact with each other (see Fig. 18 (c)).

When the other end side of the heating coil 18 is pressed by the pressing member 210, the other end side of the heating coil 18 moves downward, and the other end side of the heating coil 18 (See Fig. 18 (d)).

Thereafter, when the pressing force by the pressing member 210 on the other end side of the heating coil 18 is released, the other end side of the heating coil 18 moves upward So that the other end side of the heating coil 18 and the one end side of the heating coil 20 are spaced at a certain distance.

Further, in the case where the pressing member 212 and the cylinder 216 are provided only on the lower side of the one end side of the heating coil 20, for example, a biasing means (not shown) is not provided, The pressing member 212 may be fixed in contact with one end side of the heating coil 20 (see Fig. 19 (a)).

Thus, when one end side of the heating coil 20 is pressed by the pressing member 212, one end side of the heating coil 20 moves upward, and the other end side of the heating coil 18 (See Fig. 19 (b)).

Thereafter, when the pressing force by the pressing member 212 on one end side of the heating coil 20 is released, one end side of the heating coil 20 moves downward So that the other end side of the heating coil 18 and the one end side of the heating coil 20 are spaced at a certain distance.

(B) Second configuration

The heating coil 18 and the heating coil 20 are provided so as to be in parallel with the thin plate-like object 24 to be conveyed without contacting the heating coil 18 and the first long hole And a second slot is formed on one end side of the heating coil 20 (refer to Figs. 12 (a), (b) and (c)).

In this case, it is not necessary to provide the slide member 18b in the heating coil 18, and further, it is not necessary to provide the guide portion 20a in the heating coil 20. [

The first elongated hole is formed to have a predetermined length on the other end side of the heating coil 18 so that a screw can be inserted.

The second elongated hole is formed to have a predetermined length on one end side of the heating coil 20 so that a screw insertable in the first elongated hole can be inserted.

The heating coil 18 and the heating coil 20 are provided so that the first and second elongated holes communicate with each other.

When the screws are inserted into the first and second elongated holes and the process of fixing the screw by the nut is not performed, the other end side of the heating coil 18 and the other end side of the heating coil 20 The heating coil 18 and the heating coil 20 are not in contact with each other. That is, the heating coil 18 and the heating coil 20 are not electrically connected.

When a screw is inserted into the first long hole and the second long hole and the screw is fastened by the nut, the other end side of the heating coil 18 and the other end side of the heating coil 20 So that the heating coil 18 and the heating coil 20 are in contact with each other. That is, the heating coil 18 and the heating coil 20 are electrically connected.

The screws for inserting the first elongated hole and the second elongated hole and the nut for securing the corresponding screw are made of a conductive material.

The heating coil 18 is provided with a plurality of holes that are not the first long holes and a plurality of holes that are not the second long holes are provided in the heating coil 20 and are heated The fixed position after the movement of the coil 18 may be adjusted step by step.

Therefore, in the case of such a configuration, the process of inserting the screw into the first and second elongated holes and fixing the screw with the nut is not performed, so that the heating coil 18 and the heating coil 20 are not in contact with each other So that the heating coil 18 is moved.

When the heating coil 18 is moved to an arbitrary position and the movement of the heating coil 18 is completed, a process of inserting a screw into the first and second slots and fixing the screw with the nut The heating coil 18 and the heating coil 20 are brought into contact with each other.

When a high frequency current is supplied from the high frequency power source 12 to the heating coil 18 via the feeder 14 in this state, the high frequency current fed to the heating coil 18 is heated through the heating coil 20, A high frequency current flows through the heating coil 18 and the heating coil 20 by returning to the high frequency power source from the other end of the coil 20 via the feeder 22. [

As described above, when the heating coil 18 moves, the heating coil 18 and the heating coil 20 are not electrically connected to each other. When the high-frequency current is supplied, the heating coil 18 and the heating coil The heating coil 18 and the heating coil 18 in accordance with the movement of the heating coil 18 can be heated by the heating coil 18 and the heating coil 20 in a state in which the heating coil 18 and the heating coil 20 are always in contact with each other, A defect due to abrasion does not occur at the contact portion of the coil 20. [

In the configuration in which the heating coil 18 and the heating coil 20 are brought into contact with each other by a pressing member and a structure in which the heating coil 18 and the heating coil 20 are in contact with each other by a screw and a nut, The slide portion 18a may move on the guide portion 16 and be connected to the high frequency power source 12 via the feeder 14 connected to the guide portion 16 .

(C) Third component

The heating coil 18 and the heating coil 20 are provided so as to be in parallel with the thin plate-like object 24 to be fed without contact with each other and one end side of the heating coil 20 is connected to the heating coil 18 Like member 202 at the other end side of the heating coil 18 and at the upper side of one end side of the heating coil 20 so as to extend parallel to the other end side of the heating coil 20 And a pressing member 204 for pressing the plate-like member 202 is provided (see Figs. 14 and 15 (a)).

In this case, it is not necessary to provide the slide member 18b in the heating coil 18, and further, it is not necessary to provide the guide portion 20a in the heating coil 20. [

The heating coil 20 is provided so as to be parallel to the heating coil 18 on the lower side of the heating coil 18 so that the linear region 20s formed on one end side of the heating coil 20 is connected to the heating coil 18 (See Fig. 15 (b)). The linear region 18s is formed so as to be positioned at the same height as the straight line region 18s formed on the other end side of the light guide plate 18a.

The plate-shaped member 202 is formed of a metal having high conductivity and is provided on the upper side of the heating coil 18 and the heating coil 20 so that the linear region 18s of the heating coil 18 and the heating coil 20 And is spaced apart from the linear region 20s by a predetermined distance.

The plate member 202 is pressed against the linear region 18s of the heating coil 18 and the linear region 18c of the heating coil 20 by being pressed downward by the pressing member 204 20s to electrically connect the heating coil 18 and the heating coil 20 (refer to Fig. 15 (c)).

The plate-like member 202 is designed so as to have a predetermined height position (a height position at which the heating coil 18 and the heating coil 20 are not electrically connected) When the pressing to the plate-like member 202 is released, it returns to the predetermined height position.

In addition, the plate-like member 202 may have, for example, a cooling mechanism in which cooling water is circulated inside.

The pressing member 204 is formed of an insulating material and is provided at a lower side end portion of the rod member 206-1 provided continuously from the cylinder 206. [

The cylinder 206 is for moving the rod-like member 206-1 upwardly and downwardly, for example, by a solenoid, and the pressing member 204 is moved in accordance with the movement of the rod- So that it moves upward and downward. The mechanism for moving the rod-like member 206-1 to the upper side and the lower side is not limited to the solenoid, and a conventionally known technique can be used.

When the rod member 206-1 moves downward, the pressing member 204 moves downward to press the plate member 202 at a predetermined pressure, and the rod member 206-1 The pressing member 204 moves upward so as to release the pressing to the plate-like member 202. As a result,

The plate-like member 202, the pressing member 204 and the cylinder 206 may be moved in the left-right direction according to the movement of the heating coil 18, or may not be moved.

Here, when the plate-like member 202, the pressing member 204 and the cylinder 206 are not moved in the lateral direction in accordance with the movement of the heating coil 18, the other end side of the heating coil 18 The linear region 18s formed and the linear region 20s formed on one end side of the heating coil 20 are pressed by the pressing member 204 after the heating coil 18 moves, The heating coil 18 and the heating coil 20 are set such that they can be electrically connected to each other.

The heating coil 18 and the heating coil 20 are not brought into contact with each other and the heating coil 18 is brought into contact with the heating coil 18 by not pressing the plate member 202 by the pressing member 204. Therefore, .

When the heating coil 18 is moved to an arbitrary position and the movement of the heating coil 18 is completed, the plate member 202 is pressed by the pressing member 204, The heating coil 20 is electrically connected.

In this state, when the high-frequency power source 12 supplies the high-frequency power source to the heating coil 18 via the feeder 14, the high-frequency current supplied to the heating coil 18 passes through the plate- Frequency power source 12 via the heating coil 20 from the other end of the heating coil 20 via the feeder 22 so that the high frequency power is supplied to the heating coil 18 and the heating coil 20, Current flows.

Although the pressing member 204 is pressed and released from the plate member 202 under the control of a control unit (not shown), the control by this control unit is performed by, for example, (Not shown), or may be determined based on the detection result of the detection of the movement start instruction of the heating coil 18 by the detection unit (not shown) or the detection of the completion of the movement of the heating coil 18 May be performed on the basis of the above.

Here, the plate-like member 202, the pressing member 204 and the cylinder 206 are disposed above the linear region 18s of the heating coil 18 and the linear region 20s of the heating coil 20 The heating coil 18 may be disposed on the lower side of the linear region 18s of the heating coil 18 and the linear region 20s of the heating coil 20 (See Fig. 16 (b)) of the linear region 18s of the heating coil 20 and the linear region 20s of the heating coil 20, respectively.

The plate member 202, the pressing member 204 and the cylinder 206 are disposed on the upper side and the lower side of the linear region 18s of the heating coil 18 and the linear region 20s of the heating coil 20, The current flowing through the plate-like member 202 is halved, so that it is possible to efficiently cool the plate-shaped member 202. [

(10) In the above-described embodiment, the heating coil 18 is configured to move in the direction perpendicular to the conveying direction. However, the present invention is not limited to this, and the heating coils 18, 20, May be provided as shown in Fig. 13 so that the heating coil 18 is moved in an inclined direction with respect to the direction perpendicular to the conveying direction.

(11) The above-described embodiment and the modifications shown in the above (1) to (10) may be appropriately combined.

INDUSTRIAL APPLICABILITY The present invention is suitable for use in the case of heating a plate-shaped object to be heated, in particular, a thin plate-shaped object to be heated.

10: Induction heating device
12: High frequency power source
14, 22: Feeder
16: Guide
18, 20: Heating coil
18a and 18b:
18c, 20c: Attached
18e, 20e:
20a:
20b:
24, 36, 38: Thin-plate shaped object to be heated
24a, 24b, 36a, 36b, 38a, 38b:
26: Feed path
202: plate member
204, 210, and 212:
206, 214, and 216:
206-1, 214-1, and 216-1:
218: leaf spring
220: lifting member

Claims (9)

An induction heating apparatus for induction heating a thin plate shaped heating target by supplying a high frequency current from a high frequency power source to a heating coil,
A first heating coil which is formed in a root symbol shape and has a first projection formed on the other end side thereof and is connected to a high frequency power source at one end,
And a second heating coil connected to the high frequency power source at the other end of the second heating coil,
Wherein the first heating coil and the second heating coil are arranged in the same plane,
At least one of which is movable in a direction orthogonal to a conveying direction of the sheet material to be heated or in a direction inclined with respect to the orthogonal direction,
Wherein the first heating coil and the second heating coil are electrically connected only to one end side of the first heating coil and one end side of the second heating coil,
A first space having a rectangular shape is formed in an area where the first heating coil and the second heating coil are not electrically connected so as not to be electrically connected to an edge portion of the thin plate- Wherein the first space is provided so as to form a second space and a third space in a region where the thin plate-
The magnetic flux generated by the high-frequency current is reversed in the first space, the second space, and the third space,
By moving at least one movable relative to the first heating coil and the second heating coil, the first space expands or contracts in the orthogonal direction, and the second space and the third space do not expand and contract Wherein the heating element is a heating element. The method according to claim 1,
And the other end side of the first heating coil is movably provided in contact with one end side of the second heating coil. The method of claim 1, further comprising:
And a pressing means for pressing at least one of the other end side of the first heating coil and the one end side of the second heating coil,
Wherein at least one of the first heating coil and the second heating coil is not pressed by the pressing means and the first heating coil and the second heating coil are not electrically connected And after the movement of at least one of the first heating coil and the second heating coil is completed, pressing by the pressing means is performed, and the first heating coil and the second heating coil are electrically connected Wherein said heating means is a heating means. The method according to claim 1,
A first elongated hole is formed on the other end side of the first heating coil,
A second long hole is formed on one end side of the second heating coil,
When at least one of the first heating coil and the second heating coil moves, a screw is not inserted into the first elongated hole and the second elongated hole so that the first heating coil and the second heating coil are electrically And after the movement of at least one of the first heating coil and the second heating coil is completed, a screw is inserted into the first elongated hole and the second elongated hole, And the second heating coils are electrically connected to each other. The method according to claim 1,
A plate-like member formed of a metal exhibiting conductivity and provided at an interval from the other end side of the first heating coil and one end side of the second heating coil;
And a pressing means for pressing the plate-like member,
Wherein at least one of the first heating coil and the second heating coil is not pressed by the pressing means and the first heating coil and the second heating coil are not electrically connected And after the movement of at least one of the first heating coil and the second heating coil is completed, pressurization is performed by the pressing means, and the first heating coil and the second heating coil And the coils are electrically connected to each other. 6. The method according to any one of claims 1 to 5,
The first protrusion has a shape bent at an acute angle with the first attachment as a vertex,
Wherein the second space is formed in a triangular shape having the first attachment as one vertex,
The second protrusion has a shape bent at an acute angle with the second attachment as a vertex,
And the third space is formed in a triangle shape having the second attachment as one vertex. 6. The method according to any one of claims 1 to 5,
Wherein the first heating coil and the second heating coil are gently bent to form a root symbol shape. 6. The method according to any one of claims 1 to 5,
And a plate-like magnetic material provided so as to cover an area where the first space is formed. 9. The method of claim 8,
Wherein the magnetic material is formed by arranging a plurality of magnetic members extending in the conveying direction of the sheet-like object to be heated in parallel in a width direction of the sheet-like object to be heated.

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