JPH03138887A - High-frequency induction heating device - Google Patents

Abstract

PURPOSE:To efficiently perform heating and pressing by providing the first coil section on the first pressing roll, providing the second coil section on the second pressing roll, and electrically connecting them so that high-frequency currents in opposite directions flow in the first and second coil sections. CONSTITUTION:A pressing roll 12 is rotated and presses a heated body 108 in sequence together with a mating pressing roll 16. The pressing roll 12 has the first coil section 48 extended in the rotation axis direction, the pressing roll 16 has the second coil section 102 arranged near the first coil section 48 face to face, and the first coil section 48 and the second coil section 102 are electrically connected so that high-frequency currents flow in opposite directions. The high-frequency electromagnetic field is formed in the region between the first coil section 28 and the second coil section 102, and the heated body 108 is high-frequency-heated in sequence. The heated body 108 is pressed by pressing rolls 12 and 16 in sequence, and the pressed portion or its vicinity is high- frequency-heated. Pressing and heating can be efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high frequency induction heating device for inductively heating a conductive object.

BACKGROUND ART A method using high frequency induction heating is known as a method of heating a conductive object.

For example, when laminating a relatively thin metal plate and a synthetic resin film continuously, the continuously moving metal plate is heated by a fixedly installed high-frequency induction coil, and then the synthetic resin film is attached. Conventionally, bonding has been carried out by pressing a heated metal plate with a pair of press rolls.

However, according to this conventional method, the position heated by the heating coil and the position pressed by the pressure roll are misaligned, so the heat is diffused between the time the metal plate is heated and the time it is pressed. There is a problem that the temperature drops when pressing.

For this purpose, in the past, the materials were heated to a high temperature using a heating coil so that the temperature at the position pressed by the pressure roll was optimal for bonding.

However, increasing the temperature of the metal plate is not preferable because there is a risk of deteriorating the metal plate material and its processing components.

For example, if the bonding temperature between the metal plate and the film is relatively high, and it is not preferable to make the metal plate considerably higher than the bonding temperature in advance, the bonding temperature may be lowered due to heat conduction from the metal plate to the film during bonding. In order to prevent insufficient bonding temperature, it has been proposed to use a heated roll as a pressure roll.

However, when a heated roll is used, the heat of the roll acts on the bonding interface between the metal plate and the film through the film. Supplying heat through the film in this manner is not preferable in terms of heating efficiency, and may cause additional thermal damage to the film.

Furthermore, with the fixed high-frequency induction heating coil as described above, it is difficult to selectively heat a part of a continuously moving object.

The present invention has been made in view of these circumstances, and an object of the present invention is to provide an efficient high-frequency induction heating device by heating an object being pressed.

Means for Solving the Problems According to the present invention, the problem as described above is achieved by comprising first and second pressing devices for pressing the object to be heated, and the first pressing device is constituted by a pressing roll. The pressure roll includes a first coil portion extending in the rotational axis direction, and the second suppression device includes a second coil portion disposed adjacent to and opposite to the first coil portion. To provide a high frequency induction heating device including a coil part, wherein the first coil part and the second coil part are electrically connected so that high frequency currents in opposite directions are caused to flow therethrough. solved by.

Function The high-frequency induction heating device of the present invention includes first and second suppressing devices that press the object to be heated. The first and second pressing devices cooperate to press the object to be heated, or together with other pressing devices, press the object to be heated.

The first pressing device is constituted by a pressing roll.

The pressing roll has a pressing surface having a circular cross-section, a fan-shaped cross-section, or the like, and rotates to sequentially press the object to be heated substantially seamlessly together with an opposing pressing device.

The pressure roll includes a first coil portion extending in the direction of the rotation axis.

A second pressing device includes a second coil portion disposed adjacent to and opposite the first coil portion.

The first coil section and the second coil section are electrically connected so that high frequency currents flow in opposite directions.

For this reason, a high frequency electromagnetic field is formed in the region between the first coil portion and the second fill portion, and the heated object made of, for example, a metal material placed there is successively high frequency heated.

The object to be heated is sequentially pressed by the pressing roll, and the pressed portion or its vicinity is subjected to high-frequency heating, so that the pressing and heating can be carried out efficiently.

Embodiment (First Embodiment) Next, a high-frequency induction heating apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

First, referring to FIGS. 1 and 2, this high-frequency induction heating device includes a lower support device IO and a lower press roll 12 that constitutes a first press device supported by the lower support device [10]. , an upper support device 14, and an upper press roll 16 that constitutes a second press device supported by the upper support device I4.

The lower support device IO includes a fixed support base 18 and a fixed support base I
8, two bearings 20 and 22 rotatably support the lower suppression roll I2, a movable support plate 24 installed on the fixed support base 18 so as to be movable in the vertical direction, and a movable support plate 24 installed on the fixed support plate 18, and The first and second terminals 26.28 installed in
It is equipped with

The first and second terminals 26 and 28 are electrically insulated from each other and connected to the high frequency power source P. The movable support plate 24 is provided with a pin 31 that extends downward and passes through the hole 30 of the fixed support plate 18, and around this pin 31 and between the fixed support plate 18 and the movable support plate 24. A spring 32 is arranged to force the movable support plate 24 upwardly so that the first and second terminals 26 , 28 are pressed against the lower pressure roll 12 .

The lower pressing roll 12 includes an inner roll part 34 and an outer roll part 36.

The inner roll portion 34 has a shaft portion 38 rotatably supported by a bearing 20, and a gear 40 is attached to the shaft portion 38.

The inner roll portion 34 includes a first flow path 42 extending from the end of the shaft portion 38 to the outer periphery of the central portion of the inner roll portion 34, and a second flow path 44 extending from the outer periphery to the other end. is formed. Cooling water for cooling the lower pressure roll 12 flows through these channels 42,44.

The outer roll portion 36 is formed of a conductive material and includes a first feeding electrode portion 46 , a first coil portion 48 , a shaft portion 50 , a fifth feeding electrode portion 27 , and a sixth feeding electrode portion 29 .

An annular space 52 is formed between the outer roll part 36 and the inner roll part 34, and this annular space 52 is
It communicates with the first and second channels 42, 44 of the inner roll part 34 and is sealed from the outside.

A fourth feeding electrode section 56 is connected to the outer periphery of the shaft section 50 of the outer roll section 36 via a tubular insulator 54.
A fifth feeding electrode section 27 is fixedly provided. The fourth feeding electrode section 56 and the fifth feeding electrode section 27 are rotatably supported by the bearing 22.

The shaft portion 50 is provided with a channel 58 that is connected to the sixth feeding electrode portion 29 and communicates with the second channel 44 of the inner roll portion 34 .

As mentioned above, the first and second terminals 26.28 are connected to the spring 3
2 is in pressure contact with the fifth and sixth feeding electrode portions 27, 29 of the lower press roll 12, and as a result, the fifth feeding electrode portion 27 and the first terminal 26 are brought into contact and electrically connected. The sixth feeding electrode portion 29 and the second terminal 28 are brought into contact and electrically connected.

Therefore, for example, the end of the shaft portion 38 of the inner roll portion 34 (
By supplying cooling water to the first flow path 42 from the left end in FIG.
an annular space 52 between the inner roll part 34 and the second flow path 44 of the inner roll part 34, and a shaft part 5 of the outer roll part 36.
Cooling water flows through the flow path 58 in the lower press roll 12 to cool the lower press roll 12.

A tubular insulator 59 is fixed to the outer periphery of the first coil portion 48 of the outer roll portion 36, and this insulator 59 forms a pressing surface that presses against the object to be heated. Since the object to be heated is heated by induction heating, the object to be heated is made of a conductor. Therefore, even when the object to be heated is covered with an insulator, the pressing surface is preferably formed of an insulator.

However, if the object to be heated is a conductor sufficiently covered with an insulator, the pressing surface can also be formed by the coil part itself.

The upper support device 14 includes a fixed support plate 60, a movable support plate 62 installed on the fixed support plate 60 so as to be movable in the vertical direction, and bearings 64 and 66 installed on the movable support plate 62.

The movable support plate 62 is provided with a pin 72.74 extending upwardly and passing through the hole 68.70 in the fixed support plate 60, around the pin 72.
A spring 76,78 is arranged between the movable support plate 62 and the movable support plate 62 to force the movable support plate 62 downwardly. pin 7
2.74 is provided with an enlarged portion 80.82 to limit the downward movement of the movable support plate 62.

The upper press roll 16 includes an inner roll portion 84 and an outer roll portion 86 .

The inner roll portions 84 each have shaft portions 88 , 90 rotatably supported by bearings 64 , 66 , and one shaft portion 88 has a gear 40 provided on the shaft portion 38 of the lower pressure roll 12 . For example, by driving one of the gears by a drive mechanism (not shown), the lower pressure roll 12 and the upper pressure roll 16 are rotated at the same rotational speed.

The inner roll part 84 has a first flow path 94 extending from the end of one shaft part 88 to the outer periphery of the inner roll part 84 and a second flow passage 94 extending from the outer periphery to the end of the other shaft part 90 . flow path 9
6 is formed.

The outer roll portion 86 is formed of a conductive material and includes second and third feed electrode portions 98,100 and a second coil portion +02 therebetween.

An annular space 104 is formed between the outer roll part 86 and the inner roll part 84, and this annular space 104
are the first and second channels 94 and 96 of the inner roll portion 84.
It communicates with the outside and is sealed from the outside. Thereby, for example, by supplying cooling water to the first flow path 94, the cooling water flows through the first flow path 94, the annular space 104, and the second flow path 96, and the upper pressing roll 16 will be cooled.

On the outer periphery of the second coil portion 102 of the outer roll portion 36,
A tubular insulator 106 is provided, which insulator 10
6 forms a suppressing surface that presses the object to be heated.

As mentioned above, the movable support plate 62 is forced downward by the springs 76, 78I, and the bearings 64.66 and the upper pressure roll 16 are forced downward.

As a result, the second and third feeding electrode parts 98.100 of the upper pressing roll 16 are brought into pressure contact with the first and fourth feeding electrode parts 46.56 of the lower pressing roll 12, and the first feeding electrode The section 46 and the supply 'Ill' pole section 98 of M2 are electrically connected, and the third supply electrode section 100 and the fourth supply electrode section 56 are electrically connected.

By connecting in this way, the high frequency power source P is connected to the first terminal 26 and the second terminal 28, so that the first terminal 26, the shaft portion 50, and the first coil portion 48
, the first feeding electrode section 46, the second feeding electrode section 98, the second coil section 102, the third feeding electrode section 100. A high frequency current flows through the fourth feeding electrode portion 56 and the second terminal 28 .

The high frequency current flows in the first and second coil sections 48, 102 in opposite directions, so that a high frequency electromagnetic field is generated between them, and the object to be heated is heated.

With the arrangement as described above, and as shown in FIG. When supplied between
The steel plate 108 is inductively heated by the high-frequency electromagnetic field generated between the first and second coil parts 48 and 102, and the synthetic resin film 110 is pressed and thermally bonded to the steel plate 108.

Preferably, current is passed through the first and second coil portions 48° 102 in opposite directions as described above.

When current is passed through the coil portions 48 and 102 in opposite directions,
Due to the so-called proximity effect, the current flows through the pair of coil parts 48.
．． 102 to a certain extent.

This makes it possible to heat the object particularly effectively when the object to be heated disposed between them is made of a magnetic material such as a steel plate.

Further, a support similar to the support 24 provided on the fixed support 18 is provided on the movable support plate 62 of the upper support device 14,
The second terminal 28 can be supported by this support, and the support 24 provided on the fixed support base I8 can be configured to support only the first terminal 26.

In this case, by connecting the high frequency power source P to the first terminal and the second terminal, the first terminal, the shaft portion 50,
A high-frequency current flows through the first coil section 48, the first feeding electrode section 46, the second feeding electrode section 98, the second coil section 102, and the second terminal, and the Electrode part 100
．． 56 can be omitted.

However, the embodiment shown in FIG. 1 is more preferable than this embodiment because it has a simpler structure and a smaller number of parts.

A preferred modification of the lower and upper pressure rolls 12.16 will now be described with reference to FIGS. 3 and 4.

As described above, in the embodiment shown in FIGS. 1 and 2, the first and second coil portions 48, 102 have a cylindrical shape, and the high frequency current is transmitted, for example, in the cross-sectional view (FIG. 2). substantially the same current density flows throughout. Therefore, with this configuration, a high-frequency electromagnetic field is formed in a relatively wide space, but the electromagnetic field is weak and does not efficiently spread the steel plate 108 supplied between the first and second coil portions 48.102. It may not be possible to heat it.

FIGS. 3 and 4 show a pressure roll 116 which has been improved in this respect and can be used as an upper pressure roll.

This pressure roller 116 includes an inner roll part 118 and an outer roll part 120, and like the upper pressure roll shown in FIGS. 1 and 2, cooling water flows through this annular space! 22
is supplied to Second coil portion 1 of outer roll portion 120
A tubular insulator 12 that is in pressure contact with the heated object is disposed on the outer periphery of the insulator 26.
8 is provided (Fig. 3). In FIG. 4, this insulator is omitted.

As shown in FIGS. 3 and 4, the second feeding electrode portion 130 of the outer roll portion 120 of the pressure roll 116 is separated by a diagonal narrow groove 132, and the second coil portion 12
6 extend in the longitudinal direction (horizontal direction in FIG. 3) and are separated by narrow grooves 134 filled with an insulator, and the insulator 124 is arranged inside the outer roll part 120 as described above. Accordingly, the second feed electrode m130 and the second coil portion 126 form, for example, twelve portions 136 that are electrically insulated from each other. As shown in FIG. 3, the third feeding electrode portion 138 is integrally formed without having a narrow groove, and thereby the twelve portions 136 are electrically connected to each other.

With this configuration, the second feeding electrode section 130 and the third feeding electrode section 138 of the press roll J16 are connected to the first feeding electrode section and the fourth feeding electrode section of the lower suppression cool, not shown. , one or two of the twelve portions 136
A high frequency current flows through. Since the narrow grooves 132 of the second feeding electrode part 130 are oblique, when the first feeding electrode part makes contact with the thin grooves 132 at the part of the narrow grooves 132, the two feeding electrode parts on both sides of the narrow grooves 132 of the second feeding electrode part 130 will come into contact with the part,
Current flows through the two parts.

In this way, the thin 51132.134 is provided and #! 2
By separating the coil section into a plurality of sections, the density of high-frequency current can be increased, and a strong electromagnetic field can be generated in a narrow region between the first and second coil sections.

Since the narrow groove 132 of the second feeding electrode section 130 is oblique, the first feeding electrode section is always connected to the second feeding electrode section 130.
The first feeding electrode section 132 is in contact with one or two portions of the feeding electrode section 132, and the electrical connection between the first feeding electrode section and the second feeding electrode section is never broken. That is, if the narrow grooves 132 are formed in the longitudinal direction (horizontal direction in FIG. 3), there is a risk that the electrical connection between the first feeding electrode part and the second feeding electrode part will be temporarily cut off. The narrow groove 132 of the second feeding electrode $130 may have any shape as long as it always comes into contact with one or two parts, and in addition to the straight oblique line shape shown in FIG. It may be a linear shape, a polygonal line shape, or the like.

(Second Example) Next, the 51st! 1 to 7, the second aspect of the present invention
A high frequency induction heating device according to an embodiment will be described.

This high frequency induction heating device is 1i140 for cans (Figure 7).
It is used to heat-bond the tape tab 142 to the tape tab 142.

The can lid 140 is made of, for example, a surface-treated steel plate (for example, tin-free steel) with a thickness of about 0.2 mm, which is coated on both sides (for example, with epoxy phenol resin), and is formed by a predetermined molding process (for example, a hole to form a drinking spout). The brightness can be obtained by processing (processing, 7-rung processing, punching).

The tape tab 142 can be obtained by laminating synthetic resin films on both sides of aluminum foil.

As shown in FIG. 5, this high-frequency induction heating device includes an upper support device 144, an upper press roll 146 constituting a first suppression device, a lower support device 148, and a lower support device 144 constituting a first press device. A suppression device 150 is provided.

The upper support device 144 includes a fixed support plate 160, a movable support plate 162 installed on the fixed support plate 160 so as to be movable in the vertical direction, and a bearing 164 installed on the movable support plate 162.
．． 166 and a support body 152, and the first and second terminals 15 supported by the support body 152 so as to be movable in the axial direction (horizontal direction in FIG. 5) but not rotatable around the axis.
4,156.

The movable support plate 162 has a fixed support plate 160 extending upward.
bottle 172.174 passing through hole 168.170 of
A fixed support plate 160 and a movable support plate 16 are provided.
A spring 176 is disposed between the movable support plate 162 and the movable support plate 162 downwardly. The pins 172, 174 are provided with enlarged portions 180, 182 to limit downward movement of the movable support plate 162.

The first and second terminals 154 and 156 are electrically insulated from each other by an insulator +57, are integrally configured, and are connected to a high frequency power source P.

A spring 158 is arranged between the first and second terminals 154, 156 and the support 152, and the first and second terminals 154, 156 are connected to the upper pressure roll 146 (the fifth
(towards the left in the figure).

The upper press roll 146 includes an inner roll portion 184 and an outer roll portion 186.

The inner roll portion 184 is made of an insulating material and has seven flange-like portions 188 with a large diameter in the center, and a shaft portion 190 at one end is rotatably supported by the bearing 164.

The outer roll part 186 is integrally formed with the inner roll part 184 from a conductive material, and has a disc-shaped first feeding electrode part 192.
, a first coil portion 194 , and a shaft portion 196 .

The first coil portion 194 has a curved, substantially rectangular cross section as shown in FIG. is located adjacent to.

The first coil portion 194 and the protrusion 198 are covered with an insulator 200 as shown in FIGS. 5 and 6.

A fourth feeding electrode portion 204 is fixedly provided on the outside of the shaft portion 196 of the outer roll portion 186 via a tubular insulator 202 . This fourth feeding electrode section 204 is rotatably supported by a bearing 166.

As described above, the first and second terminals 154 and 156 are forced toward the upper pressure roll 146 by the spring 158, so that even when the upper pressure roll 146 rotates, the shank 196 of the outer roll portion 186 is the first terminal 1
54 to maintain electrical connection therebetween;
The fourth feeding electrode part 204 is in pressure contact with the second terminal 156,
Electrical connections between them are also maintained.

The lower support device 148 includes a fixed support 206 and two rails 208 installed on the fixed support 206.

The lower pressing bag [150 includes a support plate 212 made of an insulator, a fitting part 214 fixed under the support plate 212, a conductive part 216 made of a conductive material fixed on the support plate, and a conductive part 216 made of a conductive material fixed on the support plate. and an insulating support portion 218 fixed on portion 216 .

The fitting portion 214 fits into the rail 208 of the downward support device 150 to enable movement of the downward restraint device 150 along the rail 208.

The conductive part 216 connects the second feeding electrode part 220 and the third feeding electrode part 220 on both sides.
A feeding electrode section 222 and a second coil section 224 at the center.

As shown in FIG.
It is formed as a rectangular parallelepiped that extends along the entire length of the downward pressing device 150 in the left-right direction in the figure, and the second feeding electrode section 220 is similarly configured.

The second coil portion 224 is configured as an elevated portion from the support plate 212 and has a cross-sectional area of reduced width and thickness. Therefore, the current density flowing here is high.

A lid 140, which is an object to be heated, is placed on the insulator support portion 218.
is placed. Therefore, the upper surface of the support portion 218 is
0, and has a protrusion 226 that matches the hole (sip) of the lid. With this, the lid 140
is arranged on the support part 218 at a predetermined position and in a predetermined arrangement direction.

Since the structure is as described above, the downward pressing device 15
0 in the direction from left to right in FIG. and the second feeding electrode section 220 of the downward pressing device 150
and the third feeding electrode section 222, respectively. As a result, from the high frequency power supply P, the first terminal 15
4, first coil part 194, first feeding electrode part 192, second feeding electrode part 220, second coil part 224, third m
tm part 222, M 4 no M [ff1ffl 204,
A current begins to flow to the high frequency power supply P via the second terminal 156 and the second terminal 156 .

When the lower pressing device 150 is further moved to the right in FIG. 6, the upper pressing roll 146 rotates counterclockwise to sequentially press the tape tabs 142 against the lid 140,
Then, the portion of the lid 140 sandwiched by the second coil portion 194° 224 is heated to thermally bond the tape tab 142 to the lid 140.

If it buds, the tape tab 142 will be the 6th r! ! In the part indicated by A of J, it is not glued to the lid 140 and provides a part to be grasped with a finger, and in the part indicated by B it is glued to the lid, and the lid 140 is
The hole must be sealed.

In order to bond in this way, the first and second coil parts 1
94.220 is the lid 140 at the position corresponding to B.
and the tape tab 142. or,! 1 and l$2 coil part 194.22
When the part indicated by B is placed between 0 and 0, a switch not shown is operated to apply a current, and it is bonded at B.
In A, it is also possible to avoid adhesion. Furthermore, the current can also be controlled by forming part of the outer periphery of the feeding electrode section with an insulating material.

Furthermore, by adjusting the magnitude of the current from the high frequency power supply P,
Lid 140 when tape tab 142 is pressed against M140
, thereby allowing the adhesive strength of the tape tab 142 to be varied depending on the position of the tape tab 1.42. Varying the adhesive strength of the tape tab 142 depending on the position is necessary, for example, to maintain the sealing property of the drinking spout during transportation and to meet the requirements that the tape tab 142 can be easily peeled off.

Further, one end of the first coil section 194 is connected to the first feeding electrode section 220 as shown in FIG. 5, and the other end is connected to the high frequency power source P via the rail 208, for example. It can also be configured as follows. In this case, the third and fourth feeding electrode sections 222, 204 can be omitted.

However, with the configuration shown in FIG. 5, the first and fourth feeding electrode sections 192.204 are in pressure contact with the second and third feeding electrode sections 220.222, so the first and fourth feeding electrode sections 192.204 are in pressure contact with the second and third feeding electrode sections 220. @2
The spacing between the coil portions 194 and 224 of is precisely determined,
Since the object to be heated is pressed between the insulator 2°O and the support part 218, the first and second coil parts 194,
224! -1 The distance between the heated object and the object to be heated is determined accurately. Therefore, this configuration is preferable because it allows precise temperature control.

(Third Embodiment) Next, a high frequency induction heating apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 8 to 11.

This high frequency induction heating device can be used, for example, for a can 2 having a bottom.
30 (FIG. 8) is used for thermal transfer printing on the sides.

The can 230 is formed by drawing and ironing a tin material, for example, and the sides are painted white.

The thermal transfer film 232 is, for example, No. 11C1: As shown, the base film 01 made of PET film is used.
．． Easily peelable layer 302 made of hot melt, printed layer 303
, and an adhesive layer 304.

This high frequency induction heating device has the following and eight cans 230
By pressing and heating thermal transfer film 232 , printing layer 303 is separated from base film 301 and adhered to the sidewall of can 230 . The high-frequency induction heating device includes a lower support device 234, a lower press device 236 constituting a first press device, an upper support device 238, and an upper press roll 240 constituting a second press device.

The lower support device 234 includes a fixed support 242 and a cylindrical fitting member 244 provided on the upper surface of the fixed support 242.

The downward pressing device 236 includes a support plate 246 and a support plate 246.
first and second conductive portions 250 and 252 provided thereon and insulated from each other by an insulator 248;

Four pins 254 extending downward are provided on the lower surface of the support plate 246, and these pins 254 fit into the fitting members 244 of the fixed support base 242 as described above. As a result, the support plate 246 can be moved in the vertical direction, or cannot be moved in the front, back, left and right directions.

As shown in the figure, a compression spring 256 is disposed between the fixed support base 242 and the support plate 246.
6 is elastically supported.

The support plate 246 can be moved to an upper position and a lower position a short distance apart by a cam mechanism (not shown).

The first conductive section 250 includes a first terminal 258, a first coil section 260, and a first feeding electrode section 262.

The first coil portion 260, as shown in FIG. The other end is connected to a first feeding electrode part 262, and as described below, the first feeding electrode part 262 also has a plurality of electrodes separated by a narrow groove 264. It consists of parts.

An insulator layer 270 is provided on the upper surface of the first coil section 260, as shown in FIGS. 8 and 9.

The second conductive section 252 includes a fourth feeding electrode section 272 and a second terminal 274.

The upper support device 238 includes a fixed support plate 276 and two rails 278 provided on the lower surface of the fixed support plate 276.
The support body 282 is provided with a fitting part 280 that fits into these rails 278 on the upper surface, and a bearing 284 is supported by the support body 282 and rotatably supports the upper press roll 240.

The upper pressing roll 240 is a ring-shaped second feeding electrode part 2
86, a second coil portion 288, a solid shaft portion 290,
A disk-shaped third feeding electrode part 292 and an M3 feeding electrode part 29
2 and an integral shaft body 294.

The second feeding electrode portion 286, the second coil portion 288, the solid shaft portion 290, and the third feeding electrode portion 292 are formed of an integral conductive material, and the second feeding electrode portion 286, the second coil portion 288, the solid shaft portion 290, and the third feeding electrode portion 292 are An insulator 296 is provided between the portion 286 and the third feed electrode portion 292, and supports the second feed electrode portion 286 so as not to shift.

The second feeding electrode section 286 and the third feeding electrode section 292 have outer peripheries of the same diameter and are in contact with the first feeding electrode section 262 and the fourth feeding electrode section 272 of the downward suppression device 236, respectively. The upper press roll 240 including these rotates as one unit.

This high frequency induction heating device operates as follows.

First, the downward pressing device 236 is maintained at a low position by a cam mechanism (not shown). The thermal transfer film 232 is placed on this downward pressing device 236 with the base film 301 facing down.

On the other hand, the can 230 is fitted into the upper pressing roll 240, and the upper pressing roll 240 is moved to the ninth position of the lower pressing device 236.
The first and second terminals 258.2 are located at the left end of the figure.
74 to the high frequency power source P, release the cam mechanism, move the upper press roll 240 to the right, and connect the first feeding electrode section 262, the fourth feeding electrode section 272, and the second feeding electrode section. The portion 286 and the third feeding electrode portion 292 are brought into pressure contact. Thereby, from the high frequency power supply P, the first terminal 258, the first coil part 260, the first feeding electrode part 262, the second feeding electrode part 286, the second coil part 288, the solid shaft part 290
, a high-frequency current flows through the high-frequency power supply P via the third feeding electrode section 292, the fourth feeding electrode section 272, and the second terminal 274. As described above, the first coil portion 260 of the downward pressing device 236 has a plurality of conductive bands 26 formed by the narrow grooves 264.
6 and the first feeding electrode part 26 accordingly.
2 is also separated, so that current flows only through the conductive band 266 below the portion where the can 230 and the thermal transfer film 232 are in contact. As the upper press roll 240 is moved to the right, the upper press roll 240 rotates clockwise, and the cans 230 are successively pressed against the thermal transfer film 232, and the portion of the can 230 that is in contact with the thermal transfer film 232 is heated. Ru. The thermal transfer film 232 is sequentially compressed and heated, whereby the base film 301 and the printing 1130.3 are separated in the easily peelable layer 302, the adhesive layer 304 is melted, and the printing layer is adhered to the can 230. That will happen.

The upper pressing roll 240 reaches the right end in FIG.
A printing layer is wrapped around the entire circumference. The can 230 with the printed layer wrapped thereon is then removed, a new can 230 is attached to the upper pressure roll 240, and the process as described above is performed again.

(Fourth Embodiment) Next, referring to FIG. 12, a high frequency induction heating device according to a fourth embodiment of the present invention will be described.

This high frequency induction heating device includes a lower support device 320 and a first press roll 322 supported by the lower support device 320.
and a third press roll 324, an upper support device 326, and a second press roll 3 supported by the upper support device 326.
28 and a fourth press roll 330.

The lower support device 320 is axially supported by a fixed support 332, two pairs of bearings 334 and 336 (only one side bearing is shown) supported by the fixed support 332, and supports 338 and 340, respectively. 339 and 341
A first terminal 342 and a second terminal 344 are rotatably supported around the terminal.

The bearing 334 is a bearing on the other side (i.e., a first
The bearing 336 rotatably supports the first pressure roll 322 together with the bearing located on the front of the 12th roll (i.e., the bearing located on the front of the 12th roll), and the bearing 336 rotatably supports the first pressure roll 322 together with the bearing on the other side (not shown) (i.e., the bearing located on the front of the 12th roll). The press roll 324 is rotatably supported. For example, the bearing 334 and the bearing 336 are electrically insulated, thereby electrically insulating the ml press roll 322 and the third press roll 324.

The first and second terminals 342 and 344 are connected to the high frequency power source P, and are pressed into contact with the first pressure roll 322 and the fourth suppression roll 330, respectively, by a pressure device (not shown). Preferably, the pressure contact portion of the terminal is made of a brush and is configured to appropriately perform electrical connection and sliding.

The first pressing roll 322 presses the first terminal 3 as described above.
42 is in pressure contact with an inner roll part 346 made of a conductive material, an outer roll part 348 made of an insulator,
It includes a first feeding electrode part 350 that is integrated with the inner roll part 346. This inner roll part 346 constitutes a coil part, inside of which a flow path 352 through which cooling water flows is formed, and the outer surface of the outer roll part 348 constitutes a pressing surface.

The third press roll 324 includes an inner roll part 354 made of a conductive material and an outer roll part 3 made of an insulator.
56, and fourth and fifth feed electrode portions 358 and 360 formed of a conductive material integral with the inner roll portion 354. This inner roll part 354 constitutes a coil part, in which a flow path 362 through which cooling water flows is formed, and the outer surface of the outer roll part 356 constitutes a pressing surface.

The upper support device 326 includes a fixed support plate (not shown) and a movable support plate 36 supported by the fixed support plate so as to be movable in the vertical direction.
4, a spring (not shown) that forces the movable support plate 364 downward, and two pairs of bearings 366 and 368 installed on the movable support plate 364 (only the negative side bearing is shown).
and.

The bearing 366 is a bearing on the other side (i.e., a first
The bearing 368 rotatably supports the second pressing roll 328 together with the bearing located on the front of the 12th roll (i.e., the bearing located on the front of the 12th roll), and the bearing 368 rotatably supports the second pressing roll 328 together with the bearing on the other side (not shown) (i.e., the bearing located on the front of the 12th roll). The press roll 330 is rotatably supported. For example, bearing 366 and bearing 368 are electrically insulated, thereby electrically insulating second pressure roll 328 and fourth pressure roll 330.

The second press roll 328 has an inner roll part 370 made of a conductive material and an outer roll part 3 made of an insulator.
72, and second and third feed electrode portions 374 and 376 formed of a conductive material integral with the inner roll portion 370. This inner roll part 370 constitutes a coil part, in which a flow path 378 through which cooling water flows is formed, and the outer surface of the outer roll part 372 constitutes a pressing surface.

The second feeding electrode section 374 is pressed against and electrically connected to the first feeding electrode section 3501 provided on the first press roll 322 . The third feeding electrode section 376
The fourth feeding electrode part 358 provided on the suppression roll 324 of
It is pressed into contact with and is electrically connected to this.

The fourth press roll 330 includes an inner roll part 380 made of a conductive material to which the second terminal 344 as described above is in pressure contact, an outer roll part 382 made of an insulator, and an inner roll part 380 made of an insulating material. and a sixth feeding electrode section 384 that is integrated with the sixth feeding electrode section 384. This inner roll part 380 constitutes a coil part, inside of which a flow path 386 through which cooling water flows is formed, and the outer surface of the outer roll part 382 constitutes a pressing surface. The sixth feeding electrode section 384 is connected to the third press roll 3
24, and is electrically connected thereto.

By being arranged in this way and connecting the first terminal 342 and the second terminal 344 to the high frequency power source P, the first
terminal 342, the inner roll part 346 of the first press roll 322, and the first feed electrode part 3501, the second press roll 3
28 of the second feeding electrode part 374, the inner roll part 370 and the third feeding electrode part 376, and the fourth of the third pressing roll 324.
The second terminal 3
A high frequency current flows through 44.

With the arrangement as described above, and as shown in FIG. or by rotating the steel plate 388 and the synthetic resin film 39.
By pulling 0 from the downstream side, the steel 1388 is sequentially heated, and the synthetic resin film 390 is pressed against the steel plate 388, thereby thermally bonding them together.

(Fifth Example) Next, a high frequency induction heating apparatus according to a fifth example of the present invention will be described with reference to FIG.

This high-frequency induction heating device includes an upper support device 400 that is fixedly installed, a first press roll 402 and a second press roll 40 that are rotatably supported by the upper support device 400.
4. Third press roll 406 and fourth press roll 40
8, a lower support device 410, and four pressure rolls 412, 414, 416 rotatably supported by the lower support device.
．． 418.

The first pressure roll 402 includes an inner roll portion 420 made of a conductive material and an outer roll 422 made of an insulator and fixed to the inner roll 420. A flow path 424 through which cooling water flows is formed in the inner roll portion 420 . Second, third and fourth press rolls 404, 4
06,408 is configured similarly to the first press roll 402.

A first terminal 426 is in pressure contact with the left end of the first press roll 402 on the left side in FIG. 13, and these terminals are electrically connected. At the right end portions of the first press roll 402 and the second press roll 404, a 1' feeding electrode section 428 is provided.
are pressed together to electrically connect them. A second feeding electrode section 430 is in pressure contact with the left end portions of the second press roll 404 and the third press roll 406 to electrically connect them. A third feeding electrode section 432 is in pressure contact with the right end portions of the third press roll 406 and the fourth press roll 408, electrically connecting them. A second terminal 434 is in pressure contact with the left end of the fourth press roll 408, and these terminals are electrically connected. It is preferable that the pressure contact portion of the terminal and the feeding electrode portion be made of a brush and configured to appropriately perform electrical connection and sliding.

The lower support device 410 includes a fixed support (not shown) and a movable support plate 43 supported by the fixed support so as to be movable in the vertical direction.
5 and a spring (not shown) that forces the movable support plate 435 upward. It has two side walls extending above the movable support plate 435. These side walls constitute bearings for the pressure rolls 412, 414, 416, 418.

The first pressure roll 412 includes, for example, the inner roll portion 43
6 and an outer roll portion 438 formed of an insulator,
It is rotatably supported by the movable support plate 435 of the lower support body 410, and is forced upwardly by the spring (not shown) so as to come into pressure contact with the first pressure roll 402.

The other pressure rolls 414, 416, 418 are similarly constructed and arranged.

By being arranged in this way and connecting the first terminal 426 and the second terminal 434 to the high frequency power source P, the first terminal 426, the first pressing roll 402, the first feeding electrode part 428, Second press roll 404, second feed electrode section 430, third press roll 406, third feed electrode section 43
the second terminal 4 through the second and fourth pressing rolls 408
A high frequency current flows through 34.

With the arrangement as described above, and as shown in FIG. introduced between
By rotationally driving the pressure roll and a part of the pressure roll, or by rotating the steel plate 440 and the synthetic resin film 44.
2 on the downstream side, by pulling the steel plate 44
0 is heated between pressure rolls and pressed between the pressure rolls and the pressure rolls, thereby thermally bonding these.

In the illustrated embodiment, pressure rolls 412, 414.
Outer roll portion 43 formed of insulators 416 and 418
It has 8. Alternatively, the outer roll may be formed of metal arranged to be effectively inductively heated, and the pressure roll may also be configured to act as a heating roll.

In this case, it is preferable that the pressure roll and the heated body be electrically insulated, for example, by providing an insulating layer on the surface of the pressure roll. It is also possible to make the diameter of the pressure roll relatively large and arrange metal bands on the circumference that mutually form a plurality of current-carrying coils.

Further, instead of the pressure roll, a movable flat pressure device may be arranged.

(Sixth Embodiment) Next, a high frequency induction heating device according to a sixth embodiment of the present invention will be described with reference to FIG. 14.

This high-frequency induction heating device is different from the high-frequency induction heating device of the fifth embodiment described with reference to FIG. 13 in that the pressure roll and its support device are the same; are different.

FIG. 14 shows a view from below of this pressure roll and support device.

This high-frequency induction heating device includes an upper support device 450 that is fixedly installed, and a first support device supported by the upper support device 450.
Press roll 452 of f@2, press roll 454 of f@2, third
A press roll 456 and a fourth press roll 458 are provided.

The first pressure roll 452 is fixedly supported by the upper support 450 and has an inner shaft portion 460 formed of a conductive material.
and a rotating roll portion 462 that is rotatably disposed around an inner shaft portion 460 and is made of an insulating material.

A first terminal 464 is fixed to one end of the inner shaft portion 460 of the first press roll 452 . This first terminal 464 is connected to one side 466 of the upper support device 450.
The position is defined by an annular spacer 468 disposed between the first terminal 464 and the first terminal 464 , and a seven-lung portion 470 of the inner shaft portion 460 .

A first connecting portion 472 is fixed to the other end of the inner shaft portion 460 of the first press roll 452 . This first
The connecting portion 472 is connected to an annular spacer 474 disposed between the rotating roll portion 462 and the first connecting portion 472, and the other side 476 of the upper support device 450 and the first connecting portion 4.
72 and an annular spacer 478 disposed between the two.

Similarly, the second pressure roll 454 has a first connecting portion 47.
2 is fixed, thereby electrically connecting the inner shaft portion 460 of the first pressure roll 454 and the inner shaft portion 480 of the second pressure roll 456.

A second connection portion 482 is also fixed to the inner shaft portion 480 of the second suppression roll 454 . This second connection 48
2 is an annular spacer 486 disposed between one side 466 of the upper support device 450 and the second connecting portion 482;
and the seven rung portion 488 of the inner shaft portion 460.

The third pressure roll 456 is configured in the same manner as the second pressure roll 454, and similarly has a fixed second connection part 482, which allows the third pressure roll 456 to connect to the inner shaft part 480 of the second pressure roll 454. Inner shaft n490 of pressure roll 454 of No. 3
are electrically connected.

The third pressure roll 456 has a third connecting portion 492.
It is also fixed.

The fourth pressure roll 458 is constructed in the same way as the second pressure roll 454 and the third pressure roll 453, and similarly has a fixed third connection n492, which allows the third pressure roll 456 to The inner shaft portion 490 and the inner shaft portion 494 of the fourth press roll 454 are electrically connected.

A second terminal 496 is fixed to the fourth press roll 458 . This second terminal 496 is connected to the upper support device 4
an annular spacer 498 disposed between one side 466 of the 50 and the second terminal 496;
The position is determined by the flange portion 500 of the inner shaft portion 494 of 58.

A flow path for flowing cooling water is formed in each of the inner shaft portions of the pressure rolls, and one end of the flow path of the inner shaft portion 460 of the first suppression roll 452 is connected to a cooling water source by a connecting pipe 502. The other end is connected to one end of the flow path of the inner shaft portion 480 of the second suppressing roll 454 by a connecting pipe 504 . The other end of the flow path of the inner shaft portion 480 of the second pressure roll 454 is connected to the inner shaft portion 4 of the third pressure roll 456 by the connecting pipe 506.
90 is connected to one end of the flow path. Similarly, the other end of the flow path of the inner shaft portion 490 of the third pressure roll 456 is connected to one end of the flow path of the inner shaft portion 494 of the fourth pressure roll 458 by a connecting pipe 508. The cooling water is then discharged through the connecting pipe 510 connected to the other end of the flow path of the inner shaft portion 494 of the fourth press roll 458 . In this way, the pressure roll etc. can be effectively cooled.

By being arranged in this way and connecting the first terminal 464 and the second terminal 496 to the high frequency power source P, the first terminal 464 and the inner shaft portion 4 of the first press roll 452 are connected to each other.
60, inner shaft portion 480 of second suppression roll 454, third
The second terminal 49 is
A high frequency current flows through 6.

The press roll and its support device configured in this way,
It can be used instead of the press roll and its support device of the high frequency induction heating device according to the fifth embodiment shown in FIG.

In this aspect, for example, the first connecting portion 472 connects the inner shaft portion 460 of the first pressure roll 454 to the second
The inner shaft portion 480 of the pressure roll 456 is electrically connected. Instead of this, connecting pipes 504, 506, 508
It is also possible to construct the inner shaft portions of the pressure rolls from a conductive material and to electrically connect the inner shaft portions of the pressure rolls to each other.

(Modification) As described above, in the first to sixth embodiments, at least one of the pressing devices includes a pressing roll having a cylindrical pressing surface. Instead of such a pressing roll,
For example, it is also possible to use a pressure roll with a pressure surface of fan-shaped or semicircular cross section.

Also, for example, by sequentially rotating the pressure roll in two directions,
That is, it can also be configured to vibrate and press the object to be heated when rotating in one direction to heat it.

Effects According to the present invention, it is possible to provide a high-frequency induction heating device in which the pressing device of the cup 1 is constituted by a pressing roll, and the pressing roll can efficiently press and heat the object to be heated.

In the high frequency induction heating device of the present invention, the distance between the coil section and the heated object during heating is determined by, for example, the thickness of the insulator between the heated object and the coil section, and is accurately determined. Determined. Therefore, stable heating can be performed.

Furthermore, since the distance between the object to be heated and the coil section can always be maintained at an accurate value, the heating of the object to be heated can be accurately controlled.

Furthermore, since there is no or only a slight time lag between heating and suppression, even a device with extremely small heat capacity can be heated to an optimum temperature during suppression.

In the case of adhesion, only the minimum amount of heating is required; for example, there is no need to unnecessarily heat the metal plate and film to high temperatures.

According to the high-frequency induction heating device of the present invention, it is possible to sequentially heat a nearly linear region, and by sequentially controlling the amount of current, heating in the traveling direction can be easily controlled.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a high-frequency induction heating device according to a first embodiment of the present invention. FIG. 2 is a partially sectional front view of the high-frequency induction heating apparatus shown in FIG. 3 is a side view of a main part of a modified form of the upper press roll of the high-frequency induction heating device of FIG. 1; FIG. FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3. FIG. 5 is a partially sectional side view of a high frequency induction heating device according to a second embodiment of the present invention. 6 is a partially sectional front view of the high frequency induction heating device of FIG. 5. FIG. FIG. 7 is a plan view of the main parts of the high-frequency induction heating device shown in FIG. 5. FIG. 8 is a partially sectional side view of a high frequency induction heating device according to a third embodiment of the present invention. FIG. 9 is a partially sectional front view of the high-frequency induction heating device of FIG. 8. FIG. 10 is a plan view of the main parts of the high-frequency induction heating device shown in FIG. 8. FIG. 11 is a sectional view of a thermal transfer film bonded by the high-frequency induction heating device of FIG. 8. FIG. 12 is a partially sectional perspective view of a high-frequency induction heating device according to a fourth embodiment of the present invention. FIG. 13 is a partially sectional perspective view of a high frequency induction heating device according to a fifth embodiment of the present invention. FIG. 14 is a partially sectional bottom view of a high frequency induction heating device according to a sixth embodiment of the present invention. (First Example) IO...Lower support device 12...Lower press roll 14...Upper support device 15...Lower press roll 26...First terminal 28...Second Terminal 46...First feeding electrode part 48...First coil part 56...Fourth feeding electrode part 98...Second feeding electrode part 100...Third feeding electrode part 102... Second coil portion 108... Steel plate 110... Synthetic resin film (second embodiment) 144... Upper support device 146... Upper press roll 148... Lower support device 150 ...Downward press roll 154...First terminal 156...Second terminal 192...First feeding electrode part 194...First coil part 204...Fourth feeding electrode Part 220...Second feeding electrode part 222...Third feeding electrode part 224...Second coil part (third embodiment) 234...Downward support device 236...Downward pressing Device 238... Upper support device 240... Upper pressing roll 258... First terminal 260... First coil part 262... First feeding electrode part 272... Fourth feeding Electrode part 274...Second terminal 286...Second power feeding rod part 288...Second coil part 292...Third feeding electrode part (fourth example) 320... Lower support device 322...first pressure roller 324...third pressure roller 326...upper support device 328...second pressure roll 330...fourth pressure roll 342...First terminal 344...Second terminal 346...Inner roll portion 350 of the first pressure roll
...First feeding electrode part 354...Inner roll part 358 of the third press roll.
...Fourth feeding electrode part 360...Fifth feeding electrode part 374...Second feeding electrode part 376...Third feeding electrode part (fifth example) 400...Upper Support device 402...First press roll 404...Second press roll 406...Third press roll 408...Fourth press roll 410...Lower support device 426...No. 1 terminal 434...Second terminal (sixth embodiment) 450...Upper support device 452...First press roll 454...Second suppression roll 456, 458, 464, 496・ ・Third Press Roll・Fourth Press Roll・First Terminal・Second Terminal Fig. 4 Fig. 7 Fig. 10

Claims (1)

[Scope of Claims] 1. A first and a second pressing device are provided for pressing the object to be heated, the first pressing device is constituted by a pressing roll, and the pressing roll extends in the direction of the axis of rotation. The second pressing device includes a second coil portion disposed adjacent to and opposite to the first coil portion, and the second pressing device includes a second coil portion disposed adjacent to and opposite to the first coil portion. A high-frequency induction heating device characterized in that the second coil portion is electrically connected so that a high-frequency current flows in an opposite direction.