JPH11191486A - Induction heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the expansion of facility scale and the increase in facility costs, or to impart a proper heating pattern to a heating object in the time lapse direction. SOLUTION: By feeding high frequency power from a high frequency generator 10 to a power receiving fin 22g via a power feeding member 12 and a power feeding fin 12b, a material for ice cream cones provided between oppositely facing electrode is heated inductively. Plural carriage 22 which successively transfer the material for the ice cream cones sandwiches between the confronting electrodes are provided. A high frequency voltage is capacitively coupled between the power feeding 12b and the power receiving fin 22g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric heating apparatus for heating an object to be heated, such as food, wood, or plastic, by dielectric heating.

[0002]

2. Description of the Related Art There has been known an apparatus for dielectrically heating an object to be heated by applying a high frequency to the object to be heated sandwiched between plate-shaped opposite electrodes through the opposite electrode. This type of device initially has a simple structure consisting of a high-frequency generator for generating high frequency, an upper electrode configured to be able to move up and down, and a lower electrode fixed on the floor. there were.

[0003] When performing dielectric heating using this dielectric heating apparatus, the object to be heated is placed on the lower electrode with the upper electrode raised, and then the object to be heated is lowered by lowering the upper electrode. A so-called batch process has been adopted in which an operation of applying heat from a high-frequency generator and applying heat between the upper and lower electrodes and heating is repeatedly performed.

[0004] However, such batch processing is inferior in productivity. Therefore, the object to be heated is sandwiched between conveyor belts provided vertically facing each other, and the object to be heated is driven between the opposing electrodes by driving the conveyor belt. There has been proposed a continuous processing type dielectric heating apparatus which is configured to transfer and apply a high frequency from a counter electrode via a conveyor belt to the object to be heated during the transfer process to perform dielectric heating.

[0005]

However, in the above-described continuous processing type dielectric heating apparatus, a pair of vertically opposed conveyor belts for moving the object to be heated and a height dimension of the object to be heated are appropriately adjusted. Therefore, there is a problem that the scale of the dielectric heating device becomes excessively large and the equipment cost increases.

Further, in the above-mentioned continuous processing type dielectric heating apparatus, the length of the counter electrode may be sufficiently long so that a plurality of heat-treated products are sequentially transferred between the pair of counter electrodes to be processed in parallel. However, in this case, since a plurality of objects to be heated sandwiched between the opposed electrodes, that is, high-frequency supply is performed in a state where the high-frequency supply is performed with respect to the total average of a plurality of loads, However, high-frequency power supply that is consistent with load fluctuations due to the progress of the heat treatment is not always performed, and as a result, a new problem that it is difficult to perform appropriate heat treatment individually is raised. You.

[0007] The present invention has been made in view of the above situation, and by making the counter electrode movable,
It is an object of the present invention to provide a dielectric heating apparatus capable of suppressing an increase in equipment scale and an increase in equipment cost, or providing an appropriate heating pattern to a heating object in a time direction.

[0008]

According to the first aspect of the present invention,
A dielectric heating device for dielectrically heating an object to be heated interposed between the opposed electrodes by supplying high-frequency power from a high-frequency generator to the opposed electrodes via a relay section, and a transfer means for sequentially transferring the opposed electrodes The relay unit, the power supply side member disposed along the transfer direction of each counter electrode,
A power receiving side member that is connected to one of the opposing electrodes so as to face the power supply side member in a separated state during transfer, and that transmits high frequency power to the power supply side member when facing the power supply side member. The power supply side member and the power receiving side member,
It is characterized in that it is coupled so that the amount of electricity transmitted with respect to the transfer direction of the heating object changes.

According to the present invention, by sequentially transferring the plurality of counter electrodes by driving the transfer means, the power receiving side member of each counter electrode is sequentially connected to the power supply side member, and the high frequency from the high frequency generator is supplied to the power supply side. A predetermined dielectric heating process is applied to the object to be heated which is provided between the opposed electrodes via the member and the power receiving side member.

Since the power supply side member and the power reception side member are configured to be connected to each other in a state of being separated from each other, the members are not directly connected to each other, so that the power transmission structure is simplified, and In the case of connection, wear between members does not occur, and maintenance cost is reduced accordingly.

According to a second aspect of the present invention, in the first aspect, the coupling is capacitive coupling. According to the present invention, by capacitively coupling the power-supplying-side member and the power-receiving-side member, the power transmission structure has a simple configuration like a plate-like body, and the equipment cost is reduced.

According to a third aspect of the present invention, in the second aspect of the present invention, the power supply side member is formed in a shape in which a coupling capacity changes in accordance with a temporal heating pattern of an object to be heated. It is a feature. According to the present invention, the amount of electricity corresponding to the heating pattern can be transmitted by changing the facing area between the members over time. The shape of the power receiving member on the counter electrode side may be constant.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the power receiving side member is formed in a shape whose capacity changes according to a temporal heating pattern of an object to be heated. Is what you do. According to the present invention, the heating pattern is matched to the heating pattern of the object to be heated by having the power receiving side member corresponding to the type of the object to be heated, or by loading and transferring the object to be mounted on the counter electrode which is exchanged and attached. Dielectric heating is performed. Therefore, by sequentially serially transferring the counter electrodes provided with a plurality of types of power receiving members corresponding to a plurality of heating patterns, it is possible to perform a small number of types of heating processing in one processing line.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the transfer means transports a plurality of sets of counter electrodes at predetermined intervals.
The relay section is characterized in that it has at least a length dimension corresponding to a distance between each of the power receiving side members of two adjacent pairs of opposed electrodes. According to the present invention, a plurality of objects to be heated, which are moved by the drive of the transfer means, can be heated in parallel, and the processing efficiency is improved.

[0015]

FIG. 1 is a perspective explanatory view showing a first embodiment of a dielectric heating apparatus according to the present invention. In the first embodiment, the dielectric heating device is applied to an ice cream cone manufacturing device. As shown in FIG. 1, an ice cream cone manufacturing apparatus 2 includes an annular gantry 21 provided annularly on a floor F, and a plurality of carts that circulate on the annular gantry 21 to sequentially manufacture ice cream cones. 2
2, a raw material supply mechanism 23 for supplying raw materials for the ice cream cone to the carriage 22, a dielectric heating device 1 for applying high frequency to the raw materials loaded in the carriage 22, and firing the ice cream cone; And a discharge mechanism 24 for discharging the ice cream cone fired in the above to the outside of the system.

The annular frame 21 includes a pair of annular lower frames 21a laid on the floor F, a plurality of columns 21b erected on the lower frames 21a at equal pitches, and the columns 21b. And a pair of radial upper frames 21c supported in the radial direction. Each upper frame 21c is a rail 21 laid on the upper surface.
d, and each of the carts 22 travels on the pair of rails. Note that, in FIG. 1, only a portion of the annular gantry 21 related to the dielectric heating device 1 is partially illustrated, and other portions are omitted. Further, a plurality of trolleys 22 are annularly connected at regular intervals on the rails 21d, respectively, but FIG. 1 shows only a part and omits the others.

FIGS. 2A and 2B are perspective views showing an embodiment of the carriage 22. FIG. 2A shows a state in which the lower mold is closed, and FIG. 2B shows a state in which the lower mold is open. As shown in FIG. 2, the bogie 22 has a U-shaped bogie main body 2 in a front view.
2a, a pair of wheels 22b rotatably supported on the bottom surface of the bogie main body 22a in a front-rear direction (direction in which the rail 21d extends) around a pair of support shafts, and a width direction (of the rail 21d) of the bogie main body 22a. A pair of guide poles 22c erected on the upper edges of the pair of side walls
And a lower mold 2 disposed between side walls of the bogie main body 22a.
2d, an upper mold 22e detachably attached to the lower mold 22d, an elevating plate 22f which is raised and lowered while being guided by the pair of guide poles 22c, and is erected on the upper surface of the elevating plate 22f. A plurality of power receiving fins (power receiving side members) 22
g. The bogie 22 is configured such that the wheels 22b roll on the rails 21d, and
While being guided by 1d, it moves around on the annular gantry 21.

On both sides in the width direction of the elevating plate 22f, an insulating cylinder made of a tough and high-lubricating engineering plastic made of, for example, polytetrafluoroethylene resin or silicon resin is provided at a portion corresponding to the guide pole 22c. The body 221f extends vertically, and the guide pole 22c is slidably fitted into the insulating tubular body 221f.
Up and down smoothly while being guided by the
And the guide pole 22c are electrically insulated from each other.

On the other hand, a wire 21e is annularly stretched between the pair of rails 21d. This wire 21e
Is held at a predetermined position by a pair of drive rollers 21g that rotate in opposite directions by the drive of the electric motor 21f, and rotates clockwise as shown by the thin arrow in FIG. 1 by the rotation of the drive rollers 21g. ing.

Each of the carts 2 is connected to such a wire 21e.
2 are connected. More specifically, a connecting protrusion 22h projects downward from the bottom of the bogie main body 22a, and the lower end of the connecting protrusion 22h is fixed to the wire 21e by caulking or the like, whereby the wire 21e moves around. The carriage 22 moves around the rail 21d. In the first embodiment, the transfer means of the present invention is formed by the wire 21e, the electric motor 21f, and the drive roller 21g.

The lower mold 22d is formed by a pair of split molds 221d divided in the front-rear direction. In addition, as shown in FIG. 2B, an inverted semi-conical cavity 25a is formed in the upper part of the opposing surface of each cracking mold 221d so as to match the outer shape obtained by vertically dividing the ice cream cone into two. These cavities 25a are combined by the combination of the cracking molds 221d, so that an inverted conical cone cavity 25 is formed as shown in FIG.

The upper mold 22e corresponds to the shape of the cone cavity 25, and has a gap of a predetermined size formed between the upper mold 22e and the inner peripheral surface of the cone cavity 25 in a state of being loaded in the cone cavity 25. So that it is formed in an inverted conical shape. The gap is for loading a raw material for an earth cream cone. The upper mold 22e includes:
It is fixed to the lower end of a connecting rod 22i projecting downward from the lower surface of the lifting plate 22f.

The lower mold 22d is provided with each of the split molds 221d.
Are coupled to each other by a link mechanism (not shown), and are opened and closed in conjunction with the elevation of the elevating plate 22f.
Accordingly, the upper mold 22e moves up and down in accordance with the elevating and lowering of the elevating plate 22f, and is mounted in the cone cavity 25 as shown in FIG. The split molds 221d are separated from each other in the front-rear direction, as shown in FIG.

The elevating plate 22f is slidably fitted to a pair of elevating guide members 26, each having a C-shaped cross-section in the width direction, each of which is annularly laid along the annular frame 21 at each side in the width direction. Thus, it is supported by the lifting guide member 26. The elevation guide member 26 is set at a height position where the upper mold 22e is mounted on the cone cavity 25 in a portion of the annular gantry 21 corresponding to the dielectric heating device 1 (FIG. 2A). 2), the height level gradually increases on the downstream side of the dielectric heating apparatus 1, and at the time when the upper mold 22e reaches the discharge mechanism 24, the upper mold 22e completely comes out of the support 25 ((b) in FIG. 2). It is set to be. This height level of the elevating guide member 26 corresponds to the discharge mechanism 2.
4, the height level is gradually reduced downstream of the discharge mechanism 24, and returned to a low level again upstream of the raw material supply mechanism 23.

The raw material supply mechanism 23 is for loading a raw material for an ice cream cone made of a viscous fluid prepared by dissolving a mixture of flour and corn flour in water into the cone cavity 25, and is not shown. It has a raw material tank and loading means. Then, when the carriage 22 is introduced into the raw material supply mechanism 23 by the circulating drive of the wire 21e, the cone cavity 25 formed by the combination of the cracking mold 221d is formed.
The raw material for the ice cream cone is injected into the mold, and then the upper mold 22e descends, and the outer peripheral surface thereof and the cone cavity 25 are formed.
The raw material can be spread between the inner peripheral surface of the container.
The truck 22 loaded with the raw material by the raw material supply mechanism 23 is introduced into the dielectric heating device 1 by the orbital movement of the wire 21e, where the ice cream cone in the cone cavity 25 is subjected to a baking process by applying a high frequency. .

FIG. 3 is an explanatory view of the dielectric heating apparatus 1 shown in FIG. 1 as viewed from the side, and FIG. 4 is an explanatory view of the same as viewed from the front. As shown in these figures and FIG. 1, the dielectric heating device 1
A basic configuration including a high-frequency generator 10, a relay unit 11 for relaying a high frequency from the high-frequency generator 11 to a counter electrode, and a counter electrode for applying the high frequency from the relay unit 11 to the raw material of the ice cream cone. have. In the first embodiment, an upper mold 22e is applied as an upper electrode of the counter electrodes, and a lower mold 22d is applied as the lower electrode.

The relay section 11 includes a metal power supply side member 12 disposed along the direction of transfer of the counter electrodes, and a power receiving fin 22 protruding from a lift plate 22 f of the carriage 22.
g. The power supply side member 12 includes a top plate 12a which is long in the front-rear direction and four power supply fins 12b projecting downward from the top plate 12a and extending in the front-rear direction. . The three feed grooves 12 extending in the front-rear direction between the adjacent feed fins 12b
c are formed, and the three power receiving fins 22g are fitted into the corresponding power supply grooves 12c in a non-contact state with the respective power supply fins 12b.
2b and the receiving fin 22g form an electric capacitive coupling.

The power supply side member 12 includes the ring mount 2
1 and is supported by a support frame 27 constructed on the floor F so as to straddle the floor. The support frame 27 includes a pair of columns 27a erected in the front-rear direction with the annular frame 21 interposed therebetween, and a pair of long beams 27b in the width direction bridged between the tops of the front and rear columns 27a. It consists of a plurality of short beams 27c bridged between the long beams 27b. A connecting piece 27d made of an insulating material is hung down from the center of each short beam 27c, and the lower ends of these connecting pieces 27d are
The power supply-side member 12 is supported by the support frame 27 by being fixed to a.

The high-frequency generator 10 and the power supply side member 12
Are connected by a positive conductor 10a, and the negative conductor 10b is grounded. Therefore, when the carriage 22 from the raw material supply mechanism 23 is introduced into the support frame 27 by the circulating drive of the wire 21e, the power receiving fins 22g pass between the power feeding fins 12b in a non-contact state, and thereby the power receiving fins 12b and the power receiving fins 12b are received. The fin 22g is capacitively coupled,
Accordingly, the high frequency from the high frequency generator 10 is applied between the upper mold 22e and the lower mold 22d via the power receiving fin 22g, the elevating plate 22f, and the connecting rod 22i, and the ice cream cone loaded in the cone cavity 25 is formed. The raw material is fired.

In the first embodiment, as shown in FIG. 3, the vertical dimension of each power supply fin 12b is
In order to obtain a binding capacity corresponding to the heating pattern over time of baking of the ice cream cone raw material. Such power supply fins 12
b, as shown in FIG. 3, from the upstream side to the downstream side, the power supply start area R1, the water evaporation area R2, the transition area R3, and the curing area R
4 and a power supply stop area R5 are formed.

The power supply start area R1 is a portion where the power receiving fin 22g is first capacitively coupled to the power supply fin 12b when the carriage 22 is introduced into the support frame 27. The vertical dimension d1 of the power supply start area R1 is The shape is set in a substantially triangular shape so as to gradually increase toward the downstream side, so that the coupling capacity gradually increases as the carriage 22 advances from the start of capacitive coupling. By doing so, the load on the high-frequency generator 10 when the power receiving fins 22g are capacitively coupled to the power supply fins 12b is small, and the load gradually increases as the carriage 22 advances.
Can be prevented from suddenly fluctuating in load due to coupling to the power supply fins 12b, and stable high-frequency supply from the high-frequency generator 10 to the object to be heated is realized.

The water evaporation region R2 is in a state where the raw material of the ice cream cone has a large amount of water, that is, the dielectric constant δ.
Of the power supply fin 1
As the vertical dimension d2 of 2b, the maximum value of the vertical dimension d1 in the power supply start area R1 is adopted as it is. The raw material is strongly heated internally while the carriage 22 is moving in the water evaporation region R2, so that the water is actively evaporated and the proteins and carbohydrates in the raw material are almost gelled.

Next, the transition region R3 is a portion where the water in the raw material in the sol state is reduced and almost 100% of proteins and carbohydrates are gelled and burned up. , Gradually decreasing toward the downstream side. This transition area R
In 3, the raw material of the ice cream cone is brought to a state where approximately 90% of the degree of baking (water content is approximately 20%) is completed.

The curing area R4 is an area for further hardening the material which has been baked by about 90%, and the vertical dimension d4 of the power supply fin 12b is the minimum value of the vertical dimension d3 in the transition area R3. Has been adopted. Here is a trolley 2
During the passage of 2, the moisture in the raw material decreases to approximately 10%, and a hard film is formed on the surface of the ice cream cone that is in contact with the inner peripheral surface of the cone cavity 25 and the outer peripheral surface of the upper mold 22e. I am trying to be.

Further, the last power supply stop region R5 is provided corresponding to the time when the power receiving fin 22g comes out of the power supply fin 12b, and the vertical dimension d5 of the power supply fin 12b is set so as to gradually decrease toward the downstream end. Have been. Due to this shape, the power receiving fin 22g is
A sudden change in capacitance is prevented from occurring when the high-frequency generator 10 is deviated from the range, and the high-frequency generator 10 can be driven stably.

In the present embodiment, the power receiving fins 22g of the twelve trucks 22 connected in series to the power supply side member 12 are in a state of being capacitively coupled at one time. Since the high-frequency voltage from one high-frequency generator 10 is distributed according to the baking condition of the ice cream cone, high-frequency generators are arranged on the upstream side and the downstream side, respectively, as in the related art. It is possible to provide a single high-frequency generator 10 without employing a measure to make the high-frequency output different, and to perform a fine baking process on the ice cream cone, The effect on saving the equipment cost and the operation cost is great.

The upper mold 22e and the lower mold d on the carriage 22 may be opened and closed independently of the lift guide member 26 by the operation of the operator.

FIG. 5 shows a second embodiment of the dielectric heating apparatus according to the present invention.
It is a perspective explanatory view showing an embodiment. Also, FIG.
It is a perspective view which shows the dolly applied to the dielectric heating apparatus 1a of embodiment, (a) has shown the state where the upper metal mold | die went up, and (b) has shown the state where the upper metal mold | die fell. Further, FIG. 7 is an explanatory view of the carriage in a side view. In the second embodiment, the dielectric heating device is applied to a wood forming device. As shown in FIG. 5, the wood forming apparatus 3 includes an annular gantry 31 provided annularly on the floor F,
A plurality of trolleys 32 that circulate and move upward to sequentially form the wood W, a raw material loading mechanism 33 that loads the wood W into the trolley 32, and a dielectric heating device 1a that heats the wood W loaded into the trolley 32 And a discharge mechanism 34 for discharging the wood W out of the system
And a basic configuration including:

The annular frame 31 comprises a pair of annular lower frames 31a laid on the floor F, a plurality of columns 31b erected at equal pitches on the lower frames 31a, respectively, and the columns 31b. And a pair of annular upper frames 31c supported in the radial direction. Each upper frame 31c is a rail 31 laid on the upper surface.
d, and each of the carts 32 travels on the pair of rails. Note that, in FIG. 1, only a portion of the annular gantry 31 related to the dielectric heating device 1 is illustrated, and other portions are omitted. A plurality of trolleys 32 are annularly connected at regular intervals on the rails 31d, however, only a part is shown in FIG. 5 and the others are omitted.

The carriage 32 has a flat carriage body 32a.
In the front-rear direction (rail 31)
d extending direction) a pair of widthwise wheels 32b rotatably supported about a pair of support shafts, and the bogie main body 32a
A lower mold 32c laminated and fixed on the upper mold 32c;
The upper mold 32d is detachably mounted on the upper mold 32d.
Power receiving fins (power receiving side member) 3 erected on the upper surface of 2d
2e, a flat insulating member 32f interposed between the lower mold 32c and the upper mold 32d, and an insulating member 32f
And locking means 32g for locking the connected state of the lower mold 32c and the upper mold 32d which are connected via the lock. The truck 32 has a wheel 32b whose rail 3
By rolling on 1d, it moves around on the annular gantry 21 while being guided by the rail 31d.

On the other hand, a wire 31e is annularly stretched between the pair of rails 31d. This wire 31e
Is held at a predetermined position by a pair of drive rollers 31g rotating in opposite directions by the driving of the electric motor 31f, and rotates clockwise as shown by the thin arrow in FIG. 5 by the rotation of these drive rollers 31g. ing.

Each of the carts 3 is connected to such a wire 31e.
2 are connected. A connecting protrusion 32h projects downward from the bottom of each bogie main body 22a, and a lower end of the connecting protrusion 32h is fixed to the wire 31e. The bogie 32 moves around the rail 31d as the wire 31e rotates. It is supposed to. And in the second embodiment,
The wire 31e, the electric motor 31f and the driving roller 31
g forms the transfer means of the present invention.

The lower mold 32c plays a role of a lower electrode in the counter electrode according to the present invention, and is formed of a solid aluminum alloy, and as shown in FIG. While the central portion has a concave portion 321c in an arc shape in side view, the upper mold 32d serves as an upper electrode of the counter electrode according to the present invention, and has a lower surface portion having the above-described shape. Convex part 32 protruded corresponding to concave part 321c
1d.

The insulating member 32f has a concave surface 32.
The upper mold 32d is provided on the upper surface of the lower mold 32c before and after the lower mold 1c.
The lower surfaces of the upper and lower upper molds 32d abut against the insulating member 32f, thereby forming a molding space 35 for holding the wood W between the concave portion 321c and the convex portion 321d as shown in FIG. Is formed.

The above-mentioned wood W is obtained by laminating a plurality of rectangular single plates W1 formed by cutting a base wood via an adhesive layer W2. Before such a wood W is solidified into the adhesive layer W2, as shown in FIG.
By being placed on the upper surface of the lower mold 32c and being pressed by the lowering of the upper mold 32d by a pressing mechanism (not shown),
As shown in FIG. 6B, the wood W is loaded into the molding space 35 in a curved state.

The locking means 32g is for preventing the upper mold 32d from being separated from the lower mold 32c by the restoring force of the wood W loaded in the molding space 35,
The lock plate 321 is set in an L shape in a side view and has a flat plate shape.
g, and a claw piece 322g formed by bending the tip side at a right angle.

The locking means 32g has a pair of bearing portions 323g in the front-rear direction formed in a bifurcated shape, while bearings corresponding to the bearing portions 323g are provided on both sides in the width direction of the lower mold 32c. The protruding piece 322c is protruded, and the locking means 32g is configured such that the bearing protruding piece 322c is
The connecting shaft 36 is penetrated therethrough in a state where the connecting shaft 36 is sandwiched by 3 g, and is rotatably supported around the connecting shaft 36.

The lock plate 321g is connected to the connecting shaft 36 and the claw piece 3.
22g is set to a size obtained by adding the thickness of the wood W to the maximum vertical dimension of the convex portion 321d, whereby the locking means 32g is connected to the connecting shaft 36 with the wood W loaded in the molding space 35. By pivoting around and engaging the claw piece 322g with the upper edge of the upper mold 32d, separation of the upper mold 32d from the lower mold 32c is prevented.

An insulating plate 37 made of rubber or soft synthetic resin is attached to the inner surface of the lock means 32g, and the lock means 32 of the upper mold 32d is fixed.
A similar insulating plate 37 is also attached to a portion corresponding to g, so that the upper mold 32d is locked to the lower mold 32c by the locking means 32g, so that the two molds 32c, 32d are insulated. Like that.

The dielectric heating apparatus 1a includes an opposing electrode 4 composed of a lower mold 32c as a lower electrode and an upper mold 32d as an upper electrode, and a front and rear stand at the center in the width direction of the upper surface of the upper mold 32d. Receiving fin 32e extending in the direction, a power supply side member 4 for holding the power receiving fin 32e in a non-contact state, and a high frequency for applying a high frequency voltage to each of the dies 32c and 32d via the power supply side member 4 and the power receiving fin 32e. A generator 10 is provided.

As shown in FIG. 5, the power supply side member 4 is
The top plate 41 includes a rectangular top plate 41 and a pair of power supply fins 42 extending in the width direction from both sides of the top plate 41 in the width direction. Then, when the carriage 32 is moved forward, the power receiving fins 32e are connected to the pair of power supply fins 42.
The trolleys 32 can pass through the power feeding fins 42 as they are while the carriage 32 continues to advance.

The power supply side member 4 includes a pair of rails 3.
Portal structure 43 erected on floor F so as to straddle
It is supported by. The gate-shaped structure 43 is composed of a pair of width-direction columns 43a erected on the floor F with the rail 31 interposed therebetween.
And a beam member 43b bridged between the tops of these pillars 43a
It consists of At the center in the width direction of the beam member 43b, a connecting piece 44 made of an insulator such as a synthetic resin that is suspended downward is provided, and the lower end of the connecting piece 44 is By being fixedly connected to the plate 41, it is in a state of being attached to the beam member 43b.

In the second embodiment, as shown in FIG. 7, the power receiving fins 32e change the vertical dimension in the traveling direction of the carriage 32, thereby responding to the temporal heating pattern of wood forming. A coupling capacity is obtained. As shown in FIG. 3, such a power receiving fin 32e has a power supply start area R from the upstream side to the downstream side.
1 ', solidification accelerating zone R2', transition zone R3 ', curing zone R4'
And a power supply stop region R5 '.

The power supply start region R1 'is a portion where the power receiving fin 32e is first capacitively coupled to the power supply fin 42 when the bogie 32 is pulled to the gate-shaped structure 43. The dimension d1 'is set in a substantially triangular shape so as to gradually increase toward the downstream side, so that the coupling capacity gradually increases as the carriage 32 advances from the start of capacitive coupling. By doing so, a sudden change in load is eliminated, and stable high-frequency supply from the high-frequency generator 10 to the wood W is realized.

The solidification promoting region R2 'is a region where the liquid adhesive layer W2 solidifies by a chemical reaction, and corresponds to a state where the dielectric constant δ of the adhesive layer W2 is large. In this region, as the vertical dimension d2 'of the power supply fin 42, the maximum value of the vertical dimension d1' in the power supply start area R1 'is used as it is. In the solidification promoting region R2 ', the degree of overlap between the power receiving fin 32e and the power supply fin 42 is maximized, whereby the adhesive layer W2 is strongly heated by dielectric heating to promote solidification.

Next, the above-mentioned transition region R3 'is formed by the adhesive layer W
2 is a region in which the solidification is substantially completed and the dielectric constant gradually decreases, and the vertical dimension d3 ′ of the power receiving fin 32e gradually decreases toward the upstream side. In the transition region R3 ', the adhesive layer W2 is in a state of being substantially 90% solidified.

The curing area R4 'is an area for solidifying the remaining 10% of the adhesive layer W2 which has been solidified by about 90%, and the vertical dimension d4 of the power supply fin 42 is equal to the displacement area R3'. Is the minimum value of the vertical dimension d3. The adhesive layer W2 is completely solidified by applying a high frequency wave in the curing region R4 '.

Further, the last power supply stop area R5 'is provided corresponding to the time when the power receiving fin 32e comes out of the power supply fin 42, and the vertical dimension d5 of the power supply fin 42 is gradually reduced toward the downstream end. Is set. With this shape, when the power receiving fin 32e comes off the power feeding fin 42, a sudden change in capacitance is prevented from occurring,
Stable operation is realized.

After the bogie 32 has passed through the portal structure 43, the wood W loaded in the molding space 35 is formed by solidifying the adhesive layer W2 so that the curved state of each veneer W1 is maintained. Product. Such a molded product is used, for example, as a backrest of a chair.

According to the dielectric heating apparatus 1a of the second embodiment, since the shapes of the power supply fins 42e on the ground side and the power reception fins 32e on the trolley 32 which are relay members are changed, the power supply fins are changed. 42 is fixed, and the power receiving fins 32e are formed in a shape corresponding to the heating characteristics of the object to be heated. It is possible to correspond to an object, which is effective in reducing equipment costs.

The present invention is not limited to the above embodiment, but also includes the following contents.

(1) In the first embodiment, the dielectric heating apparatus 1 is applied to the manufacture of ice cream cones, which is one of the food industry fields. It is not limited to application only to other food industries, such as
The present invention can also be applied to heat cooking and heat sterilization of various foods. When performing heat cooking or heat sterilization, a food loading container may be employed instead of the lower mold 22d and the upper mold 22e.

(2) In the second embodiment, the dielectric heating apparatus 1a is applied to the wood forming apparatus 3 which is one of the wood industry fields. However, the present invention is applicable only to the wood forming field in the wood industry field. The present invention is not limited to the application, and can be applied to drying of wood, and particularly to bonding of ordinary wood without molding.

(3) In addition to the above-mentioned food industry and wood industry, the present invention provides
The present invention can also be applied to drying and molding of paper products, drying of medicines and herbs, bonding and molding of leather products, and the like.

(4) In the above embodiment, the coupling capacitance is changed depending on the facing area between the power supply side member and the power reception side member, but the separation distance between both members is changed along the transfer direction. You may do so. In addition, the opposing surfaces of both members are not limited to the method of sandwiching from both sides, but may be capacitive coupling in which one surface opposes each other.

(5) In the above embodiment, a predetermined amount of electricity is transmitted from the power supply side member to the power receiving side member by capacitive coupling. Instead of this, the amount of electricity is transmitted by magnetic coupling. It may be configured to be transmitted. That is, a coil formed by winding a U-shaped core into a direction in which both ends of the core intersect with the transfer direction of the object to be heated, and the directions are set so as to face each other, and the power supply side and the power reception side May be arranged in parallel in the transfer direction.

[0067]

According to the first aspect of the present invention, there is provided a transfer means for sequentially transferring the opposed electrodes to be subjected to dielectric heating to the interposed heating object via the relay section, and the relay section is provided for each of the opposed electrodes. The power supply side member arranged along the transfer direction is connected to one of the opposite electrodes so as to face the power supply side member during transfer, and high frequency power is transmitted between the power supply side member and the power supply side member at the time of opposition. The power receiving side member of each counter electrode is sequentially connected to the power supply side member by sequentially transferring a plurality of counter electrodes by driving the transfer means, and the high frequency from the high frequency generator is supplied to the power supply side. This is applied to the object to be heated interposed between the opposing electrodes via the member and the power receiving side member, whereby a predetermined dielectric heating treatment can be performed on the object to be heated.

Since the power-supplying-side member and the power-receiving-side member are connected to be separated from each other, the electrodes are not directly connected to each other. Min maintenance costs are reduced.

According to the second aspect of the present invention, since the power supply side member and the power reception side member are coupled by capacitive coupling, the power transmission structure can be simplified and the equipment cost can be reduced. It is effective in planning.

According to the third aspect of the present invention, since the power supply side member is set to have a shape in which the coupling capacity changes in accordance with the temporal heating pattern of the object to be heated, the coupling capacity in accordance with the temporal heating pattern is set. As the shape of the power supply side member that is realized, there are those that set the shape in plan view, those that set the shape in side view, and those that use both of them, and those that set the shape in plan view are: Depending on the size of the area of the overlapping part of the supply and demand members, the one that sets the shape in side view depends on the separation distance between the supply and demand members, and the combination of both uses both the size of the area and the separation distance. Therefore, it is possible to perform heating control over time in accordance with the processing characteristics of the object to be heated simply by moving the counter electrode, and it is not necessary to use a control means such as a computer, thereby reducing equipment costs. It is possible to realize a Fight.

By preparing in advance a plurality of power supply-side members whose shapes are set in accordance with the type of the object to be heated, each time the object to be heated is changed, a plurality of types of power-supply-side members are exchanged simply by replacing the power supply-side member. Can be applied to the heat treatment of the object to be heated.

In particular, when the heating process using high frequency is a drying process or a melting process of the object to be heated, the dielectric constant of the object to be heated greatly changes due to a change in the heating state according to the progress of the process (ie, The impedance of the load changes), and conventionally, in order to cope with this, the division of the electrode and the division of the tuning adjuster are performed, and moreover, a plurality of high-frequency generators are employed, which causes a great cost. However, this inconvenience can be solved by the present invention.

According to the fourth aspect of the present invention, since the power receiving side member is set to have a shape whose capacity changes according to the temporal heating pattern of the object to be heated, the power receiving side member according to the type of the object to be heated is formed. By loading and transferring the object to be heated to the opposing electrode, it is possible to perform dielectric heating that matches the heating pattern of the object to be heated. Therefore, by sequentially transferring a plurality of types of counter electrodes corresponding to a plurality of heating patterns in series, it is possible to perform a small number of types of heating processing in one processing line.

According to the fifth aspect of the present invention, the relay unit is
Since the length is set to a length corresponding to the distance between each pair of adjacent opposing electrodes on the power receiving side, a high frequency can be simultaneously applied to a plurality of opposing electrodes moving by driving of the transfer means via the relay unit. , Whereby the processing efficiency of the object to be heated can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing a first embodiment of a dielectric heating device according to the present invention.

FIGS. 2A and 2B are perspective views showing an embodiment of a truck applied to the dielectric heating device shown in FIG. 1, wherein FIG. 2A is a state in which a lower mold is closed, and FIG. Are respectively shown.

FIG. 3 is an explanatory view of the dielectric heating device shown in FIG. 1 when viewed from a side.

FIG. 4 is an explanatory diagram of the dielectric heating device shown in FIG. 1 as viewed from the front.

FIG. 5 is a perspective explanatory view showing a second embodiment of the dielectric heating device according to the present invention.

6 is a perspective view showing an embodiment of a bogie applied to the dielectric heating device shown in FIG. 5, wherein (a) shows a state where the upper mold is raised, and (b) shows a state where the upper mold is lowered. Each state is shown.

FIG. 7 is an explanatory diagram of the carriage shown in FIG. 6 as viewed from a side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Dielectric heating apparatus 2 Ice cream cone manufacturing apparatus 21 Annular frame 21a Lower frame 21b Column 21c Upper frame 21d Rail 21e Wire 21f Electric motor 21g Drive roller 21h Annular frame 22 Cart 22a Cart body 22b Wheel 22c Guide pole 22d Lower mold 22e Upper die 22f Lifting plate 22g Power receiving fin 22h Connecting protrusion 22i Connecting rod 23 Raw material supply mechanism 24 Discharge mechanism 25 Cone cavity 26 Elevating guide member 27 Support frame 3 Wood forming apparatus 31 Rail 32 Carriage 32a Truck body 32b Wheel 33 Winch 33a Drum 33b Wire 33c Electric motor 4 Counter electrode 41 Lower electrode 42 Upper electrode 43 Power receiving fin 44 Power supply side member 44a Top plate 44b Power supply fin 45 Connection piece 5 Portal member 51 Support 5 Beam members

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takayuki Kurisaka 1-A22-103 Oroyamaro, Yawata-shi, Kyoto (72) Inventor Tsutomu Owada 5-5-1-217, Doumachi, Takatsuki-shi, Osaka (72) Inventor Shinji Tanaka 15-21-A206, Nyoze-cho, Takatsuki-shi, Osaka (72) Inventor Koji Yamamoto 6-3-12 Kamio, Tennoji-ku, Osaka Inside Yamamoto Binita Co., Ltd. (72) Tsuneo Nagata 6-shi, Tennoji-ku, Osaka 3-12-12 Yamamoto Vinita Co., Ltd. (72) Inventor Junichi Kodama 6-3-12 Kamishio, Tennoji-ku, Osaka City Yamamoto Vinita Co., Ltd.

Claims (5)

[Claims] 1. A dielectric heating device for dielectrically heating an object interposed between opposed electrodes by supplying high-frequency power from a high-frequency generator to the opposed electrodes via a relay section, wherein the opposed electrodes are electrically connected to each other. A transfer unit configured to sequentially transfer the power supply-side member disposed along the transfer direction of each of the opposing electrodes; A power receiving side member connected to one electrode side of the electrode and transmitting high-frequency power between the power feeding side member and the power feeding side member when facing each other, wherein the power feeding side member and the power receiving side member transfer the object to be heated. 2. The dielectric heating device according to claim 1, wherein the device is coupled so as to change the amount of electricity transmitted in the direction. 2. The dielectric heating apparatus according to claim 1, wherein said coupling is capacitive coupling. 3. The dielectric heating apparatus according to claim 2, wherein the power supply side member is formed in a shape in which a coupling capacitance changes according to a temporal heating pattern of an object to be heated. 4. The dielectric heating apparatus according to claim 2, wherein the power receiving side member is formed in a shape whose capacity changes according to a temporal heating pattern of the object to be heated. 5. The transfer means for transporting a plurality of sets of opposed electrodes at a predetermined interval, and the relay section has a length corresponding to a distance between each of the power receiving side members of two adjacent sets of opposed electrodes. 4. The dielectric heating device according to claim 1, wherein the dielectric heating device has at least a dimension.