JP2000292058A - Wood drying system and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an wood drying system in which wood can be heated both externally and internally while reducing design cost and installation cost. SOLUTION: The wood drying system comprises a furnace 2 for drying laminated woods carried in through a door 23 on one side face while controlling the temperature and humidity. A switching circuit section 8 for supplying high frequency for induction heating from a high frequency generator 60 through a matching circuit section 7 to first and second counter electrode sections clamping the laminated wood while switching is fixed, while being encased, to the outer side face having a long face of the drying furnace 2 except the door 23. The matching circuit section 7 is juxtaposed to the easing while being encased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined wood drying apparatus for drying wood by applying high frequency to wood while introducing heat and steam for drying into a drying chamber loaded with wood to be dried. And a method of manufacturing the same.

[0002]

2. Description of the Related Art It is known that wood is deformed with the progress of natural drying. If undried wood is processed and used, the dimensions will be out of order and the workpiece will be distorted. Usually, a drying treatment is performed prior to use. Since it takes a very long time to dry undried wood naturally, artificial drying in which drying treatment is completed in a few days has been adopted in recent years.

[0003] Forced drying includes a so-called external heating drying method in which a heat source such as steam is introduced into a drying chamber loaded with undried wood to supply heat to the wood from the outside. Is dried by applying a high frequency to the wood and dielectrically heating the wood from the inside, which is a so-called internal heating drying method. Since the internal heating and drying method is directly heated from the inside, the drying time is shorter than that of the external heating and drying method, and the dielectric heating method has been attracting attention for a long time.

[0004] By the way, wood cannot be dried simply by applying heat quickly. For example, if the drying environment is not at a predetermined humidity, cracks and distortions occur in the wood during drying. However, since the yield and commercial value of the obtained dried wood may be reduced, there is a limit to performing the drying treatment only by dielectric drying. Also,
If all the heat energy related to drying is to be covered by high-frequency heating, there is a problem that the energy cost is too high. For this reason, a so-called composite drying method in which the external heating drying method and the internal heating drying method are used in combination has been considered and has already been proposed.

[0005]

However, in the combined drying system, a drying oven in the external heating drying system and ancillary equipment for external heating such as a heater and a boiler, and a high-frequency oscillator used in the internal heating drying system, The design and construction must be performed so that the set of equipment for applying high frequency to wood with a matching circuit section and switching circuit section can operate effectively without positional interference with each other. And that the construction is difficult.

The present invention has been made to solve the above problems, and has a simple structure.
Wood drying equipment that can easily make a drying oven equipped with a combined drying method, thereby enabling both external heating and internal heating of wood while keeping design and construction costs low And a method for manufacturing the same.

[0007]

According to the first aspect of the present invention,
A wood drying device comprising a drying furnace for controlling the temperature and humidity of the laminated wood carried in from a door provided on at least one side surface of a rectangular parallelepiped container to perform drying, wherein the door of the drying furnace is provided. On the outer surface having a long surface except for the first counter electrode portion for holding and holding the laminated wood, which is a high frequency that can be dielectrically heated from a high frequency oscillator and is input through a matching circuit portion. A switching circuit section for switching and supplying the second counter electrode section is housed and mounted in a casing, and the matching circuit section is housed in the casing and provided adjacent to the casing. It is.

According to a seventh aspect of the present invention, there is provided a drying furnace for controlling the temperature and humidity of the laminated wood carried from a door provided on at least one side surface of a rectangular parallelepiped container to dry the laminated wood. At least a hole for electric wiring is drilled on the outer surface having a long surface, and a high frequency capable of dielectric heating is supplied through a matching circuit portion and a first counter electrode portion sandwiching the laminated wood is provided. A switching circuit unit for switching and supplying the switching circuit to the second counter electrode unit via an electric cable is housed in a casing to form a unit. The casing is attached to the side surface on which the hole is formed, and the switching circuit is connected via the hole. The electric cable from the section is guided into the furnace, the matching circuit section is housed in a casing to form a unit, and is provided adjacent to the casing of the switching circuit section. It is intended.

According to these inventions, the switching circuit section and the matching circuit section are housed in the casing to form a unit. Therefore, the casing of the switching circuit section is attached to a long outside surface other than the door of the drying oven, so that the mounting surface is provided. In addition, the drying furnace provided with the equipment for external heating and drying by providing the casing of the matching circuit part adjacent to the casing of the switching circuit part can perform internal heating and drying by dielectric heating.

[0010] As described above, a circuit part indispensable for efficiently performing internal heating and drying by high frequency is housed in a casing to form a unit, and only the side surfaces are concerned with each other. , The design and installation of these circuit parts in a drying furnace in which members for external heating are complicated are facilitated.

In particular, since the casing of the switching circuit section is attached to the long side except for the door of the drying furnace, the laminated wood obtained by laminating the long wood is loaded in the drying furnace. Electrical connection can be made at the shortest distance so that high frequency can be applied to the substantially central part in the long direction of the opposing electrode part holding the wood, and the influence of unnecessary inductance component and capacitor component is small. In addition, high-frequency application to the first and second counter electrode portions is realized uniformly.

When a high frequency is applied to the longitudinal end of the counter electrode, if the counter electrode is long (the counter electrode is set to a length corresponding to the length of wood (normally 3 to 4 m)). However, the frequency of the high frequency is very large, that is, the wavelength is very short. Such inconvenience is avoided by applying a high frequency to a substantially central portion in the longitudinal direction of the counter electrode.

In the first and seventh aspects of the present invention, the matching circuit portion is housed in a single casing to form a unit. As described in the fifth aspect, the matching circuit portion is a variable capacitor portion. And a variable inductance section, and they may be housed in separate casings to form a unit.

According to a second aspect of the present invention, there is provided a wood drying machine provided with a drying furnace for controlling the temperature and humidity of the laminated wood carried from a door provided on at least one side surface of a rectangular parallelepiped container to perform drying. In the apparatus, a first switching for switching and supplying a high frequency which is a dielectrically heatable high frequency from a high frequency oscillator and which is input via a matching circuit unit to a divided first laminated wood and a second laminated wood. A second switching circuit connected to an output side of the circuit section and the first switching circuit section for supplying high frequency to the first counter electrode section and the second counter electrode section for sharing and holding the first laminated wood; And a third switching circuit connected to the output side of the first switching circuit for switching and supplying a high frequency to a third counter electrode and a fourth counter electrode for holding and holding the second laminated wood. And the second And a third switching circuit portion is housed in the casing and is attached to an outer surface having a long surface except for the door of the drying oven, and the first switching circuit portion is housed in the casing and has the second and third switching circuits. The switching circuit is provided adjacent to the casing.

The invention according to claim 8 excludes the above-mentioned door of a drying furnace for controlling the temperature and humidity of the laminated wood carried in from a door provided on at least one side surface of a rectangular parallelepiped container and drying it. A first laminate in which at least a hole for electric wiring is formed in an outer surface having a long surface, and a high-frequency that can be dielectrically heated from a high-frequency oscillator and is input through a matching circuit unit is divided. A first switching circuit section for switching and supplying the wood and the second laminated wood is housed in a casing to form a unit, and connected to an output side of the first switching circuit section to hold and share the first laminated wood. First
A second switching circuit unit for supplying and switching a high frequency to the counter electrode unit and the second counter electrode unit via an electric cable is housed in a casing to form a unit. The unit is connected to an output side of the first switching circuit unit. (2) A casing is provided with a third switching circuit for supplying and switching a high frequency through an electric cable to a third counter electrode portion and a fourth counter electrode portion for holding and holding the laminated wood. The electric cables of the second and third switching circuits are guided into the furnace, and the casings of the second and third switching circuits are attached to the outer surface where the holes are formed. It is characterized by being provided adjacent to the casings of the second and third switching circuit sections.

According to these inventions, Claims 1 and 7
In addition to the operation of the invention described in the above, the switching circuit unit is divided into a second switching circuit unit for the first laminated wood and a third switching circuit unit for the second laminated wood, and each unit is formed. The attached casing is attached to the drying oven,
Even when a large amount of laminated wood is dried by a large drying furnace, if the number of switching circuits is one, it is necessary to extend the lead wire for supplying high frequency to the counter electrode for a long time. As a result, the effects of unnecessary inductance components and capacitor components are suppressed.

According to a third aspect of the present invention, there is provided a wood drying machine provided with a drying furnace for controlling the temperature and humidity of the laminated wood carried from a door provided on at least one side surface of a rectangular parallelepiped container to perform drying. A first switching circuit for switching and supplying a high frequency from a high frequency oscillator to a divided first laminated wood and a second laminated wood;
A second switch, which is connected to an output side of the switching circuit via a first matching circuit and switches and supplies a high frequency to a first counter electrode and a second counter electrode that hold and hold the first laminated wood. A high frequency is applied to a circuit portion and a third counter electrode portion and a fourth counter electrode portion which are connected to an output side of the first switching circuit portion via a second matching circuit portion and which hold and hold the second laminated wood. A third switching circuit section for switching and supplying the second and third switching circuits, wherein the second and third switching circuit sections are housed in a casing and are attached adjacent to an outer side surface having a long surface except for the door of the drying oven. The first switching circuit section and the first and second matching circuit sections are housed in casings, respectively, and are provided adjacent to the casings of the second and third switching circuit sections.

According to a ninth aspect of the present invention, there is provided a drying furnace for controlling the temperature and humidity of the laminated wood carried from a door provided on at least one side surface of a rectangular parallelepiped container and drying the laminated wood. In order to supply at least holes for electric wiring on the outer surface having a long surface and to switch and supply the high frequency capable of dielectric heating from the high frequency oscillator to the divided first laminated wood and the second laminated wood. The first switching circuit unit is housed in a casing to form a unit, and the first switching circuit unit is connected to the output side of the first switching circuit unit, and the first counter electrode unit and the second counter electrode unit for holding and holding the first laminated wood. A second switching circuit unit for supplying and switching a high frequency via an electric cable via a first matching circuit unit to a unit by being housed in a casing, connected to an output side of the first switching circuit unit, A third switching circuit unit that supplies and switches a high frequency via an electric cable to a third counter electrode unit and a fourth counter electrode unit that share and hold the material through a second matching circuit unit is housed in a casing to form a unit. Guiding the electric cables of the second and third switching circuits into the furnace through the holes, attaching the casings of the second and third switching circuits to the outer surface where the holes are drilled, and performing the first switching. The casing of the circuit section and the casings of the first and second matching circuit sections unitized by being housed in the casing, respectively, are provided adjacent to the casings of the second and third switching circuit sections. .

According to these inventions, in addition to the effects of the first, seventh and second and eighth aspects, the first and second matching circuit sections dedicated to the second and third switching circuit sections are employed, respectively. Therefore, a high frequency is supplied to the first laminated wood and the second laminated wood via the separately provided matching circuit unit, and the impedance is changed over time according to the situation of each laminated wood. This makes it possible to match the high-frequency output and realize a uniform drying process in which variations between layers in the drying process are suppressed to a small level.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the invention described in the above, two drying furnaces are arranged side by side, the second switching circuit section is attached to one of the drying furnaces in which the first laminated wood is loaded, and the other is loaded with the second dried wood. Wherein the third switching circuit section is attached to the drying oven.

According to the present invention, high frequency can be supplied to two drying ovens by one high frequency oscillator, which contributes to reduction of equipment cost.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the matching circuit section includes a variable capacitor casing in which a variable capacitor section for changing a capacity is accommodated in a casing; The variable inductance part which changes the variable inductance is constituted by a variable inductance casing housed in the casing.

According to the present invention, since the variable capacitor section and the variable inductance section, which are constituent elements of the matching circuit section, are housed in the casing to form a unit, these casings are arranged next to each other to form the matching circuit section. Is formed, and the degree of freedom of the installation layout is improved as compared with the case where the variable capacitor section and the variable inductance section are integrated.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the high-frequency oscillator comprises:
It is characterized by being installed on the outer surface side of the top plate of the drying oven.

According to the present invention, by installing the high-frequency oscillator on the top plate of the drying furnace, the installation space for the high-frequency oscillator on the site is saved.

According to the first to ninth aspects of the present invention, the laminated lumber sandwiched between the opposing electrodes has a plurality of crosspieces extending in a direction perpendicular to the longitudinal direction of the lumber. It is preferable to be laminated in a state. By doing so, the atmosphere air controlled at a predetermined temperature and humidity circulating in the drying oven flows between the wood and between the wood and the electrode. Is promoted, and better drying is realized. However, in the present invention, the use of the crosspiece is not essential, and the crosspiece may not be used depending on the situation.

[0027]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a wood drying apparatus according to the present invention, and FIG.
FIG. 2 is a sectional view taken along line AA of FIG. 1. FIG. 3 is a cross-sectional view of FIG.
It is a B sectional view. As shown in these figures, a wood drying apparatus 1 of the present invention includes a drying furnace 2 provided with a drying chamber for drying wood therein, and a high frequency applied to the wood being dried, which is attached to the drying furnace 2. A high-frequency section 6 for applying uniform and prompt drying is provided.

As shown in FIG. 1, the drying furnace 2 is formed of a rectangular parallelepiped box whose six surfaces are surrounded by walls. Metal frame members 21 are arranged at the ridge line portion of the drying furnace 2 and other appropriate places, and a rectangular parallelepiped skeleton is formed by the frame members 21.

A door frame 22 is provided on one side of the above skeleton, and the door frame 22 forms an entrance of a lumber (wood) R to the drying furnace 2.
In addition, a door (door) 23 having a heat insulating structure is provided on the door frame 22.
Is attached to open and close freely. The door 23 is provided with small holes 23a for ventilation and internal observation. In the present embodiment, the door 23 is provided on one of the two shorter walls (short wall surface) of the pair of opposed wall surfaces surrounding the drying furnace 2, but is limited to the short wall surface. Instead, it may be provided on a long wall surface.

An outer wall plate 24 and an inner wall plate 25 made of a thin metal plate are attached to the skeleton so as to sandwich the frame member 21. A heat insulating material 26 is provided between the outer wall plate 24 and the inner wall plate 25. Is filled. In the present embodiment, a galvanized color steel plate is applied to the outer wall plate 24 and the inner wall plate 25, and a 50 mm thick glass wool is used as the heat insulating material 26.

The interior of the drying furnace 2 has a floor surface 2
a, drying room 20 surrounded by inner wall surface 2b and ceiling surface 2c
Are formed. In this embodiment, the outer dimensions of the drying furnace 2 are 1.8 (the side on which the door 23 is provided).
m, depth 4.5 m, and height 1.8 m.

The inner wall surface 2b extending in the longitudinal direction of the drying chamber 20
On one side, a pair of fans 3 is attached in a longitudinal direction with the air blowing surfaces facing the center of the drying chamber 20. By driving the fan 3, the drying chamber 20 is driven.
The air inside circulates and moves, the sawmill R loaded into the drying chamber 20
It is designed to be dried. In the present embodiment, two fans 3 each having 0.75 KW are provided, and the two fans 3 can adjust the amount of air blow in the range of 60 to 180 m ³ / min.

On the inner wall surface 2b immediately below the fan 3 in the drying chamber 20, two steam heaters 4 arranged in the longitudinal direction are provided, and the atmosphere air in the drying chamber 20 circulating and moving is provided. It is designed to be heated.

A boiler 5 is attached to the outside of the drying furnace 2. The steam generated from the boiler 5 is introduced through a steam pipe 51 to a pressure pump 52 provided at the center of the upper surface of the drying furnace 2.
2 and is passed through a pair of steam branch pipes 53 to the drying chamber 20.
It is supplied inside.

In this embodiment, the boiler 5 is provided with an unillustrated safety valve, and the amount of steam generated by the boiler 5 is larger than the amount of steam supplied from the pressure pump 52 into the drying chamber 20. In some cases, excess steam is released from the safety valve to the outside.

In the case of the present embodiment, the boiler 5 has a capacity of 3.4.
A heater having a capacity of KW is built in, and by heating water with this heater, steam having a pressure of 3 kg / cm ² G at the maximum can be generated at a rate of 5.1 kg / hr. . Tap water or well water is directly supplied to such a boiler 5 via a predetermined hose or the like. A cartridge type water tank having a capacity of 5 to 10 liters may be provided. Further, a water softener is provided in the boiler 5, and water is softened by a predetermined operation, so that the generation of water scale in the boiler 5 is suppressed.

An exhaust pipe 54 communicating with the inside of the drying chamber 20 is provided at one corner of the upper surface of the drying furnace 2 so as to discharge atmospheric air in the drying chamber 20. Exhaust stack 54
Inside the exhaust pipe 54, co-rotating around a horizontal axis 54a.
A damper 55 for adjusting the opening degree of the motor is provided. Also,
An actuator 5 that changes the degree of opening of the damper 55 by rotating the horizontal shaft 54 a around the axis is provided on the upper surface of the drying furnace 2.
The opening degree of the damper 55 is adjusted by operating the actuator 56.

An exhaust fan 5 is provided below the exhaust tube 54.
7 (FIG. 2) is provided, and by operating the exhaust fan 57, the atmospheric air in the drying chamber 20 can be forcibly exhausted. In this embodiment, the exhaust fan 57 is provided with a motor capacity of 65 W and exhausts at a capacity of 18 m ³ / min.

In the drying furnace 2 described above, a pair of rails 27 in the width direction is drawn in from the outside through an opening on the floor surface 2a of the drying chamber 20. A large number of the carts can be put in and out of the drying chamber 20 in a state of being arranged and mounted on a lower minus electrode 63 described later as a carriage running on the cart 27.

The high-frequency section 6 includes a high-frequency oscillator 60 for outputting a high frequency of a predetermined frequency, a plurality of sets of opposing electrodes 61 for applying the high frequency from the high-frequency oscillator 60 to the lumber R, A matching circuit unit 7 interposed between the high-frequency oscillators 60 for matching the high-frequency output of the high-frequency oscillator 60 to the change over time in the dry state of the sawn material R, and applying a high-frequency to a plurality of sets of the counter electrodes 61 over time. And a switching circuit section 8 for sequentially switching. In the present embodiment, each electrode plate constituting the opposing electrode 61 is made of a plate made of aluminum or an aluminum alloy having a thickness of about 3 mm, but is shown thicker in the drawings for convenience of illustration.

The matching circuit section 7 includes a variable capacitor 71
And a variable inductance unit 7b provided with a variable inductance 75. In the present embodiment, the variable capacitor section 7a, the variable inductance section 7b, and the switching circuit section 8
Are housed in a casing 70 (a casing 70a for a capacitor, a casing 70b for an inductance, and a casing 70c for a switching circuit) to be unitized, so that they can be easily combined and arranged.

In the present embodiment, a gantry 70d for mounting the casing 70 is provided along the center of the long side wall of the drying furnace 2. Then, the switching circuit unit casing 70c is placed on the gantry 70d so as to contact the side wall surface of the drying furnace 2, and the capacitor casing 70a is arranged in parallel on the gantry 70d so as to contact the switching circuit unit casing 70c. With it placed,
An inductance casing 70b is placed on these. By employing such a gantry 70d, it is possible to prevent the bottom portion from being wet with water by directly placing the casing 70 on the ground, and to set the height positions of the later described cylinder switches 81 and 82 to the height positions of the plus electrodes 62 described later. In this way, the lead wire can be shortened, thereby suppressing an increase in inductance and stabilizing the matching.

The wiring hole 28 (FIGS. 3 and 5) is formed in the drying furnace 2 by arranging the switching circuit section casing 70c of the casing 70 particularly along the outer wall of the drying furnace 2. By passing a lead wire (connection plate X (FIG. 5)) through the wiring hole 28, the switching circuit casing 70c (that is, the switching circuit 8) can be easily added to the drying furnace 2. In addition, both the high-frequency oscillator 60 and the casing 70 are placed on the top plate of the drying furnace 2, only the casing 70 is placed on the top plate of the drying furnace 2, and the high-frequency oscillation as shown in FIG. The machine 60 can be placed on the top plate of the drying oven 2.

The high-frequency oscillator 60 and the matching circuit 7
Are connected by a coaxial cable 60a protected by a protection tube 60b. Therefore, the bulky high-frequency oscillator 6
The variable capacitor 71, the variable inductance 75, and the switching circuit unit 8 are housed in a unit while being disposed on an available site (FIG. 1) or on the top plate of the drying furnace 2. Capacitor casing 70
a, the inductance casing 70b and the switching circuit casing 70c are respectively installed adjacent to the drying furnace 2, and the high-frequency oscillator 60 and the matching circuit section 7 are connected to each other via a coaxial cable 60a.
The high-frequency unit 6 can be additionally installed on the drying furnace 2, and the design and installation of the variable capacitor 71, the variable inductance 75, and the switching circuit unit 8 on the drying furnace 2 are facilitated. The design and construction for adding the internal heating and drying method to the existing drying furnace 2 having only the external heating and drying method are also facilitated.

The counter electrode 61 is composed of a pair of upper and lower plus electrodes 62 made of a metal plate made of a conductive material such as an aluminum alloy.
(Lower positive electrode 62a and upper positive electrode 62b)
And a lower minus electrode 63 made of the same material and disposed below the plus electrode 62 via the lumber R;
It comprises an upper negative electrode 64 disposed at the upper position and a common negative electrode 65 interposed between the upper and lower positive electrodes. In the present embodiment, the lower positive electrode 62a, the lower negative electrode 63, and the common negative electrode 65 form the first counter electrode according to the present invention, and the upper positive electrode 62b and the upper negative electrode 6b.
4 and the common minus electrode 65 form a second counter electrode according to the present invention.

The lower negative electrode 63 is configured to serve as a truck for carrying the lumber R into the drying chamber 20, and four wheels provided at four corners of the lower surface thereof so as to roll on the rail 27. 63a. Therefore, by pressing the opposing electrode 61 on which the lumber R is mounted outside the drying chamber 20 toward the inside of the drying chamber 20, the lower negative electrode 63 moves while being guided by the rail 27, and moves.
Is loaded into the drying chamber 20.

In the present embodiment, as shown in FIG. 1, eight lumbers R arranged with a predetermined gap on the lower minus electrode 63 are arranged at a predetermined pitch so as to be orthogonal to these. Are stacked in a two-tiered manner via the plurality of crosspieces R1, the lower plus electrode 62a is stacked on top of these, and the lumber R is further stacked in a two-tiered manner on the lower plus electrode 62a in the same manner as described above. The first laminated lumber according to the present invention is formed by these lumbers R. Further, the material R is sandwiched between the common minus electrode 65 and the upper plus electrode 62b and between the upper plus electrode 62b and the upper minus electrode 64 in the same manner as described above. Two laminated woods are formed.

FIG. 4 is a circuit diagram showing one embodiment of the circuit configuration of the matching circuit section 7. As shown in FIG. Hereinafter, the matching circuit unit 7 will be described in detail with reference to FIG. 4 and FIG. First, FIG.
As shown in FIG. 6, the variable capacitor section 7a is housed in a capacitor casing 70a to form a unit, and the variable inductance section 7b is housed in an inductance casing 70b to form a unit.

The variable capacitor 71 changes the capacitance in accordance with the time-dependent change in the impedance of the lumber R being dried, and the variable inductance 75 does not reduce the current value even when the impedance of the lumber R changes over time. In this way, it adjusts its own inductance. Adjustment of the capacitor capacity and inductance by the variable capacitor 71 and the variable inductance 75 matches the impedance of the lumber R in the drying process, so-called matching is performed, and an efficient drying process is realized.

The variable capacitor 71 has a center electrode plate 72 fixed at a substantially central portion in the capacitor casing 70a so as to extend in the vertical direction, and a right electrode disposed on the right side of the center electrode plate 72 in FIG. It is composed of an electrode plate 73 and a left electrode plate 74 facing the left side.
The center electrode plate 72 is insulated from the capacitor casing 70a. Then, the first variable capacitor 71a shown in FIG.
Are formed, and the center electrode plate 72 and the left electrode plate 74 form a second variable capacitor 71b shown in FIG. The end of the coaxial cable 60a is the central electrode plate 7
2 are connected.

The right electrode plate 73 is grounded. The right electrode plate 73 is fixed to the end of the support rod 71c of the support member 71c having a horizontally movable support rod attached to the right side wall of the capacitor casing 70a at the upper and lower ends. The gap size can be changed. Further, an actuator 71 for moving or retracting the movable rod by electric power or hydraulic pressure is provided at an intermediate position in the vertical direction on the right side wall in the condenser casing 70a.
d is attached, and the distal end of the movable rod is fixed to the center position of the right electrode plate 73. Then, the center electrode plate 7 of the right electrode plate 73 by forward / reverse driving of the actuator 71d.
The capacitance of the first variable capacitor 71a can be changed by approaching and separating from the second variable capacitor 71a.

On the other hand, a support member 71c similar to that described above is provided on the left side wall in the capacitor casing 70a, and a left electrode plate 74 is fixed to the tip of a support rod of the support member 71c in parallel with the central electrode plate 72. The central electrode plate 7 is driven by the forward / reverse drive of the same actuator 71d provided on the wall.
2 approaching or separating from the second variable capacitor 71b, whereby the capacitance of the second variable capacitor 71b is changed. Actuator 71 of variable capacitor 71
d, The drive motor of the variable inductance 75 is driven according to the impedance change on the sawmill R side, so that the high-frequency oscillator 60 side always matches.

The variable inductance section 7b is housed in an inductance casing 70b to form a unit. The variable inductance section 7b has a variable inductance 75. The variable inductance 75 is formed between an inverted U-shaped lead wire plate 76 having a predetermined width and having a predetermined width, which is housed in an insulated state in the inductance casing 70b, and a surface of the inverted U-shaped lead wire plate 76 facing each other. A sliding contact bridging member 77 bridged in a sliding contact state, a rack rod 78 having a rack on one surface, which is erected at the upper center of the sliding contact bridging member 77, and a sliding contact bridging through the rack rod 78. It comprises lifting drive means 79 for raising and lowering the member 77.

The lower right end of the lead wire plate 76 is electrically connected to the left electrode plate 74, and the lower left end is connected to a U-shaped lead wire plate 83 described later. As a result, the effective length (length of the portion where the high frequency flows) of the inverted U-shaped lead wire plate 76 is determined by the opposed portions below the sliding contact bridging member 77.

The elevation drive means 79 comprises a drive motor (not shown) and a pinion 79a which rotates around an axis by driving the drive motor. The pinion 79a is meshed with the rack rod 78, and the rack rod 78 is moved up and down by the forward and reverse rotation of the pinion 79a driven by the drive motor, whereby the effective length of the inverted U-shaped lead wire plate 76 is raised and lowered by the sliding contact bridging member 77. Is set.

The switching circuit 8 is housed in a switching circuit casing 70c to form a unit.
A U-shaped lead wire plate 83 electrically connected to the lower left end of the U-shaped lead wire plate 76, and a first cylinder switch 81 and a second cylinder switch 82 electrically separated from and connected to the U-shaped lead wire plate 83 It consists of The U-shaped lead wire plate 83 is fixed to the right side wall of the switching circuit portion casing 70c in an insulated state so as to extend in the vertical direction via predetermined metal fittings.

The U-shaped lead wire plate 83 includes an upper contact plate 83a extending leftward from an upper edge so as to face the first cylinder switch 81 below and a second cylinder switch 82. And a lower contact plate 83b extending leftward from the lower edge so as to face upward. On the other hand, each of the cylinder switches 81 and 82 has a contact rod 84 which comes out of the main body and separates from the contact plates 83a and 83b.

On the other hand, inside the drying furnace 2, as shown in FIGS.
A contact member 85 protruding from the contact member is provided. The contact member 85 includes a plus contact member 86 facing the plus electrode 62, a lower minus contact member 87 facing the lower minus electrode 63, an upper minus contact member 88 facing the upper minus electrode 64, and a common minus electrode 65. And a common negative contact member 89 opposed to.

The positive contact member 86 includes a lower positive contact member 86a facing the lower positive electrode 62a.
And an upper positive contact member 86b facing the upper positive electrode 62b. Each contact member 85 is shown in FIG.
As shown in the figure, the panda graph 80 has a bow shape and has a length dimension such that each panda graph 80 presses and abuts the opposing electrode 61 by the urging force of the urging means (not shown) facing each other. Is set. Further, each contact member 85 is attached to the inner wall surface of the drying furnace 2 so as to be adjustable in height by a structure (not shown), whereby the height of the counter electrode 61 is changed by changing the sectional height of the lumber R. It is possible to cope with fluctuations in position.

The contact rod 84 of the first cylinder switch 81 is connected to the pandagraph 80 of the upper positive contact member 86b, and the contact rod 84 of the second cylinder switch 82 is connected to the pandagraph of the lower positive contact member 86a. 80. The panda graphs 80 of the lower negative electrode 63, the upper negative electrode 64, and the common negative electrode 65 are each grounded. Therefore, the contact rod 8 of the first cylinder switch 81
When 4 is connected to the upper contact plate 83a of the U-shaped lead wire plate 83, the high frequency from the upper positive contact member 86b is applied to the lumber R interposed between the upper negative electrode 64 and the common negative electrode 65. When the contact rod 84 of the second cylinder switch 82 is connected to the lower contact plate 83b of the U-shaped lead wire plate 83, the lumber R interposed between the lower minus electrode 63 and the common minus electrode 65 is The high frequency from the lower positive contact member 86a is applied.

FIG. 5 is a partially cutaway perspective view showing one embodiment of a lead wire plate connection structure between the switching circuit section 8 outside the furnace and the counter electrode 61 inside the furnace. As shown in this figure,
Side wall 2 on the side of casing 70c for the switching circuit of drying oven 2
d, a rectangular wiring hole 28 is formed.
A connection plate X is inserted through 8 in an insulated state.

Specifically, at the inner peripheral edge of the wiring hole 28,
A rectangular frame member 29 made of a C-shaped steel is fitted into the frame member 29, whereby the periphery of the hole is reinforced and a waterproof process is performed. A plurality of bolts B are welded to the outer surface of the frame member 29 so as to protrude outward, and a synthetic resin insulating plate 84a having insertion holes corresponding to the bolts B is fitted. The wiring hole 28 is closed by the connection plate X by being fastened with a nut.

A rectangular mounting hole 84b is formed in the center of the insulating plate 84a, and the connecting plate X is inserted into the mounting hole 84b in a slidable state, so that the connecting plate X is insulated from the side wall 2d. In this state, it is passed through the wiring hole 28. Then, in a state where the connection plate X is inserted into the mounting hole 84b of the insulating plate 84a, the reinforcing plate 84c holding the connection plate X is bolted to the insulating plate 84a, thereby connecting the connecting plate X to the wiring hole 28. The insertion state is stabilized.

The distance between the connection plate X and the frame member 29 depends on the high-frequency output and the frequency, but is set to several tens mm to one hundred and several tens mm, for example, 100 mm or more. A short circuit toward the high-frequency frame member 29 is prevented.

A lead wire plate from the contact rod 84 of the switching circuit unit 8 is connected to the outer end of the connection plate X by welding or the like, and the inner end of the connection plate X is connected to the positive electrode 62 of the counter electrode 61. The lead wire plate is connected by a welding stopper or the like.

In the wood drying apparatus 1 as described above, first, the drying furnace 2 is constructed on a predetermined site, and at the same time, the high-frequency oscillator 6 is used.
0 is disposed at an appropriate position, and then the casing 70 (condenser casing 70a,
It is constructed by providing the inductance casing 70b and the switching circuit casing 70c) adjacently. When the drying furnace 2 is constructed, the connection plate X (FIG. 5) is previously prepared.
A wiring hole 28 is formed in the side wall 2d.
8 is formed in a portion provided with a switching circuit portion casing 70c.
Are placed adjacent to each other.

After the connecting plate X is inserted into the wiring hole 28 in an insulated state supported by the insulating plate 84a, the contact rod 84 of the switching circuit section 8 and the pandagraph in the drying chamber 20 are connected via the connecting plate X. By connecting to the drying circuit 80, the switching circuit unit casing 70c, that is, the switching circuit unit 8 is completed adjacent to the drying furnace 2.

Subsequently, the switching circuit casing 70
c, a capacitor casing 70a and an inductance casing 70b are arranged adjacent to each other.
A predetermined wiring is provided therebetween, and the coaxial cable 60a from the high-frequency oscillator 60 is connected to the center electrode plate 72 of the variable capacitor 71, whereby the construction of the wood drying apparatus 1 is completed.

As described above, in the present invention, the variable capacitor section 7a and the variable inductance section 7b of the high-frequency section 6 are used.
And the switching circuit unit 8 is connected to the casings 70a, 7
Since the casings 70a, 70b, and 70c are combined and disposed adjacent to the drying furnace 2, the high-frequency unit 6 is added to the drying furnace 2 without performing any complicated on-site work. It is possible,
This is convenient for designing and constructing the wood drying apparatus 1 of the composite drying method.

Since the lumber drying apparatus of the present invention is configured as described above, when drying the lumber R, a predetermined number of lumbers R are first sandwiched between the opposing electrodes 61, and the first laminated lumber and the first lumber R are dried. Two-ply wood is formed. For this purpose, the lower negative electrode 6 as a carriage drawn out of the drying furnace 2
Eight lumbers R are placed side by side in the width direction so as to face the longitudinal direction of the lower minus electrode 63, and a plurality of crosspieces R1 are laid across the respective lumbers R. Eight lumbers R are placed on the crosspiece R1 in the same manner as described above.

Then, a lower positive electrode 62a is put on the two rows of wood rows, and the lower positive electrode 62a
Two rows of wood rows are formed on a in the same manner as described above. And
By laminating the common minus electrode 65 on the top of this wood row, the first laminated wood is formed between the lower plus electrode 62a and the common minus electrode 65.

Subsequently, 2
After a row of wood is formed and the upper plus electrode 62b is stacked thereon, a two-row wood row is further formed on the upper plus electrode 62b. Finally, the second laminated wood is formed between the common minus electrode 65 and the upper minus electrode 64 by placing the upper minus electrode 64 on the top of the uppermost row of wood. A state in which a quantity of lumber R is mounted is obtained.

Next, the door 23 of the drying furnace 2 is opened, and the lower negative electrode 63 is pressed to load the lumber R to be dried into the drying space 20b. Then, the lower minus electrode 63, the lower plus electrode 62a, the common minus electrode 6
5, upper plus electrode 62b, and upper minus electrode 6
4 contact the respective pandagraphs 80 of the lower minus contact member 87, the lower plus contact member 86a, the common minus contact member 89, the upper plus contact member 86b, and the upper minus contact member 88, and are connected to each other.

When the loading of the first and second laminated wood pieces into the drying space 20b is completed, the door 23 is closed, and the power switch is turned on so that power can be supplied to the drying furnace 2. By operating a switch (not shown), the boiler 5 is operated, the fan 3 is driven to rotate at the same time, and after a lapse of a predetermined time, the high-frequency oscillator 60 is driven. 7
(Variable capacitor section 7a and variable inductance section 7
b) and the voltage is applied to the counter electrode 61 via the switching circuit section 8. The application of the high frequency to the lumber R is performed by a switching operation of the switching circuit unit 8 at preset time intervals,
Thus, the high frequency is alternately applied to the first laminated wood and the second laminated wood every predetermined time.

The steam generated by the operation of the boiler 5 is
The water is sent to a pressure pump 52 via a steam pipe 51, where the pressure is increased and the fuel is injected into the drying chamber 20 through a steam branch pipe 53. The steam supplied into the drying chamber 20 is circulated in the drying chamber 20 by the fan 3 (that is, an internal blower type (IF type) is used as an air circulation system), and the surface of each of the stacked sawmills R is circulated. , And the lumber R is externally heated. In the present embodiment, steam is introduced into the drying chamber 20 from the start to the end of the drying in a state where the difference between the dry bulb temperature and the wet bulb temperature in the drying chamber 20 is controlled to be 5 to 10 ° C. Supplied, so-called steam drying is employed.

When the drying is completed, the boiler 5 is stopped, the fan 3 is stopped, the door 23 is opened, and the lumber R which has become a dried material is taken out of the drying chamber 20.

The damper 5 provided in the exhaust pipe 54
5 is opened and closed as appropriate in accordance with the temperature and humidity in the drying chamber 20, and the opening is set so that the atmosphere in the drying chamber 20 is always optimal.

In the present invention, the high frequency generated by the high-frequency oscillator 60 is applied to each lumber R via the counter electrode 61 while the external heating is proceeding. A so-called composite drying process in which internal heating is added to external heating is performed. The high frequency from the high frequency oscillator 60 is tuned by the variable capacitor section 7a in accordance with the change in impedance due to the change in the dry state of the sawmill R over time, and then the inductance value is sequentially reduced by the variable inductance section 7b. After these so-called matching processes are performed, the switching circuit section 8 switches the application destination of the positive high frequency between the lower plus electrode 62a and the upper plus electrode 62b while alternately switching the counter electrode 61. , Whereby the first laminated wood and the second laminated wood are alternately internally heated.

In the present embodiment, the internal heating and drying by high frequency is adopted, so that the evaporation state of the water from the surface of the sawn timber R becomes uniform, and the moisture generated when the raw wood is heated and dried. The sawn timber R is dried in a state where bending and cracking due to unevenness do not occur.

FIG. 6 is a block diagram showing a control mechanism according to the present invention. In this embodiment, the temperature and the humidity in the drying chamber 20 are automatically controlled by the control device 9 attached to the drying furnace 2. A temperature sensor 91 and a humidity sensor 92 are provided in the drying chamber 20, and a load state detecting means 93 comprising a reflection type wattmeter is provided at an appropriate position of the high-frequency circuit. The temperature, the humidity, and the amount of reflected power in the inside are input to the control device 9.

Then, the control device 9 outputs various control signals to the fan 3, the boiler 5, the pressure pump 52, the exhaust fan 57, the actuator 56 and the matching circuit section 7 based on the stored control program. A composite drying process is performed on the lumber R by driving the base device.

The control device 9 has a built-in timer, and the basic drying operation (scheduled operation) of the wood drying device 1 is performed based on the timer.

In this embodiment, the drying chamber 20
The change in temperature over time is previously set and input to the control device 9, and a comparison operation between the set value and the detection value detected by the temperature sensor 91 is always performed. As a result of the comparison operation, when the temperature is lower than the set value, a signal for increasing the steam supply amount to the steam heater 4 is output from the control device 9, and when the temperature is higher than the set value, the steam supply amount is reduced. A signal to decrease the value is output.

In the present embodiment, the set humidity over time in the drying chamber 20 is input to the control device 9, and a comparison operation between the set value and the detection value detected by the humidity sensor 92 is performed. As a result of the comparison operation, when the humidity is lower than the set value, the controller 9 sends the boiler 5 and the pressure pump 52
When the humidity is higher than a set value, a signal for decreasing the power supply amount or cutting off the power supply is output. By performing such control, the difference between the so-called dry-bulb temperature and the wet-bulb temperature is set to 5 to 10 ° C.

In the present embodiment, the control device 9
The detection signal from the load state detection means 93 is input to the actuator 71d, and the actuator 71d is driven by feedback control based on the detection signal so as to always minimize the reflected power, and the capacitances of the first variable capacitor 71a and the second variable capacitor 71b are adjusted. As a result, the high-frequency output applied to the lumber R always follows the temporal change of the impedance of the lumber R so that the energy can be efficiently transmitted.

Further, in the present embodiment, the sliding contact bridging member 77 of the variable inductance 75 is lowered at a speed gradient previously determined experimentally, thereby decreasing the impedance as the lumber R dries. , So that the high-frequency energy is more efficiently supplied to the lumber R.

Therefore, the temperature and humidity in the drying chamber 20 in each of the above steps are always appropriately controlled to provide an optimal external heating environment, and the lumber R is internally heated by applying a high frequency. , The temperature distribution inside is always controlled uniformly, and the ideal drying process of the sawn wood R is realized.

In the present invention, the variable capacitor section 7a, the variable inductance section 7b, and the switching circuit section 8 are respectively provided in dedicated casings 70a, 70b, 70
c, so that the casings 70a, 70b, 70c can be disposed adjacent to the drying furnace 2, so that the fan 3, the steam heater 4, the boiler 5, and the accompanying components The installation of the high-frequency section 6 on the drying furnace 2 provided with the equipment in a complicated state becomes easy. Therefore, not only when newly constructing the wood drying apparatus 1 of the composite drying system, but also when additionally attaching the high frequency unit 6 to the existing wood drying apparatus of the external heating and drying system, the arrangement of the casings 70a, 70b, 70c. The wood drying apparatus 1 of the composite drying system can be obtained by only slightly devising the layout, which is effective in reducing the design cost and the construction cost.

Further, each casing 70a, 70b, 70
c, especially the switching circuit casing 70c is arranged adjacent to the long side surface of the drying furnace 2 where the door 23 is not provided, so that the lead wire from the switching circuit section 8 can be shortest and long. Counter electrode 6 in drying chamber 20 loaded with sawn wood R
1 can be guided to the central position, thereby making it possible to supply high-frequency energy to the counter electrode 61 with little loss, thereby contributing to a reduction in energy cost.

FIG. 7 shows a second example of the wood drying apparatus according to the present invention.
It is a partially notched perspective view which shows embodiment. In this embodiment, the drying furnace 2 is dimensioned to be long so that two sets of counter electrodes 61 are provided in series in the drying chamber 20. The length of the drying furnace 2 shown in FIG. 7 is substantially the same as that of FIG. 1 for convenience of illustration, but is actually approximately twice that of FIG. The other configuration of the counter electrode 61 and the configuration of the drying furnace 2 are the same as those of the first embodiment except that the pandagraph 80 and the members associated therewith are two sets.

The arrangement of the switching circuit 8 in the second embodiment is different from that in the first embodiment. That is, as in the first embodiment, the matching circuit section 7 employs one formed by one variable capacitor section 7a and one variable inductance section 7b, whereas the switching circuit section Reference numeral 8 denotes two sets of opposing electrodes 6
1, and a primary switching circuit section 8a is interposed between the output side of the variable inductance section 7b and each switching circuit section 8, and a high-frequency oscillator 60 is provided.
Is passed through the variable capacitor section 7a and the variable inductance section 7b and is distributed to the left and right switching circuit sections 8 by the primary switching circuit section 8a.
From the drying chamber 20 and to the counter electrode 61 on the entrance side.

According to the wood drying apparatus 1a of the second embodiment,
Since two sets of counter electrodes 61 are loaded in series in the drying chamber 20, the number of times of drying processing of the sawmill R is two.
Double the productivity. Further, since two switching circuit sections 8 are provided corresponding to each set of the counter electrodes 61, the lengths of the lead wires from each switching circuit section 8 to each panda graph 80 are set to be equidistant and short. It is possible to reduce the energy loss,
The amount of high frequency applied to the two sets of laminated wood can be equalized.

FIG. 8 shows a third example of the wood drying apparatus according to the present invention.
It is a perspective view showing an embodiment. In this embodiment, two drying ovens 2 are arranged in parallel and in parallel, and the length of the drying ovens 2 is set so that two sets of counter electrodes 61 are accommodated in each drying chamber 20 in series. . Further, the high-frequency oscillator 60 is disposed in a bridge state on the top plates of the pair of drying furnaces 2 arranged side by side. Then, the high-frequency oscillator 60
The primary switching circuit 8a is provided between the pair of drying furnaces 2 on the output side immediately after the primary switching circuit 8a.
On the output side of each of the drying ovens 2, a matching circuit unit 7 (variable capacitor unit 7a and variable inductance unit 7b) is provided on the upper part of the side wall of each drying furnace 2 facing each other.

On the output side of each matching circuit section 7 and at the lower position of each matching circuit section 7,
A switching circuit section 8 similar to that of the embodiment is provided adjacent to the drying furnace 2, and a high frequency is supplied from one switching circuit section 8 to the opposing electrode 61 of the adjacent one of the drying furnaces 2, and the other is connected to the other. High frequency is supplied from the switching circuit section 8 to the counter electrode 61 of the other drying furnace 2. In addition,
The configurations of the primary switching circuit section 8a and the switching circuit section 8 are the same as those described above.

According to the wood drying apparatus 1b of the third embodiment, since the high-frequency oscillator 60 is installed on the tops of the pair of drying furnaces 2, no space is required for installing the high-frequency oscillator 60, and This is convenient for effective use of Further, since the high frequency is supplied to the laminated wood in each drying furnace 2 via the separately provided matching circuit unit 7, it is possible to cope with the temporal change of the impedance according to the situation of each laminated wood. This makes it possible to match the high-frequency output, and realizes a uniform drying process in which the variation between the drying furnaces 2 in the drying process is suppressed.

[0096]

According to the first and seventh aspects of the present invention,
The switching circuit unit and the matching circuit unit are housed in casings to form a unit. By attaching the switching circuit unit casing to the outer surface of the drying oven, the matching circuit unit casing is disposed adjacent to the switching circuit unit casing. In addition, it is possible to make a drying furnace provided with equipment for external heating and drying capable of performing internal heating and drying by dielectric heating. In addition, the design and installation of these circuit parts in a drying furnace in which members for external heating are complicated can be easily performed.

In particular, since the casing of the switching circuit section is mounted on the long surface side except the door of the drying furnace, the mounting area is secured, and the laminated wood obtained by laminating long wood is used as the drying furnace. In the state of being loaded in, the electrical connection can be achieved in the shortest distance so that a high frequency can be applied to the central portion in the long direction of the opposing electrode portion sandwiching the laminated wood, and unnecessary inductance components and The effect of the capacitor component can be suppressed.

According to the second and eighth aspects of the present invention, the switching circuit is divided into a second switching circuit for the first laminated wood and a third switching circuit for the second laminated wood. Since the separate unitized casings are attached to the drying oven, in addition to the effects of the inventions according to the first and seventh aspects, even when a large amount of laminated wood is subjected to drying treatment by increasing the size of the drying oven. When the number of switching circuits is one, it is necessary to extend a lead wire for supplying high frequency to the counter electrode, but this disadvantage is eliminated, and the influence of unnecessary inductance components and capacitor components is suppressed.

According to the third aspect of the present invention, since the first and second matching circuit sections dedicated to each are employed, in addition to the functions of the first, seventh and second and eighth aspects, the second and the third matching circuit sections are provided. (3) The switching circuit is supplied with a high frequency to the first laminated wood and the second laminated wood via the separately provided matching circuit sections, and the impedance changes with time according to the situation of each laminated wood. Accordingly, it is possible to match the high-frequency output, and it is possible to realize a uniform drying process in which variations between layers in the drying process are suppressed.

According to the fourth aspect of the present invention, the drying furnace is
Since the bases were juxtaposed, the second switching circuit was attached to one drying furnace in which the first laminated wood was loaded, and the third switching circuit was attached to the other drying furnace in which the second dried wood was loaded.
High frequency can be supplied to two drying ovens by one high frequency oscillator, which can contribute to reduction of equipment cost.

According to the fifth aspect of the present invention, the variable capacitor section and the variable inductance section, which are constituent elements of the matching circuit section, are housed in casings to form a unit. Thus, the degree of freedom of the installation layout can be improved as compared with the case where the variable capacitor section and the variable inductance section are integrated.

According to the sixth aspect of the present invention, since the high-frequency oscillator is installed on the outer surface of the top plate of the drying furnace, the installation space for the high-frequency oscillator in the site can be saved, and the effective use of the site can be achieved. This is convenient for planning.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a wood drying apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a block diagram illustrating a control mechanism according to the present invention.

FIG. 6 is a partially cutaway perspective view showing another example of the wood drying apparatus according to the present invention.

FIG. 7 is a partially cutaway perspective view showing a second embodiment of a wood drying apparatus according to the present invention.

FIG. 8 is a perspective view showing a third embodiment of a wood drying apparatus according to the present invention.

[Explanation of symbols]

 1, 1a, 1b Wood drying device 2 Drying furnace 20 Drying chamber 3 Fan 31, 31 'Support frame 4 Steam heater 5 Boiler 6 High frequency unit 61 Counter electrode 62 Plus electrode 62a Lower plus electrode 62b Upper plus electrode 63 Lower minus electrode 64 Upper Negative electrode 65 Shared negative electrode 65 Shared negative electrode 7 Matching circuit section 7a Variable capacitor section 7b Variable inductance section 71 Variable capacitor 72 Central electrode plate 73 Right electrode plate 74 Left electrode plate 75 Variable inductance 76 Reverse U-shaped lead wire plate 77 Sliding contact Bridge member 78 Rack rod 8 Switching circuit unit 81 First cylinder switch 82 Second cylinder switch 83 U-shaped lead wire plate 84 Contact rod 85 Contact member 86 Positive contact member 87 Lower minus contact member 88 Upper minus contact member 9 shared negative contact member 9 controller 91 temperature sensor 92 humidity sensor 93 load state detection means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Yanagiya 6-3-12 Uesushio, Tennoji-ku, Osaka City Inside Yamamoto Binita Co., Ltd. (72) Inventor Mamoru Ueda 6-3-12, Uesushio, Tennoji-ku, Osaka Yamamoto Vinita F term in reference (reference) 3L113 AA01 AB01 AB06 AC03 AC05 AC11 AC43 AC67 BA05 DA01

Claims (9)

[Claims] 1. A wood drying apparatus comprising a drying furnace for drying laminated wood carried in from a door provided on at least one side surface of a rectangular parallelepiped container by controlling temperature and humidity. On the outer surface having a long surface except for the above-mentioned door, a first opposing surface for holding and holding the laminated wood by a high frequency which is dielectrically heatable from a high frequency oscillator and which is input through a matching circuit portion. A switching circuit unit for switching and supplying the electrode unit and the second counter electrode unit is housed and attached to the casing, and the matching circuit unit is housed in the casing and provided adjacent to the casing. And wood drying equipment. 2. A high-frequency oscillator, comprising: a wood drying apparatus provided with a drying furnace for controlling the temperature and humidity of laminated wood carried from a door provided on at least one side surface of a rectangular parallelepiped container and drying the wood. A first switching circuit for switching and supplying a high frequency that is dielectrically heatable from the apparatus and input through the matching circuit to the first laminated wood and the second laminated wood; and A second switching circuit connected to an output side of the first switching circuit and supplying a high frequency to the first counter electrode and the second counter electrode for sharing and holding the first laminated wood; A third switching circuit section connected to the output side of the switching circuit section for switching and supplying a high frequency to a third counter electrode section and a fourth counter electrode section for holding and holding the second laminated wood; The second and third switching circuits are The first switching circuit is housed in a casing and is attached to an outer surface having a long surface except for the door of the drying oven, and the first switching circuit is housed in the casing and is adjacent to the casings of the second and third switching circuits. A wood drying device, which is provided. 3. A wood drying apparatus provided with a drying furnace for controlling the temperature and humidity of laminated wood carried in from a door provided on at least one side of a rectangular parallelepiped container and drying the laminated wood. Switching circuit for switching and supplying the high frequency from the first laminated wood and the second laminated wood, and connected to the output side of the first switching circuit via a first matching circuit. A second switching circuit for supplying a high frequency to the first counter electrode and the second counter electrode for holding and holding the first laminated wood, and a second switching circuit for outputting the high frequency to the output side of the first switching circuit. A third high-frequency switching power supply is connected to the third counter electrode portion and the fourth counter electrode portion, which are connected via the matching circuit portion and share and hold the second laminated wood.
A switching circuit portion, wherein the second and third switching circuit portions are housed in a casing and are mounted adjacent to an outer side surface of the drying oven having a long surface excluding the door, and the first switching circuit portion is provided. Part and the first and second matching circuit parts are housed in a casing, respectively, so that the second and third matching circuit parts are
A wood drying device provided adjacent to a casing of a switching circuit. 4. The drying furnace is provided with two drying ovens in parallel,
The second switching circuit section is attached to one of the drying furnaces where the laminated wood is loaded, and the third switching circuit section is attached to the other drying furnace where the second dried wood is loaded. The wood drying apparatus according to claim 2 or 3, wherein the wood drying apparatus is used. 5. The matching circuit section includes a variable capacitor casing in which a variable capacitor section for changing the capacity is housed in a casing, and a variable inductance casing in which a variable inductance section for changing the inductance is housed in the casing. The wood drying apparatus according to any one of claims 1 to 4, wherein: 6. The wood drying apparatus according to claim 1, wherein the high-frequency oscillator is installed on an outer surface of a top plate of the drying furnace. 7. A drying furnace for drying the laminated lumber carried from a door provided on at least one side surface of at least one side surface of a rectangular parallelepiped container while controlling the temperature and humidity, having an elongated surface excluding the door. At least a hole for electric wiring is formed in the side surface, and a high frequency capable of dielectric heating is supplied through a matching circuit unit, and the first counter electrode unit and the second counter electrode unit sandwiching the laminated wood are provided. A switching circuit unit for switching and supplying the electric cable to the unit is housed in a casing to form a unit. The casing is attached to a side surface on which the hole is formed, and the electric cable from the switching circuit unit is connected to the casing via the hole. The matching circuit section is housed in a casing to form a unit, and the unit is provided adjacent to the casing of the switching circuit section. Law. 8. A drying furnace for drying the laminated wood carried from a door provided on at least one side surface of at least one side surface of a rectangular parallelepiped container while controlling the temperature and humidity, having an elongated surface excluding the door. A first laminated wood and a second laminated wood in which at least a hole for electric wiring is formed in a side surface, and a high frequency which can be dielectrically heated from a high frequency oscillator and is inputted through a matching circuit section is divided. A first switching circuit unit for switching and supplying the first switching circuit unit to a unit, the first switching circuit unit being connected to an output side of the first switching circuit unit, and a first opposing electrode unit for holding the first laminated wood in a shared manner; A second switching circuit for supplying high frequency to the second counter electrode and the second counter electrode via an electric cable is housed in a casing to form a unit; the second switching circuit is connected to an output side of the first switching circuit; A third switching circuit unit for supplying and switching a high frequency through an electric cable to a third counter electrode unit and a fourth counter electrode unit for holding and holding the material is housed in a casing to form a unit. The electric cables of the second and third switching circuits are guided into the furnace, and the casings of the second and third switching circuits are attached to the outer surface where the holes are formed, and the casings of the first switching circuit are connected to the second and third switching circuits. A method for manufacturing a wood drying apparatus, wherein the method is provided adjacent to a casing of a third switching circuit unit. 9. A drying furnace for drying the laminated lumber carried from a door provided on at least one side surface of a rectangular parallelepiped shape by controlling the temperature and humidity of the container, the drying furnace having a long surface except for the door. A first switching circuit unit for providing at least a hole for electric wiring on a side surface and switching and supplying a high frequency that can be dielectrically heated from a high frequency oscillator to a divided first laminated wood and a second laminated wood; Are housed in a casing to form a unit, and are connected to the output side of the first switching circuit unit, and are provided with a first matching circuit unit and a first opposing electrode unit and a second opposing electrode unit which share and hold the first laminated wood. A second switching circuit for supplying and switching a high frequency via an electric cable via the electric cable is housed in a casing to be unitized, connected to the output side of the first switching circuit, and holding and holding the second laminated wood. Third A third switching circuit for supplying and switching a high frequency to the opposing electrode and the fourth opposing electrode via a second matching circuit via an electric cable is housed in a casing to form a unit, and the third switching circuit is inserted through the hole to form the unit. The electric cables of the second and third switching circuits are led into the furnace to
And a casing of the first and second matching circuit sections unitized by attaching a casing of the third switching circuit section to the outer surface on which the hole is formed, and housing the casing of the first switching circuit section and the casing respectively. Is provided next to the casings of the second and third switching circuit sections.