JP2001252909A - Method and device for manufacturing compressed lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a compressed lumber while reducing the working cost. SOLUTION: This manufacturing device for a compressed lumber is equipped with a heat-treatment device and a fixing device. The heat-treatment device heat-treats by applying a high frequency to a raw material lumber while applying a compression treatment. The fixing device fixes the compressed state of the compressed lumber obtained by the heat-treatment device. The heat- treatment device is constituted in such a manner that the high frequency is applied to the raw material lumber while the raw material lumber which is pinched between a pair of holding plates is compressed between a pair of roller conveyors. The fixing device is constituted in such a manner that the lumber between the pair of holding plates is cooled while the compressed state between the pair of roller conveyors is kept. The raw material lumber is compressed by respective roller conveyors under a state being pinched between the pair of holding plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for compressing raw wood, performing a heat treatment, and further performing a cooling process.
The present invention relates to a method and an apparatus for manufacturing compressed wood in which a compressed state of wood is fixed.

[0002]

2. Description of the Related Art Conventionally, there is known an apparatus for producing compressed wood as shown in a conceptual view in FIG. The compressed wood manufacturing apparatus 100 includes a pair of upper and lower opposing electrodes 101 (an upper electrode 102 and a lower electrode 10) that sandwich the raw wood W.
3), a compression device (for example, a hydraulic cylinder device 104) for compressing the raw wood W via the upper electrode 102, and a high frequency oscillator 105 for applying a high frequency to the raw wood W via the counter electrode 101. It has a configuration.

[0003] With the raw wood W sandwiched between the upper electrode 102 and the lower electrode 103, the cylinder device 10
4 lowers the upper electrode 102 to compress the raw wood W to a thickness of less than half, and
By applying a high frequency from No. 5 to the raw wood W via the counter electrode 101, the raw wood W is internally heated, and the wood structure is changed by this heat treatment to obtain the compressed wood W1.

[0004]

In the conventional compressed wood manufacturing apparatus 100 as described above, even if the compressed wood W1 is formed between the counter electrodes 101, the compressed state by the cylinder device 104 is released. Then, there is an inconvenience that the original thickness dimension is restored by the restoring force inherently provided by the wood structure. In order to avoid such inconvenience, the compressed wood W1 taken out from the counter electrode 101
Is a pair of holding plates B as shown in FIG.
Through, for example, a U-shaped fastening fitting 106,
In this state, a fixation process is performed such that water vapor is applied while being left for a long time or loaded in a predetermined container.

However, the fastener 106 is attached to the compressed wood W1 once taken out of the counter electrode 101 by the holding plate B.
However, there is a problem in that the work of mounting through the interface is very troublesome and the workability is inferior.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made to reduce the operating cost and to produce compressed wood efficiently. It is intended to provide a method and apparatus.

[0007]

According to the first aspect of the present invention,
A compression step of compressing the raw wood, a heat treatment step of heat-treating the compressed wood obtained in the compression step, and a cooling step of cooling the heat-treated compressed wood obtained in the heat treatment step; Moving the wood from the above-described one process to another process while maintaining the compressed state of the wood by passing the wood between roller pairs consisting of a pair of rollers separated by a predetermined size while being sandwiched between a pair of holding plates. It is characterized by the following.

According to a second aspect of the present invention, there is provided a compression apparatus for compressing raw wood, a heat treatment apparatus for heat-treating the compressed wood obtained by the compression apparatus, and a heat-treated compressed wood obtained by the heat treatment apparatus. And a cooling device for cooling the
The raw wood is passed through a roller conveyor composed of a pair of rollers separated by a predetermined size while being sandwiched between a pair of holding plates, so that the compressed state of the wood is maintained from the one device to the other device while maintaining the compressed state of the wood. It is characterized in that it is configured to move.

According to the first and second aspects of the present invention, the raw wood is compressed via the roller conveyor by the compression device (compression step) while being sandwiched between the pair of holding plates. Non-uniformity of the pressing force on the raw wood becomes uniform through the holding plate. Subsequently, the raw wood is heat-treated in a heat-treating apparatus (heat-treatment step) in a state where it has been subjected to uniform compression treatment, and is appropriately compressed into wood by softening the wood structure. The compressed wood is cooled by the next cooling device (cooling step) while being held between the holding plates in a pressed state via the roller conveyor, whereby the compressed state is reliably fixed.

[0010] Since the compressed wood is sandwiched between the roller conveyors via the holding plate, the transfer from one apparatus to another can be easily performed by the rotation of the rollers of the roller conveyor.

As described above, since the roller conveyor and the holding plate are employed as the member for compressing and transferring the raw wood, the compressed state of the raw wood can be properly maintained, and the wood can be transferred from one device to another. Transfer to the apparatus becomes easy. Therefore, it is necessary to take out the compressed wood which has been subjected to the compression treatment and the dielectric heating between the pair of hold plates, temporarily remove the compressed wood from between the hold plates, and then sandwich the same between the hold plates and fasten with the fastener. This eliminates the need to perform this operation, thereby improving workability and reducing the cost of manufacturing compressed wood.

In the second aspect of the invention, the compression device and the heat treatment device may be separate devices, or the compression device and the heat treatment device may be shared. In the case of another apparatus, the raw wood is subjected to a compression treatment by a compression apparatus, and then the obtained compressed wood is transferred to a heat treatment apparatus, where the compressed wood is subjected to a heat treatment independently of the compression apparatus. You. On the other hand, when the compression apparatus and the heat treatment are shared by the same apparatus, the shared apparatus is configured so that the compression processing and the heat treatment can be performed simultaneously or with a predetermined time difference. When such a common device is used, the heat treatment can be performed while performing the compression treatment on the raw wood, and the degree of freedom of the compression treatment and the heat treatment can be improved accordingly.

According to the second aspect of the present invention, the heat treatment device and the cooling device may be different devices.
The heat treatment device and the cooling device may be shared. In the case of using a different apparatus, the wood is subjected to heat treatment by a heat treatment apparatus, and the obtained heat-treated compressed wood is transferred to a cooling apparatus, where the compressed wood is cooled independently of the heat treatment apparatus. Will be applied. On the other hand, when the heat treatment and the cooling process are shared by the same device, a time difference is provided in the shared device, the heat treatment is performed first, and after the heat treatment is completed, the cooling process is performed in the same device. become. When such a shared device is used, it is possible to reduce the equipment cost because the shared device can be shared.

Further, in the heat treatment in the heat treatment apparatus according to the second aspect of the present invention, the heat transfer is performed by sandwiching wood through a holding plate between heating plates configured to supply heating steam or electric heating. Heating method, in-furnace heating method in which wood sandwiched between the hold plates is loaded into a heating furnace heated to a predetermined temperature by heating steam supply or electric heating, and furthermore, the hold plate is attached to the wood. Various heating methods such as a dielectric heating method in which a heat treatment is performed by applying a high frequency through the heater can be adopted.

According to a third aspect of the present invention, in the second aspect, the heat treatment apparatus is configured to heat-treat the raw wood by applying a high frequency.

According to the present invention, the raw wood is rapidly heat-treated by dielectric heating by applying a high frequency.

The invention described in claim 4 is the second or third invention.
In the apparatus for producing compressed wood according to the above, provided on the upstream side of the heat treatment apparatus, and a wood loading apparatus that sandwiches the raw wood between two hold plates, and disposed downstream of the cooling apparatus, and A wood take-out device for taking out the compressed wood cooled by the cooling device from between the two holding boards, and the two holding boards emptied by taking out the compressed wood with the wood taking-out device, to the wood loading device. And a holding plate returning means.

According to the present invention, while the holding plate is circulated with the wood loading device, the compression device, the heat treatment device, the cooling device, the wood removal device and the wood loading device, the raw wood is placed between the pair of holding plates in the wood loading device. Due to the loading, the raw wood is subjected to a compression treatment in a compression device along with the movement of the hold plate along the annular transport path, is subjected to heat treatment by dielectric heating in a heat treatment device, becomes compressed wood, and is cooled in a cooling device. By performing the cooling process, the fixation of the wood is stabilized, and the hold plate that has been emptied by removing the compressed wood from between the hold plates by the wood removal device is returned to the wood loading device again. Therefore, the raw wood sequentially supplied to the wood loading device by such a circulating movement of the hold plate is sequentially discharged from the wood removal device,
The compressed wood is produced continuously.

According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the holding plate is formed of a conductive material, and a high frequency is applied to the raw wood through the holding plate. It is characterized by being constituted so that it may be performed.

According to the present invention, since the hold plate is formed of a conductive material, it is possible to apply a high frequency to the raw wood through the hold plate, and it is not necessary to separately provide a high-frequency electrode, and the equipment cost is accordingly reduced. Contributes to the reduction of

[0021]

FIG. 1 is a process diagram showing an embodiment of a method for producing compressed wood according to the present invention. As shown in this figure, in the manufacturing method of the present invention, a wood loading step P1 in which the raw wood W is sandwiched between a pair of upper and lower hold plates B, and the raw wood W between the hold plates B is compressed via an opposed hold plate. A heat treatment step P2 of applying a high frequency to the heat treatment by dielectric heating, a fixing step P3 of fixing the compressed state of the wood after the heat treatment, and a fixed compressed wood W1
And a holding plate returning step P5 of returning the taken out holding plate B to a predetermined position where the raw material loading step is performed.

In this embodiment, the combination of the compression step and the heat treatment step of the present invention is called a heat treatment step, and the cooling step of the present invention is called a fixing step.

The above steps are sequentially executed along a circulating transport path for transporting the hold plate B holding the raw wood W or the compressed wood W1. In the circulating plate runway, a roller conveyor described later is employed between the wood loading step P1 and the takeout step P4, and a chain conveyor and a lift conveyor described later are adopted between the takeout step P4 and the wood loading step P1. I have.

Therefore, in the wood loading process P1, the holding plate B
The raw material wood W sandwiched between is loaded by a roller conveyor into a wood loading process P1, a heat treatment process P2, and a fixing process P3.
The compressed wood W1 is obtained by performing the above-described predetermined processing in each step while being sequentially conveyed, and the compressed wood W1 is taken out from between the holding plates B in the taking out step P4.
The lower one of the hold plates B is returned to the wood loading step P1 by a chain conveyor, and the upper one is returned to a wood loading step P1 by a lift conveyor.

The holding plate B returned to the wood loading step P1
The raw wood W which is newly supplied compressed wood W1 is sandwiched and held while being conveyed by the circulation conveyance path.
Is subjected to the same processing as described above. Therefore, the wood loading process P
1, the raw wood W is supplied at a predetermined time pitch, and the compressed wood W1 is discharged at the same time pitch from the unloading step P4.

As the raw wood W, a so-called laminated wood, in which veneers having a predetermined thickness are laminated with a predetermined adhesive, is used. By employing such glued lumber, it becomes possible to effectively use thinned wood and unnecessary wood. In the present invention, the raw wood W is not limited to the laminated wood, and may be a solid wood.

In the present invention, the heat treatment step P
In step 2, a high frequency from a high-frequency oscillator is applied to the compressed raw wood W via the holding plate B, and the raw wood W is subjected to heat treatment by dielectric heating.
In a state in which P is held between a pair of holding plates B
3, so that the compressed state in one or both of the heat treatment step P2 and the fixing step P3 can be maintained even during the transportation, whereby the compression processing is performed once in the heat treatment step P2. The compressed wood W1 is not restored to its original thickness.

In the present embodiment, the pre-heat treatment is performed on the raw wood W during the handling in the wood loading step P1. This pre-heat treatment is performed by first bringing the holding plate B up to a predetermined temperature by bringing the hot plate into contact with the holding plate B in the middle of handling, and holding the raw wood W with the heated holding plate B. Will be
Preheating temperature of raw wood W (however, the preheating temperature is
Is a surface temperature of 150 ° C to 200 ° C.

Such a pre-heat treatment is performed in the wood loading step P1 because the heat treatment in the heat treatment step P2 is internal heating by high frequency, so that the central portion of the raw wood W quickly reaches a high temperature. On the other hand, the temperature of the surface of the raw wood W is hard to be raised, so that the temperature distribution inside the raw wood W becomes non-uniform within a limited time only by dielectric heating, but this is to avoid such an inconvenience.

In the present invention, dielectric heating is the main feature, and the pre-heat treatment can assist the dielectric heating. This is because a predetermined time (for example, 6 minutes) is required to raise the temperature of the raw wood W to 200 ° C. by the dielectric heating. During this time, in the wood loading step P1, which is the previous step, the raw wood W If the raw wood W is heated by external heating using this waiting time, it is possible to shorten the time of dielectric heating by applying high frequency in the heat treatment process P2. It is because it becomes.

When the preheating temperature is set at 150 ° C. to 200 ° C., if the preheating temperature is lower than 150 ° C., the internal heating temperature of the raw wood W by applying high frequency in the next heat treatment step P2;
This is because the difference from the surface temperature of the raw wood W, which is mainly increased by preheating, is too large, and it is difficult to achieve uniform heating. This is because not only does the temperature rise higher than the internal temperature, but also the temperature does not need to be 200 ° C. or higher in order to soften the wood structure.

In the heat treatment step P2, the raw wood W sandwiched by the holding plate B is introduced between the multiple roller conveyors while maintaining the sandwiched state, and subjected to a compression treatment via the multiple roller conveyor and the counter electrode. A high frequency (13.56 MHz) from a high frequency oscillator is applied while the heat is applied, and a heat treatment is performed in a compressed state for a predetermined time (about 6 minutes in the present embodiment).

In the present embodiment, the compressive force for the raw wood is set to 100 to 200 kg / cm ² . The compression force in this range is adopted because the compression force is 100 kg.
If it is less than / cm ² , the raw wood W will not be sufficiently compressed due to unexpected compression force, and if it exceeds 200 kg / cm ² , complete destruction of the wood structure will occur, making it impossible to obtain effective compressed wood W1. That's why.

Then, the output of the high-frequency oscillator in the heat treatment step P2 is set so that the heat treatment temperature of the raw wood W by dielectric heating becomes 180 ° C. to 200 ° C. Such a temperature range is set for the following reason.

That is, wood is mainly composed of cellulose, hemicellulose and lignin, and these substances are melted in a temperature range of 180 ° C. to 450 ° C. and are finally a kind of anhydrosugar. It is reformed to repoglucosan (C ₆ H ₁₀ O ₅ ).
This melting is more active at higher temperatures. However, since the object of the present invention cannot be achieved if all the raw wood W is reformed to repoglucosan, and if the raw wood W is heated to a high temperature in an oxidizing environment in the air, the wood texture may be reduced. Since the combustion reaction occurs until the reforming of the raw wood is performed, and the object of the present invention cannot be achieved, the heat treatment temperature of the raw wood W by dielectric heating is set to 180 ° C to 200 ° C.

Regarding the order of the compression treatment and the heat treatment in the heat treatment step P2, the raw wood W may be first subjected to a compression treatment and then subjected to dielectric heating, or the dielectric heating may be performed first to reduce the raw wood W. The compression processing may be performed after the temperature is raised to a predetermined temperature. Further, the compression process and the heat treatment for the raw wood W may be started at the same time. Incidentally, in the present embodiment, both processes are started at the same time.

Then, by the above-mentioned compression treatment and heat treatment by dielectric heating in the heat treatment step P2, the raw wood W
Becomes compressed wood W1 having a thickness of 1/3 to 1/2.

The fixing step P3 is a step in which the compressed wood W1 that has been heat-treated while being compressed in the heat-treating step P2 is maintained in a compressed state (ie, is fixed). In the present embodiment, cooling water is sprayed. Fixing step P31 of cooling compressed wood W1 by pressing, and this first fixing step P3
And a second fixing step P32 for blowing compressed air onto the raw wood W cooled in step 1 to further cool the compressed wood W1 and blowing off water drops adhering to the surface of the compressed wood W1. I have. By such a two-stage cooling process, the compressed wood W1 becomes 180 ° C. to 200 ° C.
To 100 ° C or less in a short time (approximately 6 minutes)
Thereby, the compressed state of the compressed wood W1 is fixed.

By the way, it is known that once compressed, the compressed state of wood is relatively stable in a dry environment, but is restored to a substantially pre-deformed shape under the influence of moisture and heat. I have. This is because in the dry state, the compressed state is maintained by the myriad newly formed hydrogen bonds in the wood component, but when water is added to it, the hydrogen bonds formed in the wood component are broken, and further heating is performed. It is believed that when added, the molecular motion becomes active, which restores the elastic recovery and restores the compressed wood.

Therefore, various studies have been made on maintaining (fixing) the compressed state of wood, and fixing by resin impregnation treatment or fixing by heat treatment or steam treatment has been put to practical use. The immobilization by resin impregnation is to impregnate the compressed wood with a low molecular weight phenol or melamine resin, and the immobilization of the compressed wood is realized by curing the resin in the wood tissue. The heat treatment is performed at 180 ° C to 200 ° C.
For 5 to 20 hours, whereby the compressed wood is permanently fixed. In addition, steam treatment
Wood is compressed while supplying high-pressure steam at 180 ° C to 200 ° C in a pressure vessel. All of these methods have disadvantages in that a large-scale device is required, the operation is very troublesome, or a long time is required for complete immobilization.

The inventors of the present invention have conducted intensive studies and found that, after heat-pressing the raw wood W in the heat treatment step P2, the compressed wood W1 was cooled rapidly while maintaining the pressed state. As a result of the finding that the immobilization of the compressed wood W1 is realized, the present invention has been achieved, and the immobilization step P3 for immobilization by cooling is performed immediately after the heat treatment step P2, thereby shortening the time ( The immobilization of the compressed wood W1 is realized in about 12 minutes).

Then, the fixing step P3 (first and second steps)
In the fixing steps P31, 32), the compressed wood W1 pinched by the hold plate B is pressed and pinched by a predetermined pressing mechanism via a plurality of roller conveyors, and the first fixing step P31 is performed.
The first stage rapid cooling is performed by spraying the cooling water at 31 and is cooled to 100 ° C. or less in approximately 6 minutes.
In the fixing step P32, cool air is supplied and further cooled in about 6 minutes, whereby the fixing processing of the compressed wood W1 is completed.

The compressed wood W1 that has been subjected to the immobilization process in the immobilization process P3 is sent to the take-out process P4 along the circulating transport path, where the compressed wood W1 is removed from the holding plate B and is out of the system as a product. While being carried out, the hold plate B is returned to the wood loading process P1 in the next hold plate return process P5. During the handling of the holding plate B in the holding plate returning process P5, a heating process is performed on the pair of holding plates B via the electric heating plate to prepare for the preliminary heating of the raw wood W in the wood loading process P1. .

FIG. 2 is a perspective view showing one embodiment of a manufacturing apparatus applied to the above-mentioned method for manufacturing compressed wood, and FIG.
Is a plan view of the same. As shown in these drawings, the compressed wood manufacturing apparatus 1 receives the raw wood W and pays out the compressed wood W1 corresponding to the wood loading step P1, the unloading step P4, and the hold board return step P5, and also holds the hold wood. A receiving and dispensing device 2 for returning B to the wood loading process P1, a heat treatment device (heat treatment unit) 3 installed adjacent to the receiving and dispensing device 2, and a fixing device (fixed) disposed adjacent to the heat treatment device 3 Processing section) 4;
A circulating transport means 5 for transporting the raw wood W on a circulating transport path provided through these devices 2, 3, 4; a high-frequency oscillator 6 for supplying high frequency to the heat treatment device 3; And a hydraulic unit 7 for feeding.

In the present embodiment, the heat treatment apparatus 3 is a combination of the compression apparatus of the present invention and the heat treatment apparatus of the present invention. Further, the fixing device 4 of the present embodiment corresponds to the cooling device of the present invention.

The receiving and dispensing device 2 includes a raw wood W
Raw material loading section 2a for receiving the compressed wood and holding it between a pair of hold plates B, compressed wood removal section 2b for taking out compressed wood W1 as a product from the pair of hold plates B, and loading the empty pair of hold plates B with the raw material. And a hold plate return portion 2c for returning to the portion 2a.

The compressed wood manufacturing apparatus 1 of the present invention
The pair of hold plates B holding the wood are driven by the circulating conveyance means 5 along the circulating conveyance path, and the raw material loading portion 2a of the receiving and dispensing device 2, the heat treatment device 3, the fixing device 4, and the compressed wood unloading of the receiving and dispensing device 2. By circulating and moving between the section 2b and the holding plate returning section 2c, the raw wood W sequentially loaded in the raw material loading section 2a is continuously taken out of the system as compressed wood W1 by the compressed wood take-out section 2b. . The hold plate B from which the compressed wood W1 has been taken out by the compressed wood take-out portion 2b is returned to the raw material loading portion 2a via the hold plate return portion 2c, where it is circulated again across the raw wood W.

The details of each device will be described below with reference to FIGS.
This will be described based on FIG. First, FIG. 4 to FIG. 6 are diagrams showing an embodiment of the receiving and dispensing apparatus 2, FIG. 4 is a partially cutaway perspective view, FIG. FIG. 5 is a view on line B in FIG. 4. In FIG. 4, the XX direction is called a width direction, and the YY direction is called a front-back direction. And especially-
The X direction is called left, the + X direction is called right, the -Y direction is called back, and the + Y direction is called front.

As shown in these figures, the receiving and dispensing apparatus 2 is configured by arranging a raw material loading section 2a, a compressed wood extracting section 2b and a holding plate returning section 2c in a substantially rectangular parallelepiped frame 20. I have. The frame body 20 includes a base frame 20a assembled in a rectangular shape in a plan view, and four pillars 20 erected at corners of the base frame 20a.
b, a beam frame 20c bridged between the tops of the columns 20b and formed in a rectangular shape in plan view, and two erection frames 20d laid in parallel between a pair of beam frames 20c facing each other. Consists of

A first support plate 20e, a second support plate 20f, and a third support plate 2f are arranged between right and left base frames 20a orthogonal to the installation frame 20d in this order from the right.
0 g is installed. Then, the first support plate 20e
The upper part is equipped with equipment relating to the raw material loading section 2a,
On the support plate 20f, equipment related to the hold plate return part 2c is mounted, and on the third support plate 20g, equipment related to the compressed wood take-out part 2b is mounted.

The receiving and dispensing device 2 is formed by being supported by such a frame 20 and receives the hot plate 21 on the receiving side.
, A receiving roller conveyor 22, a discharging roller conveyor 23, a pair of upper and lower relay hot plates (a lower relay hot plate 24 and an upper relay hot plate 25), a chain conveyor 26, a discharging lift conveyor 27, and a receiving lift. And a conveyor 28.

The receiving-side hot plate 21 is one element constituting a raw material loading section 2a for receiving and preheating the raw wood W in the receiving and dispensing device 2, and is one side portion within the frame 20, It is installed between the base frames 20a so as to extend in a direction orthogonal to the installation frame 20d.

The receiving roller conveyor 22 is also an element constituting the raw material loading section 2a.
The raw wood W sandwiched between the upper holding plates B is sent out to the heat treatment apparatus 3.

The delivery roller conveyor 23 is one of the components of the compressed wood removal unit 2b, and is a compressed wood W1 sandwiched between a pair of holding plates B sent from the fixing device 4 to the receiving and delivery device 2. Is set at a fixed position, a plurality of rollers are arranged in parallel, and arranged on the other side of the frame 20 in parallel with the receiving-side hot plate 21.

The lower relay hot plate 24 receives the lower hold plate B on the discharge roller conveyor 23 after the compressed wood W1 has been carried out, and preheats by heat transfer heating.
The upper relay hot plate 25 receives the upper hold plate B and preheats it by heat transfer heating.

The chain conveyor 26 once conveys the lower holding plate B on the delivery roller conveyor 23 to the lower relay hot plate 24, where the holding plate B is preheated by heat transfer for a predetermined time and then further. It is transported to the receiving-side hot plate 21.

The pay-out side lift conveyor 27 grips the upper holding plate B placed on the raw wood W on the pay-out roller conveyor 23 and transports it to the upper relay hot plate 25. Side lift conveyor 28
Transports the hold plate B preheated on the upper relay hot plate 25 toward the raw wood W on the receiving hot plate 21.

As shown in FIG. 5, the receiving-side heating plate 21 is formed of a hollow metal plate, and an electric heater 21a is provided inside the hollow portion. Receiving hot plate 2 due to heat generation
1 is to be heated. In the present embodiment, the receiving-side hot plate 21 is divided into six in the longitudinal direction, and the chain conveyors 26 are respectively provided in gaps between the receiving-side hot plate 21 at both ends and the next receiving-side hot plate 21. The receiving roller conveyor 22 is mounted at the gap between the other receiving-side hot plates 21 and at the outer positions of the receiving-side hot plates 21 at both ends. The receiving roller conveyor 22 and the chain conveyor 26 are set so that the tops are at the same level.

Each of the receiving-side hot plates 21 is orthogonal to the mounting frame 20d, and is provided between the base frames 20a facing each other.
e, between the lower position slightly lower than the receiving roller conveyor 22 and the upper position slightly higher than the receiving roller conveyor 22 by the synchronous driving of the first cylinder devices 21b. It goes up and down all at once.

Accordingly, when the receiving side hot plate 21 is located at the upper position by driving the first cylinder device 21b, the holding plate B at the receiving position is brought into a close contact state supported only by the receiving side hot plate 21. While the heat transfer heating from the receiving-side hot plate 21 is favorably performed, while the receiving-side hot plate 21 is set at the lower position by the reverse drive of the first cylinder device 21b, the holding plate B is used as the receiving roller conveyor 22. , And is conveyed toward the heat treatment apparatus 3 by driving the receiving roller conveyor 22.

Each of the receiving roller conveyors 22 is provided with five rollers R disposed in a gap between both ends of the receiving hot plate 21 and the central receiving hot plate 21. Each roller R is rotatably supported around a support shaft of a pair of brackets 22a erected from both sides in the width direction of the first support plate 20e. An endless belt 22c is stretched between each of the rollers R and a first drive motor 22b provided at an appropriate position in the lower portion of the frame 20, and the drive rotation of the first drive motor 22b is performed via the endless belt 22c. The information is transmitted to the roller R. Therefore, the raw wood W sandwiched between the holding plates B on the receiving roller conveyor 22 is conveyed toward the heat treatment apparatus 3 by the rotation of each receiving roller conveyor 22 driven by the first drive motor 22b.

The dispensing roller conveyor 23 has a roller supporting plate 23a erected from both sides in the width direction of the third supporting plate 20g, and a rotatable shaft about a roller shaft provided between the roller supporting plates 23a. A predetermined number of rollers R are supported, and a second drive motor 23b for rotating each roller R synchronously around the roller axis is provided. The compressed wood W1 between the pair of holding plates B conveyed from the fixing device 4 by the simultaneous rotation of the rollers R driven by the second drive motor 23b is supplied to the delivery roller conveyor 23.
It is fed to the upper fixed position, and is set at the fixed position when the driving of the second drive motor 23b is stopped.

The lower relay hot plate 24 is connected to the second support plate 20.
It is divided into three on f. Each lower relay heating plate 24 is adapted to be moved up and down by driving a cylinder device (second cylinder device 24b), similarly to the receiving-side heating plate 21, and has a built-in electric heater 24c. 24c is always heated to a predetermined temperature (approximately 200 ° C.). Accordingly, the lower holding plate B transferred from the discharge roller conveyor 23 to the lower relay heating plate 24 by the driving of the chain conveyor 26 transfers heat from the lower relay heating plate 24 slightly raised by the driving of the second cylinder device 24b. Will be preheated.

The upper relay heating plate 25 is disposed so as to extend in the front-rear direction in a suspended state at a substantially central position in the frame 20. Specifically, an intermediate beam frame 20h is erected at a substantially middle position in the vertical direction between each pair of columns 20b facing each other in the width direction.
A hot plate supporting member 25a is installed between the intermediate positions of h, and the upper relay hot plate 25 is supported by the plate supporting member 25a.

The upper heating plate 25 has the electric heater 2
5b, the upper holding plate B placed on the upper relay heating plate 25 is preheated by the heat generated by energizing the electric heater 25b.

The chain conveyor 26 includes a pair of endless chains 26a extending in the front-rear direction and extending over substantially the entire length in the width direction of the frame body 20 at the lower portion.
a and the frame 2
The rotation shaft 26c is provided concentrically with the sprocket 26b in the front-rear direction within 0 and a third drive motor 26d for rotating the rotation shaft 26c via a predetermined power transmission means.

The endless chain 26a, sprocket 2
The chain conveyor 26 including the rotary shaft 26b, the rotation shaft 26c, and the third drive motor 26d is mounted on a device mounting table 26f disposed at the bottom in the frame 20. The device mounting table 26f is supported at four corners by a lifting cylinder device 26e mounted on the floor, and is moved up and down between a lower position and an upper position by forward and reverse driving of the lifting cylinder device 26e. .

Each of the endless chains 26a fits into a gap between the receiving-side hot plates 21, between the lower relay hot plates 24, and between the rollers R of the discharging roller conveyor 23, and has an upper surface set in a lower position. The roller conveyor 22 and the discharge roller conveyor 2 are located below the upper surfaces of the rollers R of the receiving roller conveyor 22 and the discharge roller conveyor 23 while being set at the upper positions.
The third roller R is positioned slightly higher than each upper surface.

The hold plate B is conveyed to a fixed position on the pay-out roller conveyor 23 by driving the pay-out roller conveyor 23 in a state where the chain conveyor 26 is set at the lower position. By driving the chain conveyor 26 in a state where the roller conveyor 22 is stopped and the endless chain 26a is set at the upper position, the holding plate B receives heat from the receiving roller conveyor 23 from above the discharging roller conveyor 23 by the rotation of the endless chain 26a. The paper is conveyed toward the plate 21.

Accordingly, the hold plate B is conveyed to the lower relay hot plate 24 by the drive of the chain conveyor 26, the driving thereof is stopped, and then the lower relay hot plate 24 is raised. 26a and is supported by the lower relay heating plate 24 to be heated and transferred. Similarly, the hold plate B is transported from the lower relay hot plate 24 to the receiving hot plate 21 by the drive of the chain conveyor 26, and the same pre-heat treatment is performed here.

When the lower relay heating plate 24 is lowered, the holding plate B is supported by the rollers R of the receiving roller conveyor 22, and the heat treatment device 3 is driven by driving the receiving roller conveyor 22 in this state. Will be conveyed toward.

The payout lift conveyor 27 is guided by a pair of erection frames 20d and suspended so as to be movable in the width direction, and stands at a central portion of the payout hanging plate 27a. Discharge side cylinder device 2 installed
7b, a payout-side suspended heat plate 27c that moves up and down by forward and reverse drive of the payout-side cylinder device 27b, and an upper hold plate B provided on both front and rear sides of the payout-side suspended heat plate 27c. The holding frame 29 (the payout side holding structure 29a) for holding and the payout side suspension plate 27a
Fourth drive motor 27 that moves forward and reverse in the width direction along d
d.

The dispensing-side cylinder device 27b includes a cylinder 271b and a piston rod 272b projecting downward from the lower end of the cylinder 271b through the dispensing-side hanging plate 27a. The lower end portion of the piston rod 272b is fixed to the pay-out side heat-holding plate 27c, and the pay-out side heat-holding plate 27c is received by the hydraulic pressure supplied from the hydraulic unit 7 so that the piston rod 272b moves up and down with respect to the cylinder 271b. It goes up and down.

The dispensing-side heat-holding plate 27c has an electric heater 27e therein, and generates heat by energizing the electric heater 27e, and is held by the dispensing-side holding structure 29a via the dispensing-side heat-holding plate 27c. The heated holding plate B is preheated. Such a payout-side hanging heat plate 27c
, A pair of guided rods 27f in the front-rear direction is provided upright at a position separated from the center position by a predetermined distance in the front-rear direction. These guided rods 27f are slidably penetrated into guide holes formed in the payout side suspension plate 27a, respectively, so that the payout side suspension heat plate 27c moves up and down smoothly while maintaining the horizontal posture. It is possible to do.

According to the structure of the payout side lift conveyor 27, the payout side lift conveyor 27 is positioned just above the upper holding plate B located on the payout roller conveyor 23 by the driving of the fourth drive motor 27d. The piston rod 272 is driven by the drive of the discharge side cylinder device 27b.
By lowering b, the dispensing-side hanging heat plate 27c overlaps the hold plate B.

In this state, the holding plate B is gripped by the payout side holding structure 29a, so that the hold plate B comes into close contact with the payout side heat holding plate 27c. Next, the discharge side suspension heat plate 27c is driven by driving the discharge side cylinder device 27b.
To move the payout side suspension plate 27a to the center position in the width direction by the drive of the fourth drive motor 27d, and lower the payout side suspension heat plate 27c just above the upper relay hot plate 25, thereby lowering the payout side. By releasing the gripping by the gripping structure 29a, the hold plate B is placed on the upper relay hot plate 25 and preheated. The discharge side lift conveyor 27 that has released the hold plate B returns to the discharge roller conveyor 23, and removes the next hold plate B from the compressed wood W1.

The receiving-side lift conveyor 28 has exactly the same structure as the pay-out-side lift conveyor 27. The receiving-side lifting conveyor 28 is guided by a pair of erection frames 20d and movably suspended in the width direction. A plate 28a, a receiving cylinder device 28b erected at the center of the receiving hanging plate 28a, a receiving heat plate 28c that moves up and down by forward and reverse driving of the receiving cylinder device 28b, Provided on both sides in the front-rear direction of the side suspension heat plate 28c,
A gripping structure 29 for gripping the upper holding plate B (receiving side gripping structure 29b), and a fifth drive motor 28d for moving the receiving side hanging plate 28a forward and backward in the width direction along the erection frame 20d. Have been.

The receiving cylinder device 28b includes a cylinder 281b and a piston rod 282b projecting downward from the lower end of the cylinder 281b through the receiving suspension plate 28a. The lower end of the piston rod 282b is fixed to the receiving-side suspended heat plate 28c, and the receiving-side suspended heat plate 28c is received by the hydraulic pressure supplied from the hydraulic unit 7 so that the piston rod 282b protrudes and retracts from the cylinder 281b. It goes up and down.

The receiving-side hanging heat plate 28c has an electric heater 28e inside, and is heated by the power supplied to the electric heater 28e, and is held by the receiving-side holding structure 29a via the receiving-side hanging heat plate 28c. The heated holding plate B is preheated. The receiving-side suspended heat plate 28c
A pair of guided rods 28f in the front-rear direction is provided upright at a position separated from the center position by a predetermined distance in the front-rear direction. These guided rods 28f are respectively slidably penetrated into guide holes formed in the receiving side suspension plate 28a, whereby the receiving side suspension heat plate 28c moves up and down smoothly while maintaining the horizontal posture. It is possible to do.

According to the configuration of the receiving-side lift conveyor 28, after the receiving-side lift conveyor 28 is moved to just above the holding plate B placed on the upper relay hot plate 25 by driving the fifth drive motor 28d. By lowering the piston rod 282b by driving the receiving-side cylinder device 28b, the receiving-side hanging heat plate 28c is stacked on the hold plate B.

In this state, the holding plate B is gripped by the receiving-side holding structure 29b, so that the holding plate B comes into close contact with the receiving-side hanging heat plate 28c. Next, the receiving-side hanging heat plate 28c is driven by the driving of the receiving-side cylinder device 28b.
To move the receiving side suspension plate 28a to the right position in the width direction by driving the fifth drive motor 28d, and the receiving side suspension plate immediately above the raw wood W placed on the reception side hot plate 21. The heat holding plate 28c is moved down so that the payout side gripping structure 29a
Is released, the hold plate B is placed on the compressed wood W1. The receiving-side lift conveyor 28 in which the hold plate B is laminated on the raw wood W returns to the upper relay hot plate 25, grips the next hold plate B, and moves onto the receiving hot plate 21 again.

Next, the gripping structure 29 attached to each of the heat holding plates 27c and 28c will be described with reference to FIG. FIG. 7 is a front view showing a position embodiment of the gripping structure 29. FIG. 7A shows a state before the holding plate B is gripped.
(B) shows a state where the hold plate B is gripped. As shown in FIG. 7, the gripping structure 29 has a T-shaped support member 291 erected on the upper relay hot plate 25, and is supported by the support member 291 so as to be rotatable around a support shaft 296. A pair of gripping rods 292 in the width direction,
And a solenoid member 293 interposed therebetween.

The shaft support member 291 has a shaft support protruding piece 294 protruding outward in the width direction symmetrically at the top.
On the other hand, each of the gripping rods 292 has a bracket small piece 2 that sandwiches the pivot support piece 294 at a substantially middle position in the vertical direction.
95, and this bracket piece 295 is
The support shaft 296 is penetrated by the small bracket piece 295 and the shaft support piece 294 while holding the distal end of the support rod 4, whereby each gripping rod 292 is rotatably supported around the support shaft 296.

The length of each gripping rod 292 is set so that its lower end is located slightly below the upper relay heating plate 25, and each end has a distal end in a direction facing each other. It has a locking claw 297 projecting therefrom. The protruding position of the locking claw 297 is set such that the gap between the locking claw 297 and the lower surface of the upper relay heating plate 25 is slightly smaller than the thickness of the hold plate B.

The solenoid member 293 has a member body 298 having a widthwise direction in which a solenoid and an urging means are provided, and a pair of members in the width direction projecting outward from both ends of the member body 298. Operating rod 299.
Each of the operating rods 299 has its tip portion held by the gripping rod 2.
92. Normally, each operating rod 299 is pulled toward the inside of the member main body 298 by the urging force of the urging means. However, when the solenoid is energized, the operating rod 299 projects outward due to the generation of magnetism. ing.

Since the gripping structure 29 is configured as described above, the upper relay hot plate 25 is lowered by driving the discharge-side cylinder device 27b (FIG. 3) as shown by an arrow in FIG. And the lower surface of the upper relay hot plate 25 is the hold plate B.
Is brought into contact with the upper surface of. In this state, when the solenoid member 293 is energized, the operating rods 299 protrude from the member main body 298 in the opposite directions, so that the gripping rods 292 rotate in the opposite directions about the support shaft 296. As shown in FIG. 7B, the hold plate B is in a state where both sides are gripped by a pair of locking claws 297 in the width direction. When the energization of the solenoid member 293 is released, the operating rod 299 is retracted into the member main body 298 by the urging force of the urging means, so that the gripping rod 292 rotates around the support shaft 296 in the direction in which the locking claws 297 move away from each other. Move
As a result, the holding of the holding plate B by the locking claw 297 is released.

Next, the heat treatment apparatus 3 will be described in detail with reference to FIG. FIG. 8 is a partially cutaway perspective view showing one embodiment of the heat treatment apparatus 3. FIG. 9 is a partial perspective view showing the lower roller row 32, and FIG. 10 is a partial perspective view showing the upper roller row 33. 8 to 10.
, The XX direction is referred to as a width direction, the YY direction is referred to as a front-rear direction, and in particular, the -X direction is referred to as left, the + X direction is referred to as right, the -Y direction is referred to as rearward, and the + Y direction is referred to as forward. As shown in FIG. 8, the heat treatment apparatus 3 is formed by supporting various devices on a rectangular parallelepiped structure 30. The structure 30 has four columns 30a made of H-shaped steel.
And a top plate 30b supported on the tops of these columns 30a
And a pair of width direction side plates 30c provided at lower positions between the front and rear columns 30a.

In the structure 30, a wood inlet 3 for introducing the raw wood W from the receiving and discharging device 2 into the heat treatment device 3 is provided between the pair of rear columns 30 a in the width direction.
01 is formed, and a wood outlet 302 for guiding the compressed wood W1 in the heat treatment device 3 toward the fixing device 4 is formed between the pair of front columns 30a in the width direction.

Then, the heat treatment apparatus 3 includes a double roller conveyor 31 provided in the structure 30 and the top plate 30b.
And a compression device 34 installed in the main body. The double roller conveyor 31 includes a pair of upper and lower roller rows (a lower roller row 32 in which the rollers R are arranged in the front-rear direction and an upper roller row 33 in which each roller R faces the lower roller R). I have.

As shown in FIG. 9, the lower roller row 32 is provided with a lower roller support member 3 on a foundation 32a laid so as to extend in the front-rear direction below the structure 30 (FIG. 8).
2b. The base 32a has the same width as the gap between the pair of columns 30a facing each other in the width direction.

The lower roller supporting member 32b is
A plurality of pedestal projections 32 formed of a solid metal material and projecting from the upper surface at a predetermined pitch over the entire length in the longitudinal direction.
c, and a roller accommodation space 32d for accommodating the roller R is formed between the pedestal projections 32c. Roller support pieces 32e are press-fitted into both ends of the roller accommodation space 32d. A roller R is rotatably mounted around the roller shaft 32f between the pair of roller support pieces 32e.

The roller R is provided in the roller accommodation space 32.
d, the outer peripheral surface of the top portion is set on the pedestal projection 32c by the urging force of an urging means such as a coil spring or a leaf spring (not shown).
Is slightly higher than the flat upper surface. Therefore, when the holding plate B located on the lower roller row 32 is not pressed from above by the compression device 34, the holding plate B is supported by the roller R slightly projecting above the pedestal projection 32c by the urging force of the urging means. When the lower holding plate B is pressed by the compressing device 34 via the raw wood W, the height level of the top of the roller R becomes higher than that of the pedestal projection 32c. As a result, the holding plate B is not deformed into a waveform, and the roller R and the pedestal projection 3 are not deformed.
2c receives the pressing force of the compression device 34 while being supported equally.

At the right side of the lower roller supporting member 32b, a delivery chain 32g is stretched between predetermined sprockets along the lower roller supporting member 32b over the entire length thereof. The delivery chain 32g rotates clockwise in FIG. 9 by driving the sixth drive motor 32h. A pressing piece 32i for pressing forward the wood sandwiched between the holding plates B on the lower roller row 32 is provided at an appropriate position on the outer peripheral portion of the sending chain 32g. Accordingly, the lower roller row 3 is received from the receiving and dispensing apparatus 2 through the wood inlet 301.
The raw wood W introduced on 2 is sent out with a sending chain of 32 g.
Is pushed forward by the movement of the pressing piece 32i due to the rotation of.

The thickness of the pressing piece 32i in the vertical direction is set to be the same as the thickness of the compressed wood W1, and serves as a stopper for the descending upper roller row 33. That is, the compression cylinder device 3
The lower roller row 33 lowered by the drive of No. 5
, The further lowering is prevented, so that the raw wood W is always compressed to the same thickness dimension, and the disadvantage that the raw wood W is broken by over-pressurization is surely avoided. You.

The pair of side plates 30c of the structure 30 is provided with a pair of wood holding plates 30j for holding the raw wood W on the lower roller row 32 in a sliding state from the width direction. The introduced holding plate B and raw wood W can move on the lower roller row 32 without being laterally shifted by being guided by the wood holding plate 30j.

The upper roller row 33 has the same configuration as the lower roller row 32 except that the upper roller row 33 is turned upside down. As shown in FIG. 10, the upper roller row 33 has an upper portion inside the structure 30 (FIG. 8). It is formed via an upper roller support member 33b laminated and fixed to the lower surface of the insulating plate 33a attached to the compression device 34. The width of the insulating plate 33a is set to be the same as the gap between the pair of columns 30a facing each other in the width direction.

In this embodiment, the insulating plate 33a is made of polytetrafluoroethylene, which is a tough synthetic resin. However, the insulating plate 33a is made of silicon resin or another synthetic resin. It may be.

The upper roller supporting member 33b is
A plurality of pedestal projections 33 formed of a solid metal material and projecting from the upper surface at a predetermined pitch over the entire length in the longitudinal direction.
c, and a roller accommodating space 33d for accommodating the roller R is formed between the pedestal projections 33c. Roller support pieces 33e are press-fitted and fixed to both ends of the roller accommodation space 33d. A roller R is rotatably mounted around the roller shaft 32f between the pair of roller support pieces 33e.

The roller R is provided in the roller accommodation space 33.
d, the outer peripheral surface of the top is the pedestal projection 33c.
The projecting amount is set so as to project by urging means such as a coil spring or a leaf spring (not shown) so as to be slightly lower than the flat lower surface. Therefore, the lower roller row 32
The holding plate B pressed with a small pressure can smoothly move back and forth by the rolling of the roller R, but when pressed with a large force, is deformed into a waveform by the roller R and the pedestal protrusion 33c having different projection levels. The roller R and the pedestal projection 33c receive a pressing force.

FIG. 11 is a side sectional view of the heat treatment apparatus 3 for explaining the compression apparatus 34. As shown in FIG. 8 and FIG. 8, the compression device 34
It comprises three compression cylinder devices 35 fixed to Ob and a pressing frame 36 connected to these compression cylinder devices 35 in the structure 30. Compression cylinder device 35
Is a hydraulic cylinder 35a erected on the top plate 30b,
A piston rod 35b protrudes downward from the hydraulic cylinder 35a through the top plate 30b. The lower end of each piston rod 35b is fixed to the upper surface of the pressing frame 36, and the pressing frame 36 moves up and down in the structure 30 due to the piston rod 35b protruding and retracting from the hydraulic cylinder 35a by the driving of the compression cylinder device 35. It is supposed to.

The pressing frame 36 is, as shown in FIG.
The inside is formed in a substantially rectangular parallelepiped shape by enclosing the six sides with a steel plate, the width of the central portion in the longitudinal direction is set to be substantially the same as the width of the multiple roller conveyor 31, and the length is It is set slightly shorter than the distance between the columns 30a in the direction. The pressing frame 36 has a structure in which both ends in the longitudinal direction are formed so as to be widened in a plan view.
It has an abutment portion 36a that abuts on an opposing surface in the front-rear direction of Oa.

Each of the contact portions 36a is provided with a vertically guided groove 36b extending in the contact surface with the support 30a, while the support 30a has a guide ridge corresponding to the guided groove 36b. 30d is provided, and the guided groove 36b is provided.
Is externally fitted to and guided by the guide ridge 30d,
The lifting and lowering of the pressing frame 36 is performed smoothly.

The bottom plate of the pressing frame 36 and the insulating plate 3
3a, a plurality of connecting rods 36c arranged in two rows over substantially the entire length in the longitudinal direction are provided by bolting and the like, and the upper roller row 33 is electrically connected by the plurality of connecting rods 36c. It is electrically connected to the pressing frame 36 in an insulated state.

In the present embodiment, the roller R and the upper roller support member 33b of the upper roller row 33 are used as an upper electrode for applying a high frequency to the raw wood W, and the roller R and the lower roller of the lower roller row 32 are used. The roller support member 32b is used as the lower electrode.

Accordingly, the raw wood W sandwiched between the pair of holding plates B is introduced onto the lower roller row 32 and is moved to the upper roller row 33 via the pressing frame 36 driven by the compression cylinder device 35. Lower roller row 33 by descending,
The high frequency from the high frequency oscillator 6 is supplied through the upper roller row 33 and the lower roller row 32 in a state where the high frequency oscillator is pressed and sandwiched between the upper and lower rollers 32, and is thereby dielectrically heated in a compressed state. Will be applied.

In the present embodiment, as shown in FIGS. 8 and 11, the compressed wood W1 formed by the heat treatment device 3 is transferred to the downstream fixing device 4 between the pair of front columns 30a. A relay unit 37 that relays the transfer when the transfer is performed is provided. The relay section 37 is provided with a multiple roller conveyor 38 having the same configuration as the multiple roller conveyor 31 of the heat treatment apparatus 3 and including a lower roller row 38a and an upper roller row 38b.
0b is provided with a spiral rod 38c penetrating therethrough, and a seventh drive motor 38d for raising and lowering the spiral rod 38c.

The upper roller row 38b is connected to the lower end of the spiral rod 38c, and the seventh drive motor 38d
The upper roller row 38b is raised and lowered by the vertical movement of the spiral rod 38c due to the forward / reverse driving of the roller rod 38c.
The gap size between a and 38b can be adjusted.

[0108] The double roller conveyor 38 is provided because the compressed wood W1 formed by the compression heat treatment in the heat treatment device 3 is transported from the heat treatment device 3 to the fixing device 4. This is to prevent the thickness from recovering to the thickness.

Hereinafter, the fixing device 4 will be described with reference to FIGS. FIG. 12 shows the first fixing device 4a.
FIG. 13 is a perspective view showing one embodiment of the second fixing device 4b. As shown in FIGS. 12 and 13 and FIG. 2, in the present embodiment, as the fixing device 4, cooling water is sprayed onto the compressed wood W1 conveyed from the heat treatment device 3 to rapidly cool the compressed wood W1. First fixing device 4a for quickly fixing W1
And a second fixing device 4b that blows cooling air to the compressed wood W1 from the first fixing device 4a to perform a second-stage cooling.

The first and second fixing devices 4a, 4a,
4b is different from the second fixing device 4 in cooling method.
b is provided with a mechanism for moving the compressed wood W1 in the width direction, but the other configurations are exactly the same. Therefore, the first fixing method will be mainly described below with reference to FIG. The device 4a will be described, and only the portions of the second fixing device 4b that are different from those of the first fixing device 4a will be described. Therefore, the same parts are given the same part numbers in both cases.

As shown in FIG. 12, the first fixing device 4a is formed by mounting various devices in a rectangular parallelepiped structure 40. The structure 40 includes four columns 40a,
It comprises a top plate 40b erected on the tops of these columns 40a, and a gantry 40c provided at a lower position in the structure 40.

The first fixing device 4a comprises a double roller conveyor 41 composed of a lower roller row 42 supported by the gantry 40c and an upper roller row 43 opposed to the upper part of the lower roller row 42; Upper roller row 43
Mechanism, a roller rotating mechanism 45 for rotating each roller R of the upper roller row 43, and a first cooling device 46 as a fixing means for spraying cooling water onto the compressed wood W1 to cool it. It is provided with.

The lower roller row 42 is provided with a lower roller supporting member 42a, which is disposed on the gantry 40c and extends in the front-rear direction.
And a plurality of rollers R arranged in series in the front-rear direction on the lower roller support member 42a. The lower roller support member 42a has a plurality of roller support protrusions 42b erected at a predetermined pitch in the front-rear direction on both sides in the width direction. A roller R is rotatably supported around the roller axis between the roller support protrusions 42b opposed in the width direction.

The upper roller row 43 includes an upper roller support member 43a suspended by an elevating mechanism 44, and a plurality of rollers R arranged in series with the upper roller support member 43a in the front-rear direction. ing. The upper roller support member 43a has a plurality of roller support protrusions 43b erected at a predetermined pitch in the front-rear direction on both sides in the width direction. The roller R is rotatably supported around the roller axis between the roller support protrusions 43b opposed in the width direction.

According to the structure of the double roller conveyor 41, the compressed wood W1 sent from the heat treatment device 3 is
When the upper roller row 43 is lowered by the driving of the lifting mechanism 44, the roller R is rotated by the driving of the roller rotating mechanism 45 and is sent to the second fixing device 4b while being held between the two roller rows 42, 43. Will be.

The lifting mechanism 44 is mounted on the top plate 40b.
, Four nut members 44b fixed to the back side of the top plate 40b with the respective spiral rods 44a penetrating, and four nut members 44b A screw shaft 44c disposed in the front-rear direction so as to mesh with a nut (not shown) housed in 44b, and a top plate 40 for rotating the screw shaft 44c.
and an eighth drive motor 44d mounted on the drive motor b.

A drive pulley 441d is concentrically fixed to the drive shaft of the eighth drive motor 44d, while a driven pulley 4 corresponding to the drive pulley 441d is fixed to the screw shaft 44c.
41c are fixed concentrically, and these pulleys 441d, 44
An endless belt 44e is stretched between 1c. Accordingly, the drive rotation of the eighth drive motor 44d is controlled by the drive pulley 4
The power is transmitted to the screw shaft 44c via the endless belt 41d, the endless belt 44e, and the driven pulley 441c. And
A support plate 47 for supporting the upper roller support member 43a is fixed to the lower end of each spiral rod 44a.

According to the elevating mechanism 44, by driving the eighth drive motor 44d in the forward / reverse direction, the drive rotation is transmitted to the screw shaft 44c via the drive pulley 441d, the endless belt 44e and the driven pulley 441c. The screw shaft 44c rotates forward and backward. The forward / reverse rotation is transmitted to a nut (not shown) in the nut member 44b. The forward / reverse rotation of the nut causes the spiral rod 44a to move up and down, thereby moving the upper roller row 43 up and down via the support plate 47.

The roller rotation mechanism 45 includes a ninth drive motor 45a mounted on a support plate 47, a drive sprocket 45b concentrically fixed to a drive shaft of the ninth drive motor 45a, and a drive sprocket 45b. An endless chain 45c stretched between each roller R of the upper roller row 43. The counterclockwise drive rotation of the drive sprocket 45b driven by the ninth drive motor 45a is transmitted to each roller R of the upper roller row 43 via the endless chain 45c.
All of the rollers R are rotated counterclockwise around the roller axis, so that the compressed wood W1 between the pair of holding plates B sandwiched between the multiple roller conveyors 41 is transported toward the second fixing device 4b. Will be.

The first cooling device 46 includes a cooling water pump 46a for pumping cooling water from a cooling water source 460 such as a tap.
And a cooling water pipe 46b whose base end is connected to the discharge side of the cooling water pump 46a and whose distal end is disposed on the structure 40 so as to extend along the lower roller row 42 on both sides in the width direction. A plurality of spray nozzles 46 provided in the pipe 46b
c. The spray nozzle 46c has its spray port directed to the side surface of the compressed wood W1 on the lower roller row 42.

The compressed wood W1 sandwiched between the pair of holding plates B sent from the heat treatment apparatus 3 to the first fixing apparatus 4a is pressed on the lower roller row 42 by the upper roller row 43. The cooling water sprayed from the spray nozzle 46c is supplied, and the compressed state is fixed by rapid cooling.

As shown in FIG. 13, the second fixing device 4b has exactly the same structure as the first fixing device 4a shown in FIG. 12 with respect to the multiple roller conveyor 41, the elevating mechanism 44 and the roller rotating mechanism 45. Therefore, the description thereof is omitted.

Then, in the second fixing device 4b,
In place of the first cooling device 46 of the first fixing device 4a, a second cooling device 48 for injecting and supplying cooling air toward the compressed wood W1 is provided. The second cooling device 48 has a suction blower 48a for sucking and sending outside air and a base end side connected to a discharge side of the suction blower 48a, and a front end side along the lower roller row 42 on both sides in the width direction. It comprises a cool air pipe 48b provided in the structure 40, and a plurality of injection nozzles 48c provided in each cool air pipe 48b. The spray nozzle 48c has a spray port directed toward the side surface of the compressed wood W1 on the lower roller row 42.

Further, the second fixing device 4b is provided with a chain conveyor 49 disposed so as to cross the lower roller row 42 as a unique device not provided in the first fixing device 4a. The chain conveyor 49 includes an equipment mounting table 49a on which the entire equipment of the conveyor device is mounted, an endless chain 49b mounted on the equipment mounting table 49a, and a tenth drive motor 49 for driving the endless chain 49b to rotate.
c, and a mounting table elevating cylinder device 49d that moves up and down the device mounting table 49a.

The device mounting table 49a has a pair of side walls 491a formed by bending both sides of a rectangular steel plate so as to face each other. A chain support plate 492a is formed on the upper edges of the pair of side walls 491a. Further, a side wall 4 is provided at one corner of the device mounting table 49a.
Motor support plate 49 projecting outward from 91a
The tenth drive motor 49c is mounted on the motor support plate 493a.

The drive shaft of the tenth drive motor 49c is
A drive rod 491c penetrating through a pair of side walls 491a so as to be rotatable around an axis is integrally connected concentrically. The drive rod 491c is provided with concentric sprockets 49e at both ends protruding outward from the side wall 491a. A driven rod 492c rotatably rotatable around the axis is provided between the other ends of the pair of side walls 491a. Sprockets 49e are also provided at both ends of the driven rod 492c protruding outside from the side walls 491a. It is provided concentrically.

The pair of endless chains 49b
Are extended between a pair of sprockets 49e located outside the side wall 491a so that the outgoing chain passes over the chain support plate 492a.

The mounting table elevating / lowering cylinder device 49d includes:
Four units are provided to face the four corners of the rear surface of the device mounting table 49a. These mounting table elevating cylinder devices 49d include a cylinder 491d and a piston rod 492d protruding upward from the cylinder 491d. The piston rod 492d receives and receives a supply of hydraulic pressure from the hydraulic unit 7, and protrudes and retracts upward from the cylinder 491d, whereby the device mounting table 49a moves up and down.

The equipment mounting table 49a is driven by the mounting table lifting / lowering cylinder device 49d to drive the endless chain 49a.
The forward chain b can be moved up and down between a lower position where the lower chain is located below the upper surface of the lower roller row 42 and an upper position where the same chain is located above the upper surface level.

According to the structure of the chain conveyor 49, the endless chain 49b does not buffer with the holding plate B when the equipment mounting table 49a is set at the lower position. Can be introduced onto the lower roller row 42. Then, in a state where the upper roller row 43 is raised, the raw wood W between the pair of hold plates B positioned on the lower roller row 42 is moved to the upper position by driving the mounting table elevating cylinder device 49d. By ascending, a pair of endless chains 49
It becomes a state supported by b.

In this state, the tenth drive motor 49c is driven to rotate the endless chain 49b between the sprockets 49e, so that the compressed wood W1 sandwiched between the holding plates B is second fixed while being guided by the endless chain 49b. It is led to the outside from the chemical conversion device 4b.

As described above, the first fixing device 4a is
The compressed wood W1 sandwiched between the pair of holding plates B sent to the fixing device 4b is pressed by the upper roller row 43 on the lower roller row 42, and the cooling air injected from the injection nozzle 48c. Is supplied, thereby performing the second-stage cooling process, and water droplets formed on the side surface of the compressed wood W1 and the surface of the holding plate B are evaporated by spraying the cooling water with the first fixing device 4a. The compressed wood W1 is sent out in a dry state from the second fixing device 4b, where it is supplied with cooling air from the second cooling device 48, and after being dried, is led to the next step by driving the chain conveyor 49. Is done.

A return roller conveyor 51 is laid in parallel to the right side of the heat treatment device 3 and the fixing device 4 (an upper position on the paper surface of FIG. 3), and is returned by the chain conveyor 49. The compressed wood W1 between the holding plates B transferred to the delivery roller conveyor 23 of the receiving and delivery device 2 is driven by the return roller conveyor 51 driven by the eleventh drive motor 52.
Will be conveyed toward.

In the present embodiment, the receiving roller conveyor 22 of the receiving and dispensing device 2, the multiple roller conveyor 31 of the heat treatment device 3, the multiple roller conveyor 41 of the first fixing device 4a, and the second fixing device 4b, the roller conveyor 41 of the second fixing device 4b, the return roller conveyor 51, the payout roller conveyor 23 of the receiving / discharging device 2, the payout lift conveyor 27 of the receiving / discharging device 2 and the receiving side. The circulation conveyor means 5 according to the present invention, together with the lift conveyor 28
Are formed.

The operation control of the compressed wood manufacturing apparatus 1 configured as described above will be described below. As shown in FIG. 3, a control device 8 is provided in the vicinity of the compressed wood producing device 1, and each device is properly operated under the control of the control device 8, and a plurality of pairs of hold plates B are properly adjusted in the device. Circulating in
As a result, the raw wood W sequentially supplied to the receiving hot plate 21 becomes the compressed wood W1, and the payout roller conveyor 23
A continuous operation that is sequentially taken out from the top to the outside is performed.

FIG. 14 is a block diagram showing one embodiment of the operation control of the compressed wood producing apparatus 1. As shown in FIG. As shown in this figure, the control device 8 has a central processing unit C
PU (Central Processing Un
It) 81 and a main storage device 82. Many programs for performing the operation control are stored in the main storage device 82, and necessary programs are stored in the CP.
By being sequentially loaded and executed in U81, an appropriate control signal is output from the control device 8 to a predetermined device each time, and the operation of the device in conjunction with other devices causes the raw wood W to be compressed in a compressed state. Heat treatment by dielectric heating is sequentially performed.

In order to execute such operation control, various sensors are installed at appropriate places of each device, and the detection signals from these sensors are inputted to the control device 8 one by one, so that the control device 8 The kind of control signal to be output is determined, and the raw wood W is appropriately processed by the cooperative operation of each device based on the control signal output to each device in this way.

In this embodiment, as shown in FIG. 3 and FIG. 14, the receiving / discharging device 2 includes the receiving-side hot plate 21, the discharging roller conveyor 23, the lower relay hot plate 24, and the upper relay hot plate 25. First presence / absence sensor 801 for detecting presence / absence of holding plate B or raw wood W
An existence sensor 802, a third existence sensor 803, and a fourth existence sensor 804 are provided. Of the above sensors,
The first presence / absence sensor 801 can detect the presence / absence of the holding plate B on the receiving-side hot plate 21 and the presence / absence of the raw wood W.

Further, the heat treatment apparatus 3 has a first presence / absence sensor 805 for detecting whether or not the raw wood W exists between the roller rows 32 and 33 of the double roller conveyor 31, and a temperature of the compressed wood W1. A temperature sensor 806 is provided.

Further, the first fixing device 4a is provided with a second presence / absence sensor 807 for detecting whether or not the raw wood W exists between the roller rows 42 and 43 of the multiple roller conveyor 41. The second fixing device 4b is also provided with a third presence / absence sensor 808 for detecting whether or not the compressed wood W1 exists between the roller rows 42 and 43.

The most upstream side and the most downstream side of the return roller conveyor 51 are provided with the compressed wood W1 at those positions.
A fifth presence / absence sensor 809 and a sixth presence / absence sensor 810 for detecting the presence / absence of are provided.

When the detection signals from these sensors 801 to 810 are input to the control device 8, C
The PU 81 discriminates the detection signals of these sensors based on a program, and outputs a control signal as a result of the discrimination to a predetermined device. The operation control (operation control when the hold plate B is appropriately circulated and conveyed along the circulating conveyance means 5) will be described below.

In this embodiment, the control device 8
Is provided with a timer 83, and a task time is set in the timer 83. The task time varies depending on the scale and performance of the apparatus, but in the present embodiment, 6 minutes is employed. Then, the control device 8 basically outputs a control signal when the timer 83 expires (that is, when 6 minutes have elapsed), and conveys the hold plate B from the upstream device to the downstream device every 6 minutes. However, prior to this, a detection signal from each sensor is determined, and after confirming that each device is operating properly, a control signal is output. The following description made with reference to FIG. 15 is a case where six minutes of the task time have elapsed and immediately after the next task time has started.

FIGS. 15 (a) to 15 (d) show the state of circulation of the hold plate B circulating in the compressed wood producing apparatus 1. Black paint indicates that the raw wood W is sandwiched between the pair of hold plates B. In the illustrated state and the stippling, there is no raw wood W between the holding plates B, and only the holding plate B is shown.

First, FIG. 15A shows a state immediately after the start of the task time. In this state, the raw timber sandwiched by the holding plate B on the receiving hot plate 21 of the receiving and dispensing apparatus 2 is shown. W (holding wood WB) is placed,
It is on standby while being preheated by the receiving-side hot plate 21. The holding plate B is placed on the lower relay hot plate 24 and the upper relay hot plate 25 of the receiving and dispensing device 2, respectively, and is preheated. And the receiving and dispensing device 2
Is empty, on which both the raw wood W and the hold plate B do not exist on the delivery roller conveyor 23.

Further, in the heat treatment apparatus 3, the raw wood W becomes the compressed wood W 1 and is held by the holding plate B (the compressed wood WB 1 to be held) is pressed and held between the multiple roller conveyors 31. And the first fixing device 4
In a, the compressed wood to be held WB1 is subjected to the primary cooling by being sprayed with the cooling water from the spray nozzle 46c while being sandwiched by the multiple roller conveyor 41, and the second fixing device 4b Then, hold compressed wood WB
1 is subjected to a second cooling and drying process by receiving spray of cooling air from the injection nozzle 48c while being sandwiched between the multiple roller conveyors 41. The drive of the return roller conveyor 51 is stopped, and the compressed wood WB1 to be held is waiting to be conveyed toward the receiving / dispensing device 2 while being located at the downstream end of the return roller conveyor 51.

The state shown in FIG. 15A is as follows.
Immediately after the elapse of 6 minutes of the task time.

In this state, the first presence / absence sensor 8
01 detects the presence of the wood WB to be held on the receiving hot plate 21, the second presence / absence sensor 802 detects that the delivery roller conveyor 23 is empty, and the third and fourth presence / absence sensors 803, 804 are each relay hot plate 2
The first presence / absence sensor 805 detects the presence of the hold plate B on each of the rollers 4, 25, and the presence / absence of the compressed wood WB1 to be held between the multiple roller conveyors 31.
The presence / absence sensor 807 detects the presence of the compressed wood WB1 to be held between the multiple roller conveyors 41 of the first fixing device 4a, and the third presence / absence sensor 808 detects between the multiple roller conveyors 41 of the second fixing device 4b. The presence / absence of the compressed wood WB1 is detected, the fifth presence / absence sensor 809 detects that the compressed wood WB1 is not present at the uppermost stream of the return roller conveyor 51, and the sixth presence / absence sensor 810 detects , Return roller conveyor 51
Is detected that the compressed wood WB1 to be held is present at the downstream end of.

By inputting these detection signals to the control device 8, the CPU 81 determines that the raw wood W and the holding plate B are properly processed in the compressed wood manufacturing apparatus 1, and thereafter, the CPU 81 By sequentially outputting the control signal to the equipment, the hold plate B sequentially moves the circulating conveyance means 5 and the compression heat treatment and the fixing treatment of the raw wood W are properly performed.

If any of the detection signals is abnormal, an alarm to that effect is output to an output device (not shown). Therefore, the operator can recognize from the alarm that the compressed wood producing apparatus 1 is not functioning properly and can perform an action for restoration.

When the compressed wood producing apparatus 1 is functioning normally, the control unit 8 first controls the eleventh drive motor 52 (FIG. 3) of the return roller conveyor 51 and the second drive motor of the receiving / discharging apparatus 2. A drive signal is simultaneously output to the return roller conveyor 23b (FIG. 4), and the compressed roller WB1 held at the downstream end of the return roller conveyor 51 by the simultaneous driving of the return roller conveyor 51 and the discharge roller conveyor 23 is supplied to the discharge roller. It is transported to a fixed position on the conveyor 23.

The arrival of the compressed wood WB1 to be held at the home position is detected by the second presence / absence sensor 802, and the second drive motor 23b
Is stopped, and the held compressed wood WB1 is discharged onto the discharge roller conveyor 23 as shown in (b) of FIG.

Then, by driving the eighth drive motor 44d of the second fixing device 4b, the upper roller row 43 is raised, and in this state, the mounting table elevating cylinder device 49d is driven to move to the second fixing device 4b. Held compressed wood W
B1 is placed on the endless chain 49b and then conveyed from the second fixing device 4b to the upstream side of the return roller conveyor 51 by the driving of the tenth drive motor 49c. When this is detected by the fifth presence / absence sensor 809, the mounting table elevating cylinder device 49d is driven in reverse, and the device mounting table 49
a descends, and the held compressed wood WB1 sent out from the second fixing device 4b is placed on the return roller conveyor 51.

When the inside of the second fixing device 4b becomes empty, the ninth drive motor 45a is driven to drive the first fixing device 4a.
The held compressed wood WB1 in the heat treatment device 3 is sent out to the first fixed device 4a that has been emptied, while the compressed wood WB1 in the inside is sent out to the second fixing device 4b.
1 is fed by the drive of the sixth drive motor 32h, and the held wood WB on the receiving-side hot plate 21 of the receiving and dispensing device 2 is further driven by the first drive motor 22b in a state where the chain conveyor 26 is lowered. It is conveyed toward the heat treatment apparatus 3 which became empty.

When the held wood WB is sent from the receiving / discharging device 2 to the heat treatment device 3, the upper roller row 33 is raised to the upper position by the driving of the compression cylinder device 35, and the held wood WB is moved to the roller row 32. , 3
After being mounted between the three rollers, the upper roller row 33 is lowered to perform compression processing, and a high frequency from the high frequency oscillator 6 is applied to perform heat treatment by dielectric heating.

On the other hand, in the fixing device 4, the compressed wood WB1 to be held is fed from the upstream side with the gap between the roller rows 42 and 43 of the multiple roller conveyor 41 being set in advance. . This is because, in the case of the heat treatment apparatus 3, since the roller R has a pressure-resistant structure so as to withstand a large pressure, it is difficult to rotate the roller R itself, and the pressed piece of compressed wood WB1 is pressed by the pressing piece 32i. This is because the fixing device 4 moves the compressed wood WB1 to be held by rotating the roller R.

Then, the compressed wood to be held WB1 conveyed to the first fixing device 4a is subjected to a first cooling treatment by water cooling, is fixed, and is introduced into the second fixing device 4b. The compressed wood WB1 to be held is
A second cooling process is performed by air cooling.

The movement of the compressed wood WB1 to be held and the wood WB to be held from the upstream device to the downstream device is detected by the first to third presence / absence sensors 805, 807, 808 and the fifth presence / absence sensor 809. This is performed appropriately by the output of the control signal from the control device 8 based on.

Then, a pair of holding plates B, which have been preheated by the relay heating plates 24 and 25 shown in (b) of FIG. While being fed by the drive of the side lift conveyor 28, the compressed wood W1 is taken out from the held compressed wood WB1 located on the payout roller conveyor 23, and the state shown in FIG.

In this state, the raw wood W is placed on the hold plate B on the receiving hot plate 21, and the hold plate B held by the receiving lift conveyor 28 is stacked on the raw wood W. As a result, as shown in FIG. 15 (d), new wood to be held WB is formed on the receiving and dispensing device 2.

Next, the compressed wood WB1 to be held, which was located at the upstream end of the return roller conveyor 51 by the drive of the eleventh drive motor 52, is transported to the downstream end thereof, whereby the compressed wood WB1 in the compressed wood manufacturing apparatus 1 is conveyed. The arrangement state of the hold wood WB and the hold compressed wood WB1 returns to the original state shown in FIG.

The series of operations of each device as described above are repeated for each task time, so that the raw wood W sequentially supplied to the receiving-side hot plate 21 of the receiving and dispensing apparatus 2 is
The so-called continuous processing is realized in which the compressed wood W1 is sequentially discharged from the discharge roller conveyor 23 of the receiving and discharging device 2 as the compressed wood W1.

The temperature sensor 806 is connected to the heat treatment apparatus 3
The temperature of the compressed wood W1 detected by the temperature sensor 806 is input to the control device 8 one by one. On the other hand, the control device 8
A reference temperature rise curve of wood due to dielectric heating is input to the main storage device 82. The reference temperature curve is compared with the history of the detected temperature. If the difference exceeds a predetermined range, an abnormal signal is output. Is output.

As described in detail above, the compressed wood production apparatus 1 of the present invention is obtained by the heat treatment apparatus 3 for performing heat treatment by applying high frequency while compressing the raw wood W, and the heat treatment apparatus 3. And a fixing device 4 for fixing the compressed state of the compressed wood W1.
In addition, the heat treatment apparatus 3 compresses the raw wood W sandwiched between the pair of holding plates B between the pair of double roller conveyors 31 by driving the compression cylinder device 35.
The raw wood W supplied to the heat treatment apparatus 3 while being sandwiched between the pair of hold plates B is configured to apply the high frequency from the high frequency oscillator 6 to the The compression process is performed by the multiple roller conveyor 31, and the uneven pressing force of the plurality of rollers against the raw wood W is made uniform by passing through the holding plate B, whereby high frequency is applied while uniform compression process is performed. By doing so, the compressed wood W1 becomes appropriate.

The fixing device 4 is configured to cool the compressed wood W1 between the pair of holding plates B while maintaining the compressed state between the pair of multiple roller conveyors 31. Compressed wood W1 sent to
While being held in a pressed state between the hold plates B via the multiple roller conveyor 41, the compressed water is cooled by receiving the spray of cooling water from the first cooling device 46, whereby the compressed wood W1 is fixed in a compressed state. .

The compressed wood W1 formed by the heat treatment device 3 is sandwiched between the pair of holding plates B and sandwiched between the multiple roller conveyors 31 and 41, and the compressed wood W1 is fixed to the fixing device 4 by the heat treatment device 3. Is conveyed while maintaining the compressed state, the inconvenience of the compressed state being eliminated during the conveyance can be reliably avoided.

As described above, since the double roller conveyor 31 and the holding plate B are employed as members for compressing the raw wood W, the raw wood W can be appropriately compressed, and the compressed state is maintained. The transport of the compressed wood W1 from the heat treatment device 3 to the fixing device 4 is easily and reliably performed. Therefore, the compressed wood W1 which has been subjected to the compression treatment and the dielectric heating between the pair of holding plates is
It is no longer necessary to perform the troublesome work that has been conventionally performed, such as once taking out from between the hold plates and holding the plate between the hold plates B and fastening with the fasteners. Manufacturing costs can be reduced.

In the above-described embodiment, the wood loading device (the receiving-side hot plate 21 and the receiving-side lift conveyor 28) provided on the upstream side of the heat treatment device 3 and sandwiching the raw wood W between the pair of holding plates B is provided. And taking out, from the pair of holding plates B, the compressed wood W1 formed in the heat treatment step and fixed in the compression state by the fixing device 4 on the downstream side of the fixing device 4. A circulating transport path (receiving-side heat transfer device) that circulates a device (comprising a delivery roller conveyor 23 and a delivery lift conveyor 27), a wood loading device, a heat treatment device 3, a fixing device 4, and a wood removal device to the holding plate B. The plate 21 and the receiving side lift conveyor 28, the multiple roller conveyor 31, the multiple roller conveyor 41, the chain conveyor 49, and the return roller conveyor 51 (A discharge roller conveyor 23, a discharge side lift conveyor 27, and a chain conveyor 26), so that the holding plate B is circulated along the annular transport path, and the pair of holding plates B are connected to each other in the wood loading device. Is loaded with the raw wood W, the raw wood W is subjected to a heat treatment by dielectric heating in a compressed state in the heat treatment apparatus 3 along with the movement of the hold plate B along the annular conveyance path, and becomes the compressed wood W1, The fixing plate 4 is fixed by cooling treatment, and the holding plate B emptied by taking out the compressed wood W1 from between the holding plates B by the wood removal device is returned to the wood loading device again and returned. By sandwiching the raw wood W on the holding plate B, the compressed wood W1 can be manufactured continuously.

Further, in the receiving and dispensing device 2,
Since the raw wood W is preheated via the hold plate B, the raw wood W sandwiched by the hold plate B
Is preheated during the waiting period, and particularly the surface side becomes high temperature, and the disadvantage of high-frequency heating, in which the surface temperature is unlikely to rise in the next heat treatment apparatus 3, can be avoided. it can.

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

(1) In the above embodiment, the receiving-side hot plate 21, each of the relay hot plates 24 and 25, the payout-side hanging hot plate 27c, and the receiving-side hanging hot plate 28c are all heated by the electric heater. However, the present invention is not limited to the heating of each heating plate by the electric heater, but may be performed by heating with steam or heat oil.

(2) In the above embodiment, the return roller conveyor 51 is laid between the second fixing device 4b and the receiving / discharging device 2, but in this portion,
In particular, since processing such as pressurization of the compressed wood W1 is not performed and only the compressed wood W1 is transported, other transporting devices such as a belt conveyor and a chain conveyor other than the roller conveyor are employed. Is also good.

[0173]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventors have found that high-frequency heating is effective in permanently fixing deformation in the production of compressed wood, and have invented a compressed wood production system to which this is applied. Specifically, when considering the production of thick compressed wood for the purpose of expanding the use of cedar wood, the biggest problem was the supply of raw wood. For example, in the case of manufacturing compressed wood having a compression ratio of 50% and a product thickness of 30 mm, raw wood having a thickness of 60 mm is required, and using a large amount of such large-section wood significantly increases the cost. Becomes
Not realistic.

Accordingly, production of laminated compressed wood was attempted for the purpose of reducing the cost of raw materials. This time, using lamina of various thickness dimensions, we examined a method of simultaneous processing of lamination bonding by high frequency heating and fixing of compression deformation. Furthermore, in the continuous production line, a system for effectively transporting pressurized wood was completed, which is the same as the compressed wood manufacturing apparatus 1 according to the present invention described in detail above as one embodiment. .

In the heat treatment apparatus 3, a high-frequency oscillator 6 of 15 kW was employed. The total pressure applied to the raw wood W was 184 t. Further, in the above-described embodiment, the description is omitted, but heating oil is supplied into the lower roller support member 32b (FIG. 9) and the upper roller support member 33b (FIG. 10), and the heat transfer heating (that is, A laminated compressed wood was manufactured by heating the surface of the raw wood W by a hot plate heating method and assisting high frequency heating.

As the test material, cedar wood from Yoshino, Nara Prefecture was used. Its specific gravity is 0.36, average annual ring width is 3.6mm,
The water content was 10.5%. 100 of such cedar wood
(R) × 300 (L) × 2.3, 4.5, 6.8, 1
0.0, 12.0, 15.0, 20.0, 60 (T) m
A ground plate of m was used as the lamina.

Then, 60 (T) × 100 (R) × 30
The laminated mat of 0 (L) mm was thermally compressed at a compression ratio of 50%, a high frequency of 5.6 kW was intermittently applied for 3 minutes, and the temperature was maintained for 4 minutes, followed by cooling, and a sample was taken out. Incidentally, when laminating the lamina, adhesives to be provided between the lamina include aqueous vinyl urethane resin (VU), urea resin (U), melamine urea resin (MU), melamine resin (M), and resorcinol (R). Five types were used.

The graph of FIG. 16 shows that the lamination number
The water absorption recovery (restoration of the compression size by water absorption) in the case of 1, 3, 6, 12, and 20 layers is shown. As can be seen from this graph, each laminated material shows a slightly higher degree of recovery near the tip of 3 to 4 cm from the end surface, as in the case of solid wood (one having the number of laminated layers), but near the center, The deformation is substantially fixed. The degree of recovery is slightly reduced as the number of layers increases. This is considered to be because the shrinkage of the material expanded in the horizontal direction due to the compression is suppressed by the lamination.

FIG. 17 is a graph showing the relationship between the number of layers of compressed wood, bending strength and bending elastic modulus. As shown in this graph, no difference in bending strength and flexural modulus depending on the number of layers was observed.

Based on the research results so far, the target of the product was set to the handrail, and the system was developed in consideration of the initial cost and running cost. It is a manufacturing method and a manufacturing apparatus. The features (advantages) of the present invention are listed below.

Since high-frequency dielectric heating is used, compressed wood having a large cross section can be deformed and fixed in a short time.

Since a mechanism for transporting the material in a pressurized state is provided and the heating step (heat treatment step) and the fixing step (cooling step) are separated, productivity can be increased.

Since a conventionally used mold for fastening and maintaining the compressed state of wood is not used, it is possible to cope with various product sizes.

It is possible to use a laminated material, and it is possible to simultaneously perform laminating adhesion of the material and fixing of deformation.

[0185]

According to the first and second aspects of the present invention,
The raw wood is compressed via a roller conveyor by a compression device (compression process) while being sandwiched between a pair of hold plates, so that the pressing force on the raw wood by the plurality of rollers is made uniform through the hold plate. be able to. In addition, since the raw wood is subsequently heat-treated in a heat treatment apparatus (heat treatment step) while maintaining a uniform compression treatment, the raw wood can be appropriately converted into compressed wood by softening the wood structure by this heat treatment. . The compressed wood is cooled while being held between the hold plates in a pressed state via the roller conveyor in the next cooling device (cooling process), so that the compressed state can be reliably fixed.

Since the compressed wood is sandwiched between the roller conveyors via the holding plate, the compressed wood is
The rotation of the rollers on the roller conveyor allows easy transfer from one device to another.

As described above, since the roller conveyor and the holding plate are employed as the members for compressing and transferring the raw wood, the compressed state of the raw wood can be appropriately maintained, and the wood can be transferred from one device to another. Transfer to the device can be easily performed. This eliminates the need for the conventional troublesome work of once compressing and inductively heating compressed wood between a pair of hold plates, removing the compressed wood from between the hold plates, clamping it between the hold plates, and fastening it with a fastener. Accordingly, workability can be improved by that much.

According to the third aspect of the present invention, since the raw wood is heat-treated by applying a high frequency in the heat treatment apparatus, the raw wood can be rapidly heat-treated by dielectric heating by applying the high frequency. .

According to the fourth aspect of the present invention, while the holding plate is circulated with the wood loading device, the compression device, the heat treatment device, the cooling device, the wood removal device and the wood loading device, a pair of holding plates is provided in the wood loading device. By loading the raw wood into the raw wood, a compression process is performed on the raw wood along with the movement of the hold plate along the annular transport path by the compression device.
Heat treatment by dielectric heating can be performed in the heat treatment device, and the cooling process is performed by the cooling device to stabilize the fixation of the compressed state. And
The empty holding plate can be returned to the wood loading device again by removing compressed wood from between the holding plates by the wood removing device. Therefore, it is possible to sequentially take out the raw wood sequentially supplied to the wood loading device by the circulation movement of the holding plate as the compressed wood from the wood removal device, thereby continuously manufacturing the compressed wood. it can.

According to the fifth aspect of the present invention, since the hold plate is formed of a conductive material, it is possible to apply a high frequency to the raw wood through the hold plate, and it is necessary to separately provide a high frequency electrode. This can contribute to a reduction in equipment cost.

[Brief description of the drawings]

FIG. 1 is a process chart showing one embodiment of a method for producing compressed wood according to the present invention.

FIG. 2 is a perspective view showing one embodiment of a manufacturing apparatus applied to a method for manufacturing compressed wood.

FIG. 3 is a plan view of the raw wood production apparatus shown in FIG.

FIG. 4 is a partially cutaway perspective view showing an embodiment of the receiving and dispensing apparatus.

5 is a view of the receiving and dispensing apparatus shown in FIG.

FIG. 6 is a B-view of the receiving and dispensing device shown in FIG. 4;

FIG. 7 is a front view showing a position embodiment of the gripping structure;
(A) is the state before holding the hold plate, (b) is
The state where the hold plate was gripped is shown.

FIG. 8 is a partially cutaway perspective view showing one embodiment of the heat treatment apparatus.

FIG. 9 is a partial perspective view showing an embodiment of a lower roller row.

FIG. 10 is a partial perspective view showing an embodiment of an upper roller row.

11 is a heat treatment apparatus 3 for explaining the compression apparatus 34. FIG.
It is sectional drawing of the side view of FIG.

FIG. 12 is a perspective view showing an embodiment of a first fixing device.

FIG. 13 is a perspective view showing an embodiment of a second fixing device.

FIG. 14 is a block diagram showing one embodiment of operation control of the compressed wood production apparatus.

15 (a) to (d) are diagrams showing a circulation state of a hold plate circulating in the compressed wood manufacturing apparatus, where black paint indicates a state in which the raw wood W is sandwiched between a pair of hold plates, stippling. Indicates a state in which there is no raw wood W between the hold plates and only the hold plate, and a hatched portion indicates a state in which only the wood is provided.

FIG. 16 shows that the number of laminated laminas is 1, 3, 6, 12, and 20.
It is a graph which shows the water absorption recovery (restoration of the compression dimension by absorbing water) of the compressed wood in the case of a layer.

FIG. 17 is a graph showing the relationship between the number of layers of compressed wood, bending strength, and bending elastic modulus.

FIGS. 18A and 18B are conceptual diagrams for explaining a conventional compressed wood manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressed wood manufacturing apparatus 2 Receiving and dispensing apparatus 20 Frame 20a Base frame 20b Support column 20c Beam frame 20d Erecting frame 20e First support plate 20f Second support plate 20g Third support plate 20h Intermediate beam frame 21 Receiving-side hot plate 21a Electric heater 21b First cylinder device 22 Receiving roller conveyor 22a Bracket 22b First drive motor 22c Endless belt 23 Discharge roller conveyor 23a Roller support plate 23b Second drive motor 24 Lower relay hot plate 24b Second cylinder device 24c Electric heater 25 Upper relay hot plate 25a Plate support member 26 Chain conveyor 26a Endless chain 26b Sprocket 26c Rotary shaft 26d Third drive motor 26e Elevating cylinder device 27 Discharge side lift conveyor 271b Cylinder 272b Piston Hood 27a Discharge side suspension plate 27b Discharge side cylinder device 27c Discharge side suspension heat plate 27d Fourth drive motor 27e Electric heater 27f Guided rod 28 Receiving side lift conveyor 281b Cylinder 282b Piston rod 28a Receiving side suspension plate 28b Side cylinder device 28c Receiving-side hanging heat plate 28d Fifth drive motor 29 Holding structure 29a Discharging-side holding structure 29b Receiving-side holding structure 291 Shaft support member 292 Holding rod 293 Solenoid member 294 Shaft support piece 295 Bracket small piece 296 Support shaft 297 Locking claw 298 Member body 299 Operating rod 3 Heat treatment device 3 Heat treatment device 30 Structure 301 Wood inlet 302 Wood outlet 30a Support 30b Top plate 30c Side plate 30d Guide protrusion 31 Double roller conveyor 32 Lower roller row 3 a foundation 32b lower roller support member 32c pedestal projection 32d roller housing space 32f roller shaft 32g delivery chain 32h sixth drive motor 32i pressing piece 33 upper roller row 33a insulating plate 33b upper roller support member 33c pedestal protrusion 33d roller housing space 33e roller Supporting piece 34 Compression device 35 Compression cylinder device 35a Hydraulic cylinder 35b Piston rod 36 Pressing frame body 36a Contact portion 36b Guided groove 36c Connecting rod 37 Relay portion 38 Double roller conveyor 38a Lower roller row 38b Upper roller row 38c Spiral rod 38d First 7 drive motor 4 fixing device 4a first fixing device 4b second fixing device 40 structure 40a column 40b top plate 40c gantry 41 double roller conveyor 42 lower roller row 43 upper roller row 4 a Lower roller support member 42b Roller support protrusion 43 Upper roller row 43a Upper roller support member 43b Roller support protrusion 44 Elevating mechanism 441c Followed pulley 441d Drive pulley 44a Spiral rod 44b Nut member 44c Screw shaft 44d Eighth drive motor 45 Roller rotation mechanism 45a Ninth drive motor 45b Drive sprocket 45c Endless chain 46 First cooling device 460 Cooling water source 46a Cooling water pump 46b Cooling water piping 46c Spray nozzle 47a Support plate 48 Second cooling device 48a Suction blower 48b Cold air piping 48c Injection nozzle 49 Chain conveyor 49a Equipment mounting table 491a Side wall 492a Chain support plate 493a Motor support plate 49b Endless chain 49c Tenth drive motor 491c Drive rod 492c Follower rod 4 d Cylinder device for raising and lowering mounting table 491d Cylinder 492d Piston rod 49e Sprocket 5 Circulation conveyance means 51 Return roller conveyor 6 High frequency oscillator 7 Hydraulic unit 7 8 Control device 81 CPU 82 Main storage device 83 Timer 801 to 804 First to fourth presence / absence sensors 805 First presence / absence sensor 806 Temperature sensor 807,808 Second / third presence / absence sensor 809,810 Fifth / sixth presence / absence sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nakaya, 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Inventor Koji Yamamoto 6-3-12, Kamio, Tenno-ku, Osaka Yamamoto Inside the Vinita Co., Ltd. (72) Inventor Junichi Kodama 6-3-12 Kamishio, Tennoji-ku, Osaka City Inside Yamamoto Vinita Co., Ltd. (72) Toshiyuki Kawamura 6-3-12 Kamio, Tennoji-ku, Osaka Yamamoto Binita Inc. F-term (reference) 2B230 AA27 BA01 EB05 EB06 EB11 EB13 EB29 EC10 EC14 EC24

Claims (5)

[Claims] A compression step of compressing raw wood;
A heat treatment step of heat-treating the compressed wood obtained in the compression step, and a cooling step of cooling the heat-treated compressed wood obtained in the heat treatment step, the raw wood was sandwiched between a pair of holding plates. A method for manufacturing compressed wood, wherein the wood is kept in a compressed state by being passed through a roller conveyor composed of a pair of rollers separated by a predetermined dimension in the state, and the process is shifted from the one step to another step. 2. A compression device for compressing raw wood,
A heat treatment device for heat-treating the compressed wood obtained by the compression device, and a cooling device for cooling the heat-treated compressed wood obtained by the heat treatment device are provided, and the raw wood is sandwiched between a pair of holding plates. In this state, the lumber is moved from the above-mentioned one device to another device while maintaining a compressed state of the wood by passing between a roller conveyor composed of a pair of rollers separated by a predetermined size in a state where the rollers are separated from each other. Equipment for manufacturing compressed wood. 3. The apparatus for producing compressed wood according to claim 2, wherein said heat treatment apparatus is configured to heat-treat raw wood by applying a high frequency. 4. The apparatus for manufacturing compressed wood according to claim 2, wherein the apparatus is provided upstream of the heat treatment apparatus, and the apparatus is a wood loading apparatus that sandwiches raw wood between two holding plates, and the cooling apparatus. And a take-out device which is disposed downstream of the apparatus and takes out the compressed wood cooled by the cooling device from between the two holding plates, and an empty space which is obtained by taking out the compressed wood by the take-out device. And a holding plate returning means for returning the plurality of holding plates to the wood loading device. 5. The holding plate according to claim 2, wherein the holding plate is formed of a conductive material, and a high frequency is applied to the raw wood through the holding plate. An apparatus for producing compressed wood according to the above.