JP3375326B2 - Wood compression dewatering method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression dehydration method and apparatus for discharging free water existing in wood to the outside of the wood as a pretreatment for drying the wood.

[0002]

2. Description of the Related Art In order to use raw wood (raw wood) such as felled cedar and cypress as raw material for construction, it is necessary to dry it appropriately. To make the drying efficient, free water contained in the wood is required. A dehydration treatment for reducing the amount of is performed as a treatment before drying. As such dehydration treatment, 40 to 90
Known methods include a heat evaporation dewatering method in which wood is stored in a drying chamber heated to about ℃, a compression dewatering method in which wood is pressed by a press die or compressed between rollers.

However, the former heat dehydration method has a problem that the production efficiency is poor because it takes about 2 to 3 weeks to complete the dehydration. Moreover, only the surface layer of the wood is dehydrated and dried, and the central part of the wood cannot be dehydrated,
The free water in the wood could not be reduced uniformly, which adversely affected the strength, size and stability of the wood. Furthermore, since the wood is dried from the surface side, the shrinkage of the wood due to drying is not uniform, which easily causes dry cracks in the surface layer of the wood, reducing the number of parts that can be used as products, and in the worst case May have no commercial value.

Further, in the latter method of compression dehydration using a press die or roller, the cell membrane in the wood is destroyed, so that there is an advantage that the moisture in the wood is easily moved during the subsequent drying to facilitate the drying. On the other hand, regardless of the surface shape of the wood or the presence or absence of knots, the wood is mechanically forcibly compressed by the rigid surface of the press mold and rollers, which significantly damages the wood and causes problems such as cracking and rupture due to the internal pressure of the wood. It was easy to occur.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above point, and allows the free water of wood to be uniformly distributed in a short time without causing dry cracking or rupture of the wood. A method and apparatus for compressing and dehydrating wood, which can be reduced.

[0006]

According to a first aspect of the present invention, free water in wood is freed from the wood by pressing and compressing the outer peripheral surface of the wood by the pressure of the fluid through an elastic body in which the fluid is contained. The present invention relates to a method for compression dehydration of wood, which is characterized by squeezing.

According to a second aspect of the present invention, in the first aspect, the outer peripheral surface of the wood is surrounded by the elastic body in which the fluid is contained, and the outer peripheral surface of the wood is pressed and compressed by the pressure of the fluid through the elastic body. It is characterized by

According to a third aspect of the present invention, in the first or second aspect, the elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the elastic body portions located at both end sides of the wood are used to form the wood body. By pressing the outer peripheral surface on both ends, after releasing or reducing the pressing, the wood is pressed through the elastic body portion located near the center adjacent to the pressing releasing or reducing portion, and then releasing or reducing the pressing. By repeating the pressing through the elastic part located near the center next to that part,
It is characterized in that the outer peripheral surface of the wood is pressed in order from both ends of the wood to the central part.

According to a fourth aspect of the present invention, in the first or second aspect, the elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the elastic body portions located on both end sides of the wood are used to divide the wood body. By pressing the outer peripheral surface on both ends, after releasing or reducing the pressing, the wood is pressed through the elastic body portion located near the center adjacent to the pressing releasing or reducing portion, and then releasing or reducing the pressing. By repeating the pressing through the elastic part located near the center next to that part,
It is characterized in that the split compression for sequentially pressing the outer peripheral surface of the wood from one end portion to the center portion of the wood is set as one cycle, and the split compression is repeated for a plurality of cycles.

According to a fifth aspect of the present invention, in the first or second aspect, the elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the elastic body portions located on both end sides of the wood are used to form the wood body. By pressing the outer peripheral surface on both ends, after releasing or reducing the pressing, the wood is pressed through the elastic body portion located near the center adjacent to the pressing releasing or reducing portion, and then releasing or reducing the pressing. By repeating the pressing through the elastic part located near the center next to that part,
Split type compression from both ends that sequentially presses the outer peripheral surface of the wood from both end parts to the center part of the wood, and then the center of the wood through the elastic body parts located from the center part to both end parts of the wood in order. It is characterized in that split compression is performed from the center side by sequentially pressing the outer peripheral surface of the wood from the part to both end sides.

A sixth aspect of the present invention is characterized in that, in any one of the first to fifth aspects, the wood heated to a softening temperature is compressed.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the elastic body is arranged in or on the liquid and the wood is floated on the liquid. It is characterized in that it is moved to the position (1) and compressed through the elastic body, and when the compression is released after the free water is squeezed out, the liquid is not present around the wood and the elastic body.

According to an eighth aspect of the present invention, an elastic body capable of accommodating a fluid and surrounding the outer peripheral surface of the timber, a cylindrical main body serving as an outer frame of the elastic body, and the elastic body are connected. And a fluid control device for controlling fluid supply to the elastic body, wherein the fluid supplied to the elastic body presses and compresses the outer peripheral surface of the wood through the elastic body. It relates to a compression dehydrator.

According to a ninth aspect of the invention, in the eighth aspect, the elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the fluid can be supplied and discharged for each divided or divided portion. Is characterized by.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. 1 is a schematic sectional view of a compression dehydrator according to an embodiment of the present invention, FIG. 2 is a perspective view of one embodiment of an elastic body, FIG. 3 is a perspective view of another embodiment of the elastic body, and FIG. 5 is a perspective view of an elastic body according to the embodiment of the present invention, FIG. 5 is a schematic cross-sectional view of a compression dehydrator according to another embodiment, and FIG. 6 is a schematic view showing an example of surrounding wood with an elastic body.

The wood compression / dehydration apparatus 10 shown in FIG. 1 is used to press the outer peripheral surface W1 of a wood W made of log-shaped raw wood to squeeze out the free water in the wood W to reduce the water content. Is.

The compression dehydrator 10 has a cylindrical main body 11
, The elastic body 21, the fluid control device 31, and the pressure shield plate 3
It consists of 7. The main body 11 is longer than the wood W to be processed and has an inner diameter larger than the outer diameter of the wood W, and is made of a material such as steel that can withstand a predetermined pressure. The main body 11 may be fixed on a table (not shown) to improve stability.

As is apparent from FIG. 2, the elastic body 21 has a plurality of elastic bodies 21a, 21b, 21 in this embodiment.
c, 21d, and 21e, each of which is a floating ring-shaped hollow annular body having a central hole 22 through which the wood W is inserted, and is made of an elastic material such as rubber or urethane elastomer. This elastic body 21a ,. ． To each of the elastic bodies 21a. ． ． Fluid port 2 communicating with the inside
3 are respectively formed, and the elastic bodies 21a ,. ． ． A fluid is press-fitted into each of the elastic bodies 21a ,. ． ． The fluid inside is discharged. The center hole 22
Are elastic bodies 21a ,. ． When the filling amount of the fluid in the inside is small, or when the filling amount is not filled, it becomes larger than the outer diameter of the wood W to allow the wood W to be inserted, and when the required amount is filled, the elastic bodies 21a ,. ． ． Center hole 22 due to the expansion of
Is smaller than the outer shape of the wood W, and the inner peripheral surface of the center hole 22 is formed so as to contact the outer peripheral surface W1 of the wood W.

In this embodiment, five elastic bodies 21 are used.
a ,. ． ． To the respective elastic bodies 21a ,. ． The length of the wood W is made equal by arranging it in the main body 11 so as to be adjacent in the direction orthogonal to the diameter of the elastic body 2
The number of 1 is set appropriately according to the length of the wood W and the like. Further, the elastic body 21 may be composed of one piece instead of being composed of a plurality of pieces. However, in the case of performing division type compression in which the compression position of the wood is sequentially changed as will be described later, The elastic body 24 shown in FIG.
As shown in the figure, the inside is divided into a plurality of parts 24a, 24b, 24c, 2
4d, 24e, and fluid port 2 for each part
5 is provided and connected to the fluid control device 31 so that supply and drainage can be performed for each room. Reference numeral 26 is a central hole for inserting wood.

The elastic body 21 is not limited to the floating ring shape, but a flexible hose shape like the elastic body 27 shown in FIG. 4 is folded back along the axial direction of the wood to form the outer circumference of the wood. It may be an annular one that surrounds the surface, or a flexible hose (not shown) wound around the outer peripheral surface of wood in a coil shape.

The fluid control device 31 includes the elastic body 21 (2
4, 27) (including the case of 4 and 27) to supply the elastic body 2
The outer peripheral surface W1 of the wood is pressed and compressed via 1, 24,
Alternatively, the fluid is discharged from the elastic body 21 (24) to release or reduce the pressure, and is connected to the fluid port 23 (25) of the elastic body 21 (24) via a pipe.
The fluid control device 31 of this example includes a water tank 32 and the water tank 32.
Pump 33 for pumping the water of the main body 11, a header 34 for distributing the water pumped by the pump 33 along the length direction of the main body 11, a fluid port 23 (2) of the header 34 and the elastic body.
5) A pressure control valve 35 and a pressure gauge 36 provided between them.

The pressure shield plate 37 has the elastic member 21 (2
4) When supplying the fluid to the wood W and pressing the wood W, the outermost part of the elastic body 21 (24) located closest to both ends of the wood W is prevented from bulging outward in the length direction of the wood W and is elastic. Body 21
(24) swells toward the center in the radial direction so that the wood W can be compressed efficiently. The pressure shielding plate 37 of this example is formed of a disc having a center hole 38 formed at the center thereof, and has the outermost elastic body portion 21a (24a),
21e (24e) is fixed to the main body 11 at the outer position. The central hole 38 of the pressure shield plate 37 is used for drainage when the wood W is compressed.

Next, a method of compressing and dehydrating wood using the compression dehydrator 10 will be described. First, a wood W made of raw wood such as Japanese cedar logs is inserted into the center hole 22 (26) of the elastic body 21 (24) in the main body 11 and held in the main body 11. At that time, the wood W is set to an appropriate temperature, but if the wood W is housed in a known heating device in advance and heated to a temperature at which the wood W is appropriately softened, the wood W becomes soft and the subsequent compression becomes easy. Become. The heating temperature is set appropriately, but is, for example, about 20 to 120 ° C.

Then, the fluid is supplied to the elastic body 21 (24) by the fluid control device 31.
(24) is inflated and the outer peripheral surface W1 of the wood W is pressed through the elastic body 21 (24). As the fluid, a liquid such as water or a gas such as pressurized air is used, and a liquid such as water is preferable in terms of pressurization efficiency. By this pressing, the outer peripheral surface W1 of the wood W is compressed, the free water inside is squeezed out, and the wood W is discharged from the wood openings W2 at both ends.

The elastic body 21 (24) has elasticity,
Moreover, since the fluid is supplied to the inside, when the wood W is pressed by coming into contact with the outer peripheral surface W1 of the wood W, it is deformed according to the uneven shape of the outer peripheral surface W1 of the wood W, and the outer peripheral surface W1 of the wood is It can be pressed uniformly. Further, the elastic body 21
Since the wood W is pressed by the fluid being filled in (24), the pressing is gradually performed according to the filling speed,
Since it is not the rapid and forcible compression of the wood W such as pressing by the mold, the free water is efficiently squeezed out without destroying the wood W.

Further, as described above, the elastic body 21 is provided from the beginning.
(24) The entire outer peripheral surface W1 of the wood W may be gradually pressed by filling the entire body with a fluid, but the elastic body 21 (2
The pressure compression of the wood W may be divided and performed by sequentially supplying the fluid to each part of 4).

First, a fluid is supplied to the elastic body portions 21a (24a) and 21e (24e) located on both ends of the wood W to press and compress the outer peripheral surfaces of the wood W on both ends to free water. Squeeze out from both ends of wood W2. Next, drain the fluid from the elastic body to release the pressure or reduce the degree of pressure.
After that, the elastic body portion 21b (2
4b), 21d (24d) is supplied with fluid to press the outer peripheral side surface W1 of the wood W at that position to move the free water to the wood mouth W2 side and squeeze it out.

Next, the fluid is drained from the elastic body to release the pressure or reduce the degree of the pressure, and then the fluid is supplied to the adjacent elastic body portion 21c (24c) to the outer peripheral side surface of the central portion of the wood W. Is pressed to compress, and free water is moved to the mouth end W2 side and squeezed out. Thus, if the outer peripheral surface of the wood W is squeezed out by compressing the outer peripheral surface of the wood W in order from the ends W2 of both ends of the wood W having a short distance to the outside, the free water squeezed out later is already The free water is squeezed out so that it can easily pass through.
Drainage from can be done very smoothly. Moreover, the pressing performed near the center drains the fluid in the elastic body portions located at the portions pressed toward both ends, which are previously pressed, and is performed in a state where the pressing of the wood W is released or reduced. The passage of the water is not blocked by the pressure of the wood, and free water is not prevented from moving from the central portion of the wood W to both ends of the wood. Note that, depending on the case where the diameter of the wood W is large or depending on the tree species, the split compression from both ends from the both ends to the center may be repeatedly performed.

Further, when the wood W is pressed and compressed through the elastic body 21 (24), if the wood W is excessively compressed, the passage of the free water is crushed at the pressed portion, the movement of the free water is hindered, and the squeezing is prevented. 40% compression rate of wood W because it is hindered
It is more preferable to press the wood W in the following range. The compressibility (%) of wood is (volume before compression −
Calculated as (volume after compression) ÷ volume before compression × 100.
Since the resistance to free water movement increases as the distance to both ends of the wood increases, it is more efficient to depress the center side of the wood to be larger than the pressure on both ends of the wood. be able to. For example, the elastic body 21a (24a), 21e (24e) portion has a compression rate of 10%, and 21b (24b), 21d (24) closer to the center.
The compression rate is 20% in the part d) and 21c (24
For example, the compression rate is 30% in the c) portion.

Further, after performing the split-type compression from both ends as described above, this time the split-type from the center side in which the wood W is compressed in the opposite direction, that is, the position is sequentially changed from the central position to both ends. You may squeeze the free water of the wood W by compressing. That is, for split compression from both ends,
First, the elastic body portions 21a (24a), 21e (24
Both ends of the wood W are pressed and compressed via e), and the elastic body portion 21b (24) near the center is released after the pressing is released or reduced.
b) and 21d (24d) press and compress the central portion of the wood W, and after releasing or reducing the press, press the central portion of the wood W through the elastic portion 21c (24c) at the central position. Also, with split compression from the center side,
Next to the pressing compression at the central position in the split compression from both ends, after the pressing compression is released or reduced, the elastic body portions 21b (24b), 21d (24) at the positions next to the central part are released.
The outer peripheral surface of the wood W is pressed via the d), and after the pressing is released or reduced, the elastic body portions 21a (24a), 2 on both end sides are pressed.
The outer peripheral surfaces of both ends of the wood W are pressed and compressed via 1e (24e).

After pressing the wood W through the elastic body 21 (24), the fluid is drained from the elastic body 21 (24) to release the pressing, and the wood W may be taken out from the compression dehydrator. When the pressure is released, the wood W swells until the stress is relieved, but since the wood W is gradually compressed and dehydrated as described above, there is no possibility of causing core cracks or cracks at the knots.

Another embodiment of the compression dehydrator 10 shown in FIG.
A is for pressing and compressing the wood W from the inside position of the required length of both ends of the wood mouth W2 to the center position, so that the vicinity of the wood mouth W2 at both ends of the wood W can be projected outside and accommodated in the elastic body 21 (24). It has become. Therefore, the pressure shield plates 37A located at both ends of the elastic body 21 (24) along the length direction of the wood W have the center hole 38A whose diameter is larger than the outer diameter of the wood W. Both ends of the wood W W2
It is possible to penetrate the vicinity. Other configurations are the same as those of the compression dehydrator 10 of the above-described embodiment, and the same components are designated by the same reference numerals.

Also in the dehydration of the wood W using the compression dehydrator 10A, the same pressure compression as in the dehydrator 10 of the above embodiment is performed. At that time, the vicinity of the wood mouth W2 at both ends of the wood W protruding from the device 10A is not compressed,
Although it is finally cut and removed, the wood mouth W2 at both ends of the normal wood is often damaged at the time of felling or the like, and there is no problem since it is the part that is finally cut.

When the wood W is surrounded by an elastic material,
The wood W may be floated on a liquid such as water and inserted into the elastic body. In that case, as shown in FIG.
0 (10 A) is installed in the water tank 50. An elevating device 5 including a hydraulic cylinder, a spring and the like is provided on the bottom surface of the water tank 50 provided with a drain hole 52 which can be opened and closed by a valve 51.
5 is arranged, and the compression dehydrator 10 (1
0A) is mounted. By this elevating device 55, the vertical position of the compression dehydrator 10 (10A) is adjusted, and the position of the center hole of the elastic body 10 (10A) is adjusted to the same height as the wood W. Further, in the water tank 50, a required amount of liquid L made of water or the like for floating the wood W is stored. According to this example, the elastic body 2 in a state where the wood W is floated in the liquid is used.
1 (24), the wood W can be easily moved and damage to the surface of the wood W can be reduced. In addition, the wood W through the elastic body 10 (10A)
After squeezing the free water by compressing the
The liquid L is discharged from the
A) is raised above the liquid level so that the wood W is not soaked in the liquid, the compression is released in this state, and the wood W is taken out.

[0035]

EXAMPLES Example 1 Using the compression dehydrator 10 of FIG. 1, a diameter of 200 mm and a length of 2
000 mm cedar logs were dehydrated. At that time, two cedar logs were prepared, one was heated to room temperature (23 ° C) and the other was heated to 90 ° C. Also, the compressive stress was measured by the pressure sensor set on the core material and the relationship with the compressibility was investigated. For the compression, a fluid was supplied to the entire elastic body 21 to gradually press and compress the entire wood. The results are shown in Table 1.

[0036]

[Table 1]

As is clear from Table 1, wood can be efficiently compressed. The pressure required for compression is 0.
5 MPa to 6 MPa, preferably 1.5 MPa to
It is 2.5 MPa. In addition, wood heated to 90 ℃,
It can be seen that it can be compressed at about half the pressure compared to normal temperature.

Example 2 For cedar logs having a diameter of 195 mm and a length of 500 mm, as shown in FIG.
Dehydration treatment was performed using the compression dehydrator. Pressing and compressing the wood is performed by pouring water over the entire elastic body 21 to gradually press the entire outer peripheral surface of the wood, 2 minutes for pouring water, 3 minutes for holding pressure to stop the pouring and maintaining the pressurized state, and the elastic body. The pressure was released for 2 minutes by the drainage from 1 cycle, and 5 cycles were repeated to measure the change in water content. The compressed water weight is the water weight of the wood squeezed out by compression, and was measured by receiving the water content of the wood flowing out from both ends of the wood in a container. The water content was measured by the dry method. The results are shown in Table 2.
Although the wood swelled until the stress was relieved by releasing the pressure after the dehydration treatment, there was no damage such as core cracks or cracks at the nodes. Furthermore, a slight compressive deformation remained in the surface layer of the wood in the shape of a fold, but the compressive deformation acts to relieve the tension of the wood surface layer by recovering the shape during the subsequent drying treatment, The effect of preventing drying shrinkage cracks was produced, and cracks did not occur even after artificial drying. Therefore, the drying yield and quality were improved.

[0039]

[Table 2]

As is clear from the results shown in Table 2, when the compressibility exceeds 43%, the decrease in water content is small. It is considered that this is because when the compressibility exceeds 40%, the passage of free water flowing in the wood is crushed and the movement of free water is hindered. Also, the water content of raw wood is usually 120.
There is a range from about 100% to about 200%, and there are variations due to individual differences. However, in the second embodiment, the compression rate is 2
By setting 2.2% to 43.0%, the water content is 72% to
It could be adjusted between 47%. Moreover, although not shown in Table 2, the water content of the sapwood portion after dehydration treatment is 40%, and the water content of the core material portion is 42.9%, and the water content is almost uniform in the whole wood. It was

Example 3 A cedar log having a diameter of 195 mm and a length of 500 mm was subjected to the same treatment as in Example 2 four times as one cycle.
The water content was adjusted. The results are shown in Table 3. In this example, by setting the compressibility to 21.2%, the water content of the whole wood is 72%.
It was possible to make it to%.

[0042]

[Table 3]

Comparative Example 1 Cryptomeria logs having a diameter of 195 mm and a length of 500 mm were compressed using a 4-direction flat press to dehydrate free water. The wood (log) was compressed into a quadrangle by this treatment, and annual ring peeling occurred at the four corners. Moreover,
The knot was pushed to the center of the material, and a significant crack occurred in the adjacent part.

Comparative Example 2 A cedar log having a diameter of 195 mm and a length of 500 mm was compressed to a compression rate of 33% using a 4-direction flat press to dehydrate free water. Then, the moisture content is about 1 by hot air drying.
It was artificially dried to 5%. As a result, cracks occurred on the material surface.

[0045]

As shown and described above, according to the method for compressing and dehydrating wood according to the invention of claim 1, since the outer peripheral surface of the wood is pressed and compressed through the elastic body to which the fluid is supplied,
The wood can be compressed gradually and following the surface irregularities of the wood, and free water in the wood can be squeezed out without applying a large load to the wood at once, so stress relaxation after pressure compression is released. The wood that swells until it does not have any damage such as core cracks or cracks in the knots. Moreover, a slight compressive deformation remains on the surface layer of the dehydrated wood in a fold shape, but the compressive deformation acts to relieve the tension on the surface of the wood by recovering the shape during the subsequent drying process. Since it has an effect of preventing drying shrinkage cracking, cracking can be prevented even by artificial drying, and the yield of drying and the quality of wood can be improved.
In addition to these, since the water content of wood can be easily changed by changing the compression rate, there is also an advantage that dehydration treatment can be performed according to the application of the wood and the like.

Further, in the invention according to claim 1, the free water of wood is discharged from the wood in the state of water, so that the energy required for evaporation can be saved as compared with the conventional method which mainly uses evaporation. Economical with little energy.

According to the second aspect of the present invention, the outer peripheral surface of the wood is surrounded by the elastic body, and the outer peripheral surface of the wood is compressed by the fluid contained in the elastic body. Moreover, free water can be squeezed out by compression without damaging it.

According to the invention of claim 3, claim 1
In addition to the effect of the invention described above, since the compression of the wood through the elastic body is performed sequentially from the wood both ends to the center, when compressing the wood central part where free water is hard to be discharged, the free ends of both ends close to the outside The water is dehydrated so that the free water can easily pass to both ends of the wood, so that the free water can be efficiently dehydrated.

Further, according to the invention of claim 4, since the split compression from both ends to the center is repeated in the invention of claim 3, free water is efficiently dehydrated even in long wood, and the water content is increased. Can be reduced.

Further, according to the invention of claim 5, since the split compression from the both ends to the center side in the invention of claim 3 is performed, the split compression from the center side to both ends is performed. As in the case of the invention of 1, the free water can be efficiently dehydrated from long wood. Further, according to the invention of claim 6, since the compression and compression are performed on the appropriately softened wood through the elastic body, the compression is facilitated and the free water can be dehydrated more efficiently.

Further, according to the invention of claim 7, since the wood is floated in the liquid and moved to the position of the elastic body, the work of moving the wood is facilitated and the outer peripheral surface of the wood is less likely to be damaged.

According to the compression dewatering device of the eighth aspect of the present invention, dewatering treatment of wood can be easily performed. Moreover, because of the simple structure, it can be installed near the logging site to dehydrate the wood, and because the moisture content decreases, the wood can be made lighter and transported, thus improving transport efficiency. it can.

Further, according to the compression dehydrator of the ninth aspect of the present invention, it is possible to compress the wood by dividing it in the axial direction of the wood, so that the wood can be dehydrated more efficiently. Moreover, since the device has a simple structure, it is inexpensive.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a compression dehydrator according to one embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of an elastic body.

FIG. 3 is a perspective view of another embodiment of the elastic body.

FIG. 4 is a perspective view of an elastic body according to still another embodiment.

FIG. 5 is a schematic sectional view of a compression dehydrator according to another embodiment.

FIG. 6 is a schematic view showing an example in which wood is surrounded by an elastic body.

[Explanation of symbols]

10, 10A Compression dehydrator 21, 24 Elastic body 21a, 21b, 21c, 21d, 21e Divided elastic body portion 24a, 24b, 24c, 24d, 24e Partitioned elastic body portion 31 Fluid control device W Wood

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiko Takeuchi 20 Inoue-cho, Iwakura-shi, Aichi 20 Mitan Co., Ltd. Incorporated (72) Inventor Yoshinori Kobayashi 11-13 Suehiro-cho, Noshiro-shi, Akita (56) Reference JP 2000-227276 (JP, A) JP 10-138202 (JP, A) JP 11-63824 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B27K 5/00 F26B 5/14

Claims (9)

(57) [Claims] 1. A method for compressing and dehydrating wood, characterized in that free water in the wood is squeezed out from the wood by pressing and compressing the outer peripheral surface of the wood with the pressure of the fluid through an elastic body in which the fluid is contained. . 2. The elastic body in which the fluid is contained surrounds the outer peripheral surface of the wood, and the outer peripheral surface of the wood is pressed and compressed by the pressure of the fluid through the elastic body. For dewatering compressed wood. 3. An elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the outer peripheral surfaces of both ends of the wood are pressed through the elastic body portions located on both end sides of the wood, and the pressing After releasing or reducing the pressure, the wood is pressed through the elastic body portion adjacent to the center adjacent to the pressure release or reduction portion, and then the release or reduction of the pressure and the elastic body located near the center adjacent to the portion. The method for compressing and dewatering wood according to claim 1 or 2, wherein the outer peripheral surface of the wood is pressed in order from both end portions to the central portion of the wood by repeating the pressing through the portions. 4. The elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the outer peripheral surfaces of the both ends of the wood are pressed through the elastic body portions located on both end sides of the wood, and the pressing After releasing or reducing the pressure, the wood is pressed through the elastic body portion adjacent to the center adjacent to the pressure release or reduction portion, and then the release or reduction of the pressure and the elastic body located near the center adjacent to the portion. The division type compression for sequentially pressing the outer peripheral surface of the wood from both end portions to the central portion of the wood by repeating the pressing with the portion is defined as one cycle, and the division compression is repeated for a plurality of cycles. Alternatively, the method for compressing and dehydrating wood as described in 2 or 3. 5. The elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the outer peripheral surfaces on both end sides of the wood are pressed through the elastic body parts located on both end sides of the wood, and the pressing After releasing or reducing the pressure, the wood is pressed through the elastic body portion adjacent to the center adjacent to the pressure release or reduction portion, and then the release or reduction of the pressure and the elastic body located near the center adjacent to the portion. By repeating pressing with a part, split type compression from both end sides that sequentially press the outer peripheral surface of the wood from both end side parts to the central part of the wood,
Next, split type compression from the center side is performed by sequentially pressing the outer peripheral surface of the wood from the center part of the wood to both end sides through elastic body parts located from the center part of the wood to both end sides in order. The method for compressing and dehydrating wood according to claim 1 or 2. 6. The method of compressing and dewatering wood according to claim 1, wherein the wood heated to a softening temperature is compressed. 7. An elastic body is placed in or on a liquid, and the wood is floated on the liquid, and the wood on the liquid is moved to the position of the elastic body to perform compression via the elastic body. The method for compressing and dehydrating wood according to claim 1, wherein a liquid is not present around the wood and the elastic body when the compression is released after the water is squeezed out. 8. An elastic body capable of accommodating a fluid so as to surround the outer peripheral surface of wood, a cylindrical main body serving as an outer frame of the elastic body, and an elastic body connected to the elastic body. And a fluid control device for controlling the fluid supply of the wood, wherein the fluid supplied to the elastic body presses and compresses the outer peripheral surface of the wood through the elastic body. 9. The method according to claim 8, wherein the elastic body is divided or divided into a plurality of pieces along the axial direction of the wood, and the fluid can be supplied and discharged for each divided or divided portion. Compressed and dehydrated equipment for timber.