JP2001071304A - Compressed wood, manufacture thereof, and method for working the compressed wood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressed wood which can be easily worked by bending or cutting in order to adapt itself to the curved faces of wood-worked furniture, household fittings and the like, and provide further a method for manufacturing the compressed wood and a method for working the compressed wood. SOLUTION: A sawn log is thermally moistened to be plasticized and the obtained plasticized wood is compressed in the longitudinal direction and is restored and stretched to an appropriate length in a natural state to obtain a compressed wood. The compressed wood is cut to the specified width and length to be joint-connected in the longitudinal direction and thus is woked as a compressed wood to meet use applications. Alternatively, the compressed wood is sliced to a specified width to obtain a veneer, which is connected by a finger joint into a specified veneer or a rolled veneer, or the veneer is lined with a reinforcing sheet to obtain a reinforced veneer or a reinforced rolled veneer which is available for various applications.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to compressed wood which can be mainly applied to curved surfaces of woodwork furniture, fittings and the like, is easily bent and cut, a method for producing the compressed wood, and processing of the compressed wood. It is about the law.

[0002]

2. Description of the Related Art Curved portions of woodwork furniture, fittings, etc. are formed by laminating a plurality of veneers obtained by slicing a natural tree to a curved shape using a laminate obtained by laminating a plurality of veneers. As it is, it is used as a curved surface portion or by attaching the thin laminate to the curved surface of the furniture surface. On the other hand, in order to obtain a more luxurious feeling, a bent wood having a curved surface formed by processing raw wood as it is has been used.

[0003]

SUMMARY OF THE INVENTION Such woodwork furniture,
The veneer laminates and bentwoods used for forming curved parts such as fittings are extremely complicated in bending and cutting because the wood itself has poor flexibility, and the processing requires time by skilled personnel. The fact is that they are forced to.

In view of the above situation, the present invention is to provide compressed wood which is easily processed mainly for forming a curved surface in woodwork furniture and fittings, a method of manufacturing the compressed wood, and a method of processing the compressed wood. Is what you do.

[0005]

In order to achieve the above-mentioned object, the invention according to the first aspect of the present invention is directed to a method of manufacturing a lumber having a predetermined cross section and a predetermined length in a longitudinal direction in a plasticized state by humidification and heating. Compressed wood characterized by having its length restored and expanded in its natural state after being compressed.

According to a second aspect of the present invention, lumber having a predetermined cross section and length is plasticized by humidifying and heating by steam, and the plasticized lumber is compressed in a longitudinal direction and compressed to a predetermined length. This is a method for producing compressed wood, characterized in that after being made into wood, it is restored and stretched to an appropriate length in a natural state.

According to a ninth aspect of the present invention, a lumber having been sawn so as to have the same width and thickness over its entire length is compressed in the longitudinal direction in a plasticized state by humidification and heating, and then restored and elongated in a natural state. The compressed wood is cut to a predetermined width and thickness, and the joint processing parts applied to the ends in the longitudinal direction are integrally connected to each other, then cut to a required length and processed to a predetermined compression wood by surface finishing. It is a method for processing compressed wood, characterized in that:

[0010] According to a tenth aspect of the present invention, the lumber, which has been sawn to have the same width and thickness over its entire length, is compressed in the longitudinal direction in a plasticized state by humidification and heating, and then restored and elongated in its natural state. The compressed wood obtained was sliced along the longitudinal direction to obtain a veneer having a predetermined thickness, and a plurality of longitudinal ends of the veneer were subjected to finger joint processing, and the finger joint processing parts were integrally connected to each other. A method for processing compressed wood, which is performed after finishing the surface and then wound up to form a roll veneer or a veneer having a predetermined length without winding up.

The invention according to claim 11 is to compress wood in the longitudinal direction in a plasticized state by humidifying and heating, and then restore and extend the length in a natural state. The compressed wood obtained is sliced along the longitudinal direction into a veneer having a predetermined thickness, and a plurality of ends in the longitudinal direction of the obtained veneer are subjected to finger joint processing, and the respective finger joint processed parts are integrally connected. Attaching a reinforcing sheet to the back of the veneer, finishing the surface, and then winding it up to make a reinforcing roll veneer,
Alternatively, it is a method for processing compressed wood, which is formed into a reinforced veneer having a predetermined length without winding.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, compressed wood,
There are no particular restrictions on the type of wood used in the method for producing compressed wood and the method for processing compressed wood, but hardwood is preferably used, and in particular, hardwood hardwood, oak, ash,
Beech, cherry, maple, walnut and the like are used.

[0011] Such wood is used in a predetermined cross section and length by sawing, that is, wood having the same width and thickness over its entire length, and is obtained by cutting both straight-grained and wood-grained wood. However, at this time, it is preferable that the large knot portion having a diameter of about 20 mm or more is hardened by avoiding this because the knot portion is hard and may hinder plasticization and compression. The cross section of both edges of the sawn wood is cut at right angles to the longitudinal direction.

The water content of the wood thus obtained is adjusted in advance, and the water content is adjusted to 20 to 25%.
It is preferable that the water content immediately after lumbering has a high water content. Therefore, the water content is reduced to about 20 to 25% by natural drying or forced drying, etc. It is desirable that the low water content is adjusted to about 20 to 25% by dipping in water or the like. In addition, the adjustment of the water content may be performed by steam introduced at the time of the next plasticization so that the water content becomes a predetermined water content simultaneously with the plasticization.

The wood whose moisture content has been adjusted is preferably kept in saturated steam (at a temperature of about 100 ° C.) for a predetermined time in a steam kettle to soften the fibrous material of the wood containing moisture and to plasticize it. can do. The time for plasticizing is not particularly limited, but the thickness of the wood is 10 mm.
About 15 to 20 minutes.

The preferred water content in the wood obtained by the above plasticization is 20 to 25%, and within the range of the water content, the next compression step can be carried out smoothly.

The compression step is to compress the plasticized wood in the longitudinal direction, that is, to fix one end in the longitudinal direction of the wood using a compression device and apply pressure from the other end, or apply pressure from both ends. At this time, compression is performed while appropriately restricting the length direction with a guide so that the material does not escape to the surroundings due to the compression.

The above-mentioned compression is to compress the plasticized wood so that its length is reduced by about 10 to 20% with respect to the entire length of the uncompressed plasticized wood. When released, the compressed wood naturally expands and recovers with time, and it is possible to obtain the compressed wood whose length with respect to the entire length before compression is reduced to about 5 to 10%.

Here, when the entire circumference of the plasticized wood is compressed by applying pressure, the whole of the obtained compressed wood becomes solid, strong and dense, and flexibility is lost. However, in the case of the above-described compression in the longitudinal direction, substantially only the fiber length direction of the wood is compressed, and the natural elongation and restoration in the longitudinal direction with the lapse of time is appropriately performed by releasing the compression. As a result, it is possible to maintain an excellent flexible function while maintaining the properties of natural wood to some extent.

In the thus obtained compressed wood, the knots and discolored portions that do not match the intended use are removed by cutting along the length direction using a saw or a guillotine, and re-cut according to the required purpose. It can be processed into lumber or sliced into veneers.

For processing into re-milled lumber, this compressed wood is cut into a predetermined width and thickness, and then the ends in the longitudinal direction are jointed and connected with an adhesive, and then cut to a required length to obtain a product. Compressed wood.

In this case, the joint at the end portion in the longitudinal direction may be either finger joint processing or scarf joint processing because the compressed wood has an appropriate thickness. Is good.

As the adhesive used for these connections, known adhesives such as urea-based, vinyl acetate-based and epoxy-based adhesives can be used. To use.

In order to process the veneer into a veneer, the compressed wood is sliced along the longitudinal direction to a predetermined thickness in the range of about 0.1 to 10.0 mm to form a veneer. The ends in the direction are finger-jointed, and a plurality of them are adhesively connected in the longitudinal direction by a finger joint, and are rolled up to form a roll veneer or a veneer having a predetermined length without winding.

Further, a reinforcing sheet selected from paper, nonwoven fabric or plastic film is attached to the back of the veneer obtained by the finger joint connection, and after finishing the surface, the roll is wound up and reinforced with the reinforcing sheet. It is a single veneer or a reinforcing veneer of a predetermined length without winding.

In the processing of a veneer by back bonding of the reinforcing sheet, a veneer having a predetermined width is formed along the longitudinal side edge by bonding to form a veneer, and the veneer is widened on the wide veneer. Such a single reinforcing sheet may be attached to the back to form a wide reinforcing veneer.

Hereinafter, the compressed wood of the present invention, a method of manufacturing the compressed wood and a method of processing the compressed wood will be described with reference to the flowchart of FIG. In manufacturing the compressed wood of the present invention, first, the raw material (log) W is cut in the sawing step 1 in the longitudinal direction to obtain a sawn product having a predetermined cross section. At that time, an unsuitable portion such as a large knot portion is cut, and the end face is cut at a right angle to the length direction.

Next, the uncompressed lumber product obtained in the water content adjusting step 2 is dried if the water content is high, and immersed in water if the water content is low, so that the water content is 20 to 25%.
Adjust so that

The lumber product whose moisture content has been adjusted is subjected to a plasticizing step 3
In the above, plasticizing is performed by exposing to steam at a temperature of about 100 ° C. for a predetermined time in a steam pot.

The plasticized lumber product is immediately transferred to the compression step 4 where it is pressed from the end in the longitudinal direction by a compression device and compressed to about 10 to 20% of its original length, that is, 90% of the total length. Compress to ~ 80% length.

The compressed wood obtained in the compression step 4 naturally expands in the restoration step 5 by leaving it to stand naturally, and has a compression ratio of about 5 to 10% of its original length, that is, a length of 95 to 90%.
Of compressed wood. At that time, if necessary, cut an inappropriate part that does not match the intended purpose and cut the target compressed wood P
W can be obtained.

The thus obtained compressed wood PW can be used as it is, but is transferred to the next process of either re-milling or single veneer according to the purpose. .

Processing for re-compressing compressed wood PW is as follows.
First, in the lumbering process 6, a square bar having a desired cross section is cut. At this time, if there is a defect that does not meet the purpose, this is cut and removed, if necessary.

Then, in joint processing 7,
Joint processing is performed on both ends in the longitudinal direction of the compressed wood PW. This joint processing is performed by finger joint processing such as cutting of a rotary blade or punching with a punch, or scarf joint processing, preferably finger joint processing.
The joint processing parts are sequentially connected by using an adhesive, and cut to a predetermined length in a cutting step 9, a surface finish is performed in a sanding step 10, and a product compressed wood PW-1 by re-sourcing is produced. What you get.

In the processing for making the compressed wood PW into a single veneer, a plurality of sliced veneers are obtained by slicing the compressed wood PW as described above to a predetermined thickness in the slicing step 11 along the longitudinal direction. Finger joint processing is performed on both ends in the longitudinal direction of these sliced veneers in processing steps 12, and then a finger joint is performed in a joint step 13 to obtain a long veneer veneer.

The long veneer thus obtained is finished in a sanding step 14 and its surface is wound up into a roll to form a roll veneer RPW-a, or rolled up in a roll shape. Instead, a reinforced veneer PW-a cut to a predetermined length is used.

The long veneer obtained by the finger joint in the joint step 13 is applied to the backing step 1
After applying a backing with paper, non-woven fabric, plastic film, etc. in 5, the surface is finished in a sanding step 16, which is wound up in a roll to form a reinforcing roll veneer RPW-
b or a reinforced veneer PW-b cut to a predetermined length without being wound up in a roll shape.

In the back-pasting step 15, a wide veneer is formed by bonding a veneer having a predetermined width along the side in the longitudinal direction, and a wide single veneer is attached to the wide veneer. The sheet may be laminated on the back to form a wide reinforcing roll veneer or a reinforcing veneer.

[0037]

The compressed wood of the present invention and the method for producing the same are obtained by compressing plasticized wood having a predetermined moisture content in the longitudinal direction by applying a predetermined pressure and appropriately restoring the material after the compression. , With compression substantially only in the fiber length direction of the wood,
Since the expansion is restored by natural return to the longitudinal direction with the lapse of time in the release of the compression, the wood can have an excellent flexible function.

In the method for processing compressed wood according to the present invention, the compressed wood is cut into a predetermined width and thickness, and joints formed at longitudinal ends are connected with an adhesive. Then, the surface is finished by cutting to obtain a predetermined compressed wood, whereby a compressed wood excellent in bending can be obtained.

Further, in another method of processing compressed wood according to the present invention, the compressed wood is sliced into veneers having a predetermined thickness along a longitudinal direction, and fingers are provided on a plurality of longitudinal ends of the veneer obtained. After applying joint processing and connecting with an adhesive and finishing the surface, it is rolled up to form a roll veneer or a veneer of a predetermined length without winding up to make a veneer made of compressed wood Obtainable.

According to still another method of processing compressed wood according to the present invention, the compressed wood is sliced into veneers having a predetermined thickness along a longitudinal direction, and finger joints are attached to longitudinal ends of the plurality of veneers obtained. After processing and connecting with an adhesive, a reinforcing sheet is adhered to the back of the veneer and wound up to form a reinforcing roll veneer, or the reinforcing veneer having a predetermined length without winding is reinforced. A veneer made of compressed wood lined with a sheet can be obtained.

[0041]

EXAMPLES Hereinafter, the compressed wood of the present invention, the method of manufacturing the compressed wood and the method of processing the compressed wood will be described more specifically with reference to examples. <Example 1> A small-knot log material having a diameter of about 300 mm and a length of about 2500 mm was selected, and this was cut into 150 pieces on one side.
It was sawn into a square section of mm. Since the moisture content of the oak wood by this sawmill was about 29%, it was dried by a drying device until the moisture content became about 21%. The dried oak material was put into a steam pot and heated in saturated steam at a temperature of 100 ° C. for about 1 hour to plasticize, thereby obtaining a plasticized oak material having a water content of about 24%.
The plasticized oak was pressed from both ends of the length using a compressed wood manufacturing apparatus while appropriately regulating the side portions, and compressed until the length became approximately 2250 mm. The wood by this compression had a side of about 150 mm and there was no significant change in the cross section, but the length was about 2400 m due to natural leaving after that.
m, and the outer peripheral surface of the compressed wood was polished with a sander to obtain smooth compressed finished wood. The thus obtained compressed wood had excellent strength by itself in the longitudinal compression, and also had good flexibility and was easy to bend.

<Example 2> The compressed wood obtained in Example 1 was cut along the longitudinal direction and re-milled into a plurality of pieces of compressed wood having a 50 mm square cross section. Part and extremely discolored part were cut. Then, both ends in the longitudinal direction of the recompressed compressed wood are cut into a finger shape using a rotary blade, and an adhesive made of vinyl acetate resin is applied to the finger-shaped cut portion to compress each other. The wood is engaged and glued and connected.
The outer peripheral surface including the connection portion was sanded and cut to a required length to obtain compressed wood by re-milling. This compressed wood was also an excellent one that was easily bent with appropriate flexibility.

<Example 3> From the compressed wood obtained in the same manner as in Example 1 above, relatively large nodes and extremely discolored portions were cut, and a normal portion was 0.5 m thick.
m and sliced into a plurality of veneers. The two ends of these veneers in the longitudinal direction are finger-processed, and an adhesive made of vinyl acetate resin is applied to the finger-processed portions and connected by engaging with each other to form a long veneer. The surface was wound up while sanding was completed to obtain a predetermined roll veneer. This roll veneer has excellent flexibility in forming a curved surface.

<Example 4> From the compressed wood obtained in the same manner as in Example 1 above, relatively large nodes and extremely discolored portions were cut, and a normal portion was 0.3 m thick.
m and sliced into a plurality of veneers. Finger processing is performed on both ends in the longitudinal direction of these veneers, and an adhesive made of vinyl acetate resin is applied to the finger processing portions and connected by meshing to form long veneers. While a polyester hot-melt adhesive film is interposed on the entire back surface of the backing, a reinforcing sheet consisting of a nonwoven fabric of polyester fiber is adhered from above, and after the adhesive is dried, the surface is sanded, and this is rolled. It was wound up to obtain a reinforcing roll veneer reinforced with a nonwoven fabric.

<Example 5> A plurality of veneers obtained by slicing a portion of normal compressed wood into a thickness of 0.3 mm in the same manner as in Example 4 were used, and along the longitudinal direction of these veneers. The edges of both sides were cut into single plates having a thickness of 0.3 mm and a width of 133 mm, and both end portions in the longitudinal direction of these single plates were finger-joined in the same manner as in Example 4, and the three single plates were side-mounted. Along the edge, they were connected with an adhesive made of the same vinyl acetate resin to form a wide long single plate having a thickness of 0.3 mm and a width of 400 mm. In this case, the finger joint portions at both ends in the longitudinal direction of the veneer were adhered so that adjacent veneers did not coincide with each other. A polyester hot-melt adhesive film is interposed over the entire back surface of the long wide veneer thus obtained, and a wide reinforcing sheet made of a 400 mm wide polyester fiber non-woven fabric is abutted from above, and heated. Then, the reinforcing sheet was integrated into a veneer, and then the surface of the veneer was sanded and wound up into a roll to obtain a reinforcing roll veneer reinforced with a nonwoven fabric. The veneers obtained in Examples 4 and 5 are as follows:
A curved surface can be formed by vacuum forming, which cannot be obtained with a conventional single plate.

[0046]

The compressed wood of the present invention and the method for producing the same are obtained by compressing plasticized wood having a predetermined moisture content by applying a predetermined pressure in the longitudinal direction and by appropriately restoring the natural wood after the compression. By configuring, it is possible to impart excellent flexibility to wood by compressing substantially only in the fiber length direction of the wood and elongation and restoration by natural return to the longitudinal direction over time by releasing this compression. Thus, wood excellent in bending can be easily obtained.

The method for processing compressed wood according to the present invention is described in claim 1.
The compressed wood is cut into a specified width and thickness, the joints applied to the ends in the longitudinal direction are connected with an adhesive, and then cut to the required length to finish the surface of the specified compressed wood. By doing so, compressed wood excellent in bending can be obtained.

According to another aspect of the present invention, there is provided a method of processing compressed wood, wherein the compressed wood of claim 1 is sliced into veneers having a predetermined thickness along a longitudinal direction, and a plurality of longitudinal end portions of the obtained veneer are obtained. After performing finger joint processing and connecting with adhesive, finishing the surface, winding it up to make a roll veneer,
Alternatively, a veneer made of compressed wood can be obtained by forming a veneer having a predetermined length without winding.

Further, according to still another method of processing compressed wood according to the present invention, the compressed wood of claim 1 is sliced along a longitudinal direction into veneers having a predetermined thickness, and a plurality of longitudinal ends of the veneer obtained are sliced. By applying finger joint processing to the part and connecting with an adhesive, attaching a reinforcing sheet to the back of the veneer and winding it up to a roll veneer, or by making it a veneer of a predetermined length without winding up The reinforcing sheet may be a reinforced veneer made of compressed wood lined with a backing.

These veneers can be used as they are or as a laminate obtained by laminating them.

Since the compressed wood and veneer obtained by the above-mentioned various processing methods are easy to bend and cut due to their excellent flexibility, special skills are required for forming curved surfaces of fittings and furniture. It can be used for many applications without need.

[Brief description of the drawings]

FIG. 1 is a process chart showing an example of the compressed wood of the present invention, a method of manufacturing the compressed wood, and a method of processing the compressed wood.

[Explanation of symbols]

 1,6 Lumbering process 2 Water content adjustment process 3 Plasticization process 4 Compression process 5 Restoration process 7,12 Joint processing process 8,13 Joint process 9 Cutting process 10,14,16 Finishing process W Material PW Compressed wood PW-1 Product compression Wood RPW-a Roll veneer PW-a Veneer RPW-b Reinforced roll veneer PW-b Reinforced veneer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B27M 1/00 B27M 1/00 AC 1/02 1/02 F term (reference) 2B002 AA11 AA12 BA01 BA05 BA10 BA19 BB05 BB06 BB10 DA04 DA06 2B200 AA07 BA01 BB15 BB20 CA12 DA04 EC18 EC19 EF11 FA24 FA31 FA34 FA37 FA44 FA46 2B230 AA30 BA01 BA03 EA19 EA21 EB05 EB06 EB13 EB23 EB26 EB28 EB29 EC10 EC24 2B242 AA11 EA11 BA24 BA11 BA24 BAA FA21 FA23 FA37 FA53 HA01

Claims (11)

[Claims] 1. Compressed wood obtained by compressing wood sawn to a predetermined cross section and length in a longitudinal direction in a plasticized state by humidification and heating, and then restoring and extending the length in a natural state. 2. Wood, which has been sawn to a predetermined cross-section and length, is plasticized by humidifying and heating with steam, and the plasticized wood is pressed in the longitudinal direction to obtain compressed wood having a predetermined length. A method for producing compressed wood, wherein the compressed wood is restored and stretched to an appropriate length in a state. 3. A method for producing compressed lumber, wherein said lumber has the same width and thickness over its entire length. 4. The sawn lumber has a water content of 20 to 2%.
The method for producing compressed wood according to claim 2, wherein the content is in the range of 5%. 5. The method for producing compressed wood according to claim 2, wherein the lumber of the sawn wood is cut at a right angle to a longitudinal direction. 6. The method for producing compressed wood according to claim 2, wherein the plasticizing of the wood is performed by appropriately regulating both sides of the wood when compressing in the longitudinal direction. 7. The method for producing compressed wood according to claim 2, wherein the compression of the wood in the longitudinal direction is performed in a range of 10 to 20% of the entire length before compression. 8. The method according to claim 2, wherein the compressed wood is restored within a range of 5 to 10% in a natural state. 9. A compressed lumber whose length and width are compressed in a longitudinal direction in a plasticized state by humidification and heating and then restored and expanded in a natural state to a predetermined width. Compressed wood characterized in that it is cut into pieces and the thickness, and the joint processed parts applied to the ends in the longitudinal direction are integrally connected to each other, and then cut to the required length and processed into predetermined compressed wood by surface finishing. Processing method. 10. After compressing the lumber having the same width and thickness over its entire length in a plasticized state by humidifying and heating, in a longitudinal direction, the compressed lumber is restored and expanded in its natural state in a longitudinal direction. After slicing along with to a veneer of a predetermined thickness, applying finger joint processing to the plurality of longitudinal ends of the obtained veneer, integrally connecting the finger joint processing parts to each other, after finishing the surface, A method for processing compressed wood, characterized in that it is rolled into a roll veneer or is formed into a veneer having a predetermined length without winding. 11. Compressed wood obtained by compressing in a longitudinal direction in a plasticized state by humidifying and heating a lumber having a width and a thickness equal to each other over its entire length, and then restoring and extending the length in a natural state. Sliced along the length of the veneer into a veneer with a predetermined thickness, finger joint processing is applied to the plurality of longitudinal ends of the obtained veneer, and the finger joint processed parts are integrally connected, and reinforced on the back surface of the veneer A method for processing compressed wood, comprising attaching a sheet and finishing the surface, and then winding the sheet into a reinforcing roll veneer, or forming a reinforcing veneer having a predetermined length without winding.