JPH1095003A - Method of dimensional stabilization of woody material - Google Patents
Method of dimensional stabilization of woody materialInfo
- Publication number
- JPH1095003A JPH1095003A JP25035596A JP25035596A JPH1095003A JP H1095003 A JPH1095003 A JP H1095003A JP 25035596 A JP25035596 A JP 25035596A JP 25035596 A JP25035596 A JP 25035596A JP H1095003 A JPH1095003 A JP H1095003A
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- Prior art keywords
- pressure
- sealed space
- pressure steam
- wood
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は木質材の寸法安定化
処理方法に関し、特に、木質材の内部に高圧水蒸気を供
給することにより木質材の寸法安定性を向上させるよう
にした木質材の処理方法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dimensional stabilization of a wooden material, and more particularly to a method for processing a wooden material in which high-pressure steam is supplied into the wooden material to improve the dimensional stability of the wooden material. Method improvement.
【０００２】[0002]
【従来の技術】木材は水分の吸放出により膨潤又は収縮
する。このことは無垢の挽き板、木材薄板（厚さ０．２
ｍｍ〜１０ｍｍ程度）やパーチクルボード、ＭＤＦ、Ｏ
ＳＢ、合板等でも同様である。建築用あるいは家具用材
料として木質材を用いる場合には、環境により木質材が
膨潤又は収縮することは好ましくなく、環境に左右され
ない寸法安定性を持つことが望まれる。2. Description of the Related Art Wood swells or shrinks due to the absorption and release of moisture. This means solid sawn board, thin wood (thickness 0.2
mm to 10 mm), particle board, MDF, O
The same applies to SB, plywood and the like. When a wooden material is used as a material for construction or furniture, it is not preferable that the wooden material swells or shrinks depending on the environment, and it is desired that the wooden material has dimensional stability that is not affected by the environment.
【０００３】そのための対策として、プレス盤で木質材
を上下に挟持してオートクレーブ内に入れ、高圧水蒸気
で数分間処理して木質材の寸法安定化を図る方法等が行
われている。しかし、この方法は設備が大がかりである
ことに加え、木質材内部（中央部）への高圧水蒸気の浸
透が難しく、木質材の中央部と周辺部での処理状態が異
なる場合が生じる。[0003] As a countermeasure, a method has been used in which a wooden material is sandwiched up and down by a press machine, placed in an autoclave, and treated with high-pressure steam for several minutes to stabilize the dimensions of the wooden material. However, in this method, in addition to the large-scale equipment, it is difficult to infiltrate the high-pressure steam into the wood material (central portion), and the treatment state in the central portion and the peripheral portion of the wood material may be different.
【０００４】本出願人は、その不都合を解消すべく、従
来の木材処理で用いられる熱盤を持つ平盤プレスの熱盤
間に、自然乾燥状態にある木質材を配置し、その周囲に
弾性シリコン材等の弾性密封材料を配置して密封状態と
した後、上下の熱盤に設けた蒸気供給孔から高圧水蒸気
を供与して、木質材に含まれる水分を水蒸気化させ、木
質材の寸法安定化を図る方法を提案した（特開平６−２
３８６１６号公報）。この処理方法は、通常の熱盤を持
つ平盤プレスを用いて木質材の寸法安定化処理を行うこ
とから、処理が簡素化される利点がある。また、この処
理において、本発明者らの実験によれば、約１５０℃〜
２３０℃に近い温度の高圧水蒸気（飽和水蒸気又は過熱
水蒸気）を密封空間内に供給し、木質材を約１８０℃〜
２００℃に近い温度まで昇温させて、木質材の含水率分
の水分を水蒸気化させることにより有効に処理が進行す
ることを経験している。[0004] In order to solve the inconvenience, the present applicant arranges a wood material in a naturally dry state between hot plates of a flat plate press having a hot plate used in conventional wood processing, and elastically surrounds the wood material. After placing an elastic sealing material such as silicon material into a sealed state, high-pressure steam is provided from steam supply holes provided in the upper and lower heating plates to convert the water contained in the wood into steam, and to measure the size of the wood. A method for stabilization was proposed (Japanese Patent Laid-Open No. 6-2).
38616). This processing method has an advantage that the processing is simplified since the dimensional stabilization processing of the wooden material is performed using a flat press having a normal hot plate. Also, in this treatment, according to the experiments of the present inventors, the temperature was about 150 ° C.
High-pressure steam (saturated steam or superheated steam) at a temperature close to 230 ° C is supplied into the sealed space, and the wood is reduced to approximately 180 ° C or higher.
By increasing the temperature to a temperature close to 200 ° C. and converting the water content corresponding to the water content of the wood material into steam, the user has experienced that the treatment effectively proceeds.
【０００５】上記した高圧水蒸気による木質材の寸法安
定化処理は、木質材に高い寸法安定性をもたらすと共
に、フェノールやホルマリンのような薬剤を使わず、処
理後も薬剤が残らないクリーンな処理方法であることか
らも有用なものである。[0005] The above-mentioned dimensional stabilization treatment of wood using high-pressure steam provides a high dimensional stability to the wood, and uses no chemicals such as phenol or formalin, and a clean treatment method in which the chemical does not remain even after the treatment. This is also useful because
【０００６】本発明者らは、一層均質に安定化処理が施
された木質材を得るべくさらに研究を行い、寸法安定化
処理に際して、木質材を収容した密封空間内を減圧し、
そこに高圧水蒸気を導入することが有効であることを知
覚し、それに基づき、さらに改良された木質材の寸法安
定化処理方法を提案している（特願平８−４５１７３
号）。この方法を取ることにより、高圧水蒸気が木質材
内部にまで確実に透過しかつ均一に供給され、処理木質
材に一層均質でかつ高い寸法安定性を付与することがで
きることを確認した。[0006] The present inventors have further studied to obtain a more homogeneously stabilized wood material. In the dimensional stabilization process, the interior of the sealed space containing the wood material was depressurized.
He perceived that the introduction of high-pressure steam was effective there, and based on that, proposed a further improved dimensional stabilization method for wood materials (Japanese Patent Application No. 8-45173).
issue). By adopting this method, it was confirmed that high-pressure steam was surely permeated into the wood material and was supplied uniformly, and that the treated wood material could be given more uniform and high dimensional stability.
【０００７】さらに、これまでの木質材の高圧水蒸気処
理では、常温、常態にある木質材、すなわち、含水率が
低くても７％〜１０％程度であり、温度が１５℃〜２５
℃程度である自然乾燥状態にある木質材をそのまま熱盤
プレス間等に形成された密封空間に配置して処理を行う
ようにしており、当該木質材に含まれる水分が水蒸気化
する温度までに木質材を昇温させ、かつ、高い含水率の
水分を高圧水蒸気化するのに、前記のように約１５０℃
〜２３０℃程度の高圧水蒸気の持つエネルギーを主とし
て使用しており、この高圧水蒸気の製造に高い製造コス
トを必要としていること、また、木質材の昇温に長い時
間を要していることに着目し、それを解消するものとし
て、処理すべき木質材に対して別途用意した乾燥施設に
より加熱乾燥処理を施し、自然乾燥状態による含水率よ
り低い含水率とし、該加熱乾燥処理が施された木質材を
密封空間内に収容し、該密封空間内に高圧水蒸気を供給
することにより該木質材に寸法安定化処理を施すように
した方法も提案している（特願平８−１９２４２６号参
照）。Further, in the conventional high-pressure steam treatment of wood materials, the wood materials are at room temperature and in a normal state, that is, the water content is about 7% to 10% even at a low temperature, and the temperature is 15 ° C. to 25%.
The natural wood in the natural dry state of about ℃ is placed in a sealed space formed between hot platens and the like as it is to perform the treatment, by the temperature at which the moisture contained in the wood becomes water vapor. In order to raise the temperature of the wood material and convert high-moisture-content water into high-pressure steam, as described above, at about 150 ° C.
Focuses on the fact that the energy of high-pressure steam of about 230 ° C is mainly used, and that the production of this high-pressure steam requires high production costs, and that the temperature of the wood material takes a long time to rise. In order to solve the problem, the wood material to be treated is subjected to a heat drying treatment by a drying facility separately prepared to a moisture content lower than the moisture content in the natural drying state, and the wood material subjected to the heat drying treatment is performed. There has also been proposed a method in which wood is accommodated in a sealed space, and high-pressure steam is supplied into the sealed space to perform a dimensional stabilization treatment on the wood material (see Japanese Patent Application No. 8-192426). .
【０００８】この処理方法によれば、従来法に比較し
て、短い高圧水蒸気処理時間で従来品と同等の処理効果
を上げることができ、高圧水蒸気の製造にかかるコスト
を低減でき、処理単価を下げることが可能となる。According to this processing method, compared with the conventional method, the processing effect equivalent to that of the conventional product can be achieved with a shorter high-pressure steam processing time, the cost for producing high-pressure steam can be reduced, and the processing unit price can be reduced. It is possible to lower it.
【０００９】[0009]
【発明が解決しようとする課題】すでに提案している上
記の方法は、エネルギーコストの低減に資するものであ
り有効なものであるが、前記のように、処理すべき木質
材に対して予め加熱乾燥処理を施すことを必要とし、そ
のために乾燥施設を別途用意する必要がある。また、乾
燥済みの木質材を乾燥施設から高圧水蒸気処理施設へ移
動する必要であり、移動の手間と共に一時保管場所等も
必要となる。The above-mentioned method, which has already been proposed, contributes to the reduction of energy costs and is effective. However, as described above, the wood material to be treated is heated in advance. It is necessary to perform a drying process, and therefore, a drying facility needs to be separately prepared. In addition, it is necessary to transfer the dried wood material from the drying facility to the high-pressure steam treatment facility, and a temporary storage place and the like are required along with the trouble of the movement.
【００１０】そのような設備的また場所的制約を受ける
ことを配慮しつつ、木質材の高圧水蒸気処理についてさ
らに研究と実験を継続する過程において、自然乾燥状態
の木質材を高圧水蒸気処理施設の密封空間内に置き、そ
こで、高圧水蒸気導入と圧解放とを１サイクルとする処
理を同じ密封空間内において複数回繰り返すことによ
り、木質材を予備加熱乾燥しなくても、短い処理時間で
予備加熱乾燥をした場合と同等の処理効果を上げること
ができることを知覚した。[0010] In the course of continuing research and experiments on high-pressure steam treatment of wood while taking into account such restrictions on facilities and locations, in the process of continuing research and experiments on wood, naturally dry wood is sealed in a high-pressure steam treatment facility. It is placed in a space, where the process of introducing and releasing the high-pressure steam as one cycle is repeated several times in the same sealed space, so that preheating and drying can be performed in a short processing time without preheating and drying the wood material. It was perceived that the same processing effect as in the case of performing can be achieved.
【００１１】本発明の木質材の寸法安定化処理方法は、
上記知覚に基づくものであり、基本的に、木質材を密封
空間内に収容し、該密封空間内への高圧水蒸気の導入及
び該密封空間内の圧解放とからなるサイクルを、同じ密
封空間内において連続して、少なくとも２回以上繰り返
すことにより該木質材の寸法安定化を図ることを特徴と
する。[0011] The method for stabilizing the size of a wooden material according to the present invention comprises:
Based on the above perception, basically, a wooden material is housed in a sealed space, and a cycle consisting of introduction of high-pressure steam into the sealed space and pressure release in the sealed space is performed in the same sealed space. Is characterized in that dimensional stabilization of the wood material is achieved by repeating continuously at least twice or more.
【００１２】本発明において、処理すべき木質材に特に
制限はなく、単板等の無垢材や合板だけでなく、中質繊
維板（ＭＤＦ）、配向性ボード（ＯＳＢ）やパーチクル
ボード（ＰＢ）等の木質加工材料も処理可能である。木
質加工材料の場合に、プレス盤により加圧圧縮を施しな
がら本発明の処理を行なうことは、圧密化処理と共に寸
法安定化を処理を行うことができることから、特に有効
である。また、本発明において用いる処理木質材は自然
乾燥状態のものであってよく、特別の加熱乾燥施設によ
る予備乾燥処理は必要としない。In the present invention, the wood material to be treated is not particularly limited, and includes not only solid wood such as veneer and plywood, but also medium fiber board (MDF), oriented board (OSB) and particle board (PB). Wood processed materials can also be processed. In the case of a woody material, it is particularly effective to carry out the treatment of the present invention while applying pressure and compression with a press machine, since the dimensional stabilization can be carried out together with the consolidation treatment. The treated wood used in the present invention may be in a naturally dried state, and does not require a preliminary drying treatment by a special heat drying facility.
【００１３】前記木質材は密封空間内に収容される。該
密封空間は、高圧水蒸気の導入と圧解放が可能であり、
また、好ましくは密封空間内の減圧が可能であることを
条件に、従来用いられている木質材処理用の耐圧型圧力
容器による密封空間であってもよく、木質材の圧締や複
合材の製造に従来用いられる平盤プレスに装着されるプ
レス盤の間に形成される密封空間であってもよい。The wood material is accommodated in a sealed space. The sealed space is capable of introducing and releasing pressure of high-pressure steam,
In addition, preferably, provided that the pressure in the sealed space can be reduced, a sealed space using a conventionally used pressure-resistant pressure vessel for processing wood materials may be used. It may be a sealed space formed between press plates mounted on a flat plate press conventionally used for manufacturing.
【００１４】密封空間内の減圧が可能である場合には、
好ましくは、第１回目の高圧水蒸気の導入に先立って、
密封空間内の減圧を行う。本発明者らの実験によれば、
予め減圧された空間内に高圧水蒸気の導入することによ
り、圧解放後の木質材の含水率低下は促進され、かつ、
木質材の中央部まで寸法安定化処理が均一に施されるこ
とを確認した。減圧は７００ｍｍＨｇ〜７５０ｍｍＨｇ
程度が好ましく、本発明者らの実験によれば、７５０ｍ
ｍＨｇ程度の減圧で十分な効果が得られた。なお、この
減圧は、各サイクルでの高圧水蒸気導入に先立って行う
ようにしてもよく、その場合には、より少ない高圧水蒸
気供給量で（すなわち、より短い高圧水蒸気処理時間
で）処理効果が期待できる利点がある。When it is possible to reduce the pressure in the sealed space,
Preferably, prior to the first introduction of high pressure steam,
Reduce the pressure in the sealed space. According to our experiments,
By introducing high-pressure steam into the space that has been depressurized in advance, reduction in the water content of the wood material after pressure release is promoted, and
It was confirmed that the dimensional stabilization treatment was uniformly applied to the center of the wood. Decompression is 700mmHg ~ 750mmHg
Is preferable, and according to the experiments of the present inventors, 750 m
A sufficient effect was obtained at a reduced pressure of about mHg. The pressure reduction may be performed prior to the introduction of the high-pressure steam in each cycle, in which case the processing effect can be expected with a smaller supply of the high-pressure steam (that is, with a shorter high-pressure steam processing time). There are advantages that can be done.
【００１５】前記耐圧型圧力容器又はプレス盤は、熱源
を有するもの、有しないものいずれであってもよいが、
熱源を有するものが特に推奨される。熱源としては、耐
圧型圧力容器あるいはプレス盤に組み込まれたヒーター
あるいはバンドヒーター等の電気的加熱手段、加熱蒸
気、マイクロウェーブを含む高周波加熱、等任意であ
り、該熱源によって予め昇温状態とされた密封空間内に
木質材を収容する。昇温温度は、好ましくは、高圧水蒸
気による寸法安定化処理が木質材において進行する温度
範囲（１８０℃〜２００℃程度）である。The pressure-resistant pressure vessel or the press plate may or may not have a heat source.
Those with a heat source are particularly recommended. The heat source may be any of electric heating means such as a heater or a band heater incorporated in a pressure-resistant pressure vessel or a press platen, heated steam, high-frequency heating including microwaves, and the like. Wood material is housed in a closed space. The temperature raising temperature is preferably within a temperature range (about 180 ° C. to 200 ° C.) in which the dimensional stabilization treatment with high-pressure steam proceeds in the wooden material.
【００１６】木質材を収容した密封空間内に好ましくは
１５０℃〜２３０℃程度の飽和水蒸気又は過熱水蒸気
（飽和水蒸気より高い温度の水蒸気）である高圧水蒸気
を導入する。高圧水蒸気の圧力は、処理すべき木質材の
種類等によって相違するが、数ｋｇｆ／ｃｍ2 〜３０ｋ
ｇｆ／ｃｍ2 であってよい。High-pressure steam, which is preferably saturated steam or superheated steam (steam having a higher temperature than saturated steam) at about 150 ° C. to 230 ° C., is introduced into the sealed space containing the wood material. The pressure of the high-pressure steam varies depending on the type of wood material to be treated and the like, but is several kgf / cm 2 to 30 kF.
gf / cm 2 .
【００１７】密封空間への高圧水蒸気の供給及び必要な
場合の前記密封空間内の減圧の方法は任意であるが、例
えば、密封空間がプレス盤の間に形成され、かつ、プレ
ス盤が外部に連通する多数の細孔を有するものである場
合には、一方のプレス盤の該細孔を従来公知の高圧水蒸
気発生源に適宜の配管及び弁手段等を介して接続し、他
方のプレス盤の細孔を従来公知の好ましくは耐熱性の真
空ポンプあるいは吸引ブロアー等の真空引き源にやはり
適宜の配管及び弁手段等を介して接続することにより可
能である。The method of supplying high-pressure steam to the sealed space and depressurizing the sealed space when necessary is optional. For example, the sealed space is formed between press plates, and the press plate is connected to the outside. In the case of having a large number of communicating pores, the pores of one press plate are connected to a conventionally known high-pressure steam generation source through appropriate piping and valve means, and the other press plate. It is also possible to connect the pores to a vacuum source such as a conventionally known and preferably heat-resistant vacuum pump or suction blower via appropriate piping and valve means.
【００１８】高圧水蒸気の供給及び減圧の他の方法とし
て、上下のプレス盤と木質材との間に、多数の細孔を有
しかつ耐圧性、耐熱性を有する別部材を配置して行なう
ようにしてもよい。その場合には、一方の前記別部材を
高圧水蒸気発生源に接続し、他方の前記別部材を真空引
き源に接続する。それにより、前記別部材の細孔を介し
て木質材に高圧水蒸気の供給し、かつ真空引きすること
が可能となる。この種の別部材の好ましい態様は処理す
べき木質材を収容できる内部空間を持つ箱状部材と該内
部空間を密閉する蓋部材とから構成される。As another method for supplying high-pressure steam and reducing pressure, another member having a large number of pores and having pressure resistance and heat resistance is arranged between upper and lower press plates and a wood material. It may be. In this case, one of the other members is connected to a high-pressure steam generation source, and the other is connected to a vacuum source. This makes it possible to supply high-pressure steam to the wood material through the pores of the separate member and to evacuate the wood material. A preferred embodiment of this kind of separate member comprises a box-shaped member having an internal space capable of accommodating a wood material to be treated, and a lid member for sealing the internal space.
【００１９】密封空間内の減圧を行う場合には、噴出す
る高圧水蒸気は、噴出力に加えて吸引力の作用を受け、
運動エネルギーが増大する。それにより、従来法よりも
短時間で木質材の内部にまで確実に透過し、かつ等しく
かつ均一に行き渡る。その結果、寸法安定化処理が速や
かにかつ全域にわたり迅速に進行する。When depressurizing the enclosed space, the high-pressure steam that is jetted is subjected to the action of suction force in addition to the jet power,
Kinetic energy increases. As a result, the permeation can be reliably transmitted to the interior of the wood material in a shorter time than in the conventional method, and can be evenly and uniformly distributed. As a result, the dimensional stabilization process proceeds promptly and quickly over the entire area.
【００２０】第１サイクルの高圧水蒸気導入を所要時間
行った後、密封空間内の圧解放を行う。高圧水蒸気導入
時間は、高圧水蒸気による寸法安定化処理が進行する温
度（１８０℃〜２００℃程度）にまで当該木質材が昇温
するまでは少なくとも継続して行うことが好ましい。圧
解放は所定の温度に昇温した後に直ちに行ってもよく、
高圧水蒸気の導入を停止してしばらく放置した後に行う
ようにしてもよい。After the introduction of the high-pressure steam in the first cycle for a required time, the pressure in the sealed space is released. The high-pressure steam introduction time is preferably performed at least continuously until the temperature of the wood material rises to a temperature (about 180 ° C. to 200 ° C.) at which the dimensional stabilization treatment with high-pressure steam proceeds. The pressure release may be performed immediately after the temperature is raised to a predetermined temperature,
It may be performed after the introduction of the high-pressure steam is stopped and left for a while.
【００２１】圧解放後、直ちに、又は１分〜２分間程度
の放置して解圧バルブを締めた後、再び、第１サイクル
目と同じ処理を同じ密封空間において繰り返す。その際
に、第２サイクル目以降においても、「密封空間内の減
圧」処理は任意であり、行う場合には高圧水蒸気処理時
間を短くできる利点がある。また、第２サイクル目以降
での「密封空間内への高圧水蒸気の導入」処理時間は第
１サイクル目でのそれよりも長い時間とすることが好ま
しい。それは、本発明者の実験によれば、第１サイクル
目（あるいは、３サイクル以上行う場合での初期段階で
の数回のサイクル）は、高含水率かつ常温の木質材が密
封空間内で加圧条件下で１８０℃〜２００℃程度までの
昇温を受け、次の圧解放により、供給された水蒸気と共
に木質材内部の水分も外部に放出されてその含水率を３
％程度にまで低下させる段階であり、木質材の昇温には
長い時間を必要としないことによる。また、含水率が低
下した後に木質材に対して従来と同様の高圧水蒸気処理
が施す場合に、比較的長時間に亘って、連続して高温高
圧条件におくことが効果的であることを知覚したことに
よる。Immediately after the pressure is released, or after leaving it for about 1 to 2 minutes to close the decompression valve, the same processing as in the first cycle is repeated again in the same sealed space. At that time, even in the second cycle and thereafter, the "decompression in the sealed space" treatment is optional, and when it is performed, there is an advantage that the high-pressure steam treatment time can be shortened. Further, it is preferable that the processing time of the “introduction of high-pressure steam into the sealed space” in the second cycle and thereafter is longer than that in the first cycle. According to the experiment of the present inventor, in the first cycle (or several cycles in the initial stage when three or more cycles are performed), a wood material having a high water content and a normal temperature is added in the enclosed space. Under the pressure condition, the temperature is raised to about 180 ° C. to 200 ° C., and the next release of the pressure releases the water inside the wood material together with the supplied water vapor to reduce the water content to 3%.
% Because the temperature of the wood material does not require a long time. In addition, when the wood material is subjected to the same high-pressure steam treatment as before after the water content is reduced, it is perceived that the continuous high-temperature and high-pressure condition for a relatively long time is effective. It depends.
【００２２】前記のようにして処理サイクルを繰り返
し、所要の寸法安定化処理が達成された時点で処理を終
了し、密封空間から処理済み木質材を取り出す。本発明
者らの実験によれば、上記の方法により処理された木質
材は、無処理のものと比較して高い寸法安定性が得ら
れ、前記サイクルを繰り返さないで処理したものと比較
してより短い処理時間で同程度の寸法安定性が得られ、
また、予め含水率を低下させた木質材を用いて処理する
場合と比較して、同程度の高圧水蒸気処理時間でありな
がら同程度の寸法安定性が得られた。The processing cycle is repeated as described above, and when the required dimensional stabilization processing is achieved, the processing is terminated, and the processed wood material is taken out of the sealed space. According to the experiments of the present inventors, wood materials treated by the above method have higher dimensional stability than untreated wood materials, and compared to those treated without repeating the cycle. The same dimensional stability can be obtained in shorter processing time,
In addition, as compared with the case where the wood material whose moisture content was reduced in advance was used, the same dimensional stability was obtained despite the same high-pressure steam treatment time.
【００２３】本発明の方法により上記のような効果が得
られる理由は必ずしも明らかでないが、（必要に応じて
行う減圧）→高圧水蒸気導入→圧解放、を１サイクルと
する処理を複数回繰り返すことは、木質材に対して、高
圧水蒸気の過度の流動と圧の上下変動を反復して与える
こととなり、そのために、処理すべき木質材の木質エレ
メント中の壁孔が破壊されて、処理効果が迅速にかつ中
央部にまで及ぶことによると解される。事実、実験で
は、エレメントの大きな材料（無垢材、ブロックボー
ド、合板等において、特に高い処理効果が得られてい
る。It is not always clear why the above-described effects can be obtained by the method of the present invention, but it is necessary to repeat a process in which (decompression as required) → introduction of high-pressure steam → release of pressure is repeated a plurality of times. Will repeatedly apply excessive flow of high-pressure steam and up and down fluctuations of pressure to the wood material, thereby destroying the wall holes in the wood element of the wood material to be treated and reducing the treatment effect. It is understood that it quickly and to the central part. In fact, in experiments, particularly high processing effects have been obtained for materials with large elements (solid wood, blockboard, plywood, etc.).
【００２４】[0024]
【発明の実施の形態】以下、図面を参照しつつ本発明を
さらに詳細に説明する。図１は本発明の木質材の寸法安
定化処理方法を実施する装置の一例である。図におい
て、１ａ、１ｂは、従来の木材処理で用いられる平板プ
レスに装着されると同様のプレス盤であり、それぞれに
熱源としてのヒータ２ａ、２ｂが設けられ、さらに、処
理すべき木質材Ｗと衝接することとなる表面部分には多
数の細孔３ａ、３ｂが形成されている。上方のプレス盤
１ａに形成された細孔３ａは配管４ａ及び開閉弁Ｖを介
して高圧水蒸気発生源Ｓに接続しており、下方のプレス
盤１ｂに形成された細孔３ｂは配管４ｂを介して真空ポ
ンプＶＰに接続している。配管４ｂには三方弁ＶTを介
して分岐管４ｃが接続しており、該分岐管４ｃの他端は
大気に解放している。真空ポンプに変えてブロアー（図
１には示されない）を用いてもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows an example of an apparatus for carrying out a method for stabilizing the size of wood material according to the present invention. In the figure, reference numerals 1a and 1b denote press plates similar to those mounted on a flat plate press used in conventional wood processing, which are provided with heaters 2a and 2b as heat sources, respectively. A large number of pores 3a, 3b are formed in the surface portion that comes into contact with the surface. The fine holes 3a formed in the upper press platen 1a are connected to the high-pressure steam generation source S via a pipe 4a and an on-off valve V, and the fine holes 3b formed in the lower press platen 1b are connected via a pipe 4b. Connected to the vacuum pump VP. The pipe 4b is branched pipe 4c is connected via a three-way valve V T, the other end of the branch pipe 4c is open to the atmosphere. A blower (not shown in FIG. 1) may be used instead of the vacuum pump.
【００２５】この装置を用いて本発明による処理方法を
実施するに際しては、先ず、処理すべき平板状の木質材
Ｗを、下方のプレス盤１ｂの該細孔３ｂが形成されてい
る位置に載置する。一方、上方のプレス盤１ａには前記
木質材Ｗを収容できる位置にステンレス材等からなる方
形状の厚さ規制治具１０をネジ止め（図示されない）等
により固定する。図中、１１は厚さ規制治具１０の下端
縁に取り付けた弾性シール材である。この厚さ規制治具
１０は下方のプレス盤１ｂに固定的に取り付けてもよ
く、いずれの場合であっても、厚さ規制治具１０の高さ
は、木質材Ｗの厚さと同じであるか幾分低いものとす
る。In carrying out the treatment method according to the present invention using this apparatus, first, a flat wooden material W to be treated is placed on the lower press platen 1b at a position where the small holes 3b are formed. Place. On the other hand, a rectangular thickness regulating jig 10 made of stainless steel or the like is fixed to the upper press platen 1a at a position where the wooden material W can be accommodated by screwing (not shown) or the like. In the figure, reference numeral 11 denotes an elastic sealing material attached to the lower end edge of the thickness regulating jig 10. This thickness regulating jig 10 may be fixedly attached to the lower press platen 1b, and in any case, the height of the thickness regulating jig 10 is the same as the thickness of the wooden material W. Or somewhat lower.
【００２６】次に、プレス盤１ａ、１ｂを該厚さ規制治
具１０により規制されるまで接近させ、停止させる。図
示しないが、前記のように木質材Ｗの周囲に密封材料を
配置して、プレス盤１ａ、１ｂの間に密封空間を形成す
るようにしてもよい。Next, the press plates 1a and 1b are approached and stopped until they are regulated by the thickness regulating jig 10. Although not shown, a sealing material may be arranged around the wooden material W as described above to form a sealed space between the press plates 1a and 1b.
【００２７】その状態で、高圧水蒸気発生源Ｓ側の配管
４ａに設けた開閉弁Ｖを閉じ、真空ポンプＶＰ（又は、
ブロアー）を作動し、かつ三方弁ＶT を操作して、下方
のプレス盤１ｂに形成した細孔３ｂから真空引きを行な
う。所定圧に減圧した時点で、三方弁ＶT を操作して配
管４ｂを閉鎖する。次に、高圧水蒸気発生源Ｓ側の配管
４ａに設けた開閉弁Ｖを開き、プレス盤１ａに形成した
細孔３ａから高圧水蒸気を密封空間内に噴出する。細孔
３ａから木質材Ｗに向けてあるいは密封空間に向けて噴
出する水蒸気は、噴出力に加えて吸引力による力を受
け、木質材の木質材Ｗの内部にまで容易にかつ均一に到
達し、木質材Ｗは内部水分が水蒸気化する温度に達す
る。In this state, the on-off valve V provided on the pipe 4a on the high-pressure steam generation source S side is closed, and the vacuum pump VP (or
Actuating the blower), and by operating the three-way valve V T, performing evacuation from the pores 3b which is formed below the press platen 1b. When the pressure was reduced to a predetermined pressure, by operating the three-way valve V T to close the pipe 4b. Next, the on-off valve V provided in the pipe 4a on the side of the high-pressure steam generation source S is opened, and high-pressure steam is jetted into the sealed space from the fine holes 3a formed in the press platen 1a. Water vapor spouting from the pores 3a toward the wood material W or toward the sealed space receives the force of the suction force in addition to the ejection power, and easily and uniformly reaches the inside of the wood material W. The wood material W reaches a temperature at which the internal moisture becomes steam.
【００２８】所望量の高圧水蒸気の噴出を終えた後、三
方弁ＶT を操作して密封空間を分岐管４ｃを介して大気
に解放し、圧の解放を行う。解圧により、供給した水蒸
気と共に木質材の内部水分も放出されて、木質材の含水
率は低下する。これで、１回目のサイクルは終了する。
圧解放後、好ましくは１分〜５分程度経過した後に、２
回目のサイクルとして、再び、三方弁ＶT を操作して密
封空間を真空ポンプＶＰ側に接続し、密封空間内の減圧
を行う。木質材の含水率が所定値（３％程度）になるま
で、以下同様の操作を必要回数繰り返す。その際に、高
圧水蒸気導入処理の時間を次第に長くしていくことは有
効である。[0028] After completion of the ejection of the desired amount high pressure steam, the sealed space via the branch pipe 4c by operating the three-way valve V T is released to the atmosphere, it releases the pressure. Due to the decompression, the internal moisture of the wood is released together with the supplied steam, and the water content of the wood is reduced. This ends the first cycle.
After releasing the pressure, preferably after about 1 to 5 minutes,
As times th cycle, again, by operating the three-way valve V T connects the sealed space to a vacuum pump VP side, performs decompression of the sealed space. Until the water content of the wood material reaches a predetermined value (about 3%), the same operation is repeated as many times as necessary. At that time, it is effective to gradually increase the time of the high-pressure steam introduction treatment.
【００２９】木質材が所定の含水率となった時点で、再
度、前記サイクルを反復する。但し、この場合には、こ
れまでよりも長い時間高圧水蒸気の供給を行うことが望
ましい。また、２回目以降のサイクルにおいて最初の減
圧操作を行うことは必ずしも必要ない。必要回数だけ上
記サイクルを繰り返し、所定の寸法安定処理が達成され
た時点で、必要に応じて冷却工程を行ないながら、木質
材を取り出し、本発明による木質材の寸法安定化処理方
法は終了する。When the wood material reaches a predetermined moisture content, the above cycle is repeated again. However, in this case, it is desirable to supply the high-pressure steam for a longer time than before. It is not always necessary to perform the first decompression operation in the second and subsequent cycles. The above cycle is repeated a required number of times, and at the time when the predetermined dimensional stabilization processing is achieved, the wooden material is taken out while performing a cooling step as necessary, and the wooden material dimensional stabilization processing method according to the present invention ends.
【００３０】図２は本発明の木質材の寸法安定化処理方
法を実施する装置の他の例を示している。この例は、プ
レス盤に外部に連通する細孔が設けられていない平板プ
レスを本発明の処理方法に用いる場合に好適な例であ
り、蒸気噴出用の細孔２３ａを有する平板状の第１の別
部材２０ａがネジ２１ａを用いて上方のプレス盤１ａに
固定され、さらに、真空引き用の細孔２３ｂを有する平
板状の第２の別部材２０ｂがネジ２１ｂを用いて下方の
プレス盤１ｂに固定されている。そして、それぞれの細
孔２３ａ、２３ｂは、図１に示した装置の場合と同様
に、高圧水蒸気発生源Ｓ及び真空ポンプＶＰに接続して
いる。この装置の使用方法は図１の場合と実質的に同じ
である。FIG. 2 shows another example of an apparatus for carrying out the method for stabilizing the size of wood according to the present invention. This example is a preferred example in the case where a flat plate press in which a press plate is not provided with pores communicating with the outside is used in the processing method of the present invention, and a flat plate-like first plate having pores 23a for steam ejection is used. Is fixed to the upper press platen 1a using screws 21a, and a flat plate-like second separate member 20b having pores 23b for evacuation is formed using the screws 21b. It is fixed to. Each of the pores 23a and 23b is connected to a high-pressure steam generation source S and a vacuum pump VP, as in the case of the apparatus shown in FIG. The method of using this device is substantially the same as in FIG.
【００３１】[0031]
【実施例】以下、実施例に基づき本発明を説明する。 〔実施例１〕寸法が１５×３００×１８００ｍｍで、常
温での含水率７．７％であるＭＤＦを、ヒーター加熱に
より前もって１９５℃に加温した寸法１６×３３０×１
８５０ｍｍの耐圧容器内に配置した。この容器内を密封
し、容器内を１サイクル目、７５０ｍｍＨｇまで減圧し
た後、容器内部に１５ｋｇｆ／ｃｍ2 、１９５℃の飽和
水蒸気を３分間導入した。解圧弁を開いて容器内部を解
圧した。解圧後のＭＤＦの含水率は３．３％であった。
１分後に、解圧弁を閉じ内部を密封した後、２サイクル
目として、同じ飽和水蒸気を６分間導入した。その後、
再度解圧弁を操作して常圧に戻し、処理済のＭＤＦを取
り出した。The present invention will be described below with reference to examples. Example 1 MDF having a size of 15 × 300 × 1800 mm and a water content of 7.7% at room temperature was heated to 195 ° C. in advance by heating with a heater to a size of 16 × 330 × 1.
It was placed in an 850 mm pressure vessel. After sealing the inside of the container and reducing the pressure in the container to 750 mmHg in the first cycle, saturated steam of 15 kgf / cm 2 and 195 ° C. was introduced into the container for 3 minutes. The pressure relief valve was opened to release the pressure inside the container. The water content of MDF after decompression was 3.3%.
One minute later, the pressure relief valve was closed to seal the inside, and then the same saturated steam was introduced for 6 minutes in the second cycle. afterwards,
The pressure relief valve was operated again to return to normal pressure, and the treated MDF was taken out.
【００３２】〔比較例１〕寸法が１５×３００×１８０
０ｍｍで、常温での含水率７．７％であるＭＤＦを、熱
風温度１５０℃、風速２５ｍのジェットドライヤーによ
って、ボード温度１３６℃、ボード含水率３．５％にま
で下げた後に、ヒーター加熱により１９５℃に加熱した
寸法１６×３３０×１８５０ｍｍの耐圧容器内に配置し
た。この容器内を密封し、７５０ｍｍＨｇまで減圧した
後、容器内部に１５ｋｇｆ／ｃｍ2、１９５℃の飽和水
蒸気を１０分間導入した。処理後に解圧弁を操作して容
器内部を常圧に戻し、処理済のＭＤＦを取り出した。[Comparative Example 1] The dimensions were 15 × 300 × 180.
0 mm, MDF having a water content of 7.7% at room temperature was reduced to a board temperature of 136 ° C. and a board water content of 3.5% by a jet dryer having a hot air temperature of 150 ° C. and a wind speed of 25 m, and then heated by a heater. It was placed in a pressure-resistant container of dimensions 16 × 330 × 1850 mm heated to 195 ° C. After sealing the inside of the container and reducing the pressure to 750 mmHg, 15 kgf / cm 2 , 195 ° C. saturated steam was introduced into the container for 10 minutes. After the treatment, the pressure relief valve was operated to return the inside of the container to normal pressure, and the treated MDF was taken out.
【００３３】〔比較例２〕寸法が１５×３００×１８０
０ｍｍで、常温での含水率７．７％であるＭＤＦを、ヒ
ーター加熱により前もって１９５℃に加温した寸法１６
×３３０×１８５０ｍｍの耐圧容器内に配置した。この
容器内を密封し７００ｍｍＨｇまで減圧した後、容器内
部に１５ｋｇｆ／ｃｍ2 、１９５℃の飽和水蒸気を２０
分間導入した。蒸気の供給を停止した後、解圧弁を開い
て常圧に戻し、処理済の木質材を取り出した。[Comparative Example 2] The dimensions were 15 × 300 × 180.
MDF having a water content of 7.7% at room temperature at 0 mm was heated to 195 ° C. in advance by heating with a heater.
It was arranged in a pressure vessel of × 330 × 1850 mm. After sealing the inside of the container and reducing the pressure to 700 mmHg, 15 kgf / cm 2 and 195 ° C.
Introduced for a minute. After the supply of steam was stopped, the pressure relief valve was opened to return to normal pressure, and the treated wood was taken out.
【００３４】〔実施例２〕寸法が１５×３００×１８０
０ｍｍで、常温での含水率７．７％であるパーチクルボ
ードを、ヒーター加熱によって前もって１９５℃に加温
した寸法１６×３３０×１８５０ｍｍの耐圧容器内に配
置した。この容器内を密封し、容器内を１サイクル目、
７００ｍｍＨｇまで減圧した後、容器内部に１７．５ｋ
ｇｆ／ｃｍ2 、２０５℃の飽和水蒸気を１分間導入し
た。その後、解圧弁を開いて容器内部を解圧した。１分
後に、２サイクル目として、解圧弁を閉じ密封した後、
容器内部を７００ｍｍＨｇまで減圧し、その後に容器内
部に同じ飽和水蒸気を２分間導入した。解圧後のパーチ
クルボードの含水率は３．５％であった。次に、３サイ
クル目として、容器内を密封し、７００ｍｍＨｇまで減
圧した後、容器内部に１５ｋｇｆ／ｃｍ2 、２０５℃の
飽和水蒸気を１０分間導入した。処理後に解圧弁を操作
して容器内部を常圧に戻し、処理済のパーチクルボード
を取り出した。[Embodiment 2] The dimensions are 15 × 300 × 180.
A particle board of 0 mm and having a water content of 7.7% at room temperature was placed in a pressure-resistant container of dimensions 16 × 330 × 1850 mm, which was previously heated to 195 ° C. by heating with a heater. The inside of this container is sealed, and the inside of the container is the first cycle,
After reducing the pressure to 700 mmHg, 17.5 k
Saturated steam at 205 ° C. and gf / cm 2 was introduced for 1 minute. Thereafter, the pressure relief valve was opened to release the pressure inside the container. One minute later, as the second cycle, after closing and sealing the pressure relief valve,
The pressure inside the vessel was reduced to 700 mmHg, and then the same saturated steam was introduced into the vessel for 2 minutes. The moisture content of the particle board after decompression was 3.5%. Next, as a third cycle, the inside of the vessel was sealed and the pressure was reduced to 700 mmHg, and then saturated steam at 15 kgf / cm 2 and 205 ° C was introduced into the vessel for 10 minutes. After the treatment, the pressure relief valve was operated to return the inside of the container to normal pressure, and the treated particle board was taken out.
【００３５】〔比較例３〕寸法が１５×３００×１８０
０ｍｍで、常温での含水率７．７％であるパーチクルボ
ードを高周波加熱によってボード温度１４６℃、含水率
３．７％にした後、蒸気加熱によって前もって２０５℃
に加温した寸法が１６×３３０×１８５０ｍｍの耐圧容
器内に配置した。この容器内を密封し、７００ｍｍＨｇ
まで減圧した後、容器内部に１７．５ｋｇｆ／ｃｍ2 、
２０５℃の飽和水蒸気を１５分間導入した。その後、解
圧弁を開いて容器内部を解圧し、処理済のパーチクルボ
ードを取り出した。[Comparative Example 3] The dimensions were 15 × 300 × 180.
A 0 mm, particle board having a water content of 7.7% at room temperature is heated to a board temperature of 146 ° C. and a water content of 3.7% by high frequency heating, and then 205 ° C. in advance by steam heating.
Was placed in a pressure-resistant container having dimensions of 16 × 330 × 1850 mm. Seal the inside of this container, 700mmHg
After the pressure was reduced to 17.5 kgf / cm 2 ,
205 ° C. saturated steam was introduced for 15 minutes. Thereafter, the pressure relief valve was opened to release the pressure inside the container, and the treated particle board was taken out.
【００３６】〔比較例４〕寸法が１５×３００×１８０
０ｍｍで、常温での含水率７．７％であるパーチクルボ
ードを、蒸気加熱によって前もって２０５℃に加温した
寸法が１６×３３０×１８５０ｍｍの耐圧容器内に配置
した。この容器内を密封し、７００ｍｍＨｇまで減圧し
た後、容器内部に１７．５ｋｇｆ／ｃｍ2 、２０５℃の
飽和水蒸気を２５分間導入した。その後、解圧弁を開い
て容器内部を解圧し、処理済のパーチクルボードを取り
出した。[Comparative Example 4] The dimensions were 15 × 300 × 180.
A particle board having a water content of 7.7% at room temperature and having a size of 0 mm was placed in a pressure-resistant container having dimensions of 16 × 330 × 1850 mm, which was previously heated to 205 ° C. by steam heating. After sealing the inside of the container and reducing the pressure to 700 mmHg, saturated steam of 17.5 kgf / cm 2 and 205 ° C. was introduced into the container for 25 minutes. Thereafter, the pressure relief valve was opened to release the pressure inside the container, and the treated particle board was taken out.
【００３７】〔評価試験〕前記の実施例１、２、比較例
１〜４、及び、実施例及び比較例で用いた木質材であっ
て無処理のものについて、厚さ膨張率及び剥離強さ（ｋ
ｇｆ／ｃｍ2 ）を測定した。その結果を表１に示す。な
お、厚さ膨張率は（Ｔ1 −Ｔ0 ）／Ｔ0 ×１００であ
り、ここで、Ｔ0 ＝絶乾時の厚さ、Ｔ1 ＝飽水時の厚
さ。また、剥離試験は、５ｃｍ角試験片を剥離試験治具
に取り付け、試験片の内部剥離試験を行って内部剥離力
を求め、その値を試験片面積２５ｃｍ2 で割って１ｃｍ
2 当たりの内部剥離応力を求めた。[Evaluation Test] The wood materials used in Examples 1 and 2, Comparative Examples 1 to 4 and Examples and Comparative Examples, which were not treated, had a thickness expansion coefficient and a peel strength. (K
gf / cm 2 ). Table 1 shows the results. The thickness expansion coefficient is (T 1 −T 0 ) / T 0 × 100, where T 0 = thickness when absolutely dry and T 1 = thickness when saturated. In the peel test, a 5 cm square test piece was attached to a peel test jig, an internal peel test was performed on the test piece to determine an internal peel force, and the value was divided by a test piece area of 25 cm 2 to obtain 1 cm
The internal peeling stress per 2 was determined.
【００３８】[0038]
【表１】 [Table 1]
【００３９】〔考察〕表１に示されるように、本発明品
では、（減圧→）高圧水蒸気導入→圧解放、を１サイク
ルとする処理を２回又は３回繰り返すことにより、無処
理のもの比較して高い寸法安定性が得られ、前記サイク
ルを繰り返さないで処理したもの（比較例２、４）と比
較してより短い処理時間で同程度の寸法安定性が得ら
れ、また、予め含水率を低下させた木質材を用いて処理
したもの（比較例１、３）と比較して、同程度の高圧水
蒸気処理時間でありながら同程度の寸法安定性が得られ
ることが分かる。[Consideration] As shown in Table 1, the product of the present invention is untreated by repeating the process of (reduced pressure →) introduction of high-pressure steam → release of pressure twice or three times. Higher dimensional stability is obtained compared to those treated without repeating the cycle (Comparative Examples 2 and 4), and comparable dimensional stability is obtained in a shorter processing time. It can be seen that the same dimensional stability can be obtained even with the same high-pressure steam treatment time as compared with those processed using the wood material with a reduced rate (Comparative Examples 1 and 3).
【００４０】[0040]
【発明の効果】本発明による木質材の寸法安定化処理方
法によれば、従来法に比較して、短い高圧水蒸気処理時
間で同等の処理効果を上げることができる。それによ
り、高圧水蒸気の製造にかかるコストを低減でき、処理
単価を下げることができる。また、処理木質材に対して
予備乾燥を施す必要がないことから、乾燥施設に要する
経費や設置場所が不要であり、また、予備乾燥後に高圧
水蒸気処理にいたるまでの間に木質材が吸湿してしまう
ことにより生じるロスも回避される。According to the method for stabilizing the size of wood according to the present invention, the same effect can be obtained with a shorter high-pressure steam treatment time than the conventional method. Thereby, the cost required for producing high-pressure steam can be reduced, and the processing unit price can be reduced. In addition, since there is no need to perform pre-drying on the treated wood, the cost and installation place required for the drying facility is unnecessary, and the wood may absorb moisture before the high-pressure steam treatment after the pre-drying. The loss caused by the loss is also avoided.
【図１】木質材の寸法安定化処理方法を実施する装置の
一例を示す図。FIG. 1 is a diagram showing an example of an apparatus for performing a method for stabilizing a size of a wooden material.
【図２】木質材の寸法安定化処理方法を実施する装置の
他の例を示す図。FIG. 2 is a diagram showing another example of an apparatus for performing a method for stabilizing the size of a wooden material.
１ａ、１ｂ…プレス盤、２ａ、２ｂ…ヒータ、３ａ…高
圧水蒸気導入用細孔、３ｂ…真空引き用細孔、４ａ…高
圧水蒸気供給用配管、５ｂ…真空引き用配管、１０…厚
さ規制治具、Ｗ…木質材、Ｓ…高圧水蒸気供給源、Ｖ…
開閉弁、ＶT …三方弁、ＶＰ…真空ポンプ1a, 1b: press board, 2a, 2b: heater, 3a: pore for introducing high-pressure steam, 3b: pore for evacuation, 4a: piping for supplying high-pressure steam, 5b: piping for evacuation, 10: thickness regulation Jig, W: wood material, S: high-pressure steam supply source, V:
The opening and closing valve, V T ... three-way valve, VP ... vacuum pump
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成９年６月１２日[Submission date] June 12, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２５[Correction target item name] 0025
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２５】この装置を用いて本発明による処理方法を
実施するに際しては、先ず、処理すべき平板状の木質材
Ｗを、下方のプレス盤１ｂの該細孔３ｂが形成されてい
る位置に載置する。一方、上方のプレス盤１ａには前記
木質材Ｗを収容できる位置にステンレス材等からなる方
形状の厚さ規制治具１０をネジ止め（図示されない）等
により固定する。図中、１１は厚さ規制治具１０の下端
縁に取り付けた弾性シール材である。この厚さ規制治具
１０は下方のプレス盤１ｂに固定的に取り付けてもよ
い。In carrying out the treatment method according to the present invention using this apparatus, first, a flat wooden material W to be treated is placed on the lower press platen 1b at a position where the small holes 3b are formed. Place. On the other hand, a rectangular thickness regulating jig 10 made of stainless steel or the like is fixed to the upper press platen 1a at a position where the wooden material W can be accommodated by screwing (not shown) or the like. In the figure, reference numeral 11 denotes an elastic sealing material attached to the lower end edge of the thickness regulating jig 10. This thickness regulating jig 10 may be fixedly attached to the lower press platen 1b.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２６[Correction target item name] 0026
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２６】次に、プレス盤１ａ、１ｂを該厚さ規制治
具１０により規制されるまで接近させ、停止させる。図
示しないが、前記のように木質材Ｗの周囲に密封材料を
配置して、プレス盤１ａ、１ｂの間に密封空間を形成す
るようにしてもよい。実施例に示すように、形成される
密封空間は、処理すべき木質材Ｗの当初厚みよりもわず
かに広い高さを持つ密封空間としてもよい。Next, the press plates 1a and 1b are approached and stopped until they are regulated by the thickness regulating jig 10. Although not shown, a sealing material may be arranged around the wooden material W as described above to form a sealed space between the press plates 1a and 1b. As shown in the embodiment, the sealed space formed may be a sealed space having a height slightly wider than the initial thickness of the wood material W to be treated.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３０[Correction target item name] 0030
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３０】図２は本発明の木質材の寸法安定化処理方
法を実施する装置の他の例を示している。この例は、プ
レス盤に外部に連通する細孔が設けられていない平板プ
レスを本発明の処理方法に用いる場合に好適な例であ
り、蒸気噴出用の細孔２３ａを有する平板状の第１の別
部材２０ａがネジ２１ａを用いて上方のプレス盤１ａに
固定され、さらに、真空引き用の細孔２３ｂを有する平
板状の第２の別部材２０ｂがネジ２１ｂを用いて下方の
プレス盤１ｂに固定されている。そして、それぞれの細
孔２３ａ、２３ｂは、図１に示した装置の場合と同様
に、高圧水蒸気発生源Ｓ及び真空ポンプＶＰに接続して
いる。この装置の使用方法は図１の場合と実質的に同じ
である。この場合でも、実施例に示すように、形成され
る密封空間は、処理すべき木質材Ｗの当初厚みよりもわ
ずかに広い高さを持つ密封空間としてもよい。FIG. 2 shows another example of an apparatus for carrying out the method for stabilizing the size of wood according to the present invention. This example is a preferred example in the case where a flat plate press in which a press plate is not provided with pores communicating with the outside is used in the processing method of the present invention, and a flat plate-like first plate having pores 23a for steam ejection is used. Is fixed to the upper press platen 1a using screws 21a, and a flat plate-like second separate member 20b having pores 23b for evacuation is formed using the screws 21b. It is fixed to. Each of the pores 23a and 23b is connected to a high-pressure steam generation source S and a vacuum pump VP, as in the case of the apparatus shown in FIG. The method of using this device is substantially the same as in FIG. Even in this case, as shown in the embodiment, the formed sealed space may be a sealed space having a height slightly wider than the initial thickness of the wood material W to be treated.
【手続補正書】[Procedure amendment]
【提出日】平成９年６月２３日[Submission date] June 23, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項８[Correction target item name] Claim 8
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１１[Correction target item name] Claim 11
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１１】 [0011]
【課題を解決するための手段】 本発明の木質材の寸法安
定化処理方法は、上記知覚に基づくものであり、基本的
に、木質材を密封空間内に収容し、該密封空間内への高
圧水蒸気の導入及び該密封空間内の圧開放とからなるサ
イクルを、同じ密封空間内において連続して、少なくと
も２回以上繰り返すことにより該木質材の寸法安定化を
図ることを特徴とする。 The method for stabilizing the size of a wooden material according to the present invention is based on the above-mentioned perception. Basically, a wooden material is accommodated in a sealed space, and the wooden material is inserted into the sealed space. The cycle comprising the introduction of high-pressure steam and the release of pressure in the sealed space is repeated continuously at least twice in the same sealed space to stabilize the dimensions of the wood material.
Claims (7)
間内への高圧水蒸気の導入及び該密封空間内の圧解放と
からなるサイクルを、同じ密封空間内において連続し
て、少なくとも２回以上繰り返すことにより該木質材の
寸法安定化を図ることを特徴とする木質材の寸法安定化
処理方法。1. A cycle in which wood material is housed in a sealed space and the introduction of high-pressure steam into the sealed space and the pressure release in the sealed space is continuously performed in the same sealed space for at least 2 cycles. A dimensional stabilization processing method for a wooden material, characterized in that the dimensional stability of the wooden material is achieved by repeating at least twice.
ち該密封空間内の減圧を行うことを特徴とする請求項１
記載の木質材の寸法安定化処理方法。2. The method according to claim 1, wherein the pressure in the sealed space is reduced before introducing the high-pressure steam into the sealed space.
The method for stabilizing the dimensions of the wood material described.
特徴とする請求項２記載の木質材の寸法安定化処理方
法。3. The method according to claim 2, wherein the decompression is performed for each cycle.
に木質材を収容することを特徴とする請求項１ないし３
いずれか記載の木質材の寸法安定化処理方法。4. The method according to claim 1, wherein the sealed space is heated in advance, and a wooden material is accommodated therein.
Any one of the above-described methods for stabilizing wood materials.
がら前記処理を行なうことを特徴とする請求項１ないし
３いずれか記載の木質材の寸法安定化処理方法。5. The dimensional stabilization method for a wooden material according to claim 1, wherein the processing is performed while compressing and compressing the wooden material in the sealed space.
成されることを特徴とする請求項１ないし３いずれか記
載の木質材の寸法安定化処理方法。6. The method according to claim 1, wherein the sealed space is formed between two press plates.
導入を該プレス盤を介して行なうことを特徴とする請求
項６記載の木質材の寸法安定化処理方法。7. The dimensional stabilization method for wood material according to claim 6, wherein the depressurized and high-pressure steam in the sealed space is introduced through the press platen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25035596A JP3442229B2 (en) | 1996-09-20 | 1996-09-20 | Dimensional stabilization method for wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25035596A JP3442229B2 (en) | 1996-09-20 | 1996-09-20 | Dimensional stabilization method for wood |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003088622A Division JP3813938B2 (en) | 2003-03-27 | 2003-03-27 | Dimensional stabilization treatment method for wood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1095003A true JPH1095003A (en) | 1998-04-14 |
| JP3442229B2 JP3442229B2 (en) | 2003-09-02 |
Family
ID=17206695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25035596A Expired - Fee Related JP3442229B2 (en) | 1996-09-20 | 1996-09-20 | Dimensional stabilization method for wood |
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| Country | Link |
|---|---|
| JP (1) | JP3442229B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008152955A1 (en) * | 2007-06-11 | 2008-12-18 | National University Corporation Kyoto Institute Of Technology | Method of processing plant |
-
1996
- 1996-09-20 JP JP25035596A patent/JP3442229B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008152955A1 (en) * | 2007-06-11 | 2008-12-18 | National University Corporation Kyoto Institute Of Technology | Method of processing plant |
| EP2163364A1 (en) * | 2007-06-11 | 2010-03-17 | National University Corporation Kyoto Institute of Technology | Method of processing plant |
| EP2163364A4 (en) * | 2007-06-11 | 2011-03-23 | Nat Univ Corp Kyoto Inst Tech | Method of processing plant |
| US8216506B2 (en) | 2007-06-11 | 2012-07-10 | National University Corporation Kyoto Institute Of Technology | Method of processing plant |
| JP4997650B2 (en) * | 2007-06-11 | 2012-08-08 | 国立大学法人京都工芸繊維大学 | Plant processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3442229B2 (en) | 2003-09-02 |
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