JP3533990B2 - Method of manufacturing soundboard for musical instruments - Google Patents
Method of manufacturing soundboard for musical instrumentsInfo
- Publication number
- JP3533990B2 JP3533990B2 JP16598499A JP16598499A JP3533990B2 JP 3533990 B2 JP3533990 B2 JP 3533990B2 JP 16598499 A JP16598499 A JP 16598499A JP 16598499 A JP16598499 A JP 16598499A JP 3533990 B2 JP3533990 B2 JP 3533990B2
- Authority
- JP
- Japan
- Prior art keywords
- soundboard
- shape
- compressed
- wood board
- mold
- 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.)
- Expired - Fee Related
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Stringed Musical Instruments (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はバイオリン等の楽器
用響板の製造方法に関し、詳しくは、振動特性に優れた
楽器用響板を、低コストで木材資源を無駄にせず製造で
きるようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a soundboard for musical instruments such as a violin, and more particularly to a soundboard for musical instruments having excellent vibration characteristics, which can be manufactured at low cost without wasting wood resources. It is a thing.
【０００２】[0002]
【従来の技術】従来、バイオリン、ビオラ等のバイオリ
ン属に使用される楽器用響板の製造は、スプルース、カ
エデ等の木材板を響板形状に削り出す方法や、響板に必
要な厚みを有する木材板を熱圧プレス成形し、響板形状
に形成する方法等で行われている。2. Description of the Related Art Conventionally, the production of soundboards for musical instruments used for violins such as violins and violas has been accomplished by carving wood plates such as spruce and maple into a soundboard shape, and the thickness required for soundboards. This is performed by a method of forming a soundboard shape by hot-pressing a wood board that it has.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、木材板
を響板形状に削り出す方法では、まず始めに原材料の木
材を乾燥するために乾燥コストがかかり、その後乾燥木
材から手作業やＮＣルーター等で削り出すために熟練し
た技術や高度な加工設備が必要であり、加工コストが高
かった。また、原材料の木材板としては、立体的な響板
形状を削り出すのに十分な体積を有するものが必要であ
り、原材料の歩留りが悪く、木材資源を無駄にするとい
う問題もあった。さらに、このようにして得られた響板
は、削り出しによって木材繊維が断絶されるため、振動
特性が良好ではなかった。響板に必要な厚みを有する木
材板を熱圧プレス成形し、響板形状に形成する方法で
は、原材料の木材板の含水率を１５％程度に制御してか
ら成形する必要があり、手間がかかった。また、熱圧プ
レス成形時に木材板に引張り力がかかって割れたり、形
状固定が熱のみによるため成形後の響板に内部応力が蓄
積し、空気中の水分によって響板の形状が戻るという問
題があった。さらに、このようにして得られた響板に
は、内部応力が蓄積しているために、振動特性が良好で
はなかった。However, in the method of carving a wood board into a soundboard shape, first, the raw material wood is dried, which requires a drying cost, and then the dry wood is manually or NC routered. Skilled technology and advanced processing equipment were required to cut out, and the processing cost was high. Further, as a raw material wood plate, a wood plate having a sufficient volume for carving out a three-dimensional soundboard shape is required, and there is a problem that the raw material yield is poor and wood resources are wasted. Further, the soundboard thus obtained was not good in vibration characteristics because the wood fibers were cut off by shaving. In a method of forming a soundboard shape by hot-pressing a wood board having a necessary thickness for the soundboard, it is necessary to control the water content of the raw material wood board to about 15%, which is troublesome. It took. In addition, there is a problem that the wooden board is cracked by tensile force during hot press molding, and internal stress accumulates in the soundboard after molding because the shape is fixed only by heat, and the soundboard shape returns due to moisture in the air. was there. Further, the sound board obtained in this way had poor vibration characteristics because of the accumulation of internal stress.
【０００４】本発明は前記事情に鑑みてなされたもの
で、振動特性に優れた楽器用響板を低コストで、木材資
源を無駄にせず製造する方法を提供することを課題とす
る。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a soundboard for musical instruments having excellent vibration characteristics at low cost and without wasting wood resources.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明にあって
は、幅方向に圧縮された圧縮木材板を煮沸または低温水
蒸気処理で軟化した後、該圧縮木材板を楽器用響板に沿
う形状のキャビティを有する型内に収め、該圧縮木材板
の幅方向を固定しながら響板形状にプレス成形し、次い
でこの圧縮木材板を高温水蒸気雰囲気中で保持し、形状
の固定化を行うことを特徴とする楽器用響板の製造方法
によって解決できる。請求項２の発明にあっては、幅方
向に圧縮された圧縮木材板を煮沸または低温水蒸気処理
で軟化した後、該圧縮木材板を楽器用響板に沿う形状の
キャビティを有する型内に収め、該圧縮木材板の幅方向
を固定しながら響板形状にプレス成形し、次いでこの圧
縮木材板を上記キャビティ内に密封した状態で加熱し、
形状の固定化を行うことを特徴とする楽器用響板の製造
方法によって解決できる。 Means for Solving the Problems] According to the invention of claim 1, after softening the compressed wood plate which is compressed in the transverse direction at boiling or low-temperature steam treatment, along the compressed wood plate Instrument soundboard The compressed wood board is housed in a mold having a shaped cavity.
It can be solved by a method of manufacturing a soundboard for musical instruments, which is characterized in that the soundboard is press-formed into a soundboard shape while fixing the widthwise direction , and then this compressed wood board is held in a high temperature steam atmosphere to fix the shape. . In the invention of claim 2, the width
Boiled or low-temperature steamed compressed wood plates compressed in the same direction
After softening with a
Stored in a mold with a cavity, the width direction of the compressed wood board
It was pressed into a soundboard shape while fixing the, then this pressure
Heat the curled wood plate in a sealed state in the cavity,
The problem can be solved by a method for manufacturing a soundboard for musical instruments, which is characterized in that the shape is fixed .
【０００６】[0006]
【発明の実施の形態】以下、本発明を詳しく説明する。
図１は本発明の製造方法の一例を説明する工程図であ
る。本発明の製造方法においては、原材料としてあらか
じめ幅方向が圧縮された圧縮木材板１を使用する。 すな
わち、まず、原材料の木材から楽器用響板１０とほぼ同
じ程度の大きさ、厚みを有する木材板を切り出す。また
は、複数の板を切り出し、これらを矧ぎ合わせて１枚の
木材板としてもよい。原材料の木材は特に制限はない
が、音の放射特性等から、スプルース、カエデ、メイプ
ル等が好ましい。次いで、この木材板を木目と直角な方
向から機械的な圧力をかけそのまま圧縮するか、煮沸や
低温水蒸気処理等で軟化させた後、木材板１の幅方向を
プレス定盤等で通常１〜３０％程度の圧縮率で圧縮する
ことによって、圧縮木材板１とする。幅方向が圧縮され
た圧縮木材板１は、プレス成形時に圧縮木材板１の幅方
向に引張り力が加わっても割れにくいので好ましい。次
いで、圧縮木材板１を沸騰水２中で煮沸または低温水蒸
気３処理で軟化させる。軟化工程は、次いで行われるプ
レス成形中に圧縮木材板１が割れることを防ぐために行
われ、煮沸の場合は、圧縮木材板１を１００℃の沸騰水
２中で通常１分〜２時間、好ましくは３分〜１０分間煮
沸する。低温水蒸気３処理の場合は、圧縮木材板１を１
００〜１２０℃の水蒸気３中で通常１分〜２時間保持し
て軟化する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
FIG. 1 is a process chart for explaining an example of the manufacturing method of the present invention. In the manufacturing method of the present invention, the raw material is
The compressed wood board 1 compressed in the width direction is used. sand
That is, first, a wood board having substantially the same size and thickness as the musical instrument soundboard 10 is cut out from the raw material wood. Or, cut a plurality of plate may be a single timber plate combined rebate them. The raw material wood is not particularly limited, but spruce, maple, maple and the like are preferable from the viewpoint of sound radiation characteristics. Next, place this wood board at a right angle to the grain
Apply mechanical pressure from the opposite side to compress as it is, or boil or
After softening by low temperature steam treatment etc., the width direction of the wood board 1
It is usually compressed at a compression ratio of about 1 to 30% with a press surface plate or the like.
Thus, the compressed wood board 1 is obtained. Compressed in the width direction
The compressed wood board 1 is the width of the compressed wood board 1 during press forming.
It is preferable because it is unlikely to break even if a tensile force is applied in the opposite direction. Next, the compressed wood board 1 is softened by boiling in boiling water 2 or by treatment with low-temperature steam 3. The softening step is performed in order to prevent the compressed wood board 1 from cracking during the subsequent press molding, and in the case of boiling, the compressed wood board 1 is usually in boiling water 2 at 100 ° C. for usually 1 minute to 2 hours, preferably Boil for 3 to 10 minutes. For low temperature steam 3 treatment, 1 compressed wood board 1
Softening is usually carried out by holding in steam 3 at 00 to 120 ° C. for 1 minute to 2 hours.
【０００７】次に、軟化させた圧縮木材板１を、楽器用
響板１０に沿う形状のキャビティ４ａを有し、上型４ｂ
と下型４ｃからなる金属製の型４内に配置してプレス成
形し、楽器用響板１０の形状に成形する。この場合のプ
レス圧力は１０〜２０ｋｇ／ｃｍ２程度であるが、圧縮
木材板１が十分軟らかい場合は１０ｋｇ／ｃｍ２未満の
圧力でもよい。ついでプレス成形した圧縮木材板１を高
温水蒸気５雰囲気中で保持して形状の固定化を行う。形
状の固定化は１３０〜２００℃、好ましくは１４０〜１
８０℃の高温水蒸気５中１分〜２時間、好ましくは５〜
１０分間保持して行う。形状の固定化は、例えば、圧縮
木材板１を型４ごと高温水蒸気５雰囲気のオートクレー
ブ等内に収める方法や成形後の圧縮木材板１に高温水蒸
気５を蒸射する方法等で行う。このように形状の固定化
が加熱のみではなく、水の存在する高温水蒸気５雰囲気
中で加熱処理する方法によるため、圧縮木材板１中のセ
ルロース鎖の非晶質部分が部分的に切断し、再配列が起
こり、圧縮木材板１の形状が固定化される。圧縮木材板
１の形状の固定化が、圧縮木材板１中のセルロース鎖の
非晶質部分が再配列することによるので、圧縮木材板１
の結晶化度が上がり、圧縮木材板１に内部応力が蓄積し
ない。したがって、振動特性の優れた楽器用響板１０が
得られる。また、圧縮木材板１を高温水蒸気５雰囲気中
に保持することによって、圧縮木材板１に深みのある色
調が付与され、楽器用響板１０の塗装工程を短縮するこ
ともできる。形状の固定化後、木材板１を６０℃以下の
温度まで冷却後乾燥し、楽器用響板１０を得る。Next, the softened compressed wood board 1 has a cavity 4a having a shape along the soundboard 10 for musical instruments, and an upper mold 4b.
It is placed in a metal mold 4 consisting of a lower mold 4c and a lower mold 4c, and press-molded to form the soundboard 10 for a musical instrument. The pressing pressure in this case is about 10 to 20 kg / cm 2 , but the compression is
When the wood board 1 is sufficiently soft, the pressure may be less than 10 kg / cm 2 . Then, the press-formed compressed wood board 1 is held in an atmosphere of high temperature steam 5 to fix the shape. The shape is fixed at 130 to 200 ° C, preferably 140 to 1
1 minute to 2 hours in high temperature steam 5 at 80 ° C, preferably 5 to
Hold for 10 minutes. Shape fixation is, for example, compression
The wood board 1 is put together with the mold 4 in an autoclave or the like in an atmosphere of high temperature steam 5, or a method of steaming the high temperature steam 5 on the compressed wood board 1 after molding. In this way, the shape is fixed not only by heating but also by heating in a high-temperature steam 5 atmosphere in which water is present, so that the amorphous part of the cellulose chains in the compressed wood plate 1 is partially cut, Rearrangement occurs and the shape of the compressed wood board 1 is fixed. Compressed wood board
Immobilization of 1 shape, since the amorphous portion of cellulose chains of compressed wood plate in 1 by rearranging, compressed wood board 1
And the internal stress does not accumulate in the compressed wood board 1 . Therefore, the musical instrument soundboard 10 having excellent vibration characteristics can be obtained. Further, by holding the compressed wood board 1 in the high temperature steam 5 atmosphere, color tone having a deep is applied to the compressed wood plate 1, it is also possible to shorten the coating process of the musical instrument sound board 10. After fixing the shape, the wood board 1 is cooled to a temperature of 60 ° C. or less and then dried to obtain a musical instrument soundboard 10.
【０００８】また、本発明においては、圧縮木材板１の
幅方向の長さが戻らないように仮固定してプレス成形す
る。仮固定は、加熱による方法、圧縮木材板１とほぼ同
じ大きさの枠状の形状固定用治具等を用いる方法等があ
るが、幅方向の長さを固定する枠状の形状固定用治具等
で圧縮木材板１を固定しながらプレス成形することが好
ましい。また、枠状の形状固定用治具等を使用する代わ
りに、図３に示すように、キャビティ４ａ内に圧縮木材
板１の幅方向の長さを規制する枠状のストッパー４ｅが
設けられた型４を用いて、圧縮木材板１の幅方向の長さ
を固定しながらプレス成形してもよい。このような型４
を使用すると、プレス成形中に圧縮木材板１の幅方向の
長さが戻ることがない。また軟化、プレス成形を連続し
て効率よく行うことができるので好ましい。 Further , in the present invention, the compressed wood board 1
Temporarily fix and press-mold so that the width does not return.
It Temporary fixing is by heating, almost the same as compressed wood board 1.
There are methods such as using a frame-shaped shape fixing jig of the same size.
However, a frame-shaped shape-fixing jig that fixes the length in the width direction, etc.
It is preferable to press-mold while fixing the compressed wood board 1 with
Good Also, instead of using a frame-shaped shape fixing jig, etc.
Then, as shown in FIG. 3, the compressed wood is put in the cavity 4a.
The frame-shaped stopper 4e that regulates the length of the plate 1 in the width direction is
Using the provided mold 4, the length of the compressed wood board 1 in the width direction
You may press-mold, fixing. Such a type 4
Allows the compressed wood board 1 to be
The length never returns. In addition, softening and press molding
It is preferable because it can be performed efficiently.
【０００９】また本発明の製造方法においては、プレス
成形に使用する型４としてキャビティ４ａ内が密封され
る構造の型４を用い、プレス成形の後、キャビティ４ａ
内に圧縮木材板１を密封した状態で型４を加熱、熱処理
して形状の固定化を行ってもよい。すなわち、型４とし
て、図２に示すように上型４ｂおよび下型４ｃからな
り、プレス成形時に上型４ｂと下型４ｃがシリコ−ン樹
脂製等のパッキン４ｄで密着するもの等を使用し、プレ
ス成形後、キャビティ４ａ内に圧縮木材板１が配置され
キャビティ４ａ内が密封されたままの状態で、型４を１
３０〜２００℃、好ましくは１４０〜１８０℃に昇温
し、１分〜２時間、好ましくは５〜１０分間保持して熱
処理し、形状の固定化を行う。この場合、圧縮木材板１
がキャビティ４ａ内に密封されているので、圧縮木材板
１中の水分が熱処理中にキャビティ４ａの外部に漏れず
に昇温され、キャビティ４ａ内が圧縮木材板１の水分に
由来する高圧水蒸気５雰囲気となる。したがって、圧縮
木材板１中のセルロース鎖の非晶質部分が再配列して圧
縮木材板１の結晶化度が上がり、振動特性の優れた楽器
用響板１０が得られる。このようにキャビティ４ａ内が
密封される構造の型４を用いることによって、プレス成
形、形状の固定化を連続的に行うことができる。Further, in the manufacturing method of the present invention, a mold 4 having a structure in which the inside of the cavity 4a is sealed is used as the mold 4 used for press molding, and after the press molding, the cavity 4a is formed.
The mold 4 may be heated and heat-treated to fix the shape while the compressed wood plate 1 is sealed therein. That is, as the die 4, there is used an upper die 4b and a lower die 4c as shown in FIG. 2, in which the upper die 4b and the lower die 4c are closely adhered by a packing 4d made of silicone resin or the like during press molding. After the press molding, the compressed wood plate 1 is placed in the cavity 4a, and the mold 4 is placed in the state in which the cavity 4a remains sealed.
The shape is fixed by heating to 30 to 200 ° C., preferably 140 to 180 ° C., and holding for 1 minute to 2 hours, preferably 5 to 10 minutes to perform heat treatment. In this case, compressed wood board 1
Is sealed in the cavity 4a, so compressed wood board
During the heat treatment, the moisture in 1 is heated without leaking to the outside of the cavity 4a, and the inside of the cavity 4a becomes a high-pressure steam 5 atmosphere derived from the moisture of the compressed wood board 1 . Therefore compression
The amorphous part of the cellulose chain in the wood board 1 is rearranged and pressure is applied.
The crystallinity of the curled wood board 1 is increased, and the soundboard 10 for musical instruments having excellent vibration characteristics is obtained. By using the mold 4 having such a structure that the inside of the cavity 4a is sealed, press molding and fixing of the shape can be continuously performed.
【００１０】このような楽器用響板１０の製造方法によ
れば、圧縮木材板１を軟化して響板１０形状にプレス成
形するので、木質繊維が断絶されずに曲面形状の響板１
０を製造でき、優れた振動特性を有する響板１０を得る
ことができる。また、原材料の木材から響板１０を削り
出す従来の製造方法にくらべて、少ない原材料から製造
することができ木材資源を無駄することがなく、コスト
を低減できる。また形状の固定化によって、木材のセル
ロース鎖が再配列し、結晶度が上がるので、加熱のみで
形状が固定化された木材板にくらべて、水分による形状
回復が起こりにくく、かつ、振動特性の優れた楽器用響
板１０を得ることができるとともに、深みのある色調が
付与され、楽器用響板１０の塗装工程を短縮することも
できる。また、木材板１の幅方向を圧縮した圧縮木材板
１を用いることによって、プレス成形時に圧縮木材板１
の幅方向に引張り力が加わっても割れにくいので、振動
特性の優れた響板１０を効率よく製造できる。さらに圧
縮木材板１を、形状固定用治具やストッパー４ｅ付きの
型４を使用し、幅方向の長さを固定しながらプレス成形
することによって、圧縮木材板１の幅方向の長さが戻る
ことなく、安定に楽器用響板１０を製造できる。なお、
以上説明した製造方法は、バイオリン、ビオラ、チェロ
等のバイオリン属に使用される楽器用響板１０に限ら
ず、３次元形状の共鳴箱を有するダブルベース等の木製
楽器全般に適用できる。According to the method for manufacturing the soundboard 10 for musical instruments as described above, the compressed wood board 1 is softened and press-formed into the shape of the soundboard 10. Therefore, the soundboard 1 having a curved shape is maintained without breaking the wood fiber.
0 can be manufactured, and the soundboard 10 having excellent vibration characteristics can be obtained. Further, as compared with the conventional manufacturing method in which the soundboard 10 is cut out from the raw material wood, the soundboard 10 can be manufactured from a small amount of the raw material, the wood resources are not wasted, and the cost can be reduced. In addition, since the cellulose chains of wood are rearranged and the crystallinity is increased by fixing the shape, it is less likely that shape recovery due to moisture will occur and the vibration characteristics of the wood plate will be less likely to occur as compared with the wood plate whose shape is fixed only by heating. It is possible to obtain an excellent musical instrument soundboard 10, and at the same time, a deep color tone is provided, so that the painting process of the musical instrument soundboard 10 can be shortened. Moreover, the compressed wood board which compressed the width direction of the wood board 1
By using 1 , compressed wood board 1 at the time of press molding
The soundboard 10 having excellent vibration characteristics can be efficiently manufactured because it is hard to break even if a tensile force is applied in the width direction. Further, the compressed wood board 1 is press-molded by using a shape fixing jig or a mold 4 with a stopper 4e while fixing the widthwise length, whereby the widthwise length of the compressed wood board 1 is restored. The soundboard 10 for a musical instrument can be stably manufactured without the need. In addition,
The manufacturing method described above can be applied not only to the soundboard 10 for musical instruments used for violins such as violins, violas, and cellos, but also to general wooden musical instruments such as double basses having a three-dimensional resonance box.
【００１１】[0011]
【実施例】以下、本発明を実施例を示して具体的に説明
する。
［参考例］
幅方向を中央でユリア・メラミン樹脂形接着剤で矧ぎ合
わせた、長さ４１５ｍｍ×幅２３０ｍｍ×厚さ４ｍｍの
スプルース乾燥木材板を、１００℃の沸騰水中で３分間
処理し軟化した。次いで、上型と下型からなり、バイオ
リン響板に沿う形状で４３０ｍｍ×２３０ｍｍ×３０ｍ
ｍの大きさの金属製型のキャビティ内に、軟化後の木材
板を配置し、１５ｋｇ／ｃｍ２の圧力でプレス成形し
た。この型は、プレス成形時にはシリコーン樹脂製パッ
キンで上型と下型が密着し、キャビティ内が密封される
ようになっている。なお、プレス時の木材板は軟らか
く、プレス成形時の圧力は、主にパッキンの密着のため
に必要な圧力である。木材板がキャビティ内に配置さ
れ、キャビティ内が密封されたままの状態で、この型を
上下熱盤で昇温して１４０℃で１０分間保持し、木材板
の形状の固定化を行った。その後、キャビティ内を密封
したまま型を６０℃まで冷却し、型内の木材板を取り出
した。こうして成形された木材板は表面に割れがなく、
深みのある色調を有し、バイオリン響板に適したもので
あった。EXAMPLES The present invention will be specifically described below with reference to examples. [ Reference Example ] A spruce-dried wood board having a length of 415 mm, a width of 230 mm, and a thickness of 4 mm, which is glued with a urea / melamine resin adhesive in the center in the width direction, is softened by being treated in boiling water at 100 ° C. for 3 minutes did. Next, it consists of an upper mold and a lower mold, and the shape is 430 mm x 230 mm x 30 m along the violin soundboard.
The softened wood plate was placed in the cavity of a metal mold having a size of m, and press-molded at a pressure of 15 kg / cm 2 . In this mold, the upper mold and the lower mold are brought into close contact with each other by a silicone resin packing during press molding, and the inside of the cavity is sealed. The wooden board is soft during pressing, and the pressure during press molding is mainly the pressure required for the tight contact of the packing. With the wood plate placed in the cavity and the inside of the cavity kept sealed, this mold was heated by the upper and lower heating plates and held at 140 ° C. for 10 minutes to fix the shape of the wood plate. Then, the mold was cooled to 60 ° C. with the cavity kept sealed, and the wood plate in the mold was taken out. The wooden board molded in this way has no cracks on the surface,
It had a deep color tone and was suitable for violin soundboards.
【００１２】［実施例１］
幅方向を中央でユリア・メラミン樹脂形接着剤で矧ぎ合
わせた、長さ４１５ｍｍ×幅２４３ｍｍ×厚さ４ｍｍの
カエデ乾燥木材板を、１００℃の沸騰水中で３０分間処
理し軟化した。次いで、幅方向を１５ｋｇ／ｃｍ２の圧
力でプレス定盤でプレスして幅方向に約５％圧縮し、そ
のままの状態でプレス定盤を１２０℃で３０分間保持
し、加熱、乾燥により木材板の形状を仮固定した。この
木材板を、木材板が幅方向に広がることを防止する枠状
のストッパーが設けられた以外は参考例と同様の金属製
型のキャビティ内に配置し、型を完全に締めない状態
で、木材板に１００℃の水蒸気を５分間蒸射し軟化し
た。軟化後、引き続き、実施例１と同様にして上型と下
型を圧締し、木材板のプレス成形、キャビティを密封し
ての形状の固定化、冷却を行い、表面に割れがなく、深
みのある色調を有し、バイオリン響板に適した木材板を
得た。[ Example 1 ] A maple dried wood board having a length of 415 mm x a width of 243 mm x a thickness of 4 mm, which was glued together with a urea / melamine resin type adhesive in the center in the width direction, was placed in boiling water at 100 ° C for 30 minutes. It was treated for a minute and softened. Then, the width direction is pressed with a press surface plate at a pressure of 15 kg / cm 2 to compress the width direction by about 5%, and the press surface plate is kept as it is at 120 ° C. for 30 minutes, heated and dried to obtain a wooden board. The shape of was temporarily fixed. This wood board is placed in a cavity of a metal mold similar to the reference example except that a frame-shaped stopper that prevents the wood board from spreading in the width direction is provided, and in a state where the mold is not completely tightened, The wood board was softened by steaming steam at 100 ° C. for 5 minutes. After softening, the upper mold and the lower mold are subsequently pressed in the same manner as in Example 1, the wood plate is press-molded, the cavity is hermetically sealed and the shape is fixed, and the surface is not cracked and deep. A wood board having a certain color tone and suitable for a violin sound board was obtained.
【００１３】［実施例２］
幅方向を中央でユリア・メラミン樹脂形接着剤で矧ぎ合
わせた、長さ４４０ｍｍ×幅２５２ｍｍ×厚さ４ｍｍの
カエデ乾燥木材板を、１００℃の沸騰水中で３０分間処
理し軟化した。次いで、幅方向を１５ｋｇ／ｃｍ２の圧
力でプレス定盤でプレスして幅方向に約５％圧縮した。
この際、幅方向が２４０ｍｍに固定される枠型を使用
し、プレスを解放しても木材板が幅方向に広がらないよ
うにした。次いで、枠型で幅方向が固定されたままの圧
縮木材板を、シリコーン樹脂製パッキンがついておら
ず、上型と下型の間に厚さ４ｍｍのスペーサーをいれた
以外は参考例と同様の金属製型のキャビティ内に配置
し、１５ｋｇ／ｃｍ２の圧力でプレス成形した。なお、
プレス時の木材板は軟らかいので、１５ｋｇ／ｃｍ２の
圧力で圧締めした際に、圧縮されすぎないようにスペー
サーを用いた。木材板がキャビティ内に配置され、プレ
ス成形されたままの状態で、この型をオートクレーブに
入れ、１４０℃の水蒸気を１０分間蒸射し、木材板の形
状の固定化を行った。その後、木材板および型を６０℃
まで冷却した後、型内の木材板を取り出した。こうして
成形された木材板は表面に割れがなく、深みのある色調
を有し、バイオリン響板に適したものであった。[ Example 2 ] A maple dried wood board having a length of 440 mm, a width of 252 mm and a thickness of 4 mm, which was glued together with a urea / melamine resin type adhesive in the center in the width direction, was placed in boiling water at 100 ° C for 30 minutes. It was treated for a minute and softened. Then, the width direction was pressed with a press surface plate at a pressure of 15 kg / cm 2 to compress the width direction by about 5%.
At this time, a frame die whose width direction was fixed at 240 mm was used so that the wood plate did not spread in the width direction even when the press was released. Next, the compressed wood board which was fixed in the width direction with a frame mold was the same as the reference example except that a silicone resin packing was not attached and a spacer having a thickness of 4 mm was inserted between the upper mold and the lower mold. It was placed in a cavity of a metal mold and press-molded at a pressure of 15 kg / cm 2 . In addition,
Since the wood plate at the time of pressing is soft, a spacer was used so as not to be over-compressed when being pressed with a pressure of 15 kg / cm 2 . With the wood plate placed in the cavity and in the state of being press-molded, this mold was placed in an autoclave and steam of 140 ° C. was steamed for 10 minutes to fix the shape of the wood plate. Then, the wood board and the mold are placed at 60 ° C.
After cooling to, the wood board in the mold was taken out. The wood board thus formed had no surface cracks and had a deep color tone, and was suitable for a violin soundboard.
【００１４】[0014]
【発明の効果】以上説明したように本発明の製造方法に
よれば、圧縮木材板を軟化して響板形状にプレス成形す
るので、木質繊維が断絶されずに曲面形状の響板を製造
でき、優れた振動特性を有する響板を得ることができ
る。また、原材料の木材から響板を削り出す従来の製造
方法にくらべて、少ない原材料から製造することができ
木材資源を無駄することがなく、コストを低減できる。
また形状の固定化によって、木材のセルロース鎖が再配
列し、結晶度が上がるので、加熱のみで形状が固定化さ
れた木材板にくらべて、水分による形状回復が起こりに
くく、かつ、振動特性の優れた楽器用響板を得ることが
できるとともに、固定化処理により材料が濃い褐色を帯
びるため、楽器用響板の塗装工程を短縮しながらも透明
感を持った深みのある外観に仕上げることができる。ま
た、木材板の幅方向を圧縮した圧縮木材板を用いること
によって、プレス成形時に圧縮木材板の幅方向に引張り
力が加わっても割れにくいので、振動特性の優れた響板
を効率よく製造できる。さらに圧縮木材板を、形状固定
用治具やストッパー付きの型を使用し、幅方向の長さを
固定しながらプレス成形することによって、圧縮木材板
の幅方向の長さが戻ることなく、安定に楽器用響板を製
造できる。As described above, according to the manufacturing method of the present invention, since the compressed wood board is softened and press-formed into the soundboard shape, it is possible to manufacture the soundboard having a curved surface shape without breaking the wood fiber. Therefore, a soundboard having excellent vibration characteristics can be obtained. Further, as compared with the conventional manufacturing method in which the soundboard is cut out from the raw material wood, it can be manufactured from a smaller number of raw materials, the wood resources are not wasted, and the cost can be reduced.
In addition, since the cellulose chains of wood are rearranged and the crystallinity is increased by fixing the shape, it is less likely that shape recovery due to moisture will occur and the vibration characteristics of the wood plate will be less likely to occur as compared with the wood plate whose shape is fixed only by heating. An excellent soundboard for musical instruments can be obtained, and since the material is dark brown due to the immobilization treatment, it is possible to finish with a transparent and deep appearance while shortening the painting process of the soundboard for musical instruments. it can. Further, by using a compressed wood plate that is compressed in the width direction of the wood plate, it is difficult to crack even if a tensile force is applied in the width direction of the compressed wood plate during press molding, so a soundboard with excellent vibration characteristics can be efficiently manufactured. . Furthermore, by pressing the compressed wood plate while fixing the width in the width using a shape fixing jig or a mold with a stopper, the width of the compressed wood plate does not return in the width direction, and it is stable. Can manufacture soundboards for musical instruments.
【図１】 本発明の製造方法の一例を示す工程図であ
る。FIG. 1 is a process drawing showing an example of a manufacturing method of the present invention.
【図２】 本発明の製造方法で使用する成型機の一例を
示す断面図である。FIG. 2 is a cross-sectional view showing an example of a molding machine used in the manufacturing method of the present invention.
【図３】 本発明の製造方法の他の一例を示す工程図で
ある。FIG. 3 is a process drawing showing another example of the manufacturing method of the present invention.
【符号の説明】１…圧縮木材板
、３…低温水蒸気、４…型、４ａ…キャ
ビティ、５…高温水蒸気、１０…楽器用響板[Explanation of Codes] 1 ... Compressed wood board , 3 ... Low temperature steam, 4 ... Mold, 4a ... Cavity, 5 ... High temperature steam, 10 ... Soundboard for musical instrument
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−11105（ＪＰ，Ａ) 特開 平10−166319（ＪＰ，Ａ) 特開 平１−216802（ＪＰ，Ａ) 特開 平６−259063（ＪＰ，Ａ) 特開 平６−285818（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G10D 3/02 B27K 5/00 B27M 1/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-11105 (JP, A) JP-A-10-166319 (JP, A) JP-A-1-216802 (JP, A) JP-A-6- 259063 (JP, A) JP-A-6-285818 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) G10D 3/02 B27K 5/00 B27M 1/02
Claims (2)
たは低温水蒸気処理で軟化した後、該圧縮木材板を楽器
用響板に沿う形状のキャビティを有する型内に収め、該
圧縮木材板の幅方向を固定しながら響板形状にプレス成
形し、次いでこの圧縮木材板を高温水蒸気雰囲気中で保
持し、形状の固定化を行うことを特徴とする楽器用響板
の製造方法。1. A After softening the compressed wood plate which is compressed in the transverse direction at boiling or low-temperature steam treatment, contained within a mold having a cavity of a shape along the compressed wood plate Instrument soundboard, the
A method for manufacturing a soundboard for musical instruments, characterized by press-molding a compressed wood board in a soundboard shape while fixing the widthwise direction , and then holding the compressed wood board in a high-temperature steam atmosphere to fix the shape. .
たは低温水蒸気処理で軟化した後、該圧縮木材板を楽器
用響板に沿う形状のキャビティを有する型内に収め、該
圧縮木材板の幅方向を固定しながら響板形状にプレス成
形し、次いでこの圧縮木材板を上記キャビティ内に密封
した状態で加熱し、形状の固定化を行うことを特徴とす
る楽器用響板の製造方法。2. After softening the compressed wood plate which is compressed in the transverse direction at boiling or low-temperature steam treatment, contained within a mold having a cavity of a shape along the compressed wood plate Instrument soundboard, the
A soundboard for musical instruments, characterized in that the compressed wood board is press-formed into a soundboard shape while fixing the widthwise direction , and then the compressed wood board is heated while being sealed in the cavity to fix the shape. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16598499A JP3533990B2 (en) | 1999-06-11 | 1999-06-11 | Method of manufacturing soundboard for musical instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16598499A JP3533990B2 (en) | 1999-06-11 | 1999-06-11 | Method of manufacturing soundboard for musical instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000352971A JP2000352971A (en) | 2000-12-19 |
| JP3533990B2 true JP3533990B2 (en) | 2004-06-07 |
Family
ID=15822726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16598499A Expired - Fee Related JP3533990B2 (en) | 1999-06-11 | 1999-06-11 | Method of manufacturing soundboard for musical instruments |
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| Country | Link |
|---|---|
| JP (1) | JP3533990B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005205799A (en) * | 2004-01-23 | 2005-08-04 | Gifutoku Co Ltd | Method for producing veneer and its three-dimensional processing method |
| JP4766512B2 (en) * | 2005-12-14 | 2011-09-07 | オリンパス株式会社 | Wood processing method |
| JP4624975B2 (en) * | 2006-12-12 | 2011-02-02 | オリンパス株式会社 | Compressed wood products, musical instruments, and wood processing methods |
| JP6156053B2 (en) * | 2013-10-22 | 2017-07-05 | ヤマハ株式会社 | Manufacturing method of stringed instrument board |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01216802A (en) * | 1988-02-25 | 1989-08-30 | Shizuoka Prefecture | Method for bending wood |
| JPH06259063A (en) * | 1993-03-08 | 1994-09-16 | Shigehiro Arai | Acoustic board of stringed instrument |
| JPH06285818A (en) * | 1993-04-02 | 1994-10-11 | Takeji Motai | Shaping method of stock such as round timber or the like |
| JP3078451B2 (en) * | 1994-07-04 | 2000-08-21 | 横井工業株式会社 | Wood processing method |
| JP3833319B2 (en) * | 1996-12-06 | 2006-10-11 | 光彦 棚橋 | Method and apparatus for consolidation of wood |
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1999
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| JP2000352971A (en) | 2000-12-19 |
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