JP3207250B2 - Turning method of raw wood in veneer lace - Google Patents
Turning method of raw wood in veneer laceInfo
- Publication number
- JP3207250B2 JP3207250B2 JP18305392A JP18305392A JP3207250B2 JP 3207250 B2 JP3207250 B2 JP 3207250B2 JP 18305392 A JP18305392 A JP 18305392A JP 18305392 A JP18305392 A JP 18305392A JP 3207250 B2 JP3207250 B2 JP 3207250B2
- Authority
- JP
- Japan
- Prior art keywords
- log
- speed
- stepping
- backup roll
- turning
- 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
- Manufacture Of Wood Veneers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ベニヤレースに於ける
原木の旋削方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for turning raw wood in veneer lace.
【０００２】[0002]
【従来の技術】従前、ベニヤレースによって原木を旋削
する工程に於て、削成するベニヤ単板（以下、単に単板
と称す）の厚さを変更する際には、鉋台を歩送りする歩
送り機構の作動を一時休止して、原木の旋削を暫時中断
すると共に、必要に応じては、鉋台を若干後退させ、鉋
台の歩送り速度（換言すると、原木一回転当りに対する
鉋台の原木求心方向への移送量）を別の所望速度に切替
てから、再び鉋台を歩送りして、原木の旋削を再開する
のが通例であったが、斯様な旋削方法によると、旋削の
中断に伴う生産性の低下が弊害となり、極めて不合理で
あった。2. Description of the Related Art Conventionally, in the process of turning a log by veneer lace, when changing the thickness of a veneer veneer to be cut (hereinafter simply referred to as veneer), a step of feeding a plane table is used. Pauses the operation of the feed mechanism, temporarily suspends turning of the log, and if necessary, slightly retracts the plane table, and moves the plane table at the stepping speed (in other words, the centripetal direction of the log of the plane table per rotation of the log). It has been customary to switch the transfer amount to another desired speed, and then to feed the plane table again to restart the turning of the log. However, according to such a turning method, the turning of the raw wood is interrupted. The drop in productivity was harmful and extremely irrational.
【０００３】そこで近年、例えば「ベニヤレースにおけ
る鉋台移送装置」（実公昭６２−３７６８３号公報）に
開示される如く、予め歩送り機構による歩送り速度を多
段的に切替可能に構成しておき、原木を旋削する途上に
於て、鉋台の歩送り速度を現行速度から別の所定速度へ
間断なく切替えて、原木の旋削を継続しつつ、削成する
単板の厚さを無段階状に変換することにより、従前の旋
削方法に於ける弊害の発生を防止せんとする技術が提案
されて、その有益性が認められるに至り、更に所望の歩
送り速度を制約なく選択できる一層有効な技術として、
サーボモータ・油圧サーボ等を駆動源（作動源）とする
無段可変速式の歩送り機構を用い、鉋台の歩送り速度を
所望通りに変更する方式も既に実用化に至っている。[0003] In recent years, for example, as disclosed in "Planet table transfer device for veneer lace" (Japanese Utility Model Publication No. Sho 62-37683), a stepping speed by a stepping mechanism is configured to be switchable in multiple stages in advance. In the process of turning the log, the feed speed of the plane table is switched from the current speed to another predetermined speed without interruption, and the thickness of the veneer to be cut is changed steplessly while continuing the turning of the log. By doing so, a technique for preventing the occurrence of adverse effects in the conventional turning method has been proposed, and its usefulness has been recognized, and as a more effective technique capable of selecting a desired stepping speed without restriction. ,
A system in which a stepping speed of a plane table is changed as desired by using a stepless variable speed type stepping mechanism using a servomotor, a hydraulic servo or the like as a driving source (operation source) has already been put to practical use.
【０００４】一方、旋削途上に於ける原木外周の少なく
とも一箇所を、バックアップロールによってバックアッ
プし、原木の撓み・振動等を予防しつつ、原木を可及的
細径にまで旋削する技術も従前から実用化されており、
常時一定の圧力を以ってバックアップロールを原木外周
へ押続ける方式も一部で実際に実施されてはいるが、原
木を過不足なくバックアップして、原木の撓み・振動等
を必要十分に予防するには、現に旋削途上にある原木の
外周の渦巻曲線に沿うよう適数本のバックアップロール
を位置させると共に、鉋台の歩送り動作に即応的に追従
させて、バックアップロールを歩送り速度に準ずる移動
速度（換言すると、原木一回転当りに対するバックアッ
プロールの原木求心方向への移送量）で順次移動させる
方式が優れていることも公知の通りである。On the other hand, at least one portion of the outer periphery of a log in the course of turning is backed up by a backup roll, and a technique for turning a log to the smallest possible diameter while preventing bending and vibration of the log has been used. Has been put into practical use,
Although a method in which the backup roll is constantly pushed to the outer periphery of the log with a constant pressure is actually implemented in some cases, the log is backed up without excess or shortage to prevent deflection and vibration of the log as necessary. To do this, an appropriate number of backup rolls are positioned along the spiral curve of the outer circumference of the log that is currently being turned, and the backup roll is made to follow the stepping operation of the plane table immediately, so that the backup roll follows the stepping speed. It is also well known that a method of sequentially moving at a moving speed (in other words, a transfer amount of the backup roll in the centripetal direction of the log per rotation of the log) is excellent.
【０００５】因に、原木が撓むと主に単板の厚さが不揃
いになる欠点が生じ、また原木が振動すると主に単板の
肌が劣悪になる欠点が生じるが、加えて、一旦前記いず
れかの欠点が生じると、該欠点が誘因となって、少なく
とも原木数回転分に亙り繰返し類似する欠点を誘発する
傾向があるので、原木の旋削には致命的である。[0005] When the log is bent, there is a disadvantage that the thickness of the veneer becomes uneven, and when the log vibrates, there arises a defect that the skin of the veneer becomes poor mainly. Turning any log is fatal, as any of the defects will tend to trigger similar defects repeatedly over at least several revolutions of the log.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記従
来の各技術は、異質な思想に基き、個別に開発・改良さ
れたものである故に、相互に関連性が全くなく、単純に
それらの技術を寄せ集めてたとしても、各技術本来の機
能を十分に発揮させるには至らないことが、本発明の開
発過程で判明した。However, since each of the above-mentioned conventional technologies is individually developed and improved based on different ideas, there is no relevance to each other, and these technologies are simply used. It has been found in the course of the development of the present invention that even if they are gathered together, they do not sufficiently exhibit the original functions of each technology.
【０００７】即ち、現に旋削途上にある原木の外周の渦
巻曲線に沿うよう適数本バックアップロールを位置させ
ると共に、鉋台の歩送り動作に即応的に追従させて、バ
ックアップロールを歩送り速度に準ずる移動速度で順次
移動させる構成と併せて、鉋台を歩送りする歩送り機構
に無段可変速式の歩送り機構を用い、原木の旋削を継続
しつつ、歩送り機構による鉋台の歩送り速度を現行速度
から別の所望速度へ間断なく変更し、単板の厚さを無段
階状に変更する構成を採ると、歩送り速度の変更に伴っ
て渦巻曲線が変化した原木の外周部分がバックアップロ
ールの位置に達する前に、バックアップロールの移動速
度が変わることになるので、バックアップに過不足が生
じ、概して原木を良好に旋削することが困難となる。That is, an appropriate number of backup rolls are positioned along the spiral curve of the outer periphery of the raw wood that is currently being turned, and at the same time, the backup roll is made to immediately follow the stepping operation of the plane table so that the backup roll follows the stepping speed. In addition to the configuration that moves sequentially at the moving speed, the stepping mechanism for stepping the plane table uses a stepless variable speed type stepping mechanism, and while continuing turning of the log, the stepping speed of the plane table by the stepping mechanism is increased. By changing the current speed from the current speed to another desired speed without interruption and changing the thickness of the veneer in a stepless manner, the outer peripheral portion of the raw wood whose spiral curve has changed with the change in the feed speed is a backup roll. Before reaching the position, the moving speed of the backup roll is changed, so that the backup becomes excessive or deficient, and it is generally difficult to turn the log well.
【０００８】[0008]
【課題を解決するための手段】本発明は、前記各技術の
長所を活しつつ有機一体的に融合させ、原木の撓み・振
動等を必要十分に予防しつつ、原木を可及的細径にまで
能率良く旋削し得る技術を開発したものであり、具体的
には、鉋台を歩送りする歩送り機構に無段可変速式の歩
送り機構を用いると共に、バックアップロールを移動さ
せる移動機構にも無段可変速式の移動機構を用い、原木
を旋削する途上に於て、前記歩送り機構による鉋台の歩
送り速度を現行速度から別の所望速度へ間断なく変更
し、原木の旋削を継続しつつ、削成する単板の厚さを無
段階状に変更する場合に、前記歩送り速度の変更に遅延
的に追従させて、前記移動機構によるバックアップロー
ルの移動速度を変更することを特徴とする旋削方法を提
案する。SUMMARY OF THE INVENTION The present invention utilizes the advantages of each of the above-mentioned technologies and integrates them in an organic manner so as to prevent the warp and vibration of the wood as necessary and sufficiently, and reduce the diameter of the wood as small as possible. The technology has been developed to enable efficient turning up to, and specifically, a stepless variable speed type stepping mechanism is used for the stepping mechanism for stepping the plane table, and a moving mechanism for moving the backup roll. In the process of turning the log, using the stepless variable speed moving mechanism, the feed speed of the plane table by the step feed mechanism is continuously changed from the current speed to another desired speed, and the turning of the log is continued. When the thickness of the veneer to be cut is changed steplessly, the moving speed of the backup roll by the moving mechanism is changed by following the change of the stepping speed with a delay. Is proposed.
【０００９】[0009]
【実施例】以下、本発明を図面に例示した実施の一例と
共に更に詳述するが、便宜上、原木外周の渦巻曲線は近
似的に表示した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to an embodiment illustrated in the drawings. For convenience, a spiral curve around a log is shown approximately.
【００１０】図１は、本発明の実施に用いるベニヤレー
スの側面説明図であり、図２は、図１に例示したベニヤ
レースの動作説明図である。FIG. 1 is an explanatory side view of a veneer lace used in the embodiment of the present invention, and FIG. 2 is an operation explanatory view of the veneer lace illustrated in FIG.
【００１１】図中、１は、刃口端が弾性変位自在な複数
の分割状のプレッシャバー２ａを原木１０の軸心と平行
方向に適宜間隔を隔てて付設したプレッシャバー台２、
後述する外周駆動機構３、刃物４等を具備した鉋台であ
って、後述する歩送り機構５の作動を得て、図示矢印方
向へ進退させられる。In the drawing, reference numeral 1 denotes a pressure bar base 2 provided with a plurality of divided pressure bars 2a whose blade ends can be elastically displaced at appropriate intervals in a direction parallel to the axis of the log 10;
It is a plane table provided with an outer peripheral drive mechanism 3, a blade 4, etc., which will be described later.
【００１２】３は、複数の針付円盤状の駆動部材３ａを
軸心方向の適宜間隔毎に付設した外周駆動ロール３ｂ、
三相誘導電動機等から成る定速駆動源３ｃ等を用いて構
成した外周駆動機構であって、後述する制御装置１３の
制御を得て、旋削寸前の原木１０の外周部分へ、単板１
１の削成に要する動力の大半を供給する。Reference numeral 3 denotes an outer peripheral drive roll 3b provided with a plurality of disk-shaped drive members 3a with needles at appropriate intervals in the axial direction.
An outer peripheral drive mechanism configured using a constant-speed drive source 3c or the like composed of a three-phase induction motor or the like.
Supply most of the power required for cutting.
【００１３】５は、ボールネジ等から成る送りネジ５
ａ、サーボモータ等から成る可変速駆動源５ｂ、ロータ
リエンコーダ等から成る位置検出器５ｃ等を用いて構成
した無段可変速式の歩送り機構であって、後述する制御
装置１３の制御を得て、前記鉋台１を図示矢印方向へ進
退させる。5 is a feed screw 5 composed of a ball screw or the like.
a, a stepless variable-speed stepping mechanism constituted by using a variable-speed drive source 5b composed of a servomotor and the like, and a position detector 5c composed of a rotary encoder and the like. Then, the plane table 1 is moved forward and backward in the direction indicated by the arrow.
【００１４】６は、軸受箱６ａを介して支持フレーム７
へ遊転可能に付設された中空筒状のバックアップロール
であって、好ましくは少なくとも原木１０の軸心方向の
中央部１／３に当接する長さを有し、後述する移動機構
８の作動を得て、支持フレーム７と一体的に図示矢印方
向へ往復動させられる。Reference numeral 6 denotes a support frame 7 via a bearing housing 6a.
A hollow cylindrical backup roll attached so as to be freely rotatable, preferably having a length at least in contact with the central portion 1/3 of the log 10 in the axial direction, and operating the moving mechanism 8 described later. Then, it is reciprocated integrally with the support frame 7 in the direction indicated by the arrow.
【００１５】８は、ボールネジ等から成る移動ネジ８
ａ、サーボモータ等から成る可変速駆動源８ｂ、ロータ
リエンコーダ等から成る位置検出器８ｃ等を用いて構成
した無段可変速式の移動機構であって、後述する制御装
置１３の制御を得て、前記バックアップロール６（及び
支持フレーム７）を図示矢印方向へ往復動させる。Reference numeral 8 denotes a moving screw 8 composed of a ball screw or the like.
a, a stepless variable-speed moving mechanism configured by using a variable-speed drive source 8b composed of a servomotor and the like, a position detector 8c composed of a rotary encoder and the like, and obtained under the control of a control device 13 described later. Then, the backup roll 6 (and the support frame 7) is reciprocated in the direction of the arrow shown in the figure.
【００１６】９は、ロータリエンコーダ等から成る回転
数検知器９ａ、直流電動機等からなる可変速駆動源９ｂ
等を用いて構成した原木回転機構であって、後述する制
御装置１３の制御を得て、少なくとも外周駆動機構３に
よる原木１０の外周駆動が開始される以前に、スピンド
ル１２を介して原木１０を回転（空転）させる。Reference numeral 9 denotes a rotational speed detector 9a comprising a rotary encoder or the like, and a variable speed drive source 9b comprising a DC motor or the like.
A raw wood rotation mechanism configured by using the above-described method. Under the control of the control device 13 described below, the raw wood 10 is rotated via the spindle 12 at least before the outer circumference driving mechanism 3 starts driving the outer circumference of the raw wood 10. Rotate (idle).
【００１７】１３は、制御装置であって、後述する原則
的な制御形態に基いて、前記外周駆動機構３、歩送り機
構５、移動機構８、原木回転機構９等の作動を制御する
が、必要に応じて、別途に詳述する例外的な制御形態を
も併有させて差支えない。Reference numeral 13 denotes a control device, which controls the operations of the outer peripheral drive mechanism 3, the stepping mechanism 5, the moving mechanism 8, the log rotation mechanism 9, and the like based on a principle control form described later. If necessary, an exceptional control mode which will be described in detail separately may be additionally used.
【００１８】即ち、詳述すると、先ず、ベニヤレースの
前段の原木供給機構（図示省略）からの原木供給完了信
号、運転者の起動確認信号等に基いて、原木１０の旋削
を開始する際には、原則として、原木回転機構９及び外
周駆動機構３を駆動して原木１０を回転させると共に、
歩送り機構５を作動させて所望の歩送り速度で鉋台１を
歩送りし、且つ同期的に移動機構８を作動させて前記歩
送り速度に準ずる移動速度でバックアップロール６を原
木求芯方向へ往動させるよう制御する。More specifically, first, when turning of the log 10 is started based on a log supply completion signal from a log supply mechanism (not shown) at the preceding stage of the veneer race, a start-up confirmation signal of the driver, and the like. Drives the log rotation mechanism 9 and the outer periphery drive mechanism 3 to rotate the log 10 in principle,
The stepping mechanism 5 is operated to step the plane table 1 at a desired stepping speed, and the moving mechanism 8 is operated synchronously to move the backup roll 6 in the centering direction of the log at a moving speed similar to the stepping speed. Control to move forward.
【００１９】尚、旋削の円滑性・所要動力の低減化等か
らして、原木回転機構９による原木１０の回転は、外周
駆動機構３による外周駆動に継続的に同調させるのが望
ましく、例えば歩送り機構５の位置検出器５ｃによって
刻々検出される鉋台１の位置を基準として、原木１０の
外径を推算し、推算された原木１０の外径（旋削前に
は、原木の外周が鉋台から離れているので、鉋台の位置
を基準にすると、推算値が実際の外径よりも過大となる
が、それよって特に問題が生じる虞はない）の大小とは
逆比例的に、原木回転機構９による原木１０の回転数を
増減して、外周速度を常に一定化させるよう制御すれば
足り、斯様に制御すれば、外周駆動機構３による原木１
０の外周駆動が開始された後は、単板１１の削成に要す
る動力の一部をスピンドル１２を介して原木１０へ供給
することが可能となる。It is desirable that the rotation of the log 10 by the log rotating mechanism 9 be continuously synchronized with the outer driving by the outer driving mechanism 3 in consideration of the smoothness of turning and reduction of required power. The outer diameter of the log 10 is estimated on the basis of the position of the plane 1 detected by the position detector 5c of the feed mechanism 5 every time, and the estimated outer diameter of the log 10 (before turning, the outer circumference of the log is Since the distance is large, the estimated value is excessively larger than the actual outer diameter based on the position of the plane table, but there is no particular problem. It is sufficient to increase or decrease the number of rotations of the log 10 by means of the above, so that the outer peripheral speed is always kept constant.
After the start of the outer peripheral drive of 0, a part of the power required for cutting the veneer 11 can be supplied to the log 10 via the spindle 12.
【００２０】次に、運転者の厚さ変更信号に基いて、原
木１０を旋削する途上で削成する単板１１の厚さを変更
する際には、原則として、外周駆動機構３及び原木回転
機構９の駆動を継続したまま、歩送り機構５による鉋台
１の歩送り速度を、現行速度から別の所望速度へ間断な
く変更すると共に、該歩送り速度の変更に遅延的に追従
させて、移動機構８によるバックアップロール６の移動
速度を、先に変更した歩送り速度に準ずる移動速度へ変
更するよう制御する。但し、実際上、速度の変更には、
瞬間的にせよ増減移行過程が不可欠であるから、本発明
に於ける間断なくの用語は、該増減移行過程の介入を許
容することを明記する。Next, when changing the thickness of the veneer 11 to be cut in the course of turning the log 10 based on the driver's thickness change signal, in principle, the outer periphery driving mechanism 3 and the log rotation are used. While the drive of the mechanism 9 is continued, the stepping speed of the plane table 1 by the stepping mechanism 5 is continuously changed from the current speed to another desired speed, and the change of the stepping speed is followed in a delayed manner. Control is performed such that the moving speed of the backup roll 6 by the moving mechanism 8 is changed to a moving speed corresponding to the previously changed stepping speed. However, in practice, when changing the speed,
Since a step-by-step transition is essential, even momentarily, constant terms in the present invention specify that intervention of the step-by-step transition is permitted.
【００２１】尚、移動機構による移動速度の変更を遅延
させる期間は、バックアップロールの配設本数及び配設
位置に応じて、該当するバックアップロール毎に設定す
れば差支えなく、実施例では、一本のバックアップロー
ルを刃物の刃先の正反対側に配設したので、丁度原木半
回転に相当する期間だけ遅延させれば足り、また図示は
省略したが、例えば二本のバックアップロールを、刃物
の刃先に対して原木三等分位置に配設した場合は、一方
を原木１／３回転、他方を原木２／３回転に相当する期
間だけ夫々遅延させれば足りる。The period during which the change of the moving speed by the moving mechanism is delayed can be set for each corresponding backup roll in accordance with the number and positions of the backup rolls. Since the backup roll is arranged on the opposite side of the blade edge of the blade, it is sufficient to delay it for a period equivalent to exactly half a turn of the log, and although not shown, for example, two backup rolls are attached to the blade edge of the blade. On the other hand, in the case where the logs are arranged at three equal positions, it is sufficient to delay one of the logs by a period corresponding to 1/3 rotation of the logs and the other by a period corresponding to 2/3 rotations of the logs.
【００２２】次に、鉋台１の前進限度を検知する前進限
検知器（図示省略）からの旋削終了信号、運転者の終了
確認信号等に基いて、原木１０の旋削を終える際には、
原則として、原木回転機構９及び外周駆動機構３の駆動
を継続したまま、歩送り機構５による鉋台１の歩送り
と、移動機構８によるバックアップロール６の往動を停
止させるよう制御し、更に次に、新たな旋削を待機させ
る際には、原則として、原木回転機構９及び外周駆動機
構３の駆動を一時休止すると共に、歩送り機構５を逆動
させて所定の早戻り速度で鉋台１を後退させ、且つ同期
的に移動機構８を逆動させて所定の早戻り速度でバック
アップロール６を原木遠芯方向へ復動させるよう制御す
る。Next, when turning of the log 10 is completed based on a turning end signal from a forward limit detector (not shown) for detecting a forward limit of the plane table 1, a driver's end confirmation signal, and the like.
In principle, while the driving of the log rotation mechanism 9 and the outer peripheral drive mechanism 3 is continued, the feed of the plane table 1 by the feed mechanism 5 and the forward movement of the backup roll 6 by the moving mechanism 8 are stopped. In addition, when waiting for a new turning, in principle, the driving of the log rotation mechanism 9 and the outer periphery driving mechanism 3 is temporarily stopped, and the stepping mechanism 5 is moved backward to move the plane table 1 at a predetermined quick return speed. The backup roll 6 is controlled so as to move backward and synchronously to reversely move the moving mechanism 8 so as to move the backup roll 6 backward at a predetermined quick return speed in the direction of the raw wood.
【００２３】尚、鉋台の後退位置及びバックアップロー
ルの復動位置は、次の原木の供給に支障のない範囲で、
可及的に次の原木の外径に近い位置が好ましく、予め原
木供給機構等に於て次の原木の外径を計測し、該計測値
に対応させて、前記後退位置及び復動位置を自動的或は
手動的に定めれば好都合である。The retreat position of the plane table and the return position of the backup roll are within a range that does not hinder the supply of the next log.
A position that is as close as possible to the outer diameter of the next log is preferable, and the outer diameter of the next log is measured in advance by a log supply mechanism or the like, and the retracted position and the return position are set in accordance with the measured values. It is convenient to determine automatically or manually.
【００２４】本発明は、前記の如く構成したベニヤレー
スを用いて実施することが可能であり、原木１０を旋削
する過程に於て、前記歩送り機構５による鉋台１の歩送
り速度を、現行速度から別の所望速度へ間断なく変更
し、原木１０の旋削を継続しつつ、削成する単板１１の
厚さを無段階状に変更した場合、例えば図２に例示する
如く、現行歩送り速度に適合する渦巻曲線ａに倣って削
成していた単板１１の厚さを、厚→薄に変更した場合、
実質的に鉋台１の歩送り速度が減速されることになり、
それに伴って渦巻曲線ｂは図示する如く変化する。The present invention can be carried out by using the veneer lace configured as described above. In the process of turning the log 10, the stepping speed of the plane table 1 by the stepping mechanism 5 is set at the present time. When the thickness of the veneer 11 to be cut is changed steplessly while continuously turning the log 10 from the speed to another desired speed and continuing the turning of the raw wood 10, for example, as shown in FIG. When the thickness of the veneer 11 cut in accordance with the spiral curve a that matches the speed is changed from thick to thin,
In effect, the stepping speed of the plane table 1 will be reduced,
Accordingly, the spiral curve b changes as shown.
【００２５】しかし、刃物４の刃先からバックアップロ
ール６に至る間の原木１０の外周部分は、既に渦巻曲線
ａに倣って旋削されているので、仮に、鉋台１の歩送り
速度の減速に即応的に追従させて、バックアップロール
６の移動速度を減速したとすると、前記外周部分に限っ
ては事実上バックアップロール６が当接せずに、バック
アップの用を成さなくなり、原木１０に撓み・振動等が
発生する不都合が生じるが、本発明にあっては、歩送り
速度の変更（減速）に遅延的に追従させて、移動機構９
によるバックアップロール６の移動速度を変更（減速）
する構成を採るので、斯様な不都合が生じる虞がない。However, since the outer peripheral portion of the log 10 from the cutting edge of the blade 4 to the backup roll 6 has already been turned in accordance with the spiral curve a, it is possible to respond immediately to the reduction in the stepping speed of the plane table 1. If the movement speed of the backup roll 6 is reduced by following the above, the backup roll 6 does not substantially come into contact with the outer peripheral portion alone, so that the backup roll 6 cannot be used for backup. However, in the present invention, the moving mechanism 9 is made to follow the change (deceleration) of the stepping speed in a delayed manner.
Changes the moving speed of the backup roll 6 due to
Since such a configuration is adopted, there is no possibility that such inconvenience occurs.
【００２６】勿論、逆に実質的に鉋台の歩送り速度を増
速することによって、削成する単板の厚さを、薄→厚に
変更した場合も同様に有効であり、仮に、鉋台の歩送り
速度の増速に即応的に追従させて、バックアップロール
の移動速度を増速したとすると、先記刃物の刃先からバ
ックアップロールに至る間の原木の外周部分に限って
は、バックアップロールが過剰に押圧されるので、該外
周部分が復元不能に潰れたり、原木に振動等が発生した
り、或はバックアップロールの軸受及び移動機構が異常
に損傷したりするなどの不具合が生じるが、本発明の如
く、歩送り速度の変更（増速）に遅延的に追従させて、
移動機構によるバックアップロールの移動速度を変更
（増速）する構成を採れば、斯様な不具合が生じる虞も
ない。Of course, conversely, it is similarly effective when the thickness of the veneer to be cut is changed from thin to thick by substantially increasing the stepping speed of the plane table. Assuming that the backup roll movement speed is increased by immediately following the increase in the stepping speed, the backup roll is limited to the outer peripheral portion of the raw wood from the cutting edge of the blade to the backup roll. Due to excessive pressing, the outer peripheral portion is irretrievably crushed, the log is vibrated, or the bearing and moving mechanism of the backup roll are abnormally damaged. As in the invention, by following the change (increase) of the stepping speed with a delay,
If a configuration is adopted in which the moving speed of the backup roll by the moving mechanism is changed (increased), there is no possibility that such a problem will occur.
【００２７】尚、実用上の利便性等を考慮して、前記制
御装置には、先記原則的な制御形態の外に、以下に詳述
する例外的な制御形態をも併有させて差支えない。In consideration of practical convenience and the like, the above-mentioned control device is provided with an exceptional control mode described below in addition to the above-mentioned principle control mode. Absent.
【００２８】先ず、原木の旋削を開始する際に、刃物の
交換等の要因によって、原木の外周に対し、鉋台（刃
物）を相当離して位置させることがあり、そのまま規定
の歩送り速度で歩送りしたのでは、旋削の開始がかなり
遅れることになるので、斯様な場合には、運転者の早期
作動信号等に基いて、鉋台及びバックアップロールを早
送り速度で原木に接近させ得るよう制御できれば至便で
あり、特にバックアップロールは、非円柱状の原木には
必ずしも作用させる必要がないから、運転者の移動休止
信号等に基いて、非円柱状の原木の旋削開始時には移動
を暫時休止させ、原木が略円柱状に旋削されてから、早
送り速度で原木に当接させ得るよう、単独でも制御でき
れば一層好便である。First, when starting the turning of a log, the plane table (knife) may be positioned at a considerable distance from the outer periphery of the log due to factors such as replacement of the blade. In the case of feeding, since the start of turning will be considerably delayed, in such a case, if it can be controlled so that the plane table and the backup roll can approach the log at the rapid feed speed based on the driver's early operation signal etc. It is convenient, especially the backup roll does not necessarily need to act on the non-cylindrical raw wood, so based on the driver's movement stop signal etc., temporarily stop the movement at the start of turning of the non-cylindrical raw wood, It is more convenient if the log can be controlled alone so that it can be brought into contact with the log at a rapid traverse speed after the log is turned into a substantially cylindrical shape.
【００２９】次に、原木を旋削する途上に於ては、刃物
の損壊等の要因によって、旋削を中断する必要が生じる
ことがあるので、運転者の中断信号等に基いて、各機構
の作動を一斉又は個別に停止し得るよう制御できるのが
望ましい。また例外的に本発明から離れて、原木を旋削
する過程で、従前通りの手順により、削成する単板の厚
さを変更する制御が行えるよう構成しても差支えない。Next, during the turning of the log, it may be necessary to interrupt the turning due to factors such as damage to the cutting tool. Therefore, the operation of each mechanism is performed based on a driver's interrupt signal or the like. Are desirably controlled so that they can be stopped simultaneously or individually. Also, apart from the present invention, a configuration may be adopted in which the thickness of the veneer to be cut can be controlled by a conventional procedure in the process of turning a log.
【００３０】次に、原木の旋削を終えて新たな旋削を待
機させる際に、待機期間が比較的短い場合には、外周駆
動機構の駆動を一時休止せずに継続するよう制御して差
支えなく、また例えば「ベニヤレースにおける原木の切
削方法」（特公平２−５４２０２号公報）に開示される
如く、原木の軸心部分に穿設した中心孔にスピンドルを
挿入して支持する場合には、原木回転機構の駆動をも一
時休止せずに継続するよう制御しても差支えない。Next, when waiting for a new turning after finishing the turning of the raw wood, if the waiting period is relatively short, it is possible to control the driving of the outer peripheral drive mechanism so as to continue without suspending. Also, as disclosed in, for example, "Method of Cutting Logs in Veneer Lace" (Japanese Patent Publication No. 2-54202), when a spindle is inserted and supported in a center hole formed in the axial center of a log, The driving of the log rotation mechanism may be controlled so as to be continued without pause.
【００３１】但し、本発明の実施に用いるベニヤレース
の本体としては、図示した実施例の形式に限るものでは
なく、図示は省略したが、従来公知の種々の形式のもの
に、所要構成の各機構を備えて用いることができ、要は
鉋台を歩送りする歩送り機構に無段可変速式の歩送り機
構を用いることと、バックアップロールを移動させる移
動機構にも無段可変速式の移動機構を用いることが充足
されれば、種々の形式のベニヤレースに於て本発明を実
施することが可能であって、所要構成の各機構の形態に
ついても特に制約はない。However, the main body of the veneer lace used for carrying out the present invention is not limited to the form of the illustrated embodiment, and is not shown. It can be used with a mechanism. The point is to use a stepless variable speed type stepping mechanism for the stepping mechanism for stepping the plane table and a stepless variable speed type moving mechanism for moving the backup roll. If the use of the mechanism is satisfied, the present invention can be implemented in various types of veneer laces, and there is no particular limitation on the form of each required mechanism.
【００３２】即ち、前記実施例に例示する如きボールネ
ジ等から成る移動ネジとサーボモータ等から成る可変速
駆動源との組合わせで成る機構に代えて、例えば油圧ポ
ンプ等の油圧源から油圧シリンダーへ流入させる油量を
サーボ弁を介して調整することにより、油圧シリンダー
の作動を所望通りに調節する油圧サーボ機構を備えても
差支えなく、要は無段階に所望速度が選択できる機構で
あれば、歩送り機構及び移動機構のいずれにも適用可能
である。That is, instead of a mechanism consisting of a combination of a moving screw composed of a ball screw or the like and a variable speed drive source composed of a servomotor or the like as shown in the above-mentioned embodiment, for example, a hydraulic source such as a hydraulic pump is used to move from a hydraulic source to a hydraulic cylinder. By adjusting the amount of oil to be flowed in through a servo valve, a hydraulic servo mechanism that adjusts the operation of the hydraulic cylinder as desired can be provided. The present invention can be applied to both the stepping mechanism and the moving mechanism.
【００３３】従って、例えば前記油圧サーボ機構を備え
る場合は、サーボ弁の制御が必要となり、或は例えば外
周駆動機構を有しない形式のものでは、外周駆動機構の
制御が不要となるなど、適用する形式に応じて、制御形
態を変えるのは当然であり、要は制御装置としては少な
くとも、原木を旋削する途上で削成する単板の厚さを変
更する際に、歩送り機構による鉋台の歩送り速度を、現
行速度から別の所望速度へ間断なく変更すると共に、該
歩送り速度の変更に遅延的に追従させて、移動機構によ
るバックアップロールの移動速度を、先に変更した歩送
り速度に準ずる移動速度へ変更するよう制御できれば足
りる。Therefore, for example, when the hydraulic servo mechanism is provided, control of the servo valve is required. For example, in a type having no outer peripheral drive mechanism, control of the outer peripheral drive mechanism becomes unnecessary. It is natural that the control mode is changed according to the type, and the point is that at least when changing the thickness of the veneer to be cut in the course of turning the raw wood, the step of the plane table by the step feed mechanism is required. The feed speed is continuously changed from the current speed to another desired speed, and the change in the feed speed is made to follow the change in the feed speed with a delay, so that the moving speed of the backup roll by the moving mechanism is changed to the previously changed feed speed. It suffices if it can be controlled to change to the same moving speed.
【００３４】また、バックアップロールは、図示実施例
の如く可及的に単純な構造とし、直接原木求芯方向へ移
動させれば、制御が比較的容易であるが、特に限定する
ものではなく、例えば必要に応じて、所望のバックアッ
プロールを軸心方向に於て複数に分割して支持したり、
或は例えば鉋台に対して対称的に移動するメインバック
アップロールの斜め下方に附随的にサブバックアップロ
ールを付設し、メインバックアップロール用の主移動機
構によって、メインバックアップロールと平行方向へ附
随的に移動させつつ、別途に備えた副移動機構によって
原木求心方向に準ずる方向へも個別に移動させる等々、
本数・長さ・支持形態・移動方向等について格別な制約
はない。The backup roll has a structure as simple as possible as shown in the illustrated embodiment, and is relatively easy to control if it is moved directly in the centering direction of the log. However, it is not particularly limited. For example, if necessary, a desired backup roll is divided into a plurality in the axial direction and supported,
Alternatively, for example, a sub-backup roll is optionally attached diagonally below the main backup roll that moves symmetrically with respect to the plane table, and is optionally moved in a direction parallel to the main backup roll by the main movement mechanism for the main backup roll. While moving separately in a direction similar to the log centripetal direction by a separately provided auxiliary movement mechanism, etc.
There is no particular restriction on the number, length, support form, moving direction, etc.
【００３５】勿論、いずれかのバックアップロールの移
動方向が、原木求心方向とは一致せず、原木径の大小に
よって、原木に当接する箇所が変位する場合には、原木
径の大小に拘らず、移動速度（つまり、原木一回転当り
に対する原木求心方向への移送量）が定量化するよう、
原木求心方向以外の方向への速度を補正する制御の外
に、移動速度の変更を遅延させる期間を補正する制御が
必要となるが、補正の態様は毎回同じ繰返しであるから
制御に特に困難性はない。Of course, if the direction of movement of any of the backup rolls does not coincide with the centering direction of the log, and if the location of contact with the log is displaced by the size of the log, regardless of the size of the log, To quantify the moving speed (that is, the amount of transfer of the log in the centripetal direction per rotation of the log),
In addition to the control to correct the speed in the direction other than the logarithmic centripetal direction, a control to correct the period for delaying the change of the moving speed is necessary, but the control is particularly difficult because the mode of correction is the same every time. There is no.
【００３６】また、本発明自体には直接関係ないが、附
随的に関連する技術として、削成する単板の厚さの変更
に対応させて、刃物の刃先とプレッシャーバーの刃口端
との間隔を調整する技術が挙げられ、一般的には、歩送
り速度の変更に即応的に追従させて、プレッシャーバー
台を進退させ、前記間隔の調整を行うのが好ましいこと
は明らかであるが、少なくとも図示実施例の如く、刃口
端が弾性変位自在なプレッシャーバーを用いる場合に
は、必ずしも厳密に即応的に追従させて間隔の調整を行
なわずとも、略式的に概ね同期させて間隔の調整を行う
だけで、若干の誤差は弾性が吸収許容するので実用上格
別支障なく、斯様な略式的な調整で足りれば、プレッシ
ャーバー台の進退機構に、定速式の進退機構を用いるこ
とができ、而も該進退機構の制御も単純化し得るので、
設備費の低減には有益である。Although not directly related to the present invention per se, as a related technique, the cutting edge of the cutting tool and the cutting edge of the pressure bar are moved in accordance with a change in the thickness of the veneer to be cut. Techniques for adjusting the interval are mentioned, and in general, it is clear that it is preferable to adjust the interval by moving the pressure bar base immediately following the change in the stepping speed, In the case of using a pressure bar in which the blade edge is elastically displaceable as in at least the illustrated embodiment, it is not necessary to adjust the interval in a strictly responsive manner, and to adjust the interval in a substantially synchronized manner. In this case, a slight error can be absorbed by the elasticity, so there is no particular problem in practical use.If such a schematic adjustment is sufficient, use a constant-speed type reciprocating mechanism for the reciprocating mechanism of the pressure bar base. Can be created Since also control of the mechanism can be simplified,
This is beneficial for reducing equipment costs.
【００３７】[0037]
【発明の効果】以上明らかな如く、本発明によれば、原
木の旋削を継続しつつ、削成する単板の厚さを無段階状
に変更する場合にも、原木を過不足なくバックアップし
て、原木の撓み・振動等を必要十分に予防することがで
き、総じて原木を可及的細径にまで能率良く旋削するこ
とが可能となる。As is apparent from the above, according to the present invention, even when the thickness of the veneer to be cut is changed steplessly while continuing the turning of the log, the log is backed up without excess or shortage. Therefore, it is possible to prevent the warp and vibration of the log, and the like, as necessary, and it is possible to efficiently turn the log to the smallest possible diameter as a whole.
【図１】本発明の実施に用いるベニヤレースの側面説明
図である。FIG. 1 is an explanatory side view of a veneer race used for carrying out the present invention.
【図２】図１に例示したベニヤレースの動作説明図であ
る。FIG. 2 is an operation explanatory view of the veneer race illustrated in FIG. 1;
１‥鉋台 ２‥プレッシャバー台 ３‥外周駆動機構 ４‥刃物 ５‥歩送り機構 ６‥バックアップロール ８‥移動機構 ９‥原木回転機構 １０‥原木 １１‥単板 １２‥スピンドル １３‥制御装置 1 Plane table 2 Pressure bar table 3 Peripheral drive mechanism 4 Cutting tool 5 Feeding mechanism 6 Backup roll 8 Moving mechanism 9 Log rotation mechanism 10 Log 11 Solid board 12 Spindle 13 Controller
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B27L 5/02 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) B27L 5/02
Claims (1)
速式の歩送り機構を用いると共に、バックアップロール
を移動させる移動機構にも無段可変速式の移動機構を用
い、原木を旋削する途上に於て、前記歩送り機構による
鉋台の歩送り速度を現行速度から別の所望速度へ間断な
く変更し、原木の旋削を継続しつつ、削成するベニヤ単
板の厚さを無段階状に変更する場合に、前記歩送り速度
の変更に遅延的に追従させて、前記移動機構によるバッ
クアップロールの移動速度を変更することを特徴とする
ベニヤレースに於ける原木の旋削方法。1. A stepless variable speed type stepping mechanism is used as a stepping mechanism for stepping a plane table, and a stepless variable speed type moving mechanism is also used as a moving mechanism for moving a backup roll. On the way, the feed speed of the plane table by the feed mechanism is continuously changed from the current speed to another desired speed, and while the turning of the log is continued, the thickness of the veneer veneer to be cut is steplessly changed. A method of turning a log in a veneer race, comprising changing the moving speed of a backup roll by the moving mechanism by delaying the change of the stepping speed and changing the moving speed of a backup roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18305392A JP3207250B2 (en) | 1992-06-16 | 1992-06-16 | Turning method of raw wood in veneer lace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18305392A JP3207250B2 (en) | 1992-06-16 | 1992-06-16 | Turning method of raw wood in veneer lace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05345302A JPH05345302A (en) | 1993-12-27 |
| JP3207250B2 true JP3207250B2 (en) | 2001-09-10 |
Family
ID=16128918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18305392A Expired - Fee Related JP3207250B2 (en) | 1992-06-16 | 1992-06-16 | Turning method of raw wood in veneer lace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3207250B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340873B2 (en) | 2000-03-29 | 2002-01-22 | Hitachi, Ltd. | Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus |
-
1992
- 1992-06-16 JP JP18305392A patent/JP3207250B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340873B2 (en) | 2000-03-29 | 2002-01-22 | Hitachi, Ltd. | Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus |
| US6344721B2 (en) | 2000-03-29 | 2002-02-05 | Hitachi, Ltd. | Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus |
| US6563286B2 (en) | 2000-03-29 | 2003-05-13 | Hitachi, Ltd. | Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05345302A (en) | 1993-12-27 |
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