JP3120252B2 - Method of pressing backup roll in veneer - Google Patents

Method of pressing backup roll in veneer

Info

Publication number
JP3120252B2
JP3120252B2 JP03313285A JP31328591A JP3120252B2 JP 3120252 B2 JP3120252 B2 JP 3120252B2 JP 03313285 A JP03313285 A JP 03313285A JP 31328591 A JP31328591 A JP 31328591A JP 3120252 B2 JP3120252 B2 JP 3120252B2
Authority
JP
Japan
Prior art keywords
log
backup roll
veneer
cutting
pressure
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
Application number
JP03313285A
Other languages
Japanese (ja)
Other versions
JPH05124013A (en
Inventor
賢市 平岩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meinan Machinery Works Inc
Original Assignee
Meinan Machinery Works Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meinan Machinery Works Inc filed Critical Meinan Machinery Works Inc
Priority to JP03313285A priority Critical patent/JP3120252B2/en
Publication of JPH05124013A publication Critical patent/JPH05124013A/en
Application granted granted Critical
Publication of JP3120252B2 publication Critical patent/JP3120252B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、原木を回転させつつ刃
物により単板を切削するベニヤレ−スにおける、バック
アップロ−ルを回転中の原木に圧接して切削中の原木の
撓みを防止するバックアップロールの加圧方法に関す
る。
The present invention relates to a Beniyare cutting the veneer by knife while rotating the timber - in scan back
The present invention relates to a backup roll pressurizing method in which an up roll is pressed against a rotating log to prevent bending of the log during cutting.

【0002】[0002]

【従来技術】従来、バックアップロールを原木に圧接す
る場合は、実公昭57−2093号公報に記載されてい
るように、原木が円形になった時点で原木の回転を止め
ることなく、一定の加圧力に設定されたエア−シリンダ
−によりバックアップロールを原木の外周面に接触させ
て行なっていた。これは原木が切削されて小径となるに
つれて刃物等から受ける力により原木が大きく撓んでし
まうことで、切削された単板の厚さが設定の厚さからず
れてしまうことを防止するために、刃物等から受ける力
に見合う力を刃物等に相対する箇所に加え、原木の撓み
をできるだけ小とするものである。
2. Description of the Related Art Conventionally, when a backup roll is pressed against a log, as described in Japanese Utility Model Publication No. 57-2093, the rotation of the log is stopped without stopping when the log becomes circular. The backup roll is brought into contact with the outer peripheral surface of the raw wood by an air cylinder set to a pressure. This is to prevent the thickness of the cut veneer from deviating from the set thickness, because the raw wood is largely bent by the force received from the cutting tool etc. as the raw wood is cut and becomes a small diameter, A force commensurate with the force received from the blade or the like is applied to a portion facing the blade or the like, and the deflection of the log is minimized.

【0003】[0003]

【発明が解決しようとする課題】しかしこのような加圧
方法では、原木が大径である状態でバックアップロール
が原木に圧接される場合は、刃物等から受ける力によっ
て原木が撓む量が小であるため、最初から刃物等から受
ける力に見合う加圧力に設定されたバックアップ ロール
を圧接することで原木がほぼ撓みの無い状態となって
も、圧接されてから撓みがほぼ無い状態となるまでの原
木の回転で切削された単板の厚さは許容範囲に入るもの
であったが、間伐材等の小径の原木を切削する場合は次
のような問題があったのである。即ち、小径の原木の切
削では、バックアップロールを圧接する前は、刃物等か
ら受ける力によって撓んでいる量が大径の場合に比べて
大となっているが、この状態で最初から刃物等から受け
る力に見合う加圧力に設定されたバックアップロール
圧接すると、急激に原木の撓み量がほとんど無い状態と
なるが、圧接されてから撓みがほぼ無い状態となるまで
の原木の回転で切削された単板の厚さは、許容範囲を
ずれたものとなり、歩留りを低下させる原因となってい
た。
However, in such a pressing method, when the backup roll is pressed against the log in a state where the log has a large diameter, the log is bent by a force received from a cutting tool or the like. The backing roll is set to a pressing force that matches the force received from the blade etc. from the beginning. The thickness of the veneer cut by rotation of the raw wood until there was almost no deflection was within the allowable range.However, when cutting small-diameter raw wood such as thinned wood, the following problems occurred. There was. In other words, in cutting small-diameter raw wood, before pressing the backup roll , the amount of deflection due to the force received from the blade or the like is larger than in the case of the large-diameter blade. When a backup roll set to a pressing force commensurate with the received force is pressed against it, the amount of deflection of the raw wood suddenly becomes almost nil, but it was cut by rotation of the raw wood until it became almost free from bending after being pressed. the thickness of the veneer, the tolerance
As a result, the yield was reduced.

【0004】[0004]

【課題を解決するための手段】本発明はこれら問題を解
決するために、ベニヤレ−スによって原木を切削するに
際し、原木がほぼ円柱状に切削されるまでバックアップ
ロールによる原木外周への加圧を行わず、ほぼ円柱状に
切削された後においてバックアップロールの原木外周へ
の加圧を開始すると共に、その加圧力を所定の加圧力に
到達するまで漸次増大させつつ切削することを特徴とす
ものである。ここに漸次とは加圧力の増大速度をゆっ
くりと行うことをいい、特にその増大速度が一定である
ことが望ましく、また所定の加圧力とは刃物等により
じる原木の撓みをほぼなくした時の加圧力をいうもので
ある。
SUMMARY OF THE INVENTION In order to solve these problems, the present invention provides a method for cutting a log with a veneer.
Back up until the log is cut into a substantially cylindrical shape
It is almost cylindrical without applying pressure to the outer circumference of the log with rolls.
After cutting, to the outer circumference of the backup roll log
And pressurizing the pressure to the specified pressure.
It is characterized by cutting while gradually increasing until it reaches
It is those that. Here, "gradually" means that the pressing force is slowly increased, and it is particularly desirable that the increasing speed is constant, and that the predetermined pressing force is the deflection of the raw wood caused by a blade or the like. Is the pressure when the pressure is almost eliminated.

【0005】[0005]

【作用】その結果、小径の原木の切削では、バックアッ
プロールを圧接する前に刃物等から受ける力によって撓
んでいた量が、バックアップロールの加圧力が漸次所定
の値まで増大することにより時間を掛けて徐々に減少
し、この間の原木は前記に比べて多く回転し、回転に応
じて単板が生産され、撓んでいた量が多くの単板に分散
されるため、単板1枚当りの厚さの誤差が許容範囲に入
り、有効なものとなって歩留りが向上するのである。
[Action] As a result, in the small-diameter wood cutting, backup
The amount that has been bent by the force received from the blade or the like before pressing the rolls gradually decreases over time due to the pressurizing force of the backup roll gradually increasing to a predetermined value, and the log during this time is compared to the above. It rotates many times, and the veneer is produced according to the rotation, and the amount of warping is distributed to many veneers, so the thickness error per veneer falls within the allowable range and becomes effective. The yield is improved.

【0006】[0006]

【実施例】図1に示すように、スピンドル1に回転可能
に支持された原木2を切削する刃物3を備えた鉋台4
と、鉋台4と一体的に設けた支持台(図示せず)に刃物
3の刃先と平行な方向に間隔をおいてノ−ズバ−5と、
隣接するノ−ズバ−5の間に周囲に突起部を有する駆動
回転体6とを備え、鉋台及び支持台を原木の回転につれ
て移動させる送りネジ7を設ける。また、両端がシリン
ダ−8のロッド9の先端に従動回転自在に保持され、且
つガイド(図示せず)により案内され原木2に対し直線
的に前進後退可能で、原木2と同じ長さのバックアップ
ロ−ル10を、原木2において鉋台4と反対の箇所に配
置する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a plane table 4 having a cutting tool 3 for cutting a log 2 rotatably supported on a spindle 1.
A nose bar 5 on a support table (not shown) provided integrally with the plane table 4 at a distance in a direction parallel to the cutting edge of the blade 3;
A drive rotary member 6 having a protrusion around the adjacent nose bar 5 is provided, and a feed screw 7 for moving the plane table and the support table as the log is rotated is provided. Further, both ends are rotatably held by the tip of the rod 9 of the cylinder 8 and are guided by a guide (not shown) so as to be able to linearly advance and retreat with respect to the log 2, and have the same length as the log 2. The roll 10 is arranged on the log 2 at a position opposite to the plane table 4.

【0007】バックアップロ−ル10を作動させるため
のシリンダ−8には、図2に概略的に示すように、配管
する。即ち、コンプレッサ−11より切換弁12を介
し、一方側にはパイロット形減圧弁13を介して4方口
14に配管する。4方口14の2つの口からは、シリン
ダ−8に各々配管する一方、4方口14の残りの口から
は速度制御弁15を介してパイロット形減圧弁13にパ
イロット圧として接続配管する。ここでパイロット形減
圧弁13から4方口14に排出される空気は、最初は低
い圧力であり、パイロット圧で切換弁が作動させられる
と、高い圧力の空気が供給される。また、切換弁12の
他方側には減圧弁16を介してシリンダ−8に各々接続
し、バックアップロ−ル10を原木2から遠ざかるため
の配管とする。切換弁12の切換え動作は運転者が手動
で行なうものとする。
[0007] As shown schematically in FIG. 2, piping is provided in a cylinder 8 for operating the backup roll 10. That is, the compressor 11 is connected to the four-way port 14 via the switching valve 12, and on one side via the pilot pressure reducing valve 13. From the two ports of the four-way port 14, pipes are respectively connected to the cylinders 8, while the remaining ports of the four-way port 14 are connected to the pilot-type pressure reducing valve 13 via the speed control valve 15 as pilot pressure. Here, the air discharged from the pilot-type pressure reducing valve 13 to the four-way port 14 has a low pressure at first, and when the switching valve is operated with the pilot pressure, air at a high pressure is supplied. The other side of the switching valve 12 is connected to a cylinder 8 via a pressure reducing valve 16 to provide a pipe for moving the backup roll 10 away from the log 2. The switching operation of the switching valve 12 is performed manually by the driver.

【0008】本発明の実施例は以上のように備えるもの
で、以下のように作動される。最初に、切換弁12を切
換えることでコンプレッサ−11の圧縮空気(以下空気
という)を減圧弁16側に誘導し、シリンダ−8のロッ
ド9を後退させて図1の一点鎖線で示すように、バック
アップロ−ル10を原木2から離れた位置に待機させて
おく。この状態で、スピンドル1により回転させられる
小径の原木2に対し、公知のベニヤレ−スと同様に、鉋
台4及び支持台を送りネジ7の回転により漸次接近させ
ていき原木2を切削し単板を生産するが、原木2は小径
であるため、刃物等から受ける力によって大きく撓んで
しまう。次いで、回転する原木2が円柱状となってか
ら、切削を中断せずに運転者が切換弁12をパイロット
形減圧弁13側へ切換えると、低い圧力の空気は4方口
14を経て両シリンダ−8及び速度制御弁15へと流れ
ていく。そこでシリンダ−8のロッド9が前進してバッ
クアップロ−ル10が原木2に向って進んで行くが、バ
ックアップロ−ル10が原木2に当たるまでは、シリン
ダ−8内の空気が供給される側の容積が漸次増え続ける
ため、パイロット形減圧弁13から両シリンダ−8及び
速度制御弁15に至る間では空気の圧力が設定した値に
達っせず、速度制御弁15を通過してパイロット圧とし
てパイロット形減圧弁13に流れる空気の量は少ない。
その結果、パイロット形減圧弁13は圧力切換弁が作動
せず、パイロット形減圧弁13から供給される空気の圧
力は変らない。
[0008] The embodiment of the present invention is provided as described above, and operates as follows. First, by switching the switching valve 12, the compressed air (hereinafter referred to as air) of the compressor 11 is guided to the pressure reducing valve 16 side, and the rod 9 of the cylinder 8 is retracted, as shown by the one-dot chain line in FIG. The backup roll 10 is kept at a position away from the log 2. In this state, the plane table 4 and the support table are gradually approached to the small-diameter log 2 rotated by the spindle 1 by rotating the feed screw 7 in the same manner as in a known veneer, and the log 2 is cut. However, since the log 2 has a small diameter, it is largely bent by a force received from a cutting tool or the like. Next, after the rotating log 2 becomes cylindrical, if the driver switches the switching valve 12 to the pilot pressure reducing valve 13 without interrupting the cutting, low-pressure air flows through the four-way port 14 to both cylinders. -8 and flow to the speed control valve 15. Then, the rod 9 of the cylinder 8 moves forward, and the backup roll 10 advances toward the log 2. The side to which the air in the cylinder 8 is supplied until the backup roll 10 hits the log 2. The pressure of the air does not reach the set value between the pilot pressure reducing valve 13 and the two cylinders 8 and the speed control valve 15 because the volume of the air continues to increase gradually. The amount of air flowing through the pilot type pressure reducing valve 13 is small.
As a result, the pressure switching valve of the pilot pressure reducing valve 13 does not operate, and the pressure of the air supplied from the pilot pressure reducing valve 13 does not change.

【0009】次いでバックアップロ−ル10が回転する
原木2に当たると従動回転し始めるが、シリンダ−8内
の前記容積は変化しないため、パイロット形減圧弁13
から両シリンダ−8及び速度制御弁15に至る間の空気
の圧力が設定した値となり、原木2を小さい力(初圧)
で加圧する。一方、空気の圧力が設定した値となること
によって、速度制御弁15を通過する空気の量が増え続
け、やがてパイロット圧となってパイロット形減圧弁1
3の圧力切換弁が作動し、パイロット形減圧弁13から
排出される圧力が設定された高い値となる。しかしシリ
ンダ−8内の圧力が設定された値となるまでには若干の
時間を要するため、バックアップロ−ル10が原木を加
圧する力は、前記時間の間で漸次増大し設定した値(終
圧)となる。例えば、長さ3尺の原木2に対するバック
アップロ−ル10の加圧力は、最初は小さい力、約70
kg(初圧)で圧接させ、圧接した後に若干の時間、約
3.5秒をかけて設定値、約1000kg(終圧)まで増
大することとなり、バックアップロ−ル10を圧接する
前の原木の撓み量が、前記時間をかけてほとんど無い状
態となるのである。その結果、前記時間で原木2は数回
転する。通常ベニヤレ−スでは切削速度(原木外周の速
度)を一定とするために、原木の直径が小となるにつれ
て原木の回転数を増大させており、例えば、原木径が4
50mm前後では3〜5回転、原木径が200mm前後では
6〜10回転する。これらの回転数に応じて単板が生産
され、撓んでいた量が多くの単板に分散されて切削され
るため、この時の単板1枚当りの厚さは設定の厚さより
若干厚くなるものの許容範囲に入り、有効なものとなっ
て歩留りが向上するのである。更に切削を続け、終了す
ると鉋台4及び支持台を後退させ且つ切換弁12を切換
えることでコンプレッサ−11の空気減圧弁16側に誘
導し、シリンダ−8のロッド9を後退させて、バックア
ップロ−ル10を原木2から離し原位置に復帰させる。
Next, when the backup roll 10 hits the rotating log 2, it starts to rotate, but the volume in the cylinder 8 does not change.
The pressure of the air between the cylinder and the two cylinders 8 and the speed control valve 15 becomes the set value, and the log 2 exerts a small force (initial pressure).
And pressurize. On the other hand, when the pressure of the air becomes the set value, the amount of air passing through the speed control valve 15 continues to increase, and eventually becomes the pilot pressure, and the pilot pressure reducing valve 1
The pressure switching valve No. 3 is operated, and the pressure discharged from the pilot pressure reducing valve 13 becomes a set high value. However, since it takes some time for the pressure in the cylinder 8 to reach the set value, the force with which the backup roll 10 presses the log is gradually increased during the time and increases to the set value (end). Pressure). For example, the pressing force of the backup roll 10 on the log 2 having a length of 3 is initially small, about 70.
The pressure is increased to the set value, approximately 1000 kg (final pressure), over a period of about 3.5 seconds after pressing, and the log before pressing the backup roll 10 is pressed. Is almost non-existent over the above-mentioned time. As a result, the log 2 rotates several times in the time. Usually, in a veneer, in order to keep the cutting speed (the speed of the outer periphery of the log) constant, the number of rotations of the log is increased as the diameter of the log becomes smaller.
It rotates 3 to 5 times around 50 mm, and 6 to 10 times when the log diameter is around 200 mm. The veneers are produced in accordance with these rotation speeds, and the amount of warping is dispersed and cut into many veneers, so the thickness per veneer at this time is slightly larger than the set thickness. It is within the allowable range, becomes effective and improves the yield. Further cutting is continued. When the cutting is completed, the plane table 4 and the support table are retracted, and the switching valve 12 is switched to guide the compressor 11 to the air pressure reducing valve 16 side, and the rod 9 of the cylinder 8 is retracted, so that the backup roller is moved. The tool 10 is separated from the log 2 and returned to the original position.

【0010】上記においてバックアップロ−ル10が原
木2に圧接されてから加圧力が増大して設定値になるま
での時間Sにバックアップロ−ル10が移動する量は、
切削中の原木の径に対応して予め設定された時間当りの
平均の原木の回転数を、予め設定された原木1回転当
りの鉋台の移動量(予め設定された単板の厚さ)をt、
バックアップロ−ル10を圧接する前の原木の撓み量を
Lとすると、NSt+Lとなり、前記時間Sでのバック
アップロ−ル10の移動速度を一定と仮定すると、時間
Sで切削される単板の厚さは、(NSt+L)÷NSと
なる。即ち、設定された単板の厚さtに対し、原木の撓
み量Lを回転数NSで割った値(Δt)だけ単板が厚く
なるのである。ここで単位時間の平均回転数Nは前記の
ようにベニヤレ−スで予め設定されているため、Δtは
時間Sによって変化し、その関係は図5のようになり、
バックアップロ−ル10の加圧力が最初から所定の加圧
力に近く増大するように設定されている従来の方法では
時間Sが短いためΔtが大となるが、前記のように加圧
力の増大速度を制御すると、時間Sが長くなりΔtが小
となり許容範囲の値となるのである。
In the above description, the amount of movement of the backup roll 10 during the time S from the time when the backup roll 10 is pressed against the log 2 to the time when the pressing force increases and reaches the set value is as follows.
The average number of rotations of the raw wood per time set in advance corresponding to the diameter of the raw wood being cut is N , and the predetermined amount of movement of the plane table per rotation of the raw wood (preset veneer thickness). To t,
Assuming that the amount of deflection of the raw wood before pressing the backup roll 10 is L, NSt + L is obtained. Assuming that the moving speed of the backup roll 10 at the time S is constant, a single plate cut at the time S is obtained. The thickness is (NSt + L) ÷ NS. That is, the veneer becomes thicker by a value (Δt) obtained by dividing the amount of deflection L of the log by the rotation speed NS with respect to the set thickness t of the veneer. Here, since the average rotation speed N per unit time is preset in veneer as described above, Δt changes with time S, and the relationship is as shown in FIG.
In the conventional method in which the pressurizing force of the backup roll 10 is set to increase near the predetermined pressing force from the beginning, the time S is short and the Δt becomes large because the time S is short. Is controlled, the time S becomes longer, Δt becomes smaller, and becomes a value within the allowable range.

【0011】本発明の第2の実施例としては、前記実施
例でバックアップロ−ル10を原木に向けて前進後退さ
せる作動部材を、変更したものである。即ち、バックア
ップロール27の片側軸受けにおける部分平面図である
図3及び図3におけるXYにおける部分断面図である図
4に示すように、ベニヤレ−スの原木(図示せず)に向
う方向に連なり送りネジ7と同じピッチのネジが形成さ
れた2本の雄ネジ20(図では1本のみを示す)に雌ネ
ジ21をバックアップロール27の両端に各々備え、両
雌ネジ21、21に基台22を架け渡して固定し、雄ネ
ジ20の回転により原木に向う方向に前後動自在とす
る。この基台22上で雌ネジ21に近い箇所に各々取付
台23を設け、取付台23に各々シリンダ−24の終端
部を取付ける。一方シリンダ−24のピストンロッド2
5の先端には軸受26を設け、軸受26にはバックアッ
プロ−ル27の軸28を挿入しバックアップロ−ル27
を従動回転自在に支持する。また、バックアップロ−ル
27が常に原木の中心に向う方向のみで前進後退するよ
うに案内するために、軸28の更に外側の箇所を長方形
のブロック29に設けた軸受(図示せず)に挿入し、雄
ネジ20と平行に連なるコ型のガイド30でブロック2
9を上下から挟持し、摺動することで移動自在とする。
一方、雄ネジ20はベニヤレ−スの鉋台4及び支持台を
移動させる送りネジ7と原木切削時は同期できるように
構成する。尚、バックアップロ−ル27を作動させるた
めのシリンダ−24には、図2に示したものと同様の配
管をし、ベニヤレ−スの構成も同様とする。また、原木
を切削する際は、シリンダ−24のロッド25を縮めた
状態で原木と鉋台4の刃物3との距離より若干長い距離
をおいた位置にバックアップロ−ル27があるように、
予め雄ネジ20の回転で基台22を移動させておく。
In the second embodiment of the present invention, the operation member for moving the backup roll 10 forward and backward toward the log in the above embodiment is changed. That is, as shown in FIG. 3 which is a partial plan view of the one-sided bearing of the backup roll 27 and FIG. 4 which is a partial cross-sectional view taken along the line XY of FIG. Two male screws 20 (only one is shown in the figure) formed with screws having the same pitch as the screw 7 are provided with female screws 21 at both ends of the backup roll 27. Is fixed to the base material, and the male screw 20 is rotated so as to be movable back and forth in the direction toward the log. Attachment bases 23 are provided on the base 22 at locations close to the female screws 21, and the terminal ends of the cylinders 24 are attached to the attachment bases 23. On the other hand, the piston rod 2 of the cylinder 24
5 is provided with a bearing 26 at the tip thereof, into which a shaft 28 of a backup roll 27 is inserted.
Is rotatably driven. Further, in order to guide the backup roll 27 so that it always advances and retreats only in the direction toward the center of the log, a portion outside the shaft 28 is inserted into a bearing (not shown) provided on the rectangular block 29. Then, the block 2 is formed by a U-shaped guide 30 which is connected in parallel with the male screw 20.
9 is vertically movable and slidable.
On the other hand, the male screw 20 is configured so that it can be synchronized with the feed screw 7 for moving the plane table 4 and the support table of the veneer when cutting a log. A cylinder similar to that shown in FIG. 2 is provided for the cylinder 24 for operating the backup roll 27, and the configuration of the veneer rail is the same. When cutting the log, the backup roll 27 is located at a position slightly longer than the distance between the log and the blade 3 of the plane table 4 with the rod 25 of the cylinder 24 contracted.
The base 22 is moved by rotating the male screw 20 in advance.

【0012】第2の実施例は以上のように備えるもの
で、原木を切削するべく送りネジ7を回転させ鉋台4及
び支持台を移動させると共に送りネジ7と同期して雄ネ
ジ20も同じ回転数で送りねじ7とは逆方向に回転させ
る。そこで鉋台4及び支持台は原木に向って進み又、基
台22に備えたバックアップロ−ル27もガイド30の
案内により原木に向って進み、刃物3によって原木の切
削が行なわれるが、バックアップロ−ル27は前記の位
置に備えたので原木から若干離れた位置を保ちつつ移動
する。原木の切削が進み、切削され回転する原木が円柱
状となると、第1の実施例と同様に、切削を中断せずに
運転者が切換弁12をパイロット形減圧弁13側へ切換
えると、バックアップロ−ル27が原木2に向って進ん
で行くが、前記のようにバックアップロ−ル27は原木
から若干離れた位置にあるため即座に原木に当接し、以
下第1の実施例と同様の作用でバックアップロ−ル27
が原木を加圧する力が変化して原木が切削されるのであ
る。以上のように第2の実施例では、必要な時に即座に
バックアップロ−ル27を作用させることができ、より
多くの良好な単板を得ることができるとともに、シリン
ダ−24のストロ−クが短いものですむ。また前記実施
例とは別に、バックアップロ−ルを移動させるシリンダ
−に備えた減圧弁を、原木が円柱状となった後に、手動
により最初低い圧力として原木に当接させ次いで同じく
手動により漸次加圧力を増大させてもよい。
The second embodiment is provided as described above. The feed screw 7 is rotated to cut the log, the plane table 4 and the support table are moved, and the male screw 20 is also rotated in synchronization with the feed screw 7. The screw is rotated in the direction opposite to the feed screw 7 by a number. Then, the plane table 4 and the support table advance toward the log, and the backup roll 27 provided on the base 22 also advances toward the log under the guidance of the guide 30, and the cutting of the log is performed by the cutting tool 3. Since the reel 27 is provided at the above-mentioned position, it moves while maintaining a position slightly away from the log. When the cutting of the raw wood progresses and the cut and rotating raw wood becomes cylindrical, as in the first embodiment, when the driver switches the switching valve 12 to the pilot pressure reducing valve 13 without interrupting the cutting, the backup is performed. The roll 27 advances toward the log 2, but as described above, the backup roll 27 is slightly away from the log, so that the backup roll 27 immediately contacts the log, and the same as in the first embodiment. Backup roll 27 by action
However, the force that presses the log changes, and the log is cut. As described above, in the second embodiment, the backup roll 27 can be actuated immediately when necessary, so that more good single plates can be obtained, and the stroke of the cylinder 24 can be reduced. A short one is enough. In addition to the above embodiment, a pressure reducing valve provided on a cylinder for moving a backup roll is manually brought into contact with the raw wood at a low pressure first after the log becomes cylindrical, and then gradually applied manually. The pressure may be increased.

【0013】[0013]

【発明の効果】以上のように本発明によれば、小径の原
木を切削した場合に、バックアップロールを圧接する前
に刃物等から受ける力によって撓んでいた量が、バック
アップロールの加圧力が漸次所定の値まで増大すること
により時間を掛けて徐々に減少し、この間の原木の回転
回数が増加し、回転に応じて単板が生産され、撓んでい
た量が多くの単板に分散されるため、許容範囲内の単板
を多く得ることができ、歩留りが向上するもののであ
る。
According to the present invention as described above, according to the present invention, when cutting the small diameter logs, the amount that was deflected by the force from the tool or the like prior to pressing the backup roll, back
The pressure of the up roll gradually increases to a predetermined value and gradually decreases over time, the number of rotations of the log during this time increases, the veneer is produced according to the rotation, and the amount of warping is large. Therefore, a large number of veneers within the allowable range can be obtained, and the yield is improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係るバックアップロールの加圧方法に
よるベニヤレースの断面図である。
FIG. 1 is a cross-sectional view of a veneer lace according to a backup roll pressing method according to the present invention.

【図2】同バックアップロールの配管の説明図である。FIG. 2 is an explanatory diagram of piping of the backup roll.

【図3】バックアップロールの片側軸における部分平面
図である。
FIG. 3 is a partial plan view of one side axis of the backup roll.

【図4】図3におけるX−Y線の部分断面図である。FIG. 4 is a partial sectional view taken along line XY in FIG. 3;

【図5】加圧中に切削される単板の厚みについての説明
図。
FIG. 5 is a diagram illustrating the thickness of a veneer cut during pressurization.

【符号の説明】[Explanation of symbols]

1・・スピンドル、2・・原木、3・・刃物、4・・鉋
台、5・・ノーズバー、6・・駆動回転体、7・・送り
ねじ、8・・シリンダー、9・・ロッド、10・・バッ
クアップロール、11・・コンプレッサー、12・・切
替弁、13・・パイロット形減圧弁、14・・4方口、
15・・速度制御弁、16・・空気減圧弁。
1. Spindle, 2. Log, 3. Tool, 4. Plane table, 5. Nose bar, 6. Rotating body, 7. Feed screw, 8. Cylinder, 9. Rod, 10.・ Backup roll, 11 ・ ・ Compressor, 12 ・ ・ Switching valve, 13 ・ ・ Pilot type pressure reducing valve, 14 ・ ・ 4 port,
15 ··· Speed control valve, 16 ·· Air pressure reducing valve.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 ベニヤレ−スによって原木を切削するに
際し、原木がほぼ円柱状に切削されるまでバックアップ
ロールによる原木外周への加圧を行わず、ほぼ円柱状に
切削された後においてバックアップロールの原木外周へ
の加圧を開始すると共に、その加圧力を所定の加圧力に
到達するまで漸次増大させつつ切削することを特徴とす
るベニヤレ−スにおけるバックアップロールの加圧方
法。
1. A method for cutting a log with a veneer.
Back up until the log is cut into a substantially cylindrical shape
It is almost cylindrical without applying pressure to the outer circumference of the log with rolls.
After cutting, to the outer circumference of the backup roll log
And pressurizing the pressure to the specified pressure.
It is characterized by cutting while gradually increasing until it reaches
Method of pressurizing a backup roll in a veneer .
JP03313285A 1991-10-31 1991-10-31 Method of pressing backup roll in veneer Expired - Fee Related JP3120252B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03313285A JP3120252B2 (en) 1991-10-31 1991-10-31 Method of pressing backup roll in veneer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03313285A JP3120252B2 (en) 1991-10-31 1991-10-31 Method of pressing backup roll in veneer

Publications (2)

Publication Number Publication Date
JPH05124013A JPH05124013A (en) 1993-05-21
JP3120252B2 true JP3120252B2 (en) 2000-12-25

Family

ID=18039377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03313285A Expired - Fee Related JP3120252B2 (en) 1991-10-31 1991-10-31 Method of pressing backup roll in veneer

Country Status (1)

Country Link
JP (1) JP3120252B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004011596T2 (en) * 2003-12-24 2009-01-29 Meinan Machinery Works, Inc., Obu Veneer peeling machine and method of cutting a piece of wood by means of the veneer peeling machine

Also Published As

Publication number Publication date
JPH05124013A (en) 1993-05-21

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