JPS6355407B2 - - Google Patents

Info

Publication number
JPS6355407B2
JPS6355407B2 JP21804484A JP21804484A JPS6355407B2 JP S6355407 B2 JPS6355407 B2 JP S6355407B2 JP 21804484 A JP21804484 A JP 21804484A JP 21804484 A JP21804484 A JP 21804484A JP S6355407 B2 JPS6355407 B2 JP S6355407B2
Authority
JP
Japan
Prior art keywords
band saw
detector
circumferential speed
saw
blade
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
Application number
JP21804484A
Other languages
Japanese (ja)
Other versions
JPS6195815A (en
Inventor
Takao Oose
Masaaki Yamaguchi
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.)
Hitachi Koki Haramachi Co Ltd
Original Assignee
Hitachi Koki Haramachi Co Ltd
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 Hitachi Koki Haramachi Co Ltd filed Critical Hitachi Koki Haramachi Co Ltd
Priority to JP21804484A priority Critical patent/JPS6195815A/en
Publication of JPS6195815A publication Critical patent/JPS6195815A/en
Publication of JPS6355407B2 publication Critical patent/JPS6355407B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Description

【発明の詳細な説明】 本発明はバンドソーにおける帯鋸刃のピツチを
検出して、帯鋸の周速度を自動制御する周速度制
御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circumferential speed control device that detects the pitch of a band saw blade in a band saw and automatically controls the circumferential speed of the band saw.

バンドソーでは、被切断材の材質に応じて、最
適な帯鋸刃のピツチを有する帯鋸を使用し、被切
断材と帯鋸に適した周速度で切断作業を行うこと
により、切断作業効率、帯鋸の寿命、切断仕上り
面を向上できるものである。 Band saws use a band saw with the optimum band saw blade pitch depending on the material of the material to be cut, and cut at a circumferential speed that is appropriate for the material to be cut and the band saw. , it is possible to improve the finished cutting surface.

しかし、従来のバンドソーでは、被切断材の材
質に適した刃のピツチを有する帯鋸を選択し、且
つ最適とする帯鋸の周速度を手動操作により設定
をしたり、又調整をしていた。使用する帯鋸と最
適な周速度を把握し、周速度を設定したり、調整
することは厄介であり、又、周速度の設定や調整
を誤つた場合、被切断材の切断作業能巻、切断仕
上り面が悪化し、帯鋸の寿命が低下し、時には帯
鋸が折損するなどの問題があつた。 However, in the conventional band saw, a band saw having a blade pitch suitable for the material of the material to be cut is selected, and the optimum circumferential speed of the band saw is manually set or adjusted. It is troublesome to know the band saw to be used and the optimal circumferential speed, and to set and adjust the circumferential speed. Also, if the circumferential speed is set or adjusted incorrectly, the cutting operation of the material to be cut may be interrupted. There were problems such as the finished surface deteriorated, the life of the band saw was shortened, and the band saw sometimes broke.

本発明の目的は、上記した従来技術の欠点をな
くし、自動的に帯鋸刃のピツチを検出して、被切
断材と帯鋸に応じた最適な周速度制御を行い、切
断作業の能率、切断仕上り面を向上させ、且つ帯
鋸の折損を防止することである。 The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, automatically detect the pitch of the band saw blade, and perform optimal circumferential speed control according to the material to be cut and the band saw, thereby increasing the efficiency of cutting work and improving the cutting finish. The purpose is to improve the surface and prevent the band saw from breaking.

本発明は、バンドソーに装着した帯鋸刃のピツ
チを自動的に検出すべく、鋸身の適所に１個以上
の識別用のマークを設け、このマークの有無を検
出するよう検出部を配設し、又は帯鋸刃の凹凸を
直接検出するよう検出器を配設し、検出器からの
電気信号により帯鋸刃のピツチを判断して、帯鋸
を最適な周速度で回転させるよう、判断回路、周
速度指示回路、速度制御回路の構成を工夫したも
のである。 In order to automatically detect the pitch of a band saw blade attached to a band saw, the present invention provides one or more identification marks at appropriate locations on the saw blade, and a detection unit is arranged to detect the presence or absence of the marks. Or, a detector is arranged to directly detect the unevenness of the band saw blade, and a judgment circuit and circumferential speed are installed to determine the pitch of the band saw blade based on the electric signal from the detector and rotate the band saw at the optimum circumferential speed. The configuration of the instruction circuit and speed control circuit has been devised.

本発明の実施例を図を用いて説明する。第１図
は携帯用バンドソーの概略構成を示す正面図であ
る。本体に電動機１を備え、図示しない適当な減
速機構を介して、駆動ノコ車２を駆動する機構と
なつており、駆動ノコ車２に対向して、従動ノコ
車３を配設し、両ノコ車２，３により適当な張力
を加え、帯鋸４を装着し、ノコカバー５でカバー
している。スイツチ６を「ON」にすると、電動
機１が回転し、ノコ車２を介して帯鋸４が回転さ
れ、被切断材を切断できるようになる。 Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a portable band saw. The main body is equipped with an electric motor 1, and the drive saw wheel 2 is driven through an appropriate speed reduction mechanism (not shown).A driven saw wheel 3 is disposed opposite the driving saw wheel 2, and both saw wheels are Appropriate tension is applied to the wheels 2 and 3, and a band saw 4 is attached and covered with a saw cover 5. When the switch 6 is turned ON, the electric motor 1 rotates, and the band saw 4 is rotated via the saw wheel 2, so that the material to be cut can be cut.

ノコ車２，３に装着された帯鋸４の鋸身には、
帯鋸４の刃のピツチに応じ第２図に示すように識
別用マークとしての切欠部８を１個以上（第２図
においては３個の場合を示す。）を設けている。 The saw blade of the band saw 4 attached to the saw wheels 2 and 3 has
Depending on the pitch of the blades of the band saw 4, one or more cutouts 8 (three cutouts are shown in FIG. 2) are provided as identification marks, as shown in FIG.

この切欠部８を検出する検出機構部７がバンド
ソー本体の適所に、且つ帯鋸４の近傍に配設して
いる。検出機構７には切欠部８の有無を検出する
検出器１０が備えてある。この検出器１０は第４
図に示すように磁石１１、コイル１２、ポールピ
ース１３により構成され、第２図に示すように帯
鋸４から、わずかな距離隔て配設している。検出
器１０の原理は、磁気抵抗の増減により、ポール
ピース１３を通過する磁束が減増するために、コ
イル１２の両端に誘導電圧が発生するようにな
る。帯鋸４の材質は一般に磁性体であるため、帯
鋸４が回転すると、帯鋸４に設けた切欠部８の所
で磁気抵抗が増加するため、ポールピース１３を
通過する磁束が変化し、コイル１２の両端に誘導
電圧が発生する。この誘導電圧の波高値は、帯鋸
４の周速度に正比例し、帯鋸４とポールピース１
３の先端とのエアギヤツプに反比例するものであ
る。 A detection mechanism section 7 for detecting this notch 8 is disposed at a suitable location on the band saw body and near the band saw 4. The detection mechanism 7 is equipped with a detector 10 that detects the presence or absence of the notch 8. This detector 10 is the fourth
As shown in the figure, it is composed of a magnet 11, a coil 12, and a pole piece 13, and is arranged at a small distance from the band saw 4 as shown in FIG. The principle of the detector 10 is that as the magnetic resistance increases or decreases, the magnetic flux passing through the pole piece 13 decreases or increases, so that an induced voltage is generated across the coil 12. The material of the band saw 4 is generally magnetic, so when the band saw 4 rotates, the magnetic resistance increases at the notch 8 provided in the band saw 4, so the magnetic flux passing through the pole piece 13 changes, and the coil 12 An induced voltage is generated at both ends. The peak value of this induced voltage is directly proportional to the circumferential speed of the band saw 4 and the pole piece 1.
It is inversely proportional to the air gap with the tip of No. 3.

従つて、帯鋸４に設けた切欠部８を検出器１０
により安定に検出するには、帯鋸４の周速度を検
出可能な周速度とし、帯鋸４とポールピース１３
の先端とのエアギヤツプを一定に保つ必要があ
る。第５図は、帯鋸４とポールピース１３の先端
とのエアギヤツプを一定に保つための検出機構部
７の実施例を示すものである。ベース１４に回転
可能に軸支した２個のローラ１５と検出器１０を
固定し、且つ圧縮バネ１６とストツパーピン１７
により、ノコカバー５に摺動可能に支承し帯鋸４
が図の上下方向に動揺しても帯鋸４とポールピー
ス１３の先端とのエアギヤツプを常に一定に保つ
ようにしている。ストツパーピン１７は帯鋸４を
着脱交換する際に検出機構部７がノコカバー５か
ら、抜け落ちないようにするために設けているも
のである。 Therefore, the notch 8 provided on the band saw 4 is used as the detector 10.
In order to detect more stably, the circumferential speed of the band saw 4 should be set to a detectable circumferential speed, and the band saw 4 and the pole piece 13
It is necessary to maintain a constant air gap with the tip of the FIG. 5 shows an embodiment of the detection mechanism 7 for keeping the air gap between the band saw 4 and the tip of the pole piece 13 constant. Two rollers 15 rotatably supported on a base 14 and a detector 10 are fixed, and a compression spring 16 and a stopper pin 17 are fixed.
The band saw 4 is slidably supported on the saw cover 5.
The air gap between the band saw 4 and the tip of the pole piece 13 is always kept constant even if the band saw moves in the vertical direction in the figure. The stopper pin 17 is provided to prevent the detection mechanism section 7 from falling out of the saw cover 5 when the band saw 4 is attached or removed.

次に、帯鋸４の周速度制御回路の動作につい
て、第７図に示すブロツク回路図、第８図に示す
タイムチヤート図により説明する。第７図中のａ
〜ｇの出力信号は、各々第８図のＡ〜Ｇに対応す
るものである。スイツチ６を操作して「ON」に
すると、電動機１に電源が供給され、徐々に回転
数が上昇し、検出器１０により帯鋸４に設けた切
欠部８を検出可能な一定の周速度で回転するよう
予め制御されている。遅延回路１９は帯鋸４が一
定の周速度に達した後、検出器１０からの信号を
読み込み処理するよう、スイツチ６の「ON」に
より動作し、時間Ｔ後、第８図Ｂに示すよう論理
「０」から「１」とする遅延機能を有している。
タイマ２０は、遅延回路１９の出力が論理「１」
となつた後、波形整形回路２１の出力信号により
動作するものであり、検出器１０の出力信号（第
８図Ｃ）の正電圧側信号を波形整形回路２１によ
り波形整形されたパルス信号（第８図Ｄ）の論理
「０」から「１」の立上りを検出して、時間T1の
論理「１」の出力信号（第８図Ｅ）を発する。こ
の時間T1は、一定の周速度で回転する帯鋸４の
全周長に対し、一定の長さ範囲内に設けた１個以
上の切欠部８が通過する時間より、多少大きな時
間に設定されている。 Next, the operation of the circumferential speed control circuit of the band saw 4 will be explained with reference to the block circuit diagram shown in FIG. 7 and the time chart shown in FIG. 8. a in Figure 7
The output signals of -g correspond to A to G in FIG. 8, respectively. When the switch 6 is operated to turn on, power is supplied to the electric motor 1, the rotation speed gradually increases, and the detector 10 rotates at a constant circumferential speed that can detect the notch 8 provided on the band saw 4. It is controlled in advance to After the band saw 4 reaches a certain circumferential speed, the delay circuit 19 is activated by turning the switch 6 "ON" so as to read and process the signal from the detector 10, and after the time T, the logic is activated as shown in FIG. 8B. It has a delay function that changes from "0" to "1".
The timer 20 has a logic “1” output from the delay circuit 19.
After that, it is operated by the output signal of the waveform shaping circuit 21, and converts the positive voltage side signal of the output signal of the detector 10 (FIG. 8C) into a pulse signal (waveform shaped by the waveform shaping circuit 21). The rise of logic "0" to "1" in FIG. 8D) is detected, and an output signal of logic "1" at time T1 (FIG. 8E) is generated. This time T 1 is set to a time that is slightly longer than the time it takes for one or more notches 8 provided within a certain length range to pass over the entire circumference of the bandsaw 4 that rotates at a certain circumferential speed. ing.

タイマ２０の出力が論理「１」となつている時
間T1の間に、波形整形回路２１の出力信号のパ
ルス数を判断回路２２により計数させる。 During the time T1 during which the output of the timer 20 is at logic " 1 ", the number of pulses of the output signal of the waveform shaping circuit 21 is counted by the determination circuit 22.

しかし、タイマ２０が動作可能となつてから、
判断回路２２により、計数を開始すると、必ずし
も帯鋸４に設けた切欠部８の最初１個目から検出
し、計数することができない場合も生じるため、
必ず２回計数させる必要がある。 However, after the timer 20 became operational,
When the determination circuit 22 starts counting, it may not necessarily be possible to detect and count from the first notch 8 provided on the band saw 4.
It is necessary to count twice.

この２回の計数動作は、カウンタ２３によりタ
イマ２０の出力パルスの数を計数し、２回計数
後、第８図Ｆに示すようその出力を論理「１」と
し、この論理「１」により、判断回路２２の計数
動作を停止させる。判断回路２２は、１回目の計
数値を無視し、２回目の計数値を真の値として採
用し、帯鋸４の刃のピツチを判断し、且つ帯鋸４
の刃のピツチに対応した電気信号に変換して、次
段の周速度指示回路２４へ出力する。 In these two counting operations, the counter 23 counts the number of output pulses of the timer 20, and after counting twice, the output is set to logic "1" as shown in FIG. 8F, and with this logic "1", The counting operation of the judgment circuit 22 is stopped. The judgment circuit 22 ignores the first count value, adopts the second count value as the true value, judges the pitch of the blade of the band saw 4, and
It is converted into an electric signal corresponding to the pitch of the blade and output to the next stage circumferential speed indicating circuit 24.

周速度指示回路２４は、判断回路２２の出力信
号と、被切断材の材質を入力設定する材質指示回
路の出力信号とを受けて、帯鋸４の刃のピツチと
被切断材の材質に応じて、予め記憶設定された帯
鋸４の周速度の中から、最適な周速度を自動的に
選択し、又は演算して指示する回路であり、速度
制御回路２５を介して、電動機１が適正な回転数
で運転するように制御する。又、速度検出器２６
により、電動機１の回転速度を検出し、その回転
数に比例した電圧信号に変換して、速度制御回路
２５に帰還させ、電動機１に加わる負荷変動に即
して、供給電力を制御して、周速度指示回路２４
により指示された周速度で帯鋸４が回転するよう
にしている。 The circumferential speed instruction circuit 24 receives the output signal of the judgment circuit 22 and the output signal of the material instruction circuit that inputs and sets the material of the material to be cut, and determines the pitch of the blade of the band saw 4 and the material of the material to be cut. , is a circuit that automatically selects or calculates and instructs the optimum circumferential speed from among the circumferential speeds of the bandsaw 4 that have been stored and set in advance. Control the driving by numbers. Also, the speed detector 26
detects the rotational speed of the electric motor 1, converts it into a voltage signal proportional to the rotational speed, feeds it back to the speed control circuit 25, and controls the supplied power in accordance with load fluctuations applied to the electric motor 1. Circumferential speed instruction circuit 24
The band saw 4 is made to rotate at the circumferential speed instructed by.

尚、遅延回路１９により設定された遅延時間Ｔ
の後、タイマ２７により予め設定された時間T2
の論理「１」の信号（第８図Ｇ）を発し、この時
間T2の間に、切欠部８の個数を計数する判断回
路２２の計数値がゼロの場合は、警報器２８を作
動して、作業者が手動操作により所定の周速度に
設定するよう警告を発するようにしている。 Note that the delay time T set by the delay circuit 19
After that, the time T 2 preset by the timer 27
If the count value of the judgment circuit 22 that counts the number of notches 8 is zero during this time T2 , the alarm 28 is activated. A warning is issued to the operator to manually set the circumferential speed to a predetermined value.

帯鋸４の刃を直接検出器１０により検出する場
合は、検出器１０のポールピース１３を刃の先
端、又は側面からわずかな距離隔てて配設し、第
６図、第７図に示す検出機構部７の構成のよう
に、帯鋸４が動揺しても、常に帯鋸４とボールピ
ース１３の間隔を一定に保つよう工夫すれば良
い。この場合は、タイマ２０が論理「１」となつ
ている時間T1の間に帯鋸４の刃の凹凸を検出し、
判断回路２２により計数した値から帯鋸４の刃の
ピツチを判断することになる。しかし、帯鋸４の
刃のピツチが非常に小さい場合は、検出器１０に
よる検出は不可能となるため、前述の如く、帯鋸
４の鋸身に切欠部８を設け、検出器１０により検
出する方式が有効であり、容易且つ確実に検出す
ることができる。 When the blade of the band saw 4 is directly detected by the detector 10, the pole piece 13 of the detector 10 is placed a short distance from the tip or side of the blade, and the detection mechanism shown in FIGS. 6 and 7 is used. As with the configuration of section 7, even if the band saw 4 oscillates, it may be devised to always keep the distance between the band saw 4 and the ball piece 13 constant. In this case, the unevenness of the blade of the band saw 4 is detected during the time T1 during which the timer 20 is at logic "1",
The pitch of the blade of the band saw 4 is determined from the value counted by the determination circuit 22. However, if the pitch of the blade of the band saw 4 is very small, detection by the detector 10 is impossible, so as described above, a method is adopted in which a notch 8 is provided in the saw blade of the band saw 4 and the pitch is detected by the detector 10. is effective and can be detected easily and reliably.

第２図では帯鋸４の鋸身に切欠部８を設けてい
るが、この切欠部８に第３図に示す如く非磁性体
９を埋め込でも良いものであり、更に、この場合
は切欠部８に切断屑などが入るために発生する誤
検出を防止し、且つ、第５図のローラ１５がより
円滑に帯鋸４に接触できるようになる。 In FIG. 2, a notch 8 is provided in the saw blade of the band saw 4, but it is also possible to embed a non-magnetic material 9 in this notch 8 as shown in FIG. This prevents erroneous detection caused by cutting debris etc. entering the band saw 8, and allows the roller 15 shown in FIG. 5 to contact the band saw 4 more smoothly.

第５図では検出機構部７の構成として、ローラ
１５、バネ１６、ストツパーピン１７を２個ずつ
使用しているが、第６図に示す如く、ベース１４
の一方端をピン１８により、ノコカバー５の適所
に回動可能に軸支し、ローラ１５、バネ１６、ス
トツパーピン１７を各１個とし、ノコカバー５に
摺動可能に支承しても同様の効果が得られるもの
である。 In FIG. 5, the detection mechanism section 7 uses two rollers 15, two springs 16, and two stopper pins 17, but as shown in FIG.
The same effect can be obtained even if one end of the saw cover 5 is rotatably supported by a pin 18 at an appropriate position on the saw cover 5, and one roller 15, one spring 16, and one stopper pin 17 are provided and slidably supported on the saw cover 5. That's what you get.

又、第２図では帯鋸４の鋸身に切欠部８を設け
ているが、小穴を設け、検出器１０を帯鋸４の側
面にわずかな距離隔てて配設しても良いものであ
り、小穴に非磁性体を埋め込でも良いものであ
る。 Further, in FIG. 2, a notch 8 is provided in the saw blade of the band saw 4, but it is also possible to provide a small hole and arrange the detector 10 at a small distance on the side of the band saw 4. It is also possible to embed a non-magnetic material inside.

第７図では帯鋸４に設けた切欠部８の個数を計
数して帯鋸４の刃のピツチを判断するようにした
が、帯鋸４に設ける切欠部８を第１０図に示す如
くコード化して配置させ、少ない切欠部８の個数
で多くの帯鋸４の刃のピツチの種類を識別するよ
うにしても良いものである。 In FIG. 7, the pitch of the blade of the band saw 4 is determined by counting the number of notches 8 provided on the band saw 4, but the notches 8 provided on the band saw 4 are coded and arranged as shown in FIG. It is also possible to identify the pitch types of the blades of many bandsaws 4 using a small number of notches 8.

第１０図においては切欠部８の個数が最大４個
の場合を示し、図において左側より、第１個目の
切欠部８はコード化された切欠部８の開始を示す
基準となる切欠部８であり、第２個目から第４個
目の切欠部８が識別用にコード化された切欠部８
である。第１０図では、第２個目と第４個目に切
欠部８が有り、第３個目に切欠部８が無い状態を
示しておりコード化した表し方をすると「101」
となる。 FIG. 10 shows a case where the maximum number of notches 8 is four, and from the left side of the figure, the first notch 8 is the notch 8 that serves as a reference indicating the start of the coded notch 8. The second to fourth notches 8 are the notches 8 coded for identification.
It is. In Fig. 10, there is a notch 8 in the second and fourth pieces, and there is no notch 8 in the third piece, which is expressed as "101" in coded form.
becomes.

従つて、４個の切欠部８中、３個の切欠部８の
有無により、８種類の帯鋸４の刃のピツチを織別
できる。即ち、切欠部８の個数Ｎとすれば（Ｎ―
１）2種類の識別ができる。 Therefore, the pitch of the blades of the eight types of band saws 4 can be determined depending on the presence or absence of three of the four notches 8. That is, if the number of notches 8 is N, then (N-
1) Able to identify two types.

第１０図に示す切欠部８を検出し識別するブロ
ツク回路図、タイムチヤート図を第９図、第１１
図に示す。第９図中のｂ，ｄ，ｇ，ｉ，ｊ，ｋ，
ｌ，ｍは第１１図のＢ，Ｄ，Ｇ，Ｉ，Ｊ，Ｋ，
Ｌ，Ｍに対応するものである。第９図は第７図の
タイム２０をタイム３０，３１，３２，３３，３
４に置き換え、これらのタイマ３０〜３４は遅延
回路１９の出力が論理「１」となつた後、波形整
形回路２１の出力信号により動作するものであ
る。タイマ３０，３１は基準切欠部８に相当する
波形整形回路２１の最初のパルスを検出し夫々時
間T1、時間T3の論理「１」の信号（第１１図Ｍ，
Ｉ）を発し、次にタイマ３１が動作後順次タイマ
３２，３３，３４により時間T4の論理「１」の
信号（第１１図Ｊ，Ｋ，Ｌ）を発させ、タイマ３
２，３３，３４の出力が夫々論理「１」のなつて
いる時間T4の間に、コード化された切欠部８に
相当する波形整形回路２１のパルス信号の有無を
判断回路２１で検出させる。この場合において
も、第７図と同様、必ず２回の検出動作を行い、
２回目の検出値を真の値として採用するようにし
ている。前記、時間T3は時間T4の約1/2に設定
し、時間T4は波形整形回路２１の各パルスの時
間間隔が多少変化しても、確実に検出できるよう
に設定している。 The block circuit diagram and time chart for detecting and identifying the notch 8 shown in FIG. 10 are shown in FIGS. 9 and 11.
As shown in the figure. b, d, g, i, j, k in Figure 9,
l, m are B, D, G, I, J, K in Figure 11,
This corresponds to L and M. Figure 9 shows time 20 in Figure 7 as time 30, 31, 32, 33, 3.
4, these timers 30 to 34 are operated by the output signal of the waveform shaping circuit 21 after the output of the delay circuit 19 becomes logic "1". The timers 30 and 31 detect the first pulse of the waveform shaping circuit 21 corresponding to the reference notch 8 and output logic "1" signals at time T 1 and time T 3 (M, FIG. 11, respectively).
Then, after the timer 31 operates, the timer 32, 33, and 34 sequentially issue a logic "1" signal (J, K, L in FIG. 11 ) at time T4, and the timer 3
During the time T4 during which the outputs of outputs 2, 33, and 34 are at logic "1", the determination circuit 21 detects the presence or absence of a pulse signal from the waveform shaping circuit 21 corresponding to the coded notch 8. . In this case as well, as in Fig. 7, the detection operation must be performed twice.
The second detected value is adopted as the true value. The time T 3 is set to about 1/2 of the time T 4 , and the time T 4 is set so that even if the time interval between each pulse of the waveform shaping circuit 21 changes somewhat, it can be detected reliably.

更に、帯鋸４の最適周速度を設定する条件とし
て、帯鋸４の刃のピツチ、被切断材の材質、他に
切断荷重も必要となるが、荷重設定用の調整ノブ
に検出器を備えて、荷重に相当する電気信号に変
換し、第７図の周速度指示回路２４に入力し、演
算させれば、帯鋸４の刃のピツチ、被切断材の材
質、切断荷重に対し、最適な周速度を自動設定す
ることは可能である。 Furthermore, as conditions for setting the optimal circumferential speed of the band saw 4, the pitch of the blade of the band saw 4, the material of the material to be cut, and the cutting load are also required, but the adjustment knob for setting the load is equipped with a detector. By converting it into an electrical signal corresponding to the load, inputting it to the circumferential speed indicating circuit 24 in FIG. 7, and calculating it, the optimum circumferential speed can be determined based on the pitch of the blade of the band saw 4, the material of the material to be cut, and the cutting load. It is possible to set it automatically.

本発明は帯鋸刃のピツチを自動的に検出できる
ようにしたので、次のような効果を奏することが
できる。 Since the pitch of the band saw blade can be automatically detected in the present invention, the following effects can be achieved.

(1) 帯鋸刃のピツチと被切断材の材質との組み合
わせによつて決められる最適な帯鋸の周速度を
表などから選定する煩わしさがない。(1) There is no need to bother with selecting from a table or the like the optimum peripheral speed of the band saw, which is determined by the combination of the pitch of the band saw blade and the material of the material to be cut.

(2) 選定した周速度を手動操作でバンドソーに設
定したり、周速度を調整したりする厄介な手間
がいらない。(2) There is no need to manually set the selected circumferential speed on the band saw or adjust the circumferential speed.

(3) 更に、材質を入力さえすれば、自動的に最適
な周速度で帯鋸が駆動されるので、帯鋸刃の寿
命が長くなり、帯鋸の折損を防止でき、切断能
率を上げ、且つ切断仕上面が滑めらかであり精
度も向上できる。(3) Furthermore, once the material is entered, the band saw is automatically driven at the optimal circumferential speed, which extends the life of the band saw blade, prevents band saw breakage, increases cutting efficiency, and improves the cutting finish. The surface is smooth and accuracy can be improved.

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

第１図は本発明の一実施例を示す携帯用バンド
ソーの正面図、第２図、第３図は帯鋸と検出器の
配置を示す模式図、第４図は検出器の部分縦断面
図、第５図、第６図は検出機構部を示す部分縦断
面図、第７図は本発明制御回路のブロツク回路
図、第８図は第７図のタイムチヤート図、第９図
は第７図の応用例を示すブロツク回路、第１０図
は多数切欠を持つ帯鋸の正面図、第１１図は第９
図のタイムチヤート図である。 図において、１は電動機、４は帯鋸、５はノコ
カバー、７は検出構造部、８は切欠部、９は非磁
性体、１０は検出器、１１は磁石、１２はコイ
ル、１３はポールピース、１４はベース、１５は
ローラ、１６はバネ、１７はストツパーピン、１
８はピン、１９は遅延回路、２０，２７，３０，
３１、３２，３３，３４はタイマ、２１は波形整
形回路、２２は判断回路、２３はカウンタ、２４
は周速度指示回路、２５は速度制御回路、２６は
速度検出回路、２８は警報器、２９は材料指示回
路。 FIG. 1 is a front view of a portable band saw showing an embodiment of the present invention, FIGS. 2 and 3 are schematic diagrams showing the arrangement of a band saw and a detector, and FIG. 4 is a partial longitudinal sectional view of the detector. 5 and 6 are partial vertical sectional views showing the detection mechanism section, FIG. 7 is a block circuit diagram of the control circuit of the present invention, FIG. 8 is a time chart of FIG. 7, and FIG. Fig. 10 is a front view of a band saw with multiple notches, Fig. 11 is a block circuit showing an application example of
It is a time chart diagram of the figure. In the figure, 1 is an electric motor, 4 is a band saw, 5 is a saw cover, 7 is a detection structure, 8 is a notch, 9 is a non-magnetic material, 10 is a detector, 11 is a magnet, 12 is a coil, 13 is a pole piece, 14 is a base, 15 is a roller, 16 is a spring, 17 is a stopper pin, 1
8 is a pin, 19 is a delay circuit, 20, 27, 30,
31, 32, 33, 34 are timers, 21 is a waveform shaping circuit, 22 is a judgment circuit, 23 is a counter, 24
25 is a speed control circuit, 26 is a speed detection circuit, 28 is an alarm, and 29 is a material instruction circuit.

Claims (1)

【特許請求の範囲】 １ 電動機により駆動される駆動ノコ車と従動ノ
コ車に装着された無端の帯鋸を回転させるバンド
ソーにおいて、帯鋸の鋸身の適所に帯鋸刃のピツ
チに対応したマークを設け、このマークの有無を
検出する検出器を本体に配設し、検出器からの電
気信号を受けて帯鋸刃のピツチを判断する判断回
路と、判断回路の出力信号に応じ、予め記憶設定
された帯鋸の周速度の中から直接又は演算により
最適な周速度を指示する周速度指示回路と、周速
度指示回路の指示に従い、電動機の回転速度を制
御する速度制御回路を有することを特徴とした帯
鋸周速度制御装置。 ２ 帯鋸の刃先の近傍に微少距離隔て、帯鋸刃の
凹凸を検出する検出器を配設した請求の範囲第１
項記載の帯鋸周速度制御装置。 ３ 帯鋸の動揺に追従し、帯鋸と検出器の距離を
一定に保つ検出器保持機構を有する特許請求の範
囲第１項、又は第２項記載の帯鋸周速度制御装
置。 ４ 前記検出器からの出力信号が一定時間内に発
生しない場合は、警報を発する警報器を備えた特
許請求の範囲第１項、第２項記載の帯鋸周速度制
御装置。[Scope of Claims] 1. In a band saw that rotates an endless band saw mounted on a drive saw wheel driven by an electric motor and a driven saw wheel, a mark corresponding to the pitch of the band saw blade is provided at an appropriate position on the saw blade of the band saw, A detector for detecting the presence or absence of this mark is installed in the main body, a judgment circuit receives an electric signal from the detector and judges the pitch of the band saw blade, and a band saw blade is set in advance according to the output signal of the judgment circuit. A band saw blade comprising: a circumferential speed indicating circuit that instructs the optimum circumferential speed directly or by calculation from among the circumferential velocities of Speed control device. 2. Claim 1, in which a detector for detecting the unevenness of the band saw blade is arranged at a very small distance near the cutting edge of the band saw.
Band saw circumferential speed control device as described in . 3. The band saw circumferential speed control device according to claim 1 or 2, which has a detector holding mechanism that follows the oscillation of the band saw and keeps the distance between the band saw and the detector constant. 4. The band saw peripheral speed control device according to claims 1 and 2, further comprising an alarm that issues an alarm if the output signal from the detector is not generated within a certain period of time.
JP21804484A 1984-10-16 1984-10-16 Saw element peripheral speed control device for band sawing machine Granted JPS6195815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21804484A JPS6195815A (en) 1984-10-16 1984-10-16 Saw element peripheral speed control device for band sawing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21804484A JPS6195815A (en) 1984-10-16 1984-10-16 Saw element peripheral speed control device for band sawing machine

Publications (2)

Publication Number Publication Date
JPS6195815A JPS6195815A (en) 1986-05-14
JPS6355407B2 true JPS6355407B2 (en) 1988-11-02

Family

ID=16713765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21804484A Granted JPS6195815A (en) 1984-10-16 1984-10-16 Saw element peripheral speed control device for band sawing machine

Country Status (1)

Country Link
JP (1) JPS6195815A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4610473B2 (en) * 2003-12-26 2011-01-12 株式会社アマダ Noise reduction method for band saw and band saw machine
JP4102817B2 (en) * 2004-08-19 2008-06-18 株式会社アマダ Band saw blade
WO2006066259A2 (en) * 2004-12-17 2006-06-22 Milwaukee Electric Tool Corporation Smart acessories for power tools
JP4541375B2 (en) * 2005-05-23 2010-09-08 株式会社アマダ Method of cutting work by band saw machine and band saw machine

Also Published As

Publication number Publication date
JPS6195815A (en) 1986-05-14

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