JPS6310184Y2

JPS6310184Y2 -

Info

Publication number: JPS6310184Y2
Application number: JP1981106068U
Authority: JP
Priority date: 1981-07-18
Filing date: 1981-07-18
Publication date: 1988-03-25
Also published as: JPS5813835U

Description

【考案の詳細な説明】本考案は、加工ラインにおけるワークの位置決
め装置の改良に関わり、更に詳細には、被加工材
を加工ライン上で移送する途中で、曲げ、トリミ
ング、パンチング、コーナシヤーリングなどの流
れ作業を重ねる場合に、その都度全自動的に加工
機の加工中心位置に所要のワークの送材方向の長
さ中心を一致させて位置決めする装置に関するも
のである。従来は、ストツパーピンなどを使用し
て、ワークをこれに突き当てて位置決めしてい
た。しかしワークの長さがいろいろ変化するのに
対応して多数のストツパーピンを予め用意してお
く必要があり、且つその取付位置も搬送ロールの
間におく必要があるために制限があり、ピンを出
没させるための機械的構造も大がかりになる不都
合があつた。本考案は、この問題を克服すべくな
されたもので、以下に図面にもとづいて好適実施
例を詳細に述べる。[Detailed description of the invention] The present invention relates to the improvement of a workpiece positioning device on a processing line, and more specifically, the invention relates to the improvement of a workpiece positioning device on a processing line. This invention relates to a device that automatically positions the length center of a required workpiece in the material feeding direction to coincide with the processing center position of the processing machine each time when assembly operations such as the above are repeated. Conventionally, a stopper pin or the like was used to position the workpiece by abutting it against the stopper pin. However, it is necessary to prepare a large number of stopper pins in advance in response to various changes in the length of the workpiece, and the mounting position is also limited because it must be placed between the conveyor rolls. The mechanical structure required for this purpose was also large-scale, which was disadvantageous. The present invention has been made to overcome this problem, and preferred embodiments will be described in detail below based on the drawings.

第１図において、１で示したものは総括的に示
す本装置であり、３は搬送ロール、CLで示した
のは、第２図に例示してあるように、例えばプレ
スブレーキの加工域の中心線である。５はフラツ
プ式リミツトスイツチ、７は電動機、９は減速
機、１１は減速機からの出力軸にとりつけたスプ
ロケツト、１３はチエンであつて、多数のロール
３は、チエンに駆動されて同時に同方向に回転す
る。更に１５は無接点スイツチなどからなるセン
サ、１７はエンコーダである。 In Fig. 1, 1 is the overall system, 3 is a conveyor roll, and CL is the processing area of a press brake, for example, as shown in Fig. 2. This is the center line. 5 is a flap type limit switch, 7 is an electric motor, 9 is a speed reducer, 11 is a sprocket attached to the output shaft from the speed reducer, 13 is a chain, and a large number of rolls 3 are driven by the chain and move in the same direction at the same time. Rotate. Furthermore, 15 is a sensor consisting of a non-contact switch, etc., and 17 is an encoder.

第２図で、１９はコンピユータを内蔵する制御
盤を、２１はワークを示している。又、加工機の
加工域中心線CLから、センサ１５の感知点まで
の距離をｌとする。 In FIG. 2, numeral 19 indicates a control panel containing a built-in computer, and numeral 21 indicates a workpiece. Further, the distance from the processing area center line CL of the processing machine to the sensing point of the sensor 15 is assumed to be l.

本装置は、以下のように作動する。 The device operates as follows.

左側から搬送ロール３に乗つて送られてくるワ
ーク２１は、まづフラツプ式リミツトスイツチ５
を踏み、その信号は制御盤１９へと伝えられ、引
続いてロールによつて右方向へ移送される。この
時ロール軸と連動するエンコーダ１７から発信さ
れるパルス数は、正確に半数が制御盤１９内のコ
ンピユータに累積され続ける。ワーク２１の全長
がリミツトスイツチ５を通り過ぎると、スイツチ
がオフになり上記パルス半数の積算も停止する。
このとき制御盤１９に内蔵されたコンピユータ
は、前記パルス半数積算数に、前記した加工機の
加工域中心線とセンサ感知点までの距離ｌをエン
コーダ１７のパルス数に換算した数（センサ１５
の感知点位置が決まれば１定数値）を合算してお
く、即ち記号で示すならば、長さｌ＝パルス数P₁ ワーク長さの半分＝パルス数P₂ コンピユータの合算数＝P₁＋P₂ となり、この数値を記憶装置に蓄えておく。 The workpiece 21 that is sent from the left side on the conveyor roll 3 is first moved by the flap type limit switch 5.
, the signal is transmitted to the control panel 19, and is subsequently transferred to the right by the roll. At this time, exactly half of the number of pulses transmitted from the encoder 17 interlocked with the roll axis continues to be accumulated in the computer in the control panel 19. When the entire length of the workpiece 21 passes the limit switch 5, the switch is turned off and the integration of half of the pulses is also stopped.
At this time, the computer built in the control panel 19 converts the distance l between the processing area center line of the processing machine and the sensor sensing point into the number of pulses of the encoder 17 (sensor 15
Once the position of the sensing point is determined, add up the constant value (1 constant value), that is, if you show it in symbols, Length l = Number of pulses P ₁ Half of workpiece length = Number of pulses P ₂ Total number of computers = P ₁ + P ₂ , and store this number in the storage device.

又第２図右端上部に図示したように、最終停止
点手前ｍの距離を予めパルス数に換算してコンピ
ユータに与えておき、上記のコンピユータの合算
数からｍの距離に相当するパルス数P₃を減算し
た値を別に記憶させておく、即ち、（P₁＋P₂−
P₃）の位置で信号を発するようにして、停止直
前だけ微速送りをするよう電動機７に指令する場
合も含んでいる。 In addition, as shown in the upper right corner of Figure 2, the distance m before the final stop point is converted into the number of pulses and given to the computer in advance, and the computer calculates the number of pulses P ₃ corresponding to the distance m from the total number of the above computer. Separately store the value obtained by subtracting , that is, (P ₁ + P ₂ −
This also includes a case where a signal is issued at the position P ₃ ) to instruct the motor 7 to perform slow feed only immediately before stopping.

従つてワーク２１の全長が、リミツトスイツチ
５を通過した時点で、上記のようにコンピユータ
を内蔵する制御盤１９の準備が完了しているか
ら、ワークは定速のまゝ搬送ロール３によつて移
送を続け、ワークの先端がセンサ１５の感知点を
通過する時点から、（P₁＋P₂−P₃）の数値からパ
ルス数の減算を開始し、数値が零に達した時点
で、電動機７の徴速に変り（P₁＋P₂）の数値が
零に達した時点で電動機７は停止させられる。 Therefore, when the entire length of the workpiece 21 passes through the limit switch 5, the preparation of the control panel 19 containing the computer is completed as described above, and the workpiece is transferred by the transport roll 3 at a constant speed. Then, from the time when the tip of the workpiece passes the sensing point of the sensor 15, the number of pulses is subtracted from the value of (P ₁ + P ₂ - P ₃ ), and when the value reaches zero, the motor 7 is The electric motor 7 is stopped when the speed changes and the value of (P ₁ +P ₂ ) reaches zero.

以上のごとき実施例の説明より理解されるよう
に、要するに本考案の要旨は実用新案登録請求の
範囲に記載のとおりであるから、その記載より明
らかなように、本考案においては、加工ラインに
おける複数の搬送ロールは連動して同方向へ回転
するものであり、この加工ラインの上流側には、
ワークの先端と末端とを検知することによつてワ
ークの通過を検知するスイツチが設けてあり、こ
のスイツチの下流側でワークの中心を停止すべく
予め設けられた中心線の位置から所定距離だけ上
流側の位置には、ワークの先端の通過を感知する
センサが設けてある。そして、前記スイツチがワ
ークの通過を検知しているときに、搬送ロールの
回転に連動して回転するエンコーダから発信され
るパルス数を計数してワーク長さ半分を求める機
能と、ワーク長さ半分に対応する第１のパルス数
と前記距離に対応する第２のパルス数との和から
ワークの最終停止点手前に対応する第３のパルス
数を減算した減算値を求める機能と、前記センサ
がワークの先端を感知したときから減算を開始し
て前記減算値が零になつたときにワークの送りを
微速送りにすべく搬送ロールの回転を制御し、か
つ前記第１のパルス数と第２のパルス数との和が
零になつたときに搬送ロールの回転を停止する制
御機能を備えてなる制御盤を設けてなるものであ
る。 As can be understood from the above description of the embodiments, the gist of the present invention is as stated in the claims for utility model registration. A plurality of conveyor rolls are linked and rotate in the same direction, and on the upstream side of this processing line,
A switch is provided to detect the passing of the workpiece by detecting the tip and end of the workpiece, and on the downstream side of this switch, the center of the workpiece is stopped at a predetermined distance from a predetermined center line position. A sensor is provided at the upstream position to detect the passage of the leading end of the workpiece. When the switch detects the passing of the workpiece, there is a function to calculate the workpiece length in half by counting the number of pulses sent from the encoder that rotates in conjunction with the rotation of the conveyor roll, and a function to calculate the workpiece length by half. a function to obtain a subtracted value by subtracting a third number of pulses corresponding to the position before the final stopping point of the workpiece from the sum of a first number of pulses corresponding to the distance and a second number of pulses corresponding to the distance; Subtraction is started when the leading edge of the workpiece is sensed, and when the subtraction value reaches zero, the rotation of the conveyance roll is controlled so that the workpiece is fed at a slow speed, and the first pulse number and the second pulse number are A control panel is provided with a control function to stop the rotation of the transport roll when the sum of the number of pulses and the number of pulses becomes zero.

すなわち本考案によれば、スイツチおよびセン
サを、ワークを停止すべき位置より上流側に設置
できるで、例えばワークの停止位置が劣悪な作業
条件の場所であつても何等問題がないものであ
る。また、ワークを停止せしめるときには、予め
設定された寸法だけ手前から微速送りに制御され
るので、ワークを停止位置へ正確に位置決めでき
るものである。 That is, according to the present invention, the switch and the sensor can be installed upstream of the position where the workpiece is to be stopped, and there is no problem even if the workpiece is stopped at a location where the working conditions are poor, for example. Furthermore, when stopping the work, the work is controlled to be fed at a very slow speed from the front by a preset distance, so that the work can be accurately positioned to the stopping position.

なお、本考案は前述の実施例のみに限られるも
のではなく、適宜の変更を行なうことによつては
その他の態様でも実施し得るものである。 It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of drawings]

第１図は、本考案の装置を備えた、搬送ライン
の１部の平面図であり、第２図は、本装置の作動
説明図である。図面の主要部分を説明する符号の説明、１……
位置決め装置、CL……加工機の加工域中心線、
５……フラツプ式リミツトスイツチ、１５……セ
ンサ、１７……エンコーダ、１９……制御盤、ｌ
……加工域中心線とセンサ感知点間の距離、ｍ…
…徴速送り距離。 FIG. 1 is a plan view of a portion of a conveyance line equipped with the device of the present invention, and FIG. 2 is an explanatory diagram of the operation of the device. Explanation of symbols explaining the main parts of the drawings, 1...
Positioning device, CL... Center line of the processing area of the processing machine,
5... Flap type limit switch, 15... Sensor, 17... Encoder, 19... Control panel, l
...Distance between the processing area center line and the sensor sensing point, m...
...Charge feed distance.

Claims

[Scope of utility model registration request]

A plurality of transport rolls 3 in a processing line for transporting workpieces are provided in conjunction to rotate in the same direction,
A switch 5 is provided on the upstream side of the processing line to detect passage of the tip and end of the workpiece, and on the downstream side of this switch 5, the switch 5 is placed at a predetermined position from the center line CL set in advance to stop the center of the workpiece. A sensor 15 is provided upstream by a distance l to detect the passage of the tip of the workpiece, and when the switch 5 detects the passage of the workpiece, an encoder 17 rotating in conjunction with the rotation of the transport roll 3 sends a signal. A function to calculate half of the workpiece length by counting the number of pulses that correspond to the length of the workpiece, and a sum of the first number of pulses _P2 corresponding to half the workpiece length and the second number _P1 of pulses corresponding to the distance l. A function to obtain a subtraction value by subtracting a third pulse number P ₃ corresponding to the point m before the final stopping point of the workpiece from M, and a function to start subtraction from when the sensor 15 detects the tip of the workpiece until the subtraction value becomes zero. The rotation of the transport roll 3 is controlled so that the workpiece is fed at a very slow speed, and the work is transported when the sum of the first number of pulses _P2 and the second number of pulses _P1 becomes zero. A material positioning device for a processing line, characterized in that it is provided with a control panel 19 having a control function for stopping the rotation of the roll 3.