JPH0232935B2 - - Google Patents
Info
- Publication number
- JPH0232935B2 JPH0232935B2 JP59276428A JP27642884A JPH0232935B2 JP H0232935 B2 JPH0232935 B2 JP H0232935B2 JP 59276428 A JP59276428 A JP 59276428A JP 27642884 A JP27642884 A JP 27642884A JP H0232935 B2 JPH0232935 B2 JP H0232935B2
- Authority
- JP
- Japan
- Prior art keywords
- main motor
- rotation speed
- motor
- circuit
- resistor
- 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 - Lifetime
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- Adjustment And Processing Of Grains (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は循環式精米機の垂直循環回路中に抵
抗体を出し入れすることによつて、精白圧力を自
動的に調整するための自動抵抗装置付精米機に関
するものである。[Detailed Description of the Invention] Industrial Application Field The present invention is a rice milling machine equipped with an automatic resistance device for automatically adjusting milling pressure by inserting and removing a resistor into and out of the vertical circulation circuit of a circulating rice milling machine. It's about machines.
従来の技術
従来の自動抵抗装置付精米機は送穀ロールを駆
動する主モータの電流値を検出し、その電流値の
変動を変換回路によつて電圧値の変動に変換し、
これを比較回路へ入力させるようにしている。Conventional technology A conventional rice milling machine with an automatic resistance device detects the current value of the main motor that drives the grain feeding roll, converts the fluctuation of the current value into fluctuation of the voltage value using a conversion circuit,
This is input to the comparison circuit.
精白作用が進み、循環回路中の精白圧力が低く
なると、前記主モータの電流値が減少し、比較回
路への入力電圧も減少する。斯様にして比較回路
へ供給される入力電圧が比較回路に予じめ設定さ
れた基準電圧範囲の下限以下まで低下すると、そ
の信号を駆動回路に送出し、補助モータを回転
し、これによつて、精米機の循環回路の壁面に取
付けられた抵抗体を垂直循環回路内に除々に突出
させて、精白圧力を高める
精白圧力が高まり、主モータの電流値が増大
し、比較回路への入力電圧が上昇し、設定された
基準電圧範囲に達すると、比較回路から駆動回路
へ入力する信号の送出は止み、上述の抵抗体の突
出動作は停止する。 As the whitening action progresses and the whitening pressure in the circulation circuit decreases, the current value of the main motor decreases and the input voltage to the comparator circuit also decreases. In this way, when the input voltage supplied to the comparator circuit drops below the lower limit of the reference voltage range preset in the comparator circuit, the signal is sent to the drive circuit, which rotates the auxiliary motor. Then, a resistor attached to the wall of the circulation circuit of the rice milling machine is gradually protruded into the vertical circulation circuit to increase the milling pressure.As the milling pressure increases, the current value of the main motor increases, and the input to the comparison circuit increases. When the voltage increases and reaches the set reference voltage range, the comparison circuit stops sending the signal input to the drive circuit, and the above-mentioned protruding operation of the resistor stops.
このパタンを繰返しながら精米が次第に進行す
るものである。 Rice polishing progresses gradually by repeating this pattern.
発明が解決しようとする問題点
上記従来の精米機に於いては、その電源電圧が
上昇した場合、無負荷時の主モータの消費電流は
大きく影響をうけ、急増する。Problems to be Solved by the Invention In the above-mentioned conventional rice milling machine, when the power supply voltage increases, the current consumption of the main motor during no-load is greatly affected and increases rapidly.
従つて、無負荷時の電流値が設定基準電流範囲
内の電流値と同一値になつてしまう為、抵抗装置
が作動しないというおそれがある。 Therefore, since the current value under no load becomes the same as the current value within the set reference current range, there is a possibility that the resistor device will not operate.
本発明は斯様な従来の精米機に於ける問題点を
解決し、電源電圧が上昇し、無負荷運転時におけ
る主モータの消費電流が急増した場合でもそれに
よつて抵抗装置が作動しなくなるようなことのな
いようにすることを目的とするものである。 The present invention solves such problems in conventional rice milling machines, and even if the power supply voltage rises and the current consumption of the main motor increases rapidly during no-load operation, the resistance device will not operate. The purpose is to prevent this from happening.
問題点を解決するための手段
本発明は循環式精米機の垂直循環回路に抵抗体
を自動的に出し入れするための自動抵抗装置を設
けた精米機において、送穀ロール３を回転するた
めの主モータ２と、上記抵抗体７を出し入れする
ための補助モータ９との間に、主モータ２の回転
数を読取るための回転数読取装置１２と、比較回
路１３及び駆動回路１４とを順次設けた精米機で
ある。Means for Solving the Problems The present invention provides a rice milling machine equipped with an automatic resistance device for automatically putting a resistor in and out of a vertical circulation circuit of the circulating rice milling machine. A rotation speed reading device 12 for reading the rotation speed of the main motor 2, a comparison circuit 13, and a drive circuit 14 are sequentially provided between the motor 2 and the auxiliary motor 9 for inserting and removing the resistor 7. It is a rice milling machine.
作 用
本精米機の送穀ロール３を駆動する主モータ２
の主軸の回転数を検出し、駆動回路に予めセツト
された基準値と比較して駆動回路１４に信号を送
り、補助モータ９を正逆回転し、抵抗体７を出し
入れすることによつて、垂直循環回路５内の精白
圧力を、電源電圧の高低に左右されずに、自動的
に調整するものである。Function Main motor 2 that drives grain feeding roll 3 of this rice milling machine
By detecting the rotation speed of the main shaft of the motor, comparing it with a reference value set in advance in the drive circuit, and sending a signal to the drive circuit 14, the auxiliary motor 9 is rotated in forward and reverse directions, and the resistor 7 is moved in and out. The whitening pressure in the vertical circulation circuit 5 is automatically adjusted without being affected by the level of the power supply voltage.
実施例
本発明の実施例を添付図面に基いて説明する
と、第１図に示す如く循環タンク１の下部に、主
モータ２で回転される送穀ロール３を内蔵せる精
白室４を設け、該精白室４の出口と前記循環タン
ク１とを垂直循環回路５で連通し、その循環回路
５の側壁に、抵抗装置６で駆動される抵抗体７を
出し入れ自在に設けた精米機に於いて、前記主モ
ータ２と、前記補助モータ９との間に、主モータ
２の回転数読取装置１２と比較回路１３、及び駆
動回路１４とを順次設けたものである。Embodiment An embodiment of the present invention will be described based on the accompanying drawings. As shown in FIG. In a rice milling machine, the outlet of the milling chamber 4 and the circulation tank 1 are connected through a vertical circulation circuit 5, and a resistor 7 driven by a resistance device 6 is provided on the side wall of the circulation circuit 5 so as to be freely put in and taken out. Between the main motor 2 and the auxiliary motor 9, a rotation speed reading device 12 for the main motor 2, a comparison circuit 13, and a drive circuit 14 are sequentially provided.
上記循環タンク１内の穀物は主モータ２によつ
て駆動される送穀ロール３の働きにより、精白室
４、及び垂直循環回路５を通つて矢印Ａ１方向に
強制循環される。この際、該穀物は垂直循環回路
５内に突き出した自動抵抗装置６の抵抗体７と、
循環タンク１内の穀物の自重によつて、循環作用
に対する負荷を受けながら、粒々摩擦による精白
作用を受けて白米になる。 The grain in the circulation tank 1 is forcibly circulated in the direction of arrow A1 through the milling room 4 and the vertical circulation circuit 5 by the action of the grain feeding roll 3 driven by the main motor 2. At this time, the grains are exposed to the resistor 7 of the automatic resistance device 6 protruding into the vertical circulation circuit 5;
The weight of the grains in the circulation tank 1 imposes a load on the circulation action, and the rice undergoes a polishing action due to grain-by-grain friction to become polished rice.
上述の自動抵抗装置６は第２図に示す如く、垂
直循環回路５の壁面５ａに固定した支持台８に、
補助モータ９を固定し、回転止用突起部１０を形
成した抵抗体７を、前記壁面５ａを貫通して設け
ると共に、補助モータ９にカツプリング１１を設
け、このカツプリング１１に前記抵抗体７を螺合
し、補助モータ９の正逆回転により、カツプリン
グ１１を回転せしめ、抵抗体７を矢印Ａ２方向に
移動させ、垂直循環回路５への突出量ｌを変化さ
せることにより、穀粒に与える精白圧力を変える
ものである。 As shown in FIG. 2, the above-mentioned automatic resistance device 6 is mounted on a support base 8 fixed to the wall surface 5a of the vertical circulation circuit 5.
The auxiliary motor 9 is fixed, and a resistor 7 having a rotation-stopping protrusion 10 is provided passing through the wall surface 5a.A coupling 11 is also provided on the auxiliary motor 9, and the resistor 7 is screwed into the coupling 11. Then, by rotating the auxiliary motor 9 forward and backward, the coupling 11 is rotated, the resistor 7 is moved in the direction of arrow A2, and the amount of protrusion l into the vertical circulation circuit 5 is changed, thereby increasing the polishing pressure applied to the grains. It changes the
主モータ２（誘導電動機）の主軸の回転数（r.
p.m）に対するトルクの関係は第３図のような曲
線になる。即ち、上記曲線上における点ａ付近に
於いてはトルクが増加すると、主モータ２の回転
数は低下する。 The rotation speed of the main shaft of main motor 2 (induction motor) (r.
The relationship between torque and torque (pm) is a curve as shown in Figure 3. That is, when the torque increases near point a on the curve, the rotational speed of the main motor 2 decreases.
又、主モータ２のトルクが零（無負荷運転）の
点ｂでは、主軸回転数は同期速度（無負荷時の回
転速度）となり、すべり率は０となる。 Further, at point b where the torque of the main motor 2 is zero (no-load operation), the main shaft rotational speed becomes the synchronous speed (rotational speed at no-load) and the slip ratio becomes zero.
こゝでいうすべり率（％）は次の数式(1)で表示
できる。 The slip rate (%) can be expressed using the following formula (1).
すべり率（％）＝同期速度−全負荷回転数／同期速度×
100
……(1)
即ち、第３図中の点ａは主モータ２の全負荷点
を示し、点Ｃは全負荷時のモータ回転数と前記(1)
式の全負荷時のすべり率を示す。Slip rate (%) = Synchronous speed - Full load rotation speed / Synchronous speed x
100...(1) That is, point a in Figure 3 indicates the full load point of the main motor 2, and point C indicates the motor rotation speed at full load and (1) above.
The slip rate at full load is shown in Eq.
全負荷点ａより重負荷となり、トルクが大きく
なれば、主モータ２の回転数は低下し、又それよ
り軽負荷になれば、トルクは小さくなり、主軸回
転数は高くなる。 If the load becomes heavier than the full load point a and the torque increases, the rotational speed of the main motor 2 will decrease, and if the load becomes lighter than that, the torque will decrease and the main shaft rotational speed will increase.
本発明はこの特性を利用し、精米機の主モータ
２の主軸回転数並びにすべり率を点ｃに保つ如
く、抵抗体７の突出量ｌを調節すれば、主モータ
２は常に全負荷トルク点ａを常時使用することと
なり、精米が進むにつれて、精白力が低下する現
象を解消でき、精米効率の高い自動精米が可能に
なる。 The present invention makes use of this characteristic, and by adjusting the protruding amount l of the resistor 7 so as to maintain the main shaft rotation speed and slip rate of the main motor 2 of the rice mill at point c, the main motor 2 always reaches the full load torque point. A is constantly used, which eliminates the phenomenon in which the polishing power decreases as rice milling progresses, and enables automatic rice milling with high rice milling efficiency.
第４図で示した本発明の制御回路中、２は送穀
ロール３を駆動する主モータ、１２は主モータ２
の主軸の回転数読み取り装置、１３は読み取り装
置より回転数信号と、基準回転数とを比較して信
号を出す比較回路、１４は比較回路からの信号に
よつて、補助モータ９を正逆回転する駆動回路、
９は抵抗体７を出し入れする補助モータである。 In the control circuit of the present invention shown in FIG. 4, 2 is the main motor that drives the grain feeding roll 3;
13 is a comparison circuit that compares the rotation speed signal from the reader with a reference rotation speed and outputs a signal; 14 is a signal from the comparison circuit that rotates the auxiliary motor 9 in forward and reverse directions; drive circuit,
9 is an auxiliary motor for moving the resistor 7 in and out.
こゝで、上記主モータ２の主軸回転数読み取り
装置１２を、三つの実施例について説明すると次
の通りである。 Three embodiments of the main shaft rotational speed reading device 12 of the main motor 2 will be described below.
主モータ２の主軸にロータリエンコーダを取
り付け、その回転数を読み取るもの。 A rotary encoder is attached to the main shaft of the main motor 2 to read its rotation speed.
主モータの主軸にスリツト円板を設け、それ
を光電式に読み取るもの。 A slit disk is installed on the main shaft of the main motor, and the disk is read photoelectrically.
この場合、スリツト円板の円周上のスリツト
数をＮとし、出力パルス周期をＴとするとその
ときの主モータ２の回転数は次の通りである。 In this case, when the number of slits on the circumference of the slit disk is N and the output pulse period is T, the number of rotations of the main motor 2 at that time is as follows.
回転数（r.p.m）＝60／Ｎ・Ｔ ……(2)
但し、円周上にはいくつかのスリツトが等間
隔に形成されているものとする。 Rotation speed (rpm) = 60/N・T...(2) However, it is assumed that several slits are formed at equal intervals on the circumference.
主モータの主軸に円板状のマグネツト（或は
円板上に適当数のマグネツトを取付けたもの）
を取付け、この回転数を磁気センサで読み取る
もの。 A disc-shaped magnet on the main shaft of the main motor (or an appropriate number of magnets mounted on a disc)
is installed and this rotation speed is read with a magnetic sensor.
この場合、円板の円周上に取り付けられたマ
グネツトの極数をＮとし、出力パルス周期をＴ
とすると、そのときの主モータ２の回転数は前
述の(2)式によつて同様に求められる。 In this case, the number of poles of the magnet attached on the circumference of the disk is N, and the output pulse period is T.
Then, the rotational speed of the main motor 2 at that time can be similarly determined by the above-mentioned equation (2).
以上何れかの読み取り装置１２によつて、主モ
ータ２の主軸回転数を検出し、比較回路１３に予
めセツトされた値と比較して駆動回路１４に信号
を送るものである。 The rotational speed of the main shaft of the main motor 2 is detected by one of the reading devices 12 mentioned above, and compared with a value set in advance in the comparison circuit 13, and a signal is sent to the drive circuit 14.
発明の効果
本発明は上述の通りであるので、精米機の主モ
ータ２の回転数を回転数読み取り装置１２で読み
取り、その回転数と予じめ設定された基準回転数
（モータ全負荷時の回転数、或は全負荷時より10
％〜20％高めの負荷時の回転数）とを比較回路１
３で比較し、前記主モータ２の回転数の高低によ
つて補助モータ９を駆動回路で正逆転し、抵抗体
７を精米機の循環回路中に出し入れし、穀粒に対
する精白圧力を調整し、常に主モータ２が最良の
状態、例えば、全負荷、或はそれより10％〜20％
増で運転されるようにすることができる。Effects of the Invention Since the present invention is as described above, the rotation speed of the main motor 2 of the rice milling machine is read by the rotation speed reading device 12, and the rotation speed and the preset reference rotation speed (at full load of the motor) are read. 10 from the rotation speed or at full load
Comparison circuit 1
3, the auxiliary motor 9 is rotated in the forward and reverse directions by the drive circuit depending on the rotational speed of the main motor 2, and the resistor 7 is moved in and out of the circulation circuit of the rice milling machine to adjust the milling pressure on the grains. , the main motor 2 is always in the best condition, e.g. full load or 10% to 20% less.
The vehicle can be operated at increased speeds.
従つて、本発明によれば電源電圧が上昇し、無
負荷時における主モータ２の消費電力が急増して
も、それによつて抵抗装置が作動しなくなるよう
なことがない。 Therefore, according to the present invention, even if the power supply voltage increases and the power consumption of the main motor 2 during no-load increases rapidly, the resistance device will not become inoperable due to this.
その結果、常に米質に適合した最大の精白圧力
が穀粒に加えられるので、精白効率が高く、最良
の精白作業が自動的に出来る。 As a result, the maximum milling pressure suitable for the rice quality is always applied to the grains, resulting in high milling efficiency and the best milling operation possible automatically.
第１図は本発明の縦断面図、第２図は第１図の
要部の拡大図、第３図は主モータの回転数及びす
べりに対するトルクの変化を示す線図、第４図は
本発明の制御回路図である。
２…主モータ、３…送穀ロール、５…垂直循環
回路、７…抵抗体、９…補助モータ、１２…回転
数読取装置、１３…比較回路、１４…駆動回路。
Fig. 1 is a longitudinal sectional view of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a diagram showing changes in torque with respect to the rotational speed and slippage of the main motor, and Fig. 4 is a diagram of the present invention. FIG. 3 is a control circuit diagram of the invention. 2... Main motor, 3... Grain feeding roll, 5... Vertical circulation circuit, 7... Resistor, 9... Auxiliary motor, 12... Rotation speed reading device, 13... Comparison circuit, 14... Drive circuit.
Claims (1)
体を垂直循環回路中に出し入れする補助モータ
と；前記主モータの回転数を計測する回転数読取
装置と；該回転数読取装置の計側値と設定基準値
とを比べる比較回路と；前記補助モータに接続
し、かつ該比較回路の出力により作動する駆動回
路と；を備えた精米機。1. A main motor that drives the grain feed roll; an auxiliary motor that moves the resistor into and out of the vertical circulation circuit; a rotation speed reading device that measures the rotation speed of the main motor; and a reading side value of the rotation speed reading device. A rice milling machine comprising: a comparison circuit for comparing a set reference value; and a drive circuit connected to the auxiliary motor and operated by the output of the comparison circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27642884A JPS61157360A (en) | 1984-12-28 | 1984-12-28 | Rice refiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27642884A JPS61157360A (en) | 1984-12-28 | 1984-12-28 | Rice refiner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61157360A JPS61157360A (en) | 1986-07-17 |
| JPH0232935B2 true JPH0232935B2 (en) | 1990-07-24 |
Family
ID=17569272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27642884A Granted JPS61157360A (en) | 1984-12-28 | 1984-12-28 | Rice refiner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61157360A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7298634B2 (en) * | 2021-03-01 | 2023-06-27 | 株式会社サタケ | grain mill |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6049025B2 (en) * | 1977-09-19 | 1985-10-30 | 株式会社 サタケ | Grain milling machine automatic adjustment device |
| JPS58101741A (en) * | 1981-12-12 | 1983-06-17 | 株式会社 サタケ | Apparatus for automatically controlling whiteness |
-
1984
- 1984-12-28 JP JP27642884A patent/JPS61157360A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61157360A (en) | 1986-07-17 |
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