JPS6365833A - Coffee mill - Google Patents

Coffee mill

Info

Publication number
JPS6365833A
JPS6365833A JP20929886A JP20929886A JPS6365833A JP S6365833 A JPS6365833 A JP S6365833A JP 20929886 A JP20929886 A JP 20929886A JP 20929886 A JP20929886 A JP 20929886A JP S6365833 A JPS6365833 A JP S6365833A
Authority
JP
Japan
Prior art keywords
motor
rotation
rotational speed
grinding
increase
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.)
Granted
Application number
JP20929886A
Other languages
Japanese (ja)
Other versions
JPH0720462B2 (en
Inventor
栗林 武麿
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP61209298A priority Critical patent/JPH0720462B2/en
Publication of JPS6365833A publication Critical patent/JPS6365833A/en
Publication of JPH0720462B2 publication Critical patent/JPH0720462B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Tea And Coffee (AREA)
  • Apparatus For Making Beverages (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、粉砕体を駆動するモータの運転時間を1制御
する構成に改良を施したコーヒーミルに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coffee mill that has an improved configuration in which the operating time of a motor that drives a grinding body is controlled once.

(従来の技術) 従来のコーヒーミルの一般的な構成は、粉砕体を駆動す
るモータの運転時間(粉砕時間)を設定するためのタイ
マーを設け、使用者がコーヒー豆の二を目安にして適宜
タイマーを1週節するようになっていた。
(Prior Art) The general structure of a conventional coffee mill is that a timer is provided to set the operating time (grinding time) of the motor that drives the grinding body, and the user can set the operating time (grinding time) of the motor that drives the grinding body as appropriate. The timer was set to set one week.

(発明が解決しようとする問題点) しかしながら、使用者がコーヒー豆の量を目安にしてタ
イマーの設定時間を適正な時間に一致させるのは困難で
ある。このため、粉砕時間を長くしすぎて、電力が無駄
になったり、その運転の終盤に負荷低減によるモータ回
転数の増大で不快騒音を発生したりすることがあり、ま
た粉砕時間を短くしすぎて、粉砕不足になることもあっ
た。
(Problems to be Solved by the Invention) However, it is difficult for the user to match the setting time of the timer to an appropriate time using the amount of coffee beans as a guide. For this reason, if the grinding time is too long, electric power may be wasted, and at the end of the operation, the motor speed increases due to load reduction, causing unpleasant noise.Also, if the grinding time is too short, This sometimes resulted in insufficient pulverization.

本発明はこのような問題点を解消しようとするもので、
従ってその目的は、常に粉砕時間を適正にできて、不快
騒音の発生や電力浪費、粉砕不足等を防止できるコーヒ
ーミルを提供するにある。
The present invention aims to solve these problems,
Therefore, the object is to provide a coffee mill that can always keep the grinding time appropriate and prevent unpleasant noises, power wastage, insufficient grinding, etc.

[発明の構成] (問題点を解決するための手段) 本発明のコーヒーミルは、モータの回転数を検出する回
転検出装置と、この回転検出装置により検出した運転時
の前記モータの定常回転数からの回転数の一1―昇幅が
所定値になったことを条件に前記モータを停止させる運
転制御装置とを設けたものである。
[Structure of the Invention] (Means for Solving the Problems) The coffee mill of the present invention includes a rotation detection device that detects the rotation speed of a motor, and a steady rotation speed of the motor during operation detected by the rotation detection device. The motor is further provided with an operation control device that stops the motor on the condition that the increase in the number of revolutions from 1 to 1 reaches a predetermined value.

(作用) 運転中、コーヒー豆が十分に粉砕されるまでの間はモー
タの回転数(負荷)が略一定となって定常回転となり、
その後粉砕が十分になると負荷が低減してモータの回転
数が4−昇し始める。このようなモータの回転数を回転
検出装置によって検出し、その定常回転数からの回転数
の上昇幅が所定値になったことを条件に運転制御装置に
よってモータを停止させるものである。
(Function) During operation, the rotation speed (load) of the motor remains approximately constant until the coffee beans are sufficiently ground, resulting in steady rotation.
Thereafter, when the grinding becomes sufficient, the load is reduced and the rotational speed of the motor begins to increase by 4. The rotational speed of such a motor is detected by a rotation detection device, and the motor is stopped by an operation control device on the condition that the increase in the rotational speed from the steady rotational speed reaches a predetermined value.

(実施例) 以下、本発明の一実施例を図面を参照して説明する。1
は粉砕ケースで、その内底部に粉砕体2が配設されてい
る。3は粉砕ケース1の下方部に設けた縦軸形のモータ
で、その回転軸3aの上端が粉砕体2に連結され、該回
転軸3aの下端に円筒形の回転表示器4が嵌着されてい
る。この回転表示器4の外周面には、所定本数の縦縞模
様が形成されている。一方、5は電源端子、6はモータ
3への通電路を開閉する電源スィッチ、7は回転検出装
置で、これには前記回転表示器4に投光するための投光
部8と、回転表示器4からの反射光を検知する光センサ
9とが設けられている。これによって、光センサ9から
モータ3の回転数に応じた検出信号が出力されて、運転
制御装置たるマイクロコンピュータ10に入力される。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1
is a crushing case, and a crushing body 2 is disposed at the inner bottom of the case. Reference numeral 3 denotes a vertical shaft type motor provided at the lower part of the crushing case 1. The upper end of the rotating shaft 3a is connected to the crushing body 2, and the cylindrical rotation indicator 4 is fitted to the lower end of the rotating shaft 3a. ing. A predetermined number of vertical stripes are formed on the outer peripheral surface of the rotation indicator 4. On the other hand, 5 is a power terminal, 6 is a power switch that opens and closes the energizing path to the motor 3, and 7 is a rotation detection device, which includes a light projecting section 8 for projecting light onto the rotation indicator 4, and a rotation display. An optical sensor 9 for detecting reflected light from the vessel 4 is provided. As a result, a detection signal corresponding to the rotational speed of the motor 3 is output from the optical sensor 9 and inputted to the microcomputer 10, which is an operation control device.

このマイクロコンピュータ10は、モータ3への通電路
中に設けた常閉形のリレースイッチ11の開放動作時期
を制御することによって、モータ3の停止時期を制御す
るものである。更に、マイクロコンピュータ10は、モ
ータ3の起動から所定時間T(モータ3の回転が略一定
になるまでの時間)経過後に回転検出装置7を動作させ
、略一定の回転数で回転するときのモータ3の回転数を
定常回転数Rsとして記憶した上で、その後検出した回
転数Rと定常回転数Rsとの差、即ち回転数の」二昇幅
を算出し、その上昇幅が所定値ΔRになったことを条件
に、リレースイッチ11を開放動作させるようになって
いる。
This microcomputer 10 controls the timing of stopping the motor 3 by controlling the opening timing of a normally closed relay switch 11 provided in the current supply path to the motor 3. Furthermore, the microcomputer 10 operates the rotation detection device 7 after a predetermined time T (the time until the rotation of the motor 3 becomes substantially constant) has elapsed since the motor 3 is started, so that the motor rotates at a substantially constant rotation speed. After storing the rotation speed of 3 as the steady rotation speed Rs, the difference between the detected rotation speed R and the steady rotation speed Rs, that is, the increase width of the rotation speed is calculated, and the increase width is adjusted to a predetermined value ΔR. The relay switch 11 is opened on the condition that the condition is reached.

次に、−1−記構成の作用について説明する。粉砕ケー
ス1内にコーヒー豆を入れて電源スィッチ6をオンする
と、モータ3に通電されてこれが起動され、粉砕体2が
回転されてコーヒー豆の粉砕が開始される。これによっ
て、モータ3の回転数が第2図に示すように急上昇し、
やがて略一定になる。これ以後、コーヒー豆が十分に粉
砕されるまでは負荷が略一定になるため、モータ3の回
転数は略一定に維持されて定常回転となる。そして、モ
ータ3の起動から所定時間T経過した時点で、マイクロ
コンピュータ10によって回転検出装置7の動作を開始
し、その投光部8から回転表示器4に第1図に一点鎖線
で示すように投光してその反射光を光センサ9で検知す
ることによってモータ3の回転数を検圧する。このモー
タ3の回転数の検出信号はマイクロコンピュータ10に
入力され、略一定の回転数で回転するときのモータ3の
回転数が定常回転数Rsとして記憶される。その後、検
出した回転数Rと定常回転数Rsとの差、即ち回転数の
上昇幅がマイクロコンピュータ10によって算出され、
その上昇幅が所定値ΔRに満たないときはミル運転が続
行される。そして、粉砕が十分になると負荷が低減して
モータ3の回転数が]−昇し始めるため、その直後に回
転数の上昇幅が所定値ΔRに達し、これを条件にマイク
ロコンピュータ10からリレースイッチ11に動作信号
が出力され、リレースイッチ11が開放動作される。こ
れによって、モータ3が断電されて停止し、ミル運転が
終了する。尚、第2図にはモータ3の回転数の変化と騒
音の変化との関係を示してあり、この第2図から明らか
なようにミル運転の終盤でモータ3の回転数の上昇に伴
って騒音も上昇する特性があるが、本実施例ではモータ
3の回転数が大きく上昇する前に停止されるため、騒音
が大きくなることはない。
Next, the operation of the configuration described in -1- will be explained. When coffee beans are placed in the grinding case 1 and a power switch 6 is turned on, the motor 3 is energized and activated, and the grinding body 2 is rotated to start grinding the coffee beans. As a result, the rotation speed of the motor 3 suddenly increases as shown in FIG.
Eventually it becomes almost constant. After this, the load becomes substantially constant until the coffee beans are sufficiently ground, so the rotational speed of the motor 3 is maintained substantially constant, resulting in steady rotation. Then, when a predetermined time T has elapsed since the start of the motor 3, the microcomputer 10 starts the operation of the rotation detection device 7, and the light emitting section 8 transmits the rotation indicator 4 as shown by the dashed line in FIG. The number of revolutions of the motor 3 is detected by projecting light and detecting the reflected light by the optical sensor 9. This detection signal of the rotational speed of the motor 3 is input to the microcomputer 10, and the rotational speed of the motor 3 when rotating at a substantially constant rotational speed is stored as the steady rotational speed Rs. Thereafter, the difference between the detected rotational speed R and the steady rotational speed Rs, that is, the increase in the rotational speed is calculated by the microcomputer 10,
If the amount of increase is less than the predetermined value ΔR, the mill operation is continued. Then, when the crushing becomes sufficient, the load is reduced and the rotational speed of the motor 3 starts to increase. Immediately thereafter, the increase range of the rotational speed reaches a predetermined value ΔR, and on this condition, the microcomputer 10 sends a relay switch. An operation signal is output to 11, and the relay switch 11 is opened. As a result, the motor 3 is cut off and stopped, and the mill operation is completed. Furthermore, Fig. 2 shows the relationship between the change in the rotation speed of the motor 3 and the change in noise.As is clear from this Fig. Although there is a characteristic that noise also increases, in this embodiment, since the motor 3 is stopped before its rotational speed increases significantly, the noise does not increase.

ところで、モータ3の回転数は電源7は圧の変動や製品
間の製造ばらつきの影響を受は易いため、同一の製品で
も製品間で粉砕完了時期の回転数にばらつきが生ずる。
Incidentally, since the rotation speed of the motor 3 is easily affected by pressure fluctuations in the power source 7 and manufacturing variations between products, variations occur in the rotation speed at the time of completion of crushing between products even for the same product.

このため、回転数の絶対値だけでは、正確な粉砕完了時
期を判断てきない。
For this reason, it is not possible to accurately determine when the crushing is complete based only on the absolute value of the rotational speed.

そこで、本実施例では、粉砕が十分になると負荷が低減
してモータ3の回転数が上昇し始めることに着1」して
、回転検出装置7により検出したモータ3の定常回転数
Rsからの回転数の1ユ昇幅が所定値ΔRになったこと
を条件にマイクロコンピュータ10によってモータ3を
停止させるようにしたから、たとえ電源電圧の変動や製
品間の製造ばらつきがあっても、常に粉砕完了時期を正
確に判断できて適正な時期にモータ3を停止できる。
Therefore, in this embodiment, the load is reduced and the rotational speed of the motor 3 starts to increase when the crushing becomes sufficient. The microcomputer 10 stops the motor 3 when the 1 unit increase in rotational speed reaches a predetermined value ΔR, so even if the power supply voltage fluctuates or there are manufacturing variations between products, the grinding will always be possible. The completion time can be accurately determined and the motor 3 can be stopped at an appropriate time.

このため、コーヒー豆を常に過不足なく粉砕できると共
に、モータ3の回転数の増大による不快騒音を発生する
前に確実にモータ3を停止できて低騒音化でき、また電
力か無駄になることもない。
Therefore, coffee beans can always be ground with just the right amount, and the motor 3 can be reliably stopped before unpleasant noise is generated due to an increase in the number of revolutions of the motor 3, reducing noise. do not have.

しかも、従来のような面倒なタイマー操作が不要になる
ため、使い勝手も良くなる。
Moreover, it is also easier to use because the troublesome timer operations required in the past are no longer necessary.

尚、L記実施例では回転検出装置7として光センサ9を
利用した構成のものを用いたが、これに限定されず、例
えば回転遠心力による振り子の変b’/、によって回転
数を検出する構成のものや、モータ3の回転音の周波数
を音波センサによって検知することによりモータ3の回
転数を検出する構成のもの慣であっても良い。
In the embodiment L, a configuration using an optical sensor 9 was used as the rotation detection device 7, but the invention is not limited to this, and the rotation speed may be detected by, for example, a pendulum change b'/ due to rotational centrifugal force. Alternatively, the rotation speed of the motor 3 may be detected by detecting the frequency of the rotation sound of the motor 3 using a sonic sensor.

[発明の効果] 本発明は以上の説明から明らかなように、粉砕が十分に
なるとモータの回転数が一ヒと?シ始めることにi′J
11 して、回転検出装置により検出したモータの定常
回転数からの回転数の上y/幅が所定値になったことを
条件に回転制御装置によってモータを停止させるように
したから、常に粉砕完了時期を11−、確に判断して適
[i:、な時期にモータを停止できて、不快騒音の発生
や電力浪費、粉砕不足等を防11−できると共に、従来
のような面倒なタイマー操作が不要になって使い勝手が
向−1−するという優れた効果を奏する。
[Effects of the Invention] As is clear from the above description, the present invention is capable of reducing the number of revolutions of the motor once the grinding is sufficient. i'J to start
11 Since the motor is stopped by the rotation control device on the condition that the upper y/width of the rotational speed from the steady rotational speed of the motor detected by the rotation detection device reaches a predetermined value, the grinding is always completed. It is possible to accurately judge the timing and stop the motor at an appropriate time, preventing unpleasant noises, wasted power, insufficient grinding, etc., and eliminates the troublesome timer operation required in the past. This has the excellent effect of making it unnecessary and improving usability.

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

図面は本発明の一実施例を示したもので、第1図は全体
の概略構成図、第2図はモータの回転数の変化特性と騒
音の変化特性を示した図である。 図面中、1は粉砕ケース、2は粉砕体、3はモータ、7
は回転検出装置、8は投光部、9は光センサ、10はマ
イクロコンピュータ(運転制御装置)である。
The drawings show one embodiment of the present invention, and FIG. 1 is a schematic diagram of the overall configuration, and FIG. 2 is a diagram showing the change characteristics of the rotational speed of the motor and the change characteristics of noise. In the drawing, 1 is a crushing case, 2 is a crushing body, 3 is a motor, and 7
8 is a rotation detection device, 8 is a light projector, 9 is an optical sensor, and 10 is a microcomputer (operation control device).

Claims (1)

【特許請求の範囲】[Claims] 1、モータによって粉砕体を回転させてコーヒー豆を粉
砕するようにしたものにおいて、前記モータの回転数を
検出する回転検出装置と、この回転検出装置により検出
した運転時の前記モータの定常回転数からの回転数の上
昇幅が所定値になったことを条件に前記モータを停止さ
せる運転制御装置とを設けたことを特徴とするコーヒー
ミル。
1. A rotation detection device for detecting the rotation speed of the motor, and a steady rotation speed of the motor during operation detected by the rotation detection device in a device in which a grinding body is rotated by a motor to grind coffee beans. 1. A coffee mill comprising: an operation control device that stops the motor on the condition that the increase in rotational speed from 1 to 2 reaches a predetermined value.
JP61209298A 1986-09-05 1986-09-05 Coffee mill Expired - Lifetime JPH0720462B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61209298A JPH0720462B2 (en) 1986-09-05 1986-09-05 Coffee mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61209298A JPH0720462B2 (en) 1986-09-05 1986-09-05 Coffee mill

Publications (2)

Publication Number Publication Date
JPS6365833A true JPS6365833A (en) 1988-03-24
JPH0720462B2 JPH0720462B2 (en) 1995-03-08

Family

ID=16570631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61209298A Expired - Lifetime JPH0720462B2 (en) 1986-09-05 1986-09-05 Coffee mill

Country Status (1)

Country Link
JP (1) JPH0720462B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079496A2 (en) 1999-08-25 2001-02-28 Toyota Jidosha Kabushiki Kaisha Abnormality detection apparatus for power supply circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727392U (en) * 1980-07-23 1982-02-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727392U (en) * 1980-07-23 1982-02-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1079496A2 (en) 1999-08-25 2001-02-28 Toyota Jidosha Kabushiki Kaisha Abnormality detection apparatus for power supply circuit
US6605946B1 (en) 1999-08-25 2003-08-12 Toyota Jidosha Kabushiki Kaisha Abnormality detection apparatus for power supply circuit
USRE39212E1 (en) 1999-08-25 2006-08-01 Toyota Jidosha Kabushki Kaisha Abnormality detection apparatus for power supply circuit

Also Published As

Publication number Publication date
JPH0720462B2 (en) 1995-03-08

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