JPH0260U

JPH0260U -

Info

Publication number: JPH0260U
Application number: JP7461388U
Authority: JP
Priority date: 1988-06-03
Filing date: 1988-06-03
Publication date: 1990-01-05
Anticipated expiration: 2003-06-03
Also published as: JPH0719706Y2

Description

[Brief explanation of the drawing]

第１図は、本考案による研磨機の側面図、第２
図は正面図であり、第３図は本考案の制御回路の
一実施例を示ブロツク回路図、第４図は第３図中
ａ〜ｎに対応するタイムチヤート図である。図に
おいて、１は可逆電動機、２は減速機、３はピニ
オン、４はラツク、５は刃物、６は刃物台、７は
ベース、８，９は検出片、１０は左端検出センサ
、１１は右端検出センサ、１２は砥石駆動用電動
機、１３は砥石、１４，１５，１６はリレーコイ
ル、１７は進相コンデンサ、１８は回転検出セン
サ、１９は運転スイツチ、２０，２８はオアゲー
ト、２１はフリツプフロツプ、２２，２３，２９
はアンドゲート、２４，２６，２７はタイマ、２
５はリトリガブルタイマ、１４ａ，１５ａ，１６
ａは常開接点である。 Fig. 1 is a side view of the polishing machine according to the present invention;
This figure is a front view, FIG. 3 is a block circuit diagram showing one embodiment of the control circuit of the present invention, and FIG. 4 is a time chart corresponding to a to n in FIG. 3. In the figure, 1 is a reversible motor, 2 is a speed reducer, 3 is a pinion, 4 is a rack, 5 is a blade, 6 is a tool rest, 7 is a base, 8 and 9 are detection pieces, 10 is a left end detection sensor, 11 is a right end Detection sensor, 12 is a grindstone drive electric motor, 13 is a grindstone, 14, 15, 16 are relay coils, 17 is a phase advance capacitor, 18 is a rotation detection sensor, 19 is an operation switch, 20, 28 are OR gates, 21 is a flip-flop, 22, 23, 29
is an AND gate, 24, 26, 27 are timers, 2
5 is a retriggerable timer, 14a, 15a, 16
a is a normally open contact.

Claims

[Scope of utility model registration request]

A tool rest for holding a cutter is slidably mounted on the base, and the cutter and a grindstone driven by an electric motor are configured to move toward and away from each other, and the tool rest is reciprocated when the cutter and the grindstone are in contact with each other. A polishing machine that performs the required polishing has a mechanism for reciprocating the tool rest by a reversible electric motor via a transmission means such as a pinion rack, and is provided with a detector for regulating the reciprocating range of the tool rest. forward/reverse switching means for switching the direction of rotation of the reversible motor between forward rotation and reverse rotation in response to a signal from the reversible motor; rotation detection means for emitting an electric signal corresponding to the rotational speed of the reversible motor; a determination circuit for determining the speed; and a timer circuit for receiving a signal from the detector and compensating the determination circuit for a certain period of time when switching the rotation direction of the reversible motor; A blade protection device for a polishing machine, characterized by cutting off power to a grindstone driving electric motor.