JPS6471674A - Power tool - Google Patents
Power toolInfo
- Publication number
- JPS6471674A JPS6471674A JP23054187A JP23054187A JPS6471674A JP S6471674 A JPS6471674 A JP S6471674A JP 23054187 A JP23054187 A JP 23054187A JP 23054187 A JP23054187 A JP 23054187A JP S6471674 A JPS6471674 A JP S6471674A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- torque
- display unit
- switch
- fastening
- 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.)
- Pending
Links
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
PURPOSE: To check whether fastening torque for a screw is sufficient or not during use so as to prevent crash and breakage of a thread ridge because of overwinding by arranging a display unit for displaying an output value of a torque sensor. CONSTITUTION: A switch 9 is turned on so as to drive a motor 2, and a signal is outputted from a torque sensor 4 so as to be amplified in an amplifying circuit 17. The signal amplified in the amplifying circuit 17 is compared with a signal from a reference voltage generating circuit 16 by means of a comparing circuit 15. If both signals correspond to each other, a signal is outputted from the comparing circuit 15 to an electronic switch 14 so as to turn off a switch 14, and the motor 2 is stopped. Then, a display switching switch 20 is switched, a signal from the torque sensor 4 is inputted to a display unit 21 via the amplifying circuit 19 and the display switching switch 20, so that an A/D converted torque value is displayed in the display unit 21. Through the display unit 21, a user can visually observe fastening torque in fastening a screw and can easily check whether the torque is sufficient or not.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23054187A JPS6471674A (en) | 1987-09-14 | 1987-09-14 | Power tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23054187A JPS6471674A (en) | 1987-09-14 | 1987-09-14 | Power tool |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6471674A true JPS6471674A (en) | 1989-03-16 |
Family
ID=16909371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23054187A Pending JPS6471674A (en) | 1987-09-14 | 1987-09-14 | Power tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6471674A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006062065A (en) * | 2004-08-30 | 2006-03-09 | Katsuyuki Totsu | Method and device for controlling screw-fastening in electric rotating tool |
JP2018524191A (en) * | 2015-06-30 | 2018-08-30 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Method and power tool for tightening error-proof threaded joints |
CN109108882A (en) * | 2017-06-26 | 2019-01-01 | 中国气动工业股份有限公司 | The torsion control system and its torsion control method of electric impact-type dynamic torque tool |
-
1987
- 1987-09-14 JP JP23054187A patent/JPS6471674A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006062065A (en) * | 2004-08-30 | 2006-03-09 | Katsuyuki Totsu | Method and device for controlling screw-fastening in electric rotating tool |
JP2018524191A (en) * | 2015-06-30 | 2018-08-30 | アトラス・コプコ・インダストリアル・テクニーク・アクチボラグ | Method and power tool for tightening error-proof threaded joints |
CN109108882A (en) * | 2017-06-26 | 2019-01-01 | 中国气动工业股份有限公司 | The torsion control system and its torsion control method of electric impact-type dynamic torque tool |
CN109108882B (en) * | 2017-06-26 | 2021-02-09 | 李育侪 | Torsion control system and torsion control method of electric impact type torsion tool |
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