JPS6471674A - Power tool - Google Patents

Power tool

Info

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
Application number
JP23054187A
Other languages
Japanese (ja)
Inventor
Yoshinobu Sakamura
Masao Kubo
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP23054187A priority Critical patent/JPS6471674A/en
Publication of JPS6471674A publication Critical patent/JPS6471674A/en
Pending legal-status Critical Current

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.
JP23054187A 1987-09-14 1987-09-14 Power tool Pending JPS6471674A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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