Title:
AUTOMATIC SCREWDRIVER
Document Type and Number:
Japanese Patent JP3283019
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that it cannot be found by an automatic screwdriver for tightening a screw in accordance with angle rules that a female screw is destroyed by the excessive tightening of a screw.
SOLUTION: An automatic screwdriver has a control unit 5 in which a target rotating angle of a screw to be tightened with preset-range tightening torque and an idling current value corresponding to torque produced when a female screw for a work is destroyed and idling are stored to provide for tightening of a screw until the rotating angle of a motor 2 reaches a target rotating angel, detection of a current value for the motor 2 by a current detecting part 12 and comparison with an idling current value.
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Inventors:
Yukihiro Umehara
Yasuyuki Kitamura
Yasuyuki Kitamura
Application Number:
JP28027099A
Publication Date:
May 20, 2002
Filing Date:
September 30, 1999
Export Citation:
Assignee:
Nitto Seiko Co., Ltd.
International Classes:
B23P19/06; B25B23/14; (IPC1-7): B23P19/06; B25B23/14
Domestic Patent References:
| JP7124827A | ||||
| JP475881A | ||||
| JP6471673A | ||||
| JP6074966U |
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