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Title:
MOTOR DRIVEN SCREW DRIVER
Document Type and Number:
Japanese Patent JPH0475879
Kind Code:
A
Abstract:

PURPOSE: To stably perform a uniform thread fastening, by providing a control means which controls a changeover means so that a motor is temporarily reversed during thread fastening.

CONSTITUTION: A changeover means 3 controlled by a control means 1 temporarily reverses a motor 5 during thread fastening. The fitting of a screw and work is performed by this reverse rotation and the uniform thread fastening by a bit 6 is stably performed.


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Inventors:
TANAKA HIROAKI
Application Number:
JP18679390A
Publication Date:
March 10, 1992
Filing Date:
July 12, 1990
Export Citation:
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Assignee:
HAYASHI TOKEI KOUGIYOU KK
International Classes:
B23P19/06; B25B23/14; B25B23/147; (IPC1-7): B23P19/06; B25B23/147
Domestic Patent References:
JPS57114374A1982-07-16
JPS5524853A1980-02-22
JPS5427598A1979-03-01
JPS5248200A1977-04-16
JPS60263676A1985-12-27
JPS6274579A1987-04-06
Attorney, Agent or Firm:
Kiyoshi Takahashi (1 person outside)



 
Next Patent: CONTROL METHOD FOR TIGHTENING NUT RUNNER