Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1991-10-03
1993-09-21
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5732, 81 5736, B25B 1300
Patent
active
052458954
ABSTRACT:
A method and apparatus for automatically tightening and untightening bolts which are assembling and fastening devices for a form used in centrifugal compacting and molding concrete products, in which engaging members are brought into engagement with rotary supports which support the form. A bolt tightening and untightening mechanism is moved with the rotary supports, and the bolts are automatically tightened and untightened during the movement thereof. Engaging members are operated more than a dimensional difference of the rotary supports so that even if dimensions of the rotary supports are different according to the kind of the form, the engaging members can be positively engaged with the rotary supports, or the bolt tightening and untightening mechanism is moved up and down in advance so that a height position thereof becomes a predetermined height with respect to the rotary supports.
REFERENCES:
Patent Abstracts of Japan, vol. 9, No. 316 (M-438)[2039], Dec. 12, 1985, & JP-A-60-150-920, Aug. 8, 1985, K. Tsunoda, "Automatic Tightening and Loosening Apparatus for Tightening Screws".
Patent Abstracts of Japan, vol. 9, No. 316 (M-483) [2039], Dec. 12, 1985, & JP-A-60-150-921, Aug. 8, 1985, K. Tsunoda, et al., "Tightening and Loosening Apparatus for Tightening Screws Arranged in Longitudinal Direction of Long . . . ".
Patent Abstracts of Japan, vol. 13, No. 528 (M-898) [3876], Nov. 24, 1989, & JP-A-1-216-806, Aug. 30, 1989, M. Takeda, "Automatic Screwing-In and Out Device of Bolt".
Nakajima Yuji
Narahashi Yoshinori
Sakiyama Kuzuhiko
Yoshida Katsuhiko
Kabushiki Kaisha Kobe Seiko Sho
Meislin D. S.
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