US 5,245,895 AGranted

Method and apparatus for automatically tightening and untightening a bolt

AssigneeKabushiki Kaisha Kobe Seiko Sho

InventorsKatsuhiko Yoshida, Yoshinori Narahashi, Yuji Nakajima, Kuzuhiko Sakiyama

Life of this patent

Estimating the term…

Loading patent…

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.

Claims7

Dependent claims

A bolt automatic tightening or untightening apparatus for automatically tightening or untightening bolts provided along an axial direction of a divisible cylindrical form having annular rotary supports which project from an outer peripheral surface of the form, said bolts being spaced from said supports by a predetermined axial distance, said apparatus comprising:

a frame;
means for moving the form through said frame;
an automatic tightening or untightening apparatus body movably supported on said frame;
at least one bolt tightening an untightening device mounted on said apparatus body;
engaging means mounted on said apparatus body, said engaging means comprising a drive mechanism for driving the engaging means into engagement with said form, said engaging means comprising a roller means which contacts said form and rolls along the axial direction of said form when said form is moved by said form moving means through said frame, such that said rotary support of said form contacts said roller means for moving the apparatus body and the form together relative to said frame;
and
means for moving said bolt tightening and untightening device toward said form and away from said form so as to tighten or untighten said bolts for permitting the assembly or disassembly of said form.

4 more elements

Dependencies are inferred from the claim text.