Device for the guiding and positioning of support plates on a de

Details Device for the guiding and positioning of support plates on a de Device for the guiding and positioning of support plates on a de

1987-10-26

1989-07-11

Corbin, David H.

Hydraulic and earth engineering

Miscellaneous

405288, F21D 1140

Patent

active

048466077

ABSTRACT:
Support plates used in so-called rock bolting for supporting the roof in an underground excavation, such as a tunnel or mine, are positioned initially by a parallelogram bar structure that is attached to a moveable shield that is moveable upwardly toward the roof by lifting cylinders. Two bar structures are arranged side-by-side and each has at one end a shoe that includes support plate positioning surfaces and at least one shoe has a centering pin that automatically locates and centers the support plate. Upon placing a support plate on the shoes and determining that the excavation roof is of a sufficient height, the two bar structures are pivotted upwardly, which turns the support plate parallel to the roof and by means of the lifting pistons the support plate is firmly pressed against the roof so that automatic anchor placement or rock bolting is facilitated.

REFERENCES:
patent: 4252475 (1981-02-01), Cobb et al.
patent: 4351625 (1982-09-01), Selestam et al.

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