Continuous sliding support gantry for a large passage
AssigneeCharbonnages de France
InventorsGuy Blanpain, Pierre Grandfils
Life of this patent
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Abstract
A gantry support for supporting a roof of a passage includes two parallel supporting units each having a lower frame provided with articulated tracks and an upper frame carried by props and two cross-members. The two cross-members carry an intermediate upper frame in the form of a beam which is slidable on guide elements and adapted to be clamped to the roof by small jacks. As the support advances the beam remains clamped against the roof of the passage until the beam reaches an end stop. The small jack is then released and the beam slidably advanced along the guide elements by means of a further jack.
Claims11
A roof support in the form of a gantry for supporting a roof of a passage and advanceable along a floor of such passage, the support comprising:
- (a) at least three parallel upper frames including two lateral frames and at least one intermediate frame, at least one of which frames comprises a straight beam;
- (b) at least two lower frames each provided with an articulated track;
- (c) jack means operable to clamp at least one of the upper frames against the roof of the passage;
- (d) means for transmitting advancing forces of the support from the lower frames to the upper frames;
- (e) at least two cross-members extending between the lateral frames and carrying the upper frames;
- (f) guide means carried by the cross-members and supporting the at least one beam for slidable displacement thereof longitudinally of the support when said one beam is clamped to the roof between the rock and said guide means;
- and
- (g) means for sliding the at least one beam.
Dependencies are inferred from the claim text.