Patent GB-881516-A (GB)
Title: Scraper conveyors
IPC: E21F13/10
Filed: 1957-12-20
Abstract: 881,516. Scraper conveyers for use in mines; hydraulic jacks. GEWERKSCHAFT EISENHUTTE WESTFALIA. Dec. 20, 1957 [Dec. 29, 1956; Oct. 11, 1957 (2)], No. 39700/57. Classes 78 (1) and 78 (3). In apparatus for shifting and clamping a sectional scraper conveyer framework in a mine, each end of the framework is supported against a transverse beam clamped in position by props between the floor and roof of the mine, whereby the framework is sustained against the contracting action of the tension in the conveyer chains, and hydraulic devices are provided for both relieving the beam of the pressure of the conveyer framework and for shifting the end of the conveyer framework laterally along the beam. In one embodiment, Fig. 1, a pair of cylinders 14, 15 are bolted to a pair of slide plates which are slidable longitudinally on the conveyer end section 10. Clamping jaws 16, 17 are formed on opposed sides of the cylinders for co-operation with a transverse beam 12 supported on props 13 fixed between the floor and the roof. Pistons 20, 21 in the cylinders 14, 15 are connected by rods 18, 19 to a cross member 22 on the beam 12 so that the conveyer end section can be shifted transversely towards or away from the mine face by supplying hydraulic fluid to the appropriate ends of the cylinders. Two further cylinders 23, 24 are secured to the cylinder 15 and contain pistons 25, 26 which are connected by rods 27, 28 to brackets 31, 32 on the conveyer section 10. In operation, the jaw 17 is normally pressed against the beam 12 by the tension in the conveyer chains and clamps the section 10. When the section 10 is to be shifted fluid is supplied to the cylinders 23, 24 to move the cylinders 14, 15 longitudinally of the conveyer until the pressure of jaw 17 against the beam 12 is relieved. The cylinders 14, 15 are then operated to shift the section 10, after which the cylinders 23, 24 are again operated to re-clamp the section 10. In a second embodiment, Fig. 3, the beam 12 is arranged beyond the end of the conveyer section 10 and a trolley 40 including retaining straps 50, 51 is mounted to run along the beam. The piston-rod 38 of a cylinder 37 is mounted on a pin 39 on the trolley, and a link 33 is connected between the cylinder 37 and the end of the conveyer section 10 via two swivel connections 34, 35. A slot is provided in the link 33 to engage over the pin 39. A further cylinder 52 is mounted on the link 33 and has its piston 53 connected by a chain 54 to one of a number of anchorages 55 on the beam. In operation, the cylinder 52 is actuated to shift the trolley 40 when the conveyer is shifted, and the cylinder 37 is actuated to stretch the conveyer framework when it is desired to move the beam 12, this removing the pressure of the trolley on the beam. A hook 56 is provided on a fixed support 59 for engaging a pin 36 on the end of the link 33 to maintain the conveyer framework stretched while the beam is moved. In a third embodiment, Fig. 4, the cylinder 37 is connected between the fixed support 59 and the trolley 40 and the link 33 is connected directly to the trolley. Two further cylinders 69, 70 are mounted on fixed supports 61, 62 carrying the ends of the beam, the beam being mounted for movement longitudinally of the supports 61, 62 by having pins 65, 66 engaging in slots 63, 64 in the supports. The pistons 71, 72 of the cylinders 69, 70 are connected to the pins 65, 66 so that on operation of these cylinders the beam may be moved parallel to itself.