Patent GB-847094-A (GB)
Title: Improvements in or relating to a surface conditioning mechanism
Inventor: PETERSON RUBEN OLOF
IPC: B24B41/00
Filed: 1957-01-02
Abstract: 847,094. Grinding, buffing, brushing. OSBORN MANUFACTURING CO. Jan. 2, 1957, No. 243/57. Class 60. A machine for surface conditioning has an outer housing which is vertically adjustable in a supporting frame and carries detachably within itself an inner housing, which inner housing has within it a shaft-mounted rotary surface conditioning tool so mounted that the shaft can be disengaged from drive means therefor on the outer housing and so as to allow the inner housing, shaft and tool to be withdrawn lengthwise through an open side of the outer housing, and in which the shaft can be disengaged and removed with the tool from the inner housing after the latter has thus been withdrawn from the outer housing, both said housings being open in the same direction when assembled to expose the tool for engagement with the work. A brushing stand comprises vertical posts 1, 2, 3, 4 joined at the top by a frame 5 and at the bottom by a similar frame. Slides 6, 7 are mounted for vertical movement between posts 1, 2 and 3, 4, the slides being moved simultaneously by worm gear units 7, 9 driven by an electric motor 13. An outer housing 14 is mounted for vertical movement in the slides 6, 7, being adjustably suspended from brackets 19, 20 on the slides by threaded rods 21, 22 pivotally connected to the housing and engaging nuts 23, 24 by adjustment of which the housing 14 can be slightly tilted. An inner housing 25 is longitudinally slidably inserted within the outer housing 14, the inner housing 25 having side rails 26, 27 engaging between sets of upper and lower rollers 28, 29 on the outer housing 14. One end of the outer housing 14 is closed by end plates 30, 31 in which is secured a bearing 32 in which is journalled a hollow stub shaft 33 on which pulley 34 is mounted. A cylindrical rotary brush 35 is mounted on a shaft 36 journalled in bearings 37, 38, 39 carried by the inner housing 25. One end of shaft 36 is received within the hollow stub shaft 33 in keyed or splined engagement therewith so that brush 35 may be driven through pulley 34. Shaft 36 is disengaged from stub shfat 33 by axial withdrawal therefrom when the inner housing 25 is withdrawn longitudinally from the outer housing 14. Such withdrawal is normally prevented by removable pin 40. passing through lugs 60 on outer housing 14 and extensions 61 on inner housing 25 and by removable pin 41 with a tapered end passing through a swinging latch member 42, pivotally connected to the outer housing at 43, and through apertures in spaced vertical flanges 44, 45 extending from the end of inner housing 25, the pins 40, 41 also accurately locate the housing 25 within the housing 14. A removable cross piece 46 bridges the lower end of outer housing 14. To remove the brush unit for inspection, conditioning or replacement of the brush, cross-piece 46 and pins 40, 41 are removed, latch 42 is swung upwardly and the inner housing 25 is slid out ; apertures 53, 54 in upstanding flanges on the inner housing 25 permit attachment to an overhead crane to facilitate handling. The bearings 37, 38 are carried by a part 50 pivotally mounted between the flanges 44, 45 of the inner housing 25 for swinging movement about an axis 51. The bearing 39 may be a split bearing. After removal of the housing 25 from the outer housing 14 one end of the shaft 36 is recessed from split bearing 39 ; if an ordinary bearing is used it is unbolted from the housing 25 and withdrawn from the end of the shaft. The shaft 36 is then swung about the pivot 51, the end of the housing 25 being slotted at 52 to permit this, and is withdrawn from the bearings 37, 38. A pin may be inserted in holes in flanges 44, 45 and holes 62 in the part 50 to hold the latter in pivoted position during withdrawal of the shaft. Inner housing 25 has rows of apertures 55 in its upper surfaces and rows of holes 58 in inner braces 56, 57. The upper surface of outer housing 14 has a central opening 59 for connection of a large suction hose. The work, such as continuous steel strip S, is held in engagement with the brush 35 by rollers 47, 48 (which are preferably cylindrical brushes having high bristle density) carried by a slide 49 which can bo raised or lowered by means such as a piston-cylinder assembly quickly to bring the work into or out of engagement with the brush 35. The brush stand may be provided in inverted position to brush the underside of the work, or the work may be turned over and again passed beneath the brush. The stand may be mounted on its side or at an angle to cause the brush to engage work travelling in some plane other than horizontal. Other rotary tools, such as buffs or grinding wheels may be used in place of brushes.