| 摘要 |
<p>977,758. Cutting concrete. INTERNATIONELLA SIPOREX A.B. July 30, 1962 [Nov. 25, 1961], No. 29107/62. Heading B5A. Cellular concrete is cut, whilst still plastic, by supporting it on members 5 carried by a truck T 1 and causing wires 13 to be passed through it. Each member 5 is lowered in turn to allow the lower cutting frame 12 to be passed between it and the concrete. As shown in Fig. 2, hydraulic jacks 14 operate slides 18 which act on members 9 connected to bell cranks 6 which engage the members 5. The cutting frame is mounted on rails 30 and the cutting may take place by keeping the truck T 1 stationary and moving the cutting wires or by keeping the cutting wires stationary and moving the truck T 1 . In a modification, Fig. 4, the members 5 are supported by springs 23 which are released by pulling them outwardly by cams 25 to allow the members 5 to drop by gravity. The members 5 being lifted, after the lower cutting frame has passed, by hydraulic cylinders 14<SP>1</SP>. In a further modification, Fig. 11, the concrete supporting members 32 carried by supports 33 are moved laterally to allow the supports to pass through holes 35 and thus allow the members 32 to drop. The side walls 60 of the mould may be left in position to support the concrete laterally.</p> |
