| 摘要 |
PURPOSE:To easily form a load cell which has no characteristic deterioration with high accuracy by fitting both ends of a ceramics plane plate where strain gauges are formed to a fixed body and a load receiving body by shrinkage. CONSTITUTION:The four strain gauges 5 which are bridge-coupled with one another are stuck on the top and reverse surface of the deformation part 4 of a flat plate type strain inducer 1 made of ceramic of Al2O3, etc. One end of this strain inducer 1 is coupled with the coupling groove 7 of the fixed body 6 by shrinkage fitting and the other end is coupled with the coupling groove 11 of the load receiving body 10 by shrinkage fitting to form a load cell main body. Then when a load is placed thereupon on a load receiving hole 12, the load cell deforms as shown in a figure and the resistance values of the strain gauges 5 vary, so that an electric signal corresponding to the load is obtained. Consequently, even when the main body is made of ceramics, the load cell having no deterioration in characteristics is formed with high accuracy at low cost because of the shrinkage fitting.
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