| 摘要 |
A hammer flange having a hammer shank rotatably attached to one end thereof is mounted on the cut-out portion of a flange rail. A plate spring fixed to the flange rail is extended over the hammer flange and is biased toward the hammer flange, the plate spring having a threaded hole at that part thereof facing the hammer flange. A screw means is screwed into the hole, exerting a pressure on the hammer flange under the biasing force of the spring, so that the hammer flange is securedly mounted on the flange rail.
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