| 摘要 |
A vertical movement and fixture device to be used for, for instance, a dental tomograph for photographing entire jaw including a vertical support having a vertical groove inside, a block base which is slidably fit in the groove and is fixed to a slider and a means for fixing and releasing the block base at any desired position in the groove, the means for fixing and releasing the base block comprising a horizontal shaft, a pair of links each one end of which is swingably connected to one end of the horizontal shaft respectively, a pair of brake shoes which are respectively secured to the other ends of the links, and an operation member which supports and vertically moves the other end of the horizontal shaft. According to the device, the block base can be firmly fixed to and released from the support simply by applying slight control force and the cost of the device is low since its construction is entirely mechanical. Therefore, the device of the present invention is far more advantageous than conventional devices.
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