| 摘要 |
PROBLEM TO BE SOLVED: To provide an adjustable angle jig which can set an arbitrary angle easily and accurately. SOLUTION: A parallelopiped having four equal sides is constituted by using a pair of first straight rulers 20 and a pair of second straight rulers 30. A reference ruler 10 is installed at a diagonal line position. Part positions of the straight rulers which are positioned at the opposing vertexes of the parallelopiped are supported slidably and fixedly in a guide trench 11 of the reference ruler. An angle which is made by two rulers out of the first and second straight rulers and the reference ruler is set as an angle to be obtained.
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