This chuck is specially designed for pulling test of optical fiber. The diameter of the drums is made big in comparison with that of the standard wire winding grip. (on the photo, φ50mm)
In accordance with the 'JIS L 1096 Testing method for woven and knitted fabrics'.
It is a jig performing a pulling examination in a liquid. Here show has a structure that after fixing a sample both from the top and the bottom, the vessel with liquid in it is to be lifted up and the sample is to get into the liquid.
This jig is designed according to the specific shape of a sample, enabling its pulling test.