Viscometer device

A rotary viscometer device including a rotor and a sample cup, the rotary viscometer device comprising:

• a viscometer that includes the rotor, a closure portion having a larger diameter than the rotor, and a guide pin extending in a vertical direction wherein a distance between the closure portion and the guide pin is fixed, and the closure portion and the guide pin are configured to move together only in the vertical direction;
• and
• a temperature control portion that is separate from the viscometer and has
• an in-plane movement portion to regulate an in-plane movement of the temperature control portion so that the temperature control portion is allowed to move only in a width direction and a depth direction both of which are perpendicular to the vertical direction, not moving in the vertical direction,
• a positioning portion that is in a hollow shape with an inner periphery matching an outer periphery of the guide pin, and
• a guide surface that is provided above the positioning portion in the vertical direction, and is an inclined surface of which an inner periphery expands toward the temperature control portion so that the guide surface has an opening at an upper edge that is larger than the inner periphery of the positioning portion, wherein
• the sample cup is provided at the temperature control portion wherein a distance between the sample cup and the positioning portion is fixed, and the sample cup and the positioning portion are configured to move together only in the width direction and the depth direction,
• the sample cup is positioned with respect to the closure portion by inserting the guide pin of the viscometer into the positioning portion of the temperature control portion through the opening of the guide surface while lowering the guide pin, and
• the viscometer includes an in-plane restriction portion that has an inner periphery within which the in-plane movement of the temperature control portion is allowed to move, wherein the inner periphery is wider than the in-plane movement portion in both the width direction and the depth direction, and a width and a depth of the inner periphery of the in-plane restriction portion are configured such that a tip of the guide pin is always placed within the opening of the guide surface in a view from the vertical direction.