Patent ID: 11892500
Assignee: SEMES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 19:
20. An elevator unit for transferring a tray, the elevator unit comprising:
a first tray guide block on which the tray is seated;
a second tray guide block on which the tray is seated and which is positioned above the first tray guide block in a height direction;
a first wrapping connector driving member connected to a side surface of the first tray guide block to elevate and lower the first tray guide block;
a second wrapping connector driving member spaced apart from the first wrapping connector driving member in a horizontal direction and connected to a side surface of the second tray guide block to elevate and lower the second tray guide block;
a fixed fastener mounted to each of the first tray guide block and the second tray guide block; and
a compensation fastener mounted on each of the first wrapping connector driving member and the second wrapping connector driving member, connected to the fixed fastener corresponding thereto, and rotating around the fixed fastener corresponding thereto as a center so that a direction of force applied to each of the first tray guide block and the second tray guide block according to a movement direction of each of the first wrapping connector driving member and the second wrapping connector driving member is corrected.