Rotation indexing device
The present invention provides a rotation indexing device where a shaft of a rotary joint is configured so that an outlet of a supply path opens to a lower surface of a flange part, a jig plate is formed to have a through-hole in which the flange part of the shaft is arranged and a flow path formed so that an inlet opens to a lower surface of the jig plate, and the jig plate is directly attached to a main shaft. Also, the rotation indexing device includes an adapter that is provided in contact with the flange part of the shaft and the jig plate and has a communication path for communicating the outlet of the supply path in the shaft and the inlet of the flow path in the jig plate each other.
1. A rotation indexing device comprising a main shaft rotatably received in a receiving hole of a frame, a rotary joint comprising a distributor fixedly arranged in the frame and a shaft fitted to the distributor and attached to the main shaft, and a jig unit comprising a jig plate configured to rotationally drive by the main shaft and having a flow path formed therein and a jig mounted on the jig plate so as to connect to an outlet of the flow path,
wherein the shaft has a body part fitted to the distributor and a flange part whose diameter is increased with respect to the body part on one end-side of the body part, and is configured so that an outlet of a supply path communicating with the distributor opens to a lower surface of the flange part,
wherein the jig plate has a through-hole in which the flange part is arranged, an inner diameter of the through-hole being larger than an outer diameter of the flange part of the shaft, and is directly attached to the main shaft, and the flow path is formed so that an inlet opens to a lower surface of the jig plate, and
wherein the rotation indexing device comprises an adapter that has an insertion hole, in which the body part of the shaft is inserted, is arranged to be in contact with the lower surface of the flange part and the lower surface of the jig plate in a state where the body part is inserted in the insertion hole, and has a communication path for communicating the outlet of the supply path in the shaft and the inlet of the flow path in the jig plate each other.
2. The rotation indexing device according to claim 1 , wherein the adapter is fixed only to the main shaft within an existence range of the jig plate in a radial direction of the flange part.