To reduce the area occupied by a small assembly line, while securing the structural strength of a receiving roller.

In this receiving roller 6, an upright roller 61 having a vertical axis rolls and guides the movement of a conveying hanger H while in engagement with a vertical guide rail GR1, and a transverse roller 62 having a horizontal axis rolls on a transverse guide rail GR2 to support engagement of the upright roller 61 with the vertical guide rail GR1. In a structure for preventing disconnection of the receiving roller 6 to prevent the transverse roller 62 from being disconnected from the transverse guide rail GR2, the ratio of the latching area rear end length D1 of the transverse roller 62 when the upright roller 61 has reached the displacement point P1 of the vertical guide rail GR1 to the latching area rear end length D2 of the transverse roller 62 which moves on a linear movement part SL is within the range of 30 to 40%.