OVERHEAD TRANSPORT VEHICLE

Abstract

An overhead transport vehicle includes a gripper unit that grips an article, a hoist unit that lifts and lowers the gripper unit, and a hoist support unit supporting the hoist unit. The hoist unit is vertically movably mounted on the hoist support unit, and an anti-vibration member is interposed between the hoist support unit and the hoist unit.

Description

Claims

1. An overhead transport vehicle comprising: a gripper unit configured to grip an article;a hoist unit configured to lift and lower the gripper unit; anda hoist support unit supporting the hoist unit, wherein the hoist unit is vertically movably mounted on the hoist support unit, andan anti-vibration member is interposed between the hoist support unit and the hoist unit.

2. The overhead transport vehicle according to claim 1, wherein the hoist unit is vertically movably mounted on the hoist support unit with a parallel link interposed between the hoist unit and the hoist support unit.

3. The overhead transport vehicle according to claim 2, wherein the parallel link includes a first end mounted on the hoist support unit with a first shaft and a second end mounted on the hoist unit with a second shaft, anda rubber bushing serving as the anti-vibration member is provided in at least one of a space between the first end and the first shaft and a space between the second end and the second shaft.

4. The overhead transport vehicle according to claim 1, further comprising: a lateral movement mechanism configured to laterally move the hoist unit, wherein the hoist unit is equipped with a sensor configured to detect whether the article is placed on a storage shelf based on projected-light onto and received-light from a reflecting plate mounted on the storage shelf, andthe lateral movement mechanism laterally moves the hoist unit when the received-light from the reflecting plate is not detected.

5. The overhead transport vehicle according to claim 2, further comprising: a lateral movement mechanism configured to laterally move the hoist unit, wherein the hoist unit is equipped with a sensor configured to detect whether the article is placed on a storage shelf based on projected-light onto and received-light from a reflecting plate mounted on the storage shelf, andthe lateral movement mechanism laterally moves the hoist unit when the received-light from the reflecting plate is not detected.

6. The overhead transport vehicle according to claim 1, further comprising: a lateral movement mechanism configured to laterally move the hoist unit, wherein the hoist unit is equipped with a sensor configured to detect whether the article is placed on a storage shelf based on projected-light onto and received-light from a reflecting plate mounted on the storage shelf, andthe lateral movement mechanism laterally moves the hoist unit when the received-light from the reflecting plate is not detected.