Conveyance system and temporary storage method of articles in conveyance system

摘要

In a transport system, a track for a local carriage is provided directly below a track for overhead traveling vehicles, and the overhead traveling vehicles and the local carriage both transfer an article to and from the same transfer destination. A buffer is connected to the track for the transport local carriage to deliver and receive the article to and from the local carriage and includes a transport in/out cell below the track for the overhead traveling vehicles to deliver and receive the article to and from the overhead traveling vehicles, the buffer being provided in a location not directly below the track of the local carriage.

主权项

1. A transport system in which overhead traveling vehicles and a local carriage both transfer articles to and from a same transfer destination, the transport system comprising:
a track for the overhead traveling vehicles; a track for the local carriage that is located directly below the track for the overhead traveling vehicles; a transfer destination located directly below both the track for the overhead traveling vehicles and the track for the local carriage; overhead traveling vehicles configured to travel on the track for the overhead traveling vehicles and including an elevating platform configured to move vertically while supporting an article; a local carriage configured to travel on the track for the local carriage and including an elevating platform configured to move vertically while supporting an article; and a buffer being connected to the track for the local carriage and being configured to deliver and receive the articles to and from the local carriage; wherein
the buffer includes:a plurality of cells configured to accommodate an article, the plurality of cells are aligned in the buffer along an up-down direction to define a plurality of columns of the buffer and along a horizontal direction to define a plurality of rows of the buffer;a transport in/out cell to which the overhead traveling vehicles transport articles to and from, the transport in/out cell being provided below the track for the overhead traveling vehicles, the transport in/out cell being provided in an uppermost row of the plurality of rows of the buffer; anda transport apparatus configured to transport an article between the plurality of cells; the track for the local carriage extends into one cell of the plurality of cells included in the buffer, or the track for the local carriage is directly connected to the one cell of the plurality of cells included in the buffer without extending into the buffer; and at least one column of the plurality of columns of the buffer is not directly below the track for the local carriage.