US 9,809,433 B2
Stacker crane
Hiroshi Tanaka, Inuyama (JP); and Yumiko Komada, Inuyama (JP)
Assigned to MURATA MACHINERY, LTD., Kyoto (JP)
Appl. No. 14/891,145
Filed by MURATA MACHINERY, LTD., Kyoto-shi, Kyoto (JP)
PCT Filed Mar. 7, 2014, PCT No. PCT/JP2014/001307
§ 371(c)(1), (2) Date Nov. 13, 2015,
PCT Pub. No. WO2014/184990, PCT Pub. Date Nov. 20, 2014.
Claims priority of application No. 2013-104559 (JP), filed on May 16, 2013.
Prior Publication US 2016/0096711 A1, Apr. 7, 2016
Int. Cl. B66F 9/07 (2006.01); B65G 1/04 (2006.01)
CPC B66F 9/072 (2013.01) [B65G 1/04 (2013.01); B65G 1/0407 (2013.01); B66F 9/07 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A stacker crane comprising:
a travel unit that moves along a shelf that stores a load;
a transfer unit that transfers the load to the shelf;
a mast extending vertically and attached to the travel unit;
an ascending and descending unit that slides along the mast and moves the transfer unit vertically;
a first covering body covering a sliding section of the mast and the ascending and descending unit, and providing a first space extending vertically along the mast;
a second covering body providing a second space extending vertically along the mast, the second space being partitioned from the first space by a first barrier;
a plurality of exhaust holes that are vertically dispersed in the first barrier and cause the first space and the second space to be in communication;
an exhaust device that is attached to the mast and expels air in the second space; and
a second barrier that extends vertically and provides a third space and a fourth space by horizontally partitioning the first space; wherein
the exhaust device includes an intake port located closer to the third space than the fourth space;
the plurality of exhaust holes include a plurality of first exhaust holes that cause the third space and the second space to be in communication, and a plurality of second exhaust holes that cause the fourth space and the second space to be in communication; and
an airflow resistance of the plurality of first exhaust holes is higher than an airflow resistance of the plurality of second exhaust holes.