Various companies have developed simple bike trees, including ones for sale at a hardware store, such as Harbor Freight Tools, that have hooks to hang 5 bicycles.
A Swiss company, Bike Tree International, designed a system whereby a bicycle can be hoisted into a tree-shaped device after lifting the front of the bike and connecting the wheel to a hook by rope. There were plans to deploy this machine in Geneva. It can handle one or two dozen bicycles.1
A similar but much larger device, an automated storage and retrieval system, has been developed by JFE Engineering, a unit of JFE Holdings of Japan. The first bike tree of this type became available for public use in 2006, storing 1,476 bicycles using an integrated circuit based tag system, cleanly stored away above ground in an urban office-like building.2 Mechanical units have been expanded to hold some 6,480 bicycles, for which retrieval time is 23 seconds,3 such as in this 15 meter deep underground storage facility. Various municipalities in the Greater Tokyo area run the system or are planning to install them, charging 1800 yen per month for storage or a one time fee of 100 yen.4 As of February 2013, some 85 systems of this manufacturer and type in use can hold 17,323 bicycles, all in Japan.5
"Bike Tree International Website". Archived from the original on 4 January 2010. Retrieved 9 November 2009. https://web.archive.org/web/20100104181304/http://www.biketree.com/ ↩
"JFE CYCLE TREE: Multi-level Mechanical Bicycle Parking System". Archived from the original on 9 November 2009. Retrieved 9 November 2009. https://web.archive.org/web/20091109033830/http://www.jfe-eng.co.jp/en/en_product/environment/environment2134.html ↩
Munk, David (5 November 2009). "Has Japan designed the world's best bike shed?". Retrieved 18 November 2023 – via The Guardian. https://www.theguardian.com/environment/green-living-blog/2009/nov/05/japan-best-bike-shed ↩
"Multilevel bicycle parking system Cycle Tree | Industrial Machinery | Products & Services | JFE Engineering Corporation". http://www.jfe-eng.co.jp/en/products/machine/logistics/lo09.html ↩