Tōbu 9000 series

Infobox EMU
name = Tōbu 9000 series


imagesize = 240px
caption = First refurbished set, 9102, on test, April 2007
InService = 1981 - Present
Manufacturer = Tokyu Car, Fuji HI, Alna Koki
Family =
Built = 100 vehicles (10 sets)
Refurbishment = 2007 - 2008
Formation = 10 cars per trainset
Operator = Tōbu Railway
Depots = Shinrinkōen
LinesServed = Tōbu Tōjō Line, Tokyo Metro Yūrakuchō Line, Tokyo Metro Fukutoshin Line
CarBody = Stainless steel
CarLength = 20 m
CarWidth =
CarHeight =
MaxSpeed = 100 km/h
Weight =
Capacity =
Acceleration =
Deceleration =
Traction =
Power =
Gauge = 1,067 mm
Voltage = 1,500 V DC overhead
Brakes =
SafetySystem =

The 9000 series is a commuter electric Multiple Unit operated by Tōbu Railway in Japan.

First entering service in 1981 on the Tōbu Tōjō Line, this was the first stainless steel EMU type to be introduced by Tōbu. A total of ten 10-car sets were ultimately built for use on through-running services over the Tokyo Metro Yūrakuchō Line and Tokyo Metro Fukutoshin Line, as well as Tōjō Line services between Ikebukuro and Ogawamachi.

Variants

Prototype set 9101

Built in October 1981, this was the first stainless steel EMU type to be introduced by Tōbu, and featured a bodyline stripe using the same "Royal maroon" colour as previously used on Tōbu 1720 series "DRC" trains.The seats on this set were originally brown, but this was later changed to the standard light green colour.

Production sets 9102-9108

Sets 9102 to 9107 were built in 1987, incorporating a number of minor improvements over the prototype set. Seat width was increased from 425 mm to 450 mm.

An additional set, 9108, was built in 1991, based on the 10030 series lightweight body style.

9050 series VVVF sets

Two 9050 series sets were introduced in December 1994, coinciding with the opening of the "New Line" (now part of Tokyo Metro Fukutoshin Line] between Kotakemukaihara and Ikebukuro. ["Tetsudō Daiya Jōhō" magazine, July 2008 issue, p.42] These incorporated further design improvements and changes similar to the 20050 series trains, notably VVVF control, bolsterless bogies, LED destination indicators, LCD interior passenger information displays, and brown seat moquette. The passenger information displays were, however, removed in 1999.

Refurbishment

From April 2007 to 2008, all of the 9000 and 9050 series sets except prototype set 9101 underwent refurbishment ahead of introduction on Tokyo Metro Fukutoshin Line inter-running services from June 2008. Refurbishment included totally new interiors and cabs based on the 50070 series design. Externally, single-arm pantographs were fitted, and the destination indicator blinds replaced with full-colour LED displays. Prototype set 9101 was not refurbished due to the different door spacing of this set, making it incompatible with the platform doors on the Fukutoshin Line. [Tetsudō Daiya Jōhō Magazine, June 2007 issue, p75] This set is restricted to Tōbu Tōjō Line and Tokyo Metro Yūrakuchō Lineduties, and is distinguished from other members of the fleet by "Y" stickers on the front ends.

References

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