Mitsubishi Heavy Industries Technical Review Vol. 47 No. 2 (June 2010)
12Universal Design Passenger Boarding Bridge

M i ts u b i s h i H e a vy I n d u s t r i e s
Tr a n s p o r ta t i o n E q u i p m e n t
E n g i n e e r i n g & S e r vi c e C o . , L td .
To s h i r o F u s h i y a
I k u r o M i ta r a i|1. Introduction
The passenger boarding bridge (PBB), a device used to provide safe passenger accessbetween an airport terminal and a plane, is used extensively in airports around the world. Its basic
structure has changed very little since its inception almost half a century ago. The very nature of
the telescoping tunnels involved means differences in floor levels that prevent barrier-free accessfor passengers.
Mitsubishi Heavy Industries Transportation Equipment Engineering and Service Co., Ltd.
has overcome this drawback of conventional PBBs with a new universal design that provides safe
passenger access and completely eliminates any floor-level variations in the tunnels. This new
design will be used in the new international passenger terminal at Tokyo International Airport(Haneda). Twenty-one units are currently in production and are scheduled for delivery in July2010.
Because countries such as Thailand, Indonesia, and China also manufacture PBBs, thecompetition is rather stiff. The new universal design PBB is a strategic advance for Mitsubishi thatsets the company apart from its competitors in pursuit of global market share.

|2. Design overview
A conventional PBB is formed using a telescopic structure of inner and outer tunnels, toadjust to various lengths. The difference in the floor levels of the two tunnel sections can bemitigated somewhat by placing a ramp at the transition point. However, the slope of the ramp still
poses a barrier to mobility.
The universal design PBB eliminates this obstacle with a unique new structure that maintains
a constant floor height throughout the tunnel corridor, an accomplishment previously considered to
be structurally impossible. The design also eliminates the rainwater gutters on both sides of theouter tunnel, which also create further obstacles for passengers. The barrier-free PBB hassignificantly improved the safety of passengers boarding and disembarking from an aircraft.
(1) The universal design PBB uses a skid conveyor structure commonly used for moving
walkways to eliminate the difference in levels between tunnels (Figure 1).

Figure 1

Comparison of universal design PBB with conventional PBBMitsubishi Heavy Industries Technical Review Vol. 47 No. 2 (June 2010)13(2) The universal design not only eliminates the level gap between the tunnels but also provides awider corridor, which is realized by elimination of the rainwater gutters on both sides(Figure 2).

Figure 2 Tunnels and floor plate connection
The barrier-free space with no ramp or rainwater gutters provides a clean and neatappearance.

|3. Product development and commercialization process
Following the construction of a prototype based on development specifications, ademonstration of the universal design PBB was held at the Mihara Plant for domestic PBB clientsand other stakeholders such as airport terminal operators and consultants. The product performance
was further enhanced by incorporating a wide range of user feedback into the design (Figure 3).
Only one year after the start of development, the universal design PBB received high acclaim
from Tokyo International Terminal, Inc. and led to a contract for 21 units for the international
passenger terminal at Tokyo International Airport, including one model slated to be used forsecond-floor access to double-deck Airbus A380 aircraft. This particular model, with a floor heightof 7.8 meters at the tip instead of the standard 5.4 meters, features a four-wheel mechanism insteadof the standard two wheels to avoid inadvertent contact with the body of an aircraft caused by therolling motion during bridge extension (Figure 4).

Figure 3

Mitsubishi stepless PBB

Figure 4

Mitsubishi stepless
Airbus A380-compatible PBB|4. Future business development(1) Demand for aircraft PBBs is predicted at approximately 10 to 15 units per year in thedomestic market and 50 units per year in the Asian market. The universal design PBB isconsidered to be one of the highly-anticipated features of the new international passenger
terminal at Tokyo International Airport, which opens in October 2010. As such, it isexpected to generate excellent product exposure with airport-related service providers
worldwide. Performance of the universal design PBB at the terminal will be used as aMitsubishi Heavy Industries Technical Review Vol. 47 No. 2 (June 2010)14

stepping stone to expand sales in both domestic and overseas markets.
(2) As part of the overseas market expansion efforts, globalization of the universal design models
will be actively pursued through technical collaboration. As the operations and maintenanceservice provider for Mitsubishi Heavy Industries’ APM (Automated People Mover) systems
at major airports worldwide, Mitsubishi Heavy Industries Transportation Equipment
Engineering and Service also aims to increase sales of universal design PBBs by offering
comprehensive after-sales service that includes PBB-related maintenance.
(3) Future development efforts include the application of the universal design PBB to oceanvessels.

|5. Conclusion
The basic structure of PBBs has changed very little in the last 50 years. However, the world's
first universal design PBB is based on a completely new concept, developed in response to thegrowing demand for barrier-free access, and is not merely an extension of existing designs.
While the universal design PBB will soon enter service at the new international passenger
terminal at Tokyo International Airport, which opens in October 2010, another project is currently
being finalized and sales expansion efforts are underway. Further comprehensive sales efforts will
focus not only on domestic airports but also on airports worldwide, using the opening of the Tokyo
terminal as the initial stepping stone.