The most important tasks of railway transportation are
improvements of high speed comfortableness, and safety.
Turnouts support those tasks and are essential devices
to operate cars safely under the complicating diagram
Sumihatsu uses automatic equipment (up-to-date equipment
including machining center) to realize automatic production
of large sized products, intending to maintain high accuracy
and performance of devices, as the top manufacturer of
turnouts. Furthermore, Sumihatsu encourage research and
developments for manpower saving of railway maintenance
and automation technology.
Is an important device to safely
manipulate traincars. Sumihatsu deals with
integrated process including design, manufacture,
and assemble of turnouts, and delivers them
Are used widely for Shinkansen,
ordinal railways, cranes, elevators, etc.
Sumihatsu manufactures rail fastenings made
of materials for leaf spring and/or bar spring,
and delivers them locally and abroad.
Is made of unsaturated
polyester penetrated polyurethane foam,
and glass fiber, and formed by metal
mold. It is highly evaluated and accepted
by customers with less noise and vibration.
Diagonal adhesion insulated
rail has been newly developed which
decreases maintenance time (flow removal)
of rail insulation as well as noise
and vibration. This was already installed
at several points and receives good
evaluation from customers.
Two types (for rail and
indirect point) for of parts to avoid
non-conversion by creeping are being
manufactured: one is boltless anti-creeper
to be mounted to rail, and the other
is right angle anti-dislocation jig
to be used at indirect points with other
Has been developed, together
with customers, to decrease maintenance
time of turnout point and to avoid non-conversion.
Ladder type turnout using our own composite
sleeper is being used at test field
for further improvement, as a next generation
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