has been engaged since 1912 in the development of wire and
rope manufacturing technology. Furthermore, in joint efforts
with our customers, various application problems have been
studied, resulting in improvement of the product. The aim
of our many year’s efforts lies in the production
of a rope which is easier in handling and longer in service
Our endeavors have established our position as the rope manufacturer
with the leading technical level.
The ropes invented by our Company are numerous, such as “Sun
Rope” or “Single Rope”. In addition to
ordinary type ropes, our Company is manufacturing other
types, including special ropes like “Locked Coil Rope”,
“OMEGA FILLER ROPE”(the space among two strands
and IWRC is filled with plastic rope) or “TRIPLE COATED
ROPE”(Zn-AI alloy coated rope).
Based on accumulated technological experience and knowledge,
our manufacturing facilities have installed a great quantity
of modern equipment including a 72 inch type rope closing
This is the largest unit of its type in the world. For example,
it is possible to manufacture rope with a diameter of 200mm
and a mass of 115 tons. Our records show that one rope 18000m
in length was manufactured and delivered by our company.
In addition to normal rope applications, our ropes are used
in oceanic exploitation, large buildings, etc…
Our company offers consulting services on special rope, extra-large
diameter rope,etc…These services are required for
application of wire rope and wire in new fields, and our
delivered ropes are enjoying good reputations around the
Unless otherwise specified, all our ropes are subjected to “preform” processing before laying, so that spiral form is given in advance.
Furthermore, in order to improve the strand tightening
condition and strand contacting, the rope is pressed continuously
by surrounding rollers, while laying is applied to the rope.
This is called “postform” processing.
Accordingly, the following features are guaranteed:
Therefore, the load application is not concentrated on specific
wires or strands.
- Even when the rope is cut off without applying a band,
the cut section is not loosened.
- There is very little kinks.
- Since the flexibility is large, it can be wound around
a drum with ease and the sheave diameter can be relatively
- Since durability to the bending is high, service life
of the rope is long.
- Elongation by rope tightening is small while the modulus
of elasticity is high. Since elongation is stabilized, the
load is applied evenly when several ropes are used at the
- The diameter change is small between the time when the
load is applied and it is released. Even when placed under
compression, it is not easily collapsed or broken down.
- The wires and strands hold good contact, and high uniformity
Characteristics of our Manufacturing
We have spared on efforts to modernize and increase the
efficiency of our manufacturing facilities.
The largest production facilities, such as the 72 inch
type rope closing machine, are being used. Also, various
high performance inspection equipment as a 1500 ton press
to attach swaged socket to rope ends, and a pretension facilities.
By use of such facilities, we are making incessant efforts
to develop rope of better handing property and longer service
life. The newest type of manufacturing facilities coupled
with strict quality control, assure the production of rope
with consistent and top quality.