オトワコーエイ List of Products and Services

The "Lored Drill Method" was developed as an extremely rational and efficient technique for constructing high-quality piles. By utilizing both screw excavation and down-the-hole hammer excavation with a single machine, and maximizing the advantages of a low center of gravity and compact design, it enables safe, reliable, and speedy construction that meets the demands of the times. It realizes the construction of various piles in various ground conditions. 【Features】 ■ Compact ■ Low center of gravity ■ Flexible ■ Rational and safe construction *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method
• Pile and foundation work

OTO is a disassemblable small pile driver that can be broken down into parts that meet the minimum transportable weight (under 3.0 tons) and is transported to sites where it is difficult to bring in conventional heavy machinery using monorails or helicopters, then assembled on-site. Our company has developed and operates three units of this disassemblable small pile driver, "OTO-TYPE 1/2/3." These machines are making significant contributions to foundation work for power transmission lines in mountainous areas and at sites with narrow spaces or height restrictions, and we are currently developing a fourth model. 【Features】 - Can be disassembled and transported even when large heavy machinery cannot be brought in. - Compatible with a wide variety of construction ground conditions. - Depending on site construction conditions such as height restrictions and spacing, leader lengths of 8.0m or 5.0m can be selected. *There are also compatible models with extended leader specifications. - Despite its compact size, it delivers a rotational torque of 68.6kN even with the standard auger. *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method
• Pile and foundation work

The "KOSMOS Gondola Method" is a construction method that simplifies work and ensures safety during the installation of temporary piers necessary for temporary pier construction. It utilizes the KOSMOS gondola for tasks such as driving support piles and installing suspended scaffolding and beam supports. Furthermore, compared to traditional frame scaffolding and single-pipe bracket scaffolding, it enhances safety, reduces construction time, and lowers costs. It is manufactured based on gondola safety regulations and gondola structural standards. 【Features】 ■ Reduction in workdays and total cost ■ Shortened installation and removal days for scaffolding, as well as construction workdays ■ Simplification of work and reduction of workload, improving safety during installation ■ The gondola can be easily installed on slopes, river crossings, and above water surfaces ■ Fewer design constraints regarding design positions and conditions (excluding headroom restrictions) ■ Improved installation accuracy due to work being conducted on the gondola scaffolding *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method
• Bridge Construction
• Specialized Construction

The multi-drill method uses a lightweight, compact, versatile (multi) pile driver equipped with a low-center-of-gravity rotary table. It can be constructed in locations where full rotation machines cannot be brought in, allowing for close proximity construction. Additionally, it can directly discharge soil into a dump truck, and construction can be performed in areas where grab hammers cannot be used due to noise issues, using a special bucket. 【Special Features】 ■ Construction is possible in locations where full rotation machines cannot be brought in ■ Close proximity construction is possible ■ Direct soil discharge into a dump truck is possible ■ Capable of excavating some debris with strong torque ■ Allows for verticality to be maintained during leader construction *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method
• Pile and foundation work

The "4.9t Mini Crane Multi-Sheave Pile Pulling Machine" is a low-headroom multi-sheave pulling mechanism developed to be used even in narrow job sites, which is typically mounted on larger base machines like 25t rough terrain cranes. Despite being a 4.9t mini crane, it delivers powerful performance. Additionally, it can effectively remove buried retaining piles and steel sheet piles with strong pulling force. 【Features】 ■ Equipped with 31 pulleys of 1.25t at a height of 4.0m ■ Suitable for locations where transporting large base machines is difficult *For more details, please download the PDF or feel free to contact us.

• Pile and foundation work
• Foundation construction machinery

Our company utilizes the OTO drilling machine (a dismantlable small pile driver) and conducts the dismantlable small pile driving method known as the "OTO method." We can transport the equipment to the construction site using a monorail, helicopter, or 3.0t truck, and assemble it on-site for construction. This method is applicable in locations where conventional pile drivers (such as Aboron or three-point types) are difficult to transport, such as mountainous areas or narrow sites. 【Features】 ■ All parts can be disassembled to under 3.0t ■ Applicable for construction in locations where conventional machinery is difficult to transport and operate ■ Selection of leader length is possible ■ Selection of drilling method is possible *For more details, please download the PDF or feel free to contact us.

• Civil Engineering Method
• Temporary Construction