Kobelco Construction Machinery Co., Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Koichi Yamashita

Takashi Tsukiana

Hiroaki Iwamitsu

Kazuhiro Ueda

Takanori Yamasaki

Seigo Arai

Tsuguhito Fujita

Yoshinobu Hosaka

Kazuyuki Saki

Keiji Fujioka

A method and an apparatus efficiently and reliably cut a steel frame. The cutting method includes locating a cutting torch apart from the steel frame held by a holding device in a direction along a cutting surface, moving the cutting torch from a cutting start position to a first cutting end position in a first feed direction perpendicular to a supply direction along the cutting surface, while applying a flame from a fire port of the cutting torch in the supply direction and supplying cutting oxygen to thereby cut a part of the cutting surface, stopping the cutting torch at the first cutting end position and thereafter cutting an uncut part by moving the cutting torch from the first cutting end position in a second feed direction opposite to the first feed direction.

Steel-frame cutting method and device

In a construction machine comprising an engine, hydraulic device, and heat exchanger for cooling the engine and the hydraulic device, which are all disposed in an upper rotating body of the construction machine, there is formed a maintenance passage along which maintenance portions of the engine and the hydraulic device are disposed so as to cross the upper rotating body. Exhaust air from cooling fans for sending air to the heat exchanger is discharged to the exterior of the machine body through the passage. Thus, the passage is utilized as an exhaust air passage for the heat exchanger, whereby it is possible to provide a construction machine improved in cooling efficiency for the heat exchanger.

Construction machine

An air intake structure in a construction machine, comprising a radiator chamber, a radiator ventilating hole formed in an upper position of the radiator chamber, an air cleaner chamber formed in close proximity to the radiator chamber, an air cleaner ventilating hole formed in the ceiling surface of the air cleaner chamber, an intake duct disposed below the air cleaner ventilating hole and communicating with the radiator chamber, and an air cleaner disposed in close proximity to the ceiling surface of the air cleaner chamber at a position close to the intake duct. According to this air intake structure, not only the engine cooling efficiency can be enhanced to a satisfactory extent, but also a lower space in the air cleaner chamber can be fully utilized effectively.

Air intake structure in a construction machine

Growing community of inventors

Hiroshima, Japan

Koichi Yamashita