Kobelco Construction Machinery Co., Ltd.

Ichiro Wada

Yukio Miyano

Shinji Yamashita

Hiroki Tanaka

Tsuguhito Fujita

Tomonori Kidani

Shigeki Kuramoto

A first pinhole is formed in a first member in a section facing a second member. A second pinhole is formed in the second member in a section facing the first member. A connecting pin is inserted into the first pinhole and the second pinhole from the side of the machine center. A coming-off prevention mechanism includes a coming-off prevention lever. The coming-off prevention lever can abut the inner end surface of the connecting pin. The coming-off prevention lever is supported by the second member to be able to move between an abutting position of abutting the inner end surface of the coupling pin and a non-abutting position of not abutting the inner end surface.

Construction machine

A pipe protection unit includes: at least one inner low-pressure pipe which is a hydraulic pipe disposed along an attachment side surface which is one of a left side surface and a right side surface of a work attachment; at least one outer high-pressure pipe disposed along the attachment side surface at an outer position than the at least one inner low-pressure pipe, the at least one outer high-pressure pipe having an outer diameter larger than an outer diameter of the at least one inner low-pressure pipe; and a cover plate which is a plate that is disposed along the attachment side surface so as to be interposed between the at least one inner low-pressure pipe and the at least one outer high-pressure pipe and is supported by the work attachment, the cover plate covering at least a part of the at least one inner low-pressure pipe.

Pipe protection unit in work machine

A boom mount device of a construction machine can easily align a boom with an upper frame of the construction machine when mounting the boom on the upper frame. The upper frame includes a center section including one pair of left-and-right vertical plates. The vertical plates include outside surfaces facing outside and guide parts disposed on the outside surfaces and guide holes are formed. An adapter that pivotably connects a base end of the boom and a base end of a boom cylinder is mounted on the base end side of the boom. The adapter includes one pair of left-and-right guide pins. When the boom is mounted on the upper frame, the one pair of left-and-right guide pins is inserted into the guide holes of the one pair of left-and-right guide parts.

Construction machine boom mount device

An attachment of a work machine includes first and second attachment bodies connectable to each other quickly and easily. The first attachment body includes first side plates including first projecting portions formed with notches, and the second attachment body includes second side plates including second projecting portions and a fitting pin inserted through the second projecting portions. The interval between the first side plates is larger than the interval between the second side plates. The first and second attachment bodies are interconnected while the first projecting portions are disposed outside the second projecting portions, and the parts of the fitting pin protruding outward beyond the second projecting portions are fitted with the notches.

Attachment for work machine

A work attachment is capable of performing work at a high place while restricting the driving force required to lift the work attachment from its fallen posture in a folded state. The work attachment includes a main boom, a first insert boom and a second insert boom to be selectively used, an intermediate boom, an arm, and a distal working device. The intermediate boom has bendable first and second joints. The second insert boom has a fixed shape. The first insert boom is bent to project upward at a middle joint in the fallen posture, thereby making the center of gravity of the work attachment closer to a boom rotation center axis.

Growing community of inventors

Hiroshima, Japan

Ichiro Wada