Caterpillar Sarl

Shin Caterpillar Mitsubishi Ltd.

Yoshihisa Kohzu

Norio Nakajima

Hideyuki Miyake

Akito Nakai

Tsuyoshi Doi

Masanori Tsuji

Kazumichi Iwasa

Shunji Ohno

Yoshihiro Agarihama

Shinya Ura

Counterweight device in which an accumulator is disposed inside a counterweight, the work machine connecting the accumulator to piping at the machine body side and capable of moving a machine body or work device even though the counterweight is not attached to the body. A counterweight is fixed to a mount base at the rear end part of a swinging frame, an accumulator installed inside the counterweight by means of a temporary placing support structure. The temporary placing support structure can be temporarily placed on and attached to the end plate at the swinging frame side before attaching the counterweight.

Counterweight device for arranging accumulators inside the counterweight of a working machine

This invention relates to a non-slip structure, which is highly efficient in preventing a slip with no trouble caused by a through hole, thereby enhancing reliability. The non-slip structure of this invention is characterized in that a portion of a metal plate such as a steel plate and the like is sheared so as to form cutting lines (a pair of lateral side cutting lines and a joining cutting line) for forming a protruded piece and, at the same time, the protruded piece is pulled up along the cutting lines to a height, which does not exceed the thickness portion of the steel plate so as to raise the shearing surface (edge), so that the sheared surface does not form a gap nor any through hole in contacting the steel plate.

Non-slip structure

Growing community of inventors

Tokyo, Japan

Yoshihisa Kohzu