Hitachi Construction Machinery Co., Ltd.

Hitachi Construction Machinery Tierra Co., Ltd.

Tomoyuki Tanaka

Shogo Kimura

Shigehisa Hagura

Tomoyuki Miyata

Hiroshi Tabeta

Kazuhiko Hiraoka

Hajime Ishii

Junya Kawamoto

Akira Saito

Teruo Irino

Katsuhiro Sasaki

Kohei Urase

Shougo Kimura

Keiji Ahiko

Yasuo Ooshima

Masashi Setaki

Naoki Takeoka

Makoto Motozu

Shigeru Hirasawa

Seiichi Kihara

Hiroki Tanaka

Osamu Kokuryou

Hiroshi Kanai

Takashi Higuchi

Kouhei Maeda

A cap holder () that is attached to the inner surface side of a fuel filling door () in a state of facing an inner surface of the fuel filling door () with an interval in order to hold a cap (K) removed from a fuel tank () and a lock () that locks the fuel filling door () from the outside in a state where the fuel filling door () closes a fuel filling opening () are provided on the fuel filling door (). The lock () has a lock lever (C) that rotationally moves between a locking position where the fuel filing door () maintains a state of closing the fuel filling opening () and an unlocking position where the fuel filling door () allows opening of the fuel filling opening (). This lock lever (C) is configured by a long member a base end of which is rotatably attached to the fuel filling door () and a leading end of which is allowed to enter a gap between the fuel filling door () and the cap holder ().

Small-sized construction machine

A floor-plate side opening part (B) through which each lever part () of a traveling lever pedal () is inserted is provided on a front side of a floor plate (). A mat-side opening part (C) corresponding to the floor-plate side opening part (B) is provided on a floor mat (). A cover member () formed of a flat plate part () covering the mat-side opening part (C) and having a slit (A,B) allowing tilting of each lever part () and a cylindrical part () extending from the flat plate part () is provided on the mat-side opening part (C). An entire-circumferential lip part (D) is provided on the mat-side opening partC. An entire-circumferential stepped part () for sealing a space from the entire-circumferential lip part (D) is provided on the flat plate part (). An entire-circumferential engaging protrusion part (C) is provided on the floor-plate side opening part (B), and an entire-circumferential recessed groove () engaged with the entire-circumferential engaging protrusion part (C) is provided on the cylindrical part ().

A floor support frame () is provided with a left side pilot valve (). The left side pilot valve () is provided with a left side operating pedal () that is foot-operated. The left side operating pedal () is configured of a first foot board () that is mounted on the left pilot valve () to be rotatable in an upper-lower direction, a shaft () that is mounted in a rear portion of the first foot board (), and a second foot board () that is mounted through the shaft () on the first foot board () to be rotatable in a horizontal direction. The second foot board () is rotatable between a storage position of overlapping the first foot board () and a use position of being rotated in the rear side of the first foot board (). An operation regulating mechanism () is provided in the front side of the first foot board () to be engaged to the second foot board () when the second foot board () is rotated to the storage position to regulate a foot operation.

Small-sized hydraulic excavator

Excavator

[Problem] To provide a construction machine with a step arranged in an operator's cab, which makes it possible to enlarge the shape or dimensions of the step without increasing a swing radius. [Solution] In a compact excavator provided with a step that facilitates ingress to and egress from the operator's cab (), the step is provided at a part thereof with an outwardly-extending edge portion () that extends out beyond an opening plane () forming an ingress/egress opening (), and a door () is provided at a part thereof with a convex part () that covers the outwardly-extending edge portion () of the step when the door () is in a closed position. A floor () of the operator's cab () includes a flat part () arranged on a front side of a seat () and a stepped part () arranged in conjunction with the flat part () and on a side of the ingress/egress opening, a flange part () which lies in a same plane as the stepped part () of the floor () is arranged in conjunction with the stepped part () and in the operator's cab (), the step includes the stepped part () of the floor () and the flange part (), and the flange part () is provided with the outwardly-extending edge portion ().

Construction machinery

An upper revolving structure () includes a revolving frame (), a floor member () which is provided on the revolving frame () and a front side of which serves as a footrest section () on which an operator rests his or her feet, a cab box () which forms an operating room () above the floor member (), and an indoor unit () disposed on the floor member () to supply sucked air as conditioned air. A lower surface (B) side of the footrest section () of the floor member () is formed as a unit mounting surface (), and, as for the indoor unit (), a box body () is disposed on the lower side of the unit mounting surface () and, in this state, the box body () is mounted on the unit mounting surface () by means of a plurality of bolts ().

Construction machine

A compact excavator includes an operator's cab with a door capable of opening and closing an opening surface forming a boarding port. The door includes one door piece, and has a flexing portion which is closer to a front pillar than the central portion of the door when the door is in a closed state. The flexing portion is shaped to have a first area so formed that when the door is in a closed state, the first area approaches the opening surface as the first area approaches the front pillar, and a second area arranged continuously with the first area and nearer the front pillar than the first area and being formed so that the second area draws away from the opening surface as the second area approaches the front pillar.

On a seat base () of a floor member (), a rear surface plate (C), an operator's seat mounting plate (D) on which an operator's seat () is mounted at a position higher than a footrest area () on which the foot is placed, and a duct accommodating space () formed in the vertical direction among the rear surface plate (C), the operator's seat mounting plate (D), and a rear position (B) of the footrest area () are provided. An indoor air inlet duct () having the front surface side opened as a filter fitting hole () and introducing air in an occupying space () toward an indoor unit () of an air-conditioning unit is provided on the duct accommodating space (). An indoor air filter () for catching dusts in the air is provided on the filter fitting hole () of the indoor air inlet duct ().

A cab () is provided with a cab box () in which a space between each of pillars (to) is covered by each of surfaces (A toF) and the inside becomes an operator's room (G) and a door () mounted on the left intermediate pillar (). On a rear surface portion (D) of the left front pillar (), a protruding portion (A) of a mounting plate (A) is provided in a state protruding to the door () side. On a mounting opening (E) on the inner surface side of the door (), a door holding member () engaged with an engaging member () and holding the door () at a closed position is provided. On the door (), a retreating recessed portion () for avoiding interference with the protruding portion (A) of the mounting plate (A) is provided on the front side from the door holding member ().

A canopy () is provided to rise in an upper revolving structure () for covering an upper side of an operator's seat (). A bend portion (B) extending in the left-right direction and projecting upward is provided in a front end side of a roof plate () in the canopy (). A plate-shaped left front lifting bracket () is provided in a left front connecting portion (J), and a plate-shaped right front lifting bracket () is provided in a right front connecting portion (L). The left and right front lifting brackets () sandwich the bend portion (B) from both sides in the left-right direction. Further, the left and right front lifting brackets () are provided with lifting holes (A,A) and also discharging notches (B,B).

A floor member is formed by a seat support platform on a rear side and a footrest area located on a front side of the seat support platform, and a cab box is formed by a front panel, a rear panel, a left front side panel, a left rear side panel, a right side panel, and a top panel. A right reinforcing panel is provided at a right side position of the floor member and rises upwardly of the footrest area. The right side panel of the cab box corresponding to this right reinforcing panel is provided with a notched portion for avoiding interference with the right reinforcing panel. Accordingly, since the strength at the right side position of the floor member can be enhanced by the right reinforcing panel, it is possible to prevent deformation such as torsion and distortion when the floor member is tilted up.

Growing community of inventors

Yasu, Japan

Tomoyuki Tanaka