Abstract: A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.

Abstract: A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.

Abstract: An exhaust gas purification control device includes an engine, an actuator using the engine as a driving source, an operation unit used by an operator to operate the actuator or the engine, an operation detector detecting whether or not the operation unit is being operated, a purification device for capturing soot in exhaust gas of the engine, an accumulation amount detector detecting an accumulation amount of the soot captured by the purification device, a regeneration unit for performing an regenerating operation of regenerating the purification device by burning the soot captured by the purification device, and a controller controlling the regenerating operation. The controller switches a control from a control of prioritizing an operation by the operation unit to a control of prioritizing the regenerating operation in a stepwise manner as the accumulation amount of the soot detected by the accumulation amount detector increases.

Abstract: An exhaust gas purification control device includes an engine, an actuator using the engine as a driving source, an operation unit used by an operator to operate the actuator or the engine, an operation detector detecting whether or not the operation unit is being operated, a purification device for capturing soot in exhaust gas of the engine, an accumulation amount detector detecting an accumulation amount of the soot captured by the purification device, a regeneration unit for performing an regenerating operation of regenerating the purification device by burning the soot captured by the purification device, and a controller controlling the regenerating operation. The controller switches a control from a control of prioritizing an operation by the operation unit to a control of prioritizing the regenerating operation in a stepwise manner as the accumulation amount of the soot detected by the accumulation amount detector increases.

Abstract: A hydraulic-drive work vehicle includes a plurality of variable capacity hydraulic motors which are rotated by receiving pressure oil from a variable capacity hydraulic pump. Wheels provided at two or more axles are rotated due to torques of the hydraulic motors. The work vehicle is provided with a traveling stabilizer, the traveling stabilizer including a traveling-state detector for detecting a traveling state of the vehicle, and a controller which receives a signal from the detector and varies a capacity of at least particular one of the plurality of hydraulic motors according to the traveling state of the vehicle.

Abstract: A construction machine includes a vertical separating/connecting device interposed between a lower traveling body and a swing bearing that supports an upper rotating body. The device includes an externally toothed ring member fixed to the swing bearing with a first attaching unit, a rotating unit that rotates the externally toothed ring member, an internally toothed ring member fixed to the lower traveling body with a second attaching unit positioned on an attachment pitch circle having the same diameter and center as an attachment pitch circle of the first attaching unit, and a fixing unit that fixes the externally toothed ring member or the internally toothed ring member. Internal teeth of the internally toothed ring member and external teeth of the externally toothed ring member are positioned so as to allow the movement of the external teeth or to engage with each other when the externally toothed ring member is rotated.

Abstract: A hydraulic-drive work vehicle includes a plurality of variable capacity hydraulic motors which are rotated by receiving pressure oil from a variable capacity hydraulic pump. Wheels provided at two or more axles are rotated due to torques of the hydraulic motors. The work vehicle is provided with a traveling stabilizer, the traveling stabilizer including a traveling-state detector for detecting a traveling state of the vehicle, and a controller which receives a signal from the detector and varies a capacity of at least particular one of the plurality of hydraulic motors according to the traveling state of the vehicle.

Abstract: A construction machine includes a vertical separating/connecting device interposed between a lower traveling body and a swing bearing that supports an upper rotating body. The device includes an externally toothed ring member fixed to the swing bearing with a first attaching unit, a rotating unit that rotates the externally toothed ring member, an internally toothed ring member fixed to the lower traveling body with a second attaching unit positioned on an attachment pitch circle having the same diameter and center as an attachment pitch circle of the first attaching unit, and a fixing unit that fixes the externally toothed ring member or the internally toothed ring member. Internal teeth of the internally toothed ring member and external teeth of the externally toothed ring member are positioned so as to allow the movement of the external teeth or to engage with each other when the externally toothed ring member is rotated.

Abstract: This invention provides with a travelling working machine comprising an upper rotating body with a rotating frame and winches, a pair of right and left boom support frames formed in the rotating frame, and axial portions of the winches mounted inside rear portions of the boom support frames, characterized in that the boom support frames have openings formed by being cut out along small-diameter portions of the winches than maximum-diameter portions thereof, thereby capable of providing with the travelling working machine having the rotating frame in such a manner that the strength of the frame can be enhanced and a load bearing force can be strengthened highly without enlarging a rear swing radius of the upper rotating body.

Abstract: This invention provides with a travelling working machine comprising an upper rotating body with a rotating frame and winches, a pair of right and left boom support frames formed in the rotating frame, and axial portions of the winches mounted inside rear portions of the boom support frames, characterized in that the boom support frames have openings formed by being cut out along small-diameter portions of the winches than maximum-diameter portions thereof, thereby capable of providing with the travelling working machine having the rotating frame in such a manner that the strength of the frame can be enhanced and a load bearing force can be strengthened highly without enlarging a rear swing radius of the upper rotating body.

Abstract: The present invention provides a construction machine in which a plurality of winches are arranged to be overlapped vertically at a rear part of an upper rotating body. Therefore, a space that the winches occupy is reduced, so that the space of the upper rotating body can be utilized effectively, and a radius of rotating rear end can be reduced.

Abstract: The present invention provides a construction machine in which a plurality of winches are arranged to be overlapped vertically at a rear part of an upper rotating body. Therefore, a space that the winches occupy is reduced, so that the space of the upper rotating body can be utilized effectively, and a radius of rotating rear end can be reduced.