Abstract: This shock absorber includes a piston main body and a piston band. The piston main body has, at an outer peripheral portion thereof, a stepped portion including a large-diameter surface portion, a stepped surface portion and a small-diameter surface portion. The piston band has, at an outer peripheral portion thereof, a large diameter portion, a medium diameter portion formed so as to have a smaller diameter than the large diameter portion, and a small diameter portion formed between the large diameter portion and the medium diameter portion so as to have a smaller diameter than the medium diameter portion, in a state before being disposed in a cylinder. At one end on the side close to a tip portion of a piston rod, an inner peripheral surface is inclined toward the piston main body side from the large-diameter surface portion to a small-diameter surface portion of the stepped portion.

Abstract: An electric construction machine is provided that can travel from a work location to a charging location, and can suppress deterioration of work efficiency. The electric hydraulic excavator includes: a battery device (19); an electric motor (28) that is driven by power of the battery device (19); a hydraulic pump (29) that is driven by the electric motor (28); a travelling hydraulic motor (7) and a work hydraulic actuator that are driven by a hydraulic fluid delivered from the hydraulic pump (29); a controller (37); and a display device (24).

Abstract: A battery-operated work machine is provided which can perform a work while avoiding such a situation that the work machine cannot reach charging equipment. When the remaining capacity of a battery becomes lower than a first threshold value set in advance, a controller controls an inverter such that the revolution speed of an electric motor is kept at a target revolution speed and controls a first notification device to operate, and besides switches a traveling motor to a travel first speed side, in which the displacement volume is a large volume, irrespective of an input from a traveling mode instruction device, when the remaining capacity of the battery becomes lower than a first threshold value set in advance.

Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.

Abstract: An electric construction machine is provided that can travel from a work location to a charging location, and can suppress deterioration of work efficiency. The electric hydraulic excavator includes: a battery device (19); an electric motor (28) that is driven by power of the battery device (19); a hydraulic pump (29) that is driven by the electric motor (28); a travelling hydraulic motor (7) and a work hydraulic actuator that are driven by a hydraulic fluid delivered from the hydraulic pump (29); a controller (37); and a display device (24).

Abstract: An electric construction machine that can travel from a work site to charging equipment and prevent the lowering of the work efficiency is provided. An electric hydraulic excavator includes a motor (28) that is driven by power of a battery device (19) and drives a hydraulic pump (29), a controller (37), and a display device (24). The controller (37) computes and stores the amount of consumed power of the motor (28) consumed during the period from the departure of the hydraulic excavator from the charging equipment to arrival at the work site, based on movement information of the hydraulic excavator acquired by a movement information acquiring device. The controller (37) subtracts the amount of consumed power from the amount of stored power of the battery device (19) to compute the amount of power consumable at the work site.

Abstract: Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.

Abstract: Provided is a grip heater apparatus for a construction machine that can improve operability by heating the grip portions of left and right operating levers and maintaining a favorable operating environment for the left and right operating levers when work is carried out in a cold region and the operator's hands get cold. The grip heater apparatus includes: left and right grip heaters 31 and 32 provided in grip portions of left and right operation levers 26 and 28, respectively; a battery supplying electric power to the left and right grip heaters; a heater switch 34 for instructing the left and right grip heaters to be turned on or off; and a control device supplying the electric power from the battery to the left and right grip heaters only when the engine is running, the gate lock lever 27 is at a getting-on/off prevention position, and the heater switch instructs the left and right grip heaters to be turned on.

Abstract: A hydraulic excavator (1) includes a wireless authentication starting device (37) for switching conduction or non-conduction between a battery (18) and a starter motor (16) as well as a first electrical component (24) on the basis of an operation of a power switch (12) provided in the vicinity of an operator's seat (9) and authentication of a portable key (38) by wireless communication. The wireless authentication starting device (37) switches an “engine stop/conduction OFF” state to an “engine stop/conduction ON” state when, in the “engine stop/conduction OFF” state, the portable key (38) is within an authenticable range, the gate lock lever (13) is at an unlock position, and the power switch (12) is operated.

Abstract: An electrically-operated construction machine with a battery charging operation. A lock switch provides a closed contact when a lock lever in a cab is placed in an unlock position. A feed port is disposed outside the cab to accept a cable from a commercial power source. The feed port is provided with a charge start switch. A control device has a motor control function for driving an electric motor with electrical power of a main battery when a signal is input from the lock switch. A charge control function is for charging the main battery with electrical power of the commercial power source when dictated by the charge start switch. The lock switch is wire-connected so as not to output the signal to the control device even if the closed contact is provided by the lock switch when the control device exercises charge control.

Abstract: An electrically-operated construction machine with a battery charging operation. A lock switch provides a closed contact when a lock lever in a cab is placed in an unlock position. A feed port is disposed outside the cab to accept a cable from a commercial power source. The feed port is provided with a charge start switch . A control device has a motor control function for driving an electric motor with electrical power of a main battery when a signal is input from the lock switch. A charge control function is for charging the main battery with electrical power of the commercial power source when dictated by the charge start switch. The lock switch is wire-connected so as not to output the signal to the control device even if the closed contact is provided by the lock switch when the control device exercises charge control.

Abstract: The data transcription processing unit is prepared. This unit is beforehand provided with the document-structure definition information on the structured documents, i.e., the processing target, the structure definition information on the program language, and the correspondence information between the document-structure definition and the structure definition. Then, a reading/writing request is issued from the application program to the data transcription processing unit. The issue of the request accomplishes the data transcription on each element basis between the structured documents and the structure of the program language.

Abstract: The data transcription processing unit is prepared. This unit is beforehand provided with the document-structure definition information on the structured documents, i.e., the processing target, the structure definition information on the program language, and the correspondence information between the document-structure definition and the structure definition. Then, a reading/writing request is issued from the application program to the data transcription processing unit. The issue of the request accomplishes the data transcription on each element basis between the structured documents and the structure of the program language.

Abstract: The data transcription processing unit is prepared. This unit is beforehand provided with the document-structure definition information on the structured documents, i.e., the processing target, the structure definition information on the program language, and the correspondence information between the document-structure definition and the structure definition. Then, a reading/writing request is issued from the application program to the data transcription processing unit. The issue of the request accomplishes the data transcription on each element basis between the structured documents and the structure of the program language.

Abstract: The data transcription processing unit is prepared. This unit is beforehand provided with the document-structure definition information on the structured documents, i.e., the processing target, the structure definition information on the program language, and the correspondence information between the document-structure definition and the structure definition. Then, a reading/writing request is issued from the application program to the data transcription processing unit. The issue of the request accomplishes the data transcription on each element basis between the structured documents and the structure of the program language.