Abstract: An estimative load determination part included in a work machine determines, based on a load acquired by a load acquisition section, an estimative load of an object of a work held by an attachment when an estimative load determinative criterion is satisfied. The estimative load determinative criterion includes at least one of a criterion that a predetermined first reduction manipulation is detected in a holding task and a criterion that the first reduction manipulation is detected after the holding task, the first reduction manipulation being for reducing an amount of the object held by the attachment.

Abstract: A property calculation section of the controller calculates a horizontal distance between a boom proximal end portion and an arm distal end portion based on a detection signal input from an attitude detector, calculates a weight of the distal end attachment based on the horizontal distance and a detection signal input from a holding pressure detector in a state where a distal end attachment is disposed at a pressure release position, and calculates a gravity center position of the distal end attachment based on the weight of the distal end attachment, a detection signal input from the holding pressure detector, and a detection signal input from the attitude detector in a state where the distal end attachment is disposed at a displacement position that is a position different from the pressure release position.

Abstract: A work machine is capable of inhibiting an unintended machine motion and reducing energy consumption. The work machine includes a controller, a drive source, a controller switch to which an on-operation and an off-operation are applied, a lock operation member to which a lock operation and a lock release operation for invalidating and validating a lever operation, respectively, are applied, and a drive source switch to which a start operation and a stop operation for starting and stopping the drive source, respectively, are applied. After activated by the on-operation applied to the controller switch, the controller starts the drive source when judging that the lock-release operation is applied to the lock operation member and the start operation is applied to the drive source switch, whereas suspends starting the drive source when judging that both the lock-release operation and the start operation has not been applied.

Abstract: A work machine includes: a load acquisition section which acquires a load of an object held by an attachment; and an estimative load determination part which determines, based on the load acquired by the load acquisition section, an estimative load of the object estimated to be discharged at a position above a destination in a discharge task when a predetermined estimative load determinative criterion is satisfied. The estimative load determinative criterion includes at least one of a criterion that a boom rising speed at which a boom rises in a rising direction reduces in a holding task, and a criterion that the boom rising speed reduces in a carrying task.

Abstract: A work machine includes: a reference posture setting part which sets a reference posture which is one of postures of a working device in a holding task; an estimative load determination part which determines, based on a load acquired by a load acquisition section, an estimative load of an object of a work estimated to be discharged at a position above a loading destination in a discharge task when a predetermined estimative load determinative criterion is satisfied; an output part which outputs an estimative result which is information about the estimative load determined by the estimative load determination part. The estimative load determinative criterion includes a criterion that a posture change amount representing a changed degree of the posture of the working device from the reference posture is equal to or larger than a predetermined change amount threshold for determination of the estimative load.

Abstract: In a work machine, a load information output part outputs a load calculated by a load calculation part as load information before a piston member shifting toward a stroke end reaches a specific position, and a load storage part stores the load calculated by the load calculation part as a specific load when the piston member shifting toward the stroke end reaches the specific position. The load information output part further outputs the specific load as the load information after the piston member shifting toward the stroke end enters a specific region.

Abstract: A work machine includes: a load acquisition section which acquires a load of an object held by an attachment; and an estimative load determination part which determines, based on the load acquired by the load acquisition section, an estimative load of the object estimated to be discharged at a position above a destination in a discharge task when a predetermined estimative load determinative criterion is satisfied. The estimative load determinative criterion includes at least one of a criterion that a boom rising speed at which a boom rises in a rising direction reduces in a holding task, and a criterion that the boom rising speed reduces in a carrying task.

Abstract: A wiper operation system for a construction machine, enabling a plurality of wiper operating modes set for the operation of the wiper device to be easily checked and being capable of preventing erroneous selection of the wiper operating mode, includes a display, an operation reception unit that receives a mode selection operation for selecting one wiper motion mode from among a plurality of wiper motion modes, and a wiper control section that makes the wiper device perform a motion in the selected wiper motion mode. The display includes a wiper motion display unit performing a display of a plurality of icons corresponding to a plurality of wiper action modes respectively, and an identification display enabling the icon of the selected wiper action mode to be identified.

Abstract: A working machine detects a bucket angle that is an angle of an opening face of a bucket with respect to a vertical direction orthogonal to a horizontal plane on the basis of detection data indicating a posture of a working device detected by a posture sensor, determines whether an object is accommodated in the bucket or not on the basis of a detected load value of the object accommodated in the bucket, and determines that the object accommodated in the bucket is discharged when the detected bucket angle is on a discharge side beyond a discharge reference angle, and the load value detected by a load detection part is smaller than a load threshold, after the determination that an object is accommodated in the bucket.

Abstract: In a work machine, a load information output part outputs a load calculated by a load calculation part as load information before a piston member shifting toward a stroke end reaches a specific position, and a load storage part stores the load calculated by the load calculation part as a specific load when the piston member shifting toward the stroke end reaches the specific position. The load information output part further outputs the specific load as the load information after the piston member shifting toward the stroke end enters a specific region.

Abstract: A property calculation section of the controller calculates a horizontal distance between a boom proximal end portion and an arm distal end portion based on a detection signal input from an attitude detector, calculates a weight of the distal end attachment based on the horizontal distance and a detection signal input from a holding pressure detector in a state where a distal end attachment is disposed at a pressure release position, and calculates a gravity center position of the distal end attachment based on the weight of the distal end attachment, a detection signal input from the holding pressure detector, and a detection signal input from the attitude detector in a state where the distal end attachment is disposed at a displacement position that is a position different from the pressure release position.

Abstract: An estimative load determination part included in a work machine determines, based on a load acquired by a load acquisition section, an estimative load of an object of a work held by an attachment when an estimative load determinative criterion is satisfied. The estimative load determinative criterion includes at least one of a criterion that a predetermined first reduction manipulation is detected in a holding task and a criterion that the first reduction manipulation is detected after the holding task, the first reduction manipulation being for reducing an amount of the object held by the attachment.

Abstract: A wiper operation system for a construction machine, enabling a plurality of wiper operating modes set for the operation of the wiper device to be easily checked and being capable of preventing erroneous selection of the wiper operating mode, includes a display, an operation reception unit that receives a mode selection operation for selecting one wiper motion mode from among a plurality of wiper motion modes, and a wiper control section that makes the wiper device perform a motion in the selected wiper motion mode. The display includes a wiper motion display unit performing a display of a plurality of icons corresponding to a plurality of wiper action modes respectively, and an identification display enabling the icon of the selected wiper action mode to be identified.

Abstract: Provided is a construction machine including an exhaust-gas after-treatment device and capable of supporting the exhaust-gas after-treatment device in a limited space. The construction machine includes an upper frame, an engine mounted on the upper frame via a plurality of engine mounts, a hydraulic pump coupled to the engine, the exhaust-gas after-treatment device, and a support cradle supporting the exhaust-gas after-treatment device over the hydraulic pump. The upper frame includes a plurality of mount support portions and a leg support portion. The support cradle includes a support stage on which the exhaust-gas after-treatment device is mounted, and a plurality of legs. The plurality of mount support portions include a space-defining mount support portion defining a horizontal space against the hydraulic pump. The plurality of legs include an in-space leg extending in the space. The leg support portion is located to overlap the space in a plan view.

Abstract: Provided is a construction machine including an exhaust-gas after-treatment device and capable of supporting the exhaust-gas after-treatment device in a limited space. The construction machine includes an upper frame, an engine mounted on the upper frame via a plurality of engine mounts, a hydraulic pump coupled to the engine, the exhaust-gas after-treatment device, and a support cradle supporting the exhaust-gas after-treatment device over the hydraulic pump. The upper frame includes a plurality of mount support portions and a leg support portion. The support cradle includes a support stage on which the exhaust-gas after-treatment device is mounted, and a plurality of legs. The plurality of mount support portions include a space-defining mount support portion defining a horizontal space against the hydraulic pump. The plurality of legs include an in-space leg extending in the space. The leg support portion is located to overlap the space in a plan view.