Yanmar Holdings

Occurrence of an accident during access to an accessed portion is prevented. A control method for a work machine 100 that uses an electric motor 2 to be supplied with electric power from a battery unit 1 as a drive source includes: allowing access to a predetermined accessed portion 101 by releasing a lock mechanism 5; and rendering the electric motor 2 in a non-drivable state while the lock mechanism 5 is in a released state.

Provided is a technology capable of suppressing flow disturbance caused at the time of joining of an exhaust gas, improving thermal efficiency of an engine, and enhancing cleanliness of an exhaust gas. An exhaust manifold is an exhaust manifold of an engine including a plurality of cylinders, and includes: a plurality of exhaust pipes through each of which an exhaust gas discharged from each of the cylinders flows; and a joining pipe coupled to the plurality of exhaust pipes, to which the exhaust gas flowing through each of the exhaust pipes is joined. The joining pipe includes a plurality of guide portions provided to respectively correspond to the plurality of exhaust pipes. Each of the guide portions guides the exhaust gas flowing in from the corresponding exhaust pipe in a flow direction of the exhaust gas flowing through the joining pipe. Each of the guide portions has an opposing surface provided to be opposed to an outlet of the corresponding exhaust pipe. At least one of the guide portions has a part that is disposed on a downstream side in the flow direction with respect to the outlet.

[Problem] To provide a control method of a working machine, a working machine control program, a working machine control system, and a working machine that facilitate improvement in working efficiency. [Solution] A control method of a working machine is a control method of a working machine including a prime mover for driving a hydraulic pump that discharges hydraulic oil, a working unit, and a pair of lock levers 463L and 463R. The working unit is driven by a hydraulic actuator that receives the hydraulic oil. Each of the pair of lock levers 463L and 463R can be switched between a first posture and a second posture. The control method includes making an operation of the prime mover different between a first state in which only one of the pair of lock levers 463L and 463R is in the first posture and a second state in which both of the pair of lock levers 463L and 463R are in the first posture.

[Problem] A position of a horizon can be detected based on an identification result of a light of an other ship even in the nighttime by using an image acquired by a visible light camera. [Solution] A navigation support device that supports navigation of a ship includes a light detector. The light detector detects a light based on color information included in an image acquired by the visible light camera.

[Problem] To provide a harvesting machine in which a blind spot is less likely to occur.[Solution] A harvesting machine 4 includes a machine body 40, a horizontal conveyance path 492, and an antenna device 1. The machine body 40 includes a driving part 47. The horizontal conveyance path 492 has a length along a horizontal plane, is rotatable about a support portion 495 located on a rear side relative to the driving part 47, in plan view, and discharges a harvesting target from an end portion on a side opposite to the support portion 495. The antenna device 1 is supported by the machine body 40. The antenna device 1 is disposed at a position between the driving part 47 and the support portion 495, in plan view.

[Problem] To suppress an increase in length of a pipe connecting a control valve and a hydraulic pump without interfering with a battery unit.[Solution] A working machine 100 includes an electric motor 2, a battery unit 3, a control valve 4, and a pipe 5. The electric motor 2 drives a hydraulic pump 1. The battery unit 3 supplies electric power to the electric motor 2. The control valve 4 controls flow of hydraulic oil pressure-fed from the hydraulic pump 1. The pipe 5 connects the hydraulic pump 1 and the control valve 4. The pipe 5 extends from one of the hydraulic pump 1 and the control valve 4 to the other via the lower side of the battery unit 3.

[Problem] To provide an electric working machine capable of preventing loosening of connection between a battery unit and a cable with a compact configuration.[Solution] A hydraulic excavator as an electric working machine includes an electric motor, a battery unit that stores electric power for driving the electric motor, a cable connected to the battery unit, and a restricting portion disposed to face the battery unit. The restricting portion restricts movement of the cable.

[Problem] A technique capable of improving the operability of an expansion-type operation device is provided. [Solution] An exemplary operation device includes: a lever stand that is disposed on a side of a seat and has an operation lever; a lever stand support portion that supports the lever stand so that the lever stand is pivotable up and down; a base portion that is disposed below the lever stand support portion and supports the lever stand support portion so that the lever stand support portion is pivotable left and right; and a holding plate that is supported by the base portion and disposed above a bottom portion of the lever stand support portion. When the lever stand is pivoted from the first posture to the second posture, the lever stand support portion is made pivotable in a left-right direction to select a third posture or a fourth posture. The holding plate holds, in the third posture or the fourth posture, the lever stand support portion supporting the lever stand in the first posture.

[Problem] To provide a work machine in which connection work to a controller can be facilitated while the controller can be efficiently arranged.[Solution] A hydraulic excavator as a work machine is a work machine including: a base plate that is located in a bottom portion of a machine body; a pair of vertical plates that are disposed to extend in a front-back direction of the machine body, on the base plate; and a controller that is arranged between the pair of vertical plates.

[Problem] To provide a control method of a work machine, a work machine control program, a work machine control system, and a work machine, that can easily perform an action intended by an operator. [Solution] A control method of a work machine includes executing the deceleration control when the deceleration condition is satisfied and changing the rated rotational speed in accordance with an operation of the accelerator operation portion 37. In the deceleration control, the target rotational speed of the prime mover 40 for driving the hydraulic pump 41 that discharges hydraulic oil is switched from the rated rotational speed to a first specific rotational speed lower than the rated rotational speed. Here, in the control method, when there is an operation on the accelerator operation portion 37 while the deceleration control is being executed, the deceleration control is continued.