# US 12,110,662 B2 · Work machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,662 B2 - Document ID: US12110662B2 - Status: Granted - Kind: B2 - Application number: 17/909,506 - Filed: 2021-05-26 - Published: 2023-04-13 - Granted: 2024-10-08 - Earliest claimed: 2020-05-29 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Kazushige Kurokami; Takaaki Ishii; Shigeki Tokita; Hiroshi Sakamoto; Yoshiyuki Tsuchie - Web page: https://patentgrep.com/patent/US12110662B2 ## CPC - E02F 9/24: Safety devices {, e.g. for preventing overload (E02F9/226 takes precedence)} - E02F 9/2033: {Limiting the movement of frames or implements, e.g. to avoid collision between implements and the cabin (sub-groups of E02F3/431 of E02F3/435 take precedence; for turntables E02F9/123)} - E02F 9/262: {with follow-up actions to control the work tool, e.g. controller} - E02F 9/267: {Diagnosing or detecting failure of vehicles} - E02F 3/32: working downwardly and towards the machine, e.g. with backhoes - E02F 3/435: {for dipper-arms, backhoes or the like} - E02F 9/2228: {including an electronic controller} - E02F 9/2285: {Pilot-operated systems} - E02F 9/2292: {Systems with two or more pumps} - E02F 9/2296: {Systems with a variable displacement pump} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A work machine includes: an informing device that informs an operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller; and a communication device that communicates with a mobile terminal carried by the worker. The controller determines whether or not an approval request for requesting approval of entry into a movable range of the work machine transmitted from the mobile terminal when the worker around the work machine operates the mobile terminal has been received; inform, by using the informing device, that the approval request has been received when it is determined that the approval request has been received; determine whether or not approval operation of approving entry into the movable range has been performed on the input device; set an interpersonal communication level representing a degree of interpersonal communication between the operator and the worker depending on whether or not the approval request has been received and whether or not the approval operation has been performed; decide a mode of notification in accordance with the interpersonal communication level; and give a notification in the mode of notification by using the notification device. ## Claims ### Claim 1 A work machine comprising: a machine body; a work implement attached to the machine body; an operation device that is provided in an operation room, and gives an instruction about operation of the work implement according to operation by an operator; an informing device that informs the operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller that controls the informing device and the notification device; and a communication device that communicates with a mobile terminal carried by the worker, wherein the controller is configured to determine whether or not the communication device has received an approval request for requesting approval of entry into a movable range of the work machine, the approval request being transmitted from the mobile terminal when the worker operates the mobile terminal, inform, by using the informing device, that the approval request has been received, when it is determined that the approval request has been received, determine whether or not approval operation of approving entry into the movable range of the work machine has been performed on the input device, set an interpersonal communication level representing a degree of interpersonal communication between the operator and the worker, depending on whether or not the approval request has been received and whether or not the approval operation has been performed, decide a mode of notification by the notification device in accordance with the interpersonal communication level, and give a notification in the decided mode of notification by using the notification device. ### Claim 2 (depends on 1) The work machine according to claim 1, wherein the work machine includes a worker position sensor that senses a position of the worker around the work machine, and the controller is configured to change the mode of notification when the worker position sensor has sensed that a worker for whom the interpersonal communication level equal to or lower than a reference level is set has moved from an outside of the movable range of the work machine to an inside of the movable range. ### Claim 3 (depends on 1) The work machine according to claim 1, wherein the work machine includes a worker position sensor that senses a position of the worker around the work machine, and a work range setting device that sets a work range of the work machine, and the controller is configured to change the mode of notification when the worker position sensor has sensed that a worker for whom the interpersonal communication level equal to or higher than a reference level is set has moved from an outside of the work range to an inside of the work range. ### Claim 4 (depends on 1) The work machine according to claim 1, wherein the work machine includes a work range setting device that sets a work range of the work machine, and the controller is configured to determine whether or not the work range of the work machine has been set, and decide the mode of notification on a basis of a result of the determination. ### Claim 5 (depends on 2) The work machine according to claim 2, wherein the controller is configured to restrict operation of the work implement when the worker position sensor has sensed presence, in the movable range, of a worker for whom the interpersonal communication level equal to or lower than the reference level is set. ### Claim 6 (depends on 5) The work machine according to claim 5, wherein the work machine includes a work range setting device that sets a work range of the work machine, and the controller is configured to restrict operation of the work implement irrespective of the interpersonal communication level when the worker position sensor has sensed the worker in the work range.