Patents by Inventor Kunitsugu Tomita
Kunitsugu Tomita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11475388Abstract: A server device for generating and outputting work management information of at least one carrier. The server device comprises a storage device for storing a program for generating work management information, and a controller for reading the program from the storage device and generating work management information by executing the program. The controller performs: a process of acquiring position information about at least one carrier; a process of generating, based on the position information, work type information indicating whether the carrier is performing a predetermined work or moving; a process of calculating a required time for each work type information item of the carrier; a process of comparing the required time for each work type information item and extracting a work element with low work efficiency based on a first rule concerning required time; and a process of outputting the extracted work element with low work efficiency.Type: GrantFiled: January 22, 2020Date of Patent: October 18, 2022Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Isao Karube, Hidehiro Iizuka, Masami Kamibayashi, Ryota Niizeki, Kunitsugu Tomita, Hiroshi Watanabe, Hiroyuki Adachi
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Patent number: 11454005Abstract: A controller (21) of a hydraulic excavator (1) performs a first determination of determining whether or not loading of an object to be worked onto a dump truck (2) by the hydraulic excavator has been conducted based on a posture of a work implement (12), calculates a first load that is a load of the object to be worked loaded onto the dump truck by the hydraulic excavator based on a thrust force of a boom cylinder (16) and on a determination result of the first determination, performs a third determination of determining whether or not the first load is to be integrated based on a determination result of a second determination of determining whether or not the loading of the object to be worked onto the dump truck by the hydraulic excavator has been conducted that is transmitted from a controller (40) of the dump truck and on the determination result of the first determination, and calculates a loaded weight on the dump truck by integrating the first load in a case where it is determined by the third determinType: GrantFiled: September 21, 2018Date of Patent: September 27, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Satoshi Nakamura, Kunitsugu Tomita, Kazunori Hoshino, Shigeru Bandou
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Patent number: 11427984Abstract: An excavation load calculated by an excavation load calculating section and an excavation distance calculated by an excavation distance calculating section are stored in a work result storage section in association with each other. A correspondence relation setting section sets correspondence relation between a target excavation load and a target excavation distance on the basis of a tendency of correspondence relation between the excavation load and the excavation distance stored in the work result storage section. The target excavation load is set on the basis of rated capacity information of a bucket. A target excavation distance calculating section calculates the target excavation distance on the basis of the correspondence relation set by the correspondence relation setting section and the target excavation load. The target excavation distance is displayed on a monitor.Type: GrantFiled: March 27, 2019Date of Patent: August 30, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Joonyoung Roh, Kunitsugu Tomita, Satoshi Nakamura
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Patent number: 11306460Abstract: A controller 21 mounted on a work machine calculates a target carried load representing a target value for a carried load carried by the work machine on the basis of loadage of a transportation machine in case the loadage is changed, calculates a minimum integration load value depending on the magnitude of the calculated target carried load, and calculates the loadage by integrating the carried load in case it is determined that a work implement has performed a loading operation on the transportation machine and in case the calculated carried load is equal to or larger than the minimum integration load value.Type: GrantFiled: March 15, 2019Date of Patent: April 19, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Satoshi Nakamura, Kunitsugu Tomita, Youhei Toriyama, Joonyoung Roh
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Patent number: 11299869Abstract: A loading amount accumulation device includes a loading amount storage section 403 storing a loading amount, a loading amount calculation section 402 accumulating load weight data about a transport object in a working front to the loading amount, and updating the loading amount by the value after being accumulated, a difference calculation section 404 calculating a difference between a loaded amount of a vessel and the loading amount, an accumulation success/failure determination section 405 comparing an absolute value of the difference and a value Dth, determining that accumulation has failed when the absolute value is larger than the value Dth, and outputting a result, a loading amount correction section 406, when the failure is output as the result, performing correction so as to set the loaded amount data as the loading amount, and updating the loading amount by the corrected loading amount, and an output section outputting the loading amount.Type: GrantFiled: October 27, 2017Date of Patent: April 12, 2022Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventor: Kunitsugu Tomita
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Patent number: 11236488Abstract: A controller includes a storage device that stores a load overflow reference value defined by a mutual relation between a load value of a work target object, a posture of a work implement, and a movement state of the work implement. The controller calculates the posture of the work implement, and calculates a physical quantity (for example, a swing speed) indicating the movement state of the work implement. The controller estimates whether or not the work implement has caused a load overflow during the transportation of the work target object on the basis of the reference value stored in the storage device, the calculated load value of the work target object, the calculated posture of the work implement, and the calculated physical quantity indicating the movement state of the work implement. When the controller determines that the load overflow has occurred, the controller makes a notification to that effect on a monitor.Type: GrantFiled: March 6, 2019Date of Patent: February 1, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Satoshi Nakamura, Kunitsugu Tomita
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Publication number: 20220027829Abstract: A server device for generating and outputting work management information of at least one carrier. The server device comprises a storage device for storing a program for generating work management information, and a controller for reading the program from the storage device and generating work management information by executing the program. The controller performs: a process of acquiring position information about at least one carrier; a process of generating, based on the position information, work type information indicating whether the carrier is performing a predetermined work or moving; a process of calculating a required time for each work type information item of the carrier; a process of comparing the required time for each work type information item and extracting a work element with low work efficiency based on a first rule concerning required time; and a process of outputting the extracted work element with low work efficiency.Type: ApplicationFiled: January 22, 2020Publication date: January 27, 2022Inventors: Isao KARUBE, Hidehiro IIZUKA, Masami KAMIBAYASHI, Ryota NIIZEKI, Kunitsugu TOMITA, Hiroshi WATANABE, Hiroyuki ADACHI
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Patent number: 11169018Abstract: A controller (18) calculates, based on a target loading weight (P) that is a target value of a total weight of working objects to be loaded into a hauling vehicle, a set loading time number indicative of a loading time number required for the construction machine before the target loading weight (P) is reached and bucket shape information indicative of a shape of a bucket (7), an appropriate loading weight (Wa) that is an appropriate value of the weight of the working objects to be loaded into the hauling vehicle by a single time loading work by the construction machine, creates an appropriate amount illustration (30) that is an illustration of a state at which the working objects of the appropriate loading weight (Wa) are loaded into the bucket and that illustrates the state of the working objects, based on the appropriate loading weight (Wa) and the bucket shape information, and controls a display device (19) to display an illustration (29) of the bucket (7) and the appropriate amount illustration (30) in aType: GrantFiled: August 24, 2018Date of Patent: November 9, 2021Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Kazunori Hoshino, Kunitsugu Tomita, Satoshi Nakamura, Yousuke Yamanobe, Youhei Toriyama
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Patent number: 11085168Abstract: A hydraulic excavator (1) including a controller (21) having a load computing section (52) configured to compute a load of a work target material on the basis of thrust information about a boom cylinder (16) during the period when a front work implement (12) is performing a transporting operation of a work target material, the controller (21) further including: a velocity limiting value computing section (55) configured to compute a limiting value (Vlim) of a velocity of a boom cylinder (16) on the basis of posture information about the work implement (12) at a time of starting the transporting operation; a velocity command correction section (50) configured to correct a velocity command in such a manner that the velocity of the boom cylinder is equal to the limiting value (Vlim) when the velocity of the boom cylinder exceeds the limiting value and output the corrected velocity command; and a drive signal generation section (51) configured to generate and output a drive signal for the boom cylinder on the basType: GrantFiled: April 27, 2018Date of Patent: August 10, 2021Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Satoshi Nakamura, Kunitsugu Tomita, Kazunori Hoshino, Yousuke Yamanobe, Youhei Toriyama
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Patent number: 11008732Abstract: A work assist system for a self-propelled hydraulic excavator includes a controller (18) configured to determine a region in which an assumed excavation amount is obtained from an object to be excavated by one excavation operation of the hydraulic excavator (1) as a region to be excavated S on the basis of the assumed excavation amount in the one excavation operation of the hydraulic excavator (1), and to calculate a work position Pw of the hydraulic excavator (1) at which the hydraulic excavator (1) performs a next excavation operation on the basis of the region to be excavated S. A distance Lw from the hydraulic excavator to the work position Pw is calculated by the controller (18) and this distance Lw is displayed on the monitor (21).Type: GrantFiled: June 27, 2016Date of Patent: May 18, 2021Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Satoshi Nakamura, Akinori Ishii, Kunitsugu Tomita, Takahiro Inada, Saku Egawa
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Patent number: 10794754Abstract: A loadage correction system includes a loading-weight measuring unit that measures a loading weight of a work object loaded by a loader, a loadage measuring unit that measures loadage of the work object loaded on a transporter from the loader, a communication unit that performs data transfer of measurement results obtained in the loading-weight measuring unit and the loadage measuring unit, a difference calculating unit that calculates a difference between the measurement results of the loading-weight measuring unit and the loadage measuring unit input from the loading-weight measuring unit and the loadage measuring unit, a difference storing unit that stores a difference calculation result, a correction-target determining unit that determines the loading-weight measuring unit or the loadage measuring unit, the measurement result of which needs to be corrected, from the loading-weight measuring unit and the loadage measuring unit, and a correction-value calculating unit that calculates a correction value forType: GrantFiled: June 20, 2018Date of Patent: October 6, 2020Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Kunitsugu Tomita, Akinori Ishii
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Publication number: 20200283992Abstract: A controller 21 mounted on a work machine calculates a target carried load representing a target value for a carried load carried by the work machine on the basis of loadage of a transportation machine in case the loadage is changed, calculates a minimum integration load value depending on the magnitude of the calculated target carried load, and calculates the loadage by integrating the carried load in case it is determined that a work implement has performed a loading operation on the transportation machine and in case the calculated carried load is equal to or larger than the minimum integration load value.Type: ApplicationFiled: March 15, 2019Publication date: September 10, 2020Inventors: Satoshi NAKAMURA, Kunitsugu TOMITA, Youhei TORIYAMA, Joonyoung ROH
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Publication number: 20200277753Abstract: An excavation load calculated by an excavation load calculating section and an excavation distance calculated by an excavation distance calculating section are stored in a work result storage section in association with each other. A correspondence relation setting section sets correspondence relation between a target excavation load and a target excavation distance on the basis of a tendency of correspondence relation between the excavation load and the excavation distance stored in the work result storage section. The target excavation load is set on the basis of rated capacity information of a bucket. A target excavation distance calculating section calculates the target excavation distance on the basis of the correspondence relation set by the correspondence relation setting section and the target excavation load. The target excavation distance is displayed on a monitor.Type: ApplicationFiled: March 27, 2019Publication date: September 3, 2020Inventors: Joonyoung ROH, Kunitsugu TOMITA, Satoshi NAKAMURA
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Patent number: 10711436Abstract: A work machine operation assistance device enables setting of a manipulation gain appropriate for a skill level and habits of an operator and/or actual work contents.Type: GrantFiled: November 9, 2016Date of Patent: July 14, 2020Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventor: Kunitsugu Tomita
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Publication number: 20200208373Abstract: A controller includes a storage device that stores a load overflow reference value defined by a mutual relation between a load value of a work target object, a posture of a work implement, and a movement state of the work implement. The controller calculates the posture of the work implement, and calculates a physical quantity (for example, a swing speed) indicating the movement state of the work implement. The controller estimates whether or not the work implement has caused a load overflow during the transportation of the work target object on the basis of the reference value stored in the storage device, the calculated load value of the work target object, the calculated posture of the work implement, and the calculated physical quantity indicating the movement state of the work implement. When the controller determines that the load overflow has occurred, the controller makes a notification to that effect on a monitor.Type: ApplicationFiled: March 6, 2019Publication date: July 2, 2020Inventors: Satoshi NAKAMURA, Kunitsugu TOMITA
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Publication number: 20200115888Abstract: A controller (21) of a hydraulic excavator (1) performs a first determination of determining whether or not loading of an object to be worked onto a dump truck (2) by the hydraulic excavator has been conducted based on a posture of a work implement (12), calculates a first load that is a load of the object to be worked loaded onto the dump truck by the hydraulic excavator based on a thrust force of a boom cylinder (16) and on a determination result of the first determination, performs a third determination of determining whether or not the first load is to be integrated based on a determination result of a second determination of determining whether or not the loading of the object to be worked onto the dump truck by the hydraulic excavator has been conducted that is transmitted from a controller (40) of the dump truck and on the determination result of the first determination, and calculates a loaded weight on the dump truck by integrating the first load in a case where it is determined by the third determinType: ApplicationFiled: September 21, 2018Publication date: April 16, 2020Inventors: Satoshi NAKAMURA, Kunitsugu TOMITA, Kazunori HOSHINO, Shigeru BANDOU
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Publication number: 20200041331Abstract: A controller (18) calculates, based on a target loading weight (P) that is a target value of a total weight of working objects to be loaded into a hauling vehicle, a set loading time number indicative of a loading time number required for the construction machine before the target loading weight (P) is reached and bucket shape information indicative of a shape of a bucket (7), an appropriate loading weight (Wa) that is an appropriate value of the weight of the working objects to be loaded into the hauling vehicle by a single time loading work by the construction machine, creates an appropriate amount illustration (30) that is an illustration of a state at which the working objects of the appropriate loading weight (Wa) are loaded into the bucket and that illustrates the state of the working objects, based on the appropriate loading weight (Wa) and the bucket shape information, and controls a display device (19) to display an illustration (29) of the bucket (7) and the appropriate amount illustration (30) in aType: ApplicationFiled: August 24, 2018Publication date: February 6, 2020Inventors: Kazunori HOSHINO, Kunitsugu TOMITA, Satoshi NAKAMURA, Yousuke YAMANOBE, Youhei TORIYAMA
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Publication number: 20200033183Abstract: A loadage correction system includes a loading-weight measuring unit that measures a loading weight of a work object loaded by a loader, a loadage measuring unit that measures loadage of the work object loaded on a transporter from the loader, a communication unit that performs data transfer of measurement results obtained in the loading-weight measuring unit and the loadage measuring unit, a difference calculating unit that calculates a difference between the measurement results of the loading-weight measuring unit and the loadage measuring unit input from the loading-weight measuring unit and the loadage measuring unit, a difference storing unit that stores a difference calculation result, a correction-target determining unit that determines the loading-weight measuring unit or the loadage measuring unit, the measurement result of which needs to be corrected, from the loading-weight measuring unit and the loadage measuring unit, and a correction-value calculating unit that calculates a correction value forType: ApplicationFiled: June 20, 2018Publication date: January 30, 2020Inventors: Kunitsugu TOMITA, Akinori ISHII
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Publication number: 20200018037Abstract: A hydraulic excavator (1) including a controller (21) having a load computing section (52) configured to compute a load of a work target material on the basis of thrust information about a boom cylinder (16) during the period when a front work implement (12) is performing a transporting operation of a work target material, the controller (21) further including: a velocity limiting value computing section (55) configured to compute a limiting value (Vlim) of a velocity of a boom cylinder (16) on the basis of posture information about the work implement (12) at a time of starting the transporting operation; a velocity command correction section (50) configured to correct a velocity command in such a manner that the velocity of the boom cylinder is equal to the limiting value (Vlim) when the velocity of the boom cylinder exceeds the limiting value and output the corrected velocity command; and a drive signal generation section (51) configured to generate and output a drive signal for the boom cylinder on the basType: ApplicationFiled: April 27, 2018Publication date: January 16, 2020Inventors: Satoshi NAKAMURA, Kunitsugu TOMITA, Kazunori HOSHINO, Yousuke YAMANOBE, Youhei TORIYAMA
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Publication number: 20200011031Abstract: A loading amount accumulation device includes a loading amount storage section 403 storing a loading amount, a loading amount calculation section 402 accumulating load weight data about a transport object in a working front to the loading amount, and updating the loading amount by the value after being accumulated, a difference calculation section 404 calculating a difference between a loaded amount of a vessel and the loading amount, an accumulation success/failure determination section 405 comparing an absolute value of the difference and a value Dth, determining that accumulation has failed when the absolute value is larger than the value Dth, and outputting a result, a loading amount correction section 406, when the failure is output as the result, performing correction so as to set the loaded amount data as the loading amount, and updating the loading amount by the corrected loading amount, and an output section outputting the loading amount.Type: ApplicationFiled: October 27, 2017Publication date: January 9, 2020Inventor: Kunitsugu TOMITA