Patents by Inventor Shinjiro Yamamoto
Shinjiro Yamamoto 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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Publication number: 20240133157Abstract: Provided is a work machine control system which enables a worker to perform a work more easily in the vicinity of a work machine executing a task automatically. A work machine control system comprises: a work machine that executes a task automatically as a work to be executed; and a task control device for controlling execution of the task. The work machine comprises a vehicle body control device and a hydraulic actuator used for executing the task, wherein the vehicle body control device comprises: a task content input section for receiving input of task content information; a movement control section for calculating a speed instruction of the hydraulic actuator based on the task content information; a receiving section for receiving task control information outputted from the task control device having a task control input section for receiving input of the task control information; and a task control section for controlling execution of the task based on the task control information.Type: ApplicationFiled: March 14, 2022Publication date: April 25, 2024Inventors: Shinjiro YAMAMOTO, Shinya IMURA, Koji SHIWAKU, Hiroki ISHII
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Patent number: 11965315Abstract: The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energy-saving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.Type: GrantFiled: December 8, 2021Date of Patent: April 23, 2024Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kento Kumagai, Shinya Imura, Yasutaka Tsuruga, Takaaki Chiba, Hiroaki Amano, Shinji Nishikawa, Akihiro Narazaki, Genroku Sugiyama, Shinjiro Yamamoto
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Publication number: 20230358022Abstract: The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energy-saving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.Type: ApplicationFiled: December 8, 2021Publication date: November 9, 2023Inventors: Kento KUMAGAI, Shinya IMURA, Yasutaka TSURUGA, Takaaki CHIBA, Hiroaki AMANO, Shinji NISHIKAWA, Akihiro NARAZAKI, Genroku SUGIYAMA, Shinjiro YAMAMOTO
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Publication number: 20230332379Abstract: A work machine includes hydraulic actuators that drive a work implement, and a controller configured to output a control signal for controlling each hydraulic actuator on the basis of a velocity command to each actuator computed at each computation cycle. When controlling an action of a first hydraulic actuator under a predetermined condition according to an action of a second hydraulic actuator, the controller computes a velocity command to the first hydraulic actuator at a current computation cycle, with use of an actual velocity of each hydraulic actuator at the current computation cycle computed on the basis of a sensing signal of a posture sensor and a history of past velocity commands to each hydraulic actuator computed at previous computation cycles before the current computation cycle, and outputs a control signal according to the velocity command to the first hydraulic actuator at the current computation cycle.Type: ApplicationFiled: February 4, 2022Publication date: October 19, 2023Inventors: Hiroki ISHII, Shinjiro YAMAMOTO
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Publication number: 20230323630Abstract: Provided is a remote operation device capable of remotely operating efficiently and safely a work machine that is operated from a remote location, even when a communication delay occurs. The remote operation device includes a communication control section 222 that receives a camera video image of a work site captured by a vehicle-mounted camera 91 and vehicle body information of the work machine (hydraulic shovel) 1, a predicted trajectory computing section 220 that computes a predicted trajectory of the work machine (hydraulic shovel) 1 from the vehicle body information and outputs predicted trajectory data to be displayed as a video image on a display device 202, and a display control section 221 that causes the display device 202 to display the camera video image and the video image of the predicted trajectory on the same screen (simultaneously).Type: ApplicationFiled: February 18, 2022Publication date: October 12, 2023Inventors: Shinya KASAI, Masamichi ITO, Shinjiro YAMAMOTO
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Publication number: 20230304261Abstract: A work machine includes: a work device; a posture sensor that senses posture information of the work device; a hydraulic actuator that drives the work device; and a controller configured to generate operation plan information on the basis of task information necessary for automatic control, the task information being obtained from an external system, and perform automatic control of the hydraulic actuator on the basis of the operation plan information and a sensing result of the posture sensor. The controller outputs the operation plan information to the external system. The controller does not perform the automatic control when an approval signal indicating that the operation plan information is approved is not input from the external system. The controller performs the automatic control when the approval signal is input from the external system.Type: ApplicationFiled: February 28, 2022Publication date: September 28, 2023Inventors: Hiroki ISHII, Shinya IMURA, Shinjiro YAMAMOTO, Koji SHIWAKU
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Patent number: 11739502Abstract: Provided is a work machine which can increase the operation speed of an actuator by a regeneration function while securing the position control accuracy of the actuator. A controller is configured to calculate a regeneration flow rate on the basis of an input amount of an operation lever and a target actuator flow rate, subtract the regeneration flow rate from the target actuator flow rate to calculate a target actuator supply flow rate, calculate a target flow rate control valve opening amount on the basis of the target actuator supply flow rate, calculate a target pump flow rate that is equal to or higher than a total target actuator supply flow rate, control a selector valve on the basis of the input amount of the operation lever, control a flow rate control valve according to the target flow rate control valve opening amount, and control a hydraulic pump according to the target pump flow rate.Type: GrantFiled: March 18, 2021Date of Patent: August 29, 2023Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Kento Kumagai, Shinya Imura, Yasutaka Tsuruga, Takaaki Chiba, Hiroaki Amano, Shinji Nishikawa, Akihiro Narazaki, Genroku Sugiyama, Shinjiro Yamamoto
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Publication number: 20230243126Abstract: Provided is a control system for a work machine that allows a worker in the operation around the work machine to safely approach the work machine. The control system for a work machine includes: a work machine 1 including a work implement 7, a lock mechanism 14 for the work implement 7, a lock controller 13 that controls the lock mechanism 14, and a communication device 20; and a communication terminal 30 that is able to communicate with the communication device 20 of the work machine 1. The lock controller 13 controls the lock mechanism 14 so as not to be released from a locked state in a case receiving a lock demand signal from the communication terminal 30, and controls the lock mechanism 14 so as to be released from the locked state in a case receiving a lock demand cancellation signal from the communication terminal 30.Type: ApplicationFiled: September 1, 2020Publication date: August 3, 2023Inventors: Shinjiro YAMAMOTO, Shinya IMURA
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Publication number: 20230235539Abstract: An overhead-view image of a work site is presented to an operator of a work machine even when the number of imaging devices at a construction site is lacking. The present disclosure provides an information presentation device for generating and outputting a terrain image relating to a construction site. The information presentation device includes a storage device that stores a program for performing a predetermined imaging process on the terrain image, and a processor for reading the program from the storage device and generating the terrain image.Type: ApplicationFiled: January 6, 2022Publication date: July 27, 2023Inventors: Yuho SAITO, Takaaki CHIBA, Shinjiro YAMAMOTO, Shinya IMURA
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Publication number: 20230167622Abstract: An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.Type: ApplicationFiled: March 31, 2021Publication date: June 1, 2023Inventors: Kento KUMAGAI, Shinya IMURA, Yasutaka TSURUGA, Takaaki CHIBA, Hiroaki AMANO, Shinji NISHIKAWA, Akihiro NARAZAKI, Genroku SUGIYAMA, Shinjiro YAMAMOTO
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Publication number: 20220333348Abstract: Provided is a work machine which can increase the operation speed of an actuator by a regeneration function while securing the position control accuracy of the actuator. A controller is configured to calculate a regeneration flow rate on the basis of an input amount of an operation lever and a target actuator flow rate, subtract the regeneration flow rate from the target actuator flow rate to calculate a target actuator supply flow rate, calculate a target flow rate control valve opening amount on the basis of the target actuator supply flow rate, calculate a target pump flow rate that is equal to or higher than a total target actuator supply flow rate, control a selector valve on the basis of the input amount of the operation lever, control a flow rate control valve according to the target flow rate control valve opening amount, and control a hydraulic pump according to the target pump flow rate.Type: ApplicationFiled: March 18, 2021Publication date: October 20, 2022Inventors: Kento KUMAGAI, Shinya IMURA, Yasutaka TSURUGA, Takaaki CHIBA, Hiroaki AMANO, Shinji NISHIKAWA, Akihiro NARAZAKI, Genroku SUGIYAMA, Shinjiro YAMAMOTO
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Publication number: 20220282459Abstract: Provided is an operation assistance system for a work machine having both operation assistance and work assistance functions, capable of reducing the inconvenience to an operator or the like of setting an area of the operation assistance function and an area of the work assistance function, and preventing a collision of the work machine with an object in a work area. The operation assistance system for a work machine has the operation assistance function of stopping a hydraulic excavator (work machine) 1 when an object is detected in a stop area 40 set in advance and the work assistance function of preventing the hydraulic excavator (work machine) 1 from going out of a work area 51 set in advance.Type: ApplicationFiled: March 25, 2020Publication date: September 8, 2022Inventors: Takaaki CHIBA, Shinya IMURA, Shinjiro YAMAMOTO, Masamichi ITO, Koji SHIWAKU
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Publication number: 20220267998Abstract: There is provided a construction machine that achieves both safety and operability by lowering the possibility of an accident due to contact between the construction machine and a worker in the periphery of a vehicle body while securing operability in situations where an object required for work is present in the periphery. A controller has a normal mode as a control mode for making the operation limiting control effective and a temporary cancelation mode as a control mode for temporarily canceling the operation limiting control. The controller shifts to the temporary cancelation mode in response to operation of the control canceling device while in the normal mode. The controller shifts back to the normal mode in a case where a predetermined condition not responsive to operation of the control canceling device is satisfied while in the temporary cancelation mode.Type: ApplicationFiled: June 11, 2020Publication date: August 25, 2022Inventors: Shinji NISHIKAWA, Koji SHIWAKU, Shinjiro YAMAMOTO, Ryota KAMEOKA, Akihiro NARAZAKI
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Patent number: 11391020Abstract: There is provided a work machine that can limit operation of a work device by MC, and improves the responsiveness of a hydraulic actuator to operation of an operation device by an operator, and ensures operability equivalent to that of a work machine that does not have MC functions, and allows the hydraulic actuator for which the operation device is not being operated to automatically operate in either direction of the operation directions thereof. For this purpose, a drive system includes a selector valve 203a disposed between a secondary port 134a of an operation device 45a and a flow control valve 15a and between a proportional solenoid valve 54a and the flow control valve 15a and a selector valve 203b disposed between a secondary port 134b of the operation device 45a and the flow control valve 15a and between a proportional solenoid valve 54b and the flow control valve 15a.Type: GrantFiled: May 20, 2020Date of Patent: July 19, 2022Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hiroki Ishii, Shinjiro Yamamoto, Masamichi Itou, Yasutaka Tsuruga, Shinya Imura
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Publication number: 20220154741Abstract: There is provided a work machine that can limit operation of a work device by MC, and improves the responsiveness of a hydraulic actuator to operation of an operation device by an operator, and ensures operability equivalent to that of a work machine that does not have MC functions, and allows the hydraulic actuator for which the operation device is not being operated to automatically operate in either direction of the operation directions thereof. For this purpose, a drive system includes a selector valve 203a disposed between a secondary port 134a of an operation device 45a and a flow control valve 15a and between a proportional solenoid valve 54a and the flow control valve 15a and a selector valve 203b disposed between a secondary port 134b of the operation device 45a and the flow control valve 15a and between a proportional solenoid valve 54b and the flow control valve 15a.Type: ApplicationFiled: May 20, 2020Publication date: May 19, 2022Inventors: Hiroki ISHII, Shinjiro YAMAMOTO, Masamichi ITOU, Yasutaka TSURUGA, Shinya IMURA
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Publication number: 20130116936Abstract: A bearing damage detection method, comprising: executing frequency analysis for a vibration waveform of the vibration at the bearing obtained through measurement by sensor; setting at least two frequency ranges each substantially equal to a range defined by a rotation frequency fr of the moving ring which do not overlap, based upon results of the frequency analysis; obtaining peak frequencies, each manifesting in one of the plurality of frequency ranges having been set; and determining that the bearing is to be damaged upon deciding that the difference between the peak frequencies and the k multiple of the rotation frequency fr having been compared with each other may be regarded to be matched.Type: ApplicationFiled: July 21, 2011Publication date: May 9, 2013Inventor: Shinjiro Yamamoto
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Patent number: 4562193Abstract: Compounds of formula (I): ##STR1## (in which R.sup.1, R.sup.2 and R.sup.6 represent hydrogen or methyl, R.sup.3 represents methyl or ethyl, R.sup.4 represents an alkyl group or allyl and R.sup.5 represents hydrogen, methyl or chlorine) and acid addition salts thereof have acaricidal and insecticidal activity and may be formulated with suitable carriers or diluents for agricultural, horticultural or domestic use. Processes for the preparation of these compounds are also disclosed.Type: GrantFiled: July 8, 1983Date of Patent: December 31, 1985Assignees: Sankyo Company Limited, UBE Industries Ltd.Inventors: Shinjiro Yamamoto, Shinji Yokoi, Keigo Matsumoto, Takeo Honda, Takashi Kobayashi
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Patent number: 4435402Abstract: Compounds having the formula (I) ##STR1## [wherein: R.sup.1 and R.sup.2 are each alkyl or halogen, or they are trimethylene or tetramethylene; R.sup.3 is hydrogen or alkyl; A is alkylene; and R.sup.4 is optionally substituted phenyloxy or benzyloxy substituted with at least one alkyl, halogen, alkoxy, alkylthio, alkenyl, trifluoromethyl or nitro; optionally substituted phenyl substituted with one or two halogen atoms, alkyl or alkoxy; furyl or thienyl] and their salts.Type: GrantFiled: January 22, 1982Date of Patent: March 6, 1984Assignees: Sankyo Company, Limited, Ube Industries, LimitedInventors: Hideakira Tsuji, Shinjiro Yamamoto, Kazuto Nakagami, Takeo Honda, Katsutoshi Fujii, Takashi Kobayashi, Tokio Obata, Mikio Kojima, Yuji Akiyoshi
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Patent number: 4346171Abstract: A new compound, named "Compound B-41D", has the formula: ##STR1## and can be prepared by cultivating a microorganism of the genus Streptomyces, especially Streptomyces strain B-41-146. Compound B-41D has valuable acaricidal and anthelmintic activities.Type: GrantFiled: August 18, 1980Date of Patent: August 24, 1982Assignee: Sankyo Company, LimitedInventors: Yo Takiguchi, Hiroshi Mishima, Shinjiro Yamamoto, Michiya Terao
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Patent number: 4056617Abstract: New organic phosphorus compounds having the formula ##STR1## wherein R.sub.1 represents an alkyl group of 1-4 carbon atoms, R.sub.2 represents an alkoxy group of 1-4 carbon atoms or phenyl group and R.sub.3 represents hydrogen atom, an alkyl group of 1-4 carbon atoms, phenyl group or the group of the formula -X-R.sub.4 in which R.sub.4 represents an alkyl group of 1-6 carbon atoms or a benzyl group which may be substituted with a halogen atom in the phenyl moiety and X represents oxygen atom or sulfur atom. The present compounds are prepared by reacting a phosphoric or phosphonic acid halide having the formula ##STR2## wherein R.sub.1 and R.sub.2 are as defined above and Y represents a halogen atom with a pyridazinone derivative having the formula ##STR3## wherein R.sub.3 is as defined above. The present compounds show a superior insecticidal activity against various harmful insects, e.g.Type: GrantFiled: October 6, 1975Date of Patent: November 1, 1977Assignee: Sankyo Company LimitedInventors: Teruomi Jojima, Hideakira Tsuji, Shinjiro Yamamoto, Teiji Omino