Patents Assigned to Sakai Heavy Industries, Ltd.
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Patent number: 11829151Abstract: A construction-vehicle autonomous travel control device to correct a steering angle so as to direct to a target point set on a target track includes: an expected arrival point calculator to calculate an expected arrival point of a vehicle to arrive after a predetermined time based on a vehicle speed and a steering angle; and a corrected steering angle calculator to calculate a corrected steering angle so as to direct the expected arrival point to the target point.Type: GrantFiled: July 16, 2019Date of Patent: November 28, 2023Assignee: SAKAI HEAVY INDUSTRIES, LTDInventors: Ryohei Endo, Shigeki Kushida
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Patent number: 11733704Abstract: A construction-vehicle autonomous travel control device to correct a steering angle so as to direct to a target point set on a target track includes: an expected arrival point calculator to calculate an expected arrival point of a vehicle to arrive after a predetermined time based on a vehicle speed and a steering angle; and a corrected steering angle calculator to calculate a corrected steering angle so as to direct the expected arrival point to the target point.Type: GrantFiled: July 16, 2019Date of Patent: August 22, 2023Assignee: SAKAI HEAVY INDUSTRIES, LTDInventors: Ryohei Endo, Shigeki Kushida
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Patent number: 11492765Abstract: Provided is a construction vehicle including: a rolling-use hydraulic pump coupled to an output shaft of an engine and supplying hydraulic oil to a rolling-use hydraulic circuit; a task-use hydraulic pump coupled to the output shaft of the engine and supplying the hydraulic oil to a task-use hydraulic circuit; and an overspeed suppression mechanism configured to activate the task-use hydraulic pump to suppress overspeed of the engine when a load equal to or greater than allowable rotation speed is applied from the rolling-use hydraulic pump to the output shaft of the engine.Type: GrantFiled: December 12, 2018Date of Patent: November 8, 2022Assignee: SAKAI HEAVY INDUSTRIES, LTD.Inventors: Shinji Ishida, Kenta Toyoshima
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Patent number: 11332894Abstract: A rammer includes: an outer cylinder (31); an inner cylinder (32) slidably contacted with an inside of the outer cylinder (31); a slider (33) connected to a connecting rod (14) and slidably provided in the inner cylinder (32); a first coil spring (34) housed in the upper part of the inner cylinder (32); and a second coil spring (35) housed in the lower part of the inner cylinder (32), wherein the slider (33) is disposed between the first coil spring (34) and the second coil spring (35), wherein a crank shaft has a rotational axis disposed orthogonally to the moving direction, and the first coil spring (34) and the second coil spring (35) have respectively different winding directions to each other.Type: GrantFiled: February 21, 2019Date of Patent: May 17, 2022Assignee: SAKAI HEAVY INDUSTRIES, LTD.Inventors: Tetsuya Koseki, Hikaru Hosaka
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Patent number: 11274402Abstract: A control device for controlling a vibrating roller that generates vibration on a front wheel and a rear wheel, includes a front wheel vibration start signal output unit that outputs a front wheel vibration start signal for starting vibration of the front wheel so as to give vibration at a predetermined number of times to a road surface to be constructed per unit length, a calculation unit that calculates the rear wheel vibration start timing based on a time width required from the start of vibration of the rear wheel to the vibration at a frequency that can give vibration to the road surface to be constructed a predetermined number of times, and a rear wheel vibration start signal output unit which outputs a rear wheel vibration start signal which starts the vibration of the rear wheel at the rear wheel vibration start timing.Type: GrantFiled: August 31, 2020Date of Patent: March 15, 2022Assignee: Sakai Heavy Industries, Ltd.Inventors: Hiroaki Fujimoto, Fusayoshi Koike
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Patent number: 11274403Abstract: A rammer includes: an engine; a reciprocating mechanism (3) including a crank shaft (13) and a connecting rod (14), and configure to convert a rotational force of the engine into a reciprocatory force; a leg part disposed in a forward inclined position in a traveling direction and configure to be moved up and down by the connecting rod (14); and a compacting plate disposed on a bottom end of the leg part. The crank shaft (13) is disposed orthogonally to the traveling direction. The reciprocating mechanism (3) includes a belt reduction mechanism (16) and a gear reduction mechanism (17).Type: GrantFiled: December 12, 2018Date of Patent: March 15, 2022Assignee: SAKAI HEAVY INDUSTRIES, LTD.Inventors: Tetsuya Koseki, Dekun Wang
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Publication number: 20220064876Abstract: A control device for controlling a vibrating roller that generates vibration on a front wheel and a rear wheel, includes a front wheel vibration start signal output unit that outputs a front wheel vibration start signal for starting vibration of the front wheel so as to give vibration at a predetermined number of times to a road surface to be constructed per unit length, a calculation unit that calculates the rear wheel vibration start timing based on a time width required from the start of vibration of the rear wheel to the vibration at a frequency that can give vibration to the road surface to be constructed a predetermined number of times, and a rear wheel vibration start signal output unit which outputs a rear wheel vibration start signal which starts the vibration of the rear wheel at the rear wheel vibration start timing.Type: ApplicationFiled: August 31, 2020Publication date: March 3, 2022Applicant: Sakai Heavy Industries, Ltd.Inventors: Hiroaki Fujimoto, Fusayoshi Koike
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Patent number: 9458580Abstract: A compaction roller comprises a vibration device for generating vibrations when driven by a vibration motor; a pair of right and left traveling drive shafts, while traveling driving outside tires and their adjoining inside tires synchronously, for transmitting the vibrations of the vibration device to the outside tires and inside tires; a pair of right and left traveling motors respectively for driving their associated traveling drive shafts; and, a pair of right and left first support brackets mounted through a first vibration proof device 6 on a vehicle body and interposed between the outside tires and inside tires for supporting the traveling drive shafts through bearings, wherein the vibration device includes a vibration source disposed within the traveling drive shafts. According to the compaction roller, a side overhang can be eliminated or reduced, and enabling prevention of the lowered vibration compacting function of the tires.Type: GrantFiled: August 28, 2015Date of Patent: October 4, 2016Assignee: Sakai Heavy Industries, Ltd.Inventors: Sadayoshi Suzuki, Hiroaki Neko, Akira Mitsui
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Publication number: 20160060821Abstract: A compaction roller comprises a vibration device for generating vibrations when driven by a vibration motor; a pair of right and left traveling drive shafts, while traveling driving outside tires and their adjoining inside tires synchronously, for transmitting the vibrations of the vibration device to the outside tires and inside tires; a pair of right and left traveling motors respectively for driving their associated traveling drive shafts; and, a pair of right and left first support brackets mounted through a first vibration proof device 6 on a vehicle body and interposed between the outside tires and inside tires for supporting the traveling drive shafts through bearings, wherein the vibration device includes a vibration source disposed within the traveling drive shafts. According to the compaction roller, a side overhang can be eliminated or reduced, and enabling prevention of the lowered vibration compacting function of the tires.Type: ApplicationFiled: August 28, 2015Publication date: March 3, 2016Applicant: Sakai Heavy Industries, Ltd.Inventors: Sadayoshi Suzuki, Hiroaki Neko, Akira Mitsui
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Patent number: 8479861Abstract: A travelling control apparatus 1 includes: rotational speed ratio detection units 2 configured to output signals S1, S2 of respective rotational speeds of front and rear wheels; a rotational speed ratio calculation measure 3 for calculating data Da of a rotational speed ratio of the wheels from the signals S1, S2; a rotational speed ratio sort measure 4 for sorting the data Da into data D1 within a range of a set range T1 and data D2 out of the range; a reference data generation measure 5 for averaging the data D1 and generating an average value thereof as reference data Ds; and a slip determination measure 6 for comparing data Da1 of the rotational speed ratio of the wheels with the reference data Ds, and in a case of the data Da1 being out of a set range T2, for determining that one of the wheels is slipping.Type: GrantFiled: March 18, 2008Date of Patent: July 9, 2013Assignee: Sakai Heavy Industries, Ltd.Inventors: Nobuyuki Haruyama, Takabumi Tezuka, Masayuki Yoshida
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Patent number: 8244439Abstract: The compaction vehicle having a speed adjustment member, a displacement detector, and a drive source controller further includes a calculation device between the displacement detector and the drive source controller, receiving the displacement S, and outputting a signal I calculated to the controller; a running speed setting switch for the operator operating ON at a desired running speed; a control signal memory device provided inside the calculation device and memorizing a signal I1 to the controller. In a normal operation, the calculation device outputs the signal I to the controller so that a running speed increases or decreases according to the displacement S, and when the switch is operated to ON, the calculation device maintains the ON state, and the displacement S is not less than a predetermined value, the calculation device outputs the signal I1 memorized in the memory device so as that the vehicle will run at a constant speed.Type: GrantFiled: August 27, 2008Date of Patent: August 14, 2012Assignee: Sakai Heavy Industries Ltd.Inventors: Sadayoshi Suzuki, Isamu Miyamoto, Shinnosuke Tanaka
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Patent number: 7689342Abstract: The compaction vehicle having a speed adjustment member, a displacement detector, and a drive source controller further includes a calculation device between the displacement detector and the drive source controller, receiving the displacement S, and outputting a signal I calculated to the controller; a running speed setting switch for the operator operating ON at a desired running speed; a control signal memory device provided inside the calculation device and memorizing a signal I1 to the controller, wherein in a normal operation the calculation device outputs the signal I to the controller so that a running speed increases or decreases according to the displacement S, and wherein when the switch is operated to ON, the calculation device maintains the ON state, and the displacement S is not less than a predetermined value, the calculation device outputs the signal I1 memorized in the memory device so as to run the vehicle at a constant speed.Type: GrantFiled: August 4, 2006Date of Patent: March 30, 2010Assignee: Sakai Heavy Industries Ltd.Inventors: Sadayoshi Suzuki, Isamu Miyamoto, Shinnosuke Tanaka
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Publication number: 20100042298Abstract: A travelling control apparatus 1 includes: rotational speed ratio detection units 2 configured to output signals S1, S2 of respective rotational speeds of front and rear wheels; a rotational speed ratio calculation measure 3 for calculating data Da of a rotational speed ratio of the wheels from the signals S1, S2; a rotational speed ratio sort measure 4 for sorting the data Da into data D1 within a range of a set range T1 and data D2 out of the range; a reference data generation measure 5 for averaging the data D1 and generating an average value thereof as reference data Ds; and a slip determination measure 6 for comparing data Da1 of the rotational speed ratio of the wheels with the reference data Ds, and in a case of the data Da1 being out of a set range T2, for determining that one of the wheels is slipping.Type: ApplicationFiled: March 18, 2008Publication date: February 18, 2010Applicant: Sakai Heavy Industries, Ltd.Inventors: Nobuyuki Haruyama, Takabumi Tezuka, Masayuki Yoshida
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Publication number: 20090005940Abstract: The compaction vehicle having a speed adjustment member, a displacement detector, and a drive source controller further includes a calculation device between the displacement detector and the drive source controller, receiving the displacement S, and outputting a signal I calculated to the controller; a running speed setting switch for the operator operating ON at a desired running speed; a control signal memory device provided inside the calculation device and memorizing a signal I1 to the controller. In a normal operation, the calculation device outputs the signal I to the controller so that a running speed increases or decreases according to the displacement S, and when the switch is operated to ON, the calculation device maintains the ON state, and the displacement S is not less than a predetermined value, the calculation device outputs the signal I1 memorized in the memory device so as that the vehicle will run at a constant speed.Type: ApplicationFiled: August 27, 2008Publication date: January 1, 2009Applicant: Sakai Heavy Industries, Ltd.Inventors: Sadayoshi Suzuki, Isamu Miyamoto, Shinnosuke Tanaka
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Patent number: 7213479Abstract: A vibratory mechanism includes vibratory shafts, which are stored within a roll and are arranged symmetrically across a rotation axis of the roll, fixed eccentric weights fixed to respective vibratory shafts, rotatable eccentric weights rotatably attached to respective vibratory shafts, a rotation controller controlling a range of movement of the rotatable eccentric weights, and an eccentric moment controller which changes an eccentric moment around the vibratory shaft depending on the rotation direction of the vibratory shafts, whereby the vibration state of the roll is switchable between standard vibration and horizontal vibration.Type: GrantFiled: February 24, 2004Date of Patent: May 8, 2007Assignee: Sakai Heavy Industries, Ltd.Inventor: Akira Mitsui
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Publication number: 20070032934Abstract: The compaction vehicle having a speed adjustment member, a displacement detector, and a drive source controller further includes a calculation device between the displacement detector and the drive source controller, receiving the displacement S, and outputting a signal I calculated to the controller; a running speed setting switch for the operator operating ON at a desired running speed; a control signal memory device provided inside the calculation device and memorizing a signal I1 to the controller, wherein in a normal operation the calculation device outputs the signal I to the controller so that a running speed increases or decreases according to the displacement S, and wherein when the switch is operated to ON, the calculation device maintains the ON state, and the displacement S is not less than a predetermined value, the calculation device outputs the signal I1 memorized in the memory device so as to run the vehicle at a constant speed.Type: ApplicationFiled: August 4, 2006Publication date: February 8, 2007Applicant: SAKAI Heavy Industries Ltd.Inventors: Sadayoshi Suzuki, Isamu Miyamoto, Shinnosuke Tanaka
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Patent number: 6857816Abstract: A roller is equipped with a pair of crawlers. Each crawler includes a driving wheel detachably attached to a driving shaft. Each crawler also includes a set of driven wheels. Both sets of driven wheels are supported by a connecting member that is detachably attached on a bottom of a body. A roll, which is vibrated only in the perpendicular direction with respect to the ground surface, is attached to the body.Type: GrantFiled: February 8, 2002Date of Patent: February 22, 2005Assignee: Sakai Heavy Industries, Ltd.Inventors: Isao Saito, Koichi Kaneko, Yukitsugu Saba, Yasutsugu Kanamori, Hiroaki Neko
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Patent number: D589067Type: GrantFiled: April 23, 2008Date of Patent: March 24, 2009Assignee: Sakai Heavy Industries, Ltd.Inventor: Yuichiro Yamamoto
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Patent number: D668269Type: GrantFiled: June 22, 2011Date of Patent: October 2, 2012Assignee: Sakai Heavy Industries, Ltd.Inventors: Takabumi Tezuka, Masayuki Yoshida
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Patent number: D668694Type: GrantFiled: June 22, 2011Date of Patent: October 9, 2012Assignee: Sakai Heavy Industries, Ltd.Inventors: Takabumi Tezuka, Masayuki Yoshida