64 patents
Utility
Crane and control system for crane
2 Jan 24
A crane that controls an actuator on the basis of a target speed signal Vd of cargo W includes: a control device having a feedback control unit that calculates a target path signal Pdα of the cargo from the target speed signal Vd by integration to correct the target path signal Pdα on the basis of the differential of current position coordinates p(n) of the cargo W corresponding to the target path signal Pdα; and a feedforward control unit that adjusts a weight coefficient of a transfer function G(s) expressing the characteristics of the crane on the basis of a target path signal Pd1α that has been corrected.
Yoshimasa Minami
Filed: 18 Jul 19
Utility
Crane
2 Jan 24
A target trajectory signal is calculated by integrating a target speed signal inputted from a suspended-load moving operation tool and passing the integrated signal through a lowpass filter.
Yoshimasa Minami
Filed: 22 Jul 19
Utility
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12 Dec 23
A crane comprising a traveling body and a turning body turnably supported by the traveling body, the crane performing power feeding and communication between the traveling body and the turning body.
Masaki Shindo, Hiroshi Yamauchi, Hiroki Mizobuchi, Naoki Ishihara, Shinsuke Kanda
Filed: 7 Mar 18
Utility
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28 Nov 23
A work vehicle includes: an operation tool that is operated by an operator; and a controller that determines a target flow rate for hydraulic oil fed to a hydraulic device on a basis of the amount of operation of the operation tool.
Kazushi Sanada, Kazuya Tanizumi, Shinji Noguchi, Naoto Kawabuchi
Filed: 21 Feb 20
Utility
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31 Oct 23
A tack welding method and a tack welding apparatus that can improve the strength of a tack-welded joint portion and reduce the height of a reinforcement bead is provided.
Katsura Owaki, Isao Kawaguchi, Satomi Maki, Kosei Yamamoto, Hiroki Matsuo
Filed: 23 Aug 18
Utility
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17 Oct 23
This crane is provided with: a operable function unit; an operation unit; an actuator; a generation unit which generates a first control signal for the actuator on the basis of an operation input; a plurality of wire ropes; a plurality of hooks suspended from a leading end section of a boom by the plurality of wire ropes, respectively; a hook detection unit which detects, from among the plurality of hooks, an unused hook suspending no load; a calculation unit which calculates a resonance frequency for a wire rope, among the plurality of wire ropes, that suspends the detected unused hook; a filter unit which generates a filter on the basis of the resonance frequency and generates a second control signal by filtering the first control signal using the filter; and a control unit which controls the actuator on the basis of the second control signal.
Shinsuke Kanda, Kazuma Mizuki
Filed: 15 Mar 19
Utility
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3 Oct 23
A crane vehicle achieves safe movement by reliably detecting an obstacle in a region which is a blind spot from the opposite side of the driver seat across a boom.
Hiroyuki Hayashi
Filed: 12 Apr 19
Utility
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15 Aug 23
A hybrid welding device capable of reducing an influence of by-products such as spatters, plasma, plumes, and fume, and reducing contamination of a laser optical system and welding defects is provided.
Katsura Owaki, Isao Kawaguchi, Satomi Maki, Hiroki Matsuo, Takahiro Akizuki, Naoya Sawada
Filed: 15 May 19
Utility
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8 Aug 23
The invention addresses the problem of providing a crane and a crane control method that can suppress load swaying when controlling an actuator on the basis of the load.
Yoshimasa Minami
Filed: 13 Mar 19
Utility
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18 Jul 23
There is provided a method for controlling a crane, with which the position of a hook is automatically adjusted before lift-off, where a freely-derricking telescopic boom is provided to a swivel base, a main hook is suspended with a main wire rope from a distal end section of the telescopic boom, and a suspended load is suspended on a main hook with slinging wire ropes, wherein post-slinging lift-off is preceded by a hook position adjustment control involving repeating: a first process where the control device controls so as to reel in the main wire rope to a position where the main wire rope is tensed; and a second process where the control device controls so as to move the distal end section of the telescopic boom in the same direction of a horizontal direction component of the movement of the main hook in the first process.
Shinsuke Kanda, Shoji Nishimoto, Kazuma Mizuki
Filed: 3 Oct 18
Utility
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4 Jul 23
A crane is provided.
Yoshimasa Minami
Filed: 3 Jul 19
Utility
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16 May 23
The resonant frequency ωx(n) of horizontal shaking of a suspended load W suspended from the distal end of a telescopic boom 9 via wire ropes 14·16 is calculated on the basis of the suspension length Lm(n)·Ls(n) of the wire ropes 14·16; the characteristic frequency ωy(n) in the raising and lowering direction of the telescopic boom 9 is calculated; and, in accordance with an operation for raising and lowering the telescopic boom 9, the filtering control signal Cd(n) of an actuator is generated in which a frequency component in a discretionary frequency range is attenuated at a discretionary ratio with reference to the resonant frequency ωx(n) of the suspended load W, and in which a frequency component in a discretionary frequency range is attenuated at a discretionary ratio with reference to the characteristic frequency ωy(n) in the raising and lowering direction of the telescopic boom 9.
Shinsuke Kanda, Kazuma Mizuki
Filed: 28 Sep 18
Utility
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18 Apr 23
There is provided a crane including: a telescopic boom having an inner boom element and an outer boom element; a telescoping actuator that displaces the inner boom element or the outer boom element in the telescoping direction; a first coupling member that releasably couples the telescoping actuator to one of the boom elements; a second coupling member that releasably couples the pair of boom elements to each other; an electric drive source provided at the telescoping actuator; a first coupling mechanism that displaces the first coupling member or the second coupling member on the basis of motive power of the electric drive source, thereby switching a coupled state and a non-coupled state of the members that are releasably coupled by one of the coupling members; and a position information detection device that detects information relating to the position of one of the coupling members on the basis of output from the electric drive source.
Masahide Zushi, Kazu Nagahama
Filed: 14 Feb 19
Utility
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14 Feb 23
Provided are a server for maintenance, a remote monitoring system, and a remote monitoring method.
Ryosuke Yakushi
Filed: 2 Feb 17
Utility
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24 Jan 23
To estimate the top surface of a measurement target on the basis of a data point group that corresponds to the top surface of a measurement target and is obtained using a laser scanner.
Takayuki Kosaka, Iwao Ishikawa, Satoshi Kubota, Shigenori Tanaka, Kenji Nakamura, Yuhei Yamamoto, Masaya Nakahara
Filed: 19 Jul 18
Utility
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3 Jan 23
This crane is provided with: a boom; a wire rope suspended down from a leading end section of the boom; a suspender that is fixed to a lower end of the wire rope and is for suspending a slinging tool for hanging a load; a calculation unit that calculates a first load, which is the weight of a member that is suspended down from the suspender; a slinging tool database unit that stores information pertaining to the slinging tool corresponding to the first load; a determination unit that determines whether a load is being suspended from the suspender; and a control unit that acquires the information pertaining to the slinging tool corresponding to the first load from the slinging tool database unit if the load is being suspended, and sets the vertical length of the slinging tool on the basis of the acquired information pertaining to the slinging tool.
Tomokazu Goto, Shinsuke Kanda, Kazuma Mizuki
Filed: 25 Feb 19
Utility
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3 Jan 23
To accurately present guide information which expresses the shape and height of a hoisting load and an object located near the hoisting load.
Takayuki Kosaka, Iwao Ishikawa, Satoshi Kubota, Shigenori Tanaka, Kenji Nakamura, Yuhei Yamamoto, Masaya Nakahara
Filed: 19 Jul 18
Utility
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3 Jan 23
This crane is configured by being provided with: a telescopic boom having an inside boom element and an outside boom element that overlap each other in an extendable and contractible manner; an extension/contraction actuator that displaces one boom element among the inside boom element and the outside boom element in the extending and contracting directions; at least one electric drive source provided in the extension/contraction actuator; a first coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the extension/contraction actuator and one of the boom elements; and a second coupling mechanism that operates on the basis of power from the electric drive source and that switches between the coupled state and the uncoupled state of the inside boom element and the outside boom element.
Masahide Zushi, Kazu Nagahama
Filed: 14 Feb 19
Utility
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20 Dec 22
To accurately obtain the shapes of a hoisting load and an object located near the hoisting load, and the height of the ground surface, and present an accurate warning display when the hoisting load approaches the object.
Takayuki Kosaka, Iwao Ishikawa, Satoshi Kubota, Shigenori Tanaka, Kenji Nakamura, Yuhei Yamamoto, Masaya Nakahara
Filed: 19 Jul 18
Utility
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6 Dec 22
Provided is a crane that is capable of effectively suppressing oscillation related to the pendulum resonance frequency generated in a suspended load on the basis of the suspended length of a wire rope.
Shinsuke Kanda, Kazuma Mizuki
Filed: 28 Sep 18