169 patents
Utility
Work Machine
18 Jan 24
This work machine includes: a first hydraulic cylinder and a second hydraulic cylinder that telescope a telescopic boom on the basis of hydraulic oil supply and discharge, a switching valve that is disposed on a pressure relief circuit for connecting the first hydraulic cylinder and the second hydraulic cylinder to a tank, and a control unit that causes the switching valve to connect the first hydraulic cylinder to the tank and releases the pressure in the first hydraulic cylinder when contracting or extending the second hydraulic cylinder in a condition in which the first hydraulic cylinder is contracted.
Yasuhiro FUKUMORI, Naoto KAWABUCHI
Filed: 18 Nov 21
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
Estimation Apparatus and Crane
21 Dec 23
Provided is an estimation apparatus for estimating a number of wound layers of a wire rope in a crane including a boom, a winch drum, and the wire rope wound around the winch drum, the estimation apparatus being mounted on the crane, the estimation apparatus including: a calculation unit that calculates a delivery length of the wire rope; a detection unit that detects a rotational amount of the winch drum; and a control unit that estimates the number of wound layers, based on a difference in the delivery length of the wire rope and a difference in the rotational amount of the winch drum between a first orientation. and a second orientation of the boom.
Shoji NISHIMOTO
Filed: 29 Mar 22
Utility
Crane
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
Work vehicle
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
Crane, Crane Characteristic Change Determination Device, and Crane Characteristic Change Determination System
23 Nov 23
This crane is capable of transporting cargo and includes: a feedback control unit for feedback control of the crane or an object to be controlled that is a component of the crane; a learning model that has a weighting factor and learns the characteristics of the object to be controlled in real time by adjusting the weighting factor on the basis of a teacher signal including a first signal generated by the feedback control unit; and a communication control unit that transmits the weighting factor to an external device that is communicatively connected to the crane.
Yoshimasa MINAMI
Filed: 19 Oct 21
Utility
Work Vehicle
9 Nov 23
This work machine includes: a telescoping actuator that moves a first boom in the telescoping direction with respect to a second boom; an electrical drive source that is disposed in a movable portion of the telescoping actuator; a first connection mechanism that switches a connection state between the telescoping actuator and the first boom on the basis of the power of the electrical drive source; a second connection mechanism that switches a connection state between the first boom and the second boom on the basis of the power of the electrical drive source; and a control device that controls operation of the electrical drive source.
Masahide ZUSHI, Manato SHIRAI, Kazu NAGAHAMA
Filed: 21 Aug 20
Utility
Tack welding method and tack welding apparatus
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
Crane
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
Crane vehicle
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
Dynamic Lift-off Control Device and Mobile Crane
14 Sep 23
This dynamic lift-off control device, which is mounted on a crane having a boom and a winch for winding a wire rope and controls dynamic lift-off of a suspended load, comprises: an image-capturing unit that is installed at the tip of the boom and captures an image including a hook; and a control unit that controls a winding action of the winch and a raising action of the boom.
Shohei NAKAOKA
Filed: 28 Jul 21
Utility
Crane Position Determination Device, Mobile Crane, and Crane Position Determination Method
31 Aug 23
There is provided a crane position determination device that is to be mounted on a mobile crane, the crane position determination device including: an input unit that receives input of the working conditions of crane work; a determination unit that has a learning model and determines the placement position of the mobile crane on the basis of output from the learning model; and a notification unit that provides notification of the placement position of the mobile crane, wherein on the basis of a reward function including at least one evaluation function pertaining to the crane work, the learning model learns to output information pertaining to the optimum placement position of the mobile crane with respect to the working conditions.
Marudan KIJI
Filed: 27 Jul 21
Utility
Hybrid welding device
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
Crane and crane control method
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
Dynamic Lift-off Control Device, and Crane
20 Jul 23
A dynamic lift-off control device that is mounted on a crane including a boom and a winch for winding a wire rope and that controls dynamic lift-off of a suspended load, wherein: the dynamic lift-off control device comprises a load detection unit that detects a load acting on the boom, and a control unit that controls a winding action of the winch and a hoisting action of the boom; and the control unit controls the hoisting of the boom by using a control signal, which is generated on the basis of the change over time in the value detected by the load detection unit and to which a filter for attenuating a frequency component in a prescribed range, to suppress swaying of the suspended load is applied.
Yoshimasa MINAMI
Filed: 3 Jun 21
Utility
Method for controlling crane, and crane
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
Telescopic Boom
6 Jul 23
A lightweight and high-rigidity telescopic boom in which strain during manufacturing is suppressed is disclosed.
Kenji Shimizu, Kazuhiro Kobayashi
Filed: 7 Jun 21
Utility
Crane
4 Jul 23
A crane is provided.
Yoshimasa Minami
Filed: 3 Jul 19
Utility
Crane
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