Makita Corporation

Masahiro Watanabe

Hitoshi Suzuki

Takuya Kusakawa

Hidenori Nagasaka

Masanori Furusawa

Toshiyuki Kani

Yoshihiro Kasuya

Jiro Suzuki

Hajime Takeuchi

Ryunosuke Kumagai

Yoshitaka Ichikawa

Yuki Kawai

Motohiro Omura

Kosuke Ito

Yasuhito Kawai

Goshi Ishikawa

Katsuna Hayashi

Shunta Mizuno

Shinichi Hira

Kazuya Kimura

Masanori Hayashi

Jun Ota

A rebar tying tool () include a feed mechanism (), which includes a first motor () and feeds a wire (W), and a twisting mechanism, which includes a second motor () and twists together one or more portions of the wire. A control unit () controls the first motor and the second motor and includes a general-purpose I/O port () and a motor-control-signal output port (). A motor-control-signal-output-destination-switching circuit () inputs motor-control signals (UH, VH, WH, UL, VL, WL) from the control unit via the motor-control-signal output port and selectively outputs the inputted motor-control signals to either the first motor or the second motor in response to input of a switching signal (SW).

Rebar tying tool and electric work machine

An electric working machine in one aspect of the present disclosure includes a motor, a setter, and a controller. The setter is configured to modifiably set a change characteristic in changing a rotational state of the motor from a low speed rotation to a high speed rotation. The high speed rotation is greater than the low speed rotation in rotational frequency of the motor.

Electric working machine and method of controlling rotational state of motor of electric working machine

An electric working machine in one aspect of the present disclosure includes a motor, a controller, and a setter. The controller is configured to change a rotational state of the motor, in response to an establishment of a condition for change after the motor is initiated, from a low speed rotation to a high speed rotation. The setter is configured to set, based on a situation in the motor in the low speed rotation, a control variable of the motor in the high speed rotation and/or the condition for change.

An electric power tool includes a motor and a controller. The controller is configured to control the motor. Specifically, the controller is configured to operate in at least two modes: a first mode and a second mode. The first mode includes a plurality of stages having different control conditions related to the motor. The second mode includes at least a common stage having control conditions same as those for a specific stage among the plurality of stages of the first mode. The common stage of the second mode starts more quickly than the specific stage of the first mode.

Electric power tool configured to operate in a normal mode with a specific stage, and in a measurement mode with a common stage

A variable speed switch includes a switch main body portion which is accommodated in a housing of an electric power tool and mounted to the housing so as to be capable of relative movement, and a load sensor which is provided in the switch main body portion and capable of outputting an electric signal in proportion to the amount of distortion caused by a pressing force. The switch operating portion is mounted on the surface of the housing so as to be capable of relative displacement with respect to the housing and transmits a pressing force applied to the switch operating portion to the load sensor, with the maximum displacement amount of the switch operating portion being set to equal to or less than 5 mm.

Variable speed switch and electric power tool with the variable speed switch mounted thereto

An effective technique for detecting several load conditions different in presence or absence and magnitude of load applied to a tool bit is provided in a hand-held tool. A hand-held toolperforms a predetermined operation while pressing a tool bitmounted in a front end region of a tool bodyagainst a workpiece. A plurality of detecting sensorsof different kinds detect several load conditions different in presence or absence and magnitude of load applied to the tool bit. The hand-held toolincludes at least one of an indicating devicewhich indicates the load conditions based on a result detected by the detecting sensors, and a driving control devicewhich controls driving of the tool bitbased on the detected result.

Hand-held tool

An electric power tool can include a main body, which rotates a motor with a pull operation of the switch lever and actuates a head tool by a rotative force of the motor, and an auxiliary tool configured for attaching and detaching to and from the electric power tool main body. In the main body, an actuating part actuated with the pull operation of the switch lever is provided. The auxiliary tool includes a detecting part, which noncontactly detects an actuation of the actuating part, and an electric circuit section for actuating electric devices, provided in the auxiliary part, by a detecting actuation of the detecting part.

Electric power tool

A power tool includes a motor, a first device and a second device. The motor receives a supply of an electric power from a power source externally of the power tool. The first device determines if the electric power supplied from the power source is an AC power or a DC power. The second device permits or interrupts the supply of the electric power to the motor depending on the determination of the first device.

Power tools

Power tools are taught that may include, for example, a detector for detecting impact sounds generated, e.g. by a hammer strikes an anvil or by oil pulse from an oil unit. The detector may include a receiver () adapted to selectively convert sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver (). A processormay be utilized to control the motor () in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detector. In addition or in the alternative, various structures can be used to set various operating conditions, including dials, sound sensors, keypads and remote control devices. Further, structures for performing maintenance condition status checks are taught.

It is an object of the invention to easily determine a currently-selected operation mode in a power tool which offers several operation modes. A representative electric hammer drillembodying a power tool according to the invention has a controllerfor at least controlling a driving motor. The controllerincludes a switch detecting circuitthat detects the on or off state of each of first and second switcheswhen power is on, a computing/driving sectionthat determines a current operation mode based on results of detection of the switch detecting circuit, and a motor control sectionand a drive circuitthat output a drive control signal to the driving motorwhen the switch in the off state is turned on after the computing/driving sectiondetermines the operation mode.

Power tool

An electric power tool, which comprises a motor that drives a tool, a power source unit that applies voltage to the motor, a main switching circuit that makes/breaks an electrical connection between the power source unit and the motor, an illuminator that illuminates a work spot, a switching device that electrically connects the illuminator to the power source unit, and an OR circuit that is electrically connected to terminals of the motor to the base terminal is provided. The OR circuit electrically connects one of the motor terminals at which a voltage is higher to the base terminal.

Power tools are taught that may include, for example, means for detecting impact sounds generated, e.g. by a hammer strikes an anvil or by oil pulse from an oil unit. The detecting means may include a receiver () adapted to selectively convert sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver (). A processormay be utilized to control the motor () in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detecting means. In addition or in the alternative, various means for setting various operating conditions are taught, including dials, sound sensors, keypads and remote control devices. Further, means for performing maintenance condition status checks are taught.

The object of the invention is to ease of operation of the power impact tool. Such object is achieved by a representative power impact tool according to the invention including a motor, a tool bit, a trigger and a mode changing member. The trigger is manually operated by a user to control energization and non-energization of current to drive the motor. The motor is energized when the user operates the trigger to turn on and the energized state of the motor is maintained until the trigger is again operated in a same manner with the turning-on operation. According to the invention, once the trigger is depressed from the initial position to the operating position, a hammering operation can be performed by the striking movement of the tool bit without the need to lock the trigger in the operating position. Therefore, ease of operation of the hammer drill is enhanced.

Power impact tool

A detector is disclosed that detects impact sounds, e.g., a hammer striking an anvil or oil pulses from an oil unit. The detector may comprise a receiver that selectively converts sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver. A processor may be utilized to control the motor in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detector. In addition, the operating conditions can be set by a number of methods, including dials, sound sensors, keypads and remote control devices. Further, means for performing maintenance condition status checks are taught.

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Anjo, Japan

Masahiro Watanabe