Hitachi Koki Co., Ltd.

Koki Holdings Co., Ltd.

Koki Holdings Kabushiki Kaisha

Takuya Konnai

Hideyuki Tanimoto

Tomomasa Nishikawa

Tatsuya Ito

Kouji Sagawa

Kenichirou Yoshida

Shinji Kuragano

Teruo Imai

Kenji Niwa

Hideaki Terashima

Akira Onose

Hayato Yamaguchi

Masateru Niyada

Kazuhiro Ootsuka

Yuuichi Konuma

A driving tool includes a housing having a support shaft for operably supporting an operating member, a contacting member which is capable of contacting and separating from a workpiece into which a fastener is to be driven, and which operates by contacting the workpiece, a pressure chamber to which and from which a compressible gas is supplied and discharged, a striking part operating in a direction to strike the fastener, a gas supply mechanism, and a transmission control member for controlling the operation of the gas supply mechanism, said operation being based on the operation of at least one of the operating member and the contacting member or the operation of both of them, wherein the fastener is struck when an operating force is applied to the operating member and to the transmission control member, and the contacting member is operated.

Driving tool

A technique capable of immediately reporting to an operator an occurrence of abnormality in an electric tool is provided. A communication terminal includes a communication-terminal-side control unit that determines whether abnormality has occurred in any of electric tools based on information acquired from the electric tools via wireless communication. When the communication-terminal-side control unit determines the occurrence of abnormality in any one of the electric tools, the occurrence of abnormality in the electric tool is reported by at least one of a report unit included in the electric tools other than the electric tool in which the occurrence of abnormality is determined and a report unit included in the communication terminal.

Abnormality reporting system for electric tools

There is provided an electric power tool having a plurality of operation modes with different rotation speeds at least in a predetermined load range. The electric power tool is capable of switching between the operation modes when a predetermined condition is satisfied even during a motor is driven, and configured such that a rotation speed of the motor is changed smoothly or in a stepwise manner at the switching between the operation modes.

Electric power tool

A technique capable of immediately reporting to an operator an occurrence of abnormality in an electric tool is provided. A communication terminalincludes a communication-terminal-side control unit that determines whether abnormality has occurred in any of electric tools, andbased on information acquired from the electric tools, andvia wireless communication. When the communication-terminal-side control unit determines the occurrence of abnormality in any one of the electric tools, and, the occurrence of abnormality in the electric tool, oris reported by at least one of a report unit included in the electric tools, andother than the electric tool, orin which the occurrence of abnormality is determined and a report unit included in the communication terminal

Abnormality reporting system and electric tool, and communication terminal

A desk-top cutting machine including: a base configured to support a workpiece; a cutting part including, a motor configured to rotary drive a cutting tool, a main cover covering an upper portion of the cutting tool, and a protective cover covering a portion of the cutting tool that is not covered by the main cover, the protective cover configured to move in a direction of exposing the cutting tool when the cutting part swings toward a bottom dead point from a top dead point; and a cutting part support mechanism configured to swingably support the cutting part, characterized in that: the motor is configured to be rotated at a first rotational speed slower than a maximum rotational speed thereof when the cutting part is positioned at the top dead point.

Desk-top cutting machine

A power tool includes a housing, an electric motor accommodated in the housing, a secondary battery that supplies electric power to the electric motor, a handle provided at the housing, a trigger switch provided at the handle for controlling electric power supply to the electric motor, a residual capacity display for displaying a residual capacity of the secondary battery, and a lock-release switch provided at the handle and configured to allow the trigger switch to be operable and to start displaying the residual capacity at the residual capacity display upon manipulation to the lock-release switch.

Power tool having display that displays residual capacity of battery

A dust collector comprises a tank having an intake opening; a head unit mounted on the tank; a motor provided on the head unit and having a rotor, a stator and an output shaft; a fan provided on the head unit and rotating under power from the motor, for sucking air or liquids into the tank from the intake opening; and a filter housed in the tank, that separates dust from the air or liquid sucked into the tank. The rotor has a coil disc having multiple roughly annular coils arranged in a circumferential direction centered on the output shaft in the direction of the axial line of the output shaft. The stator has a magnetic flux generation mechanism that generates magnetic flux that passes through the coil disc in the direction of the axial line of the output shaft.

Dust collector

An air blower comprises a motor including a rotor, a stator, and an output shaft fixed to the rotor, a fan that rotates by receiving power from the motor, a casing that retains the motor and the fan, and a handle provided at the casing. The rotor has a coil disc including a plurality of substantially annular coils arranged in the circumferential direction around the output shaft as viewed from the direction of the axial line of the output shaft. The stator has a magnetic flux generating mechanism that generates magnetic fluxes passing through the coil disc in the direction of the axial line of the output shaft.

Air blower

The portable abrasive tool comprises a flat motor composed of a rotor having a coil disk in the form of a disk on which multiple coil pieces are arranged in the circumferential direction about the output shaft when seen in the direction of the axis line of the output shaft and a stator having magnets arranged in the manner that the magnetic flux passes through the coil disk in the direction of the axis line of the output shaft, and an abrasive part connected to one end of the output shaft of the flat motor.

Portable abrasive tool

An adapter includes an insertion part that is inserted into a body of a power tool and has terminals for electrically connecting with the power tool; a pair of rails for guiding insertion of a battery pack in a direction substantially orthogonal to the insertion direction of the insertion part; an operating part constituting tool-latching device for attaching to and detaching from the body of the power tool; and a receiving part constituting battery-latching device for attaching to and detaching from the battery pack. The operating part of the tool-latching device and the receiving-side of the battery-latching device are disposed in different positions when viewing the adapter in the insertion direction of the insertion part.

Adapter for a power tool battery pack

A portable electric cutting apparatus includes a housing for housing an electric motor rotating a saw blade, a saw cover attached to the housing, the saw cover having a shape to cover an upper half of an outer periphery, the saw cover including a saw blade housing portion at least partially housing the saw blade and a cylindrical portion having a substantially cylindrical shape, the cylindrical portion connecting to the housing at an end face of the cylindrical portion a base being joined to at least one of the saw cover and the housing, the base having an opening to allow the saw blade to project downwardly from a bottom face which is slidable on a cut material and a fan being driven by the electric motor, wherein a discharge passage forming member is provided with the saw cover so as to form a discharge passage by cooperating with a wall face of the saw cover.

Portable electric cutting apparatus

A portable electric cutting apparatus includes a housing for housing an electric motor for rotating a saw blade a fan provided in the housing and driven by the electric motor, a saw cover attached to the housing and having a saw blade housing part having a shape to cover an upper half of the outer periphery of the saw blade for housing a part of the saw blade, a base formed with an opening for allowing the saw blade to project downward from a bottom face which is slidable on a cut material. A discharge passage for discharging a fan wind produced by driving the fan is formed along an outer periphery of the saw cover. The fan wind is discharged through the discharge passage toward a front side of the base in the cutting direction.

Growing community of inventors

Ibaraki, Japan

Takuya Konnai