Hitachi Koki Co., Ltd.

Koki Holdings Co., Ltd.

Kenichi Matsunaga

Shigeharu Ushiwata

Hideaki Terashima

Ryuichi Imamura

Shinji Takano

Tomoyoshi Yokota

Seiichi Kodato

Hiroki Kitagawa

Shingo Kosugi

Masahiro Miura

Masanori Okada

Yoshimi Takahashi

Shinichi Kakefuda

Yoshikazu Kawano

Rui Akiba

Naoto Ichihashi

Kazuhiro Segawa

Toshihiko Hayashizaki

Keisuke Maeda

Masahide Imayoshi

Naoto Ise

A cutting toolcomprises a housing, and a handleconnected to the housing. The handlecomprises: a grip part; a first connection partextending from one end of the grip parttoward a front side and fixed to a main body housingof the housing; and a second connection partextending from the other end of the grip parttoward the front side and fixed to the main body housing. Thus, a loop structure S is formed by the housingand the handle. Then, a battery packto be attached to a battery attachment and detachment partof a motor housingis disposed in the loop structure S.

Work machine

An object of the present invention is to provide an electric power tool capable of automatically changing the rotating speed of an electric motor in accordance with operation conditions. The electric power toolwhich carries out an operation of polishing, peel-off, cutting, or the like by swinging a tip toolattached to a tool retainingpart within the range of predetermined angles by the drive power of the electric motor, wherein the electric power tool has a control device configured to indirectly detect the load of the tip tool from a current value, and to control the rotating speed of the electric motorto a maximum rotating speed and a minimum rotating speed on the basis of the load of the tip tool

Electric power tool

An air compressor comprising: a tank (), a compression mechanism (), a motor () and a control circuit (). The control circuit () includes a CPU () and a storing unit () which stores a control program, the compressor operation history and a plurality of operation modes. Each of the operation modes is defined by two setting values: a reference restart pressure value and a motor rotational speed value, at least one of these values being different from among the plurality of modes. The control circuit () executes one of the plurality of modes as a target mode in which the control unit controls the motor to restart by comparing the pressure in the tank with the reference restart pressure and rotates the motor at the rotational speed of the target mode. The control circuit changes the target mode from the one of the plurality of modes to another one of the plurality of modes based on the compressor operation history.

Air compressor

An air compressor includes a compression unit, a drive unit, a tank unit, and a control circuit unit. The compression unit is configured to generate a compressed air and provided with a handle positioned above a center of gravity of the air compressor. The drive unit is configured to drive the compression unit. The tank unit is disposed below the compression unit and includes a plurality of air tanks configured to reserve the compressed air. The compressed air reserved in the tank unit has a pressure value. The control circuit unit is configured to detect the pressure value of the compressed air reserved in the tank unit and to control the drive unit to drive the compression unit.

An air compressor includes a motor, an air compression mechanism driven by the motor, a rotation shaft rotatable integrally with a rotor of the motor, a fan rotatable integrally with the rotation shaft, a plurality of air tanks for reserving compressed air generated by the air compression mechanism, and a control unit for controlling the motor. The plurality of air tanks are juxtaposed with each other and arrayed in an array direction. The plurality of air tanks includes an endmost air tank and an adjacent air tank adjacent to the endmost air tank. The control unit is disposed adjacent to and opposite to the adjacent air tank relative to the endmost air tank. The control unit is disposed adjacent to and in confrontation with an outer circumference of the fan.

According to the invention, an air compressor includes: one pair of air tanks arranged parallel to each other by being separated from each other in a constant interval, for storing thereinto compressed air; a compressing unit that compresses air sucked from an external space so as to supply the compressed air to the air tanks; and a motor coupled to the compressing unit so as to drive the compressing unit, while the motor and the compressing unit are arranged above the one pair of air tanks; wherein: a cooling fan that generates cooling wind is provided on one end of a rotation shaft of the motor; and a control circuit unit that drives the motor is arranged above the one pair of air tanks and at a position which is overlapped with an axial direction projection area of the cooling fan.

When an air pressure in a tank part () drops from a maximum set pressure value (A) to or below at least one restart set pressure value defined to lie in a range between the maximum set pressure value and a minimum set pressure value, a control circuit part () operates an electric motor () at a predetermined revolving speed. When the air pressure in the tank part () drops from the restart set pressure value to or below the minimum set pressure value, the control circuit part () operates the electric motor () at the predetermined revolving speed or a revolving speed lower than Nuntil the air pressure in the tank part () reaches the maximum set pressure value.

A cutter including a base, a holder, a cutter blade portion, and a laser generator. The holder is supported on the base portion in an upright posture. The cutter blade portion supports a moving blade. The cutter blade portion is supported on the holder movable between an upper position and a lower position. The cutter blade portion is moved into the lower position to cut a workpiece supported on the base using the moving blade. The laser generator is attached to the holder or the cutter blade portion in an orientation to direct at least a portion of the laser light onto a position on the workpiece that is directly beneath the cutter blade portion when the cutter blade portion is in the upper position.

Cutter with laser generator that irradiates cutting position on workpiece to facilitate alignment of blade with cutting position

A cutter including a base, a holder, a cutter blade portion, and a laser generator. The holder is supported on the base portion in an upright posture. The cutter blade portion supports a moving blade. The cutter blade portion is supported on the holder movable between an upper position and a lower position. The cutter blade portion is moved into the lower position to cut a workpiece supported on the base using the moving blade. The laser generator is attached to the holder or the cutter blade portion in an orientation to direct at least a portion of the laser light onto a position on the workpiece that is directly beneath the cutter blade portion when the cutter blade portion is in the upper position. Alternatively, a holder has a shaft support portion, and a slide shaft is axially slidably supported by the shaft support portion. A front end of the slide shaft has a hinge holder which pivotally supports the cutting blade portion. A laser generator is fixed to a front side of the hinge holder.

A miter saw includes a base unit, a cutting unit having a rotary cutting blade, a motor for driving the rotary cutting blade, and a housing having a blade cover for covering a part of the cutting blade and a motor housing connected to the blade cover, a supporting unit supported to the base unit for pivotably supporting the cutting unit, the supporting unit being configured to move the cutting unit toward and away from the base unit in a first direction, the supporting unit including a guide unit supported with respect to the base unit, and a sliding unit having a pivot shaft pivotably supporting the cutting unit, the sliding unit being slidable on the guide unit to move between a front position and a rear position in the second direction and the pivot shaft extending in a third direction which is perpendicular to the first and second directions.

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Hitachinaka, Japan

Kenichi Matsunaga