Hitachi Koki Co., Ltd.

Koki Holdings Co., Ltd.

Koki Holdings Kabushiki Kaisha

Seiichi Kodato

Kenichi Matsunaga

Tomoyoshi Yokota

Tomomasa Nishikawa

Hiroki Kitagawa

Mizuho Nakamura

Kouji Sagawa

Masahiro Miura

Yoshimi Takahashi

Masato Sakai

Masanori Okada

Takashi Ueda

Shinichi Kakefuda

Shingo Kosugi

Naoto Ichihashi

Toshinori Yasutomi

Shingo Yamazaki

Hideaki Hasegawa

Hiroshi Haga

Kazuhiro Segawa

Yoshihiko Watanabe

Toshiaki Takagi

Naoki Matsunaga

Jun Enta

A fastener driving machine provided with a mechanism to lubricate pins or racks is realized. A fastener driving machine includes a driver blade, pins, and a lubricant feeding mechanism. The driver blade can reciprocate in a first direction and a second direction opposite to each other, and hits a fastener when the driver blade moves in the first direction. The pins respectively engage with racks provided on the driver blade to move the driver blade in the second direction. The lubricant feeding mechanism supplies lubricant to the racks and the pins.

Fastener driving machine

To provide a portable blower having excellent battery heat radiating properties. A battery mounting portion projects convexly into an air passage. Outer surfaces of a bottom surface section and side surface sections of the battery mounting portion form part of an inner surface of the air passage. The battery mounting portion holds a battery pack at an attitude that a center of gravity of the battery pack is as close to a handle portion as possible. Specifically, the battery mounting portion holds the battery pack in such a manner that the greatest surface of the battery pack having a substantially cubic shape faces the handle portion. The battery mounting portion holds the battery pack in such a manner that a longitudinal direction of the battery pack faces the air passage.

Portable blower

A brushless motor is incorporated in one of divided constituent members of a motor casing which is disassembled, and then, the divided constituent members of the motor casing which is disassembled are connected to each other into the motor casing assembled with mgachine screws screwed into machine screw holes. As this occurs, when a wiring of the brushless motor is held by a first stationary blade portion and a second stationary blade portion, the wiring is allowed to lead to an outside of an outer cylindrical portion through a gap defined between the first stationary blade portion and the second stationary blade portion.

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 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.

Portable electric hammer drill

Growing community of inventors

Ibaraki, Japan

Seiichi Kodato