Hitachi Koki Co., Ltd.

Masao Hamada

Akira Oono

Kaoru Ichikawa

Sueji Tachihara

Hiroshi Okazaki

Toshiaki Kishino

A wrenching portion provided in an adjuster and employed for assembling is formed at a gripping portion for rotation. The gripping portion is formed in a polygonal shape. In this configuration, the adjuster is decreased in size and weight and its operability of adjusting a driving depth is improved. An undercut portion is removed in a vertical direction and a non-slip rugged portion is provided in only a longitudinal direction so that it can be manufactured in a simple tow-part mold, thereby reducing the production cost.

Nailer

A box nailing machine includes: a box nailing machine body having a nail driving port from which nails are driven; a handle portion having a handle arm; and a magazine for accommodating nails in it, the forward end portion of which is attached to the nail driving port, the portion of the magazine except for the forward end portion being attached to the handle portion via the handle arm. The magazine has a handle arm attaching portion for attaching the magazine to the handle arm. The magazine is made of metal and formed substantially U-shape by press forming. A washer is integrally formed in the handle arm attaching portion so that the washer is disposed between a head portion of a fixing bolt and the magazine.

Box nailing machine

A nailing machine comprises a machine body including a driving unit for driving a nail, a handle having an inner hollow portion formed as an accumulation chamber, the handle having one end mounted to the driving unit and another end to which a compressed air inlet port is formed, a filter disposed inside the accumulation chamber of the handle, and a nose portion mounted to the driving unit through which the nail is driven. The compressed air inlet port has an opening area smaller than a cross sectional area of an inner periphery of the handle, and the filter element is disposed in close contact to the compressed air inlet port.

Nailing machine

The inner surface of a nozzle of a nail driver has a taper in the driving direction near the output nozzle thereof to direct a tip of the nail toward an axis of the nozzle when the tip of the nail contacts with the taper to always drive the nail into a board perpendicularly.

Nail driver

A pneumatic fastener driving tool having a cover member which covers an exhaust port of a body portion. The body portion has a top wall, and a cover member is engagingly fixed to an upper portion of the body portion. The cover member and the upper portion of the body portion define an exhaust air passage, and the cover member has an exhaust opening in communication with the exhaust passage. The cover member is formed of an elastic material and has a top wall where a through hole is formed. Normally, a lower surface of the cover member is in surface contact with an upper surface of the top wall of the body portion. If the cover member is thermally deformed, the lower surface of the cover member is separated from the upper surface of the top wall of the body portion, and exhaust air may be leaked into the space. The leaked exhaust air is discharged outside through the through hole.

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Ibaraki, Japan

Masao Hamada