Hitachi, Ltd.

Hitachi Construction Machinery Co., Ltd.

Hitachi Metals, Ltd.

Takeji Shiokawa

Kuninori Imai

Mitsuya Mikawa

Chikakazu Ninomiya

Mitsuo Miyamoto

Isao Ishikawa

Shigeo Kato

Shinji Tanaka

Kazuo Sato

Hiroshi Kanda

Hideaki Sasaki

Shinichi Kazui

Morio Tamura

Hisayoshi Hashimoto

Kazuyoshi Hatano

Kiyoshi Tanaka

Harumasa Onozato

Fujio Sato

Toshimitsu Nakagawa

Ken Ichiryuu

Takao Kawanuma

Kenji Morita

Hiroyuki Doi

Teruo Umehara

Makoto Matsuoka

Yutaka Hashimoto

Mitsukiyo Tani

Keiji Fujikawa

Toshimichi Ikeda

Seiki Takedomi

Hiroyuki Ogino

Kan Otake

Toshihiro Mine

A fastener structure for fastening a first member and a second member using a taper implant having a threaded hole therein. The taper implant has a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a threaded hole passing therethrough. The first member has a wall portion with a tapered hole extending therethrough and a counterbored portion adjacent a larger diameter end to receive the projection portion of the taper implant. The taper implant is inserted into the hole of the first member and held therein by frictional contact. The second member has a wall portion with a hole therethrough. The second member is positioned in contact with the first member and the two members are fastened together by inserting a male screw through the hole of the second member and threading the male screw into engagement with the threaded hole of the taper implant.

Fastening structure using a taper implant

A method of fastening a first member and a second member using a taper implant having a threaded hole therein includes providing a taper implant having a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a threaded hole passing therethrough and providing a first member having a wall portion with a tapered hole extending therethrough and having a counterbored portion adjacent a larger diameter end to receive the projection portion of the taper implant. The taper implant is inserted into the hole of the first member and held therein by frictional contact. A second member is provided having a wall portion with a hole therethrough. The second member is positioned in contact with the first member and the two members are fastened together by inserting a male screw through the hole of the second member and threading the male screw into engagement with the threaded hole of the taper implant.

Taper implant and a screw-fastening structure using a taper implant with female threads

A method of fixing a taper implant to a receiving member includes providing a taper implant having a frusto-conical outer surface, a projecting portion connected to a larger diameter end and a smaller diameter end. A receiving member is provided which has a wall portion with a passing-through hole therein with at least a portion of the passing-through hole being tapered to form a frusto-conical shape whereby the taper portion has a larger diameter end and a smaller diameter end and the passing through hole has a cylindrical counterbored portion adjacent to the larger diameter end in which the projecting portion of the taper implant is received. A taper rate of the taper portion of the passing through hole is the same as a taper rate of the taper portion of the taper implant. The larger diameter end of the taper portion of the passing through hole has a diameter which is smaller than a diameter of the larger end of the taper portion of the taper implant whereby there is a tight-fit allowance when the taper implant is inserted into the passing through hole. The taper implant is fixed in the passing through hole of the receiving member by the outer surface of the taper portion of the taper implant being in contact with a surface of the taper portion of the passing through hole by applying a force to the taper implant whereby a friction force is generated between the taper portion of the taper implant and the wall portion.

Method for fixing a taper implant to a receiving member

A member coupling device is provided for use with a treatment apparatus which uses chemicals. The member coupling device is formed with a tapered hole including a tapered hole portion which diverges toward an opening. A tapered implant is inserted into the tapered hole from an enlarged side of the tapered hole portion and fitted therein. The implant includes a tapered portion in contact with the tapered hole portion, and a first thread formed on the tapered portion. With the implant fitted in the tapered hole, a member is placed in contact with the member coupling device. A second thread formed on a fastening member is engaged with the first thread of the implant in a screw coupling configuration to mount the member on the member coupling device.

Apparatus for installing a material which is processed by using chemicals

A taper implant includes a taper portion having an outer surface frust-conical in shape. A flange portion is formed at an outermost end of the taper portion on the larger-diameter side to project outwardly with respect to the taper portion and having a flat surface situated perpendicularly to the axial direction of the taper portion, and female threads serving as a fit portion extending in the axial direction of the taper portion. A hole taper portion and a hole step portion are drilled at the same time to bore a hole in one of the members to be fastened, and the taper implant is driven into the hole, thereby providing a screw fastening structure for the fastened members.

A present invention provides a locking mechanism capable of preventing a bolt from loosening. A bolt has a head provided with a first part which comprises openings . A locking washer is provided with a second part which includes outer projections and a third part which includes insertion projections on an outer edge. A taper piece has a portion provided with a fourth part which comprises openings . The first part and the second part can engage with each other and the third part and the fourth part can engage with each other when said bolt fastens at least two members and trough said washer and said taper piece . Accordingly, the bolt is prevented from rotating in an loosening direction.

Bolt and a nut locking mechanism

A depositing apparatus includes a profile-following mechanism having a translational displacement mechanism portion and a rotation mechanism portion adapted to allow a head to be swung in the directions of both X and the Y axes so that the head follows a profile of the surface of workpiece smoothly around a first contact point, thereof with the workpiece, serving as a fulcrum point.

Deposition apparatus and profile-following device suitable for

A drilling method and a drilling apparatus of a hard brittle material in which a core drill is used for abrasive grinding of high accuracy and high durability. Therefore, the structure of this invention comprises: a tubular core drill; a collet chuck for holding the core drill, including a chuck main body of an integral shape which is hollow, a seal joint provided on the chuck at the inlet side of the lubricant, a slit portion of a pin vise type for holding the core drill, which slit portion is provided on the chuck at the outlet side of the lubricant, and a seal portion provided axially inside of the slit portion, which seal portion has an inner diameter substantially equal to an outer diameter of the core drill applied to the seal portion, and a threaded portion formed on the outer periphery of a portion further axially inside of the seal portion, so that after inserting the core drill into the seal portion, a fastening nut is engaged with and tightened on the threaded portion to thereby seal and fix the core drill, and that the lubricant at a high pressure can be supplied into a central space of the core drill; and a structure for delivering the lubricant through the inner passage of the core drill.

Drilling apparatus of hard brittle material and method thereof

A balance adjustment method of an end mill for increasing the accuracy of the machined surface and also for lengthening the tool lifetime, in which mass unbalance between an end gash part of a primary cutting edge and an end gash part of a secondary cutting edge of the end mill having asymmetric cutting parts is balanced by decreasing an end gash angle, an end gash part, a clearance angle or a corner of tooth face of the secondary cutting edge.

Balance adjustment method of end mill

A linear motor comprising a center yoke made of a ferromagnetic material; outer yokes made of a ferromagnetic material, having permanent magnets, each having magnetic poles on the inner and outer surfaces thereof and fixed to the inner surface of the outer yokes, and disposed outside the center yoke with both ends thereof being magnetically coupled; and a movable member having coils wound on the outer circumference thereof and axially movably disposed in a gap between the center yoke and the outer yokes, in which recesses are provided on the opposing surfaces of the center yoke and the movable member, and a static-pressure gas bearing is formed by providing an air intake vent connecting to these recesses.

Linear motor

An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.

Ultrasonic probe

Ultrasonic probe and manufacture method for same

A slide table includes an inner member, an outer member fitted at least partly over the inner member, air bearings provided between the inner and outer members, and a motor means having a coil connected to the outer member to drive the same.

Slide table

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Kanagawa-ken, Japan

Takeji Shiokawa