Thk Co., Ltd.

Mitutoyo Corporation

Mitsubishi Steel Mfg. Co., Ltd.

Takenaka Corporation

Kureha Gosen Co., Ltd

Ghk Co., Ltd.

Hidekazu Michioka

Katsuya Iida

Hiroaki Mochizuki

Tomozumi Murata

Hiroshi Niwa

Tadashi Hirokawa

Takeki Shirai

Masashi Konomoto

Tetsuhiro Nishide

Mitsuaki Honma

Daisuke Yatsushiro

Masahiro Yoshihashi

Kaoru Hoshide

Masahiko Yoshino

Yoshiaki Saito

Akimasa Yoshida

Akihiro Teramachi

Minoru Kouchi

Tomoyuki Aida

Makoto Iizumi

Yasuyuki Abe

Hiroshi Takamatsu

Yoshiaki Saitoh

Yoshiyuki Honjyo

Kazuki Tomita

Akira Tochigi

Yuji Kokuno

Seiichi Ohira

Nobuyuki Masumura

Yoshinobu Tanaka

Tsuyoshi Yamamoto

Takashi Matsumoto

Kentaro Yamamoto

Toshiyuki Aso

Satoshi Fujita

Takahiro Kawaguchi

Takuya Horie

Yasuhiro Matsumoto

Kentaro Nishimura

Yoshihiro Kimura

Takashi Sakuyama

Mitsuru Fukuda

Hiroshi Kaneshige

Satoru Nagai

Seiichi Otsubo

Ryuji Takeda

Toshio Omi

Hiroshi Kurabayashi

Toshiaki Kadono

Yoshihito Watanabe

Shigeru Ebina

Kunihisa Takahashi

Daisuke Yaguchi

Nobuyoshi Murai

Fumiaki Morita

Katsuhiro Suda

Takuya Yamagata

Hironori Shoji

Hiroshi Nakabayashi

Takashi Sakae

Kenji Takahashi

Takasi Hatanaka

Masashi Yamamoto

Yoshihide Uchiyama

Yuji Sano

Hirokazu Yoshioka

Mitsuaki Homma

Haruo Kusakabe

Masayuki Ishizaka

Takao Nojiri

Naoki Hikosaka

Masayuki Imamura

Takeomi Kawakami

Junichi Kuwabara

Mitsuhiro Teramachi

Hiroaki Kishi

Genjirou Ise

Yoshiaki Saitou

Yasuhide Katsumata

A tape-shaped product and a belt for a ball chain are provided. A tape-shaped product of synthetic resin includes a tape of a thermoplastic resin, and a preliminarily stretched fibrous member of a thermoplastic resin contained therein along longitudinally parallel edges or in proximity thereto of the tape. A belt for a ball chain, includes a tape-shaped product of synthetic resin formed by injection molding, together with a fibrous member as an insert of a resin of the same kind as that of the fibrous member so that the fibrous member is disposed along the longitudinal edges or in proximity thereto, ball-insetting holes are disposed at equal intervals, and ball-retaining projections are disposed around the holes.

Tape-shaped molding and belt for ball chain

Provided is a method of manufacturing a spherical bearing having an inside member with a metal ball portion and an outside member having a ball support portion enclosing and supporting the ball portion of the inside member and connected to the inside member swingably or rotatably relative to each other, including the steps of performing injection molding in which the ball portion of the inside member is inserted as a core in a mold to mold a resin liner covering the ball portion, molding the outside member covering the resin liner by a casting in which the ball portion and the resin liner are inserted as a core in the mold, and after the completion of the casting, heating the resin liner covering the ball portion through the ball portion of the inside member.

Method of manufacturing a spherical bearing

The present invention provides a screw device enabling insulation of sounds occurring from the inside of the screw device when circulating rolling elements. The screw device includes: a screw shafthaving a spiral rolling-element rolling grooveon an outer circumferential surface; a nut bodyhaving a spiral loaded rolling-element rolling grooveon an inner circumferential surface to oppose the rolling-element rolling grooveof the screw shaftand having therein a rolling-element returning passageto return rolling elementsrolling in a loaded rolling-element rolling passageformed between the loaded rolling-element rolling grooveand the rolling-element rolling grooveof the screw shaft; a circulation memberattached to an end face of the nut bodyand provided with a direction changing passageto connect the loaded rolling-element rolling passageand the rolling-element returning passage; and a sound insulating memberattached to the nut bodyto which the circulation memberis attached and formed to have an inner circumferential surface coming into contact with the screw shaft and to cover the circulation member

Screw device with sound insulating member

A motion guide device is able to damp a moving block from vibrating in a direction perpendicular to an axis of a raceway rail. A damping plate with a surface facing a surface of a raceway is provided at a moving block body. The surface of the damping plate is set to be in contact with the raceway rail or is set such that a gap between its surface of the raceway rail is as close to zero as possible. When vibration occurs from the raceway rail or the moving block, the surface of the raceway rail and the surface of the damping plate come into contact with each other. This brings about change in a spring constant of the motion guide device in the direction perpendicular to the axis of the raceway.

Motion guide device and method of assembling motion guide device

A roller screw is provided having a structure suitable for circulating rollers. The roller screw has a screw shaftwith a spiral roller rolling grooveformed on an outer peripheral surface thereof; a nutwith a spiral roller rolling grooveopposed to the roller rolling groove of the screw shaft and formed on an inner peripheral surface thereof; and a plurality of rollersarranged in a load roller rolling pathbetween the roller rolling grooveof the screw shaftand the roller rolling grooveof the nut. Inside the nutis provided a roller return pathextending linearly in parallel with an axis line of the nut. To opposite end faces in an axis line direction of the nutare attached direction change path forming membersin which direction change pathsto connect the load roller rolling pathand the roller return pathare formed. The roller return pathis twisted to rotate an attitude of each of the rollerswhile the rollersmove in the roller return path

Roller screw

Provided is a motion guide device having a low rigidity in the vertical direction and a low rigidity in the horizontal direction. The motion guide device has: a raceway railhaving a bottom surface, side surfacesand an upper surfaceand being mounted on one of a baseand a moving body; and a moving blockhaving a center portionfacing the upper surfaceof the raceway railand side wall portionsfacing the side surfacesof the raceway railand being mounted linearly or curvilinearly movable relative to the raceway rail. On a side surface of the moving block, a displacement absorbing mechanismis provided. The displacement absorbing mechanismhas a mounting membermounted on an opposite one of the baseand the moving body, and a displacement absorbing portionwhich is fixed to the mounting memberand which is shear-deformed when the mounting memberis displaced in a direction crossing an upper surface of the moving block

Motion guide device, relative motion system and displacement absorbing mechanism

A motion guide device that has a novel damping structure different from the conventional damping structure is provided. The present invention comprises a raceway member () having a rolling-element rolling part (); a moving member () having a loaded rolling-element rolling part () facing the rolling-element rolling part () and being allowed to make a linear or curved movement relatively to the raceway member (); and a plurality of rolling elements () intervening between the rolling-element rolling part () of the raceway member () and the loaded rolling-element rolling part () of the moving part (). A gap () between the raceway member () and the moving member () is filled with a layer of oil contacting the raceway member () and the moving member (). Viscosity resistance of the oil is utilized to apply a braking force to the moving member () or the raceway member () in proportion to a speed.

Motion guide device, table apparatus, and damping method for motion guide device

Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to a stroke direction. The micro actuator includes: a spline shaft formed as a cylinder with a hollow part and having an axially extending slit opening; a spline nut fit-engaged with the spline shaft and axially guiding the spline shaft; a pair of end caps fixed to openings at both ends of the spline shaft; a magnet rod supported at both ends within the hollow part of the spline shaft by the end caps; and a forcer loosely fit-engaged with a periphery of the magnet rod within the hollow part of the spline shaft to constitute a linear motor together with the magnet rod and connected with the spline nut through the slit opening.

Micro actuator

A motion guide device is provided, which is able to not only lubricate rolling-element rolling surfaces with the use of a technique totally different from conventional lubricating techniques but also maintain a lubricating capability over a long period of time. The motion guide device for use in the vacuum environment a track member () having a rolling-element rolling part (), a moving member () having a rolling-element circulation passage containing a loaded rolling-element rolling part () facing the rolling-element rolling part () and being movable relatively to the track member (), a plurality of rolling elements () placed in along the rolling-element circulation passage, and a lubricant storing member storing lubricant, which member is attached to the moving member () without contacting the track member (). The lubricant storing member is exposed in a space formed between the track member () and the moving member. The vaporized lubricant reaches the rolling-element rolling part (), loaded rolling-element rolling part (), and rolling elements (), so that these parts and elements can be lubricated.

Motion guide device and method of lubricating the same

Provided is a screw device capable of reducing noise generated therefrom. The screw device has a screw shafthaving a rolling-element rolling groovespirally formed on an outer peripheral surface of the screw shaft; a nuthaving a loaded rolling-element rolling groovespirally formed on an inner peripheral surface of the nut and facing the rolling-element rolling grooveof the screw shaftand a rolling-element return path connecting an end of the loaded rolling-element rolling groovewith an other end thereof; and a plurality of rolling elementsarranged in a rolling-element circulation path. A low-noise plateis mounted on a flangeprovided at an axial end of the nutso that the low-noise platecovers at least a part of an end surface of the flange

Low-noise screw device

A movement guiding device for a vacuum environment is provided so that the device is able to suppress a base oil vaporized in the vacuum environment from leaking to the outside. The movement guiding device for a vacuum environment according to the present invention comprises a track member () having a rolling-element rolling part (), a moving member () having a rolling-element circulation passage containing a loaded rolling-element rolling part () facing the rolling-element rolling part () and being movable relatively to the track member (), a plurality of rolling elements () arranged in the rolling-element circulation passage, clearance seals () arranged with the moving member () and sealing a clearance formed between the track member () and the moving member () without coming in contact with the track member ().

Movement guiding device for vacuum environment

A motion guide device having a novel scoop section structure whose scoop section is not likely to break even if a movement member is moved at high speed. A scoop section () of a movement block () scoops balls () that roll in a ball rolling groove () of a raceway rail () and introduces them into no-load ball return paths (). The scoop section () is formed in a Gothic arch groove shape in which the scoop section () is in two-point contact with a ball (). In a cross-section orthogonal to the advance direction of the balls (), an angle (contact angle &#x3b1;) formed by a line Lthat connects a point P at which the scoop section () and a ball () are in contact and the center C of the ball () and a line Lthat connects the center of the ball () and a bottom () of the Gothic arch groove-shaped scoop section () exceeds 30 degrees and is not more than an angle &#x3b3; formed by a line Lthat connects the center C of the ball () rolling in the ball rolling groove () of the raceway rail () and an edge () of the ball rolling groove () of the raceway rail () and the line Lthat connects the center C of the ball () and the bottom of the ball rolling groove ().

Motion guide device

A roller screw of the present invention has a screw shafthaving a roller rolling surfacespirally formed with a lead on an outer surface thereof; a nuthaving a roller rolling surfacespirally formed on an inner surface thereof to face the roller rolling surfaceof the screw shaft; and a plurality of rollersarranged in a rolling pathbetween the roller rolling surfaceof the screw shaftand the roller rolling surfaceof the nutand moving around the screw shaft while rotating on rotation axes of the rollers. In this roller screw, each of the rotation axesof the rollerssubstantially crosses a center lineof the screw shaft. Since each of the rotation axesof the rollerscrosses the center lineof the screw shaft(in other words, the rollersarranged in the rolling pathare not skewed from the beginning) even when the rolling pathhas the lead, the rollerare allowed to move smoothly.

A guide table device is provided with a lower-side plateprovided with a pair of rolling member rolling groovesformed in a first (X) direction, an upper-side plateprovided with a pair of rolling member rolling groovesformed in a second (Y) direction, an intermediate memberhaving rectangular configuration provided with four side portions to which four rolling member rolling groovesare formed so as to be opposed to a pair of rolling member rolling grooves of the lower-side plate and a pair of rolling member rolling grooves of the upper-side plate, and a plurality of ballsdisposed to be rollable between four rolling member rolling passages formed by the lower-side plate, the upper-side plate and the intermediate member. The four rolling member rolling groovesformed to the four side portions of the intermediate memberare formed on the same plane.

Guide table device

Growing community of inventors

Tokyo, Japan

Hidekazu Michioka