Thk Co., Ltd.

Gree, Inc.

Bridgestone Corporation

Eco-pork Co., Ltd.

Kentaro Nishimura

Akimasa Yoshida

Hiroyuki Arai

Satoshi Fujita

Soshi Miyahara

Takashi Sakuyama

Satoru Nagai

Tetsuya Miura

Masakazu Uesugi

Yusuke Todoroki

Hidekazu Michioka

Hiroshi Niwa

Masahiko Yoshino

Takahiro Mochizuki

Tsutomu Togashi

Akihiro Teramachi

Makoto Iizumi

Futoshi Oki

Toshiyuki Mukaiyama

Lina Teng

A method for providing a game in which a plurality of missions is presented to a user device each time a certain period has elapsed from a server having a storage unit for storing user information relating to a plurality of users, includes the steps of generating a plurality of different missions for each of the plurality of users based on the user information stored in the storage unit, presenting a list of the generated missions for each of the users on the user device, and presenting an operational element for updating a mission included in the presented list to another mission regardless of the elapse of the period in accordance with the progress of presented missions.

Method for providing a game, recording medium and server

The rotary table device includes a base, a motor, a rotary drive shaft and a cross-roller bearing. An outer ring is rotationally driven through engagement of a pinion gear formed at a shaft end of the rotary rive shaft with a rack gear formed on the outer ring and transmission of a rotary drive force from the rotary drive shaft to the outer ring. The outer ring is formed in a hollow cylindrical shape covering a side of an inner ring, includes a table capable of mounting an external member on one side of the hollow cylindrical shape, and is integrated with the rack gear formed over an entire circumference of the other side thereof. With such a configuration, a rotary table device that can realize reduction in height, size and weight can be provided.

Rotary table device

There is provided a roller screw in which a twisted amount of an unloaded return path is reduced. The roller screw has a screw shafthaving a spiral roller-rolling surfaceon an outer peripheral surface thereof; a nuthaving a spiral loaded roller-rolling surfaceon an inner peripheral surface thereof, the spiral loaded roller-rolling surface being opposed to the roller-rolling surfaceof the screw shaft; a circulation memberarranged in the nutand formed to have an unloaded return pathconnecting one end and the other end of the loaded roller-rolling surface, whose turn number is less than one, of the nut; and a plurality of rollersarranged in a one-turn roller circulation path composed by a loaded roller-rolling pathand the unloaded return path. The circulation memberguides the rollers which have moved and arrived at the one end of the loaded roller-rolling pathhaving less than one turn, to the unloaded return path, and then returns the rollers to the other end of the loaded roller-rolling pathhaving less than one turn. The number of turns of the loaded roller-rolling pathis set to be less than one turn, whereby the rollerswhich have arrived at one end of the loaded roller-rolling pathcan be transferred to the other end of the loaded roller-rolling pathwithout changing their attitudes.

Roller screw and method of circulating rollers in roller screw

Provided is a roller screw capable of preventing rollers moving from an unloaded return path to a loaded roller rolling path from coming into collision with a scooping portion. The roller screw has: a screw shafthaving a spiral roller rolling surfaceformed on an outer peripheral surface thereof; a nuthaving a loaded roller rolling surfaceformed in an inner peripheral surface thereof; a circulation memberhaving an unloaded return path connecting one end of the loaded roller rolling surfaceof the nutto an opposite end thereof; and a plurality of rollersarranged in a loaded roller rolling pathand the unloaded return path. In the circulation member, as a scooping portion that juts toward the screw shaftand provided for scooping the rollersmoving in the loaded roller rolling pathup into the unloaded return path, a pair of diagonal corresponding partsis provided which are in contact with diagonal partsof a rectangular side surface of each rollerand a width between which is gradually narrower as they are deeper in the unloaded return path in such a manner that a cross section of the unloaded return path is closer to a rectangle.

Roller screw

Tread portion of an automobile tire

A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide device comprises a track member () on which a roller rolling part () is formed which allows rollers () to roll on along the roller rolling part; a moving member () on which a loaded roller rolling part () facing the roller rolling part () is formed; a plurality of rollers () arranged on a roller circulation path containing a loaded roller rolling path () formed between the roller rolling part () of the track member () and the roller rolling part () of the moving member (); and a plurality of retainers () respectively interposed between rollers of the plurality of rollers (). The plurality of retainers () are mutually separated, each of the retainers () which is divided into a first divided member () contacting one roller of a pair of rollers () with each retainer () sandwiched therebetween and a second divided member () contacting the other roller () of the pair of rollers, and the first divided member () is allowed to rotate relative to the second divided member ().

Motion guide device

The present invention provides a screw device which takes a heavy load in one direction along the axis of the screw shaft and only a light load in the opposite direction, the screw device capable of providing ease of control of preloading. The screw device of the present invention has a screw shaftwith an outer surface having a ball rolling groovefor rolling ballsand a roller rolling groovefor rolling rollersboth spirally formed thereon; a ball nutwith an inner surface having a ball rolling groovespirally formed thereon facing the ball rolling grooveof the screw shaft; a roller nutwith an inner surface having a roller rolling groovespirally formed thereon facing the roller rolling grooveof the screw shaft; a plurality of ballsarranged between the screw shaftand the ball nut; and a plurality of rollersarranged between the screw shaftand the roller nut. The ball nutand the roller nutare connected along an axis of the screw shaft

Screw device and method of manufacturing the same

There is provided a roller screw comprising a screw shafthaving an outer peripheral surface in which a spiral roller rolling grooveis formed, a nut memberhaving an inner peripheral surface in which a spiral loaded roller rolling grooveis formed so as to oppose to the roller rolling groove of the screw shaft, a return pipein which a roller return passageis formed so as to connect one and another ends of a loaded roller rolling passagebetween the roller rolling grooveof the screw shaftand the loaded roller rolling grooveof the nut member, a number of rollersdisposed in the loaded roller rolling passageand the roller return passage, wherein the roller return passageis twisted so that an attitude of the rollerchanges as the roller moves in an axial direction of the return pipe. Such roller screw enables to provide an easy assembling and compact structure and to realize smooth circulation of the roller.

Ball screw apparatus

Growing community of inventors

Tokyo, Japan

Kentaro Nishimura