Tohnichi Mfg. Co., Ltd.

Kabushiki Kaisha Toshiba

Bridgestone Corporation

Sony Corporation

Nippon Steel Sumitomo Metal Corporation

Toshiba Infrastructure Systems & Solutions Corporation

Shibaura Institute of Technology

Seiji Ito

Tomohiro Ogata

Hiroyuki Kobayashi

Kyoichi Komatsu

Hiroshi Tsuji

Tsuyoshi Hasegawa

Tomonori Ezoe

Osamu Tsuji

Kaoru Koiwa

Takeshi Yasuda

Tomomi Kageyama

Hideaki Nishio

Toru Tsuda

Takaya Ogawa

Shigeru Uchida

Tsuyoshi Inoue

Hiroaki Asai

Shinya Aikawa

Keitaro Hino

Naoya Masuda

Takeo Hara

Shinji Hashimura

Tadashi Fujisawa

Provided is a nut and a bolt tightening method for fastening an object, wherein a tightening force is applied on the object by rotating a nut or a bolt in a state in which a predetermined tension force is applied on the bolt in the axial direction of the bolt. When the tensile force exerted on the bolt decreases as the tightening force increases and after a timing when an inflection point occurs in a time course change in a ratio of an amount of change in the tensile force exerted on the bolt to an amount of change in an angle of rotation of the nut or the bolt, the tightening resulting from the rotation of the nut or bolt is terminated and the tensile force applied on the bolt is removed.

Nut and bolt tightening method and tightening device

Tightening device can fasten a fastening element by a target tightening force with good accuracy and facilitate automation. The tightening device includes a cylindrical drive socket holding a nut in the lower end opening thereof; a nut holder disposed inside the drive socket, a bolt passing through a bottom thereof, and regulating movement of the nut held by the drive socket toward the tip end of a threaded par; a tension rod which is disposed inside the nut holder and the lower end face of which has a threaded hole into which a portion of the threaded part that is further on the tip end side than the nut is screwed; a sensor for detecting tension force; a first motor for turning the tension rod around an axis that extends in the vertical direction; and a second motor for turning the drive socket around an axis.

Tightening device

A fastening device for fastening a bolt to a fastening target object, wherein the bolt has a bolt head female screw section in an inner circumferential surface of a recess provided in an upper surface of a bolt head section. The fastening device includes a tension rod having a rod male screw section engaging the bolt head female screw section; a drive socket circumferentially surrounding the tension rod and having a lower end section with a grasper for laterally grasping the bolt head section; a supporter circumferentially surrounding the drive socket and having a lower end section protruding downward beyond a lower end section of the drive socket; a sensor for sensing compression force acting on the supporter in the upward/downward direction; a first motor for rotating the tension rod around an axis extending in the upward/downward direction; and a second motor for rotating the drive socket around the axis.

Fastening device

In a fastening device for fastening a bolt, a male thread is formed on a side surface of a bolt head part, and a part to be engaged is formed on a top surface of the bolt head part. The fastening device includes a bit having a tension rod having a rod female thread part, and an engaging part installed inside the tension rod and engaging the engaged part, the bit causing the bolt to rotate where the engaged part and engaging part are engaged; a supporter surrounding the tension rod in the circumferential direction such that the lower end part thereof protrudes below the lower end part; a sensor for sensing vertical compression force acting on the supporter; a first motor for causing the bit to rotate about the axis; and a second motor for causing the tension rod to rotate about the vertically extending axis.

According to one embodiment, a battery module includes a plurality of sub-modules. The plurality of sub-modules are integrated. Each of the plurality of sub-modules includes a cell group configured using a plurality of cells connected in series. The plurality of cells configuring the cell group are arranged linearly such that intra-cell current directions are parallel and the intra-cell current direction of each of the cells is opposite to the intra-cell current direction of the cell adjacent to each cell in the cell group. Each of the plurality of sub-modules includes an input terminal to input a current to the cell group and an output terminal to output the current from the cell group.

Battery module, battery, and electric device

According to embodiments, a battery includes: a rectangular box-shaped battery case, an inner portion of which is sealed; a battery module housed in the battery case and being an aggregation of a plurality of battery cells; and a tubular heat resistant sheet arranged between the battery case and the battery module in a state of covering an entire side surface of an inner wall surface of the battery case.

Battery

A tensioning device is configured to apply upward tension to a bolt-nut fastener including a bolt fitted with a fastened member H, and a nut to be fastened to a shaft of the bolt, which protrudes from the fastened member. A first male thread portion is formed on an outer circumferential surface of the nut. The tensioning device includes a connection member having a first female thread portion to be engaged with the first male thread portion, a tensioning mechanism for tensioning the nut via the connection member in a state where the first male thread portion is engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.

Tensioning device

To provide a tensioning device capable of tensioning a bolt from a bolt head side while suppressing increase in the number of components. A tensioning device is configured to apply upward tension to a bolt fastened to a fastened member H. A first male thread portion is formed on an outer circumferential surface of a head of the bolt. The tensioning device includes a connection member having a first female thread portion to be threadly engaged with the first male thread portion, a tensioning mechanism for tensioning the bolt via the connection member in a state where the first male thread portion is threadly engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.

An error of an axial force detection is reduced by tensioning a bolt with a tensioning device engaged with a part of the bolt, different from a shaft portion of the bolt. A tensioning device is configured to apply upward tension to a bolt fastened to a fastened member H, and fitted with a washer. A first male thread portion is formed on an outer circumferential surface of the washer. The tensioning device includes a connection member having a first female thread portion to be engaged with the first male thread portion, a tensioning mechanism for tensioning the connection member in a state where the first male thread portion is engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.

A composite rolling mill roll according to the present invention includes: a steel roll shaft; and an outer layer provided around the roll shaft, in which the outer layer includes a sintered body including a base metal which is an iron alloy, a fibrous inclusion which consists of a ceramic and has an average diameter of 1 to 30 &#x3bc;m and an average aspect ratio of 10 to 500, and a particulate inclusion which consists of a ceramic and has an average diameter of powder 1 to 100 &#x3bc;m, an amount of the fibrous inclusion is 5 to 40 volume % relative to the volume of the sintered body, and an amount of the particulate inclusion is 5 to 30 volume % relative to the volume of the sintered body.

Composite rolling mill roll and rolling method

It is to provide a torque driver capable of bringing a marker into direct contact with a surface of a fastener member such as a screw to perform marking. A torque driveris configured such that a caseis rotated relative to a main shaftwhen a tightening force applied to the caseis transmitted to the main shaftthrough a torque limiter sectionand a tightening torque on a screwengaged with a bitattached to a couplerfixed at a tip portion of the main shaftreaches a torque value set in the torque limiter section. The torque driverincludes: a markerextending from an inside of the couplerto a tip portion of the bitalong a side surface of the bit; and a marker activating sectionthat allows the markerto move forward by utilizing rotation of the caserelative to the main shaftso that a marker tip portionis brought into contact with the screwto perform marking.

Torque driver

A semiconductor package includes a base plate having first and second surfaces both facing in opposite directions, and a plurality of anisotropic heat conducting members disposed in the base plate and spaced away from each other. A semiconductor element having a heat generating unit is mounted on the first surface, and the second surface is supported on a supporting member having a thermal conductivity. Each anisotropic heat conducting member has a sheet shape intersecting with the first and second surfaces, and orientates a direction of higher thermal conductivity than the thermal conductivity of the base plate in a direction from the first surface toward the second surface.

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Tokyo, Japan

Seiji Ito