Abstract: A steering rack meshes with a pinion rotatably driven by the input shaft of a steering gear constituting an automotive steering device. The steering rack is provided with a an axially extending rod part of round cross section, and a plurality of rack teeth formed on a radial one side surface of an axial portion of the rod part, the rack teeth meshing with the pinion. At least one dummy tooth is formed in portions that are axial parts of the rod part and are adjacent to both axial sides of the plurality of rack teeth. The dummy tooth has a tooth height less than the rack teeth and does not mesh with the pinion.

Abstract: A rolling processing device and a rolling processing method are provided to be capable of producing annular members by rolling-forming three or more cylindrical members at the same time while reducing the possibility of breakage of a mandrel. For this purpose, a rolling processing device includes a forming roll, a support roll, and a mandrel. Plural workpieces are arranged on the mandrel alternately in the radial direction of the mandrel. The rolling processing method includes an arranging process for arranging the workpieces on the mandrel and a rolling process.

Abstract: A method for manufacturing an annular member includes: a cylindrical member forming step of forming a cylindrical member with an annular shape from a round bar material; and a cutting and separating step of cutting and separating the cylindrical member over an axial direction of the cylindrical member while rotating the cylindrical member, the cylindrical member being cut and separated by a shear force obtained by restraining molds, which apply an urging force to an outer circumferential surface of the cylindrical member, and by a restraining mold, which is provided with a gap on the outer circumferential surface of the cylindrical member, among a plurality of restraining molds provided on an inner circumferential surface side and an outer circumferential surface side of the cylindrical member along the axial direction, to obtain a plurality of annular members.

Abstract: Provided is a floating structure including an upstream flow passage to pass seawater entering through a seawater inlet, a downstream flow passage to pass seawater from the upstream flow passage to guide the seawater to a seawater outlet, a connecting flow passage connecting the upstream flow passage and the downstream flow passage, and a heat exchanger provided in the connecting flow passage, the heat exchanger cooling down a heat source of the plant facility using seawater. The heat exchanger is placed above an inlet position where seawater enters the connecting flow passage from the upstream flow passage and below an outlet position where seawater exits the connecting flow passage into the downstream flow passage.

Abstract: Provided is a lentiviral vector system which sustains a high-frequency retrograde transportation ability in animal brain and has a higher titer. A kit for preparing a retrograde transport viral vector, which comprises: (1) a packaging plasmid containing the gag gene and pol gene of HIV-1; (2) a packaging plasmid containing an accessory gene of HIV-1; (3) a transfer plasmid containing a target gene; and (4) an envelope plasmid containing, as an envelope gene, a gene encoding a fused polypeptide comprising the extracellular domain of rabies virus glycoprotein (RV-G), the transmembrane domain of rabies virus glycoprotein (RV-G) or vesicular stomatitis virus glycoprotein (VSV-G) and the intracellular domain of vesicular stomatitis virus glycoprotein (VSV-G).

Abstract: Provided is a method for manufacturing a bearing ring member, whereby processing cost can be reduced and a high degree of freedom in design is obtained, by disposing a metal material of a raw material (13a), the metal material having excellent metal characteristics such as fatigue strength and wear resistance and excellent processing characteristics such as hardenability, in a portion that flows to a portion (raceway surface, etc.) where the characteristics of the metal material are required during use or forging of a bearing ring member. The present invention is configured from a first metal part (23) in which the raw material (13a) is formed in a cylindrical shape, and a second metal part (24) formed in a columnar shape by a metal material having more excellent metal characteristics or processing characteristics than the first metal part (23).

Abstract: Provided are a manufacturing method and manufacturing device that allow the depth of rack teeth to be adequately maintained across the axial direction. A stepped surface (47) is provided on one surface in the axial direction of a pressure punch (46) that moves together with a teeth-forming punch (32). The teeth-forming punch (32) is displaced downward and rack teeth are formed on the upper surface of an intermediate material (23). At the same time, the surface on the end in the axial direction of the intermediate material (23) is pressed in the axial direction by a movable die (41a) due to the engagement between the stepped surface (47) and the surface on the other side in the axial direction of the movable die (41a).

Abstract: Provided is a low-cost roller clutch equipped with support bearings having excellent transmission performance and durability and for which it is possible to surely prevent interference between component members. Of the component members of a roller clutch 10b, a first support bearing 29 and second support bearing 30, an outer-ring member 27 is common. A first race member 33, which functions as the inner ring of the first support bearing 29, and a clutch inner-ring member 28 are a single body. The clutch inner-ring member 28 and a second race member 34 of the second support bearing 30 are separate bodies. A clutch retainer 15b is held between the back-end sections of concave sections 19 of a cam surface 18 and the end edge of the second race member 34, and displacement in the axial direction of the clutch retainer 15b is suppressed. As a result, the clutch retainer 15b is prevented from hindering the rotation of the first support bearing 29 and second support bearing 30.

Abstract: Characteristics of joint sections using rivets 11a that join flat sections 12a, 12b of a pair of cage elements are improved regardless of differences in the volumes of the rivets 11a. A head section 16a and a crimped section 19a of a rivet 11a comprise flange sections 23a, 23b and convex sections 24a, 24b. The inside surfaces of the flange sections 23a, 23b press against the outside surfaces of the flat sections 12a, 12b. The convex sections 24a, 24b have a truncated cone shape with the maximum diameter being on the flange section 23a, 23b side. The diameter d24 of the apex of the convex sections 24a, 24b is equal to or less than the inner diameter R15 of circular holes 15, and the outer diameter D23 of the flange sections 23a, 23b is equal to or greater than the outer diameter D24 of the bottom section of the convex sections 24a, 24b.

Abstract: When the column-shaped raw material 10 is subjected to an upsetting process, a simultaneous forward-backward extrusion process, a punching process, a rolling process and a finishing process in order, to obtain an outer ring 3 that constitutes a back-to back double-row angular ball bearing 3, in the simultaneous forward-backward extrusion process, using a floating die 31 having a bottom plate section 35 with a circular convex section 34 and a punch 33 having a punch side convex section 37 provided on an distal end thereof, the section closer to the center in the radial direction of the first intermediate material 11a is compressed in the axial direction, causing the metal material of the first intermediate material 11a to move outward in the radial direction and move approximately uniformly in both extrusion (forward and backward) direction of the punch 33, whereby the middle metal material 29 having a high degree of cleanliness of the column-shaped raw material 10 is exposed over the entire portion that will

Abstract: The present invention provides a lentiviral vector system having a higher titer, while sustaining an excellent retrograde transport ability, particularly, in the brain. The present invention also provides a kit for preparing a retrograde transport viral vector comprising: (1) a packaging plasmid containing the gag gene and the pol gene of HIV-1; (2) a packaging plasmid containing an accessory gene of HIV-1; (3) a transfer plasmid containing an target gene (a transgene); and (4) an envelope plasmid containing, as an envelope gene, a gene encoding a fused polypeptide comprising a fused extracellular domain consisting of the N-terminal region of an extracellular domain of rabies virus glycoprotein (RV-G) and the C-terminal region of an extracellular domain of vesicular stomatitis virus glycoprotein (VSV-G), a transmembrane domain of RV-G or VSV-G, and an intracellular domain of VSV-G, and the like.

Abstract: Characteristics of joint sections using rivets 11a that join flat sections 12a, 12b of a pair of cage elements are improved regardless of differences in the volumes of the rivets 11a. A head section 16a and a crimped section 19a of a rivet 11a comprise flange sections 23a, 23b and convex sections 24a, 24b. The inside surfaces of the flange sections 23a, 23b press against the outside surfaces of the flat sections 12a, 12b. The convex sections 24a, 24b have a truncated cone shape with the maximum diameter being on the flange section 23a, 23b side. The diameter d24 of the apex of the convex sections 24a, 24b is equal to or less than the inner diameter R15 of circular holes 15, and the outer diameter D23 of the flange sections 23a, 23b is equal to or greater than the outer diameter D24 of the bottom section of the convex sections 24a, 24b.

Abstract: When the column-shaped raw material 10 is subjected to an upsetting process, a simultaneous forward-backward extrusion process, a punching process, a rolling process and a finishing process in order, to obtain an outer ring 3 that constitutes a back-to back double-row angular ball bearing 3, in the simultaneous forward-backward extrusion process, using a floating die 31 having a bottom plate section 35 with a circular convex section 34 and a punch 33 having a punch side convex section 37 provided on an distal end thereof, the section closer to the center in the radial direction of the first intermediate material 11a is compressed in the axial direction, causing the metal material of the first intermediate material 11a to move outward in the radial direction and move approximately uniformly in both extrusion (forward and backward) direction of the punch 33, whereby the middle metal material 29 having a high degree of cleanliness of the column-shaped raw material 10 is exposed over the entire portion that will

Abstract: A method of manufacturing a drawn cup needle roller bearing having a seal ring, including forming the seal ring by a press working by: punching a metal plate to form an annular first intermediate material; subjecting the first intermediate material to burring working such that a portion close to an inner diameter of the first intermediate material is bent in an axial direction at a right angle to form an annular second intermediate material having an L-shaped cross section, the second intermediate material comprising a cylindrical portion and an outward flange portion which is bent radially outward from an axial end portion of the cylindrical portion; removing the outward flange portion to form a cylindrical third intermediate; and subjecting the third intermediate material to cold rolling working to regulate an inner diameter, an outer diameter and a cross sectional shape of the third intermediate material.

Abstract: A method forms a concave constituting a ball return passage directly on an inner circumferential surface of a nut blank by plastic working without damaging a die. Letter S shaped concaves are formed on an inner circumferential surface of a nut blank, by pressing by use of a die having a blank holder, a cam driver, cam sliders, and a cylindrical member. The cam driver has inclined surfaces having the same angle of inclination as the cam sliders. The cam sliders have letter S shaped convexes corresponding to the letter S shaped concaves, and are held by through holes, respectively. When the cam driver is pressed from the top thereof, the cam sliders move outwardly in the radial direction, respectively, and the letter S shaped convexes push the inner circumferential surface of the nut blank for plastic deformation.

Abstract: A raceway member (6) of a wheel support hub unit, having wheel or vehicle body fixing portions (7) extending radially outward from a solid or hollow shaft portion, and a wheel or vehicle body positioning cylindrical portion (9) extending concentrically with the shaft portion, the fixing portion (7) being formed by the cold side extrusion so that the fixing portion is integral with the shaft portion (5).

Abstract: An expansion valve for reducing the quantity of material required for the valve body by contriving the arrangement of bolt fitting grooves. In the expansion valve (20), displacement of a valve member driver (36) provided in the valve body (21) is transmitted to a valve member by a valve member drive rod (36f) and the valve opening is altered to control the flow rate of the refrigerant. The valve body (21) consists of a body upper portion (40) and a body lower portion (41) narrower than the body upper portion (40), and bolt fitting grooves (43, 43) opening in the flank of the valve body (21), preferably opening obliquely downward, are formed at the boundary (42) of the body upper portion (40) and the body lower portion (41). With such a layout, the material required at the boundary (42) can be reduced furthermore and the quantity of material required for the valve body (21) can be reduced furthermore, as a result.

Abstract: There is provided a method of manufacturing an outwardly flanged metal member, by which a metal member having outward flange portions which extend radially outwardly from a plurality of positions along a circumferential direction on an outer peripheral surface can be formed without a flash, or with a reduced amount of a flash. While surrounding a periphery of a metal blank 15 by a stationary die 21 and a movable die 22 and butting a distal face of the movable die 22 and a distal face of the stationary die 21, an axial end face of the blank 15 is plastically deformed by pressing the axial end face with the punch under a warm or hot condition to form the outward flange portions 7a by filling flange molding cavities 32 with a portion of the blank 15.

Abstract: A dehydrating system using multiple water separation membranes aims to prevent damage to the water separation membrane units and also to take appropriate measures against decrease in water permeation rate of the water separation membranes. Provided is a dehydrating system (100) for removing water from a target fluid, including at least two water separation membrane units (1, 2, 3) connected in series in a flow direction of the target fluid; two or more heat exchangers (11, 21, 31) respectively provided in front of the water separation membrane units (1, 2, 3), each of the heat exchangers (11, 21, 31) raising a temperature of the target fluid to a temperature which is lower than a boiling point of the target fluid but close to the boiling point.

Abstract: To reduce a weight of a valve main body of an expansion valve formed by an extrusion molding of a metal material such as an aluminum alloy or the like. A valve main body 100 is made of a material obtained by an extrusion molding of a metal material such as an aluminum alloy or the like. Two pair of holding faces 101a and 101b, and 102a and 102b are formed on both side face 100a and 100b in the extruding direction of the valve main body 100, and the other portions are to be concave as much as possible, so that the weight can be reduced. The holding faces 101a and 101b and the holding faces 102a and 102b are parallel faces, and come to be holding faces for chuck claws C1 and C2 at a time of machining.