Abstract: A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes for blowing a working gas are on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.

Abstract: A molten iron refining method having, an auxiliary material, and an oxidizing gas supplied through a top-blowing lance, to a cold iron source and molten pig iron that are contained/fed in a converter-type vessel, and molten iron is subjected to a refining process. A pre-charged cold iron source is charged into the converter-type vessel at an amount not larger than 0.15 times. A furnace-top-added cold iron source that's part or all of the cold iron source and added from a furnace top is fed during the refining process. A burner at a leading end of the top-blowing lance that spray holes through which a fuel and a combustion-supporting gas are ejected. During the refining process, a powdery auxiliary material processed into powder that's part of the auxiliary material is blown in, to pass through a flame formed by the burner.

Abstract: A method that, regarding a process of refining molten iron, can increase the thermal margin and the amount of cold iron source to be used. A burner having jetting holes for jetting a fuel and a combustion supporting gas is provided at a leading end part of one lance that top-blows an oxidizing gas to molten iron contained in a converter-type vessel, or at a leading end part of another separate lance. A powdery auxiliary raw material or an auxiliary raw material processed into a powder form that is blown into the molten iron from the one lance or the other lance passes through a flame formed by the burner. This top-blowing lance for a converter is configured to secure a predetermined heating time and powder-fuel ratio. Also, a method for adding an auxiliary raw material and a method for refining of molten iron that use this top-blowing lance.

Abstract: Proposed is a molten iron refining method capable of securing an in-flame staying time period of a heat transfer medium without being influenced by height adjustments of a blowing-purpose oxygen-blowing lance. As far as to a position lower than an upper end inside a converter-type vessel 1, a blowing-purpose oxygen-blowing lance 3 that supplies oxidizing gas and is capable of ascending and descending and at least one burner lance 4 capable of ascending and descending independently of the blowing-purpose oxygen-blowing lance are inserted. From the blowing-purpose oxygen-blowing lance, either oxidizing gas or oxidizing gas and CaO-containing refining agent are blown onto the molten iron. Also, a flame is formed by causing the burner lance to discharge fuel gas and combustion supporting gas. Powder particles discharged from the burner lance are caused to pass through the flame and to be blown onto the molten iron in a heat-transferred state, so that the molten iron is thermally compensated.

Abstract: A light emitting device includes: a base having a bottom face and a lateral part surrounding the bottom face and extending upwards from the bottom face, wherein the lateral part has an uppermost face and includes a first stepped portion including a first upper face and a second stepped portion including a second upper face, wherein the first upper face and the second upper face are disposed below the uppermost face, wherein the first upper face and the second upper face are disposed inward of the uppermost face in a top view, and wherein a height of the first stepped portion from the bottom face is lower than a height of the second stepped portion from the bottom face; a semiconductor laser element disposed on the bottom face; and a light reflective member and/or an optical member disposed on the bottom face.

Abstract: A light emitting device includes: a base having a bottom face and a lateral part surrounding the bottom face and extending upwards from the bottom face, wherein the lateral part comprises a first stepped portion and a second stepped portion facing the first stepped portion; a first semiconductor laser element disposed on the bottom face and located between the first stepped portion and the second stepped portion in a top view, wherein the first semiconductor laser element is configured to emit light towards the second stepped portion; a first wiring region located on the first stepped portion; and one or more first wires, each having a first end that is connected to the first wiring region. At least one of the one or more first wires is electrically connected to the first semiconductor laser element.

Abstract: A manufacturing method of a light-emitting device includes: preparing a mounting substrate having a mounting surface, the mounting substrate including a first metal pattern arranged on a mounting surface side, a second metal pattern arranged on the mounting surface side inward of the first metal pattern in a plan view, and a third metal pattern arranged on the mounting surface side outward of the first metal pattern in the plan view; arranging a light-emitting element over the mounting surface of the mounting substrate; applying a bonding material to the first metal pattern; and joining a sealing member to at least the first metal pattern of the mounting substrate via the bonding material, the sealing member including a fourth metal pattern with a width greater than or equal to a width of the first metal pattern.

Abstract: A light emitting device includes: a base having a bottom face and a lateral part surrounding the bottom face and extending upwards from the bottom face, wherein the lateral part comprises a first stepped portion and a second stepped portion facing the first stepped portion; a first semiconductor laser element disposed on the bottom face and located between the first stepped portion and the second stepped portion in a top view, wherein the first semiconductor laser element is configured to emit light towards the second stepped portion; a first wiring region located on the first stepped portion; and one or more first wires, each having a first end that is connected to the first wiring region. At least one of the one or more first wires is electrically connected to the first semiconductor laser element.

Abstract: A light emitting device includes: a base having a first stepped portion and a second stepped portion; a light emitting element; an electronic member configured to be irradiated by light emitted from the light emitting element; a first wiring region located on the first stepped portion; a second wiring region located on the second stepped portion; wires connected to the light emitting element and the electronic member. The wires includes a first and second wires. The first wire has a first end that is connected to the first wiring region, and a second end. The second wire has a first end that is connected to the second wiring region, and a second end. A position of the second end of the first wire relative to the bottom face is lower than a position of the second end of the second wire relative to the bottom face.

Abstract: A light detecting element is realized in which a length thereof is reduced in a direction perpendicular to a direction in which light detecting regions are disposed side by side. A light detecting element includes a light detecting surface provided with a plurality of light detecting regions disposed side by side in a first direction and a plurality of wiring regions electrically connected to the plurality of light detecting regions. Of the plurality of wiring regions, a plurality of the wiring regions connected to a plurality of the light detecting regions are provided in an end region that is a region excluding a central region at the light detecting surface.

Abstract: A light emitting device includes: a base having a first stepped portion and a second stepped portion; a light emitting element; an electronic member configured to be irradiated by light emitted from the light emitting element; a first wiring region located on the first stepped portion; a second wiring region located on the second stepped portion; wires connected to the light emitting element and the electronic member. The wires includes a first and second wires. The first wire has a first end that is connected to the first wiring region, and a second end. The second wire has a first end that is connected to the second wiring region, and a second end. A position of the second end of the first wire relative to the bottom face is lower than a position of the second end of the second wire relative to the bottom face.

Abstract: A pin assembly suitable for mounting a track roller bogie on a track frame of a crawler type traveling apparatus includes first to third rings disposed on an outer peripheral surface of a pin having lubricant supply passages. Seals are disposed between end faces of the respective rings and end faces other than those of the seals are formed in slide contact faces, which slidably direct contact with each other. As compared with a conventional case in which spacers are installed between the first to third rings, the total wear amount of the slide contact faces is remarkably reduced, the number of parts is reduced by abolishing the conventional spacers which caused defective lubrication, and a load between the rings in a thrust direction is directly received between the rings. As a result, the troublesomeness of an assembly of track roller bogie and a reduction in service life due to defective lubrication can be eliminated.

Abstract: A pin assembly (112) suitable for mounting a track roller bogie (5) on a track frame (1) of a crawler type traveling apparatus, wherein first to third rings (114 to 116) are disposed on an outer peripheral surface of a pin (13) having lubricant supply passages. Sealing means (18, 19) are disposed between end faces of the respective rings (114 to 116) and end faces other than those of the sealing means (18, 19) are formed in slide contact faces (114b, 115b; 115c, 116b), which slidably direct contact with each other. As compared with a conventional case in which spacers are installed between the first to third rings, the total wear amount of the slide contact faces is remarkably reduced, the number of parts is reduced by abolishing the conventional spacers which caused defective lubrication, and a load between the rings in a thrust direction is directly received between the rings.

Abstract: A drive assembly for a track-type vehicle which makes the effective ground contact length within the tumbler distance as large as possible. The drive assembly has a single track roller unit disposed closest to the idler and closest to the sprocket respectively, each for supporting the track roller rotatably at the distal end portion of an arm attached at its proximal end portion rockably to the track frame and for bearing a vehicle body load at the distal end portion of the arm through elastic members, and a double track roller unit interposed between the single track roller units and including a first arm attached at its proximal end portion to the track frame and a second arm attached at its central portion to the distal end portion of the first arm, for supporting the paired lower rollers at the two end portions of the second arm.

Abstract: A drive assembly for a track-type vehicle which makes the effective ground contact length within the tumbler distance as large as possible. The drive assembly has a single track roller unit disposed closest to the idler and closest to the sprocket respectively, each for supporting the track roller rotatably at the distal end portion of an arm attached at its proximal end portion rockably to the track frame and for bearing a vehicle body load at the distal end portion of the arm through elastic members, and a double track roller unit interposed between the single track roller units and including a first arm attached at its proximal end portion to the track frame and a second arm attached at its central portion to the distal end portion of the first arm, for supporting the paired lower rollers at the two end portions of the second arm.

Abstract: A track roller bogie is pivotally supported by a pin assembly, in which a spacer for receiving a thrust load is abolished and the thrust load is supported by outer rings of the pin assembly themselves. It makes possible to assemble a pin assembly easier and to elongate a service life of the track bogie.