Abstract: An elastic crawler includes an endless elastic body; cores that each include a core body and a pair of protrusions; lugs, on the outer circumferential side of the elastic body, each disposed so as to avoid a crawler circumferential direction area corresponding to at least a portion of the core in the crawler circumferential direction; and grooves, on the crawler inner circumferential surface, each positioned outward in the crawler width direction from the pair of protrusions in a crawler circumferential direction area corresponding to the core, each of the grooves being recessed relative to crawler inner circumferential surface portions adjacent to the groove on both sides in the crawler circumferential direction.

Abstract: A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (F) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (O1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (O1) of the tooth (12) at an angle (A1) in a range of 0° or greater to 7.5° or less so as to approach the center line (O1) of the tooth (12) towards a tooth tip surface (12d).

Abstract: This disclosure is to provide an elastic crawler drive mechanism including an elastic crawler (20) with engaging portions (22) disposed on an endless belt (21), and a sprocket (10) having teeth (12), wherein: engaging surfaces (F2) of the engaging portions (22) have flat engaging planes (22b) in contact with a part of tooth surfaces (F1) of the sprocket (10) when in contact with tooth bottom surfaces (11a) of the sprocket (10), and when the engaging portions (22) are in contact with the tooth bottom surfaces (11a), and simultaneously the engaging planes (22b) are in contact with the tooth surfaces (F1) of the sprocket (10), at least one of the tooth surfaces (F1) of the sprocket (10) and the engaging planes (22b) of the engaging portions (22) form gaps (C) between the tooth surfaces (F1) and the engaging planes (22b), on sides closer to the tooth bottom surfaces (11a) than contact portions (P) of the tooth surfaces (F1) and the engaging planes (22b).

Abstract: An elastic crawler includes an endless elastic body; cores that each include a core body and a pair of protrusions; lugs, on the outer circumferential side of the elastic body, each disposed so as to avoid a crawler circumferential direction area corresponding to at least a portion of the core in the crawler circumferential direction; and grooves, on the crawler inner circumferential surface, each positioned outward in the crawler width direction from the pair of protrusions in a crawler circumferential direction area corresponding to the core, each of the grooves being recessed relative to crawler inner circumferential surface portions adjacent to the groove on both sides in the crawler circumferential direction.

Abstract: A crawler of the present invention includes a crawler body that is formed in an endless shape from an elastic material, a main cord layer that is embedded in the crawler body, and that is configured including one or plural main cords extending along a crawler peripheral direction, and a reinforcement layer that is embedded in the crawler body, and that is configured including plural monofilament cords disposed around the entire crawler peripheral direction so as to intersect the main cord direction.

Abstract: A rubber crawler includes a rubber belt, a main cord layer that is incorporated within the rubber belt and includes a main cord extending around the crawler circumferential direction, a bias cord layer that is incorporated further to the crawler circumferential outside than the main cord layer and is configured from bias cords extending at an angle with respect to the crawler circumferential direction, a bias cord layer that is interposed between the bias cord layer and the main cord layer, and is configured from bias cords extending at an angle with respect to the crawler circumferential direction so as to intersect the first bias cords, and a reinforcement cord layer that is interposed between the bias cord layer and the bias cord layer, and is configured from reinforcement cords extending in the crawler width direction.

Abstract: A rubber crawler includes a rubber belt, a main cord layer that is incorporated within the rubber belt and includes a main cord configured from plural twisted strands covered with rubber, the main cord extending around the crawler circumferential direction, and a bias cord layer incorporated within the rubber belt at the crawler circumferential outside of the main cord layer configured by at least one bias ply and configured from at least one bias ply that is formed from a plurality of bias cords extending at an angle with respect to the crawler circumferential direction, disposed side-by-side around the crawler circumferential direction and covered in rubber such that bias cords of the bias ply at the circumferential outermost side of the crawler are, as viewed from the crawler circumferential outside, angled toward an opposite side, with respect to the crawler circumferential direction, from the angled side of the strands.

Abstract: Providing a crawler core member that can be coupled in a simple operation without employing dedicated coupling components, and that can suppress deformation due to input from a road surface. Coupling can be achieved by a simple operation without employing dedicated coupling components, and deformation due to input from a road surface can be suppressed in a crawler core member 20 that configures an endless crawler belt 13 when plural of the core members are disposed at uniform intervals along a peripheral direction S and the peripheral direction adjacent core members 20 are coupled together. The core member 20 includes a pin portion 22 extending in the width direction, a hooking groove 34 integrally formed to the pin portion 22 and hooking onto the pin portion 22 of an adjacent core member 20, and a pair of wing portions 30 integrally formed to the pin portion 22 and respectively disposed at both width direction sides of the pin portion 22, extending towards the width direction outsides.

Abstract: In some embodiments, a head mounted display is provided, comprising a light guide, at least first and second diffraction gratings, alignment marks A1 and B1 associated with the first diffraction grating, and alignment marks A2 and B2 associated with the second diffraction grating. The first diffraction grating may be disposed on a first surface of the light guide, the first surface facing away from a light input. The second diffraction grating may be disposed on a second surface of the light guide, the second surface facing towards the light input. The second diffraction grating may be adapted to diffract at least some of the light input into the light guide, and the first diffraction grating may be adapted to diffract at least some light transmitted through the light guide back into the light guide.

Abstract: A rubber crawler includes a rubber belt, a main cord layer that is incorporated within the rubber belt and includes a main cord extending around the crawler circumferential direction, a bias cord layer that is incorporated further to the crawler circumferential outside than the main cord layer and is configured from bias cords extending at an angle with respect to the crawler circumferential direction, a bias cord layer that is interposed between the bias cord layer and the main cord layer, and is configured from bias cords extending at an angle with respect to the crawler circumferential direction so as to intersect the first bias cords, and a reinforcement cord layer that is interposed between the bias cord layer and the bias cord layer, and is configured from reinforcement cords extending in the crawler width direction.

Abstract: A rubber crawler includes a rubber belt, a main cord layer that is incorporated within the rubber belt and includes a main cord configured from plural twisted strands covered with rubber, the main cord extending around the crawler circumferential direction, and a bias cord layer incorporated within the rubber belt at the crawler circumferential outside of the main cord layer configured by at least one bias ply and configured from at least one bias ply that is formed from a plurality of bias cords extending at an angle with respect to the crawler circumferential direction, disposed side-by-side around the crawler circumferential direction and covered in rubber such that bias cords of the bias ply at the circumferential outermost side of the crawler are, as viewed from the crawler circumferential outside, angled toward an opposite side, with respect to the crawler circumferential direction, from the angled side of the strands.

Abstract: Providing a crawler core member that can be coupled in a simple operation without employing dedicated coupling components, and that can suppress deformation due to input from a road surface. Coupling can be achieved by a simple operation without employing dedicated coupling components, and deformation due to input from a road surface can be suppressed in a crawler core member 20 that configures an endless crawler belt 13 when plural of the core members are disposed at uniform intervals along a peripheral direction S and the peripheral direction adjacent core members 20 are coupled together. The core member 20 includes a pin portion 22 extending in the width direction, a hooking groove 34 integrally formed to the pin portion 22 and hooking onto the pin portion 22 of an adjacent core member 20, and a pair of wing portions 30 integrally formed to the pin portion 22 and respectively disposed at both width direction sides of the pin portion 22, extending towards the width direction outsides.

Abstract: A light irradiator used as a laser annealing apparatus is provided which includes a controller (9) which controls a solid-state laser (4) to make pulse-on operation by detecting that the angle of rotation of a rotating shaft (7a) becomes +? after the rotating direction of the rotating shaft (7a) changes from clockwise to counterclockwise and then make pulse-off operation by detecting that the angle of rotation become ??, while controlling the solid-state laser (4) to make the pulse-on operation by detecting that the angle of rotation becomes ?? after the rotating direction changes from counterclockwise to clockwise and then make the pulse-off operation by detecting that the angle of rotation becomes +?.

Abstract: There is provided a three-dimensional object observing microscope which can easily observe a three-dimensional object in a three-dimensional manner. A three-dimensional object observing microscope comprising a table on which a three-dimensional object is placed, an imaging part which consists of an imaging lens and an imaging camera for imaging this three-dimensional object from an inclined upper position, and a casing which supports the imaging part rotatably in a horizontal direction and also integrally supports the table and the imaging part.

Abstract: A combustion method for an internal combustion engine which prevents the occurrence of engine knock and improves fuel consumption and economy, by spray injecting part of the fuel used in one cycle into a combustion chamber, performing preliminary combustion of a diluted air-fuel mixture below combustible limits at a temperature lower than the self-igniting temperature of the fuel, then injecting the remaining fuel into the combustion chamber, and performing main combustion by flame propagation using spark plugs as ignition sources. Accordingly, the combustion method for an internal combustion engine of the present invention can attain stable combustion even at high air-fuel ratios and makes high compression ratios possible.

Abstract: A bearing assembly comprises a thrust bearing including balls, a fixed wheel having an inner wheel hub and a ball supporting end surface which supports the balls in a first direction of thrust and a rotary wheel having an outer wheel and a ball supporting end surface which supports the balls in a second direction of thrust, and a radial bearing fixed to the inner wheel hub of the fixed wheel of the thrust bearing.