Abstract: An image measurement system includes a controller, a projector for emitting illumination light in accordance with a radiation pattern, an imaging unit, and a display unit. The controller includes a display control module for displaying on a display unit an image of a field of view captured by the imaging unit in a state in which illumination light is emitted, a receiving module for receiving a setting of a mask area in association with the image displayed on the display unit, the mask area being an area in which the quantity of illumination light should be reduced compared with another area in the field of view, and an updating module for updating the radiation pattern in accordance with the set mask area, based on a correspondence in position between the radiation pattern of the projector and a projection pattern produced in the field of view by the radiation pattern.

Abstract: The present invention provides a pneumatic tire capable of exhibiting improved on-snow cornering performance on a snowy road and improved on-ice cornering performance on an icy road surface. Specifically, the pneumatic tire comprises: a tread portion (1) including a ground contact surface (5) to be brought into contact with a road surface when the tire is rotated; a pair of sidewall portions (3) forming side surfaces of the tire and extending from the tread portion (1) toward the inner side in the tire radial direction, respectively; and buttress portions each forming an outer surface region (7) ranging from an end portion in the width direction of the ground contact surface (5) to the corresponding sidewall portion (3), wherein polygonal blocks (11) are formed in the outer surface region (7) by demarcation by grooves (9).

Abstract: An image measurement system includes a controller, a projector for emitting illumination light in accordance with a radiation pattern, an imaging unit, and a display unit. The controller includes a display control module for displaying on a display unit an image of a field of view captured by the imaging unit in a state in which illumination light is emitted, a receiving module for receiving a setting of a mask area in association with the image displayed on the display unit, the mask area being an area in which the quantity of illumination light should be reduced compared with another area in the field of view, and an updating module for updating the radiation pattern in accordance with the set mask area, based on a correspondence in position between the radiation pattern of the projector and a projection pattern produced in the field of view by the radiation pattern.

Abstract: By adopting an appropriate block pattern, a pneumatic tire guarantees the tire ground contact area without impairing drainage performance and enhances on-ice performance. On the tread are formed land portions (5a, 5b) defined by at least one circumferential main groove (3) extending in the tire circumferential direction and blocks (11) in a shoulder land portion (5b) located outermost in the tire width direction among the land portions (5a, 5b), the blocks (11) being defined by narrow grooves (7a, 7b) with a groove width narrower than that of the circumferential main groove (3) and by at least one auxiliary groove (9) with a groove width that increases outward in the tire width direction at least in a region not adjacent to the circumferential main groove. The area of the tread surface of each of the blocks (11) is in a range of 100 mm2 to 200 mm2.

Abstract: In a tread part (1), a tilted land portion (200) is divided into multiple blocks by a tilted narrow groove (300) and branched narrow grooves (350). Tilted main grooves (100) include an upper tilted main groove (101) and a lower tilted main groove (102). The branched narrow grooves (350) include first branched narrow grooves (350a) and second branched narrow grooves (350b). First blocks (210) and second blocks (220) have quadrilateral or pentagonal shapes. Of the first blocks (210), one first block and another first block adjacent to the one first block in a tilt direction KC have the same shape. Of the second blocks (220), one second block and another second block adjacent to the one second block in the tilt direction KC have the same shape.

Abstract: A pneumatic tire according to the present invention includes, one or more main grooves extending in the tire circumferential direction, and a plurality of lateral grooves extending in the tire width direction, the main grooves and the lateral grooves defining a block row formed by a plurality of blocks, at least one sipe being disposed in each block. Each block has a first cutaway groove with one end opening into a lateral groove located on one side of the block and the other end terminating within the block, a second cutaway groove with one end opening into a lateral groove located on the other side of the block and the other end terminating within the block, and a connecting narrow groove having a groove width narrower than that of the first and the second cutaway groove and connecting the first and the second cutaway groove.

Abstract: A pneumatic tire includes two circumferential main grooves within a ground-contact width of a tread, and a group of polygonal blocks between the two circumferential main grooves. The group of polygonal blocks includes a plurality of polygonal blocks arranged in at least two longitudinal rows in a tire circumferential direction and a plurality of transverse rows in a tire width direction. Each polygonal block has not less than five sides, and is defined by narrow grooves. The polygonal blocks in the adjacent longitudinal rows are arranged so as to be staggered from each other in the tire circumferential direction. The group of polygonal blocks has a widthwise center that is positioned within a 50% width region of the ground-contact width of the tread across a tire equatorial plane.

Abstract: Provided is a pneumatic tire in which a polygonal block group is provided between two circumferential main grooves in a tread ground contact width, the polygonal block group comprising a plurality of polygonal blocks with five or more sides which are demarcated by thin grooves and arranged in at least two longitudinal rows and a plurality of lateral rows, the longitudinal rows being arranged so that the polygonal blocks included in adjacent longitudinal rows differ in phase from each other in a tire circumferential direction; side block rows are provided, one on each of the two sides in the tire width direction of the polygonal block group, the side block rows comprising a plurality of side blocks which are demarcated by the circumferential main grooves, lateral grooves, and the thin grooves and arranged in the tire circumferential direction; and a length in the tire circumferential direction of a first side block included in a first side block row provided on one side is larger than the length in the tire ci

Abstract: A pneumatic tire comprises, in a tread portion 1, at least two block groups GB1 to GB3 whose block number density is within a range of 0.003 pieces/mm2 to 0.04 pieces/mm2. At least one block group GB2 includes block 4 in which lateral length BW2 is larger that its longitudinal length BL2.

Abstract: The present invention provides a pneumatic tire capable of exhibiting improved on-snow cornering performance on a snowy road and improved on-ice cornering performance on an icy road surface. Specifically, the pneumatic tire comprises: a tread portion (1) including a ground contact surface (5) to be brought into contact with a road surface when the tire is rotated; a pair of sidewall portions (3) forming side surfaces of the tire and extending from the tread portion (1) toward the inner side in the tire radial direction, respectively; and buttress portions each forming an outer surface region (7) ranging from an end portion in the width direction of the ground contact surface (5) to the corresponding sidewall portion (3), wherein polygonal blocks (11) are formed in the outer surface region (7) by demarcation by grooves (9).

Abstract: A pneumatic tire with further improved tire performance on snow and ice. A center block row 30 is formed to a tread portion 16, with second block rows 32A, 32B formed adjacent at each side on the tire width direction outside of the center block row 30. Central lug grooves 24P, 24Q are formed in the center block row 30 so as to have mutually different inclination directions with respect to the tire width direction. End portions 25P at the ground contact rear end side of the central lug grooves 24Q during tire forward rotation are positioned in blocks 33B of the second block row 32B, and end portions 25Q of the ground contact rear end side of the central lug grooves 24P are positioned in blocks 33A of the second block row 32A.

Abstract: In a present invention, in a pneumatic tire 1A, a circumferential groove 32 extending in a tire circumferential direction is formed by land portions 20 constituting a tread surface 10 coming into contact with a road surface. A flat groove portion 60 and an in-groove land portion 70 are formed in the circumferential groove 32. The flat groove portion 60 is a flat surface of a groove bottom 32a of the circumferential groove 32. The in-groove land portion 70 is raised toward the tread surface 10 side from the groove bottom 32a of the circumferential groove 32. Multiple narrow grooves 80 extending in a tread width direction are formed in the in-groove land portion 70. A wide-groove width W1 of the circumferential groove 32 in the tread width direction is 5 to 30% of a tread width TW of the tread surface in the tread width direction.

Abstract: By adopting an appropriate block pattern, a pneumatic tire guarantees the tire ground contact area without impairing drainage performance and enhances on-ice performance. On the tread are formed land portions (5a, 5b) defined by at least one circumferential main groove (3) extending in the tire circumferential direction and blocks (11) in a shoulder land portion (5b) located outermost in the tire width direction among the land portions (5a, 5b), the blocks (11) being defined by narrow grooves (7a, 7b) with a groove width narrower than that of the circumferential main groove (3) and by at least one auxiliary groove (9) with a groove width that increases outward in the tire width direction at least in a region not adjacent to the circumferential main groove. The area of the tread surface of each of the blocks (11) is in a range of 100 mm2 to 200 mm2.

Abstract: A pneumatic tire comprising, in a tread portion 1, at least two block groups GB, each block group being composed of a plurality of independent blocks 4 defined by grooves, wherein the block groups GB have at least two different values of block number densities D, each of the block number densities D being represented by the formula: D=a/{PL×W×(1?N/100)}, wherein PL (mm) represents a reference pitch length of the block 4 in the block group GBn, W (mm) represents a width of the block group, a (pieces) represents the number of the blocks existing in a reference zone of the block group, the reference zone being demarcated by the reference pitch length PL and the width W, and N (%) represents a negative ratio in the reference zone; wherein the block number density of at least one block group is within a range of 0.003 (pieces/mm2) to 0.04 (pieces/mm2).

Abstract: A pneumatic tire according to the present invention includes, one or more main grooves extending in the tire circumferential direction, and a plurality of lateral grooves extending in the tire width direction, the main grooves and the lateral grooves defining a block row formed by a plurality of blocks, at least one sipe being disposed in each block. Each block has a first cutaway groove with one end opening into a lateral groove located on one side of the block and the other end terminating within the block, a second cutaway groove with one end opening into a lateral groove located on the other side of the block and the other end terminating within the block, and a connecting narrow groove having a groove width narrower than that of the first and the second cutaway groove and connecting the first and the second cutaway groove.

Abstract: To improve water evacuation property while preventing uneven wear, as well as to significantly improve the on-ice/snow performances by optimizing a tread pattern. This pneumatic tire has, in at least a part of a tread portion 1, a small block group GB, the small block group including a plurality of small blocks 3 arranged close together. The small block group GB comprises at least one circumferential main groove positioned 4 including see-through groove portion which linearly extends in the tread circumferential direction and at least one rib-like land portion 6 provided adjacently to the circumferential main groove and forming a groove side face 5 of the circumferential main groove 4 and continuously extending in the circumferential direction. A number density D of the small blocks is set within a range of 0.003 to 0.04 (pieces/mm2), the number density D representing the number of the small blocks per unit of an actual ground contact area of the small block group.

Abstract: To significantly improve performances on ice by optimizing a tread pattern. This pneumatic tire has, in at least a part of a tread portion 1, a block group GB formed by arranging blocks 3 close to each other, the blocks being defined by grooves 2 and being independent of each other, and when a symbol P (mm) stands for a reference pitch length of the blocks in the block group GB, a symbol W (mm) stands for a width of the block group GB, a symbol a (pieces) stands for the number of the blocks 3 existing in a reference zone Z of the block group GB, the reference zone being comparted by the reference pitch length P and the width W, and a symbol N (%) stands for a negative ratio in the reference zone Z, a block number density S, which is the number of the blocks per unit of an actual ground contact area of the block group GB and given by a formula of S=a/{P×W×(1?N/100)}, is set within a range of not less than 0.003 (pieces/mm2) but not more than 0.04 (pieces/mm2).