Abstract: A rotation speed measuring machine for a flying globe is formed of a light projecting device 10 projecting light on a measurement conducting area A which is a space including an expected flying route of a flying globe B after the globe has been hit at a hitting position, a light receiving device 20 which receives reflection light from the flying globe flying in the measurement conducting area A and which outputs a signal according to the fluctuation of the amount of reflected light, and a rotational speed detecting means 30 detecting the rotational speed of the flying globe B based on the output signal from the light receiving device 20 in order to measure the rotational speed of the flying globe B by putting a mark M having a light reflectance rate different from the reflectance rate of the surface texture on a part of the surface of the flying globe B and by detecting the amount of reflected light from the mark.

Abstract: A tire grooving apparatus according to the present invention consists of a movable block (5) movable at least in a lateral direction parallel with a tire support shaft, a vertically movable block (7) provided on the movable blocks, and a pivotable arm (81) provided on the block (7) and having a cutter support device (9) at the free end portion thereof, characterized in that the apparatus is further provided with a center deviation detector (13) for detecting a deviation of center line of a tire tread surface, or both the center deviation detector (13) and a lateral runout detector (14). A tire grooving method according to the present invention is characterized in that an actual measurement obtained by the center deviation detector (13), or both an actual measurement obtained by the center deviation detector (13) and an actual measurement obtained by the lateral runout detector (14) are utilized for the correction of the quantity of movement of a cutter (10).

Abstract: A tire grooving apparatus according to the present invention consists of a movable block (5) movable at least in a lateral direction parallel with a tire support shaft, a vertically movable block (7) provided on the movable blocks, and a pivotable arm (81) provided on the block (7) and having a cutter support device (9) at the free end portion thereof, characterized in that the apparatus is further provided with a center deviation detector (13) for detecting a deviation of center line of a tire tread surface, or both the center deviation detecetor (13) and a lateral runout detector (14). A tire grooving method according to the present invention is characterized in that an actual measurement obtained by the center deviataion detector (13), or both an actual measurement obtained by the center deviation detector (13) and an actual measurement obtained by the lateral runout detector (14) are utilized for the correction of the quantity of movement of a cutter (10).

Abstract: A tire grooving apparatus according to the present invention consists of a movable carriage (3) adapted to be moved at least in the direction parallel with a tire support shaft (21), a vertically movable block (32) provided on the carriage (3) and adapted to be moved freely in the vertical direction, and a pivotable arm (4), provided on the block (32), having a cutter support unit (5) at the free end portion thereof. The cutter support unit (5) of the invention is movable up and down independently of movable block (32). As the cutter support unit (5) which is attached to the free end portion of the pivotable arm (4) can be so moved up and down independently, the depth of a tread pattern groove can be adjusted and a cutting position of a cutter (6) set arbitrarily, without replacing the cutter (6), without moving the block (32) vertically and without need of a program for correcting the quantity of movement of the cutter.

Abstract: A method and an apparatus for compensating a radial deflection and/or a lateral deflection in tire grooving wherein a cutter movement is controlled by a plurality of operating shafts and a desired pattern grooves are formed in a tire surface, wherein the radial deflection in a direction along diameter of the tire, which is supported by a tire supporting shaft, and/or the lateral deflection in a direction along diameter of the tire are detected before or during tire grooving, an a radially driving member, which moves a cutter in a direction along diameter of the tire, and/or a laterally driving member, which moves a cutter in a direction along width of the tire, are actuated in accordance with a reference program, and concurrently a movement of the radially driving member and/or a movement of the laterally driving member are adjusted in accordance with a correction program based on the detected deflection value in order to follow the radial deflection and/or the lateral deflection.

Abstract: A cutter supporting unit for a tire grooving apparatus having a tire supporting shaft and a cutter supporting unit which brings a cutter in or out of contact with a tire held by the tire supporting shaft, wherein that said cutter supporting unit includes a cutter holder which holds the cutter and a cutter supporting frame to which the cutter holder is releasably connected. The unit largely reduces time and labor necessary for the cutter replacement and improves tire grooving productivity.

Abstract: A method and an apparatus for compensating a radial deflection and/or a lateral deflection in tire grooving wherein a cutter movement is controlled by a plurality of operating shafts and a desired pattern grooves are formed in a tire surface, wherein the radial deflection in a direction along diameter of the tire, which is supported by a tire supporting shaft, and/or the lateral deflection in a direction along diameter of the tire are detected before or during tire grooving, an a radially driving member, which moves a cutter in a direction along diameter of the tire, and/or a laterally driving member, which moves a cutter in a direction along width of the tire, are actuated in accordance with a reference program, and concurrently a movement of the radially driving member and/or a movement of the laterally driving member are adjusted in accordance with a correction program based on the detected deflection value in order to follow the radial deflection and/or the lateral deflection.