Kabushiki Kaisha Kobe Seiko Sho

Masayoshi Okamoto

Yoshimata Maikuma

Atsuaki Iwama

Toshikazu Tanaka

Yuji Oikawa

Katsunobu Hagiwara

Taiji Orimo

Toshikatsu Nonaka

A device for clamping upper and lower rims to the respective upper and lower spindles of a tire uniformity machine. The device includes wedge component having an outer surface contacting the inner surface of a rim and a tapered inner surface contacting a similarly tapered surface of the spindle, is displaced axially relative to the tapered surface of the spindle. Such axial displacement is translated into a radial displacement of the wedge component as a consequence of the wedge effect between the tapered surface of the wedge component and tapered surface of the spindle. If the wedge component is displaced radially outward, its outer surface pushes against the inner surface of the rim and the rim is clamped through the frictional force between the inner surface of the rim and the outer surface of the wedge component.

Rim clamping device for a tire uniformity machine

A rim gap setting device in a tire uniformity inspecting machine include upper and lower rims for mounting a tire, which are vertically movably fitted on opposed ends of upper and lower spindles, respectively. Upper and lower hydraulically locking devices are provided for locking the upper and lower rims from the inner circumferences thereof, and are mounted around the upper and lower spindles, respectively. Upper and lower hydraulically engaging devices are mounted on the upper and lower spindles and can be radially retreated by being hydraulically interlocked with the upper and lower hydraulically locking devices to be thereby engaged with the upper and lower rims on the locking operation of the upper and lower hydraulically locking devices, respectively.

Device for setting gap between rims in tire uniformity inspecting machine

A method of setting a distance between upper and lower rims mounted on upper and lower spindles in a tire uniformity machine. The upper and lower rims under a superposed condition are first laid on an arm. Then, the arm is lifted or lowered until the upper rim reaches a desired upper position on the upper spindle. Then, the upper rim is fixed from an inner circumference thereof to the upper spindle at the desired upper position by an upper locking device. Then, the arm is lowered until the lower rim reaches a desired lower position on the lower spindle. Then, the lower rim is fixed from an inner circumference thereof to the lower spindle at the desired lower position by a lower locking device. Accordingly, a distance between the upper and lower rims can be set easily and quickly in a simple operation without using a spacer or the like.

Method and device for setting a distance between rims in tire uniformity

A method for correcting errors of measurement due to variations in tire pressure in a tire uniformity inspecting operation, wherein a tire is inflated and rotated between a pair of rims and a load wheel is pressed against the tire and a radial force variation of said tire is measured, including: detecting a deviation of actual air pressure of the tire from a predetermined measuring pressure level to determine a correction coefficient; calculating a value of tire uniformity from the measured value of radial force variation according to the predetermined measuring pressure level; multiplying the calculated value of uniformity by the correction coefficient to compensate for any erroneous component due to a variation in the tire pressure.

Method and system for correcting errors of measurement in tire

A method for correcting errors of measurement in a tire uniforming inspecting machine having a pair of upper and lower rims engageable with bead portions of a tire for gripping the tire securely for rotation at a predetermined position and a load wheel engageable with the circumference of the tire at one side thereof to check for variations in the radial force, including: measuring radial runout of the rims and/or load wheel to obtain an erronous deflection signal indicating the amount of radial runout of the rims and/or load wheel; obtaining and storing a primary harmonic component of the erroneous deflection signal; measuring variations in radial force of a tire rotated on the rims to obtain a radial variation signal for a period of one revolution of the tire; multiplying the erroneous deflection signal by a spring constant of the tire to obtain an erroneous variation signal; and subtracting the erroneous variation signal from the radial variation signal to eliminate influence of radial runout of the rims and/or load wheel from the measured value of the radial force of the tire.

Growing community of inventors

Kakogawa, Japan

Masayoshi Okamoto