Abstract: A shift conversion catalyst layer is divided into at least two front and back stages. A first catalyst and a second catalyst are provided on the upstream side and the downstream side, respectively. The first catalyst has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas at a constant carbon monoxide concentration in the supplied reaction gas and a constant reaction temperature. The first catalyst is combined with the second catalyst such that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas in the second catalyst is lower than that in the first catalyst. Whereby, the conversion rate of a carbon monoxide concentration of a carbon monoxide shift conversion apparatus can be improved without increasing the used amount of a shift conversion catalyst.

Abstract: The present invention provides a tire balance measuring device capable of minimizing the influence exerted on a measured value due to an inclination of a lock shaft even when the lock shaft (fitted shaft) is inclined in a random direction at an angle created by a gap corresponding to a fitting allowance every time a tire is supplied with gas. The tire balance measuring device of this invention comprises a sensor for measuring the inclination of the lock shaft, and a computing unit for computing an amount of change in a unbalance of the tire from an output value received from the sensor after the tire is supplied with gas, and correcting a result of measuring a balance of the tire using the computed amount of change in the unbalance.

Abstract: A shift conversion catalyst layer is divided into at least two front and back stages. A first catalyst and a second catalyst are provided on the upstream side and the downstream side, respectively. The first catalyst has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas at a constant carbon monoxide concentration in the supplied reaction gas and a constant reaction temperature. The first catalyst is combined with the second catalyst such that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas in the second catalyst is lower than that in the first catalyst. Whereby, the conversion rate of a carbon monoxide concentration of a carbon monoxide shift conversion apparatus can be improved without increasing the used amount of a shift conversion catalyst.

Abstract: The present invention provides a tire balance measuring device capable of minimizing the influence exerted on a measured value due to an inclination of a lock shaft even when the lock shaft (fitted shaft) is inclined in a random direction at an angle created by a gap corresponding to a fitting allowance every time a tire is supplied with gas. The tire balance measuring device of this invention comprises a sensor for measuring the inclination of the lock shaft, and a computing unit for computing an amount of change in a unbalance of the tire from an output value received from the sensor after the tire is supplied with gas, and correcting a result of measuring a balance of the tire using the computed amount of change in the unbalance.

Abstract: A pneumatic circuit whereby small amounts of variations in pneumatic pressure in a tire occurring during tire testing can be adjusted in a short time. The pneumatic circuit includes an air supply source which generates compressed air to be supplied to a tire retained in a tire testing device; a pressure regulating valve which regulates the pressure of the compressed air generated; a discharge/supply valve provided downstream of the pressure regulating valve and by which compressed air is supplied to, or discharged from, the tire; a pressure detection unit provided downstream of the discharge/supply valve and which detects the tire pressure inside the tire; and a volume adjustment mechanism provided between the pressure regulating valve and the tire and which increases or decreases the volume of compressed air in an airflow path between the tire and the pressure regulating valve, as well as in the tire.

Abstract: A rim mounting device configured in such a manner that, even if a permanent magnet breaks due to impact produced during mounting thereof by magnetic attraction, the rim mounting device can be handled easily after the breakage of the permanent magnet. The rim mounting device is provided to a tire testing device having a spindle for rotating a tire and is adapted that a rim is mounted to the tip of the spindle. The rim mounting device is provided with: a rim mounting section provided to the tip of the spindle, having a rim mounting surface capable of making contact with the rim, and having mounting recesses formed in the rim mounting surface so as to be arranged side by side; permanent magnets inserted in the mounting recesses, respectively, and generating magnetic force for attracting the rim to the rim mounting surface; and scatter suppressing members.

Abstract: A pneumatic circuit whereby small amounts of variations in pneumatic pressure in a tire occurring during tire testing can be adjusted in a short time. The pneumatic circuit includes an air supply source which generates compressed air to be supplied to a tire retained in a tire testing device; a pressure regulating valve which regulates the pressure of the compressed air generated; a discharge/supply valve provided downstream of the pressure regulating valve and by which compressed air is supplied to, or discharged from, the tire; a pressure detection unit provided downstream of the discharge/supply valve and which detects the tire pressure inside the tire; and a volume adjustment mechanism provided between the pressure regulating valve and the tire and which increases or decreases the volume of compressed air in an airflow path between the tire and the pressure regulating valve, as well as in the tire.

Abstract: A rim mounting device configured in such a manner that, even if a permanent magnet breaks due to impact produced during mounting thereof by magnetic attraction, the rim mounting device can be handled easily after the breakage of the permanent magnet. The rim mounting device is provided to a tire testing device having a spindle for rotating a tire and is adapted that a rim is mounted to the tip of the spindle. The rim mounting device is provided with: a rim mounting section provided to the tip of the spindle, having a rim mounting surface capable of making contact with the rim, and having mounting recesses formed in the rim mounting surface so as to be arranged side by side; permanent magnets inserted in the mounting recesses, respectively, and generating magnetic force for attracting the rim to the rim mounting surface; and scatter suppressing members.