Master disk, master disk mounting method, and master disk removal method

Abstract

A master disk which simulates a tire and is used at the time of confirmation or correction of measurement accuracy of a geometry measuring device for measuring the surface shape of a tire, of a tire testing machine, includes: a simulated tire section simulating a tire; a lower tubular section having a cylindrical shape, in which the tip side thereof is connected to the lower end side of the simulated tire section so as to be coaxial with the simulated tire section and a guide surface inclined in a tapered shape so as to have a larger diameter toward the base end side is formed on the base end side of an inner peripheral surface; and a neck section and a flange section which are provided on the upper end side of the simulated tire section and detachably engaged with test rim moving and exchanging means of a tire holding device of the tire testing machine.

1 . A master disk which simulates a tire and is used at the time of confirmation or correction of measurement accuracy of a geometry measuring device for measuring a surface shape of a tire, of a tire testing machine,
 the master disk being able to be mounted on and removed from automatic exchange means.   
     
     
         2 . The master disk according to  claim 1 , comprising:
 a simulated tire section simulating a tire;   a first tubular section having a cylindrical shape, in which a tip side thereof is connected to one end side in an axial direction of the simulated tire section so as to be coaxial with the simulated tire section and a guide surface inclined in a tapered shape so as to have a larger diameter toward a base end side is formed on the base end side of an inner peripheral surface; and   an engaging member which is provided on the other end side in the axial direction of the simulated tire section and detachably engaged with the automatic exchange means.   
     
     
         3 . The master disk according to  claim 2 , wherein the engaging member includes
 a neck section disposed on the other end side in the axial direction of the simulated tire section so as to be coaxial with the simulated tire section, and   a flange section coaxially provided at the neck section and having a larger diameter than the neck section.   
     
     
         4 . The master disk according to  claim 3 , wherein the engaging member further includes
 a second tubular section having a cylindrical shape, in which a base end side thereof is connected to the other end side in the axial direction of the simulated tire section so as to be coaxial with the simulated tire section, and   a lid section which is provided on a tip side of the second tubular section and on which the neck section is mounted.   
     
     
         5 . The master disk according to  claim 2 , wherein the automatic exchange means is test rim moving and exchanging means of a tire holding device of the tire testing machine. 
     
     
         6 . A master disk mounting method which is a method of mounting the master disk according to  claim 5  on a spindle of a tire holding device of a tire testing machine, comprising:
 transferring the master disk such that a base end side of the first tubular section of the master disk is fitted on the spindle, after the test rim moving and exchanging means of the tire holding device of the tire testing machine is engaged with the engaging member of the master disk so as to hold the master disk placed on a stocker frame of a rim stocker of the tire testing machine. 
 
     
     
         7 . A master disk removal method which is a method of removing the master disk according to  claim 5  mounted on a spindle of a tire holding device of a tire testing machine from the spindle, comprising:
 transferring the master disk such that a base end side of the first tubular section of the master disk is placed on a stocker frame of a rim stocker of the tire testing machine, after the test rim moving and exchanging means of the tire holding device of the tire testing machine is engaged with the engaging member of the master disk so as to hold the master disk mounted on the spindle. 
 
     
     
         8 . A tire shape inspection method comprising repeatedly performing:
 a test rim mounting step of transferring a test rim placed on a stocker frame of a rim stocker of a tire testing machine by test rim moving and exchanging means of a tire holding device of the tire testing machine such that the test rim is held by the tire holding device;   an inspection step of performing inspection of a tire by holding the tire with the test rim of the tire holding device and measuring a surface shape of the tire with a geometry measuring device;   a test rim removal step of transferring the test rim of the tire holding device by the test rim moving and exchanging means of the tire holding device such that the test rim of the tire holding device is placed on the stocker frame of the rim stocker, after the inspection step is performed by a specified number of times or for a specified period of time;   a master disk mounting step of mounting a master disk on the spindle of the tire holding device from the stocker frame of the rim stocker by transferring the master disk such that a base end side of a first tubular section of the master disk is fitted on the spindle, after a test rim moving and exchanging means of the tire holding device of the tire testing machine is engaged with an engaging member of the master disk so as to hold the master disk placed on a stocker frame of a rim stocker of the tire testing machine, with respect to the tire holding device from which the test rim is removed;   a confirmation and correction step of performing confirmation or correction of measurement accuracy of the geometry measuring device by measuring the master disk mounted on the spindle of the tire holding device with the geometry measuring device; and   a master disk removal step of removing the master disk mounted on the spindle of the tire holding device from the spindle by transferring the master disk such that a base end side of the first tubular section of the master disk is placed on a stocker frame of a rim stocker of the tire testing machine, after the test rim moving and exchanging means of the tire holding device of the tire testing machine is engaged with the engaging member of the master disk so as to hold the master disk mounted on the spindle and transferring the master disk to the stocker frame, after the confirmation and correction step is performed.