Pressure device for tire constituent member and tire forming apparatus

A pressure device for a tire constituent member in order to pressurize the tire constituent member which is arranged on a forming drum, the device comprising:

• a shaft member;
• a plurality of pressure rolls each of which is displaced around the shaft member and pressurizes the tire constituent member;
• an inside space formed around the shaft member inside of the plurality of pressure rolls;
• a plurality of supporting parts each of which supports a respective pressure roll of the plurality of pressure rolls rotatably from inside of the respective pressure roll and is displaced integrally with the respective pressure roll;
• a plurality of pressure holes formed in a plurality of points of the shaft member corresponding to positions of the plurality of pressure rolls so as to extend in a pressurization direction for the tire constituent member from inside of the shaft member;
• a plurality of moving members each of which moves in a respective pressure hole of the plurality of pressure holes and projects in the pressurization direction for the tire constituent member from the respective pressure hole so as to pressurize a respective supporting part of the plurality of supporting parts fixed to a tip end thereof and the respective pressure roll, and
• a plurality of supply pipes arranged in the inside space around the shaft member so as to each supply a pressurizing medium for pressurizing a respective moving member of the plurality of moving members into the respective pressure hole.