TIRE BUILDING DRUM AND TIRE BUILDING METHOD
First Claim
1. A tire building drum comprising:
- a pair of bead lock means adapted to be displaced toward and away from each other and thereby expanded or contracted;
carcass band folding-back means, positioned adjacent to the bead lock means, respectively; and
a center shaft for supporting these means;
wherein said tire building drum further comprises at least one core body at an axial inside of said bead lock means, said core body comprising a plurality of sheets of rigid support members toroidally disposed and adapted to be displaced and thereby expanded or contracted.
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Accused Products
Abstract
Tire building drum and tire building method, capable of assembling tire component members with high accuracy. A tire building drum is used, which includes at least one core body, which is disposed at an axial inside of a pair of bead lock means, and which comprises a plurality of sheets of rigid support members disposed in a toroidal shape and adapted to be displaced and thereby expanded or contracted. Bead cores are locked by the bead lock means, respectively, and a center portion of a carcass band is bulged while displacing the bead lock means close to each other. Back side portions of the carcass band are folded to radial outsides around the bead cores, respectively. The core body is then radially expanded to the maximum diameter while locking the bead cores, and tire component members are assembled onto the radially expanded core body.
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Citations
30 Claims
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1. A tire building drum comprising:
- a pair of bead lock means adapted to be displaced toward and away from each other and thereby expanded or contracted;
carcass band folding-back means, positioned adjacent to the bead lock means, respectively; and
a center shaft for supporting these means;
wherein said tire building drum further comprises at least one core body at an axial inside of said bead lock means, said core body comprising a plurality of sheets of rigid support members toroidally disposed and adapted to be displaced and thereby expanded or contracted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- a pair of bead lock means adapted to be displaced toward and away from each other and thereby expanded or contracted;
Specification