Ply turn-up means in a tire building machine
AssigneeThe B. F. Goodrich Company
InventorDonald B. Ruppel
Life of this patent
Estimating the term…
Abstract
A ply turn-up and stitching device for use with a tire building drum wherein the building drum supports a tire carcass thereon with ply stock or fabric wound thereon and wherein the fabric extends beyond the edges of the tire building drum. Separate means is provided to place tire beads onto the respective edges of the building drum. The ply turn-up device upon actuation moves a profiled cam to a predetermined position adjacent the drum and then actuates the turn-up device to perform a turn-up of the marginal edges of the ply stock or fabric over the tire beads followed by a stitching of the remaining fabric onto the tire carcass to complete the operation. On return of the ply turn-up device to its remote position, it carries the profiled cam away from the tire building drum to facilitate the removal of the drum.
Claims6
In a tire building machine, a tire building drum having axially disposed support ends, a pair of support members on either side of said machine, a spindle mounted in each of said support members, one of said spindles moveable axially in one of said support members, the other one of said spindles being secured to the other one of said support members, ply turn-up means mounted on each of said support members for axial movement to and from said tire building drum, a first bracket means connected to said one spindle for movement therewith, a second bracket connected to said other one of said spindles, power operated means mounted on each of said brackets and operatively connected to said ply turn-up means for moving said ply turn-up means, cam means journaled on each of said spindles for movement axially on said spindles to and from said tire drum, power drive means interconnecting said one support member to said first bracket means for selective actuation for moving said first bracket means and said one spindle to chuck up said tire drum in cooperation with said other stationary spindle, a plurality of circumferentially spaced arms pivotally mounted on said ply turn-up means, said arms extending axially outwardly around each of said cam means to define a set of arms, each set of arms having an annular expansible and rollable member on the outboard end thereof, a cam follower on each of said arms and contacting said cam means, a spring member encompassing each set of arms for biasing said arms radially inwardly and being operative to move said cam means axially to and from said drum with said tire ply stock turn-up means, each of said cam means being moveable axially relative to said turn-up means, each of said spindles having stop means for limiting the axial movement of said cam means during axial movement of said turn-up means, and said power operated means operative upon actuation for moving said turn-up means axially toward said tire drum and operative to effect a predetermined radial movement to said expansible and rollable member and a stitching of the edge of ply stock on said drum upon contact of said cam means with said stop means.
In a tire building machine of the multiple station type wherein tire building drums are conveyed from station to station for successive tire building operations, each of said tire building drums having a cylindrical surface with spaced annular side edges and a central shaft, with such cylindrical surface receiving ply stock that extends beyond said side edges and beyond a bead core that is positioned at said side edges on said drum, said machine having a pair of spaced support members mounted at one station, a ply turn-up device mounted on each one of said support members for axial movement to and from said tire building drum, a drum support spindle mounted on each one of said support members, each spindle having an inner end portion for chucking said central shaft, an axially moveable cam means mounted on each of said spindles for movement to and away from said tire drum with said spindle as well as moveable axially relative to said spindles, a stop means on each of said spindles limiting the axial movement of said cam means toward said drum, each of said ply turn-up devices having a plurality of circumferentially spaced arms extending axially toward said drum forming a set of arms, each of said arms having a cam follower operatively contacting said cam means, each set of arms having an annular expansible and rollable member, spring means circumferentially encompassing each of said set of arms for biasing said arms radially inwardly to have said cam followers in contact with said cam means and operative to move said cam means axially with said ply turn-up device as limited by said stop means, and power operated means connected to each of said ply turn-up devices for moving said turn-up devices along with said cam means toward said tire drum as limited by said stop means to effect upon contact of said stop means by said cam means a predetermined radial movement to said expansible and rollable member effecting a folding of the ply stock over bead cores that extends beyond said side edges over bead cores followed by a smoothing out of said ply stock on said side edges of said drum.
In a tire building machine having a tire drum with axially disposed end portions, a pair of support members on either side of said machine, a spindle mounted in each of said support members for supporting said tire building drum, ply turn-up means mounted on each of said support members for axial movement to and from said tire building drum, power operated means mounted on said machine and operatively connected to said ply turn-up means for moving said ply turn-up means, cam means journaled on each of said spindles for movement thereon to and from said tire drum, each of said ply turn-up means having a plurality of circumferentially spaced arms, said arms extending axially outwardly around each of said cam means to define a set of arms, each set of arms having an annular expansible and rollable member on one end of said arms, a cam follower on each of said arms and contacting said cam means, a spring member encompassing each set of arms for biasing said arms radially inwardly, said spring member being operative to move said cam means axially to and from said drum with said tire ply stock turn-up means, each of said cam means being moveable axially relative to said turn-up means, each of said spindles having stop means for limiting the axial movement of said cam means during continued axial movement of said turn-up means, said power operated means operative upon actuation for moving said turn-up means axially toward said tire drum to effect a predetermined radial movement to said expansible and rollable member and a stitching of the edge of ply stock on said drum upon contact of said cam means with said stop means and said cam means being cone shaped to provide a radially outwardly tapering surface that effects a radial outward sweeping turn-up motion to each of said arms and to said annular expansible and rollable member followed by an axial motion to effect completion of said turn-up and stitching.
Dependencies are inferred from the claim text.