JPH0170530U

JPH0170530U -

Info

Publication number: JPH0170530U
Application number: JP16589487U
Authority: JP
Priority date: 1987-10-29
Filing date: 1987-10-29
Publication date: 1989-05-11

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例において縮径時の要
部の断面図、第２図は第１図とは位相が１８０度
異なる部分の拡径時における断面図である。Ｇ：一次成形タイヤ、Ｇａ：ビード部、１：主
軸、２：スリーブ、３：外側フランジ、９：スリ
ーブ２に固定されたリング状ピストン、１０：ス
リーブ２に対して摺動自在の環状流体シリンダ、
１１：圧縮コイルスプリング、１２：揺動レバー
、１３：連結ピン、１４：棒状リンク、１４ａ，
１４ｂ：連結ピン、１５：セグメント状ビード保
持部材、１６：ブラダ、１７：当て金。 FIG. 1 is a cross-sectional view of a main part of an embodiment of this invention when the diameter is reduced, and FIG. 2 is a cross-sectional view of a portion whose phase differs by 180 degrees from that in FIG. 1 when the diameter is expanded. G: Primary molded tire, Ga: Bead portion, 1: Main shaft, 2: Sleeve, 3: Outer flange, 9: Ring-shaped piston fixed to sleeve 2, 10: Annular fluid cylinder slidable with respect to sleeve 2 ,
11: Compression coil spring, 12: Swing lever, 13: Connection pin, 14: Rod-shaped link, 14a,
14b: connecting pin, 15: segmented bead holding member, 16: bladder, 17: stopper.

Claims

[Scope of utility model registration request]

A large number of segment-shaped bead holding members for holding the inner side of the bead portion of the primary formed tire are arranged in a ring shape around the main shaft, and the bead holding members are moved in the radial direction to expand and contract the diameter. In the radial tire forming drum, a flange is provided protruding from the axially outer end of the sleeve fitted to the main shaft, and a large number of swing levers corresponding to the segment-shaped bead holding members are provided on the outer periphery of the flange. an axially inner end of an annular fluid cylinder which is fitted onto the outer surface of the sleeve and is slidable in the axial direction; A drum for forming a radial tire, characterized in that the tip of the swinging lever is connected with a pin by a rod-shaped link.