Device and method for manufacturing cylindrical member

Patent metadata

Field	Value
Publication number	US-10668680-B2
Application number	US-201716333978-A
Country	US
Kind code	B2
Filing date	Sep 1, 2017
Priority date	Sep 16, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A device and method are provided for manufacturing a cylindrical member. By inserting an edge of the forming drum on one side in a width direction between an arm and a projection of a holding unit disposed opposite one another and bringing the arm and the projection closer together in a direction in which a separation distance is reduced, a first end of the rubber member disposed on the outer circumferential surface of the forming drum is disposed between the arm and the projection, pressed by the arm, and held on the outer circumferential surface, and a holding unit attached to the forming drum is rotated about a drum shaft together with the forming drum; and the rubber member is wound around the outer circumferential surface and formed into a cylindrical shape.

First claim

The invention claimed is:

1. A device for manufacturing a cylindrical member, comprising:
a forming drum comprising an outer circumferential surface around which an unvulcanized band-like rubber member is wound; and
a holder comprising a holding unit, the holding unit holding a first end portion of the band-like rubber member that corresponds to a winding starting point on the outer circumferential surface and is detachable from the forming drum; wherein
the device has an advancing/withdrawing mechanism which moves the holding unit toward and away from the forming drum, and the holding unit is detachable with respect to the advancing/withdrawing mechanism;
the holding unit comprises an arm and a projection portion disposed opposite one another and an approach mechanism that brings the arm and the projection portion closer together;
when the holding unit is attached to the forming drum, an edge portion of the forming drum on one side in a width direction is inserted between the arm and the projection portion, by moving the holding unit toward the forming drum by the advancing/withdrawing mechanism, the first end portion disposed on the outer circumferential surface is disposed between the arm and the projection portion brought closer together in a direction in which a separation distance is reduced, and the first end portion is pressed by the arm and held on the outer circumferential surface; and
the holding unit, removed from the advancing/withdrawing mechanism, is rotatable about a drum shaft together with the forming drum.

2. The device for manufacturing a cylindrical member according to claim 1 , further comprising a stopper disposed between the arm and the projection portion that ensures a preset minimum separation distance between the arm and the projection portion.

3. The device for manufacturing a cylindrical member according to claim 2 , wherein the approach mechanism is a biasing member that constantly biases the arm and the projection portion in a direction in which separation distance is reduced.

4. The device for manufacturing a cylindrical member according to claim 3 , wherein the forming drum comprises an expanding shaping bladder on the outer circumferential surface.

5. The device for manufacturing a cylindrical member according to claim 4 , wherein
a contact surface where the arm presses the first end portion is formed in an identical shape to a surface shape of the pressed first end portion or is a detachable attachment formed in an identical shape to a surface shape of the pressed first end portion.

6. The device for manufacturing a cylindrical member according to claim 1 , wherein the approach mechanism is a biasing member that constantly biases the arm and the projection portion in a direction in which separation distance is reduced.

7. The device for manufacturing a cylindrical member according to claim 1 , wherein the forming drum comprises an expanding shaping bladder on the outer circumferential surface.

8. The device for manufacturing a cylindrical member according to claim 1 , wherein
a contact surface where the arm presses the first end portion is formed in an identical shape to a surface shape of the pressed first end portion or is a detachable attachment formed in an identical shape to a surface shape of the pressed first end portion.

9. A method for manufacturing a cylindrical member, comprising:
holding a first end portion of an unvulcanized band-like rubber member corresponding to a winding starting point on an outer circumferential surface of a forming drum by attaching a holding unit to the forming drum, the holding unit detachable from the forming drum;
winding the band-like rubber member around the outer circumferential surface and forming the band-like rubber member into a cylindrical shape by rotating the forming drum, with the first end portion held; wherein
by inserting an edge portion of the forming drum on one side in a width direction between an arm and a projection portion of the holding unit disposed opposite one another by attaching the holding unit to an advancing/withdrawing mechanism which moves toward and away from the forming drum, and by moving the holding unit toward the forming drum by the advancing/withdrawing mechanism and by bringing the arm and the projection portion closer together in a direction in which a separation distance is reduced, the first end portion disposed on the outer circumferential surface is pressed by the arm and held on the outer circumferential surface, and the holding unit is attached to the forming drum; and
the holding unit, removed from the advancing/withdrawing mechanism, is rotated about a drum shaft together with the forming drum.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Furubayashi Yuki

Classifications

• B29D30/244 Primary

  for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses (mechanisms for folding layers around cores or blads per se B29D30/32) · CPC title

• B29D30/26 Primary

  Accessories or details, e.g. membranes, transfer rings · CPC title

• B29D2030/2685

  by using mechanical means, e.g. jaws, grippers, pressing bars · CPC title

• B29D2030/2614

  Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies · CPC title