US1636056A - Collapsible tire-building form - Google Patents

Description

July 19 1927.

F. JOHNSON COLLAPSIBLE; TIRE BUILDING FORM Filed Marcfi so} 1927 2 Sheets-Sheet 1 INVENTOR fRFlN/f -L. U'UHNSU N Bk A TTORNEY) July 19, 1927. 1,636,055

F.L. JOHNSON 'COLLAPSIBLE THE BUILDING FORM Filed March so. 1927 2 'Sheets Sheet z I N VEN TOR.

ERF NK L. 'L'fDHN-S UN BY fl 7 iy ciur f ATTORNEY} Patented "Jul 19, 1927'.

' UNITED, STATES;

1,636,056 PATENT OFFICE.

I mam: L. .romvsou. or AKRbN, onro;

COLLAiSIIBLE TIRE-BUILDING 101m.

Application filed March so, 1927. Serial no. 1 29,1516,

The invention relates to the art of tire manufacture and particularly, to improved collapsing mechanism for use with collapsible tire building forms or drums. The invention is particularly-adapted and intended for use with drums of the type and form used in the similar facility in reassembling the drum.

The mechanism shownherein is particularly adapted for this purpose, the weight of the drum being used as the motive power for collapsing the sections or parts thereof.

The showing in the description and drawings is for the purpose of explaining andillustrating the invention and is not intended to be restrictive of the scopeor extent of the invention, as changes or modifications of the invention may be suggested to those 'skilled in this art. The claims are, therefore, to be construed in the light of the prior art and are intended to'cover such changes or improvements on the invention as may fall within a fair interpretation of their language and intent.

In the drawings, in which the referred embodiment of the inventionis il ustrated:

Figure 1 is a side elevation of a drum havingthe im roved collapsing mechanism adapted to an associated therewith;

Figure 2 is a vertical section on the line 2-2 of Figure 1; and

Figure 3 is a cross section on the line 3-3 f F' 1. m o lgure The form or drum comprises a plurality of sections, certain of which are hinged together or to a common actuating means, and a key sections which, with the hinged sections, completes the form orv drum proper when the sections are in assembled or circular form. The main body ofthe form, which is constituted by the hinged sections, is freely, movable. by its own weight, toward and from the center or axis of the form. and the hinged sections are connected to the center of the form so that as the body moves toward the" axis, the hinged sections are rocked toward the center of the form. Broadly described, the body of the form may consist of a number of movable sections which are actuated toward and from the genlter of the core by the movement of the In the form shown, the drum com rises two sections 2 and 3, which may be esignated as the movable or hinged sections, and

a stationary or key section 4 which'occupies the position-between the ends of the movable- The swinging or hinged sections sections. are provided with inwardly projectin webs or lugs 5, to which are rigidly secure links 6, the ends of which project toward one another and are pivoted on bolts to the upper end of a carrier or slide 8 which is movable in a guideway 10 formed in a central sup:

porting plate or chuck 11. The rear face of the chuck is formed with a socket 12 in which the drum supporting and rotating shaft 14 is received.

The central supporting plate is provided with parallel. radial arms 15, to the outer ends of which are secured stra s 16, which are, in turn, secured to a we or lug 20 formed on the key section 4 so that the latter is rigidly supported at a fixed distance from the core axis determined by the location of the shaft 14-.

To the front of the chuck 11 is secured a cover plate 21 which retains the slide 8 in itsguideway, and mounted in .the cover plate, in position to enter a socket 24 in. the slide, is a lock pin 25. The lock pin has a stem 28 which is received and guided within a barrel 29 fastened to the cover plate, a spring 30 surrounding the stem within the barrel and urging the lock pin inwardly. When the form is in the position shown in Figure 1. with the key section downwardly, and the lock pin is withdrawn, the slide 8 will drop through the guide carrying the hinged sections with it and also carrying the tire which has been'built upon it away from the key section. The slide will move downwardly until its end strikes the lug 20, a

rubber bumper 32 being mounted on the lug carried in webs 39 extending from the chuck,

plate. It will be observed that as the form body drops as shown, the links 35 will act to rock the sections 2 and 3 inwardly so that they occupy the position shown in dotted lines in Figure 1. It will also be noted that provision must be made to allow the ends of the swingingsections to clear the ends of the stationary section-before the linkstake effect. This is accomplished by the provision of slots 40 at the ends of the links where the pins 38 pass through the links.

When the tire has been removed from the drum'in collapsed position and it is desired to re-erect the drum for the building of further tires, the drum is revolved through 180, the pin 25 bein withdrawn,-whereupon the drum-body wi lfall back into place, the swinging sides expand and the pin may be inserted in place. To stop the movement of the drum body at its inward limit of movement a pin or stop 42 is attached to the Y slide, being received in sockets 43 on the cover-plate and chuck body. Rubber sleeves 44 surround the pin and cushion the movement in that direction.

The operation of the device will have been readily understood from the description and no further statement thereon is necessary. It will be noted that an extremely simple, easily operated and effective device has been obtained, which will operate to collapse the drum without loss of time or effort on the the carrier, and connections to the movable. sections adapted to move them inwardly upon movement of the carrier toward the axis of the form.

2. A collapsible tire building form, comprising a'plurality of sections, one of the sections being stationary, a carrier, means to retain the carrier in its outermost position, a

guideway in which the carrier is slidable,

. swin in sections ivoted on the carrier and links connected to the swinging sections and adapted to swing them inwardly upon movement of the carrier toward the axis of the form. a

A collapsibletire buildin form, comprising a supporting plate an a plurality of sections, one of the sections being rigidly toward the axis of the form upon movementof the slide toward the axis of the form.

4. A collapsible tire building form, com-- prising a supporting plate and a plurality of sections, one of the sections being rigidly supported by the plate, a guideway in the plate, a slide movable in the guideway, oertain of the sections being movably mounted upon the slide, and connections between the ends of the movable sections and the supporting plate adapted to move the sections toward the axis of the form upon movement of the slide toward the axis of the form, the connections providing for lost motion at the commencement of the movement of the slide.

5, A collapsible tire buildin form, comprising a supporting plate and a plurality of sections, one otthe sections being rigidly "attached directly .to the plate, a guideway in the plate, a slide movable in the guideway, certain ofthe sections being pivoted upon the slide, and connections, having provision for lost motion, extending from the ends of the pivoted sections to the-supporting plate adapted to rock the swinging sections toward the axis of the form upon movement of the slide in the guidewa 6: A collapsible tire building form, comprising a supporting plate and a plurality of sections, one of the sections being rigidly. attached directly. to the plate, a guideway in the plate, a slide movable in the guideway, certain of thesections being pivoted upon the slide, connections, having provision for lost motion, extending from the ends of the pivoted sections to the supporting plate adapted to rock the swinging sections toward the axis of the form upon movement of the slide in the guideway, and a lock to hold the slide at its outer limit of movement.

FRANK L. JOHNSON.

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