US1752675A - Kiln roller - Google Patents

Description

April 1930- o. E. LARSON 1,752,675

KILN ROLLER Filed May 17, 1927 Oscar E. L arson I N VEN TOR.

Patented Apr. 1, 1930 UNITED STATES PATENT OFFICE OSCAR E. LARSON, LANCASTER, OHIO, ASSIGNOB TO THE HEBMANN MANUFAC- TUBING COMPANY, OF LANCASTER, OHIO, A CORPORATION 01! OHIO KILN ROLLER Application filed May 17, 1927. Serial No. 192,127.

My invention relates to kiln rollers of the t pe generally used in a kiln for drying long at sheets of material, such as thin sheets of wood, fiber, artificial lumber made from va- 5 rious material, composition or the like, and, more particularly, to an improvement in the means for attaching a bearing shaft to the ends of the kiln rollers.

The roller drier in general use at this time consists of a lon enclosed insulated box,

heated by some we 1 known means, the material to be dried being passed through continuously, over or between driven rollers, and the moisture being removed by a suitable ventilation system. The rollers in such a drier may be of any number and have, preferably, been formed with bearing shafts on the ends thereof, these shafts running in ball, roller graphite or any other kind of hearing. The 2 rollers have either been solid or hollow, and in both cases, have had gudgeons machined to fit into openings in the ends of the rollers. This required accurate machining of the gudgeons and accurate machining and allgnment of the openings in the ends of the rollers. Furthermore, such rollers have been heavy, requiring more power to operate a series of rollers, such as used in a drier kiln, and have been costly to manufacture due to the time and labor necessary to accurately machine and align each roller.

The primary object of my invention is to provide a much lighter roller wherein very little time and labor is necessary to prepare the roller for operation and much less power is necessary to operate a series of these rollers.

Other and further objects of my invention will appear in the following description and the preferred embodiment of my invention will be seen in the accompanying drawings wherein similar characters of reference designate corresponding parts and wherein:

Figure 1 is a longitudinal cross-sectional view of a kiln roller constructed in accordance with the idea disclosed in my invention.

Figure 2-is an end view taken on the line 2-2 of Figure 1.

Figure 3 is a perspective view of the end of a kiln drier showing the kiln rollers mounted therein and the means for operating the same.

With reference to Figure 1 of the drawngs, I have shown a kiln roller constructed 1n accordance with my invention. This roller 15, preferably made of tubing, as shown-at 1, such as boiler or seamless tubing, although not llmited thereto. Stampings are also shown that may be of any desired number and are, preferably, of the form shown at 2 and 3, these stampings being adapted to be disposed on the shaft 4 by a press fit. After the stampings have been pressed onto the shaft 4, the whole assembly is inserted into the open end of the tube 1. Before insertion of the assembly, the tube 1 is heated to a temperature that will allow the assembly to be lnserted into the end of the tube so that, on cooling, the assembly will be held by a shrink fit between the tube and the stamping. Before the assembly of the shaft 4 and the stampings 2 and 3 have been laced in the tube, the stampings are prefera ly welded to the shaft by spot welding or any other well known means of welding and after the assembly has been inserted into the tube the stampings may be welded to the tube in the same manner. The stampings need only be machined on the outer surfaces thereof, the inner surfaces not contacting with any working part of the roller or tube and the stamp-,

ings are made of a material flexible enou h to conform to the variations in size of t e tube thus tending to make the tube run true. In Figure 2, I have shown a View of the end of the roller as it will look with the gudgeon assembly and bearing shaft inserted therein.

I do not wish to belimited to any specific sequence or manner of inserting the stampings and the shaft into the tube since the stampings and shaft may be inserted into the tube in the most convenient manner or the most convenient sequence of parts.

A perspective view of the end of a drier kiln showing the kiln rollers 1 mounted therein and the means for operating the same is shown in Figure 3. The rollers are mounted in a frame work of steel, cast iron, or some other suitable material, which framework is, preferably arranged for expansion and contraction. The rollers have sprockets mounted on the ends thereof the sprockets being connected and actuated by a series of chain belts 6. The chain belts are connected at one end to a suitable power unit 7 which power unit, through the system of gearin just described, simultaneously rotates all 0 the rollers to advance the material thereon in the same direction and at the same speed. There may be any number of rollers and these rollers may be spaced to form a series of decks as shown in Fi re 3.

It is obvious that it would be a task requirin much time and labor and an operation invo ving much expense to equip a drier kiln with rollers requirin the ends of each roller and the gudgeons w ich are to be inserted therein to be accurately aligned and machined. Therefore, it Wlll be obvious by referring to the previous description that I have provided a roller that will eliminate, in a large part, these previous disadvantages since the gudgeons need no machining and have the required flexibility to make them conform to the variations in the tube and shaft thus automatically aligning the roller and makin the roller run true.

One of t e important features of my invention arises from the fact that the legs in; termediate the shaft of the tube for connecting the two together is of stamped material. Because of this, it is possible to provide an absolutely true mounting of the tube upon the shaft owing to the fact that the exterior and the interior of the stamping may be made absolutely true without machining.

Having thus described my invention, what I claim is:

1. In a roller structure, a bod portion having a hollow end, a stub shaft orming a journal for such body portion and a plurality of spaced resilient members U-shaped in cross-section for embracing said journal and fitting within the hollow end of the body portion to hold said stub shaft in such hollow end.

2. In a roller structure a body portion having a hollow end, a stub shaft formin a journal for such body portion and a plura t of stamped resilient annular members J shaped in cross-section embracing said journal and fitting within said tube to hold said stub shaft in such hollow end.

In testimony whereof I, hereby, aflix my signature.

OSCAR E. LARSON.

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