US1075191A - Pressure-roll for planers. - Google Patents

Description

A. L. BYTHER.

PRESSURE ROLL FOR PLANERS.

APPLICATION FILED JULY 27, 1911.

Patented Oct. 7, 1913.

2 SHEETS-SHEET 1.

\\ u. .11 PLANOGRAIH C0,, WASHINGTON. n, c.

Patentd Oct. 7, 1913.

2 SHEETSPSHBET 2.

A. L. BYTHER. PRESSURE ROLL FOR PLANERS.

APPLICATION FILED JULY 27,1911. 1,075; 9 1.

'iiill ALFRED I. BYTHER, OF BANGOR, MAINE.

PRESSURE-ROLL FOR PLANERS.

Specification of Letters Patent.

Patented Get. '7, 1913.

Application filed July 27, 1911. Serial No. 640,887.

To all whom it may concern Be it known that I, ALFRED L. BYTHER, of Bangor, in the county of Penobscot and State of Maine, a citizen of the United States, have invented a new and useful Improvement in Pressure-Rolls for Planers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

My invention relates to an improvement in pressure rolls for planers.

Among the objects of my invention is to provide a roll in which the friction induced by the thrust of the roll against the interior bearing parts subjected to wear will be distributed over a large bearing surface or area and reduced to a minimum, for in the operation of these rolls the pressure against the friction-bearing parts is very great and causes rapid wear which it is one object of my invention to overcome as much as pos sible.

It is a further object of my invention to employ that type of pressure roll in which the roll consists of a series of sectional parts or units each having an individual bearing against the work by which the planer in which the rolls are employed is adapted for planing boards of different thicknesses at the same time, it being my essential object in employing a roll of this kind to provide one in which the individual sections are as frictionless as possible in accordance with the prime object of my invention and in which, also, each section or part is so arranged that its pressure adjustment can be easily changed.

My invention accordingly consists in providing a roll constructed in accordance with the objects of my invention above described and possessing other advantages of structural detail as may best be seen and understood by reference to the drawings, in which- Figure 1 shows in front elevation a portion of a roll constructed in accordance with my invention and consisting of a plurality of sectional units or parts. Fig. 2 is a vertical cross section of one of the units or parts of the roll. Fig. 3 shows one of the units or parts in side elevation together with those parts of the machine to which the unit is secured, these parts being shown in cross section, and Fig. 4 is a longitudinal vertical section of one of the units or parts constituting the sectional roll.

Referring to the drawings: 1 represents the sides and 2 the bed of a planing machine, these parts being shown diagrammatically for illustrating the disposition and arrangement of the parts afterward to be described.

3 indicates the sectional pressure roll or series of collective rolls or units embodying my invention and which are parallelly arranged in alinement with one another justabove the bed 2 of the machine.

4 is a rod to which the individual sections or units are pivotally secured. This rod extends between and is pivotally secured to the sides 1 of the machine above the bed 2. Extending also between the two sides of the machine and affixed thereto is a cross-bar or head 5. This bar is arranged back of the rod 4 and above the same, that is relatively to the bed 2 of the planer.

Each of the roller sections or units is provided with a roll carrier which in the construction shown comprises a bonnet or part pivotally secured to the rod at. The several bonnets for the several units or sections each consists of spaced sides 6 and 7, respectively, and the connecting part 8 interposed between the two sides. In the construction shown (which of course may be varied) the bonnet is made of three separate parts consisting of the two side plates 6 and 7, respectively, and the interposed'part 8 of some considerable body of metal to which the sides are joined by cross-pins 9. Each of the bonnets is pivotally arranged upon the rod or shaft 4L by said shaft extending through the respective bonnets at points off the center thereof or at one end of the several bonnets, each bonnet thence extending to lie in part beneath the cross-head 5 and even project slightly beyond the vertical plane of the cross-head.

Each of the carriers or bonnets of the respective roller sections or units bears a roll. Each of these rolls consists of a fixed cylindrical bearing 10, which will hereinafter be termed the cylinder, inclosed partly within and interposed between the two sides 6 and 7 of the carrier or bonnet below the part 8 thereof and to which sides the cylinder is fixedly secured at a point preferably beneath the cross-head 5 in the same vertical plane therewith. The cylinder 10 is preferably a solid body and is secured to the sides of the bonnet by a squared pin 1.1 preventing its turning.

Fitting loosely around the cylinder 10 is a press-wheel 12 which is the part that bears against the work. This wheel is capable of rotation as it bears against the work. ()n the inside the wheel is provided with an annular groove forming a box or chamber 18 in which are contained a series of cylindrical roller bearings 1a which bear against the interior surface of the wheel and also against the outer or peripheral surface of the cylinder 10, running upon its surface as the wheel is turned and providing an anti-friction bearing between the parts. Any lateral displacement of the rotary wheels is of course prevented by the sides of the respective bonnets which act as guides for the wheels as they turn on the roller bearings around the cylinders.

Each of the roller sections or units is yieldingly maintained in an operative and adjusted position so that its roll or that portion thereof comprising its rotary wheel 12 will have proper bearing against the work. This is accomplished in the followlng manner: Connecting with each of the bonnets, preferably at a point over the roll carried by it and in the same vertical plane as the cross-head 5 is a pressure bar consisting of an eye-bolt 15. This bolt is pivotally secured to the bonnet by means of a cross-pin 16 extending between and affixed to the sides of the bonnet and lying parallel to the shaft t so that as the bonnet turns on said shaft it may turn also relatively to said bolt. Each of the eye-bolts 15 extends vertically upward throu h openings formed in the crosshead 5 and projects beyond the same. Afiixed to each eye-bolt at a point preferably just adjacent the upper portion of the bonnet to which itconnects is a collar 17. Arranged upon the bolt and interposed between this collar and the under side of the cross-head is a coiled compression spring 18. The upper ends of the several eye-bolts projecting through the cross-head 5 are threaded and each has arranged thereon an adjusting nut 19 which bears against the top surface of the cross-head above the opening therein a washer 20 being preferably interposed between it and the head) and above the nut 19 is a locking nut 21.

The arrangement and disposition of the parts just above described is such that each roller section or unit and the roll carried by it will be independently, and both yieldingly and adjustably maintained in an operative and graduated position.

Each roller section is free to turn on the rod 4 and consequently unless held would maintain a gravitated position in contact with the bed of the machine. Each section is held, however, so that its roll will maintain a position adjacent to but removed from the bed by means of the eye-bolt which connects therewith and extends upwardly through the cross-head as above described, the nuts on the end of the bolt which bear against the upper surface of the cross-head, acting to hold the roller section away from the bed of the machine. In this connection it will be observed that the precise adjusted position of the roller section and roll carried by it with relation to the bed of the machine will depend upon the adjusted position of the nuts on the end of the eye-bolt. While the section is thus held against movement in a downward direction toward the bed of the machine, it is still capable of movement or turning in an upward direction, the shank of the eye-bolt simply extending through the opening in the cross head and the bolts being lifted above the top surface thereof. This is prevented and the roller section and the roll carried by it is yieldingly maintained as against turning or movement in an upward direction by means of the compression spring 18 interposed between the collar on the eye-bolt and the under side of the crosshead. In the normal arrangement of the parts this spring is maintained in the described position under some degree of compression so that the spring will act to hold the roller section and roll carried by it as against movement in an upward direction yet will act only to yieldingly maintain the same as against such movement, the eye-bolt being still capable of rendering through the opening in the cross-head if sufficient force be exerted upon the roller section or roll carried by it as to effect a further compression of the spring, the eye-bolt then rendering through the opening in the cross-head and the nuts arranged thereon being lifted above the same.

It is obvious that the parts admit of considerable variance in the adjusted position of each roller section and roll with respect to the bed of the machine other than the adjustment of the nuts on the end of the eye-bolt. The construction is also such that springs of different lengths or tensions can be easily inserted as occasion may require.

For the purpose-of keeping the surface of the wheels that engage the work clean there may be applied to the end of each bonnet a scraper 22 held in place by a screw 24 and arranged so that the edge of the scraper may just coincide with the peripheral surface of the bearing wheel, thereby acting to remove any matter that may accumulate upon it and prevent proper bearing of the V roll carrier and a roll borne by said carrier, each of said rolls borne by the carrier comprising a cylinder fixed to the carrier, an annular bearing wheel loosely arranged upon the cylinder, a series of roller hearings interposed between said wheel and said cylinder on which said wheel may turn around the cylinder, a rod to which said carriers are pivotally secured whereby they may turn thereon, a fixture located above said carriers and a bar pivotally secured to each one of said carriers and extending upwardly to pass loosely through said fixture and project beyond the same, each of said bars havmg a collar thereon, compression springs arranged upon said bars between their 001- lars and said fixture, and retaining and adjusting means arranged upon the projectin ends of said bars above said fixture an bearing against the same.

ALFRED L. BYTHER. Witnesses:

HAROLD HINGKLEY, F. V. STRIOKLAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.

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