US2571177A - Power swung log turner - Google Patents

Description

Oct. 16, 1951 .1. B. ALLEN 2,571,177

POWER SWUNG LOG TURNER Filed Jan. 12, 1948 2 Sheets-Sheet 1 28 L I 25 35 30 Fig. 2 o-Io OIIO o o o lo t [9 I I 34 36' 0 nl o o 0 0 II o 0 o n 24 29 7 I7 20 'l 3/ Jams 5. Allen INVENTOR.

BY M MM,

Oct. 16, 1951 J. B. ALLEN 2,571,177

POWER SWUNG LOG TURNER Filed Jan. 12, 1948 2 Sheets-Sheet 2 Fig.5.

James 8. Allen INVENTOR.

B @mm Patented Oct. 16, 1951 UNITED STATES PATENT OFFICE 1 Claim.

The present invention relates to new and useful improvements in log turners for sawmills and more particularly to a power operated saw turner adapted to turn a log while resting upon a saw carriage and thus relieve the operator of manual effort and danger of turning the logs.

An important object. of the invention is to provide a log turner which includes a vertically movable bar having a plurality of vertically spaced log engaging teeth to effect the turning movements of the log on its carriage together with means for raising and lowering the bar as well as means for bringing the upper end of the bar into and out of position for engaging the logs.

A still further object is to provide an apparatus of this character of simple and practical construction, which is efiicient and reliable in operation, strong and durable, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view.

Figure 2 is a top plan view.

Figure 3 is a fragmentary transverse sectional view taken substantially on a line 33 of Figure 2.

Figure 4 is a side elevational view of a modified construction illustrating hydraulic operating means for the device and with parts broken away and shown in section.

Figure 5 is a top plan view, and

Figure 6 is a front elevational view.

Referring now to the drawings in detail and first with respect to the form of the invention illustrated in Figures 1 to 3 inclusive the numeral 5 designates a substantially rectangular shaped frame having a transverse shaft 6 journaled in bearing brackets I at the front end of the frame and on which the lower end of a channel shaped post 8 is pivotally mounted for forward and rearward swinging movement.

The shaft 6 is provided with a pair of crank arms 9 to which the lower end of a connecting rod I0 is attached by means of a wrist pin II, the

connecting rod extending upwardly in the post 8 therein during its vertical reciprocating movement.

The upper front edge of the bar I2 is provided with an upper fishtail shaped tooth I4 and a lower upwardly inclined tooth I5 for biting into a log carried by a saw table to effect a turning movement of the log by the raising and lowering of the bar I2.

The shaft 6 is driven by means of a pair of sprockets I6 secured to the ends of the shaft and riven by chains I! from a pair of sprockets I8 secured to the ends of a transverse shaft I9 journalled in bearing brackets 20 secured to the frame 5 at a point rearwardly of post 8.

The shaft I9 is driven by a, pulley "'21 secured to one end of shaft I9 and belt 22 driven by-a reduction pulley 23 secured to one end of a transverse shaft 24 journalled in bearing brackets '25 carried by the frame, the other end of shaft 24 having a pulley 26 secured thereto driven by a belt 21 from a suitable source of power.

The upper ends of bar I2 and post 8 are moved forwardly and rearwardly into and out of engaging position with the log by means of a nigger bar 28 pivoted at its upper end to the post and connected at its lower end to an eccentric 29 driven by a transverse shaft 30 journaled in bearing brackets 3| secured to the rear portion of frame 5. The shaft 30 is driven by a sprocket 32 secured thereto and chain 33 from a sprocket 34 secured to the shaft I9.

Also secured to shaft 30 is a ratchet 35 engaged by a pivoted pawl 36 mounted on the frame to hold the bar I2 and post 8 in a forward position.

In the form of the invention illustrated in Figures 4 to 6 inclusive the supporting frame is shown at 31 to which the lower end of post 38 is pivoted by a transverse pin 39.

A bar 40 is mounted in post 38 for vertical reciprocating movement as heretofore described and is provided with anti-friction rollers 4| travelling in the post.

A hydraulic cylinder 42 is positioned in the lower portion of post 38 and having a piston rod 43 extending upwardly therefrom pivoted to the lower end of bar 40. Fluid pressure supply and geturn lines 44 and 45 are connected to the cylin- A nigger bar 46 is also pivoted at its upper end to the post 38 and has its lower end working in a hydraulic cylinder 41 pivoted to the rear of frame 31 and also provided with supply and return lines 48 and 49.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the sciope'of the appended claim.

Having described the invention, what is claimed as new is:

A log turning device for saw mills, said device comprising a base frame, a hollow vertical guidepivoted at its lower end to said frame, a recipro catable log turning bar disposed in said guide,

power operated means connected to the lower end of said bar .for actuating said bar, said guide being provided with a longitudinal slot, means con nected with said bar and located partially within said slot for swinging said guide and bar into and out of log-engaging position, the last-mentioned JAMES B. ALLEN.

- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 386,853 Sherman July 31, 1888 439,822 McLaughlin Nov. 4, 1890 578,723 Clark Mar. 16, 1897 904,652 Scott Nov. 24, 1908 1,464,769 McLarty Aug. 14, 1923 2,484,362 Weber Oct. 11, 1949

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