| WO1989005220A1 | 1989-06-15 |
| DE1190632B | 1965-04-08 | |||
| EP0294364A2 | 1988-12-07 | |||
| US2753901A | 1956-07-10 | |||
| AU6078665A | ||||
| AU6267086A | 1987-03-19 |
| 1. | Claim 1 A post, pole, rail, or other, machining machine that machines parallel axis, cylindrical, spigots onto posts, poles, rails or other, comprising; a) a powered cylindrical cutter base wrapped with chain saw chain which engages and machines a post, pole, rail, or other'? end; and b) a means of clamping and self centering within an area that can be guided and caused ~ rotate in one direction only at a desired speed, and c) a support for the other end of the pcεt, pole, rail, or other Claim 2 A post, pole, rail, or other, machining machine that machines post, pole. rail, or other's ends as claimed in claim 1, and with options of powered rotation of post, pole, rail, or other self centering and clamping rotationa system and or powered post. pole, rail, or other clamping system Claim 3 A post, pole, rail, or other, machining machine as herein described, and Illustrated in the accompaning drawings. |
The following is a full description of this invention, including the best method of performing * it known to me. This invention em b odies an idea that ena b les the ol d st y stan d ar d p ost an d rail fences to be built easil y an d che with mo d ern lone lasting treated pine. The same invent ¬ ion can also enable treated pine or other to b e use d effectively for man y other farm, industrial, and civil us Thi, invention easily machines a reduced diameter paralle circular cross section, cylindrical spigo on the end of timber Pieces. These slip neatly into drilled holes in Posts or other as required, A simple pin or nail can be use d to secure these joints.
A s p ecial cutter is made of a solid cast or fabricated c y lindrical^ sha p ed base with a narrow g roove cut or Provided on the cylindrical surface in a helical sha p e like a lar g e d iameter course pitch threa d . m this g roove a conv ntionel chain saw chain is wrappe d aroun d from one en d to the other. Note drawing. This enables an econom ¬ ically and available cutter to be manufactured. This chain is easy to sharpen, and can be replace d simply and quickly when required.
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This cutter can be mounted directly to an engine output shaft or can b e remotely driven by « v « belt, pro p eller - shaft, hydraulic, or other.
The tim b er post. poLe, rail, or other is clamped and allowed to revolve around it's cylindrical axis. When the rotating cutter and the object to be machined, which is slowly counter rotated, comes into contact, the cutter machines a reduced diameter cylindrical spigot onto the d of the o bj ect. If. for instance, both ends of a rail were machine d as a b ove, and holes were drilled t h e same distance a b ove groun d level of two p osts in such a way that the rail coul d b e inserted Into both posts horizont ¬ ally , the first rail of a post and rail fence would be complete.
In similar ways, many other items- could b e b uilt.
The following description of the preferred embodiment of the invention should be read in conjunction with the attached drawings.
This machine is designed to machine treated pine poles as are currently in use in the fencing industry. Normal diameters range from 75mm to 200mm. Usually approximately 50 mm diameter spigots are machined.
The machine cutter is made of a cast iron cylinder approx¬ imately 125mm long and 100mm diameter with a 20mm hole machined in it's axis to allow direct mounting to an engine output shaft. A narrow helical groove, 20mm pitch, is machined onto the periphery of the cylinder. A chain saw chain, attached each end by a screw, is wrapped around this groove with the cuttirr edge facing the appropriate direction.
A self centering clamping system is used to secure the pole to ensure directional and axially true rotation. The self centering system is installed within a flanged circular housing that is guided in it's rotation by roller bearings spaced equally around it's circumference. See drawing. Handles spaced equally around this housing enables the pole to be rotated accurately and at the desired speed.
The other end of the pole rest in a simple "vee" at the other end of the frame.
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An adjustable stop helps position the pole for the desired spigot length, ie 50-65πun. A rotation directional limit¬ ing catch allows controllable rotation only. To operate, a lever with an automatic catch is pulled to operate the self centering device and clamp. This pulls a chain which in turn rotates three separate sprockets evenly. Each sprocket is integral with a blade and pivot. When the chain is pulled, each sprocket and blade pivots e ually which centers and clamps the inserted pole. The motor cutter is mounted on a pivot off center so that gravity will pull the cutter into the pole end. The motor cutter is held by an easily released catch in the neutral position away from the pole end to allow pole insertion and removal. The movement of the motor cutter into the p y ^l e en is dampened by a hydraulic dampener. An adjust¬ able stop limits motor cutter travel to control spigot diameter. As gravity draws the rotating motor cutter Into the pole end, the pole is rotated by hand via the handles on the self centering locking rotatable housing. This rotation is continued until cutting is completed. Then the motor cutt-Ξr is reτurned to neutral position, the rail clamp is released, and the pole cr rail is removed with it's machined spigct end finished. The machine is then ready for further use.
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Optional features can Include alternate cutter chains, ie carbide chain teeth, etc.: electric, hydraulic, or other remote drive of the cutter; electric, hydraulic, or remote powering of the pole clamping rotational member: electric hydraulic, or remote clamping of po s: and various sup¬ port systems for the tail or un machined end.
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