US1953194A

US1953194A - Bark removing machine

Info

Publication number: US1953194A
Application number: US588717A
Authority: US
Inventors: Sharkey Murray
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-25
Filing date: 1932-01-25
Publication date: 1934-04-03
Anticipated expiration: 1951-04-03

Description

A ril 3, 1934. t M SHARKEY BARK REMOVING MACHINE Filed Jan. 25, 1932 4 Sheets-Sheet l April 3, 1934. M. SHARKEY BARK REMOVING MACHINE Inventor 1/14 afirm/ d /far rgj A ril 3, 1934.

Filed Jan.

4 Sheets-Sheet 3 2 \H Q 0 k v 7/ m Invenior agar/:07 Jfiar/re/c pwm l April 3, 1934. SHARKEY 1,953,194

BARK REMOVING MACHINE Filed Jan. 25, 1952 4 Sheets-Sheet 4 I m: en for flzmaai ih flllorney Patented Apr. 3, 1934 UNITED STATES PATENT OFFICE Claims.

This invention relates to mechanical means for removing bark from logs and particularly to mechanical means for removing the bark from log blocks which are to be cut up to make veneering, and an important object of my invention is to provide mechanical means of type which makes use of the force of gravity well as of mechanical force in operating upon the logs, and which is simple and inexpensive in construction, and very economical to operate and maintain.

These and other objects of the invention will be apparent from a reading of the following description and the drawings, wherein for purposes of illustration I have shown a preferred embodiment of the invention. i

In the drawings:

Figure 1 is a side elevational View of the aforesaid embodiment of the invention.

Figure 2 is an end elevational view of the gate equipped discharge end of the embodiment.

Figure 3 is a transverse vertical sectional view through the embodiment illustrating the construction and relation of parts.

Figure 4 is a plan view of a portion of the conveyor.

Figure 5 is a perspectitve view illustrating in detail the construction of the impact dogs.

As seen in Figure 3, the embodiment comprises the machine 5 disposed in a pit designated by the numeral 6. On the ground Get at one side of the pit 6 is the loading platform '7 from which the blocks or logs are rolled into the machine to have the bark removed therefrom. In the drawings is shown one of the blocks or logs 8 which has been heated and steamed according to the practice in veneer factories before it is introduced into the machine 5 to have the bark removed therefrom.

The machine 5 comprises a suitable frame structure which includes vertical corner posts 9 arranged in pairs at opposite ends of the pit, end cross members 10 and longitudinal side members These parts are preferably in the form of suitably proportioned I-beams. The end cross members 10 support therethrough the longitudinal disposed rotary shaft 12 on the right hand end portion of which is fixed large driven gear H 13. The portion of the shaft 12 which projects beyond the gear 13 is carried in a bearing 14 on a support 15.

The numeral 16 designates a stub shaft rotatably supported at one end in a bearing 17 carried by a support 17a, and at the other end on the frame. Fixed on the stub shaft 16 is a driving pinion 18 in mesh with the gear 13. The stub shaft is further provided with a pulley 19 to accommodate a power supply belt (not shown).

Within the frame the shaft 12 is provided with longitudinally spaced sets or pairs of bark removing dogs. Each dog comprises a pair of arms 20 which have their ends oppositely and laterally curved and rounded to form blunt impact terminals 21. The inward ends of the members 29 are disposed on opposite sides of the shaft 12 and bolted in position thereon by means of suitable bolts 22.

The numeral 23 designates a conveyor trough in which the endless conveyor 24 is arranged. The conveyor comprises longitudinally spaced suitably constructed carrier elements 25 mounted on a single chain 26 operated by the actuating drum 2'? which is fixed on the shaft 28 (see Figtires 2 and which is supported in the right hand corner posts 9.

Supported by the side members 11 of the frame are horizontal transversely disposed I-beams 29 which are longitudinally spaced. The I-beams 29 are so located as to permit the dogs 20 to pass between them and above them as the arms 20 are rotated.

Supported on each I-beam 29 is a generally J-shaped log engaging and retaining element 30 which comprises a substantially horizontal portion 31 resting upon and attached to the I-beam 29 from which proceeds an outwardly and upwardly diverging

portion

32 and 33 supported on canted longitudinal I-beams 34 carried between the corner posts 9 of the frame structure as seen in Figure 3. 32 proceeds an inwardly and upwardly directed portion 35 which is substantially parallel to the portion 33.

The portion 33 of the elements 30 co-operate with the loading platform 7 so as to form an inclined chute to facilitate introduction of the logs or blocks 8 into the machine.

Supported in bearings at the left or discharge end of the machine upon the corner posts 9 is a crank shaft 36 (see Figure 2) whose throws 37 rockably carry hanger straps 38 on a gravity closed gate 39. As the bark is removed from a block, the block may be pushed to the discharge end of the machine, the gate 39 opened, and the block discharged onto conveyor 24 and carried thereby to the lathe (not shown) for cutting into veneer or to storage.

The operation of my machine is as follows: A log or veneer block to be de-barked is rolled from the platform into the cradle composed of the From the upper end of the portion J-shaped members 30. The pounding elements composed. of the arms 20 are then set into motion, and as they rotate, the arms and the blunt ends 21 strike the log and macerate and loosen the bark therefrom and hurl the log against the

portions

32 and 35 of the cradle. The position of the portions 35 with respect to the portions 32 is such that as the log is hurled thereagainst the log is prevented from leaving the cradle and is at the same time rotated on its longitudinal axis so as to bring different portions of the surface thereof into position to be struck by the pounding elements. The bark separated from the log by this action drops through the cradle into the conveyor by which it is conveyed away from the machine. As the debarking of a log is completed in this manner, the gate 39 may be opened and the log pushed from the cradle onto the conveyor by which it may be conveyed either to storage or to the cutting machines.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claims.

I claim:

1. A log debarking device comprising a cradle composed of longitudinally spaced transverse members, rotary hammer means operable between the transverse members to act upon a log received in the cradle, for turning the log and removing the bark therefrom, formations on said transverse members against which. the log propelled by the hammer means and which act to prevent the leg from leaving the cradle as a result of the action of the hammer means and to aid in the turning of and removal of bark from the log, formations comprising an outwardly and upwardly angular Tower portion and an upwardly and inwardly angular upper portion on the lower portion.

2. A log debarking device comprising a frame carrying longitudinally spaced transverse members forming a cradle, rotary hammer means on the frame and operable between the transverse members to strike and throw a log deposited in the cradle, for turning the log and removing the bark therefrom, formations on said transverse members againstwhich the log is propelled by the hammer means and which act to prevent the log from leaving the cradle as a result of the action of the hammer means, said hammer means being constructed to aid in the turning of and removal of bark from the log, said hammer means having annular end portions turned in the direction of rotation thereof, said transverse members being V-shaped, and said formations comprising one side of the V shaped members, and an inwardly angular extension thereon.

3. A log debarking device comprising a cradle composed of longitudinally spaced transverse members, rotary hammer means operable between the transverse members to act upon a log received in the cradle, for turning the log and removing the bark therefrom, formations on said transverse members against which the log is propelled by the hammer means and which act to prevent the log from leaving the cradle as a result of the action of the hammer means and to aid in the turning of and removal of the bark from the log, a rotary shaft carrying said hammer means, a frame carrying said cradle and the shaft, a loading platform on the level with the cradle for feeding a log into the cradle gravitationally, and a swingable gate in the frame closing one end of the cradle and adapted to be opened for discharging a debarked log from the cradle.

4. A log debarlring device comprising a cradle composed of longitudinally spaced transverse members, rotary hammer means operable between the transverse members to act upon a log received in the cradle, for turning the log and removing the bark therefrom, formations on said transverse members against which the log is propelled by the hammer means and which act to prevent the log from leaving the cradle as a result of the action of the hammer means and to aid in the turning of and removal of the bark from the log, said formations comprising an outwardly and upwardly angular lower portion and an upwardly and inwardly angular portion on the lower portion, and conveyor means carried by the frame to receive and convey the bark removed from a log as the bark falls between the transverse mem ber of the cradle, and for receiving a debarked log as it is discharged from one end of the cradle.

5. A log debarking device comprising a frame carrying longitudinally spaced transverse members forming a cradle, rotary hammer means on the frame and operable between the transverse members to strike and throw a log deposited in the cradle, overhanging portions on said transto prevent the log from leaving the cradle when propelled by the hammer means.

MURRAY SHARKEY.