US2733742A

US2733742A - bedard

Info

Publication number: US2733742A
Authority: US
Publication date: 1956-02-07
Anticipated expiration: 1973-02-07

Description

Feb. 7, 1956 P. H. BEDARD BARKING MACHINE HAVING AN AXIALLY MOVABLE ROTATING DRUM CARRYING RINGLIKE HAMMERS 2 Sheets-Sheet l Filed Nov. 24, 1954 INVENTOR Pczu/ H. BEDARD ATTORNEYS Feb. 7, 1956 P. H. BEDARD BARKING MACHINE HAVING AN AXIALLY MOVABLE ROTATING DRUM CARRYING RINGLIKE HAMMERS 24, 1954 2 Sheets-Sheet 2 Filed Nov.

INVENTOR Paul H. BEDARD ATTORNEYS Unid states Patent o BARKING MACHWE HAVING AN AXIALLY MGi/'- ABLE ROTATING DRUM CARRYING RINGLEKE HAMMERS Paul Henri Bedard, Quebec, Quebec, Canada Application November 24, 1954, Serial No. @14,059

Claims. (Cl. 144-208) The present invention relates to a barking machine and more particularly to such a machine having an axially movable rotating drum carrying ringlike hammers.

The general object, according to the present invention, is the provision of a barking machine for removing the bark from logs in which the barking head, which consists in an axially movable rotating drum carrying ringlike hammers, is constructed in such a manner that the rods supporting the hammers are themselves rigidly supported adjacent each hammer.

Another important object of the present invention is the provision of a barking head of the character described in which the hammers cover the entire length of the barking head without leaving any dead length along said head so that the barking head will be effective to remove bark along its entire length.

Yet another important object of the present invention is the provision of a barking machine of the character described in which the barking head or rotating drum is mounted for axial movement along a path parallel to 'the log to be barked, and in which the barking head may be pivoted to take an angular position with respect to said log whereby the latter may be barked in an ecient manner and without damaging the woody part of the log despite irregularities on the surface of said log and variations in its diameter.

Still another important object of the present invention is the provision, in a barking machine of the character described, of a barking head provided with means engageable with the log and effective to displace the barking head alongside the log to effectively bark the entire length thereof. y

The foregoing and other important objects of the present invention will become more apparent during the following disclosure and by referring to the drawings in which:

Figure 1 is a perspective view of the barking machine according to the present invention;

Figure 2 is a fragmentary sectional view of the barking head in operative position. relative to a log which is to be barked and is taken onthe line 2--2 in Fig. 4;

Figure 3 is a plan view of the structure shown in Fig. 2;

Figure 4 is a fragmentary longitudinal section of the barking head and its guideway, as indicated by the line 4-4 of Fig. 2, except that a bark-deflecting shield has been omitted, and certain parts have been shown in elevation;

Figure 5 is a fragmentary elevation of the barking head in assembled position;

Figure 6 is an exploded perspective view of some of the elements of the barking head; and

Figure 7 is a cross-section through the barking head on the line 7-7 in Fig. 4 and shows the operation of the barking hammers for the removal of the bark.

Referring now more particularly to the drawings in which like reference characters indicate like elements throughout, the barking machine,'according to the present invention, is preferably mounted on a base frame, generally indicated at 1, preferably in the form of a sleigh for ease of transportation of said machine in the woods where it will normally be operated.

Stocks

2 and 3 are mounted one at each end of the sleigh 1 and spindles 4 are rotatably mounted in the

stocks

2 and 3. The spindles 4 are in axial alignment and are provided with teeth adapted to grip both ends of a log 5 about to be barked so as to rotate the same.

The spindles 4 are rotated through the means of

pulleys

6 and 7, belts 8, pulleys 9 which are secured to a common shaft l0, pulley 11 also secured to said shaft i0, belt 12 trained on the pulley 11 and on a pulley i3 which is in turn secured to an output shaft 14 of a speed-reducing gear (not shown) and which is connected to a gasoline engine or the like (not shown), and speedreducing mechanism and gasoline engine being housed in a casing l5.

A barking head 2b is mounted for longitudinal movement on a bedway 21 which comprises a channel-shaped member mounted at the upper ends of arms 22 which are supported at their lower ends by means of a longitudinally extending rod 23 mounted for pivotal movement on the base frame l. Thus the bedway 21 and, consequently, the barking head 20 can describe an arcuate movement around the axis of the rod 23 and thus in a direction transverse to the longitudinal axis of the machine, and the barking head 20 may be brought to a position close to the log 5.

A shaft 24 extends longitudinally within the bedway 21 and is journalled at both ends in the same. A pulley 25 is secured to the projecting end of the shaft 24 and is operatively connected tothe engine by means of a belt 26. As shown in Figures 2 and 4, the shaft 24 is provided with a keyway 27 extending substantially along its entire length for driving engagement with a sprocket 28 which is keyed to the shaft 24 for slidable movement thereon. The barking head 20 comprises a carriage 29 consisting of a plate resting on round ribs 30 of the bedway 2l and provided on its underface with four horizontal rollers 3l engaging the inside lateral face of the ribs 30 to guide the carriage 29 in its sliding movement along the bedway 2l. A downwardly extending plate 32 and a pair of downwardly extending plates 32 are secured to the underside of the carriage plate 29 and freely surround the shaft 24, the plates 32 being located at opposite sides of the pinion 2S. Collars 33 are secured to the plates 32 and abut the sides of the pinion 2S whereby said pinion moves along the shaft 24 together with the carriage 29 during slidable movement of the latter on the bedway 21.

A support plate 39 is mounted above the carriage 29 for pivotal movement in a horizontal plane about a pivot axle 4b which is disposed verticaliy above the pinion 23 at one end of the support plate 3% and carriage 29. The support plate 39 is slidably supported at its middle portion on ribs 4l which are secured to the carriage 29, and is guided in its pivotal movement by means of a pin 42 secured to said support plate 39 and downwardly extending to engage an arcuate slot 43 made in the carriage 29. Uprights 44 are mounted at both ends of the support plate 39 and carry

bearings

45 and 46 in which a shaft 47 is journalled. rl`he shaft 47 carries the barking head 2b. A sprocket 48 is secured to the shaft 47 adjacent the bearing 46 in a position vertically above the pinion 2S. The pinions 28 and 4b are connected by means of an endless chain 49 which passes through suitable holes made in the support plate 39 on both sides of the pivot axle 4i). Thus the unit consisting of the support plate 39, uprights 44, shaft 47 and barking head 20 may be swung about a longitudinal axis of the pivot axle 40 relative to the carriage Y22 and this unit may be displaced along the bedway 21 together with said carriage 29, while the shaft 47 remains drivingly connected to the shaft 24 lthrough the means of the sprockets 28 and 4S and the chain 4s. Y

L-shaped handles are secured to the uprights 44 and are used to manually slide the barking head along the bedway 2l and to pivot the barking head about the pivot axle 4i) as shown in Figure 3. A bark-deflecting shield is mounted on the plate 39, as shown in Figs. l-3.

The barking head 2i) is a drumlike structure which consists of a plurality of disks 51 loosely mounted on the axle L57 in adjacent parallel relationship and each is provided with a pair of diametrically opposed recesses 52, as shown in Figures 6 and 7.

Circular end plates

53 and 54 are secured to the shaft e7 at the ends of the disk assembly and serve to retain the disks 51 against longi tudinal movement relative to the shaft 47 and also against rotational movement relative to the shaft 47 by means of connecting rods 55 which extend, longitudinally Vin parallel relationship with the shaft 47, through a plurality of registering holes 56 made in the disks Sl.

The plate 53 remote from the pivot axle 4i), is of the same diameter as the disks S1; while the plate 54, which is nearer to the pivot axle 4i?, has a slightly greater diameter than said disks 51 so as to project outwardly therefrom, as shown in Figure 4. The plate 54 is provided with a helical thread 57 adapted to engage the log 5, whereby relative rotation between the barking head Ztl and the log 5 will cause slow longitudinal displacement of the barking head 2) relative to said log 5.

A barking hammer 5S is loosely mounted on a transverse rod 61 and is disposed in each of the recesses 52 of each disk 5l and between planes containing planar faces of said disk, and consists of a ring member having a hole et! and having on its outer periphery a plurality of inclined scraping teeth 59 adapted to engage the bark of the log 5. The central hole 60 of each barking hammer 58 has a substantially larger diameter than the diameter ot' the transverse rod 61 which passes through said hole et). Thus the barking hammers 53 are also disposed between Aconfronting planar faces of adjacent disks and arc free to move about Vthe rods 6l in the recesses 52 between said adjacent disks Sl.

T he rods 61 are secured at both ends to the

end plates

53 and 54 as shown at 62. The recesses in the successive disks 51 in the` disk assembly are disposed 90 degrees out of phase to each other so that a recess 52 of one disk 51 willrbe opposite a nonrecessed portion ot ti e two adjacent disks. Therefore, a line connecting a pair of barking hammers 58 associated with one disk 51 will be disposed at right angles to lines connecting the pairs of barking hammers 58 associated with the two adjacent disks 5l, as shown in Figure 6. Thus the rods 6l on which the barking hammers 58 are mounted are rmly supported close to each side of said hammer 58 by passing through holes 65 made in the nonrecessed portion 66 of the ad- .jacent disks 51.

From the foregoing arrangement it will be seen'that the barking hammers SS are capable of limited move- Y Y ment relative to the disks 5l in al planar path perpendicular to the axis of rotation of said disks.V Upon rotation of the shaft 47, the barking hammers 5S will be subjected to centrifugal force which will swing them outwardly so that they extend partly beyond the periphery of the drumlike structure 2i). Y

It has been found in actual practice that the hammers 53 do not chip or damage the woody part of the log during the barkingoperation as the barking hammers 525l Ving saidv log from engagement with said spindles.

are free to move in planes transverse to the log 5 and are not maintained in a fixed position of contact therewith. Therefore, any localized variations in the thickness of the bark of the log or of the diameter of said log will be automatically taken care of by the transversely moving hammers 5S. It will be noted that the hammers 58 cover the entire length of the barking head without leaving any dead length along said barking head because the disks 51 are in contact with each other and the hammers 58 are disposed in edge to edge relation with said disks 51.

rhe log and barking head Ztl are rotated in the same direction, as shown in Figure 7, but at different rates of speed, the log S being rotated at a much slower speed than the barking head Ztl such that the rapidly moving hammers 58 will act on the entire surface of the log 5 to thereby completely strip the same of bark.

The operator of the barking machine, according to the present invention, presses the barking head 20 against the log 5 by manipulating the handles 50. Said barking head 26 is automatically displaced longitudinally of the t bedway 2l because the threads 57 of the end plate 54 engage the log S to exert a feeding action on the barking head 2i). Manipulation of the, handles S0 will also vary the inclination of the barking head 2t) relative to the log :3' by pivoting said barking head 2t) about the pivot axle lil in order to take care of the longitudinal variations of the diameter of the log 5.

The machine, according to the present invention, may be provided with means for automatically inserting the log 5 into engagement with the spindles 4 and for remov- Said means are not shown in the drawings and form no part of the present invention.

While a preferred embodiment according to the present invention has been illustrated and described it is understood that various modifications may be resorted to without departing from the function and scope of the appended claims.

I claim:

l. In a barking machine, a barking head comprising a drumlike structure consisting of a plurality of disks mounted in adjacent parallel relationship and each provided with a pair of diametrically opposed recesses, the recesses in the successive disks being disposed substantially degrees out of phase to each other so that a recess of one disk will be opposite a nonrecessed portion of two adjacent disks, circular end plates at the ends of the disk assembly, connecting rods passing through said disks and said end plates to secure said disks and end plates one against the other, and barking hammers mounted in said recesses, consisting of ringlike members provided with external scraping teeth, the central holes of said ringlike members being substantially larger than the diameter of said rods, said ringlike members surrounding some of said rods and being free to move in said recesses relative to said disks in planar paths parallel to said disks from a retracted position within the interior of Said drumlike structure to a position projecting outwardly from the periphery of said drumlike structure, and means to rotate said barking head. Y

2. In a barking machine, a barking head comprising a drumlike structure consisting of a plurality of disks mounted in adjacent parallel relationship and each provided with a pair of diametrically opposed recesses, the recesses in the successive disks being disposed substantially 9 0 degrees out of'phase to each other so that a recess of one disk will be-opposite a nonrecessed portion of two adjacent disks, circular end plates at the ends of the disk assembly, connecting rods passing through said disks and said end plates to secure said disks and end plates oner against the other, and barking hammers mounted'in (said recesses, consisting of ringlike members provided with? external scraping teeth, the central holes of said ringlikemembers being substantially larger than th'ediameter of'saidv rods, said ringlike members surrounding some of said rods and being free to move in said recesses relative to said disks in planar paths parallel to said disks from a retracted position within the interior of said drumlike structure to a position projecting outwardly from the periphery of said drumlike structure, means to rotate said barking head, and one of said end plates having a greater diameter than the diameter of said disks and provided with external helical threads adapted to engage a log to be barked.

3. In a barking machine as claimed in claim 2, further including a base plate on which said drumlike structure is mounted, a carriage on which said base plate is pivotally mounted for movement about a longitudinal axis of a substantially vertical axle mounted at one end of said base plate, and a bedway extending longitudinally of a log to be barked and on which said carriage is mounted for longitudinal movement along said bedway.

4. In a barking machine as claimed in claim 3, further including a driving shaft mounted within said bedway and having a keyway extending therealong, Va sprocket 20 mounted on said driving shaft for longitudinal movement therealong and having a key for engagement with said keyway so as to be rotated by said shaft, means to mainincluding support means for said bedway, said support Y means comprising a rod extending longitudinally of said log, arms pivotally mounted at their lower ends on said rod and supporting said bedway at their upper ends, whereby said bedway may be swung about said rod towards or away from said log.

References Cited in the tile of this patent UNITED STATES PATENTS 987,828 Schenck Mar. 28, 1911 1,549,855 Cote Aug. 18, 1925 1,692,028 Elliott Nov. 20, 1928 1,881,465 Ganes et al. Oct. 11, 1932 2,397,490 Kenney Apr. 2,V 1946 2,401,500 Ockfen June 4, 1946 2,436,555 Daniell Feb. 24, 1948 2,581,617 Alfsen Jan. 8, 1952