US1881465A - Rossing machine - Google Patents

Description

Oct. 11, 1932,

HA. GANES ET AL ROSS ING MACHINE 2 Shets-Sheet' '1 Filed Feb. 10. 1930 M41. m/v M1. 05

INVENTOR ATTORNEY H. A. GANES ET AL 2 Sheets-Sheet 2 ROSSING MACHINE Filed Feb. 10. 1930 Oct. 11, 1932.

INVENTORS ATTORNEY 55 Wang A/ILOE FIIILH Patented Oct. 11, 1932 STATES FFECE ROSSING MACHINE Application filed February 10, 1930'. Serial No. 427,122.

This invention relates to improvements in what are commonly known as rossing machines and it has reference in particular to machines of that kind that are designed for the removal of bark from logs to be used for the manufacture of veneering, or for the making of paper pulp or other products.

The principal object of the present invention is to provide a log barking machine that is readily adjustable to accommodate logs of various lengths and of various diameters, which embodies means for supporting and axially rotating the logs while acted on by the bark removing devices which travel along the log as it rotates.

It is also an object to provide a. support for the bark removing devices, which through the medium of agauge fixed thereto so as to bear in rubbing contact with the log, accu- Z0 rately gauges the depth to which the bark layer is removed and automatically adapts the same to surface variations of the log.

Another important object of the invention resides in the details of construction of the bark removing devices, which are in the nature of a series of revoluble hammers which contact with the bark layer in such manner as to break it off in chips; the hammers being arranged in succession on a driven shaft and are graduated in length so as to remove the bark layer in successive layers from the outside inwardly.

Other objects reside in the details of arrangement of the various parts and in their combination and mode of operation as will hereinafter be fully described.

In accomplishing these objects we have provided the improved details of construction, the preferred forms of which are illus trated in the accompanying drawings, where- 1n Figure 1 is an end elevation of a log barking machine embodied by the present invention.

Figure 2 is a side elevation of a part of the same.

Figure 3 is a detail, in perspective, showing the arrangement and form of the bark removing hammers.

Figure 4 is a plan view of the machine.

Referring more in detail to thedrawings land 2 designate supporting standards between which a log, as designated at 3, may be rotatably supported; the standard 1 being fixed and the standard 2 being adjustable from and toward the other in order to aceommodate logs of different length. At one end the log is supported from standard 2 by an axial pivot 4 and at its opposite end by chuck 5. on the inner end ofa revolubly 0 mounted shaft 6 having a sprocket wheel 7 at its outer end over which a chain belt 8 operates to rotate the log. The belt also operates about a driven sprocket 9 fixed on a shaft 10 revol'uble in a supporting bearing 11 and 5 connected through a suitable reduction gearing, as at 12, with an electric driving motor 18.

Mounted parallel with the axis of the log is a horizontal track formed by a pair of parallel rails 1l14 fixed to a base beam 15. Mounted on the track, for slidable movement therealong is a carriage 16 having anuti17 fixed to its under side and through which a shaft 18', extended lengthwise ofv the base, between the rails, is threaded. The shaft is rotatably fixed at its ends with supporting bearings 19 and 20 and has a gear 21 fixed on one end meshing with a gear 22 fixed on shaft 10 so that the electric motor 13 operates both to rotate the log and also to. revolve the screw shaft to cause the carriage to move along the track.

Mounted on the carriage 16 is a frame base 23 which is slidably joined to the carriage 16 by a dovetailed connection as is shown at 24 in Figure 2. An adjusting shaft 25 disposed transversely of the track is revolubly fixed at one end in a lug 26 projecting upwardly from the carriage 16 and at its opposite end is threaded through a nut 27 depending from and fixed to the under side of the frame base 23. At its outer end the shaft has a'squar'ed shank 28 adapte'd'for the application of a wrench thereto whereby it may be rotated to adjust the frame base 23 toward or from the log-supporting means.

Supported by the frame base 23' inbearings 3030 at its opposite sides is a shaft 31 disposed parallel with and directly above the screw shaft 18, and pivotally supported on the shaft 31 is a frame 32 comprising opposite side sections 32a-32a joined rigidly by spacing bars 32?). A base 33 is formed on the frame at the side opposite the long bar for mounting an electric motor 34 and extending from the frame at the side directly opposite the motor are arms 35-35 which at their upper ends revolubly support a shaft 36 on which a series of bark removing hammers 37 are fixed. The shaft 36 has a sprocket wheel 38 at one end alined with a similar sprocket 39 on the driving shaft 40 of motor 34 and a chain belt 42 operates over the sprockets to revolve the shaft 36 and the bark removing hammers thereon.

In the arrangement of the frame 32 pivotally on the shaft 31 it is adapted to be tilted from or toward the log so as to bring the bark removing hammers into position for contact with logs of various diameters and also to permit automatic adjustment of the device to the surface variations of the log as it revolves. The slidable adjustment of the base 23 on the carriage permits the whole mechanism carried by the base, to be moved from and toward the log supporting means to thereby accommodate it to logs of various size.

Fixed on the base 23 between the side members of the frame 32 and transversely of the shaft 31 is a radially curved arch 44 and pivotally attached to this by a pin 45 at the side nearest the log is a rod 46 which extends slidably through a lug 47 on the frame. At the outer end of the rod is a nut 48 and coiled about the rod and bearing against the frame lug and against nut 48 is a spring 49 which operates to yieldably urge the frame toward the log and thereby retains the bark removing hammers in proper relation to the log for the removal of the bark.

To limit the extent to which the bark layer may be removed by the revolving hammers, we have provided a gauge or guide in the nature of a lever arm 50 that is pivotally mounted about the shaft 36 with one end 50a curved upwardly to engage with the barked surface of the log after the fashion of a sled runner. The other end of the lever is adjustably attached through a pivoted nut 53 to a threaded screw 54 carried in a pivoted nut 55 mounted in an arm 35 of the frame. Rotation of the screw by means of a wheel 56 at its lower end adjusts the gauge runner to regulate the depth to which the bark layer is removed. When it is desired to withdraw the hammers from the log, this is done manually by manipulation of a hand wheel 60 on a shaft 61 mounted in supporting bearings 62 carried by the frame 32. At its inner end the shaft 61 has a bevel gear 63 fixed thereon in mesh with a bevel gear 64 keyed on a cross shaft 65 mounted in the frame and extended concentrically through the radially curved arch 44. On this shaft 65 is a gear 66 meshing with gear teeth 67 on the arch. By this mechanism, rotation of the hand wheel 60 causes rotation of the gear 66 and, through connection of the latter with the arch, the frame will be tilted inwardly or outwardly. This gearing is not of such character that it will in any way interfere with the automatic adjustment of the frame under influence of the spring 49. V

A novel feature of invention resides in the construction of the hammers and their rela tionship. These hammers are in no sense knives or cutters that soon become dulled by reason of contact with sand and grit in the bark but are in the nature of double ended hammers. Each hammer consists of a fiat bar, provided centrally with an opening for 7 receiving the shaft 36 and each has a forwardly directed, blunt nose 37a at its end. The hammers are arranged along the shaft, each advanced relative to the other and the hammers at the end are progressively decreased in length'so that as the device is ad vanced along the log, the bark is removed in successive layers. The rapidly revolving hammers, simply operate to pound the bark off in small chips.

It is quite apparent that details of construction and arrangement of parts might be altered without departing from the scope of the invention, and for this reason, it is not desired'that the claims be limited only to the precise details shown but that they broadly cover the device commensurate with the scope of the invention.

Having thus described our invention what we claim as new therein and desire to secure by Letters-Patent, is:

1. In a device for removing. bark from logs, the combination with log supporting and rotating means of a barking head comprising a revolubly driven shaft parallel with the log supporting means, a series of hammers arranged in close relation radially of and fixed on the shaft, each successive hammer being angularly advanced with respect to the'one next adjacent, and said hammers at the opposite ends of the series being I gradually decreased in length.

2. A combination as recited in claim 1, wherein each of the hammers has a forwardly curved blunt end portion.

Signed at Tacoma, WVashington, this 3rd day of January, 1930.

HAKON ADOLPH GANES. WILLIAM KILDE.

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