US2583047A - Material handling apparatus with drag saw - Google Patents

Description

Jan- 22, 195 E. E. HANSEN ET AL MATERIAL HANDLING APPARATUS WITH DRAG sAw Filed Oct. 17, 1945 5 Sheets-Sheet 1 INVENTORS ATTORNEY EDWIN E, HANSEN CARL c, HANSEN Jan. 22, 1952 E. E. HANSEN ET AL MATERIAL HANDLING APPARATUS WITH DRAG SAW Filed Oct. 17, 1945 3 Sheets-Sheet 2 INVENTOR.S, EDWIN E, HANSEN BARL C, HANSEN J 1952 A E. E. HANSEN ET AL MATERIAL HANDLING APPARATUS WITH DRAG SAW 3 Sheets-Sheet Filed 001;. 17, 1945 INVENTOR. EDWIN E. HANSEN BY CARL C. HANSEN Patented Jan. 22, 1952 UNITED STATES PATENT OFFICE 'MA'TERIALHANDLING APPARATUS WITH DRAG SAW Edwin.E. -Hansen andCarl C..Hansen, Astoria, Oreg.

'Application octoberl'i, 1945, Serial No. 622,904

6 Claims.

This invention relates to dragsa-ws andisjpar- .ticularly adapted to tractors having a bulldozer -mounted thereon.

The primary object of the invention is to mount :2, specially constructed drag saw assembly to a tractor having a bulldozer mounted to the tractor the saw is in operation. The bulldozer is also used in combination with the drag saw forraising the log, eliminating "the binding of the out against the saw when the log is being bucked.

In other words in operationi-he bulldozer acts as a holding devicefor thelog while the saw is being operated, and the combining of thebulldozer with'a drag saw assembly is the primary object of our invention.

These and other incidental objectswill be apparent in the drawings, specification'and claims.

Referring to the drawings:

Figure 1 illustrates our new and improved drag saw mounting as-appliedto a conventional type tractor, having a bulldozer mountedthereon.

Figure 2 is a fragmentary detailed plan view of the saw mounting to the bulldozer, parts broken away for convenience of illustration.

Figure 3 is a fragmentary detailed sectional view of the driving and oscillating mechanism, taken on line 3--3 of Figure 1.

Figure .4is a detailed sectional view of Figure -3 taken on line 4-4 of Figure 3.

Figure 5 is a'fragmentary enlarged side View of the saw carrying head, parts broken away for convenience of illustration.

Figure .6 is a sectional view taken on. line 6-6 of Figure.5.

Figure 7 is afragmentaryview illustratinghow the. bulldozer may be used-for raising a logfrom a sagging position.

In the drawings:

The usual conventional tractor is indicated at I, having a standard bulldozer -2 pivotally mountedat-3 to the frame-4 of the tracksi. Theraising andlowering mechanism for the bulldozer is indicated at-6,-and may be of any wellknown type.

Our.invention-..consists of .mounting the drag sa-w assembly, indicated .in general-at A to the tractor. This'assembly consists of a .frame or arm 1 extending forwardly from orrigidly connected to a yoke or goose. neck .8, which is pivotallymountedat il toan oscillating eccent ic 00nnection it including and through the medium of .an arm 35, the object of which will be described .more fully later on.

A travelling head II is mounted to the frame I in the following manner. A series of rollers l2 are journalled to the lower rectilinear guide or track portion of the frame 1 on axles I 3, their outer ends being supported by a bracket bar I4 secured to the lower edge of frame 1, best illustrated in Figures 5 and 6. The lower edge l5 of the travelling head Ii runs over'the rollers I2 through the length of the stroke of the drag saw, *the object of running the head over the rollers being to prevent trash from collecting on the edge or track l5. Rollers l6 are rotatably mounted to the upwardly extending brackets I? of the head II and engage the track [8, which is fixedly mounted to the frame 1 by the bracket [9. Here again the track points downwardly over all the rollers l3, preventing trash or foreign matter from lodging on the track.

Extending horizontally at right angles from the track I8 is a frame 20, which provides a support for the guide rails 2| and 22, which may be of a material such as wood. The saw is indicated M23 and is secured to the moving head I I by the bolts 24 and side plates 25. The upper edge 26 of the saw runs longitudinally between the guiderails 2 I and 22, assisting in keeping the sawrunning parallel to the frame 1.

Guide rail assembly 2'! is pivotally mounted at 28 to the frame or rail 23 and further guides the saw into the log while starting the cut, after which itis free to hinge upwardly out of the way. In the operation of the drag saw it is desirable in'some kinds of work to operate the saw in a straight line motion, but in other kinds of work it isdesirable to oscillate the saw in its sawing action above and below its longitudinal center line, so as to moreeifectively do its work. We have provided the sawing mechanism for accomplishing this result. The driving assembly for the saw .is mounted to the frame 4 of thetrack laying assembly of the tractor and consists of securing a spindle29 to the frame 4 by the flange 30. See Figs. 2 and 3. .Rotatably mounted on the spindle 29 isahub .3l having a sprocket 32 fixedly secured thereto by. any suitable means.

.Rotatablymounted to the hub 3| is an eccentrio 33, having an eccentric ring or collar .34 mounted thereon. Extending upwardly from this eccentric ring is the arm 35, which is pivotally mounted to the goose neck .8 and 3 as heretofore mentioned. The eccentric .33 may be locked to .the hub 3| or sprocket 32 by a pin 36 3 which registers with the hole 31 in the hub 3| at all times, but can be engaged or disengaged from the hole 38 within the hub or the eccentric 33 by the operator of the tractor in the following manner.

The pin 36 is fixedly secured to the flanged sleeve 39, which is movable longitudinally of the spindle 29, and is controlled by the yoke arm 40, which in turn is operated by the shaft 4| by a suitable lever 42, (Fig. 1). By operating the lever 42, the yoke arm 49 is turned and the flanged sleeve 39 is moved longitudinally of the spindle 29 shifting the pin 36 either out of engagement with the hole 38 or into engagement if so desired. The frame I is held from end movement by the connecting rod 43 and a slide comprising a flanged sleeve or shoe 59. The connecting rod 43 is pivotally mounted to the frame I at 44 and journalled to the hub 3| at 45. The shoe 59 is rigidly fixed to the frame I and spans an arcuate guide plate 51 that is curved on a radius from the axis of the spindle 29. Therefore, as the eccentric 33 turns and arm 35 moves with the eccentric ring or collar 34 thereon, the only movement that will be imparted to the frame 1 and the goose neck 8 will be an up and down pivotal movement about the spindle 29 with the shoe 59 riding on the guide plate 51. This movement oscillates the saw vertically while it is being reciprocated by the saw driving mechanism. When pin 36 is disengaged from hole or socket 38, yoke or frame I and guide support frame 20 remain stationary in a horizontal position, so that the head I and saw 23 are reciprocated horizontally without oscillating up and down.

Keyed to the outer end of the hub 3| is a crank 46, being counterbalanced at 4I, and pivotally mounted to the travelling head I at 46 is a connecting rod 49. The opposite end of connecting rod 49 as journaled to the crank 46 at 50. The sprocket 32 is driven by a chain from a power take-off shaft 52 connected to the power plant of the tractor by any suitable means. As the chain 5| revolves the sprocket 32 and hub 3| the crank 46 will be rotated reciprocating the moving head I by the connecting rod 49 operating the saw through the cut of the log B. If so desired the eccentric 33 may be engaged to oscillate or swing the goose neck 8 up and down causing the saw to oscillate on its reciprocating travel through the cut, or the eccentric may be rendered inactive discontinuing the oscillation of the saw assembly as it reciprocates.

We will now describe the means of raising and lowering the saw assembly into or out of engagement with the log. A block and tackle assembly 53 is connected to the saw frame 20 at its one end and to the upright support 54 at its opposite or upper end. The cable 55 of the block and tackle assembly 53 is trained about the hoisting drum 56 located at the rear of the tractor to raise or lower the drag saw assembly A and frame or arm I by hand or power with flanged sleeve or shoe 59 sliding on the arcuate guide plate 51. The frame I is guided in its travel up and down when the assembly is raised and lowered by the guide plate 51, which is secured to the frame 4 of the tracks and to the frame 58 forming part of the upright 54. The flanged shoe 59 is fixedly secured to the frame I and rides on the guide plate 51, thereby maintaining the frame I in parallel alignment with the tractor.

In the operation of our new and improved drag saw for tractors and in combination with tractors having bulldozers, both the bulldozer and the drag saw work in combination and this is the feature which we are desirous of claiming. The bulldozer is used to move the log into position and it is also used to hold the log down while the saw is reciprocated with or without oscillating through the cut, as seen in Fig. 1. Means is also provided on the bulldozer for hooking under the log, as illustrated in Figure 7, in the form of a pivotally mounted hook 60 which will slightly raise the log sufiiciently to eliminate binding of the saw. If it were not for the operation of the bulldozer in moving the logs about and holding them down, together with raising them, the operation of a saw on a tractor would not be practical in the woods.

With our new and improved drag saw we can cut down through a stump with one or more vertical cuts, then by bringing the bulldozer against each of these sections of the stump the same may be rooted out, which is a very important operation performed by the drag saw. Trees may be cut down with this saw by using the bulldozer to dig out a low portion of the ground surface and raise an opposite portion so that the tractor may be run thereon, causing it to tilt sidewise so that our saw can cut a sloping cut through a tree, felling the same.

There are many other operations too numerous to mention that the combination of the drag saw and bulldozer can perform.

We do not wish to be limited to the exact structure as shown in the drawings, as other mechanical equivalents may be employed still coming within the scope of our invention.

We claim:

1. In a material handling apparatus, the combination with a motor driven vehicle of a bulldozer pivotally mounted on the vehicle, a substantially horizontal drag saw operatively mounted on the vehicle adjacent said bulldozer, means on the vehicle for operating said drag saw, means on the vehicle for selectively operating the bulldozer to hold a log during operation of the saw, and means for lifting the log held by the bull- 5 dozer suificiently to prevent binding of the saw during operation.

2. In a material handling apparatus, the combination with a tractor of a bulldozer pivotally carried by and extending across the front of the tractor, a substantially horizontal drag saw movably mounted on the tractor for horizontal reciprocation and vertical oscillation and extending parallel to one side thereof and at one side of the bulldozer, means on the tractor for reciprocating said saw horizontally while capable of moving up or down, means operable at will and associated with said latter means for oscillating the drag saw vertically during its reciprocation, means for guiding the last-named means and drag saw in a vertical plane during the' oscillation thereof, means independent of the bulldozer and operating means thereof for raising or lowering the drag saw and connected means for reciprocating and oscillating the drag saw means for holding said means for oscillating the drag saw against endwise movement while permitting movement thereof up or down, and means on the tractor for operating the bulldozer to hold a log during operation of said saw.

3. In a material handling apparatus, the combination with a tractor of a bulldozer pivotally carried by the tractor, a substantially horizontal drag saw movably mounted on the tractor and at one side of the bulldozer, means on the tractor for operating said saw, means on the tractor for operating the bulldozer to hold a log during operation of said saw, and means including a hook pivotally mounted on the end of said bulldozer adjacent said saw for lifting the log held by the bulldozer sufiiciently to prevent binding of the saw during operation.

4. In a material handling apparatus, the combination with a tractor of a bulldozer pivotally carried by the tractor, a horizontal support mounted on the tractor for movement up and down, means for adjusting said support vertically, a drag saw horizontally reciprocable on said support to extend parallel to one side of the tractor and bulldozer and adjacent one end of said bulldozer, means on the tractor for swinging said bulldozer up or down in an are on its pivot to hold a log during operation of the saw, means on the tractor for reciprocating said saw horizontally on said support, means for holding said support against endwise movement, and means on the tractor for moving said support up and down intermittently to oscillate said saw as it is reciprocated.

5. In a material handling apparatus, the combination with a tractor of a bulldozer pivotally carried by the tractor, a support movably mounted on the tractor, a drag saw movably mounted on said support to extend along one side of the tractor adjacent one end of said bulldozer, means on the tractor for operating said bulldozer to hold a log during operation of the saw, means on the tractor for horizontally reciprocating said saw on said support, means on the tractor for oscillating said support vertically to oscillate said saw vertically as it is reciprocated, means for simultaneously raising or lowering the support and drag saw and holding the same adjusted, means for holding said support against endwise movement or reciprocation, and means on the tractor associated with said saw reciprocating means i and said support oscillating means for selectively controlling the operation of said support oscillating means for causing the operation thereof or to operatively disconnect the same to permit straight reciprocation of said saw independent of oscillation thereof.

6. In a material handling apparatus, the combination with a tractor of a bulldozer pivotally carried by the tractor, a substantially horizontal drag saw movably mounted on edge vertically on the tractor for vertical adjustment, horizontal reciprocation and vertical oscillation at one side of the tractor and bulldozer, means on and driven from the driving means of the tractor for horizontaily reciprocating said saw, means on the tractor for swinging said bulldozer vertically to hold a log during operation of said saw, and eccentric means associated with and operatively connected to the saw reciprocating means for selectively causing vertical oscillation of the drag saw during its reciprocation or to permit reciprocation thereof independently of oscillation, said latter means including a rotatably supported and driven member operatively connected to the saw reciprocating means, an eccentric rotatably mounted said member, a collar on the eccentric and having an arm, an ofiset yoke pivoted to the arm, a guide track rigid with the yoke, a head rcciprocable in the guide track, supporting the saw and connected to the saw reciprocating means, means loose on said member and connected to the yoke to restrain endwise movement thereof, an arcuate guide fixed on the tractor concentric to said member, a slide fixed on the yoke and movable on the guide, means to raise or lower the yoke, guide track and saw, and means to operatively connect the eccentric to the member to cause vertical oscillation of the arm, yoke, slide on the guide, track, head and saw as the latter is reciprocated, and to operatively disconnect the eccentric from the member whereby said arm remains stationary and the saw reciprocates without oscillating.

EDWIN E. HANSEN. CARL C. HANSEN.

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

UNITED STATES PATENTS Number Name Date 1,060,157 Brazier Apr. 29, 1913 1,309,781 School July 15, 1919 1,445,039 Pribnow Feb. 13, 1923 1,609,651 McMillan Dec. '7, 1926 2,128,864 I Umhoefer et a1 Aug. 30, 1938 2,332,526 Pehel Oct. 26, 1943 2,332,561 Drott Oct. 26, 1943

Images