US1909689A - Logging bummer - Google Patents

Description

May 16, 1933.

J. KUcHAR 1,909,689

LOGGING BUMMER v Filed NOV. 7. 1951 4 Sheets-Sheet l May 16, 1.933. 1 KUCHAR 1,909,689

LOGGING BUMMER Filed Nov. '7, 1931 4 Sheets-Sheet 2 May 16, 1933. .1 KUCHAR LOGGING BUMMER Filed Nov. 7, 1951 4 Sheets-Sheet 5 May 16, 1933. J. KUCHAR v LoGGING BUMMER Filed Nov. 7, 1931 4 Sheets-Sheet 4 Patented May 16,- 1933 UNITED STATES PATENT OFFICE JOSEPH XUCHAR, OF CHICAGO, ILLINOIS, ASSIGNOR TO ATHEY TRUSS WHEEL CO., OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS meente Bumm-Ja Application med November 7, 1981. Serial No. 578,574.

My invention is concerned with the provision of improvements in loggin bummers which are adapted to gather, an to receive and hold one end of, a log or plurallty of logs, to be dragged to a deslred location.

Among its objects, the invention contemplates various improvements m the construction, arrangement, operation and cooperation of those elements of the bummer whlch act to load and serve to support the logs.

The bummer herein described and subsequently claimed is characterized by the fact that it comprises a log supporting bunk movable on two axes, i. e. th@ bunk is movable on a horizontal axis to assume its load and movable on a vertical axis to facilitate direction changes in the travel of the bummer.

Other objects, advantages and capabllitles of the invention will appear from the f ollowing description of preferred embodlments thereof taken in conjunction with the accompanying drawings, in which Fig. 1 is a sectional view through a bummer embodying my invention, the same being hitched to a tractor;

Fig. 2 is a plan view thereof;

Fig. 3 is a rear elevational view;

Fig. 4 is a detail plan view, partly 1n section, taken on the line 4-4 of Fig. 3;

Fig. 5 is an elevational sectional view of a modified form of bummer embodymg the invention; and

Fig. 6 is a plan view thereof.

Referring to Figs. 1 to 4 of the drawings, the bummer preferably comprises a pair o track laying wheels 10 which suitably may be of the type described and claimed in Patent No. 1,435,788 issued November 14, 1922 to I. H. Athey. Each wheel comprises a beam 11 which receives a stud axle 12 which projects outwardly `from a web 13. lThe webs 13 "idepend downwardly from a transverse frame member 14 which suitably may `be a hollow beam. To the frame member 14 are secured horizontal frame members aor channels 15 which converge forwardly and give into parallel forward ends which are secured together and to a suitable draw bar 16. The draw bar 16 may be resiliently connected to the tractor 17 in any suitable way.

vided with an outer face 23 which is adapted to engage the flat end face of a bunk 24,

upon which the forward ends of the logs are adapted to rest. The bunk 24 is provided with a pivot 25 which extends into the bridge member 20 and permits the bunk to swivel in a horizontal plane when it is in its elevated or loaded position. The wedges 26 may be `inserted in slots provided by brackets 27 mounted on the bunk bridge member 20 to prevent such swiveling when desired, for example during loading.

Resilient means are provided which tend to maintain the bunk in normal transverse posltion. The bridge member 20` is preferably hollow and the resilient means may be located therein. As shown in Fig. 4, alinger 28 is mounted in the pivot 25 so that each end projects into the hollow housing 20. To these projecting ends are pivotally secured rods 29 which extend into tubular housings 30 which are pivotally mounted to the end walls of the bridge member 20. The outer f end of each housing 30 is closed by a threaded collar 31 through which passes the rod 29 and a sleeve 32 mounted thereon. The sleeve 32 abuts upon a washer 33 which normally rests upon the inner side of the collar 31, being forced thereagainst by a compresi sion spring 34.` The other end of the spring 34 abuts upon a washer 35 which rests on an annular rib 36 welded `or 'otherwise mounted upon the housing adjacent its end remote from the collar 31. On the adjacent end of the rod 29 is mounted a sleeve 37 which is held in position by means of a washer and nut.

When the bunk is displaced or rotated out of alignment with the bridge member 20, the

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rods 29 are either withdrawn somewhat from the housing 30 or are pushed further into the housings. In the first case, the sleeve 37 acts on the washer 35 to compress the spring 34 to a greater extent than it is normally compressed. lin the latter case, the sleeves 32 acting on the washers 33 have a similar effect. lt should be understood that the springs 34 are in an initial state of compression so that substantial force is necessary to deflect the bunk from its normal position.

At each end the bridge member 2O is pivotally connected to a forwardly extending link 38, the forward ends of which are interconnectedby a transverse bar 39. The transverse bar 39 carries a pair of rolls 40 located immediately on the inner sides of the links 33. rlhe bar 39 also carries a pair of rolls 41 located immediately within the inner sides of the rolls 40.

The webs 13 carry forward extensions 42 to which are ivotally connected the lower bifurcated en, s of a boom 43. rllhe boom 43 may suitably be fabricated from a pair of ll-beams which converge upwardly as shown in Fig. 3 and rovide an upwardly extending member w ich supports a sheave 44 at its upper end. A plate 45 is mounted upon v the upper bifurcated portions of the boom 43 so as to receive the impact of the log or logs as shown in lzig. 1, which impact results 1n a displacement of the boom, as will hereinafter be further explained. The rolls 4() carried by the bar 39 are adapted to ride upon the forward faces of the bifurcated elements of the boom 43, which elements have substantialy parallel portions to accommodate said ro s.

Supplemental longitudinal frame members 46 are secured to the transverse frame member 14 and extend forwardly. rlhe frame members46 and 15 are tied together by means of plates 47 and 48 secured to their under and upper sides respectively. The upper plate 4.8 projects laterally in front of the wheels 10, the projectin portions being provided with an arcuate ront face. 'lhe forward edge of the plate 48 is reinforced by an angle iron 49 which is curved to conform to the shape of the plate 48, to which it is secured in any suitable way, for example by means of rivets. The angle iron 49 and the plate 48 provide a bumper which deflects saplings and small trees laterally and prevents them from being bent down over the tractor by the wheels 10, with possible serious results to the tractor driver.

The rolls 41 are adapted to ride upon the upper surfaces ,of the frame members 46. The rolls 40 are in cam-like engagement with the forward faces of the l-beams which constitute the bifurcated legs of the boom 43. It will readily be understood that when the boom 43 is moved forwardly from the position shown in full lines in ig. 1 to the posi- Lmlg@ tion shown in dotted lines, the rolls 40 ride upon the legs of the boom 43 and the rolls 41 ride upon the frame members 46.

0n the inner sides of the rolls 41 the` bar 39 is connected to the rearward ends of telescopic casings 50, the forward ends of which are rigidly mounted upon the plate 48. The telescopic casings 50 contain compression springs 51 which normally tend to force the boom 43 into its rearward or elevated position and the bunk 24 into its lowest pos1tion, as illustrated in full lines in Fig. 1. The' rearward movement of the boom 43 is limited by a folding linkage 52 which connects the boom 43 with a bracket 53 carried at the forward end of the chassis adjacent the draw bar 16.

rlihe linkage 52 ma have a resilient connection with the brac et 53, a spring 54 being provided for that purpose. The spring 51 provides the forward stop for the boom 43, since it opposes such forward movement when the sprin is compressed solid. The bracket 53 provi es support for a roll 55 which is located adjacent windlass 56 mounted on the tractor 17 and adapted to be operated by the tractor engine. A cable 57 passes over the sheave 44, the roll 55 being adapted to be wound in or paid out by the windlass 56.

rllhe operation of the bummer is as follows. 'lhe tractor and bummer are brought to a suitable location adjacent the log or logs, exemplilied b the sin le log 58 so that the log lies practica ly straig t behind and preferably in alignment with the bummer. rlhe cable 57 is paid out and is hitched around one end of the log 58 or a plurality of such logs. The boom 43 is in its highest position, this being the normal position owin to the action of the springs 51. The wind ass 56 is then operated to draw in the line 57 so that the log or logs are dragged toward the bummer. ``When the log or logs approach the bummer their forward ends are elevated by the cable 57 so as to clear the bunk 24 which is in its low position. The employment of track laying wheels keeps the wheel supports of the bummer low so that there is no danger of the logs coming into engagement therewith.

When the drawing in of the cable 57 proceeds to a certain point, the log-or logs may contact with the boom 43 or the plate 45 mounted thereontwith the result that further drawing in of the cable 57 pulls the boom 43 forwardly against the action of the springs 51. This forward movement of the boom causes the elevation of the bunk 24 so that the same engages the log or logs adjacent their forward ends and the weight thereof is transferred from the cable 57 to the bunk 24.

After the load is then taken by the bunk 24, the cable 57 merely actsV as a tie to secure the logs to the bummer. When thus loaded the tractor may be started and the log or logs transported to any desired point trailing on their rearward ends. Since a considerable Elib@ lili@ part of the weight of the logs is supported on the bunk 24, the weight of the logs upon their trailing ends is substantially reduced and the frictional resistance opposed by this trailing is reduced to a reasonable extent. When the logs are loaded, the wedges 26 may be removed from their sockets so that the bunk 24 may swivel about its vertical axis 25 so as to facilitate relative movement between the logs and the bummer when corners are turned.

The logs may easily be unloaded from the bummer. All that is necessary is to loosen the hitch of the cable 57 around the log or logs and then move the bummer forwardly. During the removal of the logs the boom 43 elevates and the bunk 24 moves downwardly, this action being assisted by the springs 5l.

In the modification shown in Figs. 5 and 6 the bunk 24 is pivota-lly mounted within Y the transverse frame member or beam 14 and is not adapted to swivel on alhorizontal axis. The boom 43 is pivotally mounted on the chassis, as in the embodiment previously described. Iii this modification the bar 39 may be located between the bifurcated limbs of the boom 43 and its rolls 40 may suit-ably engage the inner side of the rear web, as shown in Figs. 5 and 6. l

It will be noted from Fig. 5 that the position of the sheave 44 is substantially higher when the boom is in its erect position than is the case Awhen the boom is in its lower position. This difference in' height is suiicient to insure vthe elevation of the log end above the bunlf24 and its deposition on the bunk when the boom moves forwardly.

Although the invention has been disclosed in connection with the specific details of preferred embodiments thereof, it must be understood that such embodiments are understood not to be limitable to the invention eX- cept so far as set forth in the accompanying claims. y

I claim:

1. A logging bummer comprising a chassis franie, a boom pivotally mounted thereon, means for guiding a cable at an elevated point on said boom, land a bunk mounted on said frame adapted to swivel relative to the frame in a fixed horizontal plane.

2. A logging bummer comprising a chassis frame, a boom pivotallymounted thereon, means for guiding a cablle at anelevated point on said boom, and a bunk mounted on said frame for movement relative to the frame on a horizontal axis/and for movement relative to the frame on an axis at right angles to lsaid horizontal axis irrespective of the positioiio'f the bunk in relation to its horizontal axis.

3. A logging bummer comprising a. chassis frame, a boom pivotallv mounted thereon, means for guiding a cable at an elevated point on said boom, a bunk mounted on said frame adapted to swivel in a fixed horizontal plane, and means to lock said bunk fr ed on said vehicle adapted to swivel said bunk about its horizontal axis.

5. In combination, a tractor, a trailer, said trailer comprising a bunk adapted to swivel relative tothe trailer about a horizontal axis` and relative to the trailer about an axis at right angles thereto, a boom pivotally mounted on the trailer, a line cooperating with said boom and adapted to be drawn in by the tractor, said line being adapted to be hitched to a log, so that same is drawn against the boom to swing the boom on its pivot, and means operated by said boom to elevate the bunk about its horizontal axis to engage the log.

6. A logging bummer comprising a vehicle, a bunk mounted thereon to swivel relative to the vehicle about a vertical axis, a boom pivotally mounted upon said vehicle adapted to swivel about a transverse axis, a line adapted to pass over the outer end of the boom and adapted to haul `logs and elevate the ends thereof, a plate on said boom adapted to receive the impact of the logs so as to deiect the boom forwardly, said boom being arranged so that said deiection causes the logs to be de osited on the bunk. 4 p

A logging bummer comprising a chassis frame, a boom pivotally/,mounted thereon for movement -in a longitudinal vertical plane, means for guiding a cable at an Aelevated point on said boom, a bunk mounted on said frame, behind said boom, adapted to swivel in a fixed horizontal plane, and means to lock said bunk against swiveling, the boom and bunk being located so that logs drawn in by said cable force the boom forwardly until they rest upon the bunk.

8. A logging bummer comprising a chassis frame, a boom pivotally mounted thereon, means for guiding a cable at an elevated point on said boom, a bunkgmounted on said frame for movement on a horizontal axis and for movement on an axis at right angles to said horizontal axis, and means for locking the bunk to prevent the latter movement.

9. A logging bummer comprising a chassis frame, a boom pivotally mounted thereon to swing in a longitudinal vertical plane, means for guiding a cable at anelevated point on said boom, a bunk adapted to swing about a horizontal axis, and means having a sliding engagement with the boom fonelevating the bunk when the boom moves forwardly.

10. A logging bummer comprising a chassis frame, a boom pivotally mounted thereon to swing in a'longitudinal vertical plane, means for guiding a cable at an elevated point on said boom, a bunk adapted to swing about a horizontal axis, a link pivotally connected to said bunk, means on said chassis frame adapted to guide the forward end of said link, and means on said link having a sliding engagement with the boom, whereby the bunk is elevated by the forward movement of the boom.

11. A logging bummer comprising a chassis frame, a boom pivotally mounted thereon to swing baekwardly and forwardly, a compression spring on the forward side of the boom tendingto force same rearwardly and absorb shock applied thereto, means for guiding a cable at an elevated point on said boom, and a bunk mounted on said frame adapted to swivel relative to the frame in a fixed horizontal plane.

l2. A. logging bummer comprising a chassis frame, a boom pivotally mounted thereon to swing baekwardly and forwardly, a compression spring on the forward side of the boom tending to force same rearwardly and absorb shocks applied thereto, means for guiding a cable at an elevated point on said boom, a bunk mounted on said frame for movement on a horizontal axis and for movement on an axis at right angles to said horizontal axis, and means directly connecting said spring and said bunk whereby the spring tends to move the bunk to its lowermost position.

lin witness whereof, l hereunto subscribe my name this 3rd day of November, 1931.

JOSEPH KUCHAR.

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