US1781480A - Operating mechanism for loading devices - Google Patents

Description

NOV. 11, 1930. gm s 1,781,480

OPERATING MECHANISM FOR LOADING DEVICES Filed May 19, 1928 2 Sheets-Sheet l NOV. 11, 1936. Y J H, SIRMANS 1,781,480

OPERATING MECHANISM FOR LOADING DEVI CES Filed May 19, 1928 2 Sheets-Sheet 2 Patented Nov. 11, 1930 PATENT OFFICE UNITED STATES JOSEPH'HARDMAN, SIRMAN S, OF STOCKTON, GEORGIA OPERATING MECHANISM FOR LOADING DEVICES Application filed May 19,

This invention relates to a loading device designed primarily for use on trucks, trailers, and the like, one of the objects being to providea simple form of attachment which i can be utilized for loading logs and similar articleson to a truck.

Another. object is to provide simple and 'eilicientmeans for converting reciprocating motion into rotary motion whereby, through the back and forth actuation of a lever, a winding drum can be actuatedto pull a flexible lo en 'a in element so as to direct a lo :3 a 2'3 23 D on to the structure to which the attachment is connected. U

1 With the foregoingand other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described J and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings,

Figure 1 is a side elevation of a truck having the present improvement combined therewith.

Figure 2 is a rear elevation showing the attachment applied to a truck and in use for loading alog onto the truck.

Figure 3 is an enlarged rear elevation of the attachment, the operating lever being broken away.

Figure 4: is an elevation showing the outer side of the attachment, some of the parts being in section.

. Figure 5 is a section on line 5-5, Figure 3. Figure 6 is a section on line 6 6, Figure 5.

Figure 7 is a vertical section through a modified form of gearing.

Figure 8 is a transverse section there- .7 through.

R-eferrmg to the figures by characters of reference 1 designates a standard having a base 2 whichcan be reinforced by a web 8. This base has a depending flange 4: adapted to lap one side ofthe platform P of a truck,

1928. .Serial No. 279,095.

trailer or the like while the base 2 rests on said platform. The base and the flange can be fastened to the platform in any suitable manner, as by means of bolts or the like. A head 5 is swivelled on the upper end of the standard and has a fork 6 in which is journalled a pulley 7.

Extending laterally from the sidesof the standard 1 are arms 8 supporting a shaft 9. These arms are spaced apart a sufiicient dis- 6 tance to receive between them a winding drum or Windlass 10 which is secured to and rotates with the shaft 9." One end of the windlass is in the form of a ratchet wheel 11. An-

other ratchet wheel12 is mounted for rotaextends between the drum 10 and the ratchet wheel l2 and has a central circular opening 16 in which is arranged a small gear 17. This gear is secured to and rotates with the shaft 9 and meshes with intermediate gears 18 which are journalled on pins 19 carried by the plate, 15. 1' These intermediate gears mesh" wit-lithe internal gear 14. 1

An operating lever 20 is mounted onthe 1 shaft 9 between one of the arms 8 and the ratchetwheel 12 and attached to one sideof this lever is abracket 21. .Between these bracket and lever 20 are arranged two loppositely disposed pawls 22 and 23 which are held normally drawn toward each other by a spring 24. The upwardly extending pawl 22 engagesthe ratchet wheel 12 while thew downwardly extending pawl 23 engages the ratchet wheel 11. A. detent25 is pivotally connected to the standard 1 and engages the ratchet wheel 11 so as to hold it against retrograde movement. i 1 Attached to the drum or windlass 10 is one end of a flexible hoisting element 26 which can bein the formof a cable, chain, belt or the like. This flexible element is guided over the pulley 7 and is adapted to be attached to 1min a counter-fclockwise direction, Thus, as v ;-"the..lever 20 1s osc1l-lated,.a continuous or subon to the platform. If the log is a shortone" only one attachment-suchfas=constitutes the present-invention need be provided. One or moreslrids 28 can be-usedr If, however, the log is a long one,'requiring the useofa trailer,

one of the attachments constituting this in VQllilOIlaWlll-bfQ appliedto the truck whileanp other attachment will be applied toithetrailer. After the flexible .elementsor element have .rotatedin accl'ockwisedirection and the fiXlr Qble element26 will be wound on the drum. The teeth of :thegratchet wheel 11 willof Icourse-slip under the pawl2'5 if the same is ibeenlooped 'aboutthe log L said log can be elevated-ontothetruck simplyby oscillating theEleverQO. When this lever moves upward- I 7 1y it transmits motion through the pawl 22 to theratchet wheel 121and motion isthus trans;

':mitted through thegearing 14,18, and 17 to theshaft 9 with the result 7 that I the drum or Windlass 10 andthe ratchet Wheel 11 will be inloweredposition. .However,'it-is preferred.

ratchet wheels by-t-he lever so that their operation'willnot beeinterfercd With-: When the 7 lever 20,-is imoved downwardly the pawl 23 will thrust against the-adjacent tooth of the ratch'etwheel ll'and'will cause said Wheel to fcontinue to :rotate in. a clockwise 'direction with the drum or -windlass-10 while at the comes unnecessary to utilize the'plate 15 as a support for the gears.

What is claimed is:

Mechanism of the class described including a shaft, a drum rotatable therewith, a ratchet Wheel forming a part of the drum, second ratchet wheel mountedfor rotationon the shaft andfhavingia recessin-one face, the wall of the recess constitutingan internal gear, a gear in the recess secured to the shaft, a stationary xm embe'r extending between the ratchet wheels, gears carried thereby and 'supported between 'and in mesh with the internal gear and the gear ontheshaft, the "teeth" of the two'ratchet Wheels'being pitched in opposite directions respectively, anaetuat- V ingilevermountedfor oscillation onthe. shaft, 7 oppositely extending pawls carried thereby,

andaresilient connection between thepawls for holding them normally ineng'agement with the respective ratchet wheels,and means engaging one of the ratchet wheel'svfor holdlngthe drum against retrograde novement.

Intestimony that I claimthe foregoing as .my .own, I have hereto afinedmy signature.

'JosErr-I THARDMAN SIRMA'NS. I

-.to;rai sethis pawl duringthe-actuation of the same-timethe ratchetwheel 12 will be moved i stantially continuous rotation-ofthe drum-or l windlassilO in-one directi'onwill be set up and l 'the;fleXible:-element 26,which islooped about the logL, will rollthis log upwardly along the skid-:or skids 28 until it assumes a position on 1 'the'platformP. At any'timeduring the opf eration'when it is desired to hold'the parts against retrograde movement, thepaWl Q5 c'anbe'swung downwardly into engagement withtheratchet wheel 11. i V i I Instead of using the gearing illustrated in "Figures; 5 ..and 6a modified structure as V ishown infigures'Z and 8 can be employed.

,1 511 .thisgmodifiedstructure a gear29fcorrev jspondingwith theflgear l7rotateslwith the j ratchetiwheel .1 14and meshes with gears 30i The teeth of each of these gears 3Qare inter I se'ctedjbyganannular groove 31 extending aroundiaismall gear 32 which, inturn, meshes r with thef ii'iternalfgeargfi in the form of a fiange extending inwardly ffrontthe ratchet I wheelg-l2frgWith [this arrangement it "be-' V

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