Патент USA US2405505код для вставки
Augn-6, 1946. A. J. KLEIDON_ LADDER HOIST ?led July 5, '1945 ' é (I. 7 2,405,505 Patented Aug. 6, [1946 2,405,505 UNIT o Ares .1‘ NT FFICE * 2,405,505 I LADDER HOIST ' Albert J. Kleidon, New Brighton, Minn. Application .l'uly 5, 1945, Serial No. 603,298 4 Claims. (01'. 187-10) 2 ' My invention relates to a load carrying truck to be used particularly combination with a lad der and has for its primary object the provision of such a device which can be utilized to vcarry comparatively heavy loads up and down the lad der with ease. ' supporting ‘end board It is secured to the forward ends of upstanding ?anges l3 so as to be in a position approximately at right angles to the side frame members 6. Journalled to the rear end of side frame mem bers 6, by means of a transverse axle 15, are a pair of laterally spaced wheels it which, as shown, are on the ‘inside of frame members 6 in a position to ride upon the upper surfaces of the side rails Another object of my invention is the provision of a truck and ladder combination which, when used on a roof, or the like, will climb partly on to the roof so as to facilitate removal of the items 10 E of the ladder I. ‘ carried by the truck. Near the front end of frame members 6 is an Another object of my invention is the provision axle 5? which spans the distance between the side of hoisting means for said truck. members 6 and projects laterally outwardly from A still further object of my invention is to pro each side thereof sufficiently atlB to provide a vide a device for the above purposes which is 15. journal for a pair of Wheels I9.' Also, journalled economical to manufacture, rugged in construc to axle ll‘ is a pair of wheels 20 which, as shown, tion, and easy to operate and maintain. are on the inside of side frame members 6 and 'The above and‘ other objects of my invention are spaced so ‘as to run upon the top surface of will become apparent from the following speci?~ side rails 2 of ladder I. cation and attached drawing. 20 It will be observed that the diameter of wheels‘ " Referring to the drawing, wherein like charac is‘ much less than the diameter of wheels 19, ters indicate like parts throughout the several the importance of which will hereinafter become views: apparent. It is also important that the diame~ Fig. l is a side elevation of my novel construc ter of the rear wheels [6 be considerably greater tion shown as being used on a roof, one position than the diameter of the wheels 20. of the truck being shown by dotted lines; Fig. 2 is a plan view of the truck; Fig. 3 is a sectional view taken on the line €i~—3 of Fig. 2; and ' Fig. 4 is a fragmentary perspective view of the winch. Referring with more particularity to the draw ing, the numeral l indicates a ladder in its en tirety, made up of laterally spaced side rails 2 and rungs 3. In Fig. 1, the ladder I is shown as I‘ having its lower end on the ground and its upper end resting against the eaves 4 of a conventional roof 5. My novel truck is shown as preferably having a load supporting frame comprising elongated, Referring now particularly to Figs. 1' and 4, the under surfaces of the side rails 2 of ladder l are provided each with a bearing boss 2| through which is journalled for rotation, a shaft 22 which projects out one side at 23 and has a crank 211 secured thereto. Secured to said shaft 22 for ro tation therewith, and adjacent each side of hear ing bosses 2|, are four enlarged guide ?anges 25 which prevent lateral shifting‘of the same. It will be observed that the guide flange 25 adjacent the crank 24 is provided with a plurality of circumferentially spaced peripheral notches 26. Pivoted at 2'! to the side of rail 2 of ladder l in a position so that its free end drops into engagement with slots 26 by action of gravity, is spaced parallel side members 6, which are con nected by a transverse connecting member ‘I in a pawl 28. the front, and another transverse member 8 in be wound thereabout by rotation of the same, is the rear. a rope or cable 29, the free end of which extends under the rungs of the ladder upward to a pulley Side members 6 are preferably, and as shown, matched and have depending guide por tions 9 near their front ends, and similar guide portions II) at their‘ rear ends. For the purpose of greater rigidity, and also for the purpose of providing load carrying supports, I provide a pair of transverse bars H and also a pair of crossed struts l2. As will be seen, members II and I2 are countersunk or otherwise made flush with the top surface of side frame members 6. The rear ends of side frame members 6 are pro vided with upstanding ?anged ends I 3, A load Secured to the rotary shaft 22, in a manner to member 30 which is located midway between the side rails 2 of ladder l near its upper end and which rotates upon a non-rotary shaft 3|. Shaft 3! is secured to the side rails 2 of the ladder in a plane substantially corresponding to the under surface of the same. This is made possible by supplementary end pieces 32 rigidly secured to the under surface of the side rails 2 at their up per ends. The extreme outer end of rope or cable 3 29 is secured to the truck at its rear end and 2,405,505 3 preferably to a screw-eye, or the like 33, con nected to the central portion of cross member 8. Operation When it is desired to transport loads up and down the ladder with my novel device, the truck This last mentioned feature is important be cause it enables the operator to remove this load from the truck without leaving the roof. Having described a commercial form of my in vention in compliance with Section 4888 of the statutes, it should be obvious that my invention is capable of various modi?cations and altera tions, all within the scope of the appended by dotted lines in Fig. l. The pawl 28, under the claims. action of gravity, will fall into one of the periph eral notches 26 in guide ?ange 25 and thus, by 10 What I claim is: 1. In combination with a ladder having par preventing further uncoiling of the rope or cable allel side rails, a load carrying truck, said truck 29, the truck will be locked against further down comprising elongated parallel side frame mem ward movement. A number of bundles or shin bers spaced apart a distance greater than the dis gles, or the like, may then be placed upon the tance between the side rails of said ladder, trans load carrying supports II], If and I2. The up— verse front and rear connecting members, a pair right end board 14 will prevent the load from of spaced wheels journalled to the rear ends of falling backward th'erebeyond. said side frame members and adapted to ride on To lift the load, the crank 24 is wound‘ in a the side rails of said ladder, a pair of wheels clockwise direction with respect to Figs. 1 and 4, thereby causing the rope or cable 29 to wind 20 iournalled to the front ends of said side frame - members and adapted to ride on the rails of said itself around shaft 22 and elevate the truck and ladder, and a pair of wheels also journalled to load to any desired position. While the truck is lowered on the ladder l to a position shown is on the ladder the large set of wheels IS on the back and the small set of wheels 20 in the front ride upon the top surface of the side rails 2 of v the ladder I. The diameter of the rear wheels [6 is much greater than that of the front wheels the front ends of said side frame‘ members and positioned laterally outwardly therefrom, the di ameter of said last mentioned pair of wheels be ing considerably greater than the diameter of the other pair of front Wheels. 2. The structure de?ned in claim 1 in which the pair of wheels located at the rear of said 20 for the speci?c purpose of decreasing the angle of the load carrying surface of the truck with re spect to the angle of the ladder, thus making it, 30 truck are considerably greater in diameter than the forwardly disposed pair of wheels located easier to keep the load on the truck in its ascent between the side frame members. up the ladder. 3. The structure de?ned in claim 1 in further It will be observed, that because the rope or combination with guide means associated with cable 29 is anchored to the back end of the truck said side frame members for preventing lateral at 33, and also because of the position of the shifting of said truck on said ladder. pulley 30 near the upper end of the ladder I, that 4. The structure de?ned in claim 1 in further it is possible to elevate the truck to a point where combination with hoisting means associated with the upper wheels leave the side rails 2 of ladder said ladder and said truck for raising and lower I so that the front end of the truck falls onto the roof 5. Of course, when this happens the 40 ing the truck along the rails of the ladder, and means for preventing lateral shifting of said truck large front wheels l9 bear the weight as the front as the same is moved up and down on said ladder. end of the truck travels the remaining distance on the roof. ALBERT J. KLEIDON.