US2928564A - Safety hoist - Google Patents

Description

g n a -K2 March 9 0 c. c. FIGGE 2,928,564

SAFETY HOIST Filed July 11, 1957 INVENTOR:

CAR/"POLL Q F/GGE BY WWW ATT'Y United SAFETY HOIST Carroll C. Figge, Batavia, Ill. Application July 11, 1957, Serial No. 671,270

13 Claims. (Cl. 214-628) out and engage the raised material pulling it'inwardly through a window or at the top of a roof. This is a dangerous practice not only for the workmen at the upper level since the material may be hot and in pulling it inwardly, the material may be spilled, making it hazardous at the upper level and also for other workmen at a lower level or on the ground who may be filling the buckets or other receptacles and operating the hoist.

The present invention overcomes these objections by providing a platform carried by the projecting support at the upper level having a pivoted member engaged by the bucket or a load which swings the platform outwardly below the bucket or load to receive the contents of the bucket or receptacle which is automatically discharged upon the platform in an inclined position which directs the material inwardly through a window or inwardly of the edge of a roof.

With this construction, it is not necessary for a workman to reach out for the load, to pull it inwardly, or to attempt to discharge or overturn a bucket, but the material is automatically discharged upon the inclined platform and is guided to the interior of the building or to a wheelbarrow or other load carrying means.

In connecting, hoisting, and disconnecting a bucket or other load carrying receptacle, an open hook on the end of a hoisting rope is usually engaged with a ring or loop at the top of the bucket, but is hoisting hot materials for roofing and other loose materials which are likely to spill or fall, it is a dangerous practice since the materials may injure the workmen at the upper levels as well as upon the ground.

In order to more safely connect a load receptacle, a safety hook construction is employed in which the handle, bail or support for the load carrying receptacle is connected to the hoisting rope by a safety hook which requires that the bail or handle be first inserted between parallel portions of the hook and then relatively raised and rotated to engage opposite hook portions and then dropped to the bottoms of the hook portions to prevent their accidental disengagement.

An important object of theinvention is to provide a platform normally out of the path of movement of a hoist receptacle which is projected below the receptacle after it passes the platform so that the receptacle may discharge its contents upon the projected platform without requiring that the receptacle be grasped and pulled in by a workman.

.A further object of the invention is to provide a plattes Patent ICC tion of turning and also in a relatively raised position.

Still a further object of the invention is to provide a pivotally supported platform in connection with an operating lever, one end of which projects in the path of a hoist, in which the platform is bodily projected from an inner position free from engagement with a hoisted load into an inclined position below the load to auto-' matically direct the contents of the hoisting bucket upon,

the inclined and projected platform when the upper projecting end of the operating lever is engaged.

A still further object of the invention is to provide a hoist with a safety double locking hook which may be manually engaged and disengaged by relatively raised, rotating and lowering the supporting bail of a bucket in order to effect double engagement or disengagement.

of one from the other.

Other objects of the invention will appear in the specification and are more apparent from. the accompanying drawings in which,

Fig. 1 is a broken elevation of a safety hoist in accordance with this invention as applied to a portion of a roof of a building;

Fig. 2 is a perspective view-of a safety double book as connected in Fig. 1, compressed for separating the hooks;

Fig. 3 is an end elevation of the hook as taken in a plane of the line 3--3 of Fig. 2; and

Fig. 4 is a perspective of a safety double hook which may be of heavier material with the hooks spread apart, and requiring no separation of the'hooks.

This invention provides a platform normally positioned within the walls of a building, but having a supporting part which extends into the path of a load outside of the building and above the platform so that when the projecting portion of the support is engaged by the load, it will swing the platform outwardly below the load in an inclined position, to direct the contents of a bucket inwardly of the walls or roof of a building so that a work- 7 man receiving the load is not required to lean outwardly from the building to direct the load inwardly, to cause the discharge of a load from a bucket, thereby freeing him and other workmen from any danger from heated or falling material and from accidental loss or spillage of the material itself.

Referring now more particularly to the drawings, a hoist in accordance with this invention is illustrated in connection with the side of a building 10 and a roof parapet 12 therefor by providing spaced vertical supports 14 (only one shown) in the nature of a scaffold having a connecting footpiece 16 at the bottom, a horizontal beam or beams 18 at the top, and an angular brace 20 or braces extending from the beam 18 to the support 14.

At the rear or inner end of the beam 18, there may be a stabilizing structure comprising a vertical support 22 extending to the floor or roof with an angular brace24 from the inner end of the beam to the lower portion of the vertical support and at the base of the support is a footing 26 to which sandbags or other weights may be applied in supporting the outer end of the beam if necessary.

At the outer end of the beam (or between adjacent beams) 18 are pulleys 28 and 30 over which a hoisting frope or .cable 32 is passed to support a load or bucket- Patented Mar. 15, 1960 or other receptacle. 4 p

When the bucket is raised, the oke 52 or the projeiiti'ng errata pi'dvide means for raising or lowerin the bucket etesete the; sideof a building' i V r At the inner sides of adjacent vertical posts 01 supports 14, a platform 34 is mounted for movement into and.

7 one iof the post supports 14' and the. lower" end of the chain" beingjconnected to a pi'n'oi'. projection 42 at cor responding spaced locations along each side so th'at when both chains are connected te opposite posts :4, theplat- .34 which has been moved in the meantime by such engagement with the upper endsof the'rigid mounting levers" 44 which swing upon the pivots 46;

In the reverse 'movementdf the bucket, after the load has been discharged, thefirst downward movement of the V bucket'releases the levers 44 at their upper ends which ter s will be suspended ey: the chains and willswing freely Be ween the supports.

Ne r t e rear ent er the platfo m 34;;iti enppertea,

at each side by a rigid lever each mounted intermediate it's ends at the inn r side: of one of the; supperts'l' t upon a pivot 46, he lower endh'eing eenneeted' by, vot 48 with the corresponding edge orthe platform 38. At the other end of the lever is'a projecting endS O which ex tends Beyond the side support 14 tn which it eonneeted and between the eerrespendingenae of these levers 44 may be a connecting yoke 52 through which thecable 32 passes somewhat freely but which is adapted to enga e the top or" upper supporting portions or a load bucket 36 endsof the levers are en a ed by the bucket which causes the projecting ends of the levers to move upwardly, swinging the inner end of the platform 34 outwardly upon theside chains 38. 'These chains being connected to plus 40 below the pivots 46 of the levers and on a smaller radius, causes the outer end of the platform to be swung upwardly when it is projected outwardly by the le'ver's 44. This locates the enter end or the platform below a bucket 36 or other receptacle at such an inclination that material disehar edjtheref o'rn will falldir'eetl upon the platform and downwardly thereon into a wheelbarrowv 54 or some other receptacle at the lower end of the partition within thewall or parapet 12 of the building.

v The inclination of the platform, both before and after its proj'ection may be varied to some extent by relatively shortening or lengthening ,the chain'38 and also by. pro vidi'ng'a number vof supporting pins 40 at different ele- \"atlO ii S on the'sides of the post supports 14 to corresponding'ly vary' the relative radius of curvature of the support of the outer end of the platform. Likewise the efieet'ive length or the levers 44 connected to the inner of the platform may be changedlby connecting the ivots 48in one or a nurnbe'rof pivot holes 56 near the lower end of each leveiti Any suitable receptacle for automatically. discharging a load therefrom may be employed in connection with the hoisting cable and the contact means or yoke 52 connectmg the endsf the lever 44 which is represented in the bucket 36' which has opposite shellportions 58 connected by a cross pivot 60 at the top to which the cable 32 or an extension 62 thereof is connected and each of the shells has an operating lever 64 opposite the pivot with' one arm connected to the shell and the other arm extending within a ring 66 through which the cable 32 or its extension 62 may project. The cable passes freely nect'in'g the shells of the bucket which willtherefore he f or ced open at the bottom when stopped at the completron at its raising movement, in a well known manner- ,1 to discharge the contents of thegbueket uponiheeplatform s in: Fig" thereupon swing downwardly drawing the platform inwardly and closing the opposite. shells of the dumping bucket. 7 Other types of discharging, receptacles may be used for discharging liquids or fluid materials by engaging a valve member upon. contact with the yoke 52 which opens the. valve in the bottom of the receptacle. The discharging receptacle forms nopartciular part of the present invention. A g

;In connecting the cable 32 to a bucket or other discharging receptacle, an'opposite double looped safety link as shown in Figs. 2, '3 and 4 is provided, one being of lighter metal which may be manually deflected asshown rents, and the other'bei i of heavier rnetal whieh sn easily flexed by hand. I I j In the hook shown by Figs. 2 and-31adouble loop 76 is formed intermediate the ends of a piece of stiff metal bar stock from whichoutwardly spaced parallel portions light spring action which tends to hold the parallel portions 7 2' apart and rtoih'dldl the hooked portions 74 together'iri close relation w'ith the extremities 16, extending over and partiallyioverlappingi the opposite hooked pertl On l I i V pressing inwardl'y'qon the parallel portions 72', inserting a cross bar; (er the link of a a le ns on 62) b e the hooked extremities raising the bar or link above the engagement with both ofthe' ked portion 74, and reversing these operations for disengaging the safety-hook from a bail member to which it is connected. The doubl loops 70] at the up er end or the, safety hook may haveLafiXed or .pe'nh'a'nj'ent connection asjindieat'ed in Fig. 2 with a cable 3-2, g I

s sto k ,ben si :the es ed s that it is. not easily'hentor me e safety hook sh; in Fig; 4, is made of heavier hair ape but elatively tiff o u a dyb and- In this safety neck, a doublehook 8.0 re ade intermediate ends 84 which is the final position im -this safety book the ends of a piece-of bar of stock and portions 82 extending theref om a e give a half twist between the double loop and the hooked" ends 84-so that the latter are erma ently spaced apart substantially the Width or slightly rnore than a bail or bar "86 which is to be connected to the hookcdends.

Each heek'ee end hasa bent extremity ss turned dawnwardly and outwardly so that a space slightly, more than the width of a bar 86 'is opened between the bent exextrernities. t g

With this construction, a berystt is firsjtinserted be tween. the two hooked ends 84 entering at the position 1 a shown 'atFig'. 4, and then moved upwardly parallel with the hooked ends 84 to a position above" the bent extremities 881p theslmjsiitign '2. A The bar is then turned t a angl -0 sljg itts'am han 0" t p i ion fi ove yingand- ,beyon be. .te tr m ie eup th bar will clear the extremities andmay be moved down? Wardlv gp siti'oaq a d se ed n he ps of t e ho ks treniity 88 and thehool'ccdjend 8.4"of one of. the hooked i aadrg rsm wh ch the cannot. be diseng ged-except iththifs e'(21 iT' li n, a hail, handleror cross pivot 60 can y be e g ged. d se a e; rom. h ub hooked portions 74' by first separatingqtheseportions,

s earer by reversing the operation just'described. The advantage of this construction is that after a' bar or-bail as'86 is once seated in the double hooked ends 84, it cannot be disengaged by accident or inadvertence and even if turned, raised or twisted, the downwardly bent extre-' or other receptacle and the lifting cable 32 prevents ac'ci-.

dental disengagement of the receptacle-even though'there is a contact engagement between the. receptacle and the supporting levers 44 to cause the operation of the platform 34. No bumping, turning or relative lifting movement is suflicient to accidentally disengage the double loop of the safety hook from its connection with thereceptacle. This contributes materially to the safe operation of a hoist of this kind, it prevents accidental displacement and disengagement of a bucket or receptacle and provides means for quickly engaging different buckets or receptacles from the same hoisting cable when desired.

In actual erection of the supporting structure on a roof or in the floor of a building, the supporting and bracing parts are preferably made of wood or light iron, connected together at the joints by bolts which are easily attached and disengaged but the special relation of the supporting parts and such connection constitutes no material portion of the present invention.

While a complete safety hook hoisting apparatus for automatic discharge of materials has been thus described in some detail, it should be regarded by way of example and illustration rather than as a limitation or restriction of the invention as various changes in the construction, combination and arrangement of the parts may be made without departing from the spirit and scope of the invention.

I claim:

1. In a hoist for buildings, and the like, a beam extending at one end to project beyond the side of a building, means for supporting the projecting end of the beam in overhanging relation to a floor or roof level of the building, pulley means carried by the overhanging portion of the beam outside of the building, a load receptacle and cable means connected thereto and extending over the pulley means for raising material in said receptacle with respect to the beam, a platform and means for mounting it in free swinging relation with respect to said supporting means to swing into and out of the path of the load receptacle and including a lever pivoted intermediate its ends above the platform and engaged by the upper end of the load receptacle at the completion of its raising movement to bodily move the platform and swing the outer end of the platform upwardly into the path of and below the load receptacle to receive material discharged therefrom.

2. In a hoist in accordance with claim 1, a flexible and extensible support for each side of the front end of the platform which may be varied in length to swing the front end of the platform upwardly and below the load receptacle at different angles.

3. In a hoist in accordance with claim 2, said flexible and extensible means comprising a chain which is connected at its upper end to said supporting means and is connected at the lower end of the platform, the effective length of the chain being varied to swing the platform about different axes.

4. In a hoist in accordance with claim 1, the lever means having an arm in the path of the receptacle and engaged thereby and the opposite end of the lever having a variable pivot connection with the rear end of the platform to change the inclination of the platform when it is at rest and when it is projected outwardly below the receptacle.

5. In a hoist in accordance with claim 2, the said flexible and extensible means being connected to the front end of the platform and the lever means being connected to the rear end of the platform so that the platform is normally located out of the path of the receptacle, but is V mounted-by said flexible and extensible means upon a radius whichis less than the radius of the lever means so that the front end of the platform will tilt upwardly below the load receptacle at a greater angle than in its at rest position within the side of a building for receiving and directing material discharged from the load rece'pt'acle downwardly on the platform within the building.

6. In a hoist in accordance with claim 1, for buildings and the like, the load receptacle having its cable supporting means connected at the top thereof for engaging one arm of the lever and having a bottom'discharging means which is operated to open the discharge whenthe cable supporting means at the top engages the projecting end of the lever below the overhanging portion of the beam in the raising movementof the receptacle.

7. In a hoist for buildings in accordance with claim 6, the load receptacle having a support at the top and opening at the bottom to discharge material and a releasable connection between the top support and the supporting cable which is movable past the projecting end of the lever means without actuating it, the lever being engaged and actuated by the load receptacle support.

8. In' a hoist for buildings and the like, a beam extending at one end to project beyond the side of a building, means for supporting the projecting end of the beam in overhanging relation from a floor or roof level of the building, pulley means carried by the overhanging portion of the beam outside of the building, a load receptacle and cable means connected at the top thereof and extending over the pulley means for raising material in said receptacle with respect to the beam, a platform and means for mounting it in free swinging relation with respect to the supporting means to swing into and out of the path of the load receptacle and including a lever pivoted intermediate its ends above the platform and engaged'by the upper end of the loadreceptacle in its raising movement to bodily move the platform and swing the outer end of the platform upwardly into the path of and below the load receptacle to receive material discharged therefrom, the load receptacle having bottom discharging means operated to open the discharge when the cable means at the top engages the projecting end of the lever at the completion of the raising movement of the receptacle, the load receptacle bottom discharge means having opposite shell portions pivotally connected to the receptacle to swing open at the bottom, a lever having one arm attached to each shell and the other arm of each lever engaging within a ring through which the cable extends, the ring being of a diameter to engage the projecting end of the beam, the said beam having an opening through which the cable extends but through which the said ring will not pass so that the ring engages the projecting end of the beam to open the shells when the load receptacle is raised by its cable means to make contact with the projecting end of the beam, and a double safety link connecting the bucket and the supporting cable which extends freely through said ring and also is free from engagement with the projecting end of the beam.

9. A hoist in accordance with claim 8, in which the said connecting link has a closed double loop at one end with a fixed engagement to one of the parts which it connects and a pair of opposite hooks at the other end spaced apart to receive a supporting member of the other part which it connects, the hooks being rotated relatively to the supporting member to oppositely'engage both of them and the extremities of the hooks being bent oppositely over the opening of the hooks to prevent discon nection to the other part to which it is connected.

10. A safety link in accordance with claim 9 comprising a bar permanently bent intermediate its ends to form a double spring loop and the ends of the bar bent oppositely to form overhanging hooked extremities with intermediate portions between the hooks and the loops M 2 .1- A sa ty linkt tt m ic he im msha t ub ert pt ipg qe at: i n t t e. fllq ia ede s idi g mqd atq RQIZQQQSJQ pet 2- Ai tat e y' nk st -t q u et 11, n. whi h he aiq wi t 2 Q n zmsq e i ns: atr a an l s 9; mm t elp flm s mast be r 993 92 he. ,i n 0...

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