US1871559A - Skip hoist - Google Patents

Description

Aug. 16, 1932. p, REED 1,871,559

SKIP HOIST Filed Sept. 27, 1929 4 Sheets-Sheet 1 Jhdentgn .PercidaZK. Reed P. K. REED SKIP HOIST Aug. 16, 1932.

Filed Sept. 27, 1929 4 Sheets-Sheet 2.

Int) erzZo r. .PercirJaZJf-Re w- TI/l/ flitorney,

P. K. REED Aug. 16, 1932.

SKIP HOIST Filed Sept. 27, 1929 4 Sheets-5heet 5 Aug. 16, 1932. REED f LE Z LSSQ SKIP HOIST Filed Sept. 27, 1929 4 Sheets-Sheet 4 Indenior: fercwaljiffleed;

Patented Aug. 16, 1932 tenses PERCIVALK. REED, or LLANERCH, ramwsyavanm, AssIGuoR To Arms conveyor.

COMPANY, or PHILADELPHIA, PENNSYLVANIA, A oonro'nar'ron or PENNSYL- VAN-IA SKIP HOIST Application filed September 27, 1929. Serial No. 395,493.

y invention relates to skip hoists, and it relates more particularly'to improvedineans for feeding material from the hopper to the cally stoppedwh'en a predetermined weight of the material has beende'livered to the bucket. l v v k A further object of my invention is to provide apparatus of the character-aforesaid, which is so constructed and arranged that V possibility of spilling of the material a-t the bottom of the hoist will be reduced to a minimum, c p l A further ObJGCt of my 1nvent1on is to pro- .-ide apparatus o f'the character aforesaid,

which is so constructed and arranged that the control switch for the operation of the b tmay be readily actuated whenapr'e- 2e weight of the material has been delivered "to the bucket.

' 45. further object of my invention is to provide apparatus of the character aforesaid, which is so constructed and arranged that pe e closing of the gate will be in sured whenever the bucket starts on its upward travel from its loading position at the 7 bottom 'of-the hoist.

A further object of my invention is to provide apparatus ofthe character aforesaid, w ich is'so constructed and arranged that poss l lit-y of smashes, due toim'proper on of the bucket, will be eliminated.

hoist. of novel mechanism for opening and v which' controls the delivery of the mater al from the hopper to the bucket. i Q Y The nature and characteristic features of my invention will be more readily understood forming. part hereof, in which spirit of my invention. ghe foregoing obJects in view, any in relation contemplates the provision, in a skip Figure 1 is a side elevation of the lower portion of a skip hoist, showing mechanism embodying the mainfeatures of my present invention, the bucket being shown in the loading position, and certain of the structural supporting members being shown in section and others being-omitted for clearness of illustration. I

Fig. 2 is a vetric'al, central, sectional View of the structure shown in Fig. 1; Y

Fig. 3 is arear elevation of the lower or gate portion of the hopper and the parts associated therewith;

Fig. 41 is a plan view of that portion of the mechanism which is adaptedto control the closing of the gate when a predetermined amount of the material has been delivered to the bucket;

Fig. 6 is anenla'rged detail view of the I latch mechanism;

Fig. 7 is an underneath plan view thereof; Fig. 8 1s an enlarged sectional detail View showing a device for limiting the movement of the gate structure at the closed position,

the section being taken on the line 8+8 of F ig; 5;; and z g I Fig; 9 is a view of a modified form of the latch mechanism. V .7 It will, of course, be understood thatthe drawings and description herein contained are illustrative merely, and that various modifications and changes maybe made in shown, 1'0 is the skip hoist bucket, which may be of any preferred shape. The bucket-"l0 is guided in its movement by wheels 11,

- mounted'upon an axle 12, which is secured to therear wall of the bucket near the top thereof. Another pair of wheels: 14 is; mounted upon an axle-15, secured to the under side of the bucket.- v

A bail structure 16 is pivotallyfconnected,

the structure without depart'ing from the I as at 17, to the side walls of the bucket. A11

extend upwardly in any desired direction,

according to the requirements of the particular hoist, the lower portions thereof serving to guide the bucket to the proper loading position.

A hoisting cable 22' is connected in any suitable manner to the cross strut 19 of the bail structure 16, whereby the bucket may be raised and lowered in the operation of the hoist. f

ward the bucket when the same is in the leading position. l Vithm the chute 24 there -is located a depending baflle plate 25, pref: erably weighted, as at 26, and hinged as at 27, 50 a portion of the chute 24.

The bafie 25, being weighted and pivoted as above described, serves to retard or thin out the flow of the material through the chute extend into the same. the cut out portion the bucket is provided with a reinforcing plate 84, which extends 24, while at the same time permitting the larger lumps to pass, thus preventing choking-of the outlet. The bafile- 25 also serves to prevent ricocheting ofpieces of the materialout ofv the chute when the material is being fed rapidly and in a thin stream through the hopper without having previously accumulated therein.

, Upon the under side of the chute 24 there is mounted a transverse. shaft, 29, and by means of this'shaft the side frames of the gate structure are journaledr The gate proper comprises a sector plate31, secured at its edges to the frames 30.

The frames 30 also carry an auxiliary chute 32, which in the loading position. extends forwardly from the lower edge of the bottom plate of the chute, to carry the material passing from the chute intothe bucket. vThe front plate of the bucket 10 is cut out as at 33, to permit the auxiliary chute 32- to Immediately below across the inside of the bucket..-

Each of the side frames 30 of the gate structure is provided with a rearwardly extending arm 35.

bar 36. The ends of the bar 36 extend beyond the arms 35, whereby counter-weights 37 of suitable mass may-be mounted thereon.

The massof the counterweights 37 is such that the gate structure normally tends to move to the closedposition about the" axis provided by the shaft 29. e

Mounted upon theunder surface of the The arms are connected :at their free ends by means of a tranverse 39, in which a rod 40 is slidably mounted.

engage the bar 36 which is carried at the ends of thearms' 35 of the gate structure,

serving to retain the gate structure normally in the open position whilethe bucket is being loaded. 7

, The'roller 42 is impelled to itsoperative position by means of a coil spring 45, which is mounted upon the rod 40. The coilspring 43 bears at one end against a portion of the bracket 39, and at its other end against the enlargedpo rtion 41 of the rod 40. Upon the lower end of the rod 40 there are mounted Y lock nuts 44.

The hopper 23 is provided-at its bottom .withan inclined chute 24, which extends to- It should here be noted that the tension of in the open position, but'on the other hand,

said roller may be' depressed whenever the gate structure is impelled to or from the open position, to allow the bar 36 to pass behind the same and be there retained.

v The bracket39 also serves as a means for supporting a pin 45, upon which aebel'l crank lever 46 is pivotally mounted. Interposed between the lock nuts 44 and'the lower end of the bracket 39- is a trunnioned .collar. 47,

which is slidablymountedon the rod40, and is engaged by one end of thebell crank lever .46., The other arm of the bell crank lever '46 is pivotally connected, as at .48, to one end of -fa connecting rod 49. The other end of the connecting, rod 49 is pivotally connected, as

*at 50, to a bracket member 51, which iscarried by a cross bar 52 of the weight determining device. I

of a pair of levers 53f The levers 53 are journaled by means of a transverselyextencb ing shaftr54. The shaft 54 is supported by means of brackets 55, which are in turn supported by means of rigid transverse beams:

56. The front ends of the levers 53 support a transversely extending shaft 57, upon which a pair of rollers 58 is mounted.

- The bucket 10is provided on its front wall with a pair of shoes 59, which are so positioned as to engage and bear against the rollthe bucket is in the loadingpoers 58 when sltion.

necting rod 49 is attached, also has pivotally The bracket member 51, to which the con- The cross bar 52 is carriedat the rear ends 9 connected therewith,1as :at 60, one end of a fixed bracket member. 65. Y

' Upon the freeendof theflever 63 counterweights 66 are adjustably mounted. The

free end of the lever 63 normally rests upon a a bumping block 67, which serves to limit the downward movement ofthe free end of said lever, said block beingsupported by means "-of brackets 68 secured to the beams 56.

Uponthe shaft 29,-by'means of which the gate structure is pivoted, there is also piv- -otally mounted a pair of arms 7 0, which extend along the sides of the frames 30 ofthe gate structure, and which are connected at' 10 their free ends by means of a transversely extending shaft 71. V 7

Upon the shaft 71' there is mounted a pair of rollers 72, whichareadapted to be en- 'gaged by the shoes 59 which are carried by the bucket 10. Upon the side frames of "the gate structure there are provided projectinglugs 73, upon which the arms 70 normally rest. I i V On each sideof the chute 24 thereis pro- -vided a device for arresting and limiting the movement of the gate structure when the same reaches the closed position. Each of these devices comprises a spring plate 7 5, one end of which is bolted, as at 76,130 the gg sideplates of the chute 24, and the other end of which extends outwardly therefrom,

' sition. The portion 77 of the plate 7 5 which J5 extends outwardly at right angles has secured thereto one arm of an an le bracket 78. The other arm of the angle bracket 7 8 engages a bolt 7 9, upon which a coil spring 80 is mounted, the coil spring being interposed be m tween the angle'bracket 78 and the side plate of the chute 24. The coil spring 80 tends to hold the springplate 75 in its normal position to engage frictionally the side frames 30 of the gate structure. 'Bythe foregoing ar- 6 rangement, the agate structure will'be held in the closed position, and accidental opene ing of the gate when the bucket is away from I the loading position will be prevented. Nuts 81 are provided on the bolt 79, servinn to Jermit ad'ustment of the outwardexis P l tension of the plate 75, whereby the frictional engagement thereof with the side frames 30 of the gate structure may beadjusted- By properly adjusting the nuts 81- on the bolt 79. the arrangement will be such that as v thegate structure approaches its closed positiongthesideframes 30 thereof Wlll. lirst'frictionally engage the spring plates 75, whereby tliemomentum of the gate structure will be decreased and the sh'ockminimiz'ed when the side frames finally impinge againstthe pfor- "tions 77 of the plate member 7 5, which are a bent. outwardly at right angles to form a'stop;

A control switch may-be fixedlymounted 05 in connection' with the weight. determining device, this switch havinga depending operating lever 91, the lower end of which carbe engagedby a finger 93 which maybe secured to the connecting rod 61, or: any other suitable moving part of the weight determining device, whereby the" control switch 90 may be automatically manipulated whenever the partswith which the connecting rod 61 is connected are caused to be actuated in the manner to be hereinafter more fully explained. I V i For the proper relative adjustment of the several parts, the connecting rod 49' may be provided with an adjusting turnbuckle 95, and likewise the connecting rod 61 may have interposed-therein an adjusting turnbuckle 9e Theoperation of the devicemay now be eX- plained. The bucket 10 being in the position shown in Figs. 1 and 2 of-the drawings, and V the gate being in the open position also therev in shown, the material willfflow' from the hopper 23 through the chute 24:. The material thus passing through the chute 24: will be retarded by the weighted and pivoted baffie 25, so that the normal stream of the maries a roller 92.- The roller 92 is adapted to.

terial will be defined by the lower edge of v the baffle 25, while at the same time any large lumps which may be in the material will be permitted to pass; and also, by means of the baffle 25, pieces of the material will be prevented fromricocheting out of the chute into the pit of the hoist, as frequently occurs when the hopper is empty and the streamof material is relatively thin and is passing rapidly through the hopperand chute.

It has been found in practice that, by the provision of the baffie arranged as herein described, substantial uniformity of the load},- in' the. bucketis' obtained, notwithstanding w variations inthe amount of material which may accu1nulate inthehopper during the periods when the bucket .is-away from the loadr ing' position.

When a predeterminedweight of the ma terial has passed into the bucket, the shoes 59 which bear against therollers 58 will cause the otherends of the levers 53'to be raised.

This motion will be transmitted by means of" the cross bar 52, through the connecting rod 49 to thebell crank lever i6. M Q g lVhe'n the bell cranklever 4:6 isthus actuated, the rod 40 will be depressedv against thetension of the spring 43, whereupon the roller 42 will be retracted from its engage- 1 merit with the bar 36.: The gate structure Wlll now be free, whereupon the counterweights 3'? will cause the gate to be moved about the axis provided by theshaft 29, and position the gate will be swung to the closed shown in Fig. 5 ofthe drawings. J As the auxiliary chute 32 forms component part of the gate structure, the same will be moved out of the path-of travel of the the gate is moved to the closed is. in the closed position;

It willbe noted that when the gate is swung tov the closed position, the rollers 72, which are mounted upon theshaft Y1, which in turn is carried by tlle arms 70, will be brought to such position as to be in the'path of the shoes 59 which are carried by the bucket. p

However, asthe arms 7O merely .rest upon the projecting *lugs 73, which extends from the side frames 30 of the gate structure,

said rollers may be swung sufiiciently about the axis provided by the shaft 29. so as not to interfere with the upward travel of the bucket, and-it will be seen-that after the shoes 59 have passed to a pointjto clear the rollers, the arms 70 will then return'by gravity to rest again upon the lugs 73,- so that the rollers will be in the proper position to be encountered by the shoes upon the return movement of the bucket.

' After the bucket has discharged its load,

in the customary manner, at the top of the hoist, and returns for another load, the shoes 59,in the downward movement of saidbucket, will encounter the rollers 72, 'whereupon, by reason of the arms 7 bearing against the lugs 73 of the-Side iramesBO of the gate structure, the gate structure will be pushed by the bucket to the open position,'*as shown in Figs. 1 and 2 of the drawings. The action above describedtakes place,'of course, upon each movement of the bucket to and from the loading position. j

It will be seen that the mechanism above described for causing the gate tobe closed will be brought into action when a predetermined weight of the material has been delivered to the bucket, the amount of said weight being determined by the mass and position of the weightsfiti, which arcadjustably mounted upon the free end of the lever 63, whicluas hereinbeforedescribed, is.

connected by means oftheconnecting rod 61 to the structure associated with the levers 53'.

It will also be seen that when the levers. 53 are actuated as'abovedescmbed, the finger the present application isnot'pa'rticularly f concerned, .thebucketmay be automatically 'nated.

.started uponits upward travelafter the same has received its'proper load.

It may here be notedthat, should the means for releasing the gate to, permit the same 7 to. swing to its closedaposition fail'to operate from any cause prior ito'the starting of? the bucket upon its upward travehno particular harm will be'do'ne, asthe horizontal edge of the cutout portion 33v of the bucket will engagethe auxiliary, chute .32 of the gate, structure, whereupon the gate willbe pulled i by the bucket to the closed position; :When

the action takesplace in this manner, the

bar 36 will be forcedover the roller 42,;causing the rod 40 to be retracted sufliciently l i against the tension of the spring 43, to permit the bar-36 to pass and the. gate structure thus freed. 7 1 j .;c-' 1 Inffact, in some instances, the connecting rod 4e9 and the bell crank lever 46 may be,. 5

omitted entirely, andthe closing of the gate 1 effected by theengagement of the bucket with the auxiliary chute 3 2$ Whenthe gateis closed by means ofthe bucket, as above described, it will be understood thatafter'thegtt) bar 36 has been released from engagement withthe roller 42, the counterweightsfi? will function inthe usual, manner to bring the gate structure to-"thevfully closed position, so that the partswillbe in the proper position tobeagain actuated uponthe return of thebucket. it will be seen that there is thus provided a novel, simple, and eiiicient' mechanism for loading the bucket from the hopper of a skip goo hoist structure, which-is so constructed and arranged that the flow of material from the hopper will be automatically stopped-when a predetermined weight of the material has been delivered to the bucket, inwhichlikeli- 5, 5 hood of spilling of the material at the bottom of thehoist will be ininimized',-in whichflthe 'controlswitch for-the actuation of the bucket may. be actuated, when the'bucket is loaded,

'in which positive closingof the gate will be insured whenever, the; bucket "starts on its upward travel from its loading position, and in which possibility of damage through improper operation of theibucket will be elimixlclaim: r

V hoist, meansfor loading the bucket comprising. a chute; -a gate structure "movably mounted-with respectto said chute I and having a portion adapted to 'extendggro across the end' thereof;'counterweights adapted to impel the f gate. "structure to the closed position; means for impelling the gate structure to the open position comprising shoes carried by the bucket, and "a deviceci adapted to be engaged by saidshoes as" the bucket descends to the loading position, said device engaging a portion of the gate structure and normally moving in unison there with :but adapted to be pushed by the. shoesziisition.

2. In a skip hoist, means for loading the bucket comprising a chute; a gate structure 7 movably mounted with respect to said chute and having a portion adapted to extend across the end thereof; counterweights adapted to impel the gate structure to the closed position; means for impelling the gate structure to the open position compris ing shoes carried by the bucket, and a device adapted to be engaged by said shoesas the bucket descends to the loading position, said device engaging a portion of'the gate structure and normally moving in unison therewith but adapted to be pushed by the shoes out of the path of travel thereof when the bucket ascends after the gate has moved toward or to the closed position; and a latch member independent of the means for impelling the gate structure to the open position, said latch member being adapted to retain the gate structure in the open position, i

and said latch member being retractable by a portion of the gate structure.

3. In a skip hoist, means for loading the bucket comprising a chute; a gate structure movably mounted with respect to said chute and having a portion adapted to extend across the end thereof; counterweights adapted to impel the gate structure to the closed position: means for impelling the gate structure to the open position comprising shoes carried by the bucket, and a device adapted to be engaged by said shoes as the bucket descends to the loading position, said device engaging a portion of the gate structure and normally moving in unison therewith but adapted to be pushed by theshoes out of the path of travel thereof when the bucket ascends after the gatehas moved toward or to the closed position; and a. latch member independent ofthe means for impelling the gate structure to the open position, said latch member engaging a portion of the gate structure when the gate is in the open position, said latch member being adapted normally to retain the gate in the open position but being retractable by a per-- tion of the gate structure when the gate structure is impelled in either direction.

4. In a skip hoist, means for loading the bucket comprising a chute; a gate structure movably mountedwith respect to said chute carried by the bucket, and a device adapted to be engaged by said shoes'as the bucket descends to the loading position, said device engaging a portion of the gate structure and normally moving in unison therewith but adapted to be pushed by the'shoes out of the pathof travel thereof when the bucket ascends after the gate has moved toward or to the closed position; a latch member independent of the means for impelling the gate structure to the open position, said latch member engaging a portion of the gate structure when the gate is in the open position, said latch member being adapted to retain the gate in the open position but being retractable by a portion of the gate structure when the gate structure is impelled in either and having a portion adapted to extend across the end thereof; counterweights adapted to impel the gate structure to the closed position: means for impelling the gate struc-f ture to the open position comprising shoes

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