US1736011A - Automatic unloader for elevators - Google Patents

Description

Nov. 19, 1929. s. OLSON AUTOMATIC UNLOADER FOR ELEVATORS 'Filed Oct. '14. 1927 I: l wv l l 7 I I O J04 F- llql I .l lllll Illlllllill /ll l l /II U JIIII. i

, ny i @w pf 5 casing showing the double'strand of chain SAMUEL OLSON, OF CHICAGO, ILLINOIS,

Patented Nov. 19, 1 929 r IPIATENT' OFFICE ASSIGNQRTO SAMUEL OLSON & COMPANY, OF

CHICAGO, rumors, A CORPORATION or ILLINOIS AUTOMATIC-UNLOADER FOR ELEVATORS Application filed October 14, 1227. Serial No. 226,087.

This invention relates to automatic unloading elevators and more particularly to improved construction,

the type adapted to unload at several points. The object of'this invention is to provide an wherein a plurality of individual loadsmay be carried on one tray of the elevator and be individually discharged at along the path of travel of the elevator. It consists in certain features andelements of construction in combination, as herein shown and described and as indicated in the claims.

In the drawings: 3 Figure 1 is a somewhat diagrammatic V18W of an. elevator embodying this invention, to-. gether with an outline of a continuous belt conveyor at its lower end for recelving'loads from the down run side of the elevator.

' Figure 2 is ahorizontal transverse section looking down at the unthrough the elevator taken on line, 2+2, Flg- -loading mechanism, ure 1.

. 17a Figure3 is afragmentary side view taken gether with a load ejecting arm in registra- .tion with one of the compartments.

the load ejecting arms -at,interva'ls, corresponding to the spacing of: the trays on the on line 3-3, Figure-1, inside the elevator supporting the tray of compartments to- Figure 4. is a fragmentary detail section of ,the'ratchet detent mechanism forv operating In-the-use-of elevators for delivering loads tovarious predetermined points. along the path of travel it, is frequently desirable to load onto one carrier several parcels to be de- ,livered at difi'erent stations along the path of 1 p 46 travel, durmg a single trip of the carrier; this requires only-one stop tion. In institutions, such as large hospitals,

' the charts or records of the patients are often.

kept in a main '.ofiice, and calls for the charts of several of the patients .bytheir attendants on the various floors are frequently made at the same time. This is-one class of service for which the presenticonstruction'is well adapted; I In the what diagrammatically an elevator comprisdifierent predetermined points.

for. the loading opera-:-

mally extending drawing Figure 1, illustrates some sition and the adj acentforward 'arm'extending a pair of endless chain belts, 1, trained over the usual head and foot wheels, 2 and 3, respectlvely. The casing for the elevator may be of any suitable construction. Cross bracing comprisingangle irons, 4, is attached to the walls of the casing for supporting the head and foot ends of the elevator proper,

' that of the trays. Each of the rods, 7, is I adapted to partially support a tray, 8, having a substantially horizontal base member, 9, extending outwardly from the'chain belts. The outer edge of the base memberis supported by braces, 10, extending obliquely and attachedat their lower ends to the inner sides of the chain belts. Each tray is provided with a plurality of load-carryingpompartments, 1'1, extendingtransversely of the tray, formed by upstanding partitions, 12, which are fastened to the base member, 9. These partitions, may be of U-shape construction, with their upper ends flanged outwardly for connection with the adjacent portions to form a rigid construction. 7 Each compartment is intended to carry an individual load to a predeterminedstation along the path of travel of the elevator. c a s At each floor level or other station-point, at which loads are discharged, automatic 'unloading mechanism'is provided, inside of the elevator for ejecting the load from the corresponding compartment of the tray, onto an inclined chute, 15, which discharges on to any suitable platform, herein shown as a table, 16. Each unloading mechanism comprises a spider member, 17, having four radially ex- I tending arms, 18, at approximately right angles to each other, one of said arms nordown-wardly in a vertical poing laterally into the path of travel of the Ice I 30 the said arm, to swing it in an upwardly di-. rection out of the path of travel, and simul-- taneously swinging the adjacent lowerarm elevator. Said spider is secured on a trans versely extending shaft, 19, with which. it

pivots in suitable bearing brackets, 20,- attached to the opposite inside "angle guide members, 5, at a point above the chute, 15, so that the lower path of the swing of the arms I is in approximate horizontal alignment with the to of said chute. It will be understood 4 that t ie spiders o'f'these various-unloading mechanisms are :mounted on their. shafts in position, so that the arms, 18, extend in alignment for ejecting the contents from the particular compartment carrying a load to be dischar ed at that point. 1

The c ain belts, 1, are provided with auxiliary cross rods, 21, at points above the trays,

each of the said rods having guide rollers, 6, to run between the angle irons, 5.

The'i'od, 21 is adapted to impinge against the under side of the forwardly extending arm of the spider as the elevator travels upwardly, thereby turning the spider so that the downwardl up to a position to project laterally into the path of travel of the elevator, for encounter with the next-cross rod, 21. An automatic deten't device is provided for each unloading mechanism adjacent the end of shaft, 19, for aligning the spider arms so that one of said arms shall always stand thus in horizontal positionin the path of'travel. All the rollers, 6, on the cross rods, 7 and 21', on the same side as the .detent mechanism are provided with relatively widebearing flanges, 22, for actuating the detent to release the shaft, 19, and permit the spider to be revolved.

Said detent comprises a ratchet member, '23,

- keyedto shaft, 19, near one end, having its outer periphery notched at 24, at 90 intervals. A combination member, 25, is pivotally connected to a depending lug 20 of the bracket 20, secured to the angle guides 5, and has a trip finger, 26, extending into the path of the flange, 22, of the rollers, so as to be' forced upwardly thereby, to disengage a pawl, 27 connected to member, 25, and formed for meshing in the notches, 24, of the ratchet,

23. The pawl is yieldingly held in-engagement by a spring, 28, connected to the outer end of the member, 25, and to an angle. guide,

5. It will thus be clear that the detent mechanism frees the spider to make a quarter turn "each timea flange 22, of the roller, 6, engages the trip finger and that the arms of the spider go through the discharging motion with the aligned compartment of the tray, each time a tray passes the unloading mechanism whether the compartment is loaded or empty.

The undersides of the, trays, which 'on the down run side of the elevator are the upper sides, may be advantageously'used to carry loads down to the originalstarti'ng or collecting point. 'A tray inpassing around the foot wheels, as indicated in dotted lines at the bottom of the elevator, will permit an easy dis.-

charge of a load on to the curved deflector plate, 29, for delivery onto a continuous belt, 30, which may carry these loadsto any desired point of discharge,'herein shown as a table, 31.

It is mechanically necessary to provide a slight clearance in the pockets, 11, for the ejector arms, 18, and if a paper should stand in the pocket in this clearancespace it might be missed by the ejector; therefore I prefer to make the bottoms of the pockets-.V-shaped or upwardly convex as shown at 12*,sothat the lower edge of a card orpaper. will-slide toward one side wall thus insuring that the paper will lean against the opposite wall and will thus stand 1n the path of the ejector arm, 18. I

I claim:

1. The combination of an elevator compris- I ing endlessbelt means with a tray carried thereby, upstanding spaced partitions dividing the tray into a plurality of compartments; and unloading means for the several compartments at different points respectively along the path of travel,'each.of said means comprising an arm dimensioned and mounted to ass between a pair of ad acent partitions;

a xed pivotal mounting for said means dis posed out of'the path of travel of the elevator and means associated with saidarm normally extending into said path and engageable with apart of the elevator for swinging the arm through one of the compartments to eject the contents thereof. 2. The combination of an elevator comprismg a continuous belt with a tray carried horiverse axis, one of said arms normally depending downwardly' in alignment with one of the compartments and an adjacent arm extending laterally into the path oftravel of the belt,'means carried on the belt, engageable with the laterally extending arm whereby to swing the downwardly depending arm between the adjacent partitions of the compartment for ejecting the contents thereof.

3. The combination of an elevator comprising acon'tinuousbelt with a tray carried horizontally thereby, upright partitionsspaced on the tray to form a transversely extending row of compartments, unloading means for 'no zontally thereby, spaced artitions dividing tray to engage the laterally extending arm and swing it upwardly, whereby the downwardly depending arm is swung outward be-' tween the partitions of the corresponding compartment for ejecting the contents thereof, the further upward travel of the belt serving to swing the last mentioned arm upwardly to permit continued travel of said tray. 7

' 4. In thecombination defined in claim 3, means'associated with said unloading means for maintaining said arms inproper relation for engagement with the actuating means on the belt. a

, 5. The combination of an elevator compris- I ing an endless belt with a tray projecting therefrom, upright partitions dividing the for discharging its contents horizontally, the bottom wall of such pocket being upwardly convex, slo' ing downwardly toward the side walls for t e purpose indicated.

8. The combination ofhan elevator which includes a tray subdividedinto a plurality of load supporting spaces and'automat'ic load ejecting means disposed at stations along'the path of travel of the tray, each positioned to register with a different space of thesame, for ejectinga load fromsuch space, whereby the placing of a. load upon any given space of the tray predetermines the station at which it will be discharged.

9. In the combination jdefined in claim 8,

tray into a plurality of compartments, un-

loading means for difi'erent compartments at different points along the path of travel,

each of said means including a spidermounted for pivotal movement,'said spider comprising radially extending arms at substantially right angles to each other, oneof said arms normally depending downwardlyin alignment with a particular compartment and an adjacent arm eXtendin laterally into the path of travel of the be t, means on the belt upwa'rdly of the tray for engaging said laterally extending arm and swinging it" upwardly,

whereby the adj acent downwardly depending arm is swung outward between the partitions of the said compartment for ejecting the contents therefrom, the further upward travel of the belt serving to swing the ejecting arm upwardly to permit continued travel of the tray, together with detent means associated with said .spider -for raising said arms in position for such cooperation-with said tray.

6. The combination of an elevator comprising endless belt means, a tray supported thereby, upstanding spaced partitions dividing said tray into a plurality of compartments, and automatic load ejecting means disposed at stations along the path of travel, each positioned to operate upon a load in a the placing o a load in a given compartment predetermines the station at which it will be 1 discharged.

prising a relatively narrow, vertically disposed and open ended pocket in which such ob ects may stand on edge, and an ejector member arranged-to sweep through the pocket difi'er'ent com artment of the tray, whereby said elevator including endless belt means and a plurality of similar trays, each subdivided into several load supporting spaces with a space of each tray positioned to register with the load ejecting means at each station. I I SAMUEL OLSON I

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