US1738272A - Industrial truck - Google Patents

Description

Dec. 3, 1929.

E. J. ABBE INDUSTRIAL TRUCK Filed Feb. 5, 1927 2 Sheets-Sheet l Dec. 3, 1929.

E. J. ABBE INDUSTRIAL TRUCK Filed Feb. 5, 1927 2 Sheets-Sheet 2 Syvum do@ da/mj QM@ Patented 3, 19,29

,UNITED STATES PATENT OFFICE owner? ar., mann or stavamo, omo, Assmnon fro 'ma nLwELL-ranxnn mo- Tmc comm, .or CLEVELAND, omo, a conroaanon or omo INDUSTRIAL franck appunti@ mea February a, 1927. mm no, icaosr. l

Ipllliisinvention relatesto industrial trucks, particularly to the type known as a tier litt truck, which embodies an upright'frame and u carrie e suitable for rece1ving a load and M niountc to traversethe frame to receive or discharge the load at various heights. n, The primary/ohio@ ofthe invention is toI provide n truth oli this character, but in which the upright tre is tiltable, with `power throwv mi out mechanism .which shall operate when the carriage has reached a'defnite position relative to the tramewithont regard'to whether or not the trame is tilted at .this time. v A further obj ect` is to provide a simple it power throw out mechanism which will o erate l'when the upri ht frame has beenti ted to a predetermine position as well' as when the carriage iemoved to.l a predetermined position... i

Furtherohjects and features ot the inven tion will loecome ap arent from the follow, g description relatm to the" accompanying drawings., The essential char' `jteristics are earized in the claims.

' ot an' industria truc with my invention incorporated therewith; Fig. 2 is a fragmen tary side elevation similar to Fig. 1 of the om in tilted position, the main portion of to the truck trarne. being broken away; Fig. 3 ie a partly diagrammatic view showing the `eelective operatlon' of the hoisting" motor on either of two hoistin drums; Flg. 4 is Yan electrical dia ram Ae owing a' convenient l tt switch adapta le to my invention for control- .lin the motor;v

"i n the use of industrialtrnelrs of the tier Ii littvtype it is -hi hly desirable to limit the,AA

l l movement ot the cad carrier or tier lift carf td nage by a power. throw out mechanism for stopping, or rendering ineffective, the' motor which'oerates to raise the carriage. To pro' vide suc a throw out device yis comparatively p eiple when the track way for the carriage is rigid on the truck frame. However, when the carrie e track-way is arranged to be tilted tron le arises in locatin the control.- ling trip or trigger for operating the power throw out mechanism at any deniteiposi- W tionand maintaining it in such-position reln the drawin s, Fi 1 is aA sideelevatnionv gardless of the tilting movementot the trachway. Cnc ot the purposes otrriyinvention vis to overcome this dimculty in a simple and (not shown) A similar truck maybe found j in the prior patent to Clyde EQochranNo, 1,538,168yissued May `19, 1925 The power 'for such a truck ma comprise' electric het teries located .in a attery housing 5 sur mounting the rear wheels. n operatorie platform is indicated at itA on which the operm ator maystandwithin reach of the various control levers shownv at the' left hand ci@ Fig. 1.

Intermediately of the twosete of wheels 'is shown a hoisting unit 10 comprising a motor 11` and aairfof hoisting Adrinne 12 and 13, one of whic l may he arranged to tilt an upright frame 'or traclxway an the other to' `raise or loweraoarrilage guided hy' the frame.,

The upright'frame as shown comprises a4 suitably raced frigid frame 'or lioom'member 15 having rearwardly extendin arms, one bein shown at 16 pivoted as at 1 to upstandf ing racketslS on` the'forward end of the v4truck frame 1.` The carriage or tier lift 220 may be mounted on suitable rollers, such as 21 an'd 22 which ride alon guiding members, such as for example ast e flanges of struc tural'channels or an les com' rising the skeleton of the upright rama. he carriage has aforwardly extending L shaped platform 23 to engage beneath a load.

The means herein shown for vraising and titl lowering the tier lift carriage includes the y hoistin mechanism, above mentioned, particular y the drum 13 about which is wound' a cable, such as 25 passing forwardly. over a sheave 26, thence upwardly to a sheave 2T, surmounting the upright frame, and then downwardly as at a to the carriage 20. rlhe means for tilting the frame-may comprise a cable attached to the drum 12 and passing upwardly over a sheave 31 attached to the upper end of the frame, the outer end of the cable bein secured as at 32 to on the main truck lframe.

l Convenient means for selectively control! ling the drums 13 and 15 from a single motor is shown in my prior Patent No. 1,688,131, issued October 16, 1928. Fig. 3 of thepresent drawings shows the essential elements of such a control, the drive shaft of the motor 11 bein connected by a beveled caring 33 to a sli able clutch sleeve 34 drivingly rigidI with one.- of the beveled gears. A shaft 35 is driven when the clutch 34 is in one position, the drum 12 being driven through a worin 37 on the shaft meshing with a worm gear 38 o n the drum. The other drum, namely 13, is similarly driven through shaft'40, worm 41 and worm gear 42. The clutch sleeve 34 may be moved from one position to another through suitable linkage including a bell crank 43 and link 44 near the rear end of the truck. The handle 45 at the very top oi the rear portion of the truck frame ma have suitable connections (not shown) with the bell crank 43.

A convenient location for a switch for energizing the motor 11 is near the rear of the truck, whereby 'if desired the switch may be easily controlled by both hand and pedal operated levers. Such a switch is shown at and may comprise the arrangement of contacts and brushes shownin Fig. 4, hereinafter more fully described. The switch, as shown, has a connection through a link 51 to an arm 52 pivoted at the rear of the frame and for the present it may be assumed that this is the only operatorls control for the switch. The switch may comprise a drum, carrying contacts such as 50, 50a', 50", 50c

- and 50". Current may befed'to the contacts 50* and 50b from a power unit, such as a battery B through conductors 55 and 56. The motor as shown has an armature A fed by current from the battery in a constant direction regardless of the on position ofgthe switch, while the current through vthe field F may be reversed by manipulation ofV the switch to reverse the direction of rotation of the motor. The field is connected b conductors 57 and 59 to stationary switc contaots 58 and 60, adapted to wipe across adj acent pairs of movable contacts 50'-50d and 50-50 respectively. The contacts 50a and 50 are shown as electrically connected, likewise the contacts 50? and 50d. Contacts 5Ga and 50" are virtually one contact, broken to provide for cutting-olf power to the armature in the position of the switch shown, and arranged to feed current delivered from the a hook rigid avenant battery through conductor 55 to the armature through the conductor 55 from which it returns to the battery through the conductor 56'.. With this arrangement when the drum is rotated to the left current will iow through the lield in one direction, and it may be assumed that this will drive the motor to raise the carriage or tilt the upright frame, depending on which one ofthe worm and gear mechanisms is rendered active through the clutch sleeve 34. lf the drinn is rotated in the opposite directions namely, clockwise, current will liow through the field in the opposite 'direction for either returning the frame to upright'position or for lowering the tier lift carriage. When the druni is in the position in Fig. 4, the motor will be idle.

The kick-oh or power throw out arrapgement comprises a forwardly extending ink 62 pivotally connected at one end, as at 61, with the switch drum and supported at its other endby a depending lever 63. Slidably pivoted to this lever 63 is another link 64 extending forwardly to a short depending arm 65 to which arm the frontend of the link 64 is pivoted at 66 coaxially with the pivot of the upright frame 15. In order that the upri ht frame when rotated about its pivot tot e left may operate the links 62 and 64 to throw of? the power l provide a collar 67 rigid on the link 64, a sleeve 68 slidable on the link 64, and a link 69 pivotally attached as at 69 to the member 16 of the frame 15 and connected with the sleeve. As the traine 15 is tilted as above mentioned the sleeve slides alon the link 64 until it engages the collar ,67 w ereupon an abutment 64 on the ,link 64 engages the arm 63 and thrusts the link 62 rearwardly, returning the switch to the od position as shown in Fig. 4.

To enable the carriage to throw ed' the power through the same linkage, 62 and 64, I provide a bell crank 70, pivoted as at 71 to the side of the frame 15 and connected by u link 72 to the short depending arm 65, and a link 73 extending upwardly from the bell crank to a bail 75 pivoted as at 76 to the sides of the frame 15. The bail normally rests on pins 7 8 (one being shown) rigid with the frame. The transversely extending portion 7 5a ofthe bail is positioned vin the path of the roller 21 and when the carriage 20, carrying this roller, is hoisted to its highest allowable position it will rotate the bail about its pivot and, through the linkage described, throw the switch to oi position.

As will be seen from Fig. 2 the frame 15 may tilt without moving the control links 62 and 64 until the sleeve 68 contacts with the collar67. It follows that the frame 15 may be tilted considerably and the carriage then hoisted, but the point in the travel of the carriage at which the ower is thrown o will be the same as if the rame were upright.

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ond guided toy the tmett ogn, t t ont; the treme, potten menno tot d etten@m the 9 L owen tonton-ont menno noooetnted nm the movente 'tnet'ewtttn ttnntt---ont moons beine; otmnged to Toe netnwhen the @nid toed engeggtng menne @nenes e noottion on the tmettttfey, espeett'tfe o'i' the tttted position thet'oot.

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@t tn n 'Kt/emette9 nn npttght ptoted ttnetn tney? o toed engngtnqg memtoet mounted to 'ttmetee the tt"nuetmtny9 potten hoist tmtdnp; eonneetono with the ttodtttmjp to titt tt ond eonneotitono with the eotdmemtoet to ennee onen ttewetsing movement, meonnmsm to intelet'npt the onploty ot ponen to the ttoiot, e tint". opetntivety connected to the meetmntsnn exams eotnoted by the toed engegtng mem-- toet' when moved to n loredetetmtned position, said menne being; positively eonneeted to mid link, ond o nnannoetnl attached to the tm'ct` WWW seid memtoet being stidotbty Supported tot? the tindt end ott'nnged to engoge en etant ment on solid tinln Wneteby tttting ot the trackway to a predetermined position actuates the power interrupting mechanism. Y 10.-In a truck, a frame, a tiltable track- .Way pivoted at one end thereof, electrically 5 oserated hoisting mechanism rigidly mounte on the truck frame, connections therefrom to tilt the trackway, a carriage mounted to traverse the trackway, connections between -the hoisting'mechanism and carriage lo to eiect such traversing movement, a control switch manually operable to energize the motor of the hoistin mechanism, a rod connected with the switc at one end and pivoted coaxially with the boom at the other end, carriage engaging means on the trackway and connections between said means and the pivoted end of the control rod for throwing the switch to off positionwhen the carria e reaches a predetermined position on ige trackway. 11. Icombination with a truck, a frame,- a power operated hoisting unit -mounted thereon carrying two drums, a tiltable trafckway mounted on said frame, means connct- 'ing the trackway to one of said drums for tilting the trackway, a carriage mounted'gto traverse the trackway, and means connecting the carriage with the other of said hoisting drums to .raise the carriage, manual means for throwing on the power to drive said dru'ms and means controlled either by a given tilting movement of the trackway, or a given raising movement of the platform for throwinglput said power. testimony whereof, I hereunto ailix iny signature. f

EDWARD J. ABBE.

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