US2403636A

US2403636A - Elevator

Info

Publication number: US2403636A
Application number: US555174A
Authority: US
Inventors: Chantland Alfred
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-21
Filing date: 1944-09-21
Publication date: 1946-07-09
Anticipated expiration: 1963-07-09

Description

July 9, 1946. A; CHANTLAND ELEVATOR Filed Sept. 21, 1944 2 Sheets-Sheet 1 R o mwv O N\:\ & m 3 mm QM; mm W a W 9N on 9, on \m N Nfi W 3 3 QM 1 W N N .IN.

fff i- July 9, 1946. A. CHANTLAND ELEVATOR Filed Sept. 21, 1944 2 Sheets-Sheet 2 INvENToR ALFRED CHANTLAN D Patented July 9, 1946 UNITED STATES Y PATENT OFFICE 3Claims. 1

This invention relates generally to elevators and in particular to a portable elevator adapted for use in warehouses to elevate bags, boxes and the like for stacking and storing purposes, and for elevating articles from a ground surface into a vehicle for shipment.

An object of this invention is to provide an improved elevator.

Another object of this invention is to provide an elevator which is capable of adjustment to and support in any position between substantially horizontal and upright positions.

Yet a further object of this invention is to provide an elevator which is light in weight, capable of being easily maneuvered to a desired operating position by one man, and compactly arranged and assembled as a complete unit within the dimensional confines of a main frame therefor.

A still further object of this invention is to provide an elevator capable of adjustable movement to a position inclined upwardly from its receiving end, and adapted to have its delivery end supported on the ground at varying distances from such receiving end.

A feature of this invention is found in the provision of an elevator adapted to be horizontally positioned for storage and handling purposes, and provided with adjustable supporting means for holding the elevator in an adjusted position inclined upwardly from its receiving end including an extensible horizontal frame pivoted at one end to the receiving end of the elevator. A pivoted frame is fulcrumed to the opposite end of the horizontal frame with its free end in bearing engagement with the under side of the elevator. On pivotal movement of the pivoted frame the inclined position of the elevator is changed, with the extension and contraction of the horizontal frame moving the fulcrum of the pivoted frame longitudinally of the elevator frame to prevent any downward tipping of the delivery end of the elevator.

Other objects, features. and advantages of this,

invention will become apparent from the following description when taken in connection with the accompanying drawings in which:

Fig. 1 is a side elevational view of the elevator of this invention, with certain parts broken away;

Fig. 2 is a sectional view taken on the line 2-2 in Fig. 1; v v

Fig. 3 is a fragmentary sectional view as seen onthe line3-3inFig.4; Y I

Fig. 4 is an end elevatlonal view of the elevator looking towards the left in Fig. 1;

I ably supported at each a substantially horizontal position surface since no part thereof extends below the Fig. 5 is a plan view of the elevator supporting means with the elevator removed for the purpose of clarity; and

Fig. 6 is a detail view of a ratchet and pawl device associated with the elevator supporting means.

With reference to the drawings the elevator of this invention is shown in Figs. 1 and 4 as including a main frame comprised of a pair of oppositely arranged upright side members ll. Rotatend of the elevator frame and between the side members are shafts H carrying gears l2 for movably supporting a conveyor including a pair of chains l3, operatively associated with the gears l2, and cleats or cross members l4 connected between the chains I3. The chains are slidably supported on a board member l5 connected between the .tops of the upright side membersv l0 and extended longitudinally of the main or elevator frame. As bst appears in Figs, 1 and 2 the upper ends of the upright side members I0 project above the top surface of the board member l5 and constitute side guides for the elevator conveyor.

The conveyor is driven by an electric motor l6 carried between the side members I ll substantially centrally of the elevator frame, and connected with the conveyor through a transmission system including a pair of shafts I 1 and I8 rotatably supported between the side members III in a longitudinally spaced relation between the motor l6 and elevator delivery end 28. The shaft l1 carries pulleys l9 and 2| located between the side members In, with the pulley 2| being beltconnected with a pulley 22 carried on the shaft 23 for the motor Hi. The pulley I9 is belt-connected with a pulley 24 mounted on the shaft I8. A second pulley 26 on the shaft in is belt-connected with a pulley 21. carried on the shaft II at the delivery end 28 of the elevator. The motor I6 is provided with a plug-in attachment (not shown) for connection with a suitable source of electrical supply.

From a consideration of Figs. 1 and 4, therefore; it is seen that the motor l6, conveyor, and transmission system connecting the motorwith the conveyor are compactly arranged between the side members It) and within the upright dimensional confines of the members Ill. The elevator is thus capable of being lowered and operated in on the ground level of the under side of the members ID.

The elevator is generally operated at an angle inclined upwardly from its receiving end 29 with the angle of inclination being dependent upon the elevation to which articles are to be lifted. when the elevator is not in use it is desirable that it be in a substantially horizontal plane to provide for its ready storage and convenient maneuverability without interference from any overhead obstructions.

In the present invention the elevator is ad-- justably movable for support between substantially horizontal-and upright positions by means including a horizontal frame having a pair of telescoping side units 3| arranged at opposite sides of the elevator frame. Each unit 3| includes a member 32 telescoped within a pipe member 33. The

members

32 and 33 are held in an adjusted position against relative longitudinal movement by the provision of a pin 34' extendible through the pipe member 33 and through a selected one of longitudinally spaced openings 33 in the member 32. The end 39 of each member 32 is of a flattened form and plvotally supported to the outside of a corresponding side member l on a shaft 31 carried between the side members l0 adjacent the receiving end 29 of the elevator (Figs. 1 and 2). Ends 39 are maintained on the shaft 31 by pins 35 projected through opposite ends of the shaft 31. The end 39 of each member 33 is of a flat form and supported on a tubular axle or pipe member 39 extended between the telescoping units 3 I Axle 39 is secured to the ends 39 by bolt assemblies 4| (Fig. 3).

It is seen, therefore, that the horizontal frame is pivoted on the shaft 31 adjacent the receiving end 29 of the elevator, with the telescoping units 3| positioned to opposite sides of the elevator and diverged outwardly from each other in a direction toward the axle 39 as best appears in Fig. 5.

Rotatably mounted at each end of the axle 39 is a ground-engaging wheel 42. A pair. of

wheels 43 adjacent the receiving end 29 of the elevator are rotatably supported at the lower end of a corresponding shank or upright support 44. Each shank 44 is extended through a bracket 43 carried on a member 32 adjacent its pivoted support 31. Adjustment of the elevator receiving end 29 relative to the ground is accomplished by the provision of longitudinally spaced holes 41 in a shank 44 adapted to receive a pin 48 which rests on the top surface of a bracket 43.

A pivoted frame, indicated generally as 49, is comprised of a. pair of oppositely arranged spaced members 5| each of which carries a closed U member 52 at one end adapted for pivotalconnection with the axle 39 (Figs. 3 and 5). The members 5| are connected together by

brace members

53 and 51 and converge inwardly toward their free ends 53 between which a roller 54 is rotatably supported. The elevator frame is receivable on the roller 54 between the free ends 53. which constitute stops or guides for retaining the elevator frame on the roller 54. Thus as shown in Fig. lthe roller 54 is in bearing engagement against the under side of the members l9 and on pivotal movement of the frame 49 is movable longitudinally. of the elevator frame over drum 59 and at its opposite end with a bracket 33 supported on a corresponding member 32 near its pivot 31. A ratchet 33a is mounted on the its complete length to vary the upward inclination of the elevator relative to its receiving end 29.

Pivotal movement of the frame 49 is accomplished by means including a pair of winding drums or pulleys 59 mounted on a shaft 59 extended between the members 5| and rotatably supported in

plate members

39 and 35 carried on the members 5| adjacent their free ends 53. A cable 3| is connected at one end shaft 59 adjacent the supporting plate 39 (Fig. 6) and is operatively associated with a pawl 34 pivoted at 33 on the supporting plate 39 and normally biased into an engaging position with the ratchet 33a by a spring 31. The shaft 59 is manually rotated by a handle or crank 38 mounted at one end thereof to in turn wind and unwind the cables 9| on the drums 59.

In the operation of the adjustable supporting means let it be assumed that the angle of inclination of the elevator is to be decreased from its full line position in Fig. 1 to its dotted line position also shown in Fig. 1. The handle 38 is operated to rotate the shaft 59 in a direction to unwind the cables 3| from the pulleys 59, with the weight of the elevator plvotally moving the frame 49 in a direction toward the elevator delivery end 29 to its dotted line position. This adjusted positionof the frame 49 is maintained by the ratchet and pawl mechanism 33a-31' which locks the shaft 59 against rotation.

As clearly appears in Fig. 1 only the guide portions of the ends 53 of the members 5| extend beyond the roller 54 so that regardless of the inclined position of the elevator no part of the pivoted frame 49 is extended beyond the top side of the member I9. As a result the pivoted frame 49 does not interfere at any time with the passage of articles upwardly on the conveyor. In some instances the roller 54 might engage the frame at a distance from the elevator delivery end 29 such that the delivery end will tip downwardly under the weight of articles being elevated. This condition is overcome in the present invention by the provision of the telescoping units 3|. Thus by extending the telescoping units 3| the fulcrum for the pivoted frame 49 is movable longitudinally of the elevator toward and away from its receiving end 29 whereby to vary the distance between the roller 54 and the delivery end 29. A solid and adjustable support is thus provided for the elevator frame at all inclined positions, while maintaining some overhang of the delivery end of the elevator relative to the frame 49 to permit an extension of the elevator over the stack of the articles being stored. It will readily be appreciated, of course, that the telescoping units 3| may be adjusted in conjunction with the pivoted frame 49 to incline the elevator at a desired angle.

By virtue of the spaced arrangement of the telescoping side units 3| of the horizontal frame the elevator is capable of being lowered therebetween to a substantially horizontal position,

limited by the axle 39, and with the units 3| positioned at opposite sides of the elevator.

From a consideration of the above description, therefore, it is seen that the invention provides a portable elevator which is of a compact and unit assembly, adapted to be adjusted and supported at an inclined position relative to its receiving end between substantially horizontal and upright positions, and with the supporting means at any adjusted position of the elevator being entirely free of the moving parts of the elevator and articles elevated thereby. Adjustment is accomplished by frame means including an extendible horizontal portion, and an upright portion in bearing engagement against the under side of the elevator and adjustable for up and down movement. By virtue of this double adjustment of with a winding 25 the frame means the elevator is capable of being 5 positively supported W any tipping movementwhileinaninclinedposition.

Although the invention has been described with respect to a particular embodiment thereof itistobeunderatoodthatitisnottebesol llmitedsincecbangesandmodincationscanbe made therein ina manner within the full in:- tended scope of this invention as defined by the appended claims.

Ielaim: 1. In an elevator comprising an elevator frame, adjustable means for supporting said elevator frame in an adjusted inclined position upwardlyfromoneendthereofincludingapairof horizontal telescoping units arranged at opposite sides of said frame and pivoted at one of their ends to said one end of the elevator frame, a shaft connected between the opposite ends of said telescoping units..a pivoted frame pivotallysupportcdonsaidshafameansatthefreeend of said pivoted frame adapted for bearing en- ,,.gagement with the under side of said elevator frame, and means for pivotally moving and h'oldin: said upri ht frame in a pivotally moved positiontovarytheangularinclinationofsaid elevator frame. with said'shaft being movable longitudinally of said elevator frame on actuation of said telescoping units to adjust the fulcrum for said pivoted frame longitudinally of said elevator-frame.

2. An elevator comprising an elevator frame including a pair of oppositely-arranged'upright side members, adjustable means for supporting said elevator frame inan adjusted position inclinedupwardlyfromoneendthereofincluding frame, and means for releasabiy' holding said pivoted frame in a mom position, with. longi tudinal adjustment of said horizontal frame moving the fulcrum forsaid pivoted frame longhtudin'ally of said elevator frame.

i8 3. In an elevator comprising an elevator frame,

means providing for the adjustable support of 'saidframeinsnypositionbetweenasubstantially horizontal position and a substantially upright position including a horizontal frame havin'g'a pair of telescopina side units arranged at opposite sides of said elevator frame, means pivotally connecting said horizontal frame at one endwithoneend ofsaid elevatorframe, apivoted Y frame fulcrumed at the opposite end of said honsontalframemeansatthefreeendofsaid pivoted frame adapted for-bearing engagement with the under side of said elevator frame, and

means for pivotally moving and holding said pivoted frame in a moved position, with the ggcontraction and expansion ofsaidtelescoping units providing for a movement of the fulcrum for said pivoted frame toward and away from I saidoneendoftheelevatorframe.