US2978126A

US2978126A - Transporting and dumping equipment

Info

Publication number: US2978126A
Application number: US678829A
Authority: US
Inventors: Burl D Chambers
Original assignee: Dempster Brothers Inc
Current assignee: Dempster Brothers Inc
Priority date: 1957-08-19
Filing date: 1957-08-19
Publication date: 1961-04-04
Anticipated expiration: 1978-04-04

Description

April 4, 1961 B. D. CHAMBERS TRANSPORTING AND DUMPING EQUIPMENT 2 Sheets-Sheet 1 Filed Aug. 19, 1957 INVENTOR 0. MIVIZEEIQS ATTORNEYS April 4, 1961 B. D. CHAMBERS TRANSPORTING AND DUMPING EQUIPMENT 2 Sheets-Sheet 2 Filed Aug. 19, 1957 INVENTOR aurz. a. axflmaflas,

M Imam;

ATTORNEYS 2,918,126., I LTRANSPORTING AND DUMPING EQUIPMENT Bur-1D, Chambers, Knoxville, 'ienrn, assignor to Demp- 1 invention relates to improvements in transporting and dumping equipment, and more particularly to such equipment as is used for picking up, transporting and dumping separate containers which are filled with refuse and other materials. j v 7 Pork trucks have been used heretofore for handling such containers, an example of which is set forth in the patent application of George R. Dempster et al., Serial No. 544,177, filed November 1, 1955 Such fork trucks have been'moresuccessful with containers-of'the drop bottom type, although these have been used also for containers of the tilt-type of :the character set forth in the patent of George R. Dempster, No; 2,281,183, granted April 28, 1942. a 1 v Such tilt-type containers usuallyareconstructed with A lifting pins atopposite endsithereof and frequentlyhave a bail. connected with the lower rear portion ofthe con- I tainer, pivoted thereto and extending somewhatupri'ght. When a fork truck is moved intoengagement with atilt type container of the character mentioned, the forks straddle the container under the lifting pins and, upon being moved upward,.rtheseforkslift the container to an elevated position and transport the same to a point of dumping. It has been thepractice hereto-fore torprovide a dumping hook on the hoisting mechanism in position for engagement with the bail, so that upon relative separation vertically of thedumping hookand lifting arms, the container is free to rotate on the lifting pins supported by the arms, to discharge the contents therefrom.

This rotary movement may be accomplished mechanically by an upward pulling action applied. to the bail or by lowering the arms relative thereto, as described more in detail in the aforesaid Dempster patent and application.

It is desirable with tilt-type containers to connect the bail pivotally with the bottom of the container forwardly of the back wall thereof; However, difiiculty has been encountered in the dumping procedure, due to the fact that the container will not automatically be restored to its upright position on the fork arms, but must be lowered to the ground until the lip on the container can be dragged by the truck as the shuttle is lowered to revolve the container to an upright position.

One object of this invention is to overcome this objection and to improve the dumping procedure involved in dumping a tilt-type container which has a bail pivoted to the bottom portion thereof.

Another object of the invention is to improve the construction of transporting and dumping equipment using a fork truck and a tilt-type containerby providing for the effective dumping of the contents from the container in an elevated position on the arms of the fork truck and wherein the container willbe restored automatically to an upright position. on the arms without the necessity for lowering the shuttle. p 1

Still another object of .the invention is to improve the construction of a container havingvabail pivotally: connected with the bottom thereof to provide for. the proper control of the container during the dumping procedure, in

, 2 1 cooperation with a pair of dumping hooks on the car riage engaged with the bail at the same time, so as to prevent outward swinging movement of the bail during the dumping action. 1

One embodiment of the invention includes a tilt-type container having a bail. extending upright from a point of pivotal connection with the bottom portion of the container and having vertically spaced points of connection with two separate hooks on the hoisting means engaged simultaneously so that upon dumping of the container the latter will be restored automatically to its upright position by the Weight of the container swinging on the lifting pins carried by the fork arms. In this way, better control is maintained over the dumping of the container and the latter can-be restored automatically and readily to its normal upright position, without the necessity for lowering thecontainer to the ground.

This embodiment of the invention is illustrated in the accompanying drawings, in which: I Fig.1 is a sideelevation of the transporting and dumping equipment and illustrating the parts in different positi n v r v Fig. 2 is an enlarged detail view of a portion of the container in dumping position and with the bail connected with dumping hooks;

Fig. 3 is an elevation of one of the bails with a connected portion of the container; and i Fig. 4 is a view at right angles thereto of said bail.

O The invention is shown, for purpose of illustration, asv applied to a fork truck for handling and dumping separate containers, in the manner generally described in the application of George R. Dempster et al., Serial No. 544,177, filed November 1, 1955, and using a tilt-type container of the character set forth in the patent of George R. Dempster, No. 2,281,183, granted April 28, 1942.

As set forth in the aforesaid patent application, the fork truck includes a suitable transport vehicle, preferably self-propelled and having one or more sets of steering wheels for controlling the direction of the vehicle. A motor vehicle chassis of this type is designated generally by the numeral 1, supported on ground engaging wheels 2 and operated by a suitable source of power under the control of an operator who is usually located within a cab or enclosure 3. I

Mounted at one end of the frame of the chassis 1 and extending upright therefrom is a pair of upright guides 4, which may be channels or the like and form a suitable upright track. The guides 4 usually are pivotally supported at their lower ends on the chassis 1 and are capable of swinging movement in a forward and rearward di rection relative to the chassis 1 under control of suitable power means, such as a hydraulic power device 4, that connects the track 4 with the chassis 1.

Operatively mounted in the track 4'is a carriage 5 capable of raising and lowering movement with respect to the track from a position substantially at or adjacent the ground level to an elevated dumping position, as shown in full lines in 'Fig. 1'. The carriage 5 supports a pair of fork arms 6, spaced apart at op osite sides of the vehicle in such position with respect thereto so as to receive the container between these fork arms. Any suitable means may be used for raising and lowering the carriage 5, such, for example, as the hydraulic hoists described in the aforesaid patent application of George R. Dempster et al., or the use of chains or other lifting means employed in connection therewith in a manner well understood in the art of fork trucks.

Also mounted on the carriage 5 is an elevator section, generally indicated at 7, capable of raising and lowering I movements with respect to the carriage, as described ,in

the aforesaid patent application of George R. Dempster,

Patented Apr. 4, 196 1 under control of suitable means, such as hydraulic hoists. Mounted on the elevator section 7 at vertically spaced points are upper and lower dumping hooks 8, pivotally supported at 9 on the elevator section 7 and extending downwardly and outwardly relative to said section. Each of the dumping hooks '8 includes a throat 10 to receive a portion of a bail therein, with a shuttle 11 pivotally supported on the body of the dumping hook 8 in position for closing over the bail and confining it to the throat 10.

A tilt-type container is indicated at 12, being of conventional form, such as disclosed in the aforesaid Dempster patent, No. 2,281,183, usually having an open top and enclosed lower portion and being adapted to discharge the contents therefrom by an upside down turning action of the container. Lifting pins 13 secured rigidly to opposite ends of the container may be engaged by the fork arms 6 for supporting the container during transportation and for dumping. The lifting pins 13 usually are located eccentrically with respect to the center of gravity of the body portion of the container 12 to permit rotation of the container for dumping and also permitting the container to be turned back to an upright position after dumping.

A bail is provided on the container 12, as indicated generally at 14. The bail 14 includes a pair of side bars 15, each of which is somewhat L-shaped with the short arms thereof extending underneath the lower portion of the container and hinged to the bottom thereof at 16. A recess may be provided, if desired, in the back portion of the container, as indicated at 17, to receive the bail 14 therein, although such a recess is not essential and the bail may be located entirely outside the rear wall of the container rather than indented therein. The side members 14 of the bail are connected together by cross bars 18 which extend between the spaced side members 15 and may be welded or secured otherwise thereto. These cross bars 18 should be spaced apart distances corresponding with the spacing of the respective hooks 8 so as to enter the throats 10 in the hooks simultaneously and thereby connect the container with the elevator section 7 of the carriage at vertically spaced points along the length of the bail 14. A brace plate is shown at 19 extending along the upper surface of the lower bar 18 and arranged tangent to a circle around the center axis of said bar, rather than directly extending toward the center axis, so as to provide a maximum space for engagement of the throat of the lower hook 8 with the bar and yet to reinforce the bar at that point. Gusset plates are shown at 20 adjacent the ends of the upper cross bar 18 for reinforcing the points of connection of said bar with the side members 15 of the bail.

An additional cross bar may be provided, if desired, between the side members 15 of the bail, as indicated at 21. Such additional cross bar would aid in bracing the side members and may be required for extra heavy loads, although such additional bracing bar may be omitted if not required.

In a manner well understood with equipment of this general type, it is the practice for the container 12 to be filled with refuse or other suitable material, separate and apart from its mounting on the hoisting unit. When it is desired to transport the container to a suitable dumping point, the vehicle is moved into supporting engagement with the container. With the fork arms 6 lowered to positions underlying the lifting pins 13 when the container is sitting on the ground or other suitable support, the hoisting means is operated to raise the carriage and thereby lift the container to a suitable height above the ground for transportation to the desired point of dumping.

With the container 12 raised to a desired elevation at the dumping position, the cross bars 18 of the bail 14 are moved into the throats of the dumping hooks 8, thereby engaging both dumping hooks simultaneously with the bail 14. Then, upon relative action imparted to the elevator section 7 with respect to the carriage 5, the bail 14 will impart an upward pulling action on the bottom of the container so as to rotate the latter on the fork arms 6 4 1 around the axis of the lifting pins 13. This will turn the container upside down for discharging the contents therefrom. At the same time, due to the simultaneous engagement of both dumping hooks 8 with the bail 14 at the vertically spaced points of the cross bars 18, the bail will be held in parallel relation with the carriage, thus preventing the bail from swinging out, thereby allowing the container to move away from the carriage in an uncontrolled condition. Thus, after the dumping action, the operation of the lifting means connected with the elevator section 7 will cause a reaction of the elevator section with respect to the carriage 5 which will cause the container to revolve about the axis of the lifting pins 13 resting on the fork arms 6, thereby restoring the container to its upright position supported on the fork arms. This enables the container to be transported to a desired point of refilling, without the necessity for lowering the container into engagernent with the ground, but the container is restored automatically through the action of the mechanism of the hoisting means to its normal upright position at the completion of the dumping cycle.

While the invention has been illustrated and described in one embodiment, it is recognized that other variations and changes may be made therein without departing from the invention, as set forth in the claims.

I claim:

1. In transporting and dumping equipment, the combination with a container having a bottom, opposite end and side walls, lifting pins connected with the opposite end walls, a bail pivotally connected with the bottom and extending substantially in upright position relative to the back portion of the container, of a hoisting device including fork arms in positions to engage under the lifting pins for supporting the container during transportation and dumping, and dumping hooks supported on the hoisting device at vertically spaced points thereon respectively engaging the bail to hold the bail against swinging movement relative to the hoisting device upon dumping movement of the container.

2. In transporting and dumping equipment, the com bination with a container having a bottom, opposite end and side walls, lifting pins connected with the opposite end walls, a bail pivotally connected with the bottom and extending substantially in upright position relative to the back portion of the container, of a hoisting device including fork arms in positions to engage under the lifting pins for supporting the container during transportation and dumping, an elevator section movably mounted on the hoisting device for raising and lowering movement relative to the fork arms, hooks mounted on the elevator section at vertically spaced points thereon, and means on the bail spaced to correspond with the spacing of the hooks in positions for simultaneous engagement with the hooks to hold the bail against outward swinging movement during dumping of the container.

3. A container having a bottom and end and side walls, means connected with the end walls for supporting the container for transportation and for dumping, a bail extending substantially in upright position relative to and adjacent one side wall, means hingedly connecting the lower portion of the bail with the bottom portion of the container, said bail having at least two vertically spaced cross bars connected therewith and extending horizontally in position for respective simultaneous engagement with dumping hooks on a hoisting unit.

4. In transporting and dumping equipment, the combination with a container having a bottom and surrounding walls, of a hoisting device having a vertically movable carriage with arm means for connection with the container to support the container on the carriage for transportation and for dumping, an upright bail structure connected with the container at the lower portion thereof, and means movable with respect to the, armmeans on the hoisting device at vertically spaced points for simultaneous detachable latching engagement with the bail structure for tilting the container and for holding the container in position on the hoisting device during dumping.

5. In transporting and dumping equipment, the combination with a container having a bottom and surrounding Walls, of a hoisting device having a vertically movable carriage with arm means for connection with the container to support the container on the carriage for transportation and for dumping, an upright bail structure pivotally connected with the container at the lower portion thereof, and means movable with respect to the arm means onthe hoisting device at vertically spaced points for simultaneous detachable latching engagement with the bail structure for tilting the container and for holding the container in position on the hoisting device during dumping.

6. In transporting and dumping equipment, thecombination with a container having a bottom and surroundink walls, of a hoisting device having a vetrically movable carriage with arm means for connection with the container to support the container on the carriage for trans? portation and for dumping, an upright bail structure connected with the container at the lower portion'thereof, and means movable with respect to the arm means on the for simultaneous detachable latching engagement with the bail structure for tilting the container and for holding the container in position on the hoisting device during dumpmg.

,7. In transporting and dumping equipment, the combination with a container having a bottom and surrounding walls, of a hoisting device having means for connection with the container to support the container thereon for transportation and for dumping, an upright bail structure connected with the container at the lower portion thereof, and having cross bars thereon at vertically spaced points, and dumping hooks on the hoisting device spaced apart corresponding with the spacing of the cross bars and hoisting device at vertically aligned and spaced points 7 simultaneously engaging with said cross bars for holding the bail against outward swinging movement during dumping of the container.

References Cited in the file of this patent UNITED STATES PATENTS 2,702,142 Jones Feb. 15, 1955