Automated trash truck having a front loading conveyor and method of use

Abstract

A truck for collecting trash from a trash container includes a body having a front, a main hopper, and a trash-receiving station disposed in front of the main hopper. A pick up arm assembly is connected to the front, so that the pick up arm assembly can selectively pick up the trash container and dump the trash into the trash-receiving station. A main conveyor moves the trash from the trash-receiving station to the main hopper. The pick up arm assembly can be easily removed from the front of the truck, and can be pivoted outward for maintenance purposes.

Description

TECHNICAL FIELD

The present invention pertains generally to trash collection, and more particularly to a trash collection truck that has a front mounted pick up arm assembly and conveyor.

BACKGROUND OF THE INVENTION

Trash collection trucks are well known in the art. One such truck is described in U.S. Pat. No. 7,553,121 which shows a truck having an intermediate trash collection container at the front of the truck. The intermediate trash collection container has an integral pick up arm assembly which extends outwardly to grasp a trash container. The pick up arm assembly then retracts and rotates to dump the contents of the trash container into the intermediate trash collection container. When the intermediate trash collection container is full, it along with the integral pick up arm assembly is rotated upward and backward to dump its contents into the main trash collection hopper.

BRIEF SUMMARY OF THE INVENTION

The present invention is directed to a truck for collecting trash from a curbside trash container. The truck has a side loading pick up arm assembly that grasps the trash container and then dumps its contents into a trash-receiving station that is immovable with respect to the chassis of the truck. A conveyor moves the trash from the trash-receiving station to the main trash collecting hopper of the truck. There is no need to periodically dump the contents of an intermediate trash collection container into the main hopper. The trash is continuously moved into the main hopper by the conveyor. The trash loading cycle time is thereby reduced permitting more trash pickups per hour.

The pick up arm assembly is mounted on the front of the truck. This mounting allows the sliding arm of the assembly to be made as long as the truck is wide thereby increasing the reach of the pick up arm in comparison to arms mounted on intermediate trash collection containers. This mounting also allows the pick up arm assembly to be pivoted away from the front of the truck on a side pin to obtain access to rear components for maintenance. If more than simple maintenance is required, the entire pick up arm assembly can be easily removed by pulling a side pin on each side and replacing the entire pick up arm assembly with another. The relatively expensive truck is then returned to service quickly while the high maintenance pick up arm assembly is repaired off the truck. A half-cab design positions the operator adjacent the arm and trash-receiving station giving him direct visual access to the trash entering the system which he can interrupt if necessary to remove toxic or otherwise unwanted articles.

In accordance with a preferred embodiment of the invention, a truck for collecting trash from a trash container includes a chassis, a body, a front, a main hopper, and a trash-receiving station that is immovable with respect to the chassis disposed in front of the main hopper. A pick up arm assembly is connected to the front of the truck, so that the pick up arm assembly can selectively pick up the trash container and dump the trash into the trash-receiving station.

In accordance with an aspect of the invention, the trash-receiving station that is immovable with respect to the chassis of the truck is disposed in fixed relationship with the main hopper, and a main conveyor moves the trash from the trash-receiving station to the main hopper.

In accordance with another aspect of the invention, the trash-receiving station includes a secondary conveyor which moves trash toward the main conveyor.

In accordance with another aspect of the invention, the pick up arm assembly is pivotally connected to the front of the truck, so that the pick up arm assembly can be horizontally pivoted outward for maintenance purposes.

In accordance with another aspect of the invention, the pivotal connection is effected by a pinned connector.

In accordance with another aspect of the invention, a pivotal connection having a pinned connector is provided on each side of the pick up arm assembly allowing the pick up arm assembly to be removed and replaced by removing and replacing two pinned connectors.

In accordance with another aspect of the invention, the pick up arm assembly substantially extends across the entire front width of the truck.

Other aspects of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevation view of a truck for collecting trash from a trash container in accordance with the present invention;

FIG. 2 is a top plan view of the truck;

FIG. 3 is a front elevation view of the truck;

FIG. 4 is an enlarged fragmented perspective view of area 4 of FIG. 2;

FIG. 5 is a front elevation view showing a pick up arm assembly in a lowered position;

FIG. 6 is a top plan view FIG. 5;

FIG. 7 is a front elevation view of the pick up arm assembly extended and grasping a trash container;

FIG. 8 is a top plan view of FIG. 7;

FIG. 9 is a front elevation view of the pick up arm assembly retracted and the trash container drawn toward the truck;

FIG. 10 is a top plan view of FIG. 9;

FIG. 11 is a front elevation view of the pick up arm assembly rotated and dumping the trash into a trash-receiving station;

FIG. 12 is a top plan view of FIG. 11;

FIG. 13 is a side elevation view of the main conveyor moving the trash from the trash-receiving station to a main hopper;

FIG. 14 is a top plan view of FIG. 13;

FIG. 15 is an enlarged view of area 15 of FIG. 3;

FIG. 16 is a top plan view of the pick up arm assembly removed from the front of the truck; and,

FIG. 17 is a top plan view of the pick up arm assembly horizontally pivoted outward to a maintenance position.

DETAILED DESCRIPTION OF THE INVENTION

Referring initially to FIGS. 1-3, there are illustrated side elevation, top plan, and front elevation views, respectively, of a truck for collecting trash from a trash container in accordance with the present invention, generally designated as 20. FIG. 4 is an enlarged fragmented perspective view of area 4 of FIG. 2. Truck 20 includes a chassis 62 and a body which has a front 22. Truck 20 also includes a main hopper 24 which receives trash 500 from a trash container 502 (also refer to FIGS. 13 and 14). A trash-receiving station 26 is disposed in front of main hopper 24. As used herein the term “in front of” means closer to the front 22 of truck 20. Trash-receiving station 26 is disposed in fixed relationship with main hopper 24 and is immovable with respect to chassis 62. That is, trash receiving station 26 does not move with respect to main hopper 24 and chassis 62 as is the case with the intermediate trash collection container of U.S. Pat. No. 7,553,121. In effect, trash-receiving station 26 serves as an entry portal for main hopper 24. A main conveyor 28 continuously moves trash 500 by itself from trash-receiving station 26 to main hopper 24 as shown by arrow 72. Main conveyor 28 includes a moving belt which transports trash 500 from the lower trash-receiving station 26 adjacent the trash receiving station bottom 58 up an upward angle to the higher entrance to main hopper 24. Main conveyor 28 also includes a plurality of spaced apart ribs 29 for engaging trash 500 and moving it upward. Trash-receiving station 26 includes a secondary moving belt conveyor 30 which moves trash 500 toward main conveyor 28 by itself as shown by arrow 74.

Trash receiving station 26 is defined by a front upstanding substantially vertical wall 50, a left side upstanding substantially vertical wall 52, a rear upstanding substantially vertical wall 54, and a right side slanted wall 56. Front wall 50 is coupled to left side wall 52 and right side wall 56. Right side wall 56 is coupled to front wall 50 and rear wall 54. The trash receiving station bottom 58 is coupled to front wall 50, left side wall 52, rear wall 54, and right side wall 56. Trash receiving station bottom 58 is substantially parallel to and fixed adjacent the chassis bottom 60 of the chassis 62 of truck 20. Front wall 50, right side wall 56, and rear wall 54 are substantially vertical with respect to trash receiving station bottom 58 which is horizontal. Right side wall 56 is slanted at an angle other than vertical away from trash receiving station bottom 58. Front wall 50 is toward front 22 of truck 20, left side wall 52 is toward left side 64 of truck 20, rear wall 54 is toward rear 66 of truck 20, and right side wall 56 is toward right side 68 of truck 20. The top of trash receiving station 26 is open.

Secondary moving belt conveyor 30 is positioned in trash receiving station 26 above and adjacent bottom 58. The upper portion 70 of secondary conveyor 30 is substantially parallel to bottom 58 and extends substantially between front wall 50 and rear wall 54. Main conveyor 28 is positioned at an upward angle with respect to the upper portion 70 of secondary conveyor 30 from adjacent secondary conveyor 30 to main hopper 24.

A pick up arm assembly 32 is connected to front 22 of the body of truck 20. Pick up arm assembly 32 is similar to that disclosed in FIG. 2C of U.S. Pat. No. 7,553,121, and selectively picks up trash container 502 and dumps the trash 500 into trash-receiving station 26 (refer also to FIGS. 5-14). Pick up arm assembly 32 is known in the art and includes (1) a pair of grasping arms 34 which grasp trash container 502, (2) a sliding arm 36 which selectively extends and withdraws the grasping arms, and (3) a rotating arm 38 which selectively rotates to dump the contents of trash container 502. Because it is mounted on the front 22 of the body of truck 20, pick up arm assembly 32 can substantially extend across the entire front width W of truck 20. As such, pick up arm assembly 32 can have a longer sliding arm 36 which extends the reach of the device (refer also to FIG. 7). That is, because of the longer sliding arm 36, the present invention is able to pick up trash containers 500 which are further away from truck 20 such as across a lane of parked cars on a curb. This is in contrast to U.S. Pat. No. 7,553,121 in which the width of the sliding arm is limited to the width of the movable intermediate trash collection container which is substantially less than the width of the trash collection truck and does not allow pickups across a lane of parked cars to a curb.

Pick up arm assembly 32 is pivotally connected to front 22, so that pick up arm assembly 32 can be horizontally pivoted outward for maintenance purposes (refer also to FIGS. 15-17 and the associated discussions). Truck 20 includes a half-cab 35 in which the operator sits that provides him with full visual access to the trash collection process which he can interrupt if something needs to be removed from the trash stream.

FIGS. 5-14 show the sequence of operations of the trash collection process. In FIGS. 5 and 6, pickup arm assembly 32 is placed in a lowered position wherein rotating arm 38 rotates as represented by the arrow from the storage position in FIG. 3 to place grasping arms 34 in position to engage trash container 502. In FIGS. 7 and 8, sliding arm 36 is extended as represented by the arrow and grasping arms 34 grasp trash container 502. In FIGS. 9 and 10, sliding arm 36 is retracted as represented by the arrow and trash container 502 is drawn toward truck 20. In FIGS. 11 and 12, rotating arm 38 rotates as represented by the arrow dumping the contents of trash container 502 into trash-receiving station 26. FIGS. 13 and 14 show main conveyor 28 moving the trash 500 from the trash-receiving station 26 to main hopper 24.

FIG. 15 is an enlarged view of area 15 of FIG. 3. Pick up arm assembly 32 is pivotally and removably connected to the front 22 of truck 20, so that the pick up arm assembly (1) can be easily removed and replaced (refer to FIG. 16), or (2) can be horizontally pivoted outward for maintenance purposes (refer to FIG. 17). The pivotal connection of pick up arm assembly 32 to front 22 is effected by pinned connectors. The pick up arm assembly has a first side and an opposite second side. Pinned connector 40 is on the first side and includes a pin 42 which when removed permits pick up arm assembly 32 to be separated from front 22 at the connection point. An opposite side pinned connector 44 having a pin 45 is on the second side and serves as a hinge. When pin 42 is removed from pinned connector 40, pick up arm assembly 32 can be horizontally pivoted (parallel to the support surface) outward about pinned connector 44 for maintenance purposes as is shown in FIG. 17. In this position the back side of pick up arm assembly 32 is accessible. Or pin 45 of pinned connector 44 can be pulled and the pick up arm assembly pivoted outward about pinned connector 42. When both pins 42 and 45 of pinned connectors 40 and 44 are pulled, pick up arm assembly 32 may be easily detached from front 22 for repair or replacement as shown in FIG. 16.

It is noted that in the figures the hydraulic lines and electrical cables which accompany pick up arm assembly 32 are not shown. These lines and cables restrict movement of the pick up arm assembly and have quick disconnects that are well known in the art. The quick disconnects are undone when the pick up arm assembly is pivoted for maintenance or removal.

FIG. 16 is a top plan view of pick up arm assembly 32 removed from front 22 of truck 20 by disengaging connectors 40 and 44.

FIG. 17 is a top plan view of pick up arm assembly 32 horizontally pivoted outward to a maintenance position. Pin 42 of pinned connector 40 has been pulled while pin 45 of pinned connector 44 is still in place so that pick up arm assembly 32 rotates about pinned connector 44.

In terms of use, a method for servicing a trash collection truck 20 includes: (a) providing a truck 20 for collecting trash 500 from a trash container 502, including:

• • a chassis 62;
  • a body having a front 22;
  • a main hopper 24;
  • a trash-receiving station 26 disposed in front of main hopper 24 that is immovable with respect to chassis 62;
  • a pick up arm assembly 32 connected to front 22, so that pick up arm assembly 32 can selectively pick up trash container 502 and dump its trash 500 into trash-receiving station 26; and,
  • pick up arm assembly 32 pivotally connected to front 22, so that pick up arm assembly 32 can be horizontally pivoted outward for maintenance purposes;

(c) horizontally pivoting pick up arm assembly 32 outward; and,

(c) performing maintenance activities on pick up arm assembly 32.

The preferred embodiments of the invention described herein are exemplary and numerous modifications, variations, and rearrangements can be readily envisioned to achieve an equivalent result, all of which are intended to be embraced within the scope of the appended claims.

Claims

1. A truck for collecting trash from a trash container, comprising: a body having a front and a chassis having a chassis bottom;a main hopper;a trash-receiving station disposed in front of said main hopper, said trash-receiving station disposed in fixed relationship with said main hopper and immovable with respect to said chassis, said trash-receiving station having: a front upstanding wall;a left side upstanding wall;a right side wall;a trash receiving station bottom;said front wall coupled to said left side wall and right side wall;said trash receiving station bottom coupled to said front wall, left side wall, and right side wall; and,said trash receiving station bottom substantially parallel to and fixed adjacent said chassis bottom of said chassis;a pick up arm assembly connected to said front, so that said pick up arm assembly can selectively pick up the trash container and dump the trash into said trash-receiving station;a main conveyor which continuously moves trash by itself from said trash-receiving station to said main hopper; and,a secondary conveyor above and adjacent said trash receiving station bottom which moves trash toward said main conveyor by itself.

2. A truck for collecting trash from a trash container, comprising: a body having a front and a chassis having a chassis bottom;a main hopper;a trash-receiving station disposed in front of said main hopper, said trash-receiving station disposed in fixed relationship with said main hopper and immovable with respect to said chassis;a pick up arm assembly connected to said front, so that said pick up arm assembly can selectively pick up the trash container and dump the trash into said trash-receiving station;said trash-receiving station having a trash receiving station bottom substantially parallel to and fixed adjacent said chassis bottom of said chassis;a main conveyor which continuously moves trash by itself from said trash-receiving station to said main hopper;a secondary conveyor which moves trash by itself toward said main conveyor;said secondary conveyor positioned in said trash-receiving station above and adjacent said trash receiving station bottom and having an upper portion that is substantially parallel to said bottom of said trash-receiving station; and,said main conveyor positioned at an upward angle with respect to said upper portion of said secondary conveyor from adjacent said secondary conveyor to said main hopper.