AUTOMATED CONTAINER HANDLING SYSTEM FOR REFUSE COLLECTION VEHICLES

Abstract

A fully automated container handling system for a refuse vehicle is provided that utilizes a vehicle-mounted video camera which feeds video to a cab-mounted monitor to inform a driver of the location of a container of interest enabling accurate alignment of the vehicle. The system is operated by a single button in the cab and includes an extending, pivoting arm with a base equipped with a converging grabber to seize and empty the container. The base that grabs the container includes a sonar transducer that functions with a hydraulic system that operates the arm and grabber using a programmable logic controller (PLC) computer program to run the hydraulic controls.

Claims

1. An automated container handling system for a refuse vehicle comprising: a) a camera mounted on the vehicle for obtaining and transmitting real-time video images for locating containers to be emptied while the truck is moving; b) a monitor mounted in the vehicle for displaying the real-time transmitted video images of located containers to be emptied enabling accurate alignment of the vehicle with the container; c) a pivoting arm mounted on the vehicle, a base attached to and able to move along said pivoting arm, the base being equipped with a converging grabber for seizing and releasing aligned containers to be emptied, wherein pivoting of the arm extends and retracts said base laterally with respect to said vehicle; d) a sonar transducer unit mounted on the grabber for controlling an approach of the grabber to a desired proximity to a container to be emptied as said base is extended; e) a system for moving said base along said arm to empty a seized container; and f) a remotely activated control system for activating a fully automated cycle for operating the arm, base and grabber for emptying and replacing the located container.

2. An automated container handling system as in claim 1 wherein said control system includes a programmable logic controller PLC.

3. An automated container handling system as in claim 1 wherein said container handling system includes a plurality of hydraulic cylinders.

4. An automated container handling system as in claim 1 wherein said system for moving said base along said pivoting arm comprises a driven chain.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In the drawings

[0010] FIG. 1 is a side elevational view of a side-loading refuse truck provided with the automated container handling system of the invention;

[0011] FIG. 2 is an enlarged view of the container handling system depicted in FIG. 1;

[0012] FIGS. 3A-3C depict an approach and grabbing sequence using the automated system of the invention;

[0013] FIGS. 4A and 4B are fragmentary views showing aspects of the container handling system of the invention; and

[0014] FIG. 5 is a schematic illustration of sonar container targeting in accordance with the invention.

DETAILED DESCRIPTION

[0015] The following detailed description is intended to be exemplary of a preferred apparatus and method of utilizing the concepts of the present invention and is not intended to exhaustive or limiting in any manner with respect to similar devices and methods and other variations which might occur to those skilled in the art. The following description further utilizes an illustrative example which is believed sufficient to convey an adequate understanding of the broader concepts to those skilled in the art, and exhaustive examples are believed unnecessary.

[0016] FIG. 1 depicts a side elevational view of a side-loading refuse truck, generally at 10, incorporating the container handling system of the invention, shown generally at 12, mounted on the truck. The vehicle includes a chassis 14, a cab shown partially at 16 and wheels 18. The vehicle body includes a storage chamber 20 which is connected to a charging hopper 22 and a tailgate 24 which is pivotally carried by a pair of vertically operating hinges, one of which is shown at 26 mounted at the top rear of the storage chamber. The tailgate is operated to open and close by hydraulic cylinders (not shown) and the vehicle body in conjunction with the operation of the tailgate, is tilted by further hydraulic cylinders (also not shown), to discharge stored refuse. Operation of the tailgate and truck body are well known.

[0017] The automated container handling system 12 is best depicted in FIGS. 2-4B and includes a main arm 30 mounted to swivel about a support member 32 at the upper end and is attached to a base assembly 34 by spaced, pivoting members 36 and 38 that are operated by hydraulic cylinder 40 (FIGS. 3A-3C). The base assembly further carries a grabber assembly that includes opposed finger elements, one having split members 42 and 44 and the other is single opposed element 46. The base assembly is designed to traverse upward and downward along the arm 30 using a continuous driven chain 48. Hydraulic fluid and power are supplied through a hose and cable system at 50. FIG. 3C shows the grabber with a seized container. Other figures show the grabber in a retracted, open position. This gives the system a very narrow profile with regard to protruding laterally from the side of a refuse vehicle.

[0018] As best seen in FIGS. 4A and 4B, a video camera module is shown at 60 mounted on a member 62 attached to the vehicle behind the arm 30 and a sonar transducer is mounted on the base assembly at 64.

[0019] FIG. 5 is a schematic illustration of sonar container targeting in accordance with the invention. Sonar, of course, was originally an acronym for SOund Navigation and Ranging and is a well known technique that uses sound propagation to navigate, communicate with, or detect objects in water or air. The system used in the present invention is an active sonar system that emits pulses of sounds and listens for echoes. This has been found to enable very accurate location of refuse containers and thereby enables accurate automatic control of the container handling process.

[0020] As shown in FIG. 5, a container of interest to be emptied is shown at 60. The sonar unit sends out sound pulses 62 and senses echoes 64. As indicated, the use of a sonar system has been found to enable accurate operation of the grabber assembly relative to a container of interest to be emptied. As shown in FIG. 3B, an approach as close as one inch is repeatably possible with the system of the invention.

[0021] In operation, the video camera sends a continuous picture to a monitor mounted in the vehicle cab (not shown). The video depicts refuse containers alongside of the vehicle as it moves along a street or alleyway and the driver stops the vehicle when a container to be emptied appears on the monitor. The driver then activates a safety on/off finger trigger, or the like, on a joy stick installed in the cab next to the driver and pushes another button on the joy stick to activate the PLC program which controls the arm during the container emptying cycle. Joy sticks and triggers of the type described are well known and need not be described further to those skilled in the art.

[0022] The container emptying cycle is initiated with the arm in the stowed position. With the sonar operating, the arm pivots, extending the base outward toward the container until the sonar transducer indicates the desired proximity of the container just short of hitting the container. This distance might be as close as one inch (2.5 cms). The grabber is then activated to close around and seize the container. The arm then retracts and lifts and dumps the contents of the container into a receiving zone or charge hopper of the vehicle body. The steps are then reversed to return the container to the exact location where it was picked up, release the container and return the arm to the stowed or home position.

[0023] This invention has been described herein in considerable detail in order to comply with the patent statutes and to provide those skilled in the art with the information needed to apply the novel principles and to construct and use embodiments of the example as required. However, it is to be understood that the invention can be carried out by specifically different devices and that various modifications can be accomplished without departing from the scope of the invention itself.