The present invention relates generally to a front load refuse collection vehicle and, more particularly, to an apparatus for, and methods of, refuse collection including a receptacle lifter assembly associated with. the front end of the refuse collection vehicle for lifting and dumping the contents of the receptacle into an intermediate refuse collection container located at the front end of the vehicle, which is lifted and dumped into collection vehicle when a sufficient amount of the refuse is collected.
Front load refuse collection vehicles are in wide use in large-scale residential refuse collection. Typically, front load refuse collection vehicle have a front crew cab, a large refuse compartment behind the cab, and a pair of hydraulic-powered lift forks extending in front of. the truck which are adapted to be inserted into corresponding slots or sleeves associated with a relatively large refuse collection container. The forks are then able to lift the refuse container over the front of the truck, invert container, and invert the container in order to dump its contents into the refuse compartment behind the cab.
For residential and small-scale refuse receptacle collection, the front load collection vehicle often carries the collection container in front of the vehicle as it moves along the street. This configuration allows the operator to dump smaller residential receptacles directly into the collection container before the containers dumped into the collection compartment of the vehicle. Typically, this has been a manual operation, with the operator parking the refuse collection vehicle near the receptacle, leaving the cab, and manually lifting and emptying the receptacle into the collection container. As can appreciated, this is unduly time consuming, labor intensive, and can lead to operator injury due to the repeated lifting of the often heavy refuse receptacles.
As a consequence, hydraulic receptacle lifters have been mounted directly to the collection container. Such collection containers with attached hydraulic lifters have been available from Perkins Manufacturing Company, assignee of the present application, since at least 1990. Other examples of collection containers with attached hydraulic lifters are disclosed in U.S. Pat. No. 5,333,984, which is incorporated by reference herein.
More recently, hydraulic lifters have been mounted on collection containers in a manner so that the lift can be mechanically moved into engagement with the refuse receptacle, rather than requiring the operator to move the refuse receptacle to the lifter, thus further reducing the labor required by the operator. Such systems are disclosed in U.S. Pat. Nos. 5,639,201 and 5,607,277, which are also incorporated by reference herein.
While the use of the systems described above has resulted in savings of time and labor, the known systems still have several deficiencies. Because hydraulic connections are typically required between the hydraulic system of the collection vehicle and the carrier-mounted lifter, these connections have been vulnerable to leakage and assorted breakdowns, requiring additional maintenance due, in part to the relatively large range of motion encountered by the container as it has moved over the cab to dump the contents thereof. The repeated lifting places additional stress of the hydraulic system and lines that has also required, in some instances, special designs to prevent the interference between the receptacle lifter and the lift forks for fork lift system of the collection vehicle.
Additionally, some of the container-mounted lifters are compatible only with a specific style of residential refuse receptacle, and are unable to handle containers of different styles. This can result in requiring several collection containers with different lifters for different collection routes, which results in added capital expense for additional equipment.
Accordingly, the primary object of the present invention is to provide an improved refuse collection vehicle and refuse receptacle lifter that results in more efficient methods of refuse collection.
A further object is to provide a refuse collection vehicle having an intermediate collection container with a refuse receptacle lifter that does not require a hydraulic connection between the vehicle and the collection container and the lifter.
Subsidiary objects are to provide a refuse receptacle lifter that can be used for lifting a variety of different style receptacles and to provide a lifter assembly that can be stored in an out-of-the-way position when not in use.
These objects, as wells as others that will become apparent upon reference to the following detailed description and accompanying drawings, are provided by an improved refuse collection vehicle, refuse receptacle lifter assembly, and combinations thereof, as well as methods of their use as set forth below. In the context of the present invention, the refuse collection vehicle includes a refuse receiving cavity, a collection container typically mounted to the front of the vehicle, and a lifter assembly. The lifter assembly comprises a refuse receptacle lifter for engaging, lifting, and inverting a refuse receptacle in order to dump its contents into the collection container. The refuse receptacle lifter is mounted on a transporter secured to the vehicle and located rearwardly of the collection container. The transporter is adapted to move the lifter in a generally side-to-side direction relative to the collection container in order to move the lifter between a retracted position and a position in which it is spaced from the collection container so that it can engage a refuse receptacle. The lifter is thus moveable in a generally linear manner from an initial position proximate to the collection container, to a second position for engaging the refuse receptacle spaced laterally from the collection container, and back to the initial position proximate to the collection container for dumping the receptacle. Because the lifter is attached to the vehicle, and not to the collection container, it is not subject to the repeated lifting required for dumping the collection container contents into the vehicle's refuse receiving cavity. Consequently, the hydraulic system is subject to less stress, and no special collection container designs are required.
In accordance with another aspect of the invention, the lifter may be moved to stored position generally adjacent. to the front end of the vehicle when the vehicle is not being used for residential or small receptacle collection. When the vehicle is used on a residential or similar route, the lifter can be easily moved to a working position spaced forwardly of the vehicle and laterally of the collection container.
As set forth in more detail below, the present invention is also embodied by a lifter assembly alone that can be attached to the front end of a front loading refuse collection vehicle. In general, such a lifter assembly may comprise a receptacle lifter for engaging, lifting, and inverting refuse receptacles, and a transporter for mounting in a generally transverse position at the front of the vehicle. The transporter carries the receptacle lifter and is moveable generally side-to-side, so as to move the lifter between a refuse receptacle engaging position and a receptacle dumping position.
The invention is further embodied in a method of refuse collection. First, a refuse collection vehicle, collection container, and lifter assembly, and transporter are provided as described above. Then the combination refuse collection vehicle and the collection container are positioned generally adjacent to a refuse receptacle. Next the refuse receptacle lifter is moved to a pick-up position. Then the refuse receptacle is engaged. Next, the refuse receptacle lifter and the refuse receptacle are moved to a dumping position. Then, the refuse receptacle is lifted and its contents dumped into the collection container. Next, the refuse receptacle lifter is moved to the engaging position to return the refuse receptacle to its original position. Finally, the refuse receptacle is released.
In each of
Turning to the figures of the drawings, there is seen in
The refuse collection vehicle 10 is provided with a refuse receptacle lifter, generally designated 16, adapted to engage and invert a residential-style refuse receptacle (not shown) in order to dump its contents into the collection container 12.
The refuse receptacle lifter 16 is designed is accommodate a variety of residential roll-out refuse containers and includes a carriage 18 having a pair a pivotally-mounted lifter or grabber arms 20. The grabber arms 20 are movable between a first, open position (e.g.,
The carriage 18 is mounted with respect to a base structure for movement between a first, lower position (
In keeping with one aspect of the invention, the lifter 16 is mounted to the front end of the collection vehicle 10 (rather than to, e.g., the collection container), so as to be movable between a first, stored position adjacent to the front end of the vehicle 10 (as shown in
To this end, the receptacle lifter 16 is mounted to a support member, generally indicated by 38, typically fabricated from steel tubing and plate that is pivotally mounted to a beam or extension member 40 in the form of a square tube slidingly secured to the front of the vehicle 10 (as will be discussed in greater detail below).
As best seen in
To move the support member 38 and lifter 16 between the stored position (
In keeping with another aspect of the invention, the lifter 16 is movable from its working position to a position spaced laterally from the collection container 12 (
To this end, the beam 40 is mounted with respect to the front end of the vehicle 10 on a track member, generally designated 46, so as to be movable generally linearly in the direction of the longitudinal axis of the beam 40 between the retracted position, (
As best seen in
To move the beam 40 between the retracted and extended positions, an hydraulic cylinder 64 is provided that has one end secured to the track member 46 and the other end secured to the beam 40. In practice, the cylinder has a throw of approximately 5 feet or 60 inches so as to permit lateral movement of the lifter of 5 feet between its retracted and extended positions. Again, other configurations for the structure of the track member 46 may be used without departing from the scope of the invention, such alternative structures being a matter of design choice well within the ordinary skill of the art.
The operation of the mechanism described above should be self-evident from the drawings. If the collection container 12 is to be carried by the forks 14 of the collection vehicle 10, the lifter 16 is pivoted away from the front of vehicle to the position shown in
The actuator mechanism 24 for the grabber arms 20 of the lifter may take any of the number of different configurations. A preferred embodiment for the actuator mechanism is shown in
Accordingly, the front mounted lifter and collection method have been disclosed that meets all the objects of the present invention. While the invention has been described in terms of certain preferred embodiments and method, there is no intent to limit the invention to the same. Instead, the invention is defined by the following claims.