Refuse Chute
A refuse chute for a building assembled from a plurality of tubular chute sections, the chute sections being stackable in an end-to-end or end-wise nesting relationship and securable to provide an enclosed refuse disposal shaft, at least some of the chute sections having one or more openings in a side wall of the chute section, characterised in that a baffle each is associated with one or more of the openings, the baffle extending from the side wall into the disposal shaft and being preferably inclined such that there is an obtuse angle between the baffle and the opening with which the baffle is associated. A refuse chute section is also claimed.
The present invention relates to a refuse chute for gravity disposal of refuse from storeys of a multi-storey building such as during building construction or refurbishment.
BACKGROUND OF THE INVENTIONIt is normal practice on multi-storey building sites to provide for the removal of refuse from upper floors of a building by a refuse chute which defines a shaft whereby all types of building refuse may be dropped from the upper floors down the chute shaft to a container located at the bottom of the chute, eg at ground level.
Such chutes are usually assembled from individual tubular sections of circular or quadrilateral cross-section which are stackable to provide a height suitable to the specific building. The individual sections which, when in place, extend vertically along the building have one or more refuse inlet structures that enable a user to put refuse into the chute for gravity disposal. As such, conventional refuse chutes have many adjustable components to fit different floor heights in buildings, resulting in many pieces to be assembled. Also, there are a number of different refuse inlet structures, ranging from a simple opening or hole in a side wall of the chute sections, which may be covered by a flexible sheet material, to elaborate tilting chute assemblies.
UK Patent document GB 2,229,427 A shows a refuse chute that comprises a number of chute sections that join together end-to-end to provide the height of refuse chute required. Chute sections that are at the height of a floor of the building that will require removal of refuse have a refuse entry point provided. The refuse entry point is a sloped tubular structure attached to, and extending externally from, the chute section. Such entry point is at a fixed location on the chute section, so the refuse may need lifting or lowering to put it into the refuse entry point; this may prove to be an occupational health and safety hazard.
U.S. Pat. No. 3,627,090 discloses a refuse chute for a building comprising a number of sheet metal chute sections. Again, the chute sections that are at floor level are provided with an external refuse entry point. The refuse entry point is provided by an external funnel configuration with a bottom and side walls that extend outwardly from the chute sections into the building. The bottom portion of the funnel rests on the floor(s) of the building and provides support to the chute sections. The chute sections between the floor level chute sections are capable of telescoping so that the floor level chute sections can be adjusted to allow for the refuse entry point to be at floor level. The opening of the entry point may be covered by a flexible rubber flap.
UK Patent document GB 1,071,949 A describes a refuse chute fitted inside a multi-storey building for residents of the building to dispose of their refuse. The chute is made from pre-cast concrete tubular walls and has an inlet opening into which the refuse can be thrown. The inlet extends outwardly from the concrete shaft and has outer walls of concrete and a door which swings to allow sluiced passage of the refuse into the chute. There is one inlet per floor.
U.S. Pat. No. 3,709,345 describes a double passage silo chute which has a separate passage for service of the silo and discharge from the silo; the service passage being between the silo and the discharge passage. The separation of the service and discharge passages is achieved by a vertical wall. Within this vertical wall normally closed access doors are provided. When it is desired to discharge some of the contents of the silo, the access doors are pivoted about hinges on the lower horizontal frame of the door to form a passage from the interior of the silo. The contents of the silo travel over the access door and down the discharge passage.
Australian Patent document AU 682758, in the name of the present applicant, provides a refuse chute system having multiple refuse inlet positions per chute section. The unwanted inlets can be covered with removable plates so that, apart from the inlet opening(s) that remain functional, a continuous chute is provided. The refuse inlet extends outwardly from the chute and has a flat section which rests on the building floor, and then slopes to the chute.
It is an object of the present invention to provide a simpler refuse chute of the type above described, that is, a chute that is comprised of a number of discrete chute sections that can be assembled to provide an enclosed refuse disposal shaft having a desired height, selected ones of the chute sections being provided with access openings in their peripheral wall through which refuse may be introduced into the chute shaft for it to fall down the chute, and which chute assembly reduces the risk of injury to users of the chute by objects falling down from higher up the chute shaft.
A particular object is the provision of a safety structure in such chutes that allows a user to push refuse into the chute shaft with reduced injury risk from objects falling from a level above the insertion point.
A further object is to provide a chute inlet structure which allows the actual opening into the chute shaft to remain unobstructed and yet still minimise objects falling down the chute from a level above the opening to exit the chute shaft through that opening.
SUMMARY OF THE INVENTIONIn a broad form, the invention provides a simple refuse chute with an internal baffle system, for use inside or outside a building.
In one aspect, the present invention provides a refuse chute for a building assembled from a plurality of tubular (or duct-like) chute sections, the chute sections being stackable in an end-to-end or telescopic relation and securable to provide an enclosed refuse disposal shaft, at least some of the chute sections having one or more openings in a side wall of the chute section, characterised in that a baffle is associated with each one or more of the openings, the baffle extending from the side wall into the disposal shaft and being preferably inclined such that there is an obtuse angle between the baffle and the opening with which the baffle is associated.
The internal baffles provide protection from refuse falling from above, so that a user may safely put refuse in the chute at lower levels with minimal chance that refuse falling from above can harm them. It is desirable that the baffle length be equal to or longer than an average person's arm so as to protect the person and arm of the person from refuse falling from above.
Preferably, a chute section may have multiple openings along the height thereof, thereby providing different refuse insertion locations for disposal of refuse. So, for example, a person seeking to dispose of refuse does not have to bend over or lift it up to an opening location above floor level, and may instead use an inlet at a lower height along the chute section, eg one at floor level, thereby enabling refuse to be simply swept into the chute.
Preferably, the angle and the distance that the baffle extends into the disposal shaft are chosen such that the baffle provides an awning for the opening below the opening with which the baffle is associated. Even more preferably, the end of the baffle distal to the opening with which it is associated is on a horizontal plane and with upper or a lower edge of the opening below. Such a configuration assists in minimizing refuse put into the disposal shaft re-entering the building through a lower opening. It will be understood that whilst from a manufacturing point of view it is desirable to have all baffles inclined at the same angle, the angle of inclination of the individual baffles within a chute section or between chute sections need not be uniformly the same.
Preferably, the baffle is a plate that extends substantially across a width of the chute section. The plate may be secured to opposite side walls and at or near a lower edge of the opening with which it is associated. The baffle is held securely in such a manner, avoiding bouncing as the refuse travels down the baffle and into the disposal chute, thereby minimising damage to the baffle and providing a smoother path for the refuse falling into the disposal shaft.
Preferably, the plate has a ledge depending from the plate end distal to the opening. The ledge may be provided by a reinforcement bar. Such a ledge strengthens the baffle, minimising bending of the baffle if debris from above hits the free baffle edge on its descent.
In another embodiment, the baffle could be hinged at or near the edge of the opening and be held securely at discrete angles of inclination with respect to the vertical. By providing the option of varying the angle of inclination of the baffle, the user can select the angle of the baffle that best suits specific refuse disposal requirements. Alternatively, the plate may be welded fixed to the side walls.
The angle between the wall in which the opening is provided (or the plane in which the opening is defined) and the plane in which the baffle extends (ie assuming a planar or plate-like baffle) is preferably between 110 to 150 degrees, preferably at about 120 degrees.
The baffle may be removably secured to the chute sections, providing for ease in replacing damaged baffles.
It will be appreciated that whilst the baffle may be embodied by a simple planar plate, other structures may find use, for example a corrugated plate, trough-like plates etc.
An illustrative embodiment of the present invention will be described with reference to the accompanying figures. Further features and advantages of the invention will also become apparent from the description below.
The present invention may be implemented in a variety of ways and the embodiments illustrated are to be considered only illustrative constructions.
In this case, the chute sections 12 are of constant quadrilateral cross-section, made of steel sheets, and removably joined together at their end faces to form an enclosed disposal shaft 14, through which refuse falls by gravity to a container 16 below. Refuse is fed into the disposal shaft 14 through refuse inlets/openings 18.
The concept underlying the invention may best be appreciated by reference to
Associated with each refuse inlet 18 is a baffle 20 extending into the disposal shaft, inclined at an angle to the height axis of chute sections 12 and in particular inclined at an obtuse angle relative to the refuse inlet 18 with which it is associated. Each baffle, which is preferably a planar sheet metal plate, is fixed to its associated refuse inlet 18 at or near the lower edge of that refuse inlet 18. The baffle 20 provides a slide such as to assist in gravity feeding the refuse into the disposal shaft 14, and further minimises the risk of refuse from higher levels harming a user placing refuse into the chute 10 at lower levels. The baffle 20 also provides a shelter or protection to the refuse inlet 18 below the opening with which the baffle 20 is associated. The incline and length of the baffle 20 shown is such that the end of the baffle 20 furthest from the refuse inlet 18 is on a horizontal plane with the upper edge of the refuse inlet 18 below the baffle (see line A). The baffles have a horizontal reinforcing lip 24 dependent from the end of each baffle 20 and extending the entire width thereof.
Each chute section 12 may have multiple baffles 20 (say four to six or more baffles) which may have to be lifted into place by a lifting device due to its weight. However, smaller sections 12 having one or two baffles 20 can be manufactured and lifted by hand and secured in place manually.
Also shown in
The refuse inlets 18 can optionally be provided with a cover 26, as shown in
Further, a securing device 32, here shown as a chain, is provided on the top edge of the refuse chute section 12. This chain 32 may be attached to the scaffolding or other structure against which the refuse chute 10 is supported, or may link to immediately adjacent chute sections 12. The chain 32 can be used in addition, or as an alternative to, attachment points 28.
The most preferred configuration for the chute sections 12 and refuse chute 10 is shown in
The present invention is not limited in application to the refuse chute configuration described. For example, the chute sections may be made out of any suitable material and different cross-sectional shapes may be used to make up the completed refuse chute depending on the needs of the application. Whilst sheet steel would most commonly be used, reinforced plastics materials or wooden constructions are not excluded from consideration, as are mixed-material solutions, eg the chute sections being manufactured from sheet metal, and the baffles from steel (or otherwise reinforced) plastics materials. Similarly, steel sheet baffles may be lined or otherwise coated/covered with abrasion-resistant and/or sound-absorbing materials such as to minimise noise impact upon refuse falling from above and hitting the baffle(s).
Claims
1. A refuse chute for a building assembled from a plurality of tubular chute sections, the chute sections being stackable in an end-to-end or end-wise nesting relationship and securable to provide an enclosed refuse disposal shaft, at least some of the chute sections having one or more openings in a side wall of the chute section,
- characterised in that a baffle each is associated with one or more of the openings, the baffle extending from the side wall into the disposal shaft and being preferably inclined such that there is an obtuse angle between the baffle and the opening with which the baffle is associated.
2. The refuse chute according to claim 1, wherein the angle and the distance that the baffle extends into the disposal shaft are chosen such that the baffle provides an awning for an opening below the opening with which the baffle is associated.
3. The refuse chute according to claim 2, wherein the end of the baffle distal to the opening with which it is associated is on a near horizontal or horizontal plane with the lower edge of an opening below.
4. The refuse chute according to claim 1, wherein the baffle is a plate that extends substantially across a width of the chute section.
5. The refuse chute according to claim 4, wherein the plate is secured to opposite side walls and at or near a lower edge of the opening with which it is associated.
6. The refuse chute according to claim 4 or 5, wherein the plate has a ledge depending from the plate end distal to the opening.
7. The refuse chute according to claim 6, wherein the ledge includes a reinforcement bar.
8. The refuse chute according to any one of claims 5 to 7, wherein the plate is welded to the side walls such that the angle is between 110 to 150 degrees.
9. The refuse chute according to claim 8, wherein the angle is about 120 degrees.
10. The refuse chute according to claim 1, wherein the baffle is hinged at or near the edge of the opening and securable at discrete angles of inclination with respect to the vertical, preferably in a range between 100 and 160 degrees.
11. The refuse chute according to claim 1, wherein the baffle is exchangeably secured to the chute section.
12. The refuse chute according to claim 1, wherein one or more chute sections further include a stacking facilitation portion which extends from the inner side of the lower edge of the chute section and nests into the immediately below adjacent chute section.
13. The refuse chute of any one of claims 1 to 12 wherein the baffles exhibit shock and/or sound absorbing properties
14. A tubular refuse chute section, adapted to be stacked with like chute sections in an end-to-end or end-wise nesting relationship to form a refuse chute for a building, said refuse chute having a disposal shaft, said refuse chute section having one or more openings in a side wall of said chute section, and a baffle associated with one or more of the openings, said baffle extending from the side wall into the disposal shaft and being preferably inclined such that there is an obtuse angle between the baffle and the opening with which the baffle is associated.
15. The refuse chute section according to claim 14, wherein the angle and the distance that the baffle extends into the disposal shaft are chosen such that the baffle provides an awning for an opening below the opening with which the baffle is associated.
16. The refuse chute section according to claim 15, wherein the end of the baffle distal to the opening with which it is associated is on a near horizontal or horizontal plane with the lower edge of an opening below.
17. The refuse chute section according to claim 14, wherein the baffle is a plate that extends substantially across a width of the chute section.
18. The refuse chute section according to claim 17, wherein the plate is secured to opposite side walls and at or near a lower edge of the opening with which it is associated.
19. The refuse chute section according to claim 17 or 18, wherein the plate has a ledge depending from the plate end distal to the opening.
20. The refuse chute section according to claim 19, wherein the ledge includes a reinforcement bar.
21. The refuse chute section according to any one of claims 18 to 20, wherein the plate is welded to the side walls such that the angle is between 110 to 150 degrees.
22. The refuse chute section according to claim 21, wherein the angle is about 120 degrees.
23. The refuse chute section according to claim 14, wherein the baffle is hinged at or near the edge of the opening and securable at discrete angles of inclination with respect to the vertical, preferably in a range between 100 and 160 degrees.
24. The refuse chute section according to claim 14, wherein the baffle is exchangeably secured to the chute section.
25. The refuse chute section according to claim 14, wherein the chute sections further include a stacking facilitation portion which extends from the inner side of the lower edge of the chute section for nesting into an immediately below adjacent chute section.
26. The refuse chute of any one of claims 14 to 25 wherein the baffles exhibit shock and/or sound absorbing properties
Type: Application
Filed: Jan 15, 2007
Publication Date: May 28, 2009
Inventor: John Clement Preston (New South Wales)
Application Number: 12/087,746