U.S. patent number 3,808,967 [Application Number 05/278,424] was granted by the patent office on 1974-05-07 for trash compactor.
This patent grant is currently assigned to SAID Griswold, by said Fair. Invention is credited to John Fair, James L. Griswold.
United States Patent |
3,808,967 |
Fair , et al. |
May 7, 1974 |
TRASH COMPACTOR
Abstract
A two-station trash compactor including a frame supported
carriage movable in a longitudinal path of travel between a pair of
longitudinally spaced, trash compacting stations, homing apparatus
for guiding the carriage to the trash compacting station, a
compacting ram vertically movable on the carriage between a raised
position and a lowered trash compacting position for selectively
compacting trash in either of a pair of longitudinally spaced,
partible trash containers at the trash compacting stations, and ram
driving apparatus on the carriage for moving the compacting ram in
a to-and-fro vertical path of travel to compact the trash a
predetermined amount and then automatically returning the
compacting ram to a removed position.
Inventors: |
Fair; John (Portage, MI),
Griswold; James L. (Union City, MI) |
Assignee: |
SAID Griswold, by said Fair
(N/A)
|
Family
ID: |
23064917 |
Appl.
No.: |
05/278,424 |
Filed: |
August 7, 1972 |
Current U.S.
Class: |
100/221; 100/52;
100/226; 100/255; 220/4.21; 100/218; 100/229A; 100/295 |
Current CPC
Class: |
B30B
9/3007 (20130101); B30B 9/3021 (20130101); B30B
9/3092 (20130101) |
Current International
Class: |
B30B
9/30 (20060101); B30B 9/00 (20060101); B30b
015/16 () |
Field of
Search: |
;100/53,215,221,229A,224,218,295,226,255,52,26,269R ;220/4B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Wilhite; Billy J.
Attorney, Agent or Firm: Learman & McCulloch
Claims
1. A two-station trash compactor comprising:
a frame;
a transfer carriage longitudinally movable on said frame between
first and second longitudinally spaced trash compacting
stations;
ram means movable on said carriage in a to-and-fro path of travel
for selectively compacting trash at said first and second stations;
and
locator means including means resisting movement of said carriage
from each station until said carriage is moved a predetermined
distance from said station and then permitting said carriage to
freely move toward the other
2. The apparatus of claim 1 wherein said locator means includes
roller means on one of said frame and said carriage and cooperating
socket means on the other of said frame and carriage for receiving
said roller means, said socket means being positioned such that
said roller means moves
3. The trash compactor of claim 1 wherein said ram means comprises
a convergent axial end compressing face for camming relatively
radially disposed trash toward the axis of said compacting ram
means as said ram
4. The apparatus set forth in claim 1 including:
trash container means for receiving trash to be compressed; and
a dolly supporting said trash container means and being movable
between a position remote from said frame and a frame engaging
position in response
5. The apparatus of claim 4 wherein said trash container means
includes a platform, first and second partible container side wall
portions relatively movable between abutting trash receiving
positions and spread apart trash emptying positions, said first
side wall portion being mounted on said platform for swinging
movement about a horizontal axis to relatively move said side wall
portions between said abutting and spread
6. The compactor as set forth in claim 1 wherein said frame
includes longitudinal track means having longitudinally spaced
apart, socket means at said first and second stations, said
carriage including laterally spaced rollers on said track means
receivable in said socket means when said carriage is moved to said
first and second stations;
said locator means including means yieldably urging said carriage
toward said track to resist movement of said rollers out of said
socket means.
7. The apparatus set forth in claim 6 including means reactable
between said carriage and said frame for longitudinally moving said
carriage out of said homing position at said first and second
stations against the
8. The apparatus set forth in claim 6 wherein said track means
comprises at least one pair of laterally spaced longitudinal
tracks, said socket means comprising at least one socket in one of
said tracks adjacent said first station and at least another socket
in the other track adjacent said other station; said roller means
including at least one pair of rollers on said compacting ram means
and positioned such that one roller is in longitudinal alignment
with said one track and receivable in the socket at said first
station when the carriage is at said first station and a second
roller in longitudinal alignment with said second track and
receivable in the socket at said second station when said carriage
is at said second station.
Description
FIELD OF THE INVENTION
This invention relates to trash compactors and more particularly to
two-station trash compacting apparatus having a manually movable
carriage carrying a trash compacting ram which compacts trash in
partible containers.
BACKGROUND OF THE INVENTION
The disposal of trash from commercial establishments such as
restaurants, hotels, and hospitals, is expensive because of the
large volume of trash which must normally be removed from these
facilities. If bulky trash is permitted to accumulate, it utilizes
valuable floor space. Accordingly, it is an object of the present
invention to provide new and improved apparatus for compacting
trash into a small volume.
It is important that a trash compacting machine be economical to
operate, and require minimum maintenance. Accordingly, it is
another object of the present invention to provide trash compacting
apparatus which is more economical to manufacture, operate, and
maintain than known trash compactors of the same general
capacity.
If trash is compacted at only one station, the operation must be
interrupted until the trash container, which has been filled with
compacted trash, is emptied. An advantage of a two-station
compactor is that twice as much trash can be packed before any
trash containers need be emptied and as trash is being packed into
a container at one station, the other container can be
simultaneously filled. A two-station compactor which merely doubles
the equipment of a single station compactor would appreciably
increase the cost of the compactor. Accordingly, it is still
another object of the present invention to provide a two-station
trash compactor including a carriage mounted compacting ram which
is manually movable between two trash compacting stations, and
homing apparatus for guiding the carriage along a portion of its
path to the stations and for releasably retaining resisting
movement of the carriage from the stations.
In some cases it may be desirable to pack trash in a flexible,
heavy duty compactor bag and in other cases it may be desirable to
compact the trash in rigid garbage cans. Accordingly, yet another
object of the present invention is to provide a trash compactor
which can selectively pack trash in either a flexible bag or a
rigid container.
As sometimes occurs, liquid is included in the trash and will
splash outwardly of the trash container during compaction.
Accordingly, a further object of the present invention is to
provide trash compacting ram apparatus including a resilient splash
ring to inhibit such liquid from splashing out of the trash
containers.
If in operation the trash compacting ram engages non-compressible
material near its outer extremity, the ram will tend to undesirably
cant. Accordingly, a still further object of the present invention
is to provide a rotatable funnel-shaped trash compacting ram which
will cam non-compressible objects toward the center of the ram and
prevent them from causing the ram to cant.
In a two-station compactor, workers can be filling one container
while the trash in the other is being compacted. Since the
containers are closely spaced, it is important that the workers not
be injured by the moving ram. Accordingly, it is an object of the
present invention to provide a two-station trash compactor
incorporating adequate shrouds, shields, and housings to prevent an
operator from inadvertently placing a part of his body under the
compacting ram.
When trash is compacted in a container, the compacted trash is
relatively heavy and packed in place, and thus not easily removed
from the container. Accordingly it is yet another object of the
present invention to provide a partible trash container which is
designed to facilitate removal of the compacted material. Other
objects and advantages of the present invention will become
apparent as the description thereof proceeds.
THE SUMMARY OF THE INVENTION
Apparatus for compacting trash in trash containers comprising a
frame, a transfer carriage longitudinally movable on the frame
between first and second longitudinally spaced trash compacting
stations, ram means on the carriage reciprocably movable in a
to-and-fro path between inoperative and operative positions to
compress the trash in the containers, and homing means for guiding
the carriage to the first and second trash compacting stations.
The present invention may more readily be described by reference to
the accompanying drawings in which:
FIG. 1 is a fragmentary, rear perspective view of trash compacting
apparatus constructed according to the present invention;
FIG. 2 is a front perspective view particularly illustrating the
trash container carriage assembly;
FIG. 3 is a vertical sectional view taken along the line 3--3 of
FIG. 1, the side wall of the container being broken away to more
clearly illustrate the compacting ram;
FIG. 4 is a sectional top plan view taken along the line 4--4 of
FIG. 3;
FIG. 5 is a fragmentary sectional front view taken along the line
5--5 of FIG. 4 and particularly illustrating the apparatus for
forcing the carriage out of the home positions;
FIG. 6 is a fragmentary sectional rear view taken along the line
6--6 of FIG. 3 and particularly illustrating the relation between
the lower portion of the frame and the container dolly
assembly;
FIG. 7 is an under plan view of the homing carriage and tracks,
taken along the line 7--7 of FIG. 3; and
FIG. 8 is a schematic diagram of an electrical control circuit for
operating the apparatus illustrated in FIGS. 1-7.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Apparatus constructed according to the present invention is mounted
on a framework or housing, generally designated F, including a pair
of longitudinally spaced apart base frame members 10 which support
a pair of vertical end wall members 14 and are spanned by a rear,
lower cross frame member. A partial, upper, front wall section 16,
a pair of longitudinal channel members 18, (FIG. 3), and a lower
pair of longitudinal rails 19 span the end walls 14.
Supported on the channels 18, for movement between a pair of trash
compacting stations, generally designated 20 and 22, is a carriage,
generally designated 24, which includes a platform 25 mounting a
plurality of axles or pivot pins 25a journaling a plurality of
casters 26 having annular V-grooves 27 received on laterally spaced
V-shaped tracks 28 which are fixed to the top sides of the channel
members 18. The carriage 24 moves on the rollers 26, between the
solid line position, illustrated in FIG. 1, and the chain line
position, illustrated in FIG. 1, at the stations 22 and 20,
respectively.
An aperture 28a is provided in the carriage platform 25 and is
spanned by a plate 30 having holes 32 therein receiving mounting
pins 34 which are connected to the base of a double-acting, fluid
operated cylinder 36. A pair of compression springs 38 surround the
mounting pins 34 and react between the plate 30 and the heads of
the pins 34 for biasing the cylinder 36 upwardly to the raised
position, illustrated in solid lines in FIG. 3, but permitting
movement of the cylinder 36 to a lowered position, in a manner and
for a purpose which will be more particularly described
hereinafter.
The cylinder 36 includes a piston rod 44 rotatable about its axis
and having an end 46 threadedly connected to an internally threaded
steel insert 47 centrally provided in a trash compacting ram,
generally designated 48, which may be constructed of a lightweight
aluminum alloy, for example. The compacting ram 48, which is
circular in plan, has an annular groove 52 in the side wall thereof
receiving an annular, resilient splash rail or ring 54. The outside
diameter of the splash rail 54 is slightly larger than the outside
diameter of the ram 48 but is slightly less than the inside
diameter of either of a pair of trash containers, generally
designated C, in which trash T is compacted.
The ram 48 is provided with an upwardly convergent trash compacting
lower face 48a which tends to direct radially outwardly disposed
non-compressible objects radially inwardly toward the axis of the
cylinder rod 44 when the trash is being compacted. The face 48a is
sharply inclined to a plane perpendicular to the axis of piston rod
44.
Fixed to the ram actuating cylinder 36 and underlying the support
rails 19 is a homing or locator platform 56 having longitudinally
spaced apart pairs of wheels 58 and 60 journaled on suitable shafts
58a at 60a, respectively, fixed to opposite ends of the platform
56. Fixed to the underside of each of the longitudinal frame rails
19 is a track member 62 including longitudinally extending,
vertically recessed, downwardly opening, run portions 64a and 64b
along the laterally opposite sides thereof separated by a
longitudinal guide rib 66. The rollers 58 and 60 are biased
upwardly against the underside of the track 62 by the biasing
springs 38 which react between the pins 34 at the upper side of the
cylinder 36 and the carriage supported crosspiece 30. The laterally
outer run portions 64a each includes a pair of downwardly opening,
homing recesses 70 so that the rollers 60 are received in the
recesses 70 when the carriage 24 is at either of the stations 20
and 22. The laterally inner run portions 64b each includes a pair
of downwardly opening homing recesses 70a so that the rollers 58
are received in the recesses 70a when the carriage 24 is at either
of the compacting stations 20 or 22. When the rollers 58 and 60 are
received in the recesses 70a and 70, they are, of course, moved
upwardly from the chain line position illustrated in FIG. 3 to the
solid line position also illustrated in FIG. 3. Because the rollers
58 and 60 ride along separate runs 64a and 64b, respectively, the
rollers 58 will not be received in the recesses 70 and the rollers
60 will not be received in the recesses 70a. Also, since the
rollers 60 and 58 will only enter one of the recesses as the
carriage moves in its longitudinal path, the transition of the
carriage 24 between the stations 20 and 22 is smooth once the
rollers 58 and 60 have been removed from their associated recesses
70a and 70. The recesses 70a and 70 are positioned that the rollers
58 and 60 riding on each track 62 will be simultaneously received
in its associated recess 70a and 70, respectively. When the rollers
58 and 60 are received in their respective recesses, the biasing
springs 38 atop the cylinder 36 yieldably urge the rollers 58 and
60 to remain in their homing recesses 70a and 70, respectively.
After the rollers 60 and 58 engaging the tracks 62 are
longitudinally moved out of their respective homing, or locator,
recesses 70 and 70a, at one of the stations 20 and 22 in a manner
to be particularly described hereinafter, the carriage 24 will be
smoothly and easily transferred to the other of the stations 20 and
22 where the rollers 60 and 58 are received in the other pair of
homing recesses 70 and 70a. Fixed to opposite ends of the homing
platform 56 are mounting and guide brackets 76 (FIG. 5) which mount
a protective shroud or shield 78 that is U-shaped in plan and
travels with the carriage 24 to provide a barrier which prevents
the operator from inadvertently placing his hand under the
compacting ram 48 at the station while placing trash in the
compactor at the other station.
A front half-door 88 covers the lower half of the machine and
includes horizontal hinge or guide pins 87 received in a pair of
vertical tracks provided along the forward edge of the end walls
14. The half-door 88 may be moved upwardly from the position
illustrated in FIG. 1 to a raised position covering a start switch
89 mounted on the upper front wall section 16 so that the
containers C can be removed, emptied and replaced, without any
danger of inadvertently activating switch 89.
Lever apparatus for longitudinally forcing the carriage 24 out of
either of its "home" positions at the stations 20 and 22 is
provided, and includes a handle 100 fixed to a yoke 90 which is
pivotally mounted on the underside of the homing bracket 56 by a
fulcrum or pivot pin 91. Opposite ends of the yoke 90 are pivotally
connected by a pair of pivot pins 92, to a pair of links 94 which
are also pivotally connected by pivot pins 95, to horizontal
reaction bars 96 slidably mounted in sleeves 97 fixed to opposite
legs of the U-shaped ram covering shroud 78.
A pair of wear plates 98, which are engageable by the bars 96 as
the yoke 90 is swung about the fulcrum 91, is fixed to the side
walls 14. The handle 100 and the yoke 90 constitute a lever
swingable about the fulcrum 91 so as to axially move the bars 96
into engagement with their associated plates 98 and force the
rollers 60 and 58 out of their respective recesses 70 and 70a so
that the carriage 24 can move away from one of the stations 20 and
22 towards the other station. The bars 96 react with the plates 98
and apply a longitudinal force which causes the rollers 58 and 60
to be cammed out of the homing recesses 70 and 70a against the
vertical biasing force of springs 38. When the rollers 58 and 60
are moved a predetermined distance so as to be removed from the
recesses 70 and 70a, the carriage 24 can be longitudinally moved
between the stations 20 and 22, with relatively little manual force
on the handle 100 since the rollers 58 and 60 roll on the smooth
track portions 64a and 64b and the carriage rollers 26 freely roll
along the V-tracks 28.
A horizontal track 102 is provided along the mid-portion of each
end wall 14 for receiving the flange 103 of a trash apron 104
having funnel members 105 which direct trash into the containers C.
The shroud 104 is removable from the track 102 to enhance the
cleaning thereof.
Also fixed to the homing platform 56 is a bracket 108 mounting a
continuously operated electric motor 110 driving a fluid pump 112
also supported on the bracket 108 and connected with a pair of
fluid conduits 113 which supply fluid through a solenoid actuated,
spring returned, 4-way, 2-position valve 37 to opposite ends of the
ram actuating cylinder 36. The cylinder 36 may suitably develop
10,000 pounds of force to be used with a 15-inch diameter ram 48 to
create a trash compacting pressure of approximately 50 pounds per
square inch. A pressure sensing switch 114 is connected in the line
113 to sense the pressure of the fluid therein and may suitably
comprise a "Static-O-Ring" type pressure switch manufactured by
Mechiniarts Associates, 401 Wyandott, Kansas City, Missouri. The
purpose of the switch 114 will become apparent when the operation
is described.
THE CONTAINER ASSEMBLY
The container assembly apparatus, generally designated A, includes
a carriage platform 116 supported by a plurality of casters 118
having vertical swivel pins 119 slidably and rotatably received in
apertures 117 provided in the platform 116 for permitting the
platform 116 to move vertically relative to the casters 118 between
the upper and lower positions, illustrated in solid and chain
lines, respectively, in FIG. 6, against the force of biasing
springs 120' which react between the pins 119 and the platform 116
to bias the platform 116 to the raised position illustrated in
solid lines in FIG. 7. When the compacting ram 48 compresses trash
in the containers C, the platform 116 is moved downwardly to engage
and be supported by the side frame members 10.
The containers C, which may each suitably be of a 30-gallon
capacity, each includes a fixed half-container side wall 122 fixed
to the platform 116, and a movable half-container side wall 123
fixed to a horizontal pivot pin 126 (FIG. 3), journaled by a pair
of ears 128 fixed to the platform 116 for swinging movement about
the horizontal axis of the shaft 126 from a position adjacent the
fixed half-container side wall 122 to the removed position,
illustrated in FIG. 2. Fixed to the movable container side wall 123
is the bottom wall 130 of the container C which lifts the compacted
trash T from a position adjacent the platform 116 to a raised
position away from the fixed half-container side wall 122 when it
is swung vertically so that it may be more easily removed by a
pick-up man.
The container half walls 122 and 123 include confronting flanges
132 which are locked together by a U-shaped arm member, generally
designated 134, pivotally mounted on a bracket 136 fixed to the
half-container side wall 123 for movement between a locking
position illustrated in FIG. 1 and an unlocked position illustrated
in FIG. 2. In the locked position, the U-shaped arm 134 is received
over the abutting flanges 132 and a pin 140 is passed through
aligned apertures provided in the abutting flanges 132 and the
U-shaped portion 138 to lock the arm 134 in position. A handle 140a
is fixed to the U-shaped arm 134 to facilitate movement thereof. If
desired, a liner bag L (FIG. 2) may be inserted into the containers
C to receive the garbage collected. The bag can later be tied and
removed.
THE CIRCUIT
Referring now more particularly to FIG. 8, a pair of lines L1 and
L2 are connected across a suitable source of power such as 110
volt, 60 cycle alternating current. Connected in series in line L1
are the contacts 89a of the start switch 89, which is mounted on
the front wall 16 of the machine, the normally closed door contacts
120a of a switch which is mounted on one of the sidewalls 14 and
which is actuated by the door 88 being moved to the raised position
to open the contacts 120a, and a parallel circuit including sets of
contacts 122a and 121a which are respectively closed when the
switches 122 and 121, mounted on opposite ends of the frame, are
engaged by the carriage 24 being moved to the stations 22 and 20,
respectively.
Connected in parallel across the lines L1 and L2 in line L3 is the
fluid pump drive motor M1. A control relay R1 is connected in line
L4 across the lines L1 and L2 and includes holding contacts R1a
connected in series with the normally closed contacts 124a which
open when the switch 124 (FIG. 1) is actuated as the ram 48 is
returned to the raised inoperative position. Connected across the
lines L1 and L2 in line L5 are the normally closed contacts 114a of
the fluid pressure switch 114 located in fluid conduit 113 and the
advance solenoid 37a of a spring returned, solenoid actuated valve
37 which, when energized, will direct fluid to the ram advance
cylinder 36 so as to move the compacting ram 48 downwardly to
compress the trash. Connected across the lines L1 and L2 in line L6
are the normally open contacts 114b of the fluid pressure switch
114 and the retract solenoid 37b, which when energized, will
actuate the ram control valve 37 so as to direct fluid to the ram
cylinder 36 in such a manner as to return the ram 48 upwardly to
the raised position illustrated in FIG. 1. Anti-bacterial lights
45a are provided at the compacting stations 20 and 22 for
eliminating any bacteria in or about the containers C. The lights
45a are serially connected in line L7 across the lines L1 and L2
and may suitably comprise ozone producing lights such as that
manufactured by the General Electric Company, Cleveland, Ohio as
Model FG1119-E2.
THE OPERATION
In order for the machine to operate, the door 88 must be moved to
the lower position to actuate the switch mounted on the sidewall 14
and close contacts 120a (line L1), and the carriage 24 must be at
either of the trash compacting stations 20 or 22 so that one of the
homing switches 121 or 122 is actuated to close one of the sets of
contacts 121a and 122a. After a suitable amount of trash has been
dropped in one of the trash containers C, the container at station
22, for example, the start switch 89 is acutated to close the
contacts 89a (line L1) to energize relay R1 (line L4) to close the
holding contacts R1a connected in parallel with the start switch
contacts 89a. The fluid pump driving motor M1 is connected across
the lines L1 and L2 in line L3 and is continuously energized. When
the switch contacts 89a are closed, the advance solenoid 37a is
energized and operates the ram control valve 37 so that fluid is
directed to the ram control cylinder 36 in such a manner as to
advance the compacting ram 48 axially into the container C at
station 22. As the ram engages the trash, the compacting force is
transmitted to the platform 116 which is driven downwardly against
the force of the caster supported springs 120' so that the platform
116 engages and is braced by the frame braces 10, and the trash T
and the container C will be tightly clamped between the frame
braces 10 and the compacting ram 48. If the springs 120' were not
provided, the caster wheels would be crushed and the entire frame
would merely raise off the floor as the compacting ram pressed
against the trash. As the trash is being compacted, the splash ring
54 inhibits liquid, and other fluid garbage included with the
trash, from being expelled out of the container C.
If the ram 48, while being lowered, encounters a radially outwardly
disposed non-compressible object, the non-compressible object will
be cammed radially inwardly toward the axis of the piston rod 44 by
the tapering surface face 48a of the compacting ram.
When the trash T has been compacted to a predetermined amount, the
pressure in fluid line 113 communicating fluid to the advance side
of ram control cylinder 36 will build until the pressure switch 114
is actuated to open the normally closed contacts 114a (line L5) to
deenergize the advance solenoid 37a and close the contacts 114b
(line L6) to energize the retract solenoid 37b to raise the ram
43.
After the container at station 22 is filled, the carriage shifting
handle 100 is grasped and turned counterclockwisely, as illustrated
in FIG. 5, to slide the bar 96 adjacent station 22, into engagement
with the adjacent wear plate 98. The bar 96 reacts with the plate
98 to cam the rollers 58 and 60 riding on one of the tracks 62
longitudinally and vertically out of their respective homing
recesses 70a and 70.
After the rollers 58 and 60 are out of their respective recesses
70a and 70 at the station 22, the carriage 25 may then roll freely
toward the chain line position at station 20 where the pair of
rollers 58 and 60 will be received by their respective homing
recesses 70 and 70a at station 20 to halt the carriage 24 in the
second home position 20. The start switch is again energized to
repeat the cycle.
When a trash container C is full, the door 88 is raised to a
position covering the start switch 89 and the trash container
assembly A is removed from underneath the apron 104. The loaded
trash container C is emptied by removing the pin 140 and swinging
the handle 134 about the axis of the handle member 136 to free the
confronting flanges 132. The movable container half portion 123 is
then swung about the horizontal axis 126 to lift the trash T to the
position illustrated in FIG. 2 and the trash T is then removed. The
container-half 123 and handle member 136 are returned to the
positions shown in FIG. 1 and the container assembly is returned to
a position underneath the apron 104. The door 88 is returned to its
original position covering the lower half of the door. The
container at station 20 can now be filled and the operation
repeated.
It is to be understood that the drawings and descriptive matter are
in all cases to be interpreted as merely illustrative of the
principles of the invention rather than as limiting the same in any
way since it is contemplated that various changes may be made in
various elements to achieve like results without departing from the
spirit of the invention or the scope of the appended claims.
* * * * *