U.S. patent number 3,770,105 [Application Number 05/251,744] was granted by the patent office on 1973-11-06 for product displaying, selective, dispensing apparatus.
This patent grant is currently assigned to The Vendo Company. Invention is credited to Wilbert O. O'Neal.
United States Patent |
3,770,105 |
O'Neal |
November 6, 1973 |
PRODUCT DISPLAYING, SELECTIVE, DISPENSING APPARATUS
Abstract
A general merchandising machine has product carriers which are
moved in a rectangular path of travel in succession past a display
window and a dispensing station for customer access to a product
selected from one of the carriers and brought into registration
with the station. The carriers are positively controlled against
tipping along the straight stretches of their path of travel as
well as during change of direction at the corners thereof, and
special mountings for each carrier plus openable track sections for
the carriers facilitate removal and replacement of the carriers for
cleaning or maintenance.
Inventors: |
O'Neal; Wilbert O.
(Independence, MO) |
Assignee: |
The Vendo Company (Kansas City,
MO)
|
Family
ID: |
22953224 |
Appl.
No.: |
05/251,744 |
Filed: |
May 9, 1972 |
Current U.S.
Class: |
312/97;
198/800 |
Current CPC
Class: |
B65G
17/323 (20130101); B65G 1/127 (20130101); B65G
2201/02 (20130101) |
Current International
Class: |
B65G
1/12 (20060101); B65G 17/32 (20060101); B65G
1/127 (20060101); B65g 015/00 () |
Field of
Search: |
;198/137,131,138,158,146
;221/77 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Aegerter; Richard E.
Claims
Having thus described the invention, what is claimed as new and
desired to be secured by Letters Patent is:
1. In a dispensing machine:
an endless, upright conveyor having generally vertical straight
stretches and arcuate stretches adjacent the top and bottom of the
conveyor;
a dispensing station disposed adjacent a vertical stretch;
a plurality of product carriers;
means mounting said carriers on said conveyor for movement in
succession past said station,
said mounting means shiftably mounting each of said carriers for
pivotal movement relative to the conveyor and for reciprocal
movement toward and away from said conveyor;
follower means on each of said carriers;
guide means adjacent each of said arcuate stretches respectively
and disposed for engagement with the follower means of a carrier
moving therepast;
limit means adjacent and in spaced, opposed relationship to each of
said guide means for oppositely engaging and confining the follower
means of a carrier moving past the corresponding guide means to a
square-cornered, rectilinear path of travel in spite of the arcuate
movement of the conveyor around said arcuate stretches; and
a track for the carriers disposed to engage the bodies of the
carriers during movement thereof to maintain the carriers against
substantial tipping,
each of said carriers being removably mounted,
said track having a shiftable track section and means mounting said
section on the remainder of the track for movement between a closed
position in which the section blocks removal of carriers from the
machine and an open position in which such removal is permitted
said track having releasable latching means for holding said
section in said closed position,
said latching means including a first component secured to said
section for movement therewith and set in a distance from the end
of said section, and a second component on the remainder of said
track projecting beyond the end thereof in opposition to said first
component, said second component being adapted to receive said end
of the section behind the projecting portion of the second
component when said components are vertically aligned with one
another.
2. In a dispensing machine as claimed in claim 1, wherein said
guide means is provided with rectilinear outer surfaces and said
limit means is provided with rectilinear inner surfaces disposed in
spaced opposition to said outer surfaces, thereby defining a
passage for the follower means.
3. In a dispensing machine as claimed in claim 1, wherein said
mounting means for each carrier includes a support arm secured to
the conveyor, and structure on the carrier movable along and
completely off of said arm.
4. In a dispensing machine as claimed in claim 3, wherein each of
said arms is provided with an open-ended guide slot for receiving
said structure of the corresponding carrier.
5. In a dispensing machine as claimed in claim 3, wherein said
structure includes a spindle and a first roller rotatably carried
by said spindle, said follower means including a second roller
rotatably carried by said spindle adjacent said first roller.
6. In a dispensing machine as claimed in claim 5, wherein each of
said arms is provided with an open-ended slot for receiving said
first roller of the corresponding carrier.
7. In a dispensing machine as claimed in claim 1, wherein said
section mounting means includes an axially shiftable hinge pin
between said components for swinging of said section between the
alternate positions thereof when the section is displaced axially
from behind said second component.
8. In a dispensing machine:
an endless conveyor;
a dispensing station disposed adjacent the conveyor;
a plurality of product carriers;
means mounting said carriers on the conveyor for movement in a
closed path of travel and in successive order past said
station,
said mounting means removably and pivotally mounting each of said
carriers on the conveyor; and
an openable track along one stretch of said path of travel for
maintaining the carriers against pivoting as the latter move along
said stretch,
said track having a shiftable track section and means mounting said
section for movement between a closed position in which the section
blocks removal of carriers from the conveyor and an open position
in which the section permits such removal,
said track being provided with releasable latching means for
holding said section in said closed position,
said latching means including a first movable component fixed to
said section for movement therewith and set in a distance from the
proximal end of the section, and a second stationary component
fixed against movement with the section and having a projecting
portion disposed in opposition to said first component, said second
component being adapted to receive said end of the section behind
said projecting portion of the second component when said
components are aligned with one another, whereby to hold said
section in said closed position.
9. In a dispensing machine as claimed in claim 8, wherein said
section mounting means includes an axially shiftable hinge pin
between said components for swinging of said section between the
alternate positions thereof when the section is displaced axially
from behind said second component.
10. In a dispensing machine as claimed in claim 8, wherein said
mounting means for each carrier includes a pair of support arms
secured to the conveyor at opposite ends of the carrier and a
roller on each end of the carrier freely movable along and
selectively off of the corresponding arm.
11. In a dispensing machine as claimed in claim 10, wherein each of
said arms is provided with an open-ended guide slot for the
corresponding roller.
12. In a dispensing machine:
a pair of endless, upright and horizontally spaced apart conveyors
having generally vertical straight stretches and arcuate stretches
adjacent the tops and bottoms of the conveyors;
a dispensing station located adjacent one pair of vertical
stretches of the conveyors;
a plurality of product carriers;
a series of carrier support arms projecting from each of said
conveyors,
each of said arms having a slot therein extending outwardly from
the conveyor and terminating in an open end;
mounting structure projecting from opposite ends of each carrier
for reception within the slots of a proximal pair of arms to adapt
the carriers for movement in succession past said station,
said structures being shiftable within and along their slots for
pivoting of the carriers relative to the conveyors, for
reciprocation of the carriers relative to the conveyors, and for
complete removal of the carriers from the conveyors when the
structures are moved out of their slots through said open ends
thereof;
a pair of followers rotatably mounted on opposite ends of each
carrier;
a guide passage adjacent each of said arcuate stretches for
receiving the proximal follower of a carrier moving around one end
of its path of travel,
said passage having a continuous square corner around the adjacent
arcuate stretch defined by a pair of continuous, opposed, inner and
outer surfaces disposed to receive the follower therebetween
whereby to limit the carriers to square-cornered, rectilinear
movement around the ends of their path of travel in spite of the
arcuate movement of said conveyors around said arcuate stretches;
and
at least one continuous track complementally engageable with the
bodies of the carriers during advancement thereof by the conveyors
for preventing tipping of the carriers as they are advanced and for
preventing said structures of the carriers from leaving their slots
in said arms through said open ends thereof,
said track having a gate section and means mounting said section on
the remainder of the track for movement between a closed position
wherein the section blocks removal of a carrier aligned therewith
from the machine and an open position wherein the section permits
such removal of the aligned carrier.
13. In a dispensing machine as claimed in claim 12, wherein is
provided releasable latching means on said track for holding said
section in said closed position.
14. In a dispensing machine as claimed in claim 13, wherein said
latching means includes a first component secured to said section
for movement therewith and set in a distance from the end of said
section, and a second component on the remainder of said track
projecting beyond the end thereof in opposition to said first
component, said second component being adapted to receive said end
of the section behind the projecting portion of the second
component when said components are vertically aligned with one
another.
15. In a dispensing machine as claimed in claim 14, wherein said
section mounting means includes an axially shiftable hinge pin
between said components for swinging of said section between the
alternate positions thereof when the section is displaced axially
from behind said second component.
16. In a dispensing machine as claimed in claim 12, wherein each of
said structures includes a spindle and a first roller rotatably
carried by said spindle for engagement within the slot of a
proximal arm, each of said followers including a second roller
rotatable on said spindle independently of said first roller and
adjacent the latter for engagement within the passage.
Description
This invention relates to vending machines of the class commonly
referred to as general merchandisers. A typical example of an
earlier machine of such class is shown and described in U. S.
letters Pat. No. 3,556,284, issued Jan. 19, 1971, and entitled
DISPENSING MACHINE HAVING MULTIPLE VERTICALLY MOVABLE, HORIZONTAL
PRODUCT CARRIERS. Machines of this type allow a prospective
customer to "shop" for a desired product by actuating the product
conveyor of the machine to bring products in succession past a
display window. The customer may then stop the conveyor when his
product choice moves into registration with a dispensing station,
whereupon deposit of the required credit enables the customer to
remove his choice from the machine.
Mainfestly, it is extremely desirable for reasons of efficiency
that the machine carry the maximum inventory possible within its
space limitations. To this end, the product carriers secured to the
conveyor of the machine should follow a rectangular path of travel
with essentially square corners which conforms as closely as
possible to the dimensions of the product cabinet. In this manner
the carriers may be disposed in close proximity to one another on
the conveyor without interfering with each other during changes of
direction at the limits of the conveyor. A number of control
problems exist, however, since the carriers must be allowed to
pivot relative to the conveyor. Since the machine may be required
to handle items which would be disturbed when upset, the item
supporting surfaces of the carrier must be maintained in planes
that do not depart substantially from the horizontal as the
carriers move through the upper and lower limits of their
travel.
Accordingly, an important object of the present invention is to
provide an improved dispensing or vending machine having a conveyor
with product carriers supported thereon wherein the carriers are
advanced in a substantially rectangular path of travel having
essentially square corners for maximum product capacity and are
positively controlled during change of direction around such
corners to preclude any substantial tipping.
Another important object of the present invention is to provide a
machine of the aforesaid variety wherein control of the carriers
against tipping is accomplished along straight stretches of the
path of travel of the carriers as well as around the corners
thereof through the provision of inner and outer confining tracks
for the carriers.
An additional important object of the instant invention is the
provision of tracks for the carriers as aforesaid which maintain
the carriers in their proper disposition, yet a section of which
tracks may be selectively moved out of their confining relationship
with the carriers to facilitate cleaning or complete removal of any
and all carriers from the machine.
Yet another important object of the present invention is to provide
a noncomplex, yet highly reliable means for mounting each carrier
on the conveyor which facilitates control of each carrier as the
latter changes direction at the corners of its path of travel yet
does not in any way detract from the ready removability of the
carriers from the conveyor.
Additionally, an important object is to provide a double roller
assembly at opposite ends of each product carrier, one of the
rollers of each assembly serving to pivotally and shiftably mount
the corresponding carrier on the conveyor for movement relative to
the latter as the carrier changes directions, and the other roller
serving as a cam follower for receiving directional forces applied
to the carrier during such directional changes thereof.
Still other objects and advantages of the invention will become
clear or made apparent by the description and drawings which
follow.
In the drawings:
FIG. 1 is a fragmentary, front elevational view of the product
storage compartment of a general merchandising machine constructed
in accordance with the principles of the present invention, one
track section for the product carriers of the compartment being
shown in its open position;
FIG. 2 is a fragmentary side elevational view of the compartment
with a wall thereof partially broken away to reveal the product
carriers therebehind, the interior door of the machine cabinet
being shown fragmentarily and in cross section;
FIG. 3 is an enlarged, fragmentary, substantially vertical
cross-sectional view through the compartment;
FIG. 4 is a fragmentary, vertical, cross-sectional view taken along
line 4--4 of FIG. 3;
FIG. 5 is a fragmentary, horizontal, cross-sectional view taken
along line 5--5 of FIG. 3;
FIG. 6 is an enlarged, fragmentary, substantially horizontal
cross-sectional view of one lower end of the compartment looking
downwardly toward the floor of the compartment;
FIG. 7 is an enlarged, fragmentary detail view of a double roller
assembly used at each end of the carriers;
FIG. 8 is a fragmentary, cross-sectional view of an outer track for
the carriers taken along line 8--8 of FIG. 3;
FIG. 9 is an enlarged, fragmentary, cross-sectional view of an
outer track for the carriers taken along line 9--9 of FIG. 1 and
illustrating the shiftable section of the track in its closed
position;
FIG. 10 is a view similar to FIG. 9 showing the shiftable track
section in its opened position;
FIG. 11 is a perspective view of a casting found at each limit of
the conveyor for the carriers and containing cam surfaces for
controlling the carriers as they change directions;
FIGS. 12-14 are fragmentary, partially diagrammatic views
illustrating the sequence of movement of one of the carriers as it
changes directions at its lower limit of travel;
FIG. 15 is a perspective view on a reduced scale of a general
merchandising machine employing the apparatus of the present
invention.
The merchandiser of FIG. 15 has a cabinet 10 closed by a swingable
outer door 12, the latter being provided with a large rectangular
opening 14, a coin deposit slot 16, and a depressable "shopping"
button 18 which controls operation of a product conveyor within
cabinet 10, hereinafter described in detail. Cabinet 10 has an
interior product storage structure or compartment 20 (shown in an
isolated condition in FIGS. 1 and 2 for clarity of illustration)
which is normally closed by an inner door 22 (FIG. 2) of cabinet
10. A large display window 24 in door 22 is aligned with opening 14
in outer door 12 for viewing of products presented behind window 24
by shiftable product carrier bins 26. A horizontally extending
dispensing station 28 is defined by an opening below window 24,
which opening is normally closed by a horizontal series of
individually shiftable product doors 30. Each bin 26 is rectangular
in configuration and is divided into a horizontally extending
series of separate stalls corresponding in number to the doors 30
and in respective alignment therewith, such that opening of a
selected door 30 provides access to a corresponding product stall
in a bin 26 brought into registration with station 28.
The carrier bins 26 are advanced in a closed path of travel by a
vertically disposed conveyor 32 on each side of compartment 20.
Only one of the conveyors 32 is shown in the drawings and will
hereinafter be described inasmuch as the components of both
conveyors are identical. A motor 34 (FIG. 2) supplies driving power
to conveyor 32 via a chain and sprocket assembly 36 which, in turn,
drives a transverse shaft 38 spanning the lower region of
compartment 20. An endless, flexible drive chain 40 is entrained
about a pair of identical upper and lower sprockets 42 for each
side of compartment 20, each lower sprocket 42 being affixed to
drive shaft 38 and each upper sprocket 42 being affixed to a
drivable shaft 44 crossing the upper region of compartment 20. By
virtue of the circular nature of sprockets 42, it is seen that
chain 40 defines an enlongated, elliptical pattern having
curvillinear limits at opposite ends as opposed to a rectangular
pattern with essentially square corners.
Each bin 26 is mounted on conveyors 32 for movement in a number of
directions relative thereto and also for complete removal from
conveyors 32. To this end, a special arm 46, generally trapezoidal
in configuration, is provided for each end of each bin 26 and is
secured to its corresponding chain 40 in cantilever fashion as
shown best in FIG. 3. An elongated, open-ended slot 48 in each arm
46 is adapted to receive a grooved, inner roller 50 of a double
roller assembly 52 (FIG. 7) mounted on the corresponding end of bin
26. Assembly 52 further includes an outer roller 54 serving as a
cam follower as will hereinafter be explained in detail, both of
the rollers 50 and 54 being rotatably supported by a common spindle
56 projecting outwardly from the end wall of bin 26. It is
important to note that rollers 50 and 54 are rotatable
independently of one another and that, by virtue of the rotatable
relationship between roller 50 and spindle 56, bin 26 is free to
pivot relative to conveyor 32 about a horizontal axis as well as to
move inwardly and outwardly on its arms 46.
Each side of compartment 20 is also provided with a pair of
vertically extending, U-shaped channels 58 disposed on opposite
sides of the corresponding conveyor 32 for shiftably receiving an
elongated guide block 60 affixed to each arm 46. A pair of
identical, rectangular castings 62 are disposed at opposite limits
of each conveyor 32 for effecting a part of the needed control for
bins 26 as the latter change their directions of travel. As shown
most clearly in FIG. 11, each casting 62 includes a basic planar
portion 64 from which a number of areas project in relief, such
areas including a three-sided, square-cornered boss 66, the outer
surfaces 66a of which function as guide surfaces for rollers 54,
and a U-shaped, limiting rib 68 which surrounds the sides of boss
66 and is disposed in spaced relationship to surfaces 66a thereof.
A U-shaped, confining passage 70 for rollers 54 is thus defined by
the surfaces 66a and rib 68.
Both vertical legs of passage 70 are equidistant from the center of
casting 62, the latter receiving one of the shafts 38 or 44 through
an integral collar 72. The vertical legs of passage 70 are also
generally aligned with the vertical line of roller assemblies 52 on
bins 26, although surfaces 66a are disposed slightly outwardly of
what would otherwise be the normal path of travel of assemblies 52.
Outwardly flared ends 68a of rib 68 and inwardly beveled ends 66b
of boss 66 are thus provided to facilitate entrance and exit of
assemblies 52 from passage 70.
The boss 66 of each casting 62 has a circular cavity 74 concentric
with collar 72 and provided with a vertically disposed entrance 74a
and exit 74b on opposite sides of collar 72. Entrance and exit 74a
and 74b respectively are spaced inwardly from the vertical legs of
passage 70 and are disposed equidistant from collar 72 in alignment
with corresponding ends of channels 58 for receiving and
discharging guide blocks 60 respectively. A circular plate 75 (FIG.
3) at each end of shafts 38 and 44 covers the end of its
corresponding conveyor 32 and is shiftable axially of shaft 38 or
44 to expose components therebehind (the top plate 75 in FIG. 3 has
been removed for clarity).
A large, vertically extending, U-shaped member 76 on each side of
compartment 20 is disposed centrally of the loop formed by the
corresponding chain 40 for supporting a pair of generally L-shaped,
inner tracks 78 for bins 26. Similarly constructed outer tracks 80
for bins 26 define a rectangular pattern with vertical and
horizontal stretches on each side of compartment 20 at the outer
extremes of the latter. All of the tracks 78 and 80 are covered or
coated with a friction-reducing material to minimize drag on bins
26 as the latter advance during operation.
As shown most clearly in FIGS. 1 and 8-10, each front vertical
stretch of outer track 80 includes a shiftable track section 82
which is hinged to the remaining portions of the front outer track
80 for swinging between a closed position shown by the left section
82 in FIG. 1 and in FIG. 9, and an opened position illustrated by
the right section 82 in FIG. 1 and FIG. 10. A pair of hinges 84 for
each section 82 serve the dual role of providing for swinging
movement of section 82, as well as for releasable latching of the
latter in its closed position. To this end, each hinge 84 includes
a pair of plate-like components 86 and 88 (FIGS. 9 and 10)
interconnected by a pivot 90, the component 86 being rigidly
affixed to the stationary portion of track 80 and projecting
slightly upwardly beyond the end thereof as shown in FIG. 10, and
the component 88 being affixed to section 82 for swinging movement
therewith about the axis of pivot 90. Component 88 is set in from
the extremity of section 82 an amount corresponding to the
projection of component 86 beyond the stationary portion of track
80, and components 86 and 88 are relatively shiftable toward and
away from one another along pivot 90 such that section 82 may drop
in place behind the projecting portion of component 86 when section
82 is closed, as shown in FIG. 9. In this manner, component 86
effectively latches section 82 against swinging out of its closed
position until section 82 is first raised a sufficient distance to
clear component 86.
OPERATION
In practice the merchandiser is provided with suitable control
apparatus (not shown) which is responsive to the deposit of coinage
in coin slot 16. Upon deposit of a predetermined amount of credit,
such apparatus is operable to unlock one of the doors 30 which have
been pre-set to unlock at such credit level and the selected door
30 may then be opened for access to a product contained in the
corresponding stall therebehind. Either before or after such
coinage has been deposited, but not while any of the doors 30 is
open, the customer may actuate button 18 to operate conveyor 32 and
thereby bring bins 26 in succession past window 24 and doors 30. In
this manner the customer may effectively shop for the product of
his choice until such product has been located and brought into
registration with Station 28.
The arms 46 are spaced along the length of each chain 40 a distance
which will cause the bins 26 to be disposed in close proximity to
one another as they move along the vertical stretches of their
rectangular path of travel. This close spacing is desirable not
only from the standpoint of a mutual stabilizing action created
between successive bins 26, but also because of the fact that the
available space within compartment 20 is thus utilized to its
fullest possible extent. Note that such close spacing of bins 26 is
a function of the "squareness" of the corners of their path of
travel. That is, with an increasing degree of arcuate movement of
bins 26 during their change of direction at the limits of conveyors
32, it becomes necessary to correspondingly space bins 26 a greater
distance apart to avoid mutual interference during such change of
direction. This, of course, decreases the number of bins 26 which
may be carried by conveyors 32, hence decreasing the number of
products which may be stored within the compartment 20. Thus, the
corners turned by bins 26 should be as square as possible.
Because of the generally elliptical path followed by chain 40 of
each conveyor 32 with its arcuate end limits, conveyors 32
inherently seek to move bins 26 in a similar path of travel.
However, by virtue of cam castings 62, bins 26 are forced to turn
square corners resulting in an overall rectangular path of travel.
This action is shown diagrammatically in FIGS. 12-14 wherein a bin
26 moving in a counter-clockwise direction is shown approaching a
lower corner of its path of travel in FIG. 12, then precisely at
its corner in FIG. 13, and then leaving the corner in FIG. 14. As
the bin 26 approaches its FIG. 12 position, the follower 54 at each
end of bin 26 enters the first vertical leg of its corresponding
passage 70, riding against the surface 66a of boss 66.
Simultaneously, the corresponding roller 50 is moved outwardly in
its arm slot 48 as surface 66a acts upon follower 54 and as guide
block 60 enters entrance 74a to cavity 74. Further advancement of
the chains 40 around their sprockets 42 causes relative shifting
between bin 26 and chains 40 as surface 66a forces follower 54 and
hence roller 50 toward the mouth of slot 48 until bin 26 reaches
its FIG. 13 position. During this latter advancement, both ends of
block 60 enter cavity 74 and bear against the walls 74c thereof to
stabilize arm 46.
As bin 26 leaves the corner moving into its FIG. 14 position, the
horizontal stretch of rib 68 forces follower 54 inwardly such that
roller 50 shifts back into slot 48. By virtue of rib 68, bin 26 is
thus positively held at a constant elevation along its horizontal
stretch and is maintained under constant control in spite of the
fact that bin 26 tends to gravitate away from boss 66 during this
period. As bin 26 then approaches the lower right corner, the
action is identical to that having previously occurred between its
FIG. 12 and FIG. 13 positions as surface 66a forces assembly 52 to
move outwardly of slot 48 until the corner has been cleared. Upon
leaving the lower right-hand corner, guide block 60 moves through
exit 74b and into channel 58.
Not only are the bins 26 thus forced to move in a rectangular path
of travel with square corners, but they are also maintained against
tipping about spindles 56 during such movement. Note that tracks 78
and 80 cooperate on the vertical stretches of bin travel to guard
against such tipping, while track 80 serves this function in
conjunction with passage 70 during change of direction of bins 26
and along their horizontal stretches of travel. The combined
control by castings 62 and track 80 during such horizontal travel
and abrupt changes of direction assures that bins 26 are very
positively restrained and confined, yet power loss due to friction
is minimized because the load is borne by roller assemblies 52 and
not by the stabilizing outer track 80.
In spite of the high amount of control exercised against bins 26,
removal thereof from compartment 20 is extremely simple by virtue
of the hinged track sections 82. Thus, should it become necessary
to remove bins 26 for cleaning or other servicing, it is but
necessary to lift both sections 82 until they clear their
respective hinge components 86, whereupon sections 82 may be swung
to their opened positions to free bins 26 brought into alignment
with the removal area. The open-ended slots 48 in arms 46 clear
roller assemblies 52 as each bin 26 is withdrawn. Replacement of
bins 26 is just as easily effected by simply reinserting the roller
assemblies 52 thereof into their corresponding slots 48 and then
closing sections 82.
* * * * *