U.S. patent number 3,599,784 [Application Number 04/883,796] was granted by the patent office on 1971-08-17 for automotive continuous conveyor of an articulated type.
Invention is credited to Lionello Rossi.
United States Patent |
3,599,784 |
Rossi |
August 17, 1971 |
AUTOMOTIVE CONTINUOUS CONVEYOR OF AN ARTICULATED TYPE
Abstract
The invention relates to a mobile conveyor wherein an endless
conveyor means is mounted on a vertically telescopic framework so
that the conveyor means may be raised or lowered to different
heights. Further, the conveyor means is itself rotatable about a
vertical axis. Respective sections of the conveyor means are
articulated to each other whereby they may assume a mutually
coplanar orientation when in use, or a compact folded orientation
when being transported.
Inventors: |
Rossi; Lionello (Rome,
IT) |
Family
ID: |
11253512 |
Appl.
No.: |
04/883,796 |
Filed: |
December 10, 1969 |
Foreign Application Priority Data
Current U.S.
Class: |
198/313;
198/316.1; 198/632 |
Current CPC
Class: |
B65G
21/14 (20130101) |
Current International
Class: |
B65G
21/14 (20060101); B65G 21/00 (20060101); B65g
021/12 (); B65g 041/00 () |
Field of
Search: |
;198/233,213,115,126,117,121,124,88,87 ;214/5.2,83.26 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Aegerter; Richard E.
Claims
I claim:
1. A continuous conveyor device of an articulated type supporting a
common endless conveyor means and carried on a frame mounted on
wheels of a variable gauge and provided with a motor and other
means to make the machine automotive, wherein said machine
comprises a central telescopic turret, the upper part of which is
connected to the conveyor device through means adapted for rotation
of said conveyor device round a vertical axis, said conveyor device
comprising a central section supported by the said rotary means
with the interposition of an articulated frame and two side arms
pivotally connected at the ends of the said central section and
having coplanar longitudinal axes, each of said two arms being
constituted of three sections articulated to each other about
horizontal pivot axes, first operating means being associated with
said sections forming the said articulated arms, which are adapted
to cause said sections, when aligned, to perform angular movements
with respect to the central section of the conveyor device, and
second operating means which act in combination with articulated
guiding means being provided to force each of the said sections to
rotate with respect to the adjacent section of both arms until each
outer section of said arms is pivoted in a horizontal position and
rest on the central section, while the other two intermediate
sections of each arm are pivoted into their upright positions and
rest one on the other facing the back/and the front of the machine,
or to perform the same movements in an opposite sequence, at the
free end of the outer sections of both arms a return roller being
arranged to support the upper working run of the endless conveyor
means, while near the central part of the return run of said
endless conveyor means a driving roller and a tensioning roller are
arranged having parallel axes and spaced apart from one another of
an adjustable distance and round which passes the endless conveyor
means travelling along a S-like path including two reversals of the
advancing direction of said endless conveyor means, thus enabling
to adjust the tension of said endless means by duly varying the
mutual distance of said two rollers.
2. A continuous conveyor device according to claim 1 wherein the
tensioning roller is carried by movable supporting members enabling
to moving said tensioning roller to and from the driving roller so
that the increase and decrease of the tension of the endless
conveyor means depends upon the adjustment of the distance between
the movable tensioning roller and the stationary driving
roller.
3. A continuous conveyor device according to claim 1, wherein the
telescopic central turret is constituted by a plurality of
collapsible sections, the lowermost of which is fixed to the wheels
frame of the machine and the uppermost one is connected to the
central section of the conveyor device through means provided for
rotation of said conveyor device round a vertical axis and through
an articulated frame provided for rotation of said central section
about a horizontal axis, said rotary connecting means as a center
plate associated with a female center plate and said articulated
frame being actuated respectively by operative devices as jacks or
the other suitable device having a variable length.
4. A continuous conveyor device according to claim 1, wherein a
system of pairs of guiding rods are associated to each of the said
articulated arms and is provided to coordinate the movements of the
sections forming each arm, said pairs of rods being pivotally
connected at one end to a common pin and at the other end to the
various sections of the same arm and to the central section of the
conveyor through a L-shaped plates which are connected to the ends
of the central section respectively each of said L-shaped plates
including a long leg projecting downwards, said long leg of each of
the L-shaped plates, supporting an operating device having a
variable length which is pivotally connected to said leg and to the
central section at a point near the adjacent end of it, while
another operative device having a variable length is pivotally
connected between said leg and a point of the end of said arm
adjacent the central section of the conveyor device, said second
operative device controlling the folding and unfolding operations
of said arm, in cooperation with the said articulated guiding rod
system.
5. A continuous conveyor device according to claim 1, wherein the
length of the central section of the conveyor device is
substantially equal to that of each of the outer sections of the
articulated arms and is substantially not longer than the length of
the wheeled frame, while the length of each of the two intermediate
sections of both arms is substantially equal to the amount of the
height of the turret in its collapsed position and of that of the
supporting wheeled frame in such a way that, as the machine is in
its stowage position, the pairs of upright positioned sections of
the conveyor device facing the back and the front of the machine
nearly approach the ground.
Description
The invention relates to a continuous conveyor device including an
endless conveyor means and mounted on a wheeled frame, said
conveyor device being associated with a motor or engine which may
drive alternately either the endless conveyor means and the control
devices associated therewith, or the same conveyor machine which
has to act as a self-moving machine.
A particular characteristic of the invention consists in the fact
that the conveyor device has a plurality of sections which are
pivotally connected one to the other and are designed for
supporting the endless conveyor means, wherein the conveyor device
is adapted for movement from an operative to an inoperative
position in which the said sections are folded, enabling the
conveyor device to occupy a little space and to attain a very
compact arrangement which does not exceed the clearance gauge
compulsory for the vehicles intended to be used for transporting
load and for self-moving working machines, which have travel along
roads. Said folded sections may be also caused to attain an other
inoperative position or stowage positioning which they occupy a
minimum space. In this stowage position the machine has a volume
comprised within the loading gauge of a truck or a trailer.
Therefore, when the machine is in this arrangement, it may be put
on a truck or on a trailer for transferring the machine over great
distances. In the same way, that is to say, when the machine
occupies the minimum space, it can be enclosed in a packing
container or the like and in this arrangement it can be shipped or
sent by rail.
The known self-moving conveyor devices having endless conveyor
means, as a belt or other endless device, are adapted to convey
material only until limited distances. Further only few types of
them can be positioned so as to occupy a minimum space when they
are in their stowage position, but for attaining such a purpose it
is necessary to remove the belt or the like and to disassemble the
several sections forming the supporting frame of said belt, that
must be accomplished, if the conveyor device has to be transferred
from a location to another and in the case wherein its length
exceeds the value which is prescribed for self-moving the vehicles
provided to transport load along roads.
The conveyor device of the invention is characterized by the fact
that it comprises a central telescopic turret, the upper section of
which is connected with revolving means provided to allow the
conveyor device to rotate round a vertical axis and with other
means enabling the side arms together with a central section, which
form the conveyor frame supporting the conveyor means, to rotate
along vertical planes, said articulated arms being arranged one in
prosecution of the other, and being each constituted of three
sections articulated to each other about horizontal pivot axis. The
sections forming said arms are associated with first driving means
adapted to cause the sections of each arm to perform angular
movements with respect to the central part of the conveyor device
supported by the said turret, and with second driving means
provided to work in combination with articulated guiding means and
adapted to cause each of the said three sections of each arm to
perform angular displacements with respect to the adjacent
sections, so that the outer sections are pivoted until they rest
one other and/or on the said central section, while the other two
intermediate sections are pivoted upright until they rest on each
other on the front and back respectively of the machine. At the
free end of the outer sections a return roller is provided to
support the conveyor belt and to maintain it under tension along
its upper working, while near the central portion of the lower
return run of said belt two parallel rollers are provided, namely a
driving roller and a tensioning roller which are spaced apart one
from the other of an adjustable distance so that, as the belt
passes round them, it performs a S-like path which comprises two
reversals of the travel direction, that enabling the adjustment of
the tension of the belt by varying distance between said two
rollers. As compared with the conveyor devices of a known type, the
conveyor device of the invention has the following advantages:
a. It permits the material to be delivered at considerable
distances from the machine, as for instance, until about 25 m. By
means of automated operations the length of the machine can be
quickly reduced so that the machine can have a total length of only
7 to 10 m. and a total height of a minimum value adapted to comply
with the rules of the road traffic code in force in the different
countries. In such an arrangement the volume of the machine is
comprises in the loading gauge, so that said machine could be
mounted on a truck or a trailer, in the case wherein very long
distances have to be covered at high speeds, which the self-moving
machine of this invention could not reach by self, since even if
said machine is automotive, it can cover only the little distances
concerned with its specific employments, and, as all the known
working self-moving machines, it can travel only with speeds
comprised in a very small speed range.
b. When the machine is arranged in an other inoperative position,
it occupies a space comprised within the clearance gauge of the
autovehicles, provided by the road traffic code so that, when the
machine is in such an inoperative position it can travel along a
road and cover the small transferring distances, now acting as a
self-moving vehicle. For such purposes the machine of the invention
is provided with variable-gauge wheels, so that said gauge may be
varied from a minimum value of about 2.20 m. for the case wherein
the machine must be transported on a truck or trailer or is
inserted in a packing container or other suitable boxing means, to
a value of 2.50 m. which enables the machine to travel on road,
acting as a self-moving vehicle, until a maximum gauge of about 4
m. to be used as the machine must run on hilly ground, as, for
instance on a building yard, that is to say, when it is necessary
that the machine has the maximum of stability in order to prevent
overturning movements and that can be obtained, as well known, by
making its bearing base as wide as possible.
Other objects and advantages of the machine of the invention will
be apparent upon consideration of the following description of one
embodiment of the invention, given merely by way of an indicative
example and not as limiting the invention and with reference to the
accompanying drawings, in which:
FIG. 1 is a diagrammatic side view of the machine carried on a
trailer drawn by a truck;
FIGS. 2 and 3 are diagrammatic side views of the machine, as it
acts as a self-moving vehicle and is descending from the trailer
(FIG. 2), and as it is travelling along a road (FIG. 3)
respectively;
FIG. 4 is a diagrammatic side view of the machine, wherein one of
its two foldable arms supporting the conveyor means projects
outward beyond the central section of the conveyor device and is
unfolded in its horizontal position, while in broken and dotted
lines respectively are illustrated two successive positions of the
sections constituting said arm and of the means cooperating
therewith during the unfolding stage while the other arm is already
arranged in its folded position,
FIGS. 5 to 9 are side partial views illustrating different
operative positions of the elevator-conveyor device, the guiding
means of which have been removed;
FIG. 10 is a plan partial view of the machine, while by broken and
dotted lines are illustrated two different positions of the
conveyor device, as it has been angularly displaced towards one
side or the other with respect to the longitudinal vertical center
plane X-X of the base frame of the machine;
FIG. 11 is a diagrammatic side view of the machine, in an enlarged
scale shown as the conveyor device has been unfolded in a
horizontal plane, in this FIG. the outer portions of side arms of
the conveyor device have been cross sectioned with the vertical
planes H-H and X-X respectively and the corresponding end portions
of said arms are removed and shown below the representation of the
central part of the machine;
FIG. 12 is a side view similar to that of FIG. 11, but with the
upper portion of the conveyor device longitudinally sectioned along
a vertical longitudinal plane in order that the inner path of the
conveyor belt may be seen. In this FIG. neither the means
supporting the belt nor the devices which concern the belt movement
have been shown; in this FIG, as in FIG. 10, the end portions of
the arms of the conveyor device, have been broken away and
displaced below the representation of the central portion of the
machine.
With reference to the drawings will be at first briefly indicated
and described the main parts of the machine and their mutual
dispositions so as to allow to explain the various performances of
the machine so that may be better later understood the features and
the operative system of the driving means associated therewith.
The machine has a base frame 1 mounted on wheels 2 of a
variable-gauge type. At one of the sides of the frame 1 is
positioned a driver's compartment 3 and a driving apparatus
generally marked 4 including all the conventional devices for
making the machine automotive and conventional power takeoff means
provided to drive the various operative devices of the machine.
Provision could be made to have independent engines for the
different operations or, optionally, motors could be used which are
fed of power sources of different types. On the frame 1 a
telescopic collapsible turret is arranged which is formed of a
plurality of sections 5, 5', 5", 5"40 and provided to carry and to
lift or lower the conveyor device and which is actuated by a
hydraulic central jack 6, the upper end of which is integral with
the upper section 5'" of said turret. This section 5"' is in turn
connected to a center plane or fifth wheel 7 (FIG. 3) rotarily
connected to a cooperating female center plate 7' securely fixed to
a frame 8 which supports the central plate 7' securely fixed to a
frame 8 which supports the central section 11 of the conveyor
device. Said conveyor device also comprises two side arms,
generally marked 9 and 10 (FIGS. 5 and 7) and the said central
section 11 articulated to each other by means of hinges 9' and 10'
which have horizontal axes, said parts 9, 10 and 11 being set in
line with each other in some of the operative positions of the
conveyor device, but being folded in the transferring or stowage
arrangement of the said machine. The said center plate 7 is caused
to rotate by means of a second jack 16, ran or the like (FIGS. 3
and 10) thus enabling the conveyor device to be rotated to the left
or the right hand through an angle of about 15.degree., for
instance, with respect to the longitudinal vertical center plane
X-X of the base frame 1 so as to allow the material to be raised
from or lowered towards locations on the sides of the machines, as,
for instance, in the case wherein material has to be loaded which
is piled up in the middle of the road and has to be delivered to
locations beyond the road edges, or vice versa.
The central section 11 carries the conventional running rollers
designed for supporting and guiding the belt 14, (which have not
been shown), as well as means for driving said belt and which will
be described hereinafter. The central section 11 is pivotally
connected directly at 13 to the rear end of the frame 8, while it
is connected to the front end of it with the interposition of a
third jack or a pair of jacks 17, which is pivotally connected at
19 to the frame 8 and at 20 to the section 11. The unit 8, 11 and
17 forms a triangular device, one side of which has a variable
length and is constituted by said jacks 17, which enable the
section 11 to be rotated around a horizontal axis in such a manner
that it passes from its horizontal position shown in FIGS. 1 to 5,
7, 8, 11, 12 to the inclined position shown in FIGS. 6 and 9 or to
any other position set at any desired angle with respect to the
horizontal plane.
The side arms 9 and 10 are each constituted of three sections 21,
22 23 and 21', 22', 23' respectively. Return rollers 24 for the
conveyor belt 14 are arranged at the outer ends of the sections 21
and 21' (FIGS. 3, 11, 12), said sections being pivotally connected
at 25 to the adjacent sections 22 and 22' respectively, which in
turn are pivotally connected at 27 to the inner sections 23 and 23'
respectively, which are articulated to the central section 11 at
the hinges 13 and 20 respectively (FIG. 11).
The folding and unfolding movements of arms 9 and 10 formed by the
sections 21, 22, 23 and 21', 22', 23' respectively are performed by
the interposition of L-shaped plates 26 and 26' so positioned as to
be located at one or both sides of the conveyor frame and which are
pivotally connected at 13 and 20 respectively to the frames 8 and
11 and to the frame 11 respectively. In the horizontal position of
the frames 8 and 11, the short legs of the members 26 and 26' are
horizontal and the longlegs are vertical. Between the lower end of
the long leg of the member 26 and an intermediate point of the
frame 8 is pivotally connected a fourth jack 30 and between the
lower end of the long leg of the member 26' and a point near enough
to the hinge 20 of the frame 11 is pivotally connected a fifth jack
31. By the actuation of the jacks 30, 31 and 17 may be performed
any angular displacement of the whole conveyor device so that it
passes, for instance, from the horizontal position shown in FIG. 11
to the inclined position shown in FIGS. 6 and 9 or vice versa.
Between the ends of the long leg of the L-shaped plates 26 and 26'
and a point of the sections 23 and 23' near the respective hinges
27 are arranged other jacks 32 and 32' respectively. Each of these
jacks could be, of course, substituted by a pair of jacks parallel
to each other. Said jacks 32 and 32' which are articulated to the
parts 26, 23 and 26' and 23' respectively, are provided to force
the arms 9 and 10 of the conveyor device to rotate until they are
set at the desired angles with respect one to the other or to the
section 11, all the longitudinal vertical center planes of the
various sections of the conveyor device being always maintained
complanar. An articulated guiding rod system is also provided for
each of the arms 9 and 10 adapted to coordinate the movements of
the sections and to force them to take the mutual desired angular
position. Said system comprises four pairs of rods having different
lengths 33, 34, 35, 36, which as references is made to the arm 9,
at one of their ends are pivotally connected to a common pivot pin
37, while at the other ends each pair of the longest rods 33 are
pivotally connected at 38 to a plate 39 projecting out of the end
of the section 21, near the outer end of the section 22; the pair
of bars 34 is pivotally connected to the short leg of the L-shaped
plate 26; the pair of the bars 35 is pivotally connected to the
lower part of the section 23 and the pair of the shortest bars 36
is articulated to the upper part of the section 22, the pivot axes
of the bars 35, 36 at the connecting points to the frames 23 and 22
are sufficiently spaced apart from the vertical plane passing
through the pivot axle of the hinge 27 so as to allow to generate
torques. What has been stated above with respect to the sections
21, 22, 23 can be also said again for the sections 21', 22', 23' of
the other arm 10, similar parts being marked by similar
references.
The length of the bars 33, 34, 35, 36 as well as the position of
their pivot axes and the dimensions projecting plates 39, 39' and
those of the legs of the L-shaped plates 26, 26', are determined in
such a manner that the two systems of rods are adapted to guide the
three sections of both two arms of the conveyor device on each side
of it so that they can perform the preestablished angular
movements. In particular, if reference is now made to FIGS. (3, 4
and 11), in these FIGS. the operations are illustrated which are
performed for causing the conveyor device to pass from the
operative horizontal position of FIGS. 11 and 12 to the folded
inoperative position of FIG. 3.
For such a purpose must be actuated the jacks 32 and 32'. As, for
instance, the plunger of the jack 32 performs its return stroke,
sliding into the hydraulic cylinder (FIG. 4), the section 23 tends
to move downwards and at the same time to rotate about the pivot
axis of the hinge 13. As the section 23 lowers, it draws downwards
the section 22, and since this latter is in turn pivotally
connected by the hinge 27 to the section 23 and by the bars 36 to
the pivot pin 37, as the hinge pivot 27 moves downwards, said
section 2 tends to rotate in the direction opposite to that of the
section 23, until it attains a vertical position, while said
section 22 approaches the section 23 and the pivot point 37 also
moves downwards, since it constitutes one of the movable apices of
a hinged parallelogram shaped guiding structure, the stationary
side of which is constituted by the short leg of the member 26 and
the other sides are formed by the bars 34, 35 and by the portion
concerned of the section 23 respectively. As a result of said
downwards movement of the pivot pin 37, the rod 33 acts as a stud
against the outer end of the ear plate 39 forcing this latter and
the section 21, which is integral therewith, to move upwards and,
at the same time, to rotate in the same rotary direction as the
section 22, that is to say in the clockwise direction, if reference
is made to FIGS. 3, 4 and 11. As a consequence, the sections 22, 23
will be positioned upright where the section 22 rests on the
section 23, afterwards said sections have respectively turned
through an angle of 90.degree. but in opposite directions. On the
contrary, the section 21 is pivoted, until it rests on the central
section 11 or on the section 21' of the arm 10 if this latter
section has already rotate through an angle of 180.degree. so as to
attain its folded arrangement shown in FIG. 3. Operations according
to the opposite sequence enables the parts to pass from the
positions of FIG. 3 to those of FIG. 11.
As stated above, in order to enable the parts concerned to perform
the preestablished movements, the collapsible turret must be
partially caused to vertically extended and will be then fixed in
this position in the case wherein the machine together with the
conveyor device, now in its folded arrangement (FIGS. 2 and 3) must
go on or down a carriage 12 (FIG. 2) or must travel along a road
(FIG. 3).
Other different positions of the parts are obtained by actuating
one or more of the jacks 16, 17, 30, 31. For instance, in order to
vary the angular position of the longitudinal vertical center plane
of the conveyor device with respect to the corresponding center
plane X-X of the frame 1 mounted on wheels 2 the jack 16 must be
actuated provided for controlling the rotation of said conveyor
device round a vertical axis, and which acts on the female center
plane 7' cooperating with the center plate 7. In order to vary the
angular position of the arm 9 with respect to the section 11 must
be made operative the jack 30 and for varying the angular position
of the arm 10 will be actuated the jack 31.
As it is desired to vary the inclination of the conveyor device, as
all its sections are in line, so that its longitudinal axis passes
from the horizontal operative position to any inclined operative
position (FIG. 6) the jack 17 will be actuated.
By actuating two or more of the said jacks at the same time and by
moving up and down if required the collapsible turret by means of
the jack 6 a wide range of operative positions of the conveyor
device can be obtained, some of which are illustrated in the
Figures of the accompanying drawings. As far as the conveyor device
is concerned, it is to be noted that the endless conveyor means 14
is preferably a rubber belt or an endless link strip or other
suitable means, which is only diagrammatically shown in FIGS. 3 and
12. Said belt 14 has an upper working run guided over and between
the two return rollers 24. The lower return run of this belt forms
at the central zone a S-shaped path, where said belt 14 passes
round a driving roller 40 and then round a tensioning roller 41 so
that along said path two reversals of the advancing direction of
the belt 14 take place. The tensioning roller 41 is carried by
adjustable supporting means, as for instance, a screw device 42 or
the like, enabling to adjust the tension of the conveyor belt 14 by
duly varying the distance between the stationary driving roller 40
and the movable tensioning roller 41.
The driving roller 40 is preferably driven by an oleodynamic
transmission. Provision could also be made of a pumping oleodynamic
apparatus (not shown), adapted to operate the different jacks which
is controlled from a centralized control board and includes
suitable nozzles, pipes and valves or the like. In the same way the
motion may be transmitted to the driving wheels 2 by means of two
oleodynamic motors connected one to the other in parallel and which
in combination act as a differential system, allowing the gauge of
the wheels 2 to be readily varied, said operation being performed
while suitable means are maintaining the wheels 2 lifted up away
from the ground.
In FIG. 1 the machine is in its stowage position in which the
wheels 2 are spaced apart from each other according to the minimum
gauge and the turret sections 5 to 5'" are in their collapsed
positions retracted within the lowermost section 5; the
intermediate sections of the arms 9 and 10 are pivoted upright and
are positioned at the back and the front of the machine and the
outer sections rest one on the other lengthwise the central section
11 of the conveyor device. In this arrangement the wheeled machine
may by put on a truck or on a trailer 12 (FIGS. 1 and 2) drawn by a
tractor 15 or the like or could be inserted in a container or other
boxing means in order to be shipped.
Afterwards the machine has been transported until or near the
place, where it has to be used, the turret 5 to 5'" is caused to
sufficiently raise (FIG. 2) so that the parts of the conveyor
device which are positioned at the front of said machine are raised
enough as to do not prevent the travel and the steerage of the
machine, as this latter, acting as a self-moving vehicle, comes
down by itself from the trailer 12 or the like. Before the
beginning of the travel of the machine towards its use location, it
is necessary to vary the gauge of the wheels 2 until it attains the
normal value provided for a self-moving machine which must travel
along common roadways, or said gauge must be increased until its
maximum value (dotted position of the wheels 2 in FIG 10), if the
machine must run on a uneven ground. As said self-moving machine
attains its working place, it will be put in the desired operative
position. For such a purpose the turret 5 to 5'" is caused to be
optionally extended in such a way to enable the various parts to
perform the preestablished movements in order to force the arms 9
and 10 to be unfolded (FIGS. 4 and 5). Afterwards, by varying the
height of the turret and/or by varying the angular positions of the
arms 9 and 10 with respect to the central section 11 and/or by
varying the angle of longitudinal axes of said central section 11
with respect of the horizontal plane, while always keeping the
longitudinal axes of the sections 9, 10, 11 in a same plane and/or
by rotarily moving the conveyor device about a vertical axis by
means of the rotary sliding device 7,7' driven by the jack 16 with
respect of the frame 1, any working position may be attained
adapted to convey the material along a horizontal or inclined
paths.
* * * * *