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Патент USA US3058585

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Oct. 16, 1962
c, J. ARNDT ETAL
3,053,575
AUTOMATIC TWO DIRECTIONAL BELT TRAINING
TROUGHING IDLER ASSEMBLY
Filed Nov. 20, 1959
2 Sheets-Sheet 1
m w mm 5
“M9
BY
Charles J. Arndt
Ralph F Risse
Oct. 16, 1962
c. J. ARNDT ETAL
3,058,575
AUTOMATIC TWO DIRECTIONAL BELT TRAI NING
TROUGHING IDLER ASSEMBLY
Filed Nov. 20, 1959
2 Sheets-Sheet 2
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INVENTORS.
Charles J. Arndt
BY
Ralph F' R1336
United States Patent O??ce
1
2
tions substantially displaced from the perpendicular with
3,058,575
AUTOMATIC TWO DIRECTIUNAL BELT - T‘
3,®58,575
Patented Get. 16, 1962
respect to the direction of belt travel.
Other objects and advantages of the invention will be
come apparent from the following description and draw
2 »
ING TROUGIWG IDLER ASSEMBLY
Charles J. Arndt, Harvey, and Ralph F. Risse, Chicago,
111., assignors to Goodman Manufacturing Company,
Chicago, llll., a corporation of Illinois
Filed Nov. 20, 1959, Ser. No. 854,509
6 Claims. (Cl. 198—202)
logs.
The invention is illustrated more or less diagrammati
cally in the accompanying drawings, wherein:
FIGURE 1 is a top plan view with the belt omitted
of one embodiment of the invention;
FIGURE 2 is a view taken substantially along the line
This invention relates to ?exible strand conveyors, and
particularly to an automatic training idler assembly for
2—2 of FIGURE 1;
‘such conveyors which automatically repositions a con
veyor belt on the assembly as it passes thereover in a de
FIGURE 3 is a detailed, sectional view on an enlarged
scale taken substantially along the line 3—3 of FIGURE
1 illustrating the connection of a guide roller to the end
trained condition.
Flexible strand conveyors of the type illustrated in the 15
Craggs et al. Patent No. 2,773,257 have come into wide
brackets;
spread use in recent years due to their many inherent
the invention;
desirable features. Among these features are high car
rying capacity, low cost, and ease of installation and main
other modi?cation of the invention;
tenance.
FIGURE 5 is a diagrammatic representation of an
20
This type ‘of conveyor generally comprises a pair of
?exible rope sideframes such as Wire ropes which are
FIGURE 4 is a diagrammatic View of a modi?cation of
FIGURE 6 is a diagrammatic representation of the rel
ative positions of the training roller assembly and the
belt when the belt is detrained to the left;
strung along a conveying course such as a mine run or
FIGURE 7 is a diagrammatic representation of another
embodiment of the invention in which the bracket pivot
by support structures such as the telescoping support 25 points are located inwardly with respect to the ends of
stands shown in the Craggs et al. patent, or by root bolts
the roller assemblies;
the like.
The strands are supported at suitable intervals
or other overhead supporting means. A plurality of con
‘FIGURE 8 is a modi?cation of the structure diagram
veying idler assemblies are suspended from the strands at
matically illustrated in FIGURE 7; and
generally equal increments therealong to form a bed for
FIGURE 9 is a further modi?cation of the structure
the conveying reach of the ?exible belt. Return roll-er 30 diagrammatically illustrated in FIGURE 7.
assemblies, which may be suspended from the ?exible
Like reference numerals will be used to refer to like
rope side frames or by independent supporting structure
parts throughout the following description of the draw
such as the ?exible rope side frame support stands, are
mgs.
likewise located at intervals along the conveyor to furnish
In FIGURE 1, a pair of ?exible side frames in a ?ex
support for the return reach of the belt. Usually the 35 ible strand conveyor of the type illustrated in the Craggs
return roller assemblies are spaced at considerably greater
et al. Patent No. 2,773,257 are indicated at 10 and 11. A
distances than the conveying idler assemblies since they
support no load other than the weight of the belt itself.
pair of V-shaped brackets indicated generally at 12 and
13 are pivotally connected to the strands by pivot pin
‘Maintaining the belt centered or trained on the con
veying idler assembly in a ?exible rope side frame con
veyor is a problem common to all rigid and non-rigid
assemblies 14 and 15 Welded or otherwise secured to
suitable rope ‘clamps 16 and 17. Since the exact struc
ture of the clamps does not, as such, form a part of the
conveyor installations.
invention, it is not further illustrated.
As a belt passes over a roller, the
resultant friction between the two moving surfaces gen
The details of the securement of bracket 13 to rope
erates a training force which is directed generally perpen
45 clamp 17 is illustrated best in FIGURE 3. The pin as
dicularly to the longitudinal axis of the roller. If the
sembly includes a base 18 welded as at 19 to the top of
roller is improperly installed or knocked out of line after
the clamp. The reduced shank portion 20 of the pin
installation by any one of a number of causes such as
falling rock or by being bumped with machines, the train
ing e?ect may be exerted in a detraining direction.
Accordingly, the primary object of this invention is to
provide an automatic belt training idler assembly which
passes upwardly through aperture 27 in the end bracket.
Vertical travel of end ‘bracket 13 along the pin is pre
vented
by washer 21 and cotter pin 22. The connection
50
of the end brackets to the clamps is not so tight as to
prevent relatively free rotational or swinging movement
of the bracket about the pin.
automatically repositions or retrains the belt as it passes
thereover in a detrained condition.
Each end bracket 12 and 13 includes forwardly, in
Another object is to provide an automatic belt training 55 wardly directed arms 23 and 24, respectively, and rear
wardly, inwardly directed arms 25, 26, respectively. The
idler assembly utilizing a pair of conveying roller as
terms forwardly and rearwardly are used with respect to
semblies which imparts, as compared to a single roller as
sembly, a double training effect to the belt for any given ' the direction of belt travel, which direction is indicated
generally by the arrow T. Inwardly is used in the sense
increment of inclination of the idler assembly.
Yet a further object is to provide a belt training idler 60 that a projection extending from one ?exible strand to
ward the other is directed inwardly toward the longitu
assembly which automatically repositions a belt on the
dinal axis of the conveyor.
assembly as it passes thereover in a detrained condition
The terminal ends of legs 23-26 are notched to receive
and which does not increase the width of the conveyor.
generally L-shaped connecting lugs 30, 31, 32 and 33.
A further object is to provide a belt training idler as
Lug 31 is welded to leg 24, as illustrated at 34 in FIG
sembly which automatically repositions a belt on the as 65 URE 3, and its inwardly extending portion is slotted to
sembly as it passes thereover in a detrained condition and
form a pair of parallel cars 35 and 36, shown best in FIG
which does not project outwardly beyond the boundaries
of the conveyor.
Yet another object is to provide an automatic belt train
ing roller assembly utilizing a pair of training roller as
semblies mounted in tandem fashion, and movable to posi
URE 2; The inwardly extending portion of connecting
lug 30 is similarly slotted to form a pair of cars 37
70 and 38.
A troughing roller assembly of the sausage type similar
to that illustrated in the Craggs et al. patent is indicated
3,058,575
3
generally at 40. The assembly includes a center pri
mary belt training roller 41 ?anked by a pair of end
or wing rollers 42 and 43. Center roller 41 is mounted
for rotation about a dead shaft 44, and wing rollers 42,
43 are mounted for rotation about dead shafts 45 and 46,
respectively. The abutting shaft ends are linked together
for movement in a generally vertical plane by chain links
47, 48 which are secured by suitable pins, not numbered,
to the shaft ends.
The outer ends of the wing roller shafts 45, 46 are 10
received between the parallel ears or ?ats 37, 38 and
to end brackets 12 and 13 which in turn are pivotally
connected to the strands 10 and 11 as at 14 and 15.
When the conveying reach 51 of the ?exible conveyor belt
passes over the assembly in the centered or trained posi
tion illustrated in FIGURE 2, the two troughing idler
assemblies will assume the position illustrated in FIG
URE 1.
g
It is well known that a roller over which a ?exible belt
‘passes exerts a training effect on the belt. This training
35,736 and held in place thereby connecting pivot pins 49
and 50. The roller assembly assumes a troughing contour
effect may be stated, in general, to be exerted in a direc
which supports the conveying reach 51 of a ?exible con
15
veyor belt, as best illustrated in FIGURE 2.
4
assembly due to the action between the underside of the
belt and the rollers in the assembly.
In FIGURES 1 and 2; upstream and downstream
troughing roller assemblies 40, 52 are pivotally connected
tion generally perpendicular to the longitudinal axis of
lel to the longitudinal axis of the conveyor are apertured
as at 60. Aperture 60 in downstream lug 31 receives
the roller. So long as the direction of belt travel and
the direction of the training force between roller and belt
are parallel, the belt will not move from side to side along
the assembly. If the roller is canted at an angle to the
belt and the direction of the training ‘force for-ms an angle
with the direction of belt travel, the belt will tend to
move in the direction of the training eliect until it
reaches a condition of equilibrium on the roller.
rollers are substantially identical.
Roller 64 rotates in a pair of ball bearings 65, 66 held
and the belt will run centered over the entire assembly,
as illustrated in FIGURE 2. In this condition, the belt
A similar troughing roller assembly is indicated gen
erally at 52. In brief, it consists of a center load carry
ing roller 53 ?anked by wing rollers 54 and 55 whose
shafts 56 and 57 are connected at their outer ends by
pins 58 and 59 to connecting lugs '32. and 33.
Those
portions of each of the lugs which extend generally paral
Thus, in FIGURE 1, for example, the direction of
shaft 62 which carries guide roller 64. A similar guide
roller 63 is carried by lug 30, but for purposes of explana 25 .travel T of the conveyor belt 51 and the direction in
which the training effect or force F is exerted are parallel,
tion, a description of roller 64 will su?ice, since the
in spaced relationship by sleeve 67 surrounding shaft 62.
Bottom bearing 66 rests on a pairof bearing rings, not
numbered, the center ring in turn resting on a spacer 68.
A cotter pin 69 or other suitable securing means pre
vents unintended vertical movement of the shaft 62 and
consequently the roller 64.
.
. Variations of the basic assembly illustrated in FIG
URES 1 through 3 are shown in FIGURES 4 and 5.
In FIGURE 4, the center roller of the upstream roller
assembly and the wing rollers of the downstream roller
will not contact the guide rollers 63, 64 and correspond
ing rollers in each of the troughing roller assemblies 40,
52 will line up with one another.
FIGURE 6, however, illustrates the condition of the
troughing idler assembly when the belt is detrained. In
the instantaneous position shown, the belt has detrained
to the left until its edge contacts guide roller 63. Since
the end brackets 12 and 13 are pivotally connected to
the flexible strands and to the troughing idler assemblies,
respectively, the downstream assembly tends to shift to the
left under the impact of the belt against the guide roller
the wing rollers of the downstream troughing roller as 40 while the upstream assembly conversely shifts to the
right. As a consequence, the training effect P is directed
sembly have been eliminated. In all other respects, these
at a slight angle to the direction of belt travel T, as il
embodiments are substantially identical to that illustrated
lustrated by the divergent arrows in FIGURE 6. The
in detail in FIGURES 1 through 3, and accordingly the
' assembly have been eliminated. Likewise, in FIGURE 5,
‘other structural connections have been indicated only
diagrammatically.
In FIGURES 7, 8, and 9, modi?cations of the inven
training e?ect P will gradually force the belt to the right,
and, as the belt moves to the right, the entire assembly
will move back to the position illustrated in FIGURE 1.
The same condition will be maintained when the conveyor
tion are illustrated in which the pivotal points of con
detrains to the right.
>
nection of the end brackets to the ?exible strands of the
In FIGURES 7 through 9, variations of the basic in
conveyor or other support means lie inwardly from the
ends of the brackets joining the roller assemblies to the 50 vention are shown in which the pivotal connecting points
of the end brackets to the ?exible strands lie inside the
end brackets.
points of connection of they troughing idler assemblies to
Thus, in FIGURE 7, downstream troughing roller as
the end brackets. In this instance, the guide rollers 78,
sembly 40 is pivotally connected to the end brackets 70
79 are located on the upstream troughing idler assembly.
and 71 at 72 and 73; The end portions of upstream
As the belt detrains to the left as viewed in FIGURE 7,
troughing idler assembly 52 have likewise been connected 55
due to any one of a multitude of reasons including im
to end connecting brackets 70, 71 at 74, 75. The brackets
proper =belt loading, poor belt splices or a kink in the
are pivotally connected as at 76, 77 to suitable support
belt, it strikes guide roller 78 and moves it along the
ing structures such as the ?exible strands or other sup
path indicated by the dotted arrow 80 since the roller is
porting means. The pivotal bracket connecting points
76 and 77 lie between a line passing through points 74, 60 pivoted about connecting point 76. At the same time,
72 and another line passing through points 73, 75. Guide
‘rollers 78, 79 are connected to the upstream legs of end
brackets 70, 71 in substantially the same manner as
right guide roller 79 moves along the path indicated by
dotted arrow 81 since it is pivoted about connecting point
77. The end result is to swing or twist the entire assembly
into a training position in which the training force indi
illustrated in detail in FIGURE 3.
catedby the dotted arrow F is oriented into a retraining
In FIGURE 8, the center roller of the upstream roller 65 position, very similar to the result illustrated in FIG
.assembly and the wing rollers of the downstream roller
URE 6.
.
assembly have been omitted. Likewise, in FIGURE 9,
In FIGURES 4 and 5, and 7 and 8, variations are shown
the wing rollers of the downstream roller assembly 40
in which certain rollers in the troughing roller assemblies
70 are omitted. The training e?ect of the ‘assembly is not
The use and operation ‘of the invention is as follows:
reduced substantially so long as at least one center primary
training roller and a pair of wing rollers are retained.
This invention provides means for automatically re
have been omitted.
I
training an off-center conveyor belt in a ?exible belt con
These embodiments have, the further advantage of being
somewhat lighter in weight than the structure illustrated
sults solely from the repositioning of the troughing idler 75 in FIGURE 1, for example, but it is often desirable to
veyor. The training effect is entirely automatic, and re
5
3,058,575
utilize two complete idler assemblies in order to provide
maximum stability for the belt.
One of the important features of the invention is the
3. An automatic belt training troughing idler assembly
for a ?exible sideframe conveyor having longitudinally
extending side strands, said troughing idler assembly in
fact that a considerably greater twist can be imparted
cluding, in combination,
to the roller assemblies than is possible in present two 5
a pair of end frame members,
direction training roller assemblies whose center or inter
?rst pivot means connected to each of said end frame
mediate rollers remain substantially transversely positioned
with respect to the direction of belt travel. With the
present structure, the assemblies can be positioned at
training angles of 7° or 8° or even higher, as contrasted 10
with training angles of only approximately 2° attainable
with many present two direction training roller assemblies.
Actually, the training effect imparted to the belt may be
considerably greater than three to four times the amount
obtainable with present training assemblies since the center 15
or intermediate roller as well as the wing rollers are
members substantially at their midpoints, .said ?rst
pivot means being adapted to connect said end frame
members to corresponding side strands for pivotal
movement relative thereto,
?rst and second elongated roller means,
second pivot means for pivotally connecting the end
portions of each of said ?rst and second roller means
to corresponding end frame members in spaced, gen
erally parallel tandem relationship substantially trans
versely of the side strands to thereby enable the roll
re-oriented into a training position. It is only necessary
er means to move in substantially transversely op
therefore to place one of these assemblies in a conveyor
line every 100 to .1504 feet depending on the particular
posite directions with respect to one another and to
freely assume canted positions with respect to the
longitudinal axis of the conveyor in response to move
ment of the belt thereacross in an elf-center position,
said ?rst pivot means being located transversely out
Wardly from the second pivot means.
operating conditions, and the balance of the conveyor may
consist of standard assemblies
Anther important feature is the fact that this training
effect is achieved without increasing the width of the con
veyor, since in the embodiments shown in FIGURES 1
4. An automatic belt training troughing idler assembly
through 6, all of the structure lies between the strands. 25 for a ?exible sideframe conveyor having longitudinally
A single roller assembly exerting a similar effect would
extending side strands, said troughing idler assembly in
require either supporting structure wider than the gauge
cluding, in combination,
of the strands or a special relatively expensive roller
a pair of end frame members,
positioning framework.
A further important feature is the fact that a pair of 30
roller assemblies are secured to the strand in training re
members substantially at their midpoints, said ?rst
pivot means being adapted to connect said end frame
lationship by only a single pair of connectors. In many
current schemes for automatically training the belt as it
passes over the roller assembly each troughing idler as
sembly requires a pair of strand connecting devices.
?rst pivot means connected to each of said end frame
35
The foregoing description is illustrative only and not
de?nitive. Accordingly, the invention should not be
limited except by the scope of the following appended
claims.
40
We claim:
1. An automatic belt training troughing idler assem
bly for a ?exible sideframe conveyor having a pair of lon
gitudinally extending side strands, said troughing idler
assembly including, in combination,
45
a pair of end frame members,
?rst pivot means adapted to connect each of said frame
members to a corresponding side strand which en
ables each frame member to pivot relative to its as
sociated side strand,
?rst ‘and second elongated roller means and
second pivot means connecting the end portions of each
of said ?rst and second roller means to the end
frame members in spaced, generally parallel tandem
relationship substantially transversely of the strands
to thereby enable the roller means to move in sub
stantially transversely opposite directions with re
members to corresponding side strands for pivotal
movement relative thereto,
?rst and second elongated roller means,
second pivot means for pivotally connecting the end
portions of each of said ?rst and second roller means
to corresponding end frame members in spaced, gen
erally parallel tandem relationship substantially
transversely of the side strands to thereby enable the
roller means to move in substantially transversely
opposite directions with respect to one another and
to freely assume canted positions with respect to
the longitudinal axis of the conveyor in response to
movement of the belt thereacross in an off-center
position,
said ?rst mentioned pivot means being located trans
versely inwardly from the second pivot means.
5. The assembly of claim 3 further characterized by
and including a pair of generally vertical axised belt guide
rollers carried by said end frame members, said guide
rollers being located adjacent the end portions of the
downstream one of said roller means.
6. The assembly of claim 5 further characterized by
and including a pair of generally vertical axised belt
gudie rollers carried by said end frame members, said
‘guide rollers being located adjacent the end portions of
spect to one another and to freely assume canted posi
the upstream one of said roller means.
tions with respect to the longitudinal axis of the con
veyor in response to movement of a belt therecross
References Cited in the ?le of this patent
in on off-center condition to thereby automatically 60
urge the belt to a centered position.
UNITED STATES PATENTS
2. The assembly of claim 1 further characterized in
that said end frame members are generally V-shaped ele
ments, said ?rst pivot means being located adjacent the
apex of each of said V-shaped elements and the second 65
pivot means being located adjacent the free end of each
leg of said V-shaped elements.
1,770,957
‘1,927,849
1,963,099
2,892,534
2,983,364
Veale ________________ __ July 22,
Roberts ______________ __ Sept. 26,
Robins ______________ __ June 19,
Ogden _______________ .._ June 30,
Lo Presti ______________ _. May 9,
1930
1933
1934
1959
1961
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