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Патент USA US2132053

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‘Oct. 4, 1938.
R. c. SOLLENBERGER ET AL
2,132,053
SELF TRAINING IDLER
Filed May 7, 1936
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Oct- 4, 1938-
R. C.~SOLLENBERGER ET AL
2,132,053
SELF ‘TRAINING IDLER
Filed may 7, 1936‘
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2 Sheets-Sheet 2
Patented Oct. 4, 1938
2,132,053
UNITED STATES PATENT OFFECE
2,132,053
_ SELF- TRAINING IDLER
Reuel Clem Sollenberger and Lee 0. Carroll,
South Bend, Ind., assignors to Dodge .Manu-'
facturing Corporation, Mishawaka, Ind, a cor
poration of Indiana
Application May 7, 1936, Serial No. 78,342
20 Claims. (Cl. 198—202)
This invention pertains to belt conveyors and posed horizontally to provide a ?at support for
more particularly to training idlers which are the belt.
employed to maintain the belt in a centered posi
In the speci?c construction shown in the draw
tion on the idler by counteracting tendencies of ings, the intermediate roll 8 is supported upon
L1 the belt toward displacement from its normal
the ?xed standards I2 and I3 which also support 5.
path of travel.
the inner ends of the training rolls 9 and II,
One of the primary purposes of our invention is respectively, the outer ends of these. latter rolls
to provide an idler which will obviate all wear on
being supported by movable standards I4 and I5,
the edges of the belt by eliminating all parts respectively. All of these standards are carried
10 which might impose any friction on said edges
upon a base It supported in any suitable man 10
and employing only frictionless devices with ner, the movable standards for the outer ends of
which the belt may contact.
the training rolls being pivotally mounted on this
Another purpose is to obtain a maximum train
base through the intermediary of ?xed standard
ing effort of the idler upon the belt and to make bases I ‘I upon which'the standards are pivoted
this training effort positive in its action.
by pintles i8. Swinging movement of each 15
A further purpose is to provide an idler which standard about its pintle is limited by abutment
will be simple in construction, durable and effec
of the lower face of the standard with the ele
tive in operation and one which will be devoid of
springs, weights, or other non-positive operating
20 parts.
For the purpose of exemplifying the principles
of our invention, one preferred embodiment
thereof is shown for illustrative purposes upon
the accompanying drawings.
25
Referring to the drawings,
Fig. 1 is a plan view of an idler embodying our
invention;
Fig. 2 is a front elevation thereof;
Fig. 3 is an end View;
Fig. 4 is a fragmentary sectional view through
one of the training rolls and its mountings;
Fig. 5 is a sectional view of- one of the guide
rolls; and
.
vated stops I9 and ZI projecting upwardly from
the standard base I l, as will be apparent from
Fig. 3.
>
20
All of the rolls 8, 9, and II are freely'rotatable
so as to offer no resistance to the travel of the
belt supported and guided thereby. While these
rolls maybe supported in any suitable manner,
we have shown in Fig. 4 for illustrative purposes
the mountings for two of the rolls. From this
?gure it will be observed that a stub shaft 22 is
centrally supported in the stationary standard
I3 and secured against displacement by a pin
or bolt 23. The ‘ends of this shaft, which are 30'
substantially ball shaped, project into cup-shaped
socket members 216 each forming the inner race
way of a ball bearing 25, the outer raceway of
which is formed by a ring 26 seated in the‘ hub
21 of the roll. Since the inner race member 24 35
is capable of limited oscillatory movement upon
the stub shaft 22, it will be manifest that the
training roll II may be oscillated a limited
amount about the stub shaft ball end as the cen
ter of oscillation.
V
40
The outer end of each training roll is supported
through a similar socket member .28 and ball
bearing upon the inner end of a stub shaft 29
which is ?xedly held by a bolt 3i in the upper end
of the standard I5. As this standard is swung 45
Fig. 6 is an enlarged fragmentary sectional
View showing the guide roll bearing.
In the drawings, the numeral ‘I designates a
belt, shown as a troughed conveyer belt, which
travels in the direction indicated by the arrow in
Fig. 1, and is supported and trained by the illus
40 trative idler embodying our invention. Belt-sup
porting rolls of the idler are designated in the
drawings by the numerals 8, 9 and II. The end
rolls 9 and II are independently movably
mounted training rolls, which under control of
45 the traveling belt are automatically skewable in
unison to train the belt to centered position on
the idler. While these training rolls are shown
backwardly or forwardly about its pintle I8 the
outer end of the training roll'is correspondingly
arranged in inclined position, so as to serve as
moved in the direction'of travel of the belt or
troughing rolls as well as training rolls, it should
be understood that their training function is not
dependent upon having them so arranged, except
as an incident to supporting the oppositely in
clined side portions of a troughed conveyer belt,
and that the invention may be embodied in a
55 non-troughing idler or one having the rolls dis
reversely thereto, as the case may be, thereby
angling the roll with respect to the belt to cause
the belt to return to its normal path of travel.
Each of the training rolls is moved in the man
ner above indicated by a lever which is influenced
and actuated by lateral displacement of the belt
on the idler. Each of the standards I4 and I5,
2,132,053
2
as will be apparent from Figs. 1 and 4, is pro
vided on its outer face with a socket 32 for the
reception of the ball-shaped end of a lever arm 33
forming one arm of a bell crank lever which is I
fulcrumed upon an upright post 34 mounted in an
ear 35 projecting from the standard base H.
The other arm 36 of each bell crank extends for
wardly and inwardly toward the path of travel
of the belt and at its inner end is equipped with
10 a guide roll 31 disposed in proximity to the edge
of the belt when traveling in its normal path.
From Figs. 5 and 6 it will be apparent that each
of these rolls isrfreely rotatable so as to offer no
resistance to or impose any friction upon the edge
16 of the belt when it is brought into contact there
with. With this end in view each roll 31 is
mounted upon a spindle 38 rising from the lever
arm 36, the mounting being rendered frictionless
by the employment'of ball bearings, preferably
20 of the sealed type, comprising an inner race 39,
an outer race 4!, balls 42, and sealing means in
dicated generally by reference character 43.
The inner ends of the lever arms 36 are con-V
nected by a drag link 44 including a turnbuckle
25 '45 by means of which the length of the link
may be adjusted. This adjustment is provided
for the purpose of affording provision for regu
lating the normal position'of the training rolls
with respect to each other and to the belt. For
30 instance, by manipulation of this adjustment the
axes of the training rolls may be positioned'in
a common vertical plane with the supporting roll,
or cambered slightly to correspond with the cam
As the belt returns to centered position, it en
counters the guide roll of the left hand lever, thusv
reversely operating the connections to restore the ‘
training rolls to normal position. By this auto
matic and simultaneous angling of the ends of
the rolls at the sides of the belt in opposite direc
tions, the position of the belt is smoothly and ac
curately controlled, and objectionable whipping
thereof is obviated.v Since the idler is devoid‘of
springs, weights, and. other non-positive actuate 10
ing elements, the operation thereof and there
sults produced thereby are certain and positive in
character. All of the parts with which the belt
can contact are frictionless and freely rotatable
so that no frictional resistance to, or wear upon, 15
the belt can be produced.’
It will be understood that the invention is not
limited to the particular embodiment thereof
herein shown and described, and that features of
the invention may be used in different combina 20'
tions and structures embodying such combina
tions. The illustrative idler may be variously
modi?ed in details of constructionrand arrange
ment to suit different requirements and condi
tions. The invention is not intended to be lim 25
ited to a construction in which the roller support
for the traveling belt includes only one or any
intermediatev stationarily mounted roll in asso
ciation with the training rolls.
1
In the following claims, the expression ",‘inde-, 30
pendently movably mounted”~with reference to
the training rolls and outer end supports therefor
is to be understood as signifying that said rolls
ber of the nomtraining idlers of the conveyer , or supports are, independently mounted movably»;
the production of a tendency for the traveling
or individually movably mounted,’ as distin#
guished from a construction having the roll sup
belt to maintain a centered position on the idler.
The operation of an idler constructed in ac
to a supporting structure which as a wholeis 7
system, or cambered to any degree suitable for
cordance with the principles of our invention is
substantially as follows:
The guide rolls 3‘! being set a fraction of an
40
inch from the edges of the belt when properly
centered and the training rolls being slightly
porting standards carriedrby and in ?xed relation’
adapted to turn on a medial vertical pivot. With,
the illustrative structure, the training rolls are
skewed individually in unison for the training of
the belt, in contra-distinction to the swinging of
an entire supporting structure carrying the rolls.
The movable supports speci?cally shown arethe
cambered as above explained, the belt should nor
mally' travel without contacting either of the independently pivotally mounted standards l4
45
guide rolls 31. 'The tiltable standards l4 and i5 ' and I5, which exemplify independently movably
carrying‘ the outer ends of the training rolls 9 and mounted supports in the restricted sense above
indicated, though they are not left free for in
II tend to remain in their normal or erect posi
tions, under the action of the traveling belt on the dependent movement, being operatively. con
nected by the link 44 and bell-crank levers 36 to
two training rolls, due to the operative connec
50 tions between said standards provided by the le
tilt in unison in opposite directions.
vers 36 and link 44 connecting them. Should,
We
however, the belt be subjected to 'a slight lateral
displacement, bringing it into engagement with
one of the guide rolls 31, such guide roll, because
of its frictionless mounting, will peripherally par
ticipate in, the advancing movement of the belt
without imposing any friction or wear on the belt
edge. The guide roll will, however, under the in
fluence of the belt pressure, move laterally with
the belt, thereby swinging the bell crank lever so
as to angle the outer end of the training roll
toward which the belt is creeping, forwardly or,
in other'words, in the direction of travel of the
60
‘ belt.
65
This angling of the training roll will im
part a tendency to the belt to resume its normal
' position.
This tendency is augmented by the
simultaneous angling of the other training roll in
the opposite direction through the medium of the
70 drag link 44, so that if, for instance, the belt has
crept toward the right viewing Fig. 1, training
roll I I will be moved toward the dotted line posi
tion there indicated while the other training roll
9 will besimultaneously moved in the opposite.
direction toward ‘the dotted line position shown,
claim:
,
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l. A self~training idler comprising a pair of
spaced apart movably mounted supports, belt
supporting and training means disposed between
said supports and having the ends thereof carried
by said supports, means including a pair of con- '
nected levers arranged longitudinally of the belt
and associated with said supports for moving said
supports simultaneously in opposite directions 60
underrthe in?uence of the supported belt to
thereby angle both ends of said supporting and
training means relatively to said belt, and roll
ers carried by said levers normally spaced from ‘
but engageable by opposite edges of the belt for
operating said levers.
'
2. A self-training idler comprising belt sup;
porting and training means, a pair of pivotally
mounted standards by which the outer ends of
> said means are carried, a pair of levers respec
tively connected to the respective standards, said
levers being mounted uponv ?xed'fulcrums, guide.
rolls carried by said levers engageable by the
edges of the belt, and a link connecting said,
levers. '
'
j
3._ A self-training idler comprising a stationary
15' i
3
2,132,053
roll, a plurality of training rolls, and means in
cluding a guide member in proximity to the path
of travel of the belt to be guided for angling said
training rolls simultaneously in opposite direc
tions with respect to said stationary roll.
4. A self-training idler comprising a plurality
of training rolls stationarily mounted at their
inner ends and movably mounted at their outer
ends, a lever operatively connected with the outer
10’ end of each roll, a connection between said levers,
and means carried by said levers in proximity to
the normal path of travel of the belt to be guided
whereby said levers are’ actuated, upon displace
ment of said belt, to move the outer ends of said
15 rolls in opposite directions relatively to'their sta
tionary inner ends.
5. A self-training idler comprising a plurality
of training rolls, stationary supports for the in
ner ends of said rolls, movable supports for the
20 outer ends of said rolls, a lever operatively asso
ciated with each movable support, an antifric
tionally mounted roll carried by each lever in
proximity to the normal path of travel of the belt
to be guided, and a link ‘connecting said levers,
25 whereby displacement of said belt will actuate
said levers to move the outer ends of said training
rolls simultaneously in opposite directions.
6. A self-training idler comprising a stationary
roll, a plurality of training rolls, a pivoted sup
30 port for the outer end of each training roll, a
lever operatively connected to each of said sup
ports, an antifrictionally mounted roll carried by
each lever in position to be engaged by the. belt
to be guided when laterally displaced, and means
35 for causing said levers to operate in unison under
the in?uence of said belt to thereby rock said
supports in opposite directions.
7 . A self-training'idler comprising a stationary
roll, a pair of training rolls stationarily mounted
40 at their inner ends, a movable support for the
outer end of each training roll, guide rolls posi
tioned in proximity to the normal path of travel
of the belt to be guided, and means rendered op‘
erable by displacement of said guide rolls under
45 the in?uence of said belt for moving said sup
ports in opposite directions to thereby angle said
training rolls.
'
v
8. A self-training idler comprising a stationary
roll, a pair of training rolls, all of said rolls being
freely rotatable, a movable support for the outer
50 end of each training roll, a pair of rolls positioned
in proximity to the edges of a normally traveling
belt, means operable by said last-mentioned rolls
for moving said supports under the influence of
support, said ends being shiftable forwardly and
rearwardly by movement of said movably mount
ed supports,'a pair 'of levers having ?xed ful
crums adjacent to and operatively connected with
the'respective supports, said levers arranged at
opposite sides of the belt, antifrictionally mount
ed rollers carried by said levers in proximity to
and arranged transversely of the opposite edges
of the belt, whereby the lateral shifting of the
belt toward either end of said roller support will
operate the corresponding lever to shift said end
forwardly to train the belt back to centered posi
tion, and a connection between said levers where
by the forward shifting of one end of the roller
support is accompanied by a rearward shifting
of the other end thereof.
12. A self-training idler comprising a rollersup
port for a traveling belt, independently mountedv
tiltable standards supporting the ends of said
roller support, said standards being tiltable for
wardly and rearwardly from their normal posi
tion, and means operated by the belt comprising
a pair'of connected levers forxoperating said
standards to tilt them in opposite directions, the
shifting of the belt from centered position toward . 25
either end. of said roller support operating said
means in a manner to shift forwardly said end
and to shift rearwardly the other end of said
support.
>
13. A self-training idler comprising a roller sup
port for a traveling belt, independently mounted
tiltable standards supporting the ends of said
roller support, said standards being tiltable for
wardly and rearwardly from their normal posi~
tion, a pair of levers operatively connected with
said standards, rollers carried by said levers en
gageable by the belt, one of said levers being
operable by the belt in shifting to- the right to
tilt the right hand standard forwardly, the other
of said levers being operable by the belt in shift 40
ing to the left to tilt the left hand standard for
wardly, and a link connection between said levers
whereby the forward tilting of one standard is
accompanied by'a rearward tilting of the opposite
standard.
‘ 14. A self-training idler comprising training
rolls for supporting a traveling belt at opposite
sides of its longitudinal center, ?xed supports
for the inner ends of said rolls, independently
movablymounted supports for the outer ends 50?
of said rolls, the latter supports being movable
for shifting said outer’ ends longitudinally of the
belt, said rolls being mounted in their respective
supports in a manner permitting them to be
55 said belt, and means whereby belt induced move
ment of one training roll is transmitted to the
other training roll in a reverse direction.
swung about their inner end supports in paral- .
lelism or approximate parallelism with the por
9. A self-training idler comprising a station
arily mounted supporting roll, a plurality of
60 training rolls stationarily mounted at their inner
tions of the belt traveling on said rolls, and means
operable by the belt including a pair of con
nected levers for moving said supports simulta
ends, a movable support for the outer end of each
training roll, a lever operatively connected with
each support, a guiding roll carried by each lever,
and an adjustable link connecting said levers.
10. A self-training idler comprising a station
65
arily mounted supporting roll, a plurality of
training rolls stationarily mounted at their inner
ends, a movable support for the outer end of each
training roll, means for positively limiting the
movements of said supports, a lever operatively
70 connected with each support, a guiding roll car
ried by each lever, and an adjustable link con
necting said levers.
11. A self-training idler comprising a roller sup
port for a traveling belt, independently movably
75 mounted supports carrying the ends of said roller
neously in opposite directions, the shifting of
the belt from centered position toward either end
of the idler causing operation of said means in
a manner to shift the corresponding movable
support‘ forwardly.
15. A self-training idler comprising training 65
rolls for supporting a traveling belt at opposite
sides of its longitudinal center, ?xed supports for
the inner ends of said rolls, independently mov
ably mounted supports for the outer ends of said
rolls, the latter supports being movable for shift 70
ing said outer ends longitudinally of the belt, said
rolls being mounted in their respective supports
in a manner permitting them to be swung about
their inner end supports in parallelism or approx
imate parallelism with the portions of the belt 75
4-
.
2,132,053
of ' its longitudinal center, tiltable supporting
traveling on said ‘rolls, bell-crank levers having.
arms ,operatively connected with said movable
supports and forwardly extending arms, and
' rollers carried by said forwardly extending arms
beside and transversely of the edges of the belt,
whereby the shifting of the belt from centered
position toward either end'of the idler will oper
ate the corresponding bell-crank lever to move
the corresponding support forwardly.
10'
,
16. A self-training idler having antifrictionally
standards for the outer ends of said rolls, said
standards being independently pivotally mounted
below the roll axes for tilting movement trans
versely of said axes, the rolls being supported by 5
said standards and at their inner ends in a
manner permitting them to'be skewed by the
tilting of said standards, devices connected with g
the respective standards and respectively operable
by the ‘belt for tilting said standards forwardly,
mounted training rolls for supporting a travel- . each device being operated upon lateral displace
ing belt at opposite sides of its longitudinal cen
ment of the belt from centered position in a di
mounted to permit them to be skewed, means
rection toward the corresponding outer roll end,
and ‘connecting means whereby operation of
15 away from said rolls in guiding relationship with
the belt and shiftable by and with the belt as
of the other and backward tilting of the standard
ter, said rolls being independently movably
the lattershifts laterally in either direction, said
means comprising antifrictionally mounted roller
means and being contactable by the belt without
20
imposition of appreciable frictional drag, and
shiftable devices for the respective training rolls
operatively connected for shifting in unison in
opposite directions, said devices being operable
by the lateral shifting of said means, the ar~
25 rangement being such that the shifting of the
belt from centered position causes a skewing of
the training rolls in a manner to train the belt
back to centered position.
'
.
l7. A self-trainingridler having training rolls
for supporting a traveling'belt at opposite sides
of its longitudinal center, tiltable supporting
standards for the, outer ends of said rolls, said
standards being‘independently pivotally mounted
below the roll axes for tilting‘ movement trans
35 versely of said axes, the rolls being supported by
said standards and» at their inner ‘ends in a
manner permitting them to be skewed by the
tilting of said standards, means connecting said
standards whereby movement of either standard
40 is transmitted to the other in a reverse direction,
so that under the action of the traveling belt on
the two training rolls the standards are normally
maintained in erect position, and means whereby
said standards are controlled by the belt to tilt
45 in response to lateral shifting of the belt from
centered position, the standard for the outer roll
end toward which the belt shifts being tilted
‘forwardly.
'
,
'
.
18. A self-training idler having training rolls
50 for supporting a traveling belt at opposite sides
10V
either of said devices causes a reverse operation 15
associated therewith.
‘ .
19. A self-training idler having training rolls
for supporting a traveling belt at opposite sides
of its longitudinal center, tiltable supporting 20'
standards for the outer ends of said rolls, said
standards being independently pivotally mounted , '
below the roll axes for tilting movement trans
versely of said axes, the rolls being supported by
said standards and at their inner ends in a man
25
ner permitting them to be skewedby the tilting
of said standards, and operative connections by
which said standards are movable in unison in
opposite directions, said connections being opera
ble by lateral shift of the belt in either direction 30;
and being arranged to tilt forwardly the standard
for the outer roll end toward which the belt
shifts.
,
'
20. A self-training idler having training rolls
for supporting a traveling belt at opposite sides
35
of . its longitudinal center, tiltable supporting
standards for the outer ends of said rolls, said
standards being independently'pivotally mounted
below the roll axes for'tilting movement trans:
versely of said axes, the rolls being supported 40
by said standards and at their inner ends in a
manner permitting them to be skewed by the
tilting of said standards, and means comprising
a pair of connected levers by which said stand
ards are operatively connected to‘tilt in unison 45
in opposite directions, said levers being arranged
in association with the belt and operable by lat
eral shift of the belt in either direction.
REUEL CLEM SOLLENBERGER.
LEE 0. CARROLL.
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