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Патент USA US3048359

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Aug- 7, 1962
J. R. EDMONDS
3,048,347
COIL CRADLE ROLLS
Filed Aug- 26, 1957
2 Sheets-Sheet 1
_
INVENTOR
John R. Edmonds
ATTORNEY
Aug- 7, 1962
J. R. EDMONDS
3,048,347
COIL CRADLE ROLLS
Filed Aug. 26, 1957
2 Sheets-Sheet 2
INVENTOR
John R. Edmonds
ATTORNEY
United States
3,048,347
r.
ICC
Patented Aug. 7, 1962
1
2
3,048,347
will be readily apparent from the reading of the follow
ing description of a device constructed in accordance with
the invention, and reference to the accompaying draw
COIL CRADLE ROLLS
John R. Edmonds, Dallas, Tex., assignor to Rowe Ma
chinery & Mfg. (30., Inc., Dallas, Tex., a corporation
of Texas
Filed Aug. 26, 1957, Ser. No. 680,233
8 Claims. (Cl. 242—78.7)
This invention relates to strip uncoiler cradles and
more particularly to driver rollers for strip uncoiler
cradles and to machines provided with such driver rollers
for uncoiling metal strip stock for feeding such metal
ings thereof, wherein:
In the drawing, FIGURE 1 is a perspective view, partly
cut away, of a strip uncoiler cradle provided with driver
rollers in accordance with the invention;
FIGURE 2 is a plan view, with some parts broken
away, of a driver roller of the strip uncoiler cradle shown
in FIGURE 1;
‘FIGURE 3 is a sectional view taken on line 3-—3 of
FIGURE 2;
strip material to metal working machines such as punch
FIGURE 4 is a diagrammatic sketch showing the man
ner in which a conventional roller causes loosening of
presses and the like.
An object of the invention‘ is to provide new and im 15 the convolutions of a coil;
FIGURE 5 is a perspective view, with some parts
proved driver rollers for supporting and rotating coils
broken away, of a modi?ed form of the cradle; and,
or rolls of metal strip stock in order to uncoil the strip
stock from such coils or rolls.
Another object is to provide driver rollers, of the type
described above, which are adapted to prevent the rolls
or coils from developing slack in the outer layers of the
- FIGURE 6 is a sectional view of a modi?ed form of
the driver roller shown in FIGURE 2.
Referring now particularly to FIGURE 1 of the draw
ing, the strip uncoiler cradle 10 is identical, except for
the driver rollers 11 and 12, in construction with the
strip uncoiler cradle illustrated and described in the
Still another object is to provide driver rollers, of the
patent to Rowe, No. 2,692,737, issued October 26, 1954.
type described above, having a non-circular rigid core
covered by a resilient substance whereby the formation 25 The strip uncoiler cradles includes a base comprising a
pair of spaced upright side frame plates 13 and 14 which
of slack is prevented in the outer layers of a coil supported
are connected together and held in substantially parallel
on the driver rollers.
coils or rolls as the latter are rotated.
A further object of the invention is to provide a driver
spaced relationship by an upper rear spacer bolt 14a, a
lower rear spacer bolt 15 and a lower front spacer bolt
roller, of the type described above, which is circular in
cross-section and is provided with a rigid interal longitudi 30 16. The upper front portions of vthe plates are cut away
along a diagonal incline to provide access to a coil S
nal core which is polygonal in cross-section covered by
a resilient substance.
of metal strip supported on the cradle.
'
tions whereby formation of slack is prevented in the
ends suitably supported in bearings 18 carried by the
The rear driver roller '11 extends transversely of the
A still further object is to provide a driver roller, of
lower central portion of the side plates and has its ends
the type described above, having means for imparting
periodic jars on vibrations to the coil it supports and 35 suitably supported in bearings '17 carried by said side
plates while the front driver roller 12 extends transversely
rotates whereby the outer convolutions of the coil tend
of the lower front portion of the side plates and ‘has its
to be rotated at a greater speed than the inner convolu
‘side plates. A pair of auxiliary supporting and driver
outer convolutions of the coil as the coil is rotated.
40 rollers ‘19 and 20 also extend transversely of the side
Another object of the invention is to provide a strip un
plates in uniformly spaced relationship between the rear
coiler cradle having a pair of driver rollers for supporting
and front driver rollers 11 and 12, respectively, and are
and rotating a coil of metal strip or the like which prevent
journalled at their ends in suitable bearings 21 and 22
formation of slack in the outer convolutions of the coil.
Still another object is to provide a strip uncoiler cradle, 45 in the side plates. These auxiliary rollers are positioned
below the line of centers of the front and rear driver
of the type described above, wherein the driver rollers
rollers to support and drive small diameter coils of strip
are substantially circular in cross-section and are provided
and also serve to prevent large heavy coils from contacting
with non-circular rigid core over which extends a resilient
the
?oor or the like in the space between the rear and
sheath.
A still further object is to provide a strip uncoiler 50 front driver rollers 11 and 12.
The rear and front driver rollers 11 and '12 ac secured
cradle having driver rollers for supporting and rotating
to
driver sprockets 23 and 24, respectively adjacent the
a coil of metal strip or the like wherein the driver rollers
ends near the side plate 14, as clearly shown in FIGURES
are adapted to impart periodic jars of vibrations to the
l, and an endless roller chain 25 connect the sprockets
coil as the latter is rotated thereby to prevent formation
of slack in the outer convolutions of the coil.
Another object is to provide a driver roller, of the
with each other and with a driver sprocket 26 mounted
on a drive shaft 27 carried by ‘the side plates'near their
rear edges. The drive shaft 27 is rotated by an electric
motor 28 having a drive pulley 29 which is connected
by an endless belt 30 with a drive pulley ‘31 mounted on
the drive shaft. The auxiliary rollers 19 and 20 also
type described, which is provided with a resilient sheath
which prevents marring of the strip supported on and
driven thereby.
Still another object is ‘to provide a driver roller having 60
have drive sprocket gears (not shown), secured to such
a rigid longitudinal core, polygonal in cross-section which
auxiliary rollers adjacent their ends near the side plate
is covered by a resilient sheath having longitudinal grooves
14 and in a common plane with the sprockets 23 and 24
aligned with the ‘longitudinal ?ats of the polygonal core.
of the front and rear driver rollers as is fully explained in
Additional objects and advantages of the invention
3,048,347’
3
the patent to Rowe No. 2,692,737.
4
Thus the electric
66 and 67 which are receivable in the bearing 17 or 18
motor 28 will turn the drive shaft 27 and the drive
sprocket 26 mounted thereon which, through the endless
carried by the side plates of the cradle.
The hexagonal shape of the core 60 provides a plural
chain 25, drives both the front and rear driver and sup
porting rollers 11 and 12 and the auxiliary rollers 19 and
20 to rotate the coil S which is supported peripherally
on the driver rollers.
convolutions of the coil to be periodically supported on
these sharp corners, the sheath 61 being thinner at the
ity of sharp corners or ridge portions 68 which cause the
corners, so that the outer convolution is actually slipped
relative to the next inner adjacent convolution if any
and 20 is so proportioned to the size of the gear sprockets
slack is present to cause the coil to tighten.
23 and 24 that the peripheral speed of the respective roll 10
The thicker portions of the sheath 61 between the
ers is substantially the same.
points 68 and aligned with the ?ats or longitudinal ?at
For supporting and positioning the coil of metal strip
surfaces 69 of the core, also tend to trap any slack in
within the cradle and on the driver rollers, an upright
the coil as it is developed and force it out over the roller
The size of the sprockets of the auxiliary rollers 19
laterally adjustable supporting plate 36 is movably posi
thus preventing development of slack.
tioned between the side frame plates 13 and 14. The ad
The resilient sheath of course prevents direct contact
of the rigid hard core 60 of the driver roller with the
coil of strip so that no scratching or marring of the
strip by the driver roller can occur.
justable supporting plate is movable between the side
frame plates 13 and 14 by means of an upper cross feed
screw 37, a lower rear cross feed screw 38, and a lower
front cross feed screw, not shown, which are intercon
It will be seen now that a new and improved strip un~
nected for simultaneous rotation by an endless sprocket
chain 41 as is fully described in said patent to Rowe,
No. 2, 692,737.
coiler cradle has been illustrated and described which
includes a pair of upright side frame plates 13 and 14
and a plurality of driver rollers 11, 12, 19 and 20 ex
Control of the uncoiling operation is accomplished by
tending between and carried by the side frame plates.
controlling the operation of an electric motor 28 which
drives the driver rollers for rotating the coil carried by
the cradle. The operation of the lever mechanism L
which is moved in response to the size of the outer loop
42 of a strip material unwinding from the coil S and the
switch activated thereby is also fully explained in the
patent to Rowe, No. 2,692,737.
It will also be apparent that the driver rollers are rotated
simultaneously, by an electric motor 28, to rotate a coil
of strip adapted to be supported on the driver roller.
It will also be apparent that at least the front and rear
driver rollers 11 and 12 have non-circular rigid or hard
cores 60 over which are disposed resilient sheaths 61,
which impart a circular cross-sectional shape to the com
It is found that, when conventional driver rollers are
plete driver roller, in order to prevent formation of
employed in place of the driver rollers 11 and 12, slack
slack in the convolutions of a coil supported on and
driven by the driver roller. It will also be apparent that
the driver rollers 11 and 12 are provided with retainer
in the outer layers or convolutions of the coils. This
collars at each end to prevent longitudinal slippage or
slack increases as the coil is further rotated and produces
a consequent undesirable increase in the size and loose
extrusion of the sheath 61 relative to the core.
ness of the coil. The slack is caused by slipping between
In FIGURE 5 is illustrated a modi?ed form of cradle
70 which is especially adapted to use with coils of width
the outer convolution 50 (FIGURE 4) and the adjacent
su?iciently great to afford stable positioning thereof on
upper or inner convolution 51 due to the fact that the
upper or inner convolution is being driven at a slightly 40 the driver rollers thus obviating use of positioning and
guiding plates such as the plates 14 and 36 of the cradle
faster rate than the outer convolution. This difference
10. The cradle 70 includes a channel shaped base 71
in driving rate is in turn caused, as is shown in an exag
having a horizontal web 71a and vertical side ?anges 72
gerated manner in FIGURE 4, by the fact that the con
ventional driver roller 52 imbeds in the coil causing the
and 73. A pair of driver rollers 75 and 76, identical
convolutions to are or bend around the upper surface of
in construction with the driver rollers 11 and 12 of the
the driver roller as at 53 and consequently the peripheral
strip uncoiled cradle 10, are rotatably supported on the
speed of movement of the driver roller abutting the
side ?anges 72 and 73 by means of bearings 77 in which
outer convolution is less than the effective speed of
the ends of the driver rollers are journalled. The driver
movement of the convex area 54 of the outer convolution
rollers 75 and 76 are provided with sprockets 78 and 79,
50 respectively, secured to the driver rollers adjacent the
where it abuts the adjacent inner convolution.
The driver rollers 11 and 12 of the invention prevent
ends near the side ?ange 72; and an endless chain 80
such slippage between the convolutions of a coil sup
connects the sprockets with each other and with a driver
ported on and driven thereby. The driver rollers 11 and
sprocket 81 mounted on the drive shaft 82 of an elec
12 are each provided with a rigid nondresilient core 60
tric motor 83. The electric motor 83 is mounted in the
having a cross-sectional shape which is hexagonal but 55 web 71a of the base 71.
which could be any shape other than circular which will
It will be seen that a coil of strip of relatively great
provide in effect a longitudinally serrated or ribbed roller
width may be supported on and rotated by the driver
for trapping portions of the outer convolutions of the
rollers 75 and 76 to uncoil the strip. The motor 83
coil supported on and driven by the rollers between such
causes the driver rollers to rotate through the action of
longitudinal projections or ribs to produce the desired
the chain 80 and the sprockets engaged thereby. The
slipping tightening movement of the outer convolutions
operation of the electric motor may be controlled by a
of the coil to maintain the same in tightly wound con
suitable switch (not shown) or by a lever mechanism
dition on the coil, the resilient sheath permitting such
and switch such as is illustrated and described in said
trapping and sliding movement of such portions of the
patent to Rowe, No. 2,692,737.
coil as it is unwound. A sleeve or sheath 61 of rubber
In FIGURE 6 is illustrated a modi?ed form of the
or other resilient substance is disposed about the hexag
driver roller shown in FIGURE 2 wherein the rigid non
onal roller so that the cross-sectional peripheral shape
resilient polygonal core 60 of the driver roller 90 has
of the complete driver roller is circular. The sheath is
disposed about it a resilient sheath ‘)1. The sheath 91
molded or otherwise formed in such a manner that the
is molded or otherwise formed in such manner that the
shape of its bore corresponds to that of the core. The 70 shape of its bore corresponds to that of the core while
sheath 61 is prevented from sliding off or being extruded
its outer surface is substantially circular in cross~section.
otf the core 60 by a pair of retainer collars 62 and 63
The outer surface of the sheath 91 is provided with a
which are shrunk ?tted on the reduced annular surfaces
plurality of longitudinal grooves 92 which are aligned
64 and 65, respectively, of the core 60. The core is
with the longitudinal ?at surfaces 69‘ of the core. The
is produced at the rear, or left as seen in FIGURE 1,
further provided with a pair of reduced bearing journals
grooves 92 are of a width A no greater than that of the
3,648,347
.
5
_
_
.
?at surfaces 69 of the core. It has also been found de
sirable that the width A of the grooves be as great or
greater than the width B of the outer-longitudinal curved
surfaces, 93 of the sheath 91.' The driver roller 90 func
tions in the same manner as the driver rollers 11 and 12
but provision of the grooves 92 in the resilient sheath
disposed about ‘the non-circular rigid core increases the
slack trapping effect of the driver roller and thus in—
creases the effectiveness of the driver roller in prevent
ing development of slack in the convolutions of a coil 10
supported thereon and rotated thereby.
The foregoing description of the invention is explana
_
6
rotates and maintain the coil in a tightly wound condi
tion, said sheath having a circular peripheral surface said
ridge portions being more than four in number and being
spaced peripherally of the core relative to one another.
4. A cradle for supporting and rotating a coil of strip
material for maintaining the outer convolutions of the
coil in_a tightly wound condition while uncoiling said
strip, said cradle including: a base, a plurality of driver
rollers rotatably carried by said base for supporting and
rotating a coil of strip, and means for rotating said driver
rollers, at least one of said driver rollers having a rigid
core non-circular in cross-sectional shape and a resilient
sheath disposed about said core, said core being poly
tory only, and changes in the details of the construction
gonal in cross-sectional shape ‘and providing a plurality
illustrated may be made by those skilled in the art, within
the scope of the appended claims, without departing from 15 of longitudinally extending substantially uniformly spaced
ridge portions extending further from the longitudinal
the spirit of the invention.
axis of the core than the portions of said core between
What is claimed and desired to be secured by Letters
said ridge portions, said ridge portions providing for
Patent is:
supporting the coil of strip being rotated on the rollers
l. A cradle for supporting and rotating a coil of strip
material for maintaining the outer convolutions of the 20 to permit the adjacent portion of the outer convolutions
of the coil to ?ex in the lesser projecting portions of the
coil in a tightly wound condition while uncoiling said
core between the ridges to trap the slack portion of the
strip, said cradle including: a pair of side frame plates,
outer convolution between adjacent ridges as the coil
a plurality of driver rollers extending between and rotata
rotates and maintain the coil in a tightly wound condi
bly carried by said side frame plates for supporting and
rotating a coil of strip, and means for rotating said driver 25 tion, said rigid core being provided with externally
extending retainer means at opposite ends of said
rollers, at least one of said driver rollers having a rigid
sheath to prevent longitudinal movement thereof on the
core non-circular in cross-sectional shape and having
core said ridge portions being more than four in number
more than four circumferentially spaced longitudinally
and being spaced peripherally of the core relative to one
extending sharp corners spaced peripherally of the core
relative to one another and a resilient sheath disposed 30 another.
5. A cradle for supporting and rotating a coil of strip
about said core, said noncircular core providing for trap
material for uncoiling said strip, said cradle including:
ping portions of the outer convolutions of the coil sup—
a pair of side frame plates; a plurality of driver rollers
ported on and driven by the rollers to maintain the same
extending between and rotatably carried by said side
in a tightly wound condition on the coil, said resilient
sheath permitting such trapping of such portions of the 35 frame plates for supporting and rotating a coil of strip;
and means for rotating said driver rollers, the rearmost
coil.
and foremost of said driver rollers having a rigid core
2. A cradle for supporting and rotating a coil of strip
non-circular in cross-sectional shape and having longitu
material for maintaining the outer convolutions of the
dinally extending external ?at surfaces exceeding four
coil in a tightly wound condition while uncoiling said
in number and a resilient sheath disposed about said
strip, said cradle including: a pair of side frame plates,
core,
the noncircular cross-sectional shape of the core
a plurality of driver rollers extending between and rotata
bly carried by said side frame plates for supporting and
rotating a coil of strip, and means for rotating said driver
rollers, at least one of said driver rollers having a rigid
core non-circular in cross-sectional shape and having
more than four circumferentially spaced longitudinally
extending sharp corners spaced peripherally of the core
relative to one ‘another and a resilient sheath disposed
about said core, said noncircular core providing for trap
ping portions of the outer convolutions of the coil sup
ported on and driven by the rollers to maintain the same
in a tightly wound condition on the coil, said resilient
sheath permitting such trapping of such portions of the
coil, said rigid core being provided with externally ex
tending retainer means at opposite ends of said sheath
to provent longitudinal movement thereof on the core.
3. A cradle for supporting and rotating a coil of strip
material for maintaining the outer convolutions of the
coil in a tightly Wound condition while uncoiling said
strip, said cradle including: a base, a plurality of driver
rollers rotatably carried by said base for supporting and
rotating a coil of strip, and means for rotating said driver
rollers, at least one of said driver rollers having a rigid
core non-circular in cross-sectional shape and a resilient
sheath disposed about said core, said core being polygonal
in cross-sectional shape and providing a plurality of
longitudinally extending substantially uniformly spaced
ridge portions extending further from the longitudinal
axis of the core than the portions of said core between
and the resilient sheath providing for maintaining the
outer convolutions of the coil supported on said driver
rollers in a tightly wound condition.
6. A cradle for supporting and rotating a coil of strip
material for uncoiling said strip and having means therein
for maintaining the convolutions of the coiled strip in a
tightly wound condition during such uncoiling rotation
of said coil, said cradle including: a base; a plurality of
driver rollers rotatably mounted on the said base for sup
porting and rotating said coil of strip, said driver rollers
being rotatable about spaced parallel horizontal axes;
and means for rotating said driver rollers; said means
for maintaining said coil of strip material in a tightly
wound condition during such uncoiling rotation thereof
on the driver rollers comprising: at least one of said
driver rollers having a rigid core formed with a plurality
of substantially uniformly circumferentially spaced lon
gitudinally extending ?at surfaces on its exterior provid
ing a plurality of substantially uniformly circumferential
ly spaced projecting rib-like portions and lesser project
ing ?at areas exceeding four in number between said rib
like projections, and a resilient sheath secured to the
exterior of said core and providing a substantially cylin
drical external peripheral shape; said rib-like projecting
portions of said rigid core supporting the portion of the
coil engaging said driver roll to permit accumulation of
slack between each of such projecting portion and the
next successive adjacent circumferentially spaced project
said ridge portions, said ridge portions providing for 70 ing portion to maintain said coil in a tightly wound con
supporting the coil of strip being rotated on the rollers
dition, said resilient sheath permitting such accumulation
to permit the adjacent portion of the outer convolutions
of slack between projecting portions of the core and
of the coil to ?ex in the lesser projecting portions of the
preventing scar-ring the external surface of the coil.
core between the ridges to trap the slack portion of the
outer convolution between adjacent ridges as the coil 75 7. A device of the character set forth in claim 6,
3,048,347
I
I
wherein the resilient sheath on the core of the driver
roller is provided with a plurality of circumferentially
spaced longitudinally extending grooves in its peripheral
surface, each of said grooves being radially aligned with
one of the ?at surfaces of the core, said grooves provid
ing for accommodating additional ?exing of the outer
convolutions of the coil of strip between the rib-like
projections of the core of the driver roller.
8. A device of the character set forth in claim 7,
wherein the grooves formed in the outer peripheral of 10
the resilient sheath of the driver roller have a width not
References Cited in the ?le of this patent
UNITED STATES PATENTS
103,416
996,970
1,534,559
1,938,444
2,058,243
2,247,874
2,610,633
Bird et a1 _____________ __ May 24, 1870
Burnham _‘.__‘ __________ __ July 4, 1911
Yant ________________ _- Apr. 21, 1925
Vedder ______________ __. Dec. 5, 1933
Lippincott et a1 ________ .._ Oct. 20,
Crites ________________ __ July 1,
Joswik ______________ __ Sept. 16,
Erhardt ______________ __ Dec. 16,
1936
1941
1952.
1952
greater than the width of the corresponding underlying
2,621,652
2,692,737
2,715,879
Sawyer ______________ __ Aug. 23, 1955
?at surface of the core.
2,804,678
Rocko? ______________ __. Sept. 3, 1957
Rowe ________________ __- Oct. 26, 1954
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