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Патент USA US3086818

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April 23, 1963
_ L. G. KAPLAN
3,086,808
LEG ASSEMBLY FOR COIL LIFTERS
2 Sheets-Sheet 1
Filed Nov. 3, 1960
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132
34
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INVENTQR
Louls G. APLAN
April 23, 1963
|_. G. KAPLAN
3,086,308
LEG ASSEMBLY FOR COIL LIF‘TEIRS>
Filed Nov. 5, 1960
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2 Sheets-Shea?I 2
WW1 54A
80
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3,685,808
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Patented Apr. 23, 1963
2
in the yabove-mentioned Hooker et al. patent are incapable.
3,086,898
Louis G. Kaplan, Evanston, El., assigner to Cullen
_
LEG ASSEMBLY FÜR COÍLL LETTERS
Friestedt Company, Chicago, El., a corporation of
Illinois
Filed Nov. 3, 196i?, Ser. No. 67,594
4 Claims. (Cl. 294-67)
of performing the necessary functions for pallet-loading
and transporting operations, especially where aisle space
is limited. Movement of the jaws, when set for coil-lift
ing purposes to a position wherein they are sufficiently
spaced apart to permit straddling of a coil length-wise of
the coil, will frequently be prevented by interference with
an adjacent coil on the opposite side of 'an aisle from the
coil to be lifted. Even when aisle space presents no prob
The present invention relates generally to sheet and
coil litters of the type which are employed for lifting, 10 lem, the full effective length of the coil-engaging lingers
associated with the lifter jaws is not »available for coil
moving, transporting 4or otherwise handling relatively
lifting purposes due to the interference offered by the sheet
heavy stacks of flat sheet metal stock or, alternatively,
or pallet-lifting flanges of the jaws.
relatively massive involute sheet metal coils. Such -lifters
The present invention is designed as an improvement
are commonly employed at the steel mill for loading pur
over the dual purpose lifter of the Hooker et al. patent and
over other similar litters -in that it is designed to over
come the above-noted limitation that is attendant upon
purposes.
the use of such lifters. Lifters embodying the leg con
Lifters `of the character with which the present inven
struction of the present invention are able to place »sheet
tion is concerned conventionally are comprised of two
series of jointed leg assemblies which are hinged at their 20 metal coils on 1pallets and to transport the pallets to remote
locations -at a scene `of operation where -ñoor space is
upper ends to the opposite sides of a supporting structure.
extremely limited so that the coil aisles are necessarily
In the case of a sheet lifter, the lower ends of the arms
poses and at consumer locations where the sheets or
coils are distributed throughout the plant for fabrication
carry angle irons which have opposed inwardly projecting
narrow. Furthermore, llitters having the present leg con
struction may also be employed for either sheet or coil
flanges adapted to engage under a ystack of sheets for sup
porting it. "ln the case :of a coil lifter, the lower ends of 25 lifting purposes, as well `as for a wide variety of other
uses hitherto incapable of being performed by conven
the arms carry opposed inwardly projecting lingers adapted
to enter the opposite ends yof the central bore in the spool
tional litters.
While in the accompanying drawings and throughout
like structure. The Asupporting structure carries means
for closing and opening the jaws afforded by the opposed
this speciñcation the improved lifter leg construction of
relatively movable leg structures to thus engage and dis 30 the present invention has been disclosed and described in
connection with -a lifter construction of the swinging jaw
engage the load. The entire lifter mechanism is adapted
type as outlined above, it is to be distinctly understood that
to be suspended bodily from an overhead hoist or crane.
Lifters `of the character brieiiy outlined above may be
the invention may, with or without suitable modification,
be adapted for use in connection with lifters of the type
provided with leg constructions specilically designed for
handling stacks of sheet metal or they may be designed 35 which employ telescopic jaws which are horizontally slid
»able or otherwise movable toward and away from each
for handling sheet lmetal coils. Leg constructions for lift
lother for sheet or coil-engaging purposes. irrespective
ers have also been designed which will handle both types
however of ‘the particular type of lifter assembly with
of loads as evidenced by the patent to Hooker et al., No.
which the present leg or jaw construction may be associ
2,841,434, dated July l, 1958, for Auxiliary Coil Lifting
Devices for the laws of a Sheet Lifter. Dual purpose 40 ated, the essential features of the invention are at all times
preserved.
lifters of the character disclosed in the Hooker et al.
The provision of a dual purpose lifter leg construction
patent are possessed of certain limitations in use and the
which will accomplish the aims outlined above being
present invention is designed as an improvement over the
among the principal objects of the present invention, it is
lifter disclosed in such patent in »that it affords a dual leg
construction for such litters which not only will handle 45 a further and more specific object to provide a lifter leg
assembly which is entirely self-contained, which is to say
both sheets and coils in a manner more eiñciently than`
that it may be converted from its coil-handling to its
has heretofore been possible, but which also will ex
pallet or sheet-handling condition and vice versa without
tend the usefulness of lifters of this type and enable the'
requiring the addition, 'subtraction or interchange of parts,
same to perform services which cannot be performed by
and without requiring the use of tools.
present day lifters including the lifter shown in `the Hooker
Another object of the invention in a lifter leg construc
et al. patent.
tion of this sort is to provide a novel form of retractible
Situations frequently arise in connection with the han
coil-engaging finger, as well as a retractible sheet or
dling of coils wherein it is necessary to pick up a series
pallet-engaging nange, both of which may, by proper
of horizontally disposed coils which are arranged on the
iloor in rows of axially aligned, spaced coils providing 55 manipulation of the hoisting crane and lifter mechanism,
be caused to become retracted automatically without
aisles within which Ithe jaw legs may operate in moving
requiring the attention of an auxiliary operator. Auto
into coil-engaging positions, to place the coils on plat
matic retraction ofthe sheet or pallet-engaging ñange may
forms or pallets, and then pick up the coil-loaded pallets
be effected while bringing the lifter into operative coil
for transportation to a remote location. In situations of
this character, two problems are involved. In the first 60 engaging position, while automatic retraction of the coil
engaging ringer may be effected while working in close
place, it frequently happens that where floor space is
quarters to enable a coil to be engaged without inter
limited, the aisles cannot be made wide enough to accom
ference by adjacent coils. Automatic retraction of the
modate proper movement of the lifter jaw legs so that the'
coil-engaging linger may also be effected for coil-releasing
coil-engaging lingers may be caused to enter 'the coil bores
at the ropposite ends of the coils. Secondly, a lifter which 65 purposes as will be described in detail presently.
The provision of a lifter leg construction which is
will accommodate the hoisting of a coil has -no provision
capable of being manufactured as original equipment in
for hoisting a coil-loaded pallet so that the job must be
connection with a given lifter assembly, or which alterna
performed using first a lifter having coil-lifting jaws so
tively may be applied to existing lifter assemblies of either
that the coils may be loaded on the pallet and then using
the swinging jaw or telescopic jaw type; one which is com
a second lifter having pallet-lifting jaws so that the coil
prised of a minimum number of parts, particularly moving
ladened pallet may be lifted and transported to the re
parts, and which therefore is unlikely to get out of order;
mote location. Lifters of the type shown and described
3,086,808
3
one `which -is rugged and durable and which therefore
will withstand rough usage; and one which otherwise is
well adapted to perform the services required of it, are
further desirable features which have lbeen borne in
mind in the production and development Vof the present
invention.
With-these-and other-objects in view which will become
readily apparentes the following description ensues, the
invention yconsists of the novel construction, combination
andíarrang'emen-t of parts'shown in the accompanying two
sheets Aof vdrawings forming a part of this specification.
l'nthese- drawings:
:FIG >1 is` anïend elevational view, somewhat schematic
in >its representation, of a lifter assembly embodying the
leg construction of the .present invention;
FIG.
View of
FIG.
the‘li'ne
FIG.
the line
FIG.
d.
be operated in any suitable manner, either by a hand
wheel operating through a suitable gear reduction device,
or by an electric motor similarly and operatively con
nected thereto.
The two leg assemblies which form the subject matter
of the present invention are substantially identical in their
design and construction and therefore a description of
the assembly 32 will suffice for the assembly 3‘4. The
assembly 32 involves in its general organization an elon
gated open frame-like structure including spaced apart
side plates 54 and 56 connected together and maintained
in their spaced relationship by means of transverse bars
58 and 60 (FIG. 2) as well as by the pins Y26 and 28
which have associated therewith bushings 62 and spacer
sleeves 64 extending between the plates 54 and-56. Ad
ditional plates 66 and `68 are welded in position along
the edges of the 'plates 54 and 56 as shown in FIGS.»3
and 6.
2 is an enlarged fragmentary side elevational
a portion of the structure shown in FIG. l;
3 Vis a sectional view taken substantially along
3-3 of FIG. 2;
At the lower end of the leg assembly 82, a pair of
4 is a sectional view taken substantially along 20 plates 78 extend horizontally outwardly from the sides
4_4 of FIG. 2;
of the plates 54 and 56 respectively and these plates are
5 is a fragmentary front elevational view of a
supported at their outer ends by means of inclined struts
portion ofthe structure shown in FIG. 3;
72. Vertical end plates '74 .project downwardly from the
FIG. 6`is a fragmentary schematic side elevational view
outer ends of the plates 70‘l and have their lower ends
illustrating-certain principles of operation made possible 25 connected -together by means of a stop plate 76, the
by the leg'construction of the present invention when put
function of which will be made clear presently.
to aspeciiic use;
Extending through the end plates 74 and through the
. FIG. 7 is a 'sectional View similar to FIG. 3 showing
plates ‘54’ and S6 and supported thereby is a horizontal
a modiñed form `of the invention; and
rock shaft 78 which may either be fixed or mounted for
FIG. 8 is an electrical circuit diagram employed inY 30 free turning movemenrt in the various plates in which it
connection with the form of the invention shown in
is supported. The rock shaft 78 has tiltably mounted
FIG. 7.
thereon three load-engaging assemblies or devices incluid
Referring now to the drawings in detail and in par
ing two identical foot members 80 adjacent the end
»ticulartoy FIG. l, there has been disclosed in this view
regions of the shaft, and a central coil-engaging linger
a lifter mechanism designated in its entirety at 16‘, and
assembly 82. The foot members S0 are disposed be
including a supporting structure 12 from the opposite
tween the end plates 74 and fthe adjacent side plates -54
sides of which there are suspended a pair of jointed jaw
or ‘56 as the case may be. The linger assembly 82 is dis
structures 14 and 16 respectively. ’lhe »two jaw structures
posed’between the two side plates 54 and 56.
1‘4`and 16 are substantially 'identical in construction, one
As best-seen in FIG. 4, each foot member-80 may as-v
being a-complement of the other, and therefore a descrip 40 sume the form of a casting including a body portion 8‘4
tion of one of these structures will suiüce for the other.
from the lower edge of which there projects laterally
The supporting ‘structure 12 carries a cross pin 17 by
in one 'direction a supporting llange 86 adapted when
means of which the entire assembly 10' may be hoisted
the jaws are closed upon each other to underlie a stack
and transported from place to place, utilizing the suspen
of flat sheet metal stock, an article-supporting pallet, or
sion'hook 19 of an overhead crane. Each jaw structure
any
other suitable load. A pair of ears 88 Vproject
14 or 16, as the case may be, involves in its general
laterally in the other direction from the-opposite ends of
organization a composite outer suspension link assembly
the body portion 84 and are provided with central bores
18 and a similar composite inner suspension link assem
96 »therethrough by means of which the foot member as
bly 20. The suspension link assembly 18 is pivoted by
a whole may tiltably be supported on the rock shaft 78.
means of a pin 22 to the 'supporting structure 12. for
swinging movement about a horizontal axis while the 50 Thebody portion 84 is formed with arcentral hole 912
suspension link assembly 2t) is similarly pivoted by means
of a pin 24 to the supporting structure at a region spaced
slightly inwards and below the axis añorded by the pin
therethrough fora purpose that will be set forth »present
ly. The foot members 80 are each independently mov
able between the operative lowered advanced position
illustrated in dotted lines in FIG. 4, and the'inoperative
22. The two link assemblies 18 and 29, which hereinafter
will be referred to simply as links, extend in parallelism 55 raised retracted position shown in full lines in this view.
In >the dotted line operative position of the foot mem
and the lower ends therefore are pivoted by vmeans of
bers Sti/„the supporting ñanges 86 extend horizontally for
pins 26 and 28 to an enlargement 30 provided at the
load-lifting purposes while the outer side of the body
upper end of a composite leg assemblyv constructed in
portion'8`4 engages the inner edge of the stop plate 76,
accordance with the principles of the present invention,
the leg assembly for the jaw structure 14 beingdesignated 60 the stop plate thus serving as a reaction abutment or
limit memberto maintain the foot member 80 in its op
at 32 and the assembly for the jaw structure 16 being
designated at 34.
Opening and closing movements-of the -jaw struc-tures
erative position.
The two foot members 80 are >inde
pendently movable between their operative and inopera
14 and 16 may be effected in various ways, either by hand
tive` positions.
or under the motivating influence of an electric tmotor. 65
Still referring 'to FIG. 4, in the full line inoperative
retracted position of the foot members 80, the support
ing flange Y86 extends vertically and the holes 92 are‘de
signed for registry with the lower ends Vof respective
latch members orpins 100 which are vertically slidable
For exemplary purposes, opening and closing movements
of the jaw structures 14 and 16 may be elfected under
the control of a horizontal rock shaft 40 mounted on the
supporting structure I2 and having associated therewith
Y
radial arms `42 and 44, the outer ends of ,which are pivoted 70 in` sleeves 102 welded to the inclined struts 72.
to spring loaded link devices 46 and 48 respectively
which, in turn, have their outer ends pivoted by means
of pins 50 and 52 .tothe medial regions of the outer links
18. The rock shaft 4t) constitutes the motivating element
of the rjaw-opening and closing mechanism and it may 75
'Ihe
latch pins 100 are normally urged toward their advancedY
lowered latching positions by means of coil springs 104
which bear’at their opposite ends against opposed shoul
dersr106 and 108 provided ,on `the .sleeves and pins re
spectively. Pin‘ and slot connections `ll‘lß'ebetween'ßthe latch
3,086,808
5
6
pins and sleeves prevent turning of the pins within the
the handling of a coil such as the coil C, the foot members
80 are moved to their retracted positions and latched in
such positions by means of the latch pins 10i) while the
sleeves.
The extreme lower end regions of the latch
pins 100 are formed with inclined cam surfaces 112
coil-engaging finger assemblies 82 are released by the
latch pins 132 nad moved to their lowered operative posi
which are engageable with the body portions 84 of the
foot member S0 as the latter approach their retracted
positions so that the latch pins may be automatically re
tracted in the usual manner of latch operation prior to
tions as shown in FIG. 3. Thereafter the lifter jaws are
brought into straddled relation with the ends of the coil
and with the finger assemblies in substantial axial align
ment with the central bore provided in the coil. There
after the jaws are closed upon each other 'and the linger
entry of the latch pins into the holes 92. Each latch pin
is provided with a manipulating handle or lever 114 by
means of which the latch pin may be manually moved to
its retracted position when desired.
Referring now to FlGS. 2, 3 and 5, the pivoted coil
engaging finger asernbly 82 may be in the form of a cast
assemblies are caused to enter the opposite ends of the
bore so that the curved saddle surfaces 122 thereof will
underlie the upper end portions of the coil. With the
saddle surfaces 122 thus positioned, upon hoisting of the
bly involving individual parts. It includes a body por
lifting assembly, the coil C will be engaged and elevated
tion 126 from the upper edge of which there projects
from the supporting surface vfor transportation toa desired
laterally in one direction a supporting finger proper 122.
location.
As best seen in FIG. 5, the upper surface of the finger
The above description of the operation of the improved
122 is curved to provide a saddle-like surface which will
lifter leg construction of the present invention is applic
accommodate the curvature of the bore provided in a 20 able in instances where ample operating space is avail
coil such as the coil C shown in FIG. 6. An inclined
able for manipulation of the lifter assembly 10 without
brace member or plate 124 extends between the body
interference from adjacent objects such as building walls,
portion 120 and the distal edge 0f the iinger 122. A pair
supporting posts or columns, machinery or other equip
of ears 126 project laterally in the other direction from
ment, or stacks of sheets or coils awaiting handling.
the opposite ends of the body portion 120 and are pro 25 Where floor space is limited, as for example where an
vided with central bores 12S therethrough by means of
aisle space is so narrow that the lifter jaws may not be
which the finger assembly as a whole may be tiltably
extended with the coil-engaging finger assemblies 82 in
supported on the rock shaft 78. The inclined plate 124
their lowered operative positions, it is possible to cause
is formed with a hole 130 therein designed for coopera
the jaw assemblies to straddle the coil with the framework
tion with a latch pin 132 similar to the latch pins 160. 30 of the leg assemblies 32 and 34 in close proximity to the
The latch pin 132 is vertically slidable in the two trans
ends of the coil by moving the coil-engaging assemblies
verse bars 58 and 60 and it is normally urged towards
82 to their inoperative latched positions. Upon lowering
its lowered advanced position by means of a coil spring
of the lifter the two assemblies 82 may be brought into
134 which bears at its upper end against the transverse
register with the open ends of the coil bore where they
bar 60 and at its lower end against an upwardly facing 35 are free to be swung inwardly into the interior of the bore
shoulder 136 provided on the latch pin 132. An up
for subsequent coil-lifting purposes.
standing post 138 is formed with a vertical slot 140
Alternatively, the distance between the leg assemblies
therein and a guide pin 142 carried by the latch pin 132
32 and 34 may be adjusted so that it is slightly greater
projects into the slot and is slidable therein. The pin and
than the axial extent of the extent of the coil while the
slot connection 140, 142 just described serves to limit 40 coil-engaging assemblies are allowed to remain in their
ing or it may be fashioned as a composite welded assem
the extreme positions of the latch pin, as well as to pre
lowered operative positions. Upon lowering the lifter 4so
vent turning movement of the latter. A manipulating
handle or lever 144 is carried by the latch pin 132 and
may be employed to withdraw the lower end of the latch
finger pin from the hole 130 and thus release the coil 45
that the two leg assemblies straddle the ends of the coil,
the inclined underneath brace plates 124 will engage the
upper rims of the coil as shown in FIG. 6 in full lines
and, upon continued lowering of the lifter, the brace plate
will effect camming engagement with the coil and cause
engaging finger assembly from its latched position. The
extreme lower end region of the latch pin 132 is formed
the coil-engaging assemblies 82 to swing upwardly toward
with an inclined cam surface 146 which is engageable
with the outer regions of the cam finger 122 as the finger
their retracted positions las shown in dotted lines in this
View. As soon as the brace plates 124 have cleared the
assembly approaches its retracted position so that the 50 rims of the coils, the coil-engaging assemblies S2 will
latch pin may be retracted automatically in the usual
fall by gravity into position within the coil -bore and
manner of latch operation immediately prior to entry of
assume the position shown in broken lines in this view.
the latch pin into the hole 13b.
If the distance between the leg `assemblies 32 and 34 be
In the operation of the lifter Eassembly 10, when it is
adjusted so that it approximates the axial of the coil, such
desired to use the lifter legs 32 and 34 in connection with 55 lowering of the leg assemblies in their straddling relation
the handling of a stack of metallic sheets, for lifting a
pallet or the like, or for engaging the side margins of any
flat sided article to be handled, the two foot assemblies 30
are caused to assume their lowered operative positions as
shown in FIG. 4 wherein the load-supporting flanges 86 60
extend horizontally and bear against the stop plate ‘76.
The rock shaft 40 is operated to cause the lifter jaws 14
and 16 to separate to such an extent that the opposed
inside edges of the flanges S6 will clear the sides of the
object to be handled. The lifter is then manipulated to
bring the leg assemblies 32 and 34 into straddled relation
relative to the load and thereafter the lifter jaws are
closed upon each other so that the body portions 34 of
the foot members 86' are brought into gripping relation
ship relative to the coil ends may cause the coil-engaging
»assemblies to automatically become latched, in which
case, after the lifter has been lowered to bring -the as
semblies into register with the open-ended coil bore, the
assemblies may be manually released by manipulation of
the levers 144.
From the above description it will be appreciated that
lifter assemblies embodying the novel leg construction of
the present invention will be found particularly useful in
65 connection with pallet loading operations Where a series
of coils, arranged in rows so as to provide clearance aisles,
kare to be loaded upon pallets and thereafter the load pal
lets are to be transported. With the coil-engaging assem
with the load with the supporting flanges 86 underlying 70 blies in their advanced positions, and with the pallet-en
gaging assemblies in their latched retracted positions, the
the side margins of the load. Finally, the lifter assembly
coils may be loaded upon the pallets by lifter manipula
may be hoisted and transported to the desired location
tions such as have previously been described. With the
after which the operation may be reversed to release the
positions of the coil and pallet-engaging assemblies rre
load.
When it is desired to utilize the lifter in connection with 75 versed, the loaded pallets may be engaged and transported.
3,086,808
sa
It will also be appreciated that, by theA use of the lifter leg
assembly of lthe present invention, adjacent rows of coils
to beïtran‘sp'orted maybe positioned closer together than
with conventional lifter leg assemblies or, in other words,
the aisles between rows may be -made appreciably nar
rower. Obviously, a saving in aisle space will'result inan
increase in the number of coils which may be set up for
so to move as the lifter continues to descend.
As soon
as the coil-engaging iinger assemblies S2 have become
latched, the lifter may be again elevated and the jaws
will clear Athe coil ends. The operation is repetitions
for the >various coils undergoing transportation without
necessitating the operator leaving his cab.
In
8 a typical electrical circuit for controlling the
operation of lthe sclenoids vfor the' individual leg assem
blies 32 and 34 are-designated at S1 and S2 respectively,
one thousand feet in length are not uncommon in large 10 each assembly including the previously described core 152
and winding 154. The dotted .line rectangle labelled C'
steel mill operations =and, since by the use of the present
represents the cab of 'an overhead crane or other hoist
lifter leg construction a 15% saving in iloor space can be
and Within which »the operator is stationed. The two
attained, the additional coils capable of being handled
solenoid windings 154 are electrically connected in paral
may well bea factor which obviates the necessity of erect
15 lel in a normally open circuit including a circuit making
ing an additional building.
transportation in a given floor larea. The saving in ñoor
space is appreciable when it is considered that door areas
'In FIG. 7 a modiñed form of latch mechanism has been
and breaking control button B and a source of current
disclosed for retaining the coil-engaging ûnger assembly
supply S. Upon depression of the control button, a cir
82 in its `latched inoperative position. In the disclosure
of FIG.V 7 the various parts of the lifter leg assembly
through lead a, the normally unbridged contacts associated
merals have been applied to the corresponding parts in
button B, leads b, f, winding 154 of the solenoid S2, and
cuit will be established from one side of the source S
remain substantially the same as in FIG. 3 except for 20 with the control button B, leads b, c, winding 154 of the
solenoid S1, and leads d and e back to the source S.
provision of solenoid-actuated latch assemblies by means
A similar circuit exists for the solenoid S2 and extends
of which the latch pins 132 may be actuated. To avoid
from the source through lead a contacts of the control
needless repetition of description, identical reference nu
FIGS. 3 and 7. The latch pin 132 in each instance re 25 leads-g and e back to the source S.
The invention is not to be limited to the exact arrange
mains substantially the same as the latch pin described in
ment of parts shown in the accompanying drawings or de
connection with the manually operable latch pin of FIG.
scribed‘in the-specification as various changes lin the details
of construction may be resorted to without'departing from
electrical failure. The upper end of the latch pin 132 30 the spirit of the invention. Therefore, only insofar as the
invention has particularly been pointed> out in the ac
is slotted as at 150 to receive the lower end of a vertically
companying claims is the same to be limited.
shiftable solenoid core or plunger 152, the latter being
Having thus described the invention what I claim as
slidable in the usual manner within the central bore of
3 and the operating handle 144 may remain associated
with the pin for use in the event of solenoid or other
a solenoid winding 154 which may be secured to a bracket
new `and desire to secure by Letters Patent is:
like may have control over the operation of the solenoid.
semblies mounted on said supporting structure for move
the twoicoil-engaging linger assemblies, the versatility of
load-engaging and load-.releasing purposes respectively,
1. In a sheet and coil lifter of the character described,
156 añixed to the plate 66. It is contemplated that the 35
a supporting structure having means associ-ated therewith
solenoid lead-in wires 160 and 162 may-extend to the
whereby it may be engaged by fan overhead hoist for
cab of the overhead crane or other hoist (not shown)
elevating and transporting purposes, fa pair of leg as
where Vthe operator by depressing a control button or the
By thus Vemploying solenoid-actu-ated latch devices for 40 ment in unison toward and away from each other for
each leg »assembly comprising lan elongated frame-like
the lifter assembly may be materially enhanced. For ex
member, a horizontal rock-shaft mounted on said mem
ample, referring again to FIG. 6, in an instance where a
ber and extending transversely to the direction of move
series of coils arranged in rows separated by aisles las
previously described are to be transported, 'the entireV 45 ment, a coil-engaging finger pivotally mounted on said
rock-'shaft Vfor 4swinging movement about the yaxis of
operation may be effected under the control of a single
the latter between an operative position wherein the
operator Yin the crane cab without necessitating his leav
finger lis projected horizontally lbeyond lthe general con
ing his station or relying upon outside assistance. With
fines of the `frame-like member and `an inoperative posi
the lifter jaws adjusted to only »a slightly greater spacing
than the length of each coil to be lifted from the floor, 50 tion >wherein the linger assumes .a vertical 'position with-in
the coníines ‘of the frame-like member, an elongated
the jaws may be brought into straddling relation with
substantially yflat supporting llange for `a stack of metallic
respect tothe coil as previously described and, as thel
sheets or the Ilike pivotally mounted ‘on said rock-shaft
jaws are caused to descend from their full line position
for vswinging movement about the axis of the latter inde
the previously described automatic latching of the coil
engaging linger assemblies occasioned by contact thereof 55 pendently of said coil-‘engaging ñnger and between »an
operative position wherein the ñange is projected hori
with the top edge of the coil C will take place. After
zontally beyond the general coniines of the frame-like
the jaws have been lowered to such an extent -that the
member and an inoperative position' wherein the ñange
coil-engaging assemblies 82 move into horizontal register
:assumes a vertical position within the confines of the
with the central bore in the coil, the operator in the cab
will release the assemblies by energizing the solenoid 60 kframe-like member, the effective length of said finger
being no greater than the effective width of the support
coils 154 and causing the latch pins 132 to be moved
ing ñange,'1=atch means ,for releasably holding said coil
upwardly, whereupon the lassemblies S2, which 'in their
engaging ñnger »in its inoperative position, latch means
inoperative positions possess a degree of unstable equi
for releasably holding said supporting flange in its in
librium, will move under 'the influence of gravity to the
broken line positions shown in IFIG. 6. Immediately 65 operative position, and means for selectively moving said
leg »assemblies toward land away yfrom each other.
thereafter the lifter may be raisedand the coil C thus
2. In a sheet and 'coil lifter of the ycharacter described,
picked -up by the lingers proper 122 for transportation to
«a supporting structure having means associated therewith
the remote location.
whereby it may be engaged by lan overhead hoist for
At the desired terminal location for the coil C the
lifter will be lowered to position the coil upon the floor, 70 elevatingl and transporting purposes, »a pair of leg assem
»blies mounted on ysaid supporting structure for movement
after which, continued lowering movement of the lifter
in unison toward and away Vfrom each other for load
Will cause the freely pivoted coil-engaging ñnger assem
engaging tand load-releasing purposes respectively, each
bly 82 to strike the bottommost inside edge of the rim
leg assembly comprising an elongated `frame-like »mem
of coil bore, whereupon the assembly will move toward
its retracted inoperative latched position and continue 75 ber, a horizontal rock-shaft mounted on said member and
3,086,808
extending transversely to the direction of movement of
the member, a coil-engaging linger pivotally mounted on
said rock-shaft -for swinging movement :about the axis
of lthe latter between an operative position wherein the
finger is projected horizontally beyond the gneral con
fines of the frame-like member and an yinoperative posi
tion wherein the finger «assumes a vertical position within
the lconfines of Ithe frame-like member, an elongated
substantially flat supporting flange for a stack of metallic
sheets or the like pivotally mounted on said rock-shaft
for swinging movement about the axis ‘of the llatter in
the leg, the effective length of said finger being no greater
than the effective width of the supporting flange and
means for selectively moving said jaws Itoward land away
from each other.
4. In a sheet and coil lifter of the character described,
«a supporting structure having means associated therewith
whereby it may be engaged by an overhead hoist 'for
elevating and transporting purposes, a pair ‘of oppositely
disposed complementari jaws -depending tfërom said support
ing structure and pivoted thereto for swinging movements
toward `and away .from each other, each jaw comprising
dependently `of said coil-engaging finger 'and between an
an elongated vertically disposed lower leg and an upper
operative position wherein the flange is projectd hori
zontally beyond the general confines of the frame-like
connecting linkage mechanism including spaced parallel
assumes a. vertical position within `the coniines of the
links pivoted to the leg and to the supporting structure
for constraining the leg to maintain its vertical disposi
tion during swinging movements of the jaws in either
frame-'like member, latch means for releasably holding
direction, a horizontal rock-shaft carried yat the lower end
said coil-engaging finger in its inoperative position, latch
means for releasably holding said supporting flange in
its inoperative position, said coil-engaging finger being
of each leg and extending transversely to the direction
of movement of the latter, a coil-engaging finger pivotalily
20 mounted on said rock-shaft ijn the medial region thereof
provided with a cam surface thereon which, when the
finger is in its horizontally projected position, ris inclined
tor swinging movement about the axis of the rock-shaft
between an operative position wherein the finger is .pro
with respect to the frame-like member, said cam surface
jected horizontally beyond the general confines of the
being adapted to make camming engagement with the
adjacent rim portion of a horizontally disposed coil when
the two leg lassemblies are disposed in close proximity
and in straddling relationship with respect to »the opposite
leg and an inoperative position wherein the finger assumes
a vertical position Within the confines of the leg, yan
elongated substantially flat supporting flange `for a stack
elevating and transporting purposes, a pair of `oppositely
than the effective width of the supporting flange, `latch
means tor releasably holding said coil-engaging linger in
member `and an inoperative position wherein the fianges
of metallic sheets or the like pivotally mounted on
said rock-shaft on each side 4of said `coil-engaging finger
ends of such coil to thus cause the coil-engaging finger
for independent swinging movement labout the `axis of the
of each leg assembly to be moved towards its retracted
position, ‘and means for selectively moving said leg as 30 rock-shaft between `an operative position wherein the
flange is projected horizontally beyond the general con
semblies toward and »away from each other.
fines `of the leg ‘and an inoperative position wherein the
3. In a sheet and coil lifter of the character described,
flange »assumes 1a vertical position within the confines of
a supporting structure having means associated therewith
the leg, the effective length of said ringer being no greater
whereby it may be engaged by ian overhead hoist for
disposed complemental jaws depending `from said sup
porting structure and pivoted thereto for swinging move
ments toward and way from each other, each jaw com
its inoperative position, latch means for Iholding each of
said supportin-g flanges in its respective inoperative posi
prising lan elongated vertically disposed lower leg and
an upper connecting linkage mechanism including spaced
parallel links pivoted to the leg and to the supporting
tion, said coil-engaging finger being provided with la cam
40 lsurface thereon which, when the finger is in its horizon
tally projected position, is inclined with respect to the
structure for constraining the leg to maintain its vertical
frame-‘like member, said cam surface Ibeing adapted to
make camming engagement with the adjacent rim portion
disposition during swinging movements ‘of the jaws in
either direction, a horizontal rock-shaft carried »at the
lower end of each leg yand extending transversely to the
direction of movement of the latter, .la coil-engaging finger
pivotally mounted on said rock-shaft in the 'medial region
thereof for swinging movement about the axis of the
rock-shaft between -an 7operative position wherein the
finger is projected horizontally beyond the general contines
of la horizontally disposed coil when the two leg assem
blies -are disposed in close proximity to and in straddling
relationship with respect to the opposite ends of such
coil to thus cause the coil-engaging finger «of each- leg to
be moved toward its retracted position, and means for
selectively moving said leg assemblies toward land ‘away
50 from each other.
of the leg and an inoperative position wherein the finger
assumes a vertical position within the contines `of the leg,
an elongated substantially flat supporting flange for -a
References Cited in the file of this patent
UNITED STATES PATENTS
stack of metallic sheets lor the like pivotally mounted on
said rock-shaft on each side of said coil-engaging ûnger
for independent swinging movement about the axis of the
rock-shaft between an yoperative position wherein the
flange is projected horizontally beyond the general con
fines of the leg Iand an inoperative position wherein the
flange assumes a vertical position within the confines of
637,594
Hett ______________ __ Nov. 21, 1899
2,841,434
Hooker et al. __________ __ July 1, 1958
221,893
Great Britain ________ __ Sept. 25, 1924
FOREIGN PATENTS
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