US3409156A

US3409156A - Coil lifter

Info

Publication number: US3409156A
Application number: US584454A
Authority: US
Inventors: Mills Sam
Original assignee: Individual
Current assignee: Individual
Priority date: 1966-10-05
Filing date: 1966-10-05
Publication date: 1968-11-05
Anticipated expiration: 1985-11-05

Description

Nov. 5,- 1968 s. MILLS 3,409,156

COIL LIFTER .Filed OCT.- 5, 1966 5 Sheets-Sheet 1 534/14 44/446 fld INVENTOR.

S. MILLS COIL LIFTER Nov. 5, 1968 5 Sheets-Sheet 2 Filed Oct. 5, 1966 -5I4/I4/W/d6' INVENTQR.

BY wa Nov. 5, 1968 s. MILLS 3,409,155

COIL LIFTER Filed 00?.- 5, 1966 5 Sheets-Sheet 5 INVENTOR.

United States Patent 015cc ABSTRACT OF THE DISCLOSURE The invention is an improved device for lifting coils or rolls of strip material, suchas metal, having a relatively large center opening. The'device comprises a, pair of C clamps which clamp to, the coil in spaced relationship. The clamps are carried by a member in such a way that the coil and the clamps can swing about :a horizontal axis when the clamps and coil are lifted. The member to which the clamps are attached has a position such that the said horizontal axis about which the coil swings when lifted is in a position so that merely by lifting the coil by means of a fork lift or the like, it swings from a position in which its axis is vertical to a position in which its axis is horizontal and in which it can be maneuvered and then mounted on a mandrel. The said member is configurated to directly receive the forks of a fork lift.

This invention relates to apparatus or equipment particularly adapted for handling and transporting heavy objects of the type which ordinarily are cylindrical having a center opening. More particularly, the invention is especially adapted for the handling and transportation of coils or rolls of strip material such as metal. The invention will be described in an exemplary form herein as adapted for use with coils of strip material, such articles normally being relatively heavy and unwieldy.

The coils as referred to present problems in handling, transportation, and storage. These problems include those of attaching or,securi ng lifting and handling meansto the coil, and the problem of transferring the coil from a position in which its axis is vertical to a position in which its axis is horizontal 'or at some other angle. Because oft he configuration of the article, i.e., the coil and its weight, completely satisfactory solutions to the problem stated have not been available, and it is the primary object of this invention to provide simplified, economic, inexpensive, but. yet extremely effective solutions to the problems stated. The invention provides these solutions in the form of simplified but effective means, and techniques for grabbing or securing to the coil, lifting it, changing its position and transporting the coil.

Coils of the type referred to may be stored on fork lift pallets with their axes vertical. For utilization of the strip metal an individual coil must be lifted from its storage position and moved into a position wherein its axis is horizontal for mounting on a rotatable mandrel so that the coil can be unwound and desired lengths of strip metal removed. Accordingly, it isnecessary that the apparatus or equipment have means for grabbing or securing to the coil while its axis is vertical; then lifting it and reorienting it so that the coil'axis is horizontal; transporting it and placing it on the rotatable mandrel.

In the exemplary form of the invention the apparatus is constructed adapting it to be engaged by the prongs or forks of a fork lift truck so that the fork lift is adaptable for lifting the coil from its storage position; reorienting its axis while being lifted and transporting the coil for mounting on the rotatable mandrel. In the preferred form of the invention, the lift apparatus comprises means for grabbing or securing the coil on the side of it opposite or away from the fork lift truck. The lift apparatus comprises a frame having openings to receive the prongs of 3,409,156 Patented Nov. 5, 1 968 the fork lift and the grab or grabs which secure to the coil are pivotally or rotatably attached to the said frame so that upon lifting or elevating by the fork lift, the grabs holding the coil are free to rotate so that the coil is orien tated into a position in which its axis is horizontal. It can then be readily transported by the fork lift to the rotatable mandrel for installation thereon.

In the light of the foregoing, a further object of the invention is to provide an improved coil lift embodying a supporting frame having coil grabs or securing means, rotatably or pivotally attached thereto to allow reorientation of a coil or the like, held by the grab means while the coil is being lifted, from a position in which the coil axis is vertical, to a position in which the coil axis is hor izontal. Y

Another object is to provide lift means as in the foregoing object wherein the grab means comprises a pair of clamps pivotally attached to the supporting frame allow; ing rotation thereof when the frame is lifted by a fork lift or the like. 1

Another object is to provide a coil lift means as in the foregoing object wherein the said frame is configurated to receive the prongs of the fork lift and/or to be transported, suspended by' a chain fall from an overhead carrier.

Another object is to provide a lift means as in the foregoing wherein the frame is provided with a sleeve having a transverse relatively rotatable bar passing therethrough and the same clamps having openings receiving the said bar so that the clamps are rotatable thereabou Further objects and additional advantages of the invention will become apparent from the following detailed description and annexed drawings wherein:

FIGURE 1 is a perspective view of a preferred form of the invention associated with a fork lift truck;

FIGURE 2 is a view of the form of the invention of FIGURE 1 showing the coil in lifted position;

FIGURE 3 is a view showing mounting of a coil held by the lift means of the invention on a rotatable mandrel;

FIGURE 4 is a view of the lift means of the invention holding a coil and suspended from an overhead carrier;

FIGURE 5 is a detail view of the frame of the coil lift of FIGURES 1 to 4;

FIGURE 6 is a perspective view of a modified formof lift means and modified lifting technique;

FIGURE 7 is a partial detail view of modified form of lifting frame;

FIGURE 8 is a side view of the frame of FIGURE 7;

FIGURE 9 is a view of a modified form of coil lift particularly adapted for transportation suspended from an overhead carrier;

FIGURE 10 is a detail view of a slightly modified form of carrier frame.

Referring now more in detail to FIGURES 1 to 5 of the drawings, numeral 10 designates a conventional fork lift truck having wheels as shown at 11 and 12. The truck has a body or frame 15 and uprights 17 and 18. The uprights are part of a conventional elevator structure providing a guide means for a vertically moveable lift or elevator 20, which is moveable upwardly and downwardly by power means, forming part of the fork lift. Attached to the member 20 are the forks or prongs of the fork lift as designated at 22 and 23. The forks having

upright portions

25 and 26 attached to the member 20.

Numeral 30 designates a conventional wooden fork lift pallet having a base 31; upper transverse members 32 and spacer members such as shown at 33 providing spaces as shown at 35 adapted to receive the forks of a fork lift when it is desired to lift and transport a load on the pallet, carrying the pallet with the load.

Numeral 40 designates a coil of metal strip material 3 having center opening 41. In FIGURE 1 the coil is resting on the pallet with its axis in a vertical position.

The coil lift apparatus or unit is designated generally at 44; it comprises a frame as shown at 45 having a configuration as shown in the drawings. In the exemplary form of the frame 45 it has an upper transverse member 46, a lower transverse member 47,

straight side portions

48 and 49, and tapered lower side portions 51 and 52. Formed in the frame are

upper openings

55 and 56 and lower

triangular openings

58 and 59. Between the openings is an intermediate opening 62 which is triangular with an apex at the top. This opening is adapted to receive the hook 64 of an overhead suspending and carrying means having a chain 65 attached to the hook 64.

At the lower part of the frame 45 there is rigidly secured a transverse rod or bar 68 having washer stops 69 and 70 at its ends.

A pair of C clamps is rotatably supported or carried on the bar 68. One of these clamps is designated generally at 75. It is of C clamp configurtion having a bight portion and

leg parts

76 and 77, the leg part 77 having an opening 80 therein which is received on the bar 68. The leg part 77 has a bushing 81 at the end and threadedly received therin is a stem 83 having a rotating bar 85 at its end. At the other end of the stem 83 is a shoe 86 adapted to engage the exterior of the coil 40. At the end of the leg 76 is a shoe 88 adapted to engage the inside circumference of the coil 40. The C clamp 75' is like the clamp 75 and is similarly rotatably mounted on the bar 68 on the other side of the frame 45. Thus the parts are relatively oriented as shown in FIGURE 1.

FIGURE 1 illustrates the preferred technique for grabbing a coil and lifting it. The

forks

22 and 23 of the fork lift are extended over the coil with the

forks

22 and 23 extending through the

openings

55 and 56 in the frame 45.

Numerals

90 and 91 designate manually adjustable screws extending through the top transverse member 46 of frame 45 for firmly attaching the frame 45 to the forks of the fork lift with the frame in a position as shown in FIGURE 1. In this position the C clamps 75 and 75 are substantially horizontal extending inwardly from the frame 45 so as to secure to or grab the coil 40 in two positions along radii on the side away from the fork lift 15. After securement as shown in FIGURE 1, the elevator of the fork lift is raised so that the coil 40 is lifted and reoriented from a position in which its axis is vertical to a position in which its axis is horizontal as shown in FIGURE 2; during this movement the coil bodily rotates from the position of FIGURE 1 to that of FIGURE 2, the C clamps rotating about the axis formed by the bar 68. It can be seen, therefore, that the movement is extremely stable and efficient, and that the grabs, i.e., the C clamps which are symmetrically positioned simply automatic-ally rotate during the lifting operation. At the end of the lifting operation the coil is held suspended directly below the frame 45.

The fork lift truck can then be moved to any desired location such as to the position of a rotatable mandrel upon which the coil 40 may be mounted for unwinding desired lengths of strip material. Such a mandrel is shown in FIGURE 3, being mounted on a pedestal having an upright supporting vertically oriented disc 101. Extending from the disc 101 are support arms 103 and 104 to which are pivoted bell crank support levers 106 and 107. Centrally mounted on the disc 101 is an extending stem 110 having a manually operable hand wheel 111 at its end. On this stem is a bushing or sleeve 112 which is attached to the bell crank levers 106 and 107 by links 114 and 115. The fork lift carrying the coil 40 is moved up to the mandrel and the coil is positioned so that arms of the bell crank levers 106 and 107 extend into its central opening as shown. By then turning the hand wheel 111 the bushing 112 and the bell crank levers are moved or adjusted so that the arms of the bell crank levers firmly engage inside circumferential surfaces of the coil 40 to support it in a rotatable position on the mandrel. In this position it can be conveniently rotated for unwinding and removing pieces of strip metal therefrom.

FIGURES 7, 8, and 9 show a modified form of coil 1 lift or grab apparatus and technique for lifting. The coil lift apparatus includes a frame as designated at 130. As may be seen in FIGURE 7 this frame is-generally. rectangular having a-top member 131, a bottom member 132 and

side members

133 and 134. At the upperpart the' frame has rectangular openings 136 and 137'to receive the

forks

22 and 23 of the fork lift. The'adjustin'g and clamping

screws

90 and 91 are like those of the previous embodiment. Depending from the frame member 132 are a pair of hook members as designated at 140and 141 having hook ends 142 and 143. 'These hook members are braced to the frame member 132 by webs 145'and 146.

The transverse bar 68 is held in the

hooks

142 and 143. The C clamps 75 and 75' are like those of the first embodiment. s

Extending downwardly from the intermediate part of the member 132 is a lug and attached to' it by a transverse pin 151 is a U-shackle 152 to which attachment may be made.

FIGURE 6 shows another technique for lifting and transporting the coil 40. FIGURE 6 shows the coil being lifted by the fork lift from a position in which it was resting on the pallet 30 with its'axis vertical. The technique of FIGURE 6 is one wherein the coil is grabbed or secured to at the side nearest to the fork lift. When the lift is initially secured to the coil, with the coil in the horizontal position, the C clamps extend forwardly from the frame 130 so that when the coil is lifted as shown in FIGURE 6 the C clamps are on the side of the coil away from the lift truck. The C clamps are rotatable about the bar 68 as in the first embodiment, which bar is separable from the frame 30 merely by being lifted out of the

hooks

142 and 143. Utilizing this form of the invention the coil may be secured to, lifted and transported as in the previous embodiments.

FIGURES 9 and 10 show a slightly modified form of coil lift means adapted for lifting and movement and transportation by a chain hoist. The chain of the chain hoist is designated at 65 having a hook 64 at its end. The lift comprises simply a sleeve 155 through which the bar 68 passes, the bar 68 passing through the openings in the C clamps as previously described. Sleeve 155 has a triangular piece 156 secured to it having a triangular opening 157 into which the hook 64 may be hooked. This provides very simplified but effective means for holding the grabs which secure to the coil for lifting, reorienting, and transporting the coil by means of a chain hoist, which may of course be carried on an overhead carrier movable on a trolley.

From the foregoing those skilled in the art will observe that the invention as described herein achieves and realizes all of the objects and advantages as set forth in the foregoing as well as having many additional advantages that are apparent from the detailed description. As set forth in the introduction, the invention is of an extremely simplified, inexpensive and economical nature, but yet very effective for its purpose. The device is extremely rugged, being capable of use with extremely heavy objects and is such as not to require maintenance, and is further not readily subject to deterioration.

What is claimed is:

1. An apparatus forlifting and transporting relatively heavy circular objects of the type having a center opening, said apparatus comprising clamping means for clamping the object along at least one radius thereof between the center opening and the outside thereof, a member attached to the clamping means whereby to allow rotation of the clamping means and the said object relative to the member about a horizontal axis, said member being adapted for attachment to lifting equipment for lifting the member, clamping means, and object, the clamping means and object having such positional relationship to the said member that upon elevating of the said member the object swings about said axis and is reoriented from a position in which the axis of the opening is vertical to a position in which the axis is horizontal, the clamping means rotating relatively to the said member, the point of attachment of the member to the clamping means remaining the same, the said member being configurated to directly receive the forks of a fork lift.

2. Apparatus as in claim 1 wherein the clamping means comprises a C clamp having a bight and legs, the said member having pivotal attachment to the C clamp at one of said legs.

3. Apparatus as in claim 1 wherein the clamping means have relationship to the said member such that when the clamping means are secured to an object to be lifted with the axis of its opening vertical, the said member is in a position spaced outwardly from the center of the object adjacent the periphery of the object.

4. Apparatus as in claim 3 wherein the clamping means comprises a C clamp which is in a position extending inwardly toward the center of the object from the said member when clamped in position for lifting the object.

5. An apparatus as in claim 1 wherein said clamping means comprises a pair of C clamps each having a bight and legs, one leg of each C clamp having pivotal attachment to the said member in spaced relationship from each other whereby to clamp the said object along radii spaced from each other.

6. An apparatus as in claim 1 wherein said member :has an opening adapted to receive the hook of a chain hoist.

7. An apparatus as in claim 1 wherein said member includes a transverse bar, the clamping means comprising a C clamp having a bight and legs and having an opening in one of said legs having said bar passing therethrough.

8. An apparatus as in claim 7 wherein said clamping means comprises a pair of C clamps each having a bight and legs, one leg of each clamp having an opening having said bar passing through the openings.

9. An apparatus as in claim 1 wherein said member comprises depending hooks having a bar carried transversely therein.

10. An apparatus as in claim 1 wherein said member comprises a sleeve, a bar passing transversely through said sleeve, the said clamping means comprising a C clamp having a bight and legs, one of the legs having an opening therein having said bar passing therethrough.

References Cited UNITED STATES PATENTS 2,535,546 12/1950 Pitts 2142.5 3,044,647 7/1962 Hopfeld 214-652 3,264,026 8/1966 Hansen 214-620 XR FOREIGN PATENTS 729,326 5/1955 Great Britain. 568,717 1/1959 Canada.

GERALD M. FORLENZA, Primary Examiner. F. E. WERNER, Assistant Examiner.