US 3900179 A
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Description (OCR text may contain errors)
United States Patent Mocny et a1.
COLUMN ROLL OUT SUPPORT Inventors: Richard C. Mocny; Francis B.
Mueller, both of Downers Grove, Ill.
Assignee: Waco Scaffold & Shoring C0.,
Schiller Park, 111.
June 5, 1974 Appl. No.: 476,406
Related U.S. Application Data  Continuation-in-part of Ser. No. 322,969, Jan. 12,
1973, Pat. No. 3,815,858.
 U.S. Cl. 248/287; 249/219 R  Int. Cl. A47F 5/10; A47l-l 33/00; E046 17/16  Field of Search 248/295, 287, 285, 286, 248/288; 249/219 R, 18, 20; 254/133 R  References Cited UNITED STATES PATENTS 2,456,878 12/1948 Krupha et a1. 254/133 R 3,204,933 9/1965 Brence 254/133 R 3,504,879 4/1970 Strickland. 249/219 R X 3,771.753 11/1973 Wilbur 248/295 3,776,499 12/1973 Turner.... 249/219 R X 3,779,500 12/1973 Cox 249/219 R X 3,797,793 3/1974 Moritz et a1. 248/295 3,797,794 3/1974 Lane 248/295 6/1974 Mocny 249/219 R X 7/1974 Warren 248/287 Primary Exa'miner.l. Franklin Foss Attorney, Agent, or F irml-larbaugh and Thomas [5 7 ABSTRACT Two laterally and directionally adjustable supports for shoring and rolling out a formwork intact for reuse in successively pouring concrete floor slabs in a multistory building. Lateral adjustment includes extension brackets having bases mounted on structural columns each carrying a horizontal angle arm that defines a vertical weight-bearing flange and a lateral horizontal clamping flange. Horizontally adjustable support brackets rest on the vertical flanges and have clamping means engaging the clamping flanges to hold tubular support means erect against the vertical flanges in weight-bearing relation. The support brackets telescopically receive screw assemblies through their tubular means for adjustment from below as supported by a nut non-rotatably resting on the tubular means. Each screw assembly includes a roller roll out fixture and a flanged guide shoe fixture telescoping with the roller as supported by an intermediate collar vertically controlled by a winged nut on the screws.
ll Claims, 5 Drawing Figures 1 COLUMN ROLL OUT SUPPORT CROSS REFERENCES:
This application is continuation in part of our Application Ser. No. 322,969 filed 1/12/73, now US. Pat. No. 3,815,858.
BACKGROUND OF THE INVENTION:
Heretofore, concrete workform roll-out rollers have been rigidly supported on elements that are spaced laterally a substantial distance from the centerline of support brackets in order to be cleared by the support head of the screw jack when it lowers the formwork for roll-out. Furthermore, not all brackets and rollers are at the same level on the structural columns nor are the rollers necessarily in alignment for roll-out. Also, not all distances between the column and a form beam engaged by the roller are the same. Generally, substantial space is provided between the adjacent workforms that are located on the opposite sides of a column, which space is occupied by narrow secondary forms. These forms drop out or are removed when at least one of the adjacent main forms is lowered sufficiently for roll-out. This generally increases or leaves substantial lateral clearances between the main forms and structural columns in which uncontrolled form beams during roll-out can weave, scar the column, and upon occasion laterally roll off of the roll-out rollers. This generally causes a binding of the forms and incurs delay and extra work and also leads to damage to the forms and materially decreases their longevity if they are knockdown forms for reuse at other building sites.
SUMMARY OF THE INVENTION:
In the present invention, not only is adequate clearance provided between structural columns and formwork for free roll-out, but provision is also made on laterally adjustable beam support shoes for guides to direct the form beams on the rollers, and protect them against derailment. This affords as much column clearance as will be required, or desired, merely by positioning the roll-out rollers and the flanged shoes laterally towards or away from the columns, or both, to align both the shoe and guide for uniform, rectilineal roller support, both laterally and vertically, and the same for the rollers and guides for a free undistorted form rollout. Not only does this prevent roll-offs where the clearances are desired but also increases the ease of roll-out and longevity of forms for repeated use with beams supported against spreading or being cramped, particularly where steel beams are accurately spaced and squared as disclosed in the co-prepared application of Ratcliff, et al, Ser. No. 478,698, filed June 12, 1974.
Although reusable formwork support brackets mounted on the structural columns of a building under construction have been provided that are adjustable as to height for levelling the form and then lowering the formwork for roll-out and reuse, in the present invention they individually are universally adjustable independently, even to angular direction with respect to the vertical plane of the supporting bracket, and collectively are adjustable with respect to their alignment and the spacing of the guides for holding the forms in line and securely in orientation on the roll-out rollers. Accordingly, even with some discrepancy in the base mounting which may not be exactly square to their alignment, the rollers will be brought square to the line of roll-out with little tendency for the forms to roll off of the rollers even where substantial roll-out clearances are providedv Furthermore, once the beams are located on the roll-out brackets, their guided relation is maintained regardless of the height of adjustment of shoe or roller.
In the present invention the opposing supports include simplified easily handled extension brackets each having a base plate which may be releasably secured to a column within wide tolerances and a horizontal L- beam section or bar end-welded thereteo to provide arms approximately extending towards each other in pairs when mounted in place on building columns. A variation of :1 5 horizontally and four inches vertically are tolerable. Vertically oriented tubular support brackets are slidably received on the arms as clamped thereto in a spaced relation predetermined by the spacing of the roll-out beams of a formwork. The tubular supports closely but freely receive externally threaded members of screw assemblies in an axial telescoping erect relationship. Two nuts are carried by each screw. The lower nut non-rotatable engages the support in weight-bearing relation for vertical adjustments by rotating the screw from its lower end. The upper nut is a winged nut which could include carrying an antifriction spacer above it.
The upper end of the screw swivelly supports a roller fixture directly and also a load bearing shoe fixture which non-rotatively telescopes therewith and rests on the collar spacer supported by the winged nut whereby adjustment of the winged nut determines whether the weight of the formwork is borne for rollout or held by the shoes in a fixed position. The relative position of the roller and the shoe remain unchanged when they are moved vertically as a unit by screw rotation. Thus, the shoe can be initially lowered for the roller to be levelled to support the beams of the form without distortion when deposited thereon. The shoes are then raised a predetermined distance therefrom to take the form load when thewinged nuts are advanced a predetermined number of revolutions. Thereby, the roller and shoe fixtures jointly have universal directional orientation as well as a'separate relative vertical adjustment with respect to each other. A workman merely finalizes the major adjustment with an extension wrench from below with substantial savings of time and effort.
Other and further objects and advantages will become apparent from the description and drawings which follow including the ease of fabrication of the embodiment shown; simplicity of operation and servicing; and minimized effort to adjust relative position of parts with minimum friction.
IN THE DRAWINGS FIG. 1 is a perspective view from below showing a preferred embodiment of the invention operating to support formwork for a poured concrete floor slab above with the shoe fixture with its guide plate away from the column;
FIG. 2 is a perspective view of the support shown in FIG. 1 taken from above without the formwork in place and with the shoe fixture in its preferred working position with its guide plate next to the column;
FIG. 3 is a vertical sectional view of the assembly of the tubular support bracket means shown in FIG. 1;
FIG. 4 is an end elevational view of the assembly shown in FIG. 1 taken partly in section; and
FIG. 5 is a partly sectional view showing parts of the embodiment in FIG. 1 as taken on line 5-5 in FIG. I.
THE PREFERRED EMBODIMENT:
Referring in further detail to the drawings, a concrete structural column 10, of a building that is being built of poured concrete, is shown in FIG. 1 supporting formwork 12 upon which concrete is poured to form the slab 14 of the next floor above. After hardening, another series of structural columns will be formed above as extensions of the lower ones and the formwork as illustrated can be lowered a substantial distance, rolled out intact in a horizontal direction from below, and then, as a flying form, rigidly relocated on supports 27 fastened to extensions of the columns for reuse in forming the next slab 14, etc.
Preferably, the frame of the formwork includes longitudinally disposed parallel I-beams l6'with slings I8 that support cross joists which in turn support plywood form panels 22 as more particluarly described in said Ratcliff, et aI, application. The column 10 is one of many arranged in pairs that are spaced and aligned in parallel rows in a repetitive pattern with each having spaced securement bolts 23 through them with wide tolerances to clamp the base members 26 of the support 27 in place, particularly if the columns are rounded in shape.
Although the support 27 can be made up of steel castings without need for welding, it is illustrated as made in two parts one of which is the extension bracket 28 and the other a support bracket 38. The extension bracket 28 includes a base 26 which has end-welded thereto a length of an angle iron 30 with a deep flange portion 32 thereof disposed vertically for weightbearing purposes and a narrow flange portion 34 disposed horizontally to serve as the stationary part of a clamp 36 (FIG. 2) which adjustably receives a support bracket 38 at any selected position along the flange 32. A stop 35 is welded at the free end of the angle iron 30 to prevent unintentional disassociation of the assembly.
The support bracket 38 is a screw lift 40 which is mounted for adjustment along the flange 32 and includes a T-shaped body portion 42 of two plates 44 and 46 (FIG. 3) welded together at a right angle as at 48 with welded spaced right triangular braces 50 interbracing them. The upright plate 44 rests against the vertical flange 32 and receives on its outer surface the tubular member 50 of the screw lift 40 as offset welded thereto at 51 to provide maximum extension of the screw lift 40 and terminates below the upper end thereof as held structurally in place by suitable squaring braces 52.
Beyond the edge of the horizontal flange 34 the horizontal plate 46 is apertured at 53 to receive bolts 54 therethrough. A pivotal clamping element 54 similarly apertured at 55 inside a fulcrum member 56 welded thereto serves as a jaw 58 for clamping the bracket 38 any place along the bar merely by tightening nuts 57 on the bolts 54 to draw the clamp element 58 against the bottom face of the horizontal flange 34. The nuts are accessible from below for actuation by a socket power wrench for individual spot adjustn'ients.
The screw jack assembly 60, including a coarse threaded screw 62, can be slipped into place in the tubular member 50 either before or after the extension bracket 28 has been positioned and carries two nuts 64 and 66 above the tubular members 50. Preferably the screw 62 is a sleeve more than twice the length of the tube 50 and is provided at its lower end with a wrenching member 68. It can be machined or formed square, or a cast member can be used, but is illustrated as a hex head nut 68 welded thereto at 70 for engagement by a crank or power wrench (not shown) for rotating it. The opening (not shown) through the nut 68 drains the interior of the screw 62 to avoid dangers of water collection and freeze ups.
The upper end of the screw 62 removably supports a shoe fixture 72 and a roller fixture 74 rotatively which telescope with each other on the screw. For this purpose the screw 62 internally removes the vertical spindle 76 of the roller fixture 74 that has a yoke 78 secured thereto whose arms 80 carry an axle 81 that journals the roller 82. The bight of the yoke 78 rests rotatively on the flattened upper end 83 of the screw.
The shoe fixture 72 is load bearing and has a collar 84 loosely received externally on the upper end of the screw 62 as rotatively and adjustably supported in axial telescoping relationship by the winged nut 64 threaded on the screw adjacent to its upper end. The collar 84 carries a yoke 78 telescoping laterally over the roller fixture 74 and terminating in diverging flat arms 86 that define a flat head 87 to engage the beam 16 of the formwork 12. The edges of the yoke 78 are reinforced by contour cut plates 88 welded thereto and define a well 89 into which the roller fixture can non-rotatively telescope to a level below the head 87. Upon at least one side a cut plate 88 extends above the highest adjustment point of the roller 82 to provide a flange 88A resting laterally against the base flange 17 (FIG. 1) of the formwork beam 16. The flange receives the formwork beam 16 for geometric alignment once they overlap in height, and the beam in turn through the flange 88A thereby nonrotatively supports the shoe fixture 72 and the roller fixture 74 against rotation relative to the support bracket 38. This non-rotative engagement of the flange 88A with the beam also prevents swivel rotation of both the shoe fixture 72 and the roller fixture 82 on top of the screw regardless of which one is actually in contact with the beam 16. The relative support adjustment between the shoe 72 and roller 82 is not disturbed when bodily raising and lowering the two fixtures as a unit as when turning the screw 62 in the cam nut 66 for gross or fine adjustment levels.
Thus, the roller and shoe fixtures are rotatable on top of the screw 62 and respond to universal directional orientation in a horizontal plane to square-engage a formwork beam when oriented. Adjustment of the winged nut 64 on the screw 62 raises or lowers one fixture with respect to the other without relative rotation between them and the screw 62 bodily raises and lowers them as a unit in their adjusted relation by being rotated in the non-rotative nut 66. Accordingly, the roller 82 is freely orientable to accommodate the direction of endwise movement of the beam, and also to be readily repaired if damage is incurred. Either the roller or head, or both. can be removed and replaced by merely lifting either or both members from the upper end of the screw sleeve.
As noted, the tubular member 50 is shorter than the plate 44 preferably at both ends by a distance approximately the height of the nut 66 and the space between the plate 44 and the exterior surface of the screw 62 is less than the major diameter of the hex wrenching contour nut 68. Thereby, when the screw jack assembly is lowered into place on the top of the tubular member 50, any minor diameter flat portion of the hex contour of the nut 68 will be disposed next to the plate 44 (FIG. 4) and will be thereby held against rotation when the nut 68 is in weight-bearing relation on the tube 50.
The load of the formwork beam 16 is carried by the nut 68 from the screw 62 regardless of which fixture is the highest. If the roller 82 is the highest the load is transmitted directly from the roller fixture 74 to the upper end 83 of the screw. If the shoe fixture is the highest, the load is transmitted by the head 87 through the collar 84 and the winged nut 64 to the screw 62.
With the present invention the relative installation heights of the respective fixtures 28 are not critically significant regardingvariations in heights between respective sets of mounting bolts 24' since the roller and head assembly units can be levelled easily throughout the building area bya crank or power wrench (not shown) engaging the hex headed lower ends 68 of the screws 62 and adjusted, if need be, to transit sightings.
During installation the preassembled formwork is preferably lowered intact onto levelled roller fixtures with the flanges 88A preferably located remote from the columns. Thereby, the fixtures 72 and 74 are disposed properly under and in alignment with the beam 16 and the forms can be rolled into place in tight engagement with one another. Thereupon, the formwork beams 16 can then be raised by the shoe fixtures 72 to their final height by operation of the winged nuts 64 ready for pouring.
After the concrete slab 14 is poured and hardens sufficiently, the screws 62 are progressively retracted downwardly as turned from below'until the formwork 12 drops free of the slab. and, is low enough to roll out. There'upon. the winged nuts 64 are retracted to expose the roller fixtures 74 to contact with the formwork beams and with the guide flanges 88A engaging the sides of the beams, the rollers are held oriented in the roll-out direction for the rollout.'
What is claimed is: v
1. In a device of the class described for shoring and rolling out formwork intact having spaced parallel beams for reuse in pouring concrete floor slabs, the combination of two support means laterally and directionally adjustable on adjacent sides of spaced structural columns comprising:
lateral adjustment extension means having opposing bases mounted on the structural columns and carrying horizontal arms defining vertical weight bearing flanges extending approximately towards each other,
shoring bracket means resting against said vertical flanges to form one side ofa clamping member and adjustably movable towards and away from each other on said arms and including second clamping members for holding them in a predetermined spaced relation related to said parallel beams vertically disposed tubular elements spaced the same distance as said beams,
screw lift means including screws supported in said tubular elements and including nut means threaded thereon for raising and lowering said screws when the screws are rotated.
roller fixture means swivelly supported with respect to and on the upper end of the screws carrying hor izontally disposed rollers to engage said parallel beamsin roll-out relationship, guide flange means disposed square to said rollers and swivelly carried by 'said screw to engage said beams in laterally and longitudinally ruiding relationship for confining the rollers square to a predetermined roll-out path for the formwork. 2. The combination called for in claim 1 in which said elongated element comprises an angle arm that defines a. vertical weight bearing flange and said fixtures are supported directly in line above it. r
3. The combination called for in claim 1 including a winged nut on said screw lift means and means intermediate said nut and said fixture means including aspacer sleeve. I i
4. An adjustable support for shoring and rolling out a workform intact for reuse in pouring concrete floor slabs comprising:
an extension bracket having; a base portion to engage a structural column in supported relation and an elongated element extending horizontally therefrom;
a unitary support bracket slidable mounted adjust ably upon said element and having a vertically disposed tubular member in supported close proximity to the element and receiving a nut means in supported non-rotatable relation;
screw lift means including a screw telescopicallyreceived and rotatable in said tubular element and supported by said nut means;
roller fixture means swivelled about a vertical axis at the upper end of the screw to engage a beam of a reusable formwork in rolling relation;
shoe fixture means supported swivelly on the upper end of the screw in relative non-rotatable relation with said roller fixture means to contact the beam in supporting relation;
means for adjusting said fixtures vertically relative to each other for selective engagement with said beam; and
guide flange means disposed square to said roller carriedby one of said fixtures means to square said roller and beam in laterally and longitudinally guiding relationship.
5. The device defined in claim 4 in which said adjusting means is a'winged nut carried by screw intermediate adjusting means and said shoe fixture means.
6. The device-defined in claim 4 in which said support bracket and said elongated element have vertical walls in face-to-face contact with each other; and
clamp means securing said walls in relative horizontally adjusted relation.
7. The device defined in claim 6 in which said vertical wall carries a clamping means engaging a horizontal wall on said horizontally extending elongated element having a stop means at its free end.
8. The device defined in claim 4 in which said fixtures are disposed approximately the same height at a rela tive point intermediate their relative vertical movement.
9. An adjustable support for shoring and rolling out a formwork intact for reuse in successive pouring of concrete floor slabs comprising:
an extension bracket having a base portion securable to a structural column and carrying a horizontal extension am having a weight carrying vertical flange;
a support bracket having a vertically oriented tubular element and resting in weight supported relation on said extension arm in horizontally adjustable relation;
screw lift means rotatably received in said tubular element for close vertical alignment as its lower end and including first nut means on said screw lift means supported non-rotatively on said support bracket,
a roller fixture swivelly supported upon the upper end of the screw lift means,
a shoe fixture supported swivelly on said upper end below said roller fixture, said fixtures telescoping in relative non-rotative relationship,
second nut means on said screw lift means below said shoe fixture for adjusting said fixtures vertically relative to each other for selective engagement with said workform, and
means squaring said roller fixture to said formwork in laterally and longitudinally determined relationship.
10. In a device of the class described for shoring and rolling out formwork intact having spaced parallel beams for reuse in pouring concrete floor slabs, the combination of two support means laterally and directionally adjustable towards and away from each other and supported on adjacent sides of spaced structural columns, said support means comprising:
lateral adjustment extension means having opposing bases mounted on the structural columns and carrying horizontal arms defining vertical weightbearing flanges extending approximately towards each other,
shoring bracket means having lateral flanges resting on said arms carrying bodies with vertically disposed tubular elements resting against said vertical flanges to form one side of a clamping member and adjustably movable towards and away from each other on said arms and including second clamping members on the other side of said lateral flanges for holding them in a predetermined spaced relation related to said parallel beams with the vertically disposed tubular elements spaced the same distance as said beams,
screw lift means including screws slipped into said tubular elements and including nut means threaded thereon for raising and lowering said screws in supported relation when the screws are rotated,
roller fixture means supported and coaxially swivelled on the upper end of the screws and carrying determined roll-out path for the formwork. l I. An adjustable support for shoring and rolling out a formwork intact in pouring concrete floor slabs com- 10 prising:
an extension bracket having a base portion to engage a structural column in supported relation and an elongated element extended horizontally therefrom defining walls disposed at right angles to one another, one of which has a stop means at its free end,
a support bracket slidably mounted adjustably upon said element and having a vertically disposed tubular member, said element having a wall in face-toface contact with one of said walls to define a pair of vertically disposed walls and another wall in face-to-face contact with the other of said walls to define a pair of horizontally disposed walls, said vertical pair of walls erectly supporting a vertically disposed tubular member in supported close proximity to said element and receiving a nut means in supported non-rotatable relation,
clamp means carried by one wall of one of the pairs of walls including an element clamping against the other wall of said one of the pairs of walls to secure them in relative horizontally adjusted relation,
screw lift means including a screw telescopically received and rotatable in said tubular element and supported by said nut means,
roller fixture means supported swivelly about a vertical axis on the upper end of the screw to engage a beam of a reusable formwork in rolling relation,
shoe fixture means supported swivelly on the upper end of the screw in relative non-rotatable relation with said roller fixture means to contact the beam in supporting relation,
means for adjusting said fixture means vertically relative to each other for selective engagement with said beam, and
guide flange means disposed square to said roller carried by one of said fixture means to square said roller and beam in laterally and longitudinally guiding relationship.