Title:
SHORE BRACKET
United States Patent 3771753


Abstract:
A shoring bracket for overhead form work has a support head engageable with a form work beam. The head is vertically adjustable for positioning of the form work. The head of the bracket includes a roller engaging the form work beam and a lock for the roller to prevent rotation thereof when the head is supporting the form work. The roller is unlocked for longitudinal rolling of the form work beam over the roller for removal of the form work.



Inventors:
Wilbur, James Justin (Closter, NJ)
Kamholtz, Richard (New York, NY)
Application Number:
05/218908
Publication Date:
11/13/1973
Filing Date:
01/19/1972
Assignee:
HARSCO CORP,US
Primary Class:
Other Classes:
249/18, 249/219.1
International Classes:
E04G17/16; (IPC1-7): A47F5/10; A47H33/00
Field of Search:
248/295,296 249
View Patent Images:
US Patent References:
3504879COLUMN SHORE BRACKET1970-04-07Strickland
3425659SLIP FORM APPARATUS FOR TAPERED PIERS1969-02-04Eriksson
2386525Roof center1945-10-09White



Foreign References:
SE108912A
Primary Examiner:
Foss, Franklin J.
Claims:
What I claim is

1. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation.

2. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, said locking means including a wedge movable into engagement with said roller and manually actuable screw means for moving said wedge.

3. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, including a head mounted on said shaft, spaced uprights on said head, said roller being mounted between said uprights and a wedge for locking said roller against rotation mounted on said head between said uprights.

4. A bracket as described in claim 3, including a flange secured to said head and spaced from said roller for engagement by a portion of the form work supported by said roller.

5. A bracket as described in claim 3, including a manually actuable screw carried by said head and moving said wedge carried by said head into and out of engagement with said roller.

6. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, including a key mounted in said housing and a longitudinal slot in said shaft receiving said key whereby rotation of said shaft in said housing is prevented.

7. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, including a head mounted in said shaft and notches in upper end of said threaded shaft engaging a rod welded in said head whereby said roller is positively aligned for direction in relation to form work.

8. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, including a head mounted on said shaft and notches in the upper end of said threaded shaft engaging a rod welded in the head of said bracket whereby rotation of said head on said threaded shaft is prevented.

9. A shore bracket for supporting form work used in concrete construction for vertical mounting on columns or walls comprising a base secured vertically to the column, a hollow tubular housing mounted vertically on said base, a non-rotating threaded shaft slidably mounted in said housing, a threaded nut mounted on said shaft and engaging the upper end of said housing, a roller for engaging the form work mounted on the upper end of said shaft vertically above said nut and means for locking said roller against rotation, said locking means including a wedge movable into engagement with and on the under side of said roller whereby said wedge supports part of the load to be applied upon said roller.

Description:
BACKGROUND OF THE INVENTION

The present invention relates to support brackets for shoring for form work and more particularly relates to a bracket mounted on a column for vertically adjustable support of the form work. A roller head is released for removal of the form work.

A column shore bracket as disclosed in U.S. Pat. No. 3,504,879 and the several patents cited during the prosecution thereof are considered to be the most pertinent prior art in this field. The shore bracket of the patent aforesaid has a plate support for the beam of the form work and when this support is lowered the beam comes into engagement with a roller for removal of the beam and form work.

The present invention has a less complicated and less expensive construction to manufacture and use while providing secure support for the beam of the form work by locking the roller head against rotation and yet permitting easy removal of the beam and form work by unlocking the roller and freeing it for rotation for removal of the supported beam.

SUMMARY OF THE INVENTION

The shore bracket of the present invention comprises a base secured to a vertical column by suitable bolts or other securing means and this base has vertically mounted thereon a tubular housing in which a threaded shaft is mounted for vertical movement. A nut is mounted on the threaded shaft and engages the top of the tubular member. A roller bracket is mounted at the top of the threaded shaft and a roller is mounted for rotation in the bracket. A lock for the roller is also mounted in the bracket and is moved into and out of engagement with the roller by suitable means such as a threaded bolt or the like. The roller bracket may also include a vertically extending member to act as a stop for the adjacent beam of the form work when the beam is resting on the roller.

BRIEF DESCRIPTION OF THE DRAWINGS

A preferred embodiment of the present invention is shown in the accompanying drawings, in which like reference characters indicate like parts. In these drawings, FIG. 1 is a view of a preferred embodiment of the present invention in beam supporting position mounted on a vertical column;

FIG. 2 is a partial view of the embodiment of FIG. 1 showing the construction for locking the roller of the head of the bracket against rotation; and

FIG. 3 is a partial sectional view of the embodiment of FIG. 1 on the line A--A thereof.

DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference now to the drawings, a preferred embodiment of the shore bracket of the present invention utilizes a vertical column 10 to which a base 11 for the bracket is suitably secured by bolts 12. A hollow tubular housing 13 is secured vertically in base 11 as by welds 14 and threaded shaft 15 is slidably mounted therein. Nut 16 is mounted on the threads of shaft 15 and rests upon the top of tubular housing 13. Shaft 15 is slotted at 17 (FIG. 3) to receive a key 18 and key 18 passes through a corresponding slot 19 in housing 13 and is secured in position by welds 20. Key 18 prevents shaft 15 from rotating on actuation of nut 16 permitting shaft 15 to slide vertically in tubular housing 13. Shaft 15 is notched at its upper end to engage rod 22. A head 21 is mounted on the upper end of threaded shaft 15 and is aligned for direction and prevented from rotating on shaft 15 by the engagement of notches in shaft 15 with rod 22. Rod 22 is secured on each end by welds to head 21. A plate 23 is secured across the top of cap 21 by welds 24 and spaced uprights 25 and 26 are secured to plate 23 by welds 27 and 28, respectively. Cross bars 29 and 30 are secured across uprights 25 and 26 and a flange 31 is secured across bars 29 and 30 adjacent column 10. Uprights 25 and 26 are suitably bored to receive a shaft 32 which is locked in position by set screws 33 and 34 and a roller 35 is mounted for rotation on shaft 32.

A wedge lock 36 rests on plate 23 between uprights 25 and 26 and is mounted upon threaded bolt 37. The head of bolt 37 is spaced from cross member 29 by washer 38 and the force required to rotate bolt 37 is adjusted by positioning nut 39 against spring washers 40 which bears against cross member 30. Rotation of threaded bolt 37 moves wedge 36 into and out of engagement with roller 35 and when in engagement with roller 35 prevents roller 35 from rotating as well as supporting a part of the load applied upon said roller.

In use, base 11 is bolted to column 10 adjacent the position for the form work and nut 16 is rotated in the appropriate direction to position roller 35 adjacent the position of the form work. With wedge 36 in position to lock roller 35 against rotation, a beam 41 for the form work is mounted on roller 35 and is spaced from column 10 by bracket 31. Beam 41 is then suitably plumbed or positioned by appropriate rotation of nut 16, it being understood that beam 41 will extend over and be supported by a plurality of the shore brackets and the form work will then be completed. After completion of the form work, concrete is poured and permitted to harden.

When the form work is to be removed, nut 16 is appropriately rotated to allow shaft 15 and roller 35 to drop and the lowered form work frees itself from the hardened concrete. Thereafter, bolt 37 is suitably actuated to withdraw wedge 36 from engagement with roller 35 and beam 41 and adjacent portions of the form work may then be withdrawn laterally and away from the hardened concrete over roller 35 for reuse elsewhere.

The shore brackets are then removed and reused for form work support elsewhere in the building being constructed.

Changes in or modifications to the above-described preferred embodiment of the present invention may now be suggested without departing from the present inventive concept. Reference should therefore be had to the appended claims to determine the scope of this invention.