Adjustable concrete form apparatus

• US 4,052,031 A
• Filed: 07/26/1976
• Issued: 10/04/1977
• Est. Priority Date: 07/29/1975
• Status: Expired due to Term

• Current Assignee: Samuel T. Melfi
• Original Assignee: Samuel T. Melfi
• Inventors: Melfi, Samuel T.
• Primary Examiner(s): Husar, Francis S.
• Assistant Examiner(s): McQuade, John
• Application Number:
  US05/708,566
• Time in Patent Office: 435 Days
• Field of Search: 249/19-22, 249/33-47, 249/205, 249/207, 249/210
• US Class Current: 249/19
• CPC Class Codes: E04G 11/085 End form panels for walls for floors E04G11/365
• CPC Class Codes: E04G 11/10 of elements without beams which are mounted during erection of the shuttering to brace or couple the elementsE04G11/18 takes precedence
• CPC Class Codes: E04G 11/12 of elements and beams which are mounted during erection of the shuttering to brace or couple the elementsE04G11/18 takes precedence
• CPC Class Codes: E04G 17/14 Bracing or strutting arrangements for formwalls; Devices for aligning forms E04G25/00 takes precedence; connecting and aligning E04G17/04

Abstract

The concrete form apparatus includes a pair of spaced form sections. The form sections are held in properly spaced relation by spreader sleeves and threaded adjustment means in the form of a threaded rod which engages nuts suitably positioned on the form sections. The form sections can be erected and dismantled from the inside of a building, thus eliminating the need for any type of exterior scaffolding and the expense of erecting and dismantling it. The threaded adjustment means makes it possible to adjust the form sections to the proper horizontal spacing from inside the building. A second threaded adjustment means provides for vertical adjustment of the form sections.

Claims

1. A form apparatus for constructing a concrete building wall to extend up from the floor of the building at an outside edge of said floor without using scaffolding at the outside of the building, said form apparatus comprising:

an outer vertical form section having a lower end with an inside face for abutting engagement with said outside edge of the floor;

a pair of vertical end form sections at the opposite ends of said outer form section;

vertical pivot means at each end of said outer form section acting between the latter and the adjacent end form section for pivotal adjustment of each end form section to a position extending inward from said outer form section;

means on said outer form section near the top at each end for operatively connecting the upper end of a respective floor-mounted turnbuckle brace to said outer form section to support the latter from said floor;

elongated screw-threaded rods extending generally horizontally closely above said floor and operatively connected to said outer form section near its lower end, brackets loosely receiving said rods and attachable to said floor, and nuts threadedly engaging said rods at the inner side of said brackets for pulling and holding the lower end of the outer form section tight against the outside edge of the floor;

lower spacer sleeves loosely receiving said rods and extending inward from said outer form section;

a vertical inner form section having upwardly extending slots therein which are open at its bottom edge to slip freely over said rods at the inner end of said lower spacer sleeves;

nuts threadedly mounted on said rods outward from said brackets for holding the lower end of said inner form section against the respective inner ends of said lower spacer sleeves;

tie rods connecting said inner form section to said outer form section near their upper ends;

and means operatively associated with said end form sections for releasably locking said end form sections to said inner form section with said end form sections extending inward from said outer form section.

2. A form apparatus according to claim 1, wherein said means for operatively connecting the turnbuckle braces to said outer form section are upwardly projecting posts which are vertically aligned with said vertical pivot means at the opposite ends of the outer form section.

3. A form apparatus according to claim 1, wherein:

said inner form section has a plurality of vertically spaced, horizontal reinforcing bars at its inner side which project beyond its opposite ends;

and each of said end form sections has a plurality of vertically spaced, horizontal reinforcing bars at the outside which project beyond the side edge of the respective end form section away from said outer form section and are positioned for overlapping relationship with said projecting ends of said reinforcing bars on the inner form section;

and wherein said means for releasably locking said end form sections to said inner form section comprises;

cams on said reinforcing bars on the inner form section which are rotatably adjustable into and out of locking engagement with the outside of the respective reinforcing bars on the respective end form sections;

and cams on said reinforcing bars on each end form section which are rotatably adjustable into and out of locking engagement with the respective reinforcing bars on the inner form section at the inner side of the latter.

4. A form apparatus according to claim 1, and further comprising a vertical adjustment arrangement having:

a plurality of vertical sleeves spaced apart along said outer form section and rigidly connected to the latter;

a plurality of elongated vertical rods extending rotatably down through said vertical sleeves;

a respective nut at the lower end of each vertical sleeve threadedly engaging the corresponding rod;

a respective transverse foot on the lower end of each rod below the respective nut for engagement with a horizontal surface below the outer form section;

and a crank operatively associated with each vertical rod insertable down into each sleeve at the top for operative connection to the upper end of the respective rod to turn the latter for vertically adjusting the outer form section from inside the building.

5. A form apparatus according to claim 4, and further comprising:

an insert attached to the inner and outer form sections and extending completely across the space between them at their upper ends to mold a recess in the top of the wall across its complete thickness at its upper end for receiving a shore post-attached beam providing said horizontal surface for engagement by the transverse foot on the lower end of the correspondingly positioned elongated vertical rod in the form apparatus when the form apparatus is at the next higher floor level of the building.

6. A form apparatus according to claim 1, wherein said inner form section has a facing for forming the inner face of the concrete wall, a first set of reinforcing bars attached directly to said facing, and a second set of hollow reinforcing bars extending transverse to the bars of said first set and attached to the latter inwardly from said facing,

and further comprising means for stripping said facing of the inner form section from the concrete wall, said stripping means comprising:

nuts affixed to certain of said reinforcing bars of the second set between the reinforcing bars of the first set and inwardly from the latter;

said facing of the inner form section having openings therethrough which are aligned with said nuts affixed to said reinforcing bars;

and set screws threadedly received in said nuts affixed to said reinforcing bars and extending through the corresponding hollow reinforcing bars of the second set and between the reinforcing bars of the first set and through said openings in the facing for abutting engagement with the inner face of the concrete wall.