Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G25/00—Shores or struts; Chocks
  • E04G25/04—Shores or struts; Chocks telescopic
  • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G25/00—Shores or struts; Chocks
  • E04G2025/006—Heads therefor, e.g. pivotable

Definitions

• the invention relates generally to concrete form apparatus and, more specifically, to spring assembly of a reshore post component of concrete form systems that retains the reshore post in its upright position upon unloading of the reshore post during disassembly of the concrete forms.
• Concrete forming apparatus is in wide use in the construction of buildings, bridges, and other concrete structures.
• a common system for forming concrete structures uses a plurality of modular form components that are adapted to be assembled into a wide variety of configurations to conform to virtually any architectural requirement.
• Such forming apparatus components are typically made of metal so that they are strong enough to support the heavy weight of poured concrete and durable so that the components can be reused many times.
• the preferred embodiment of the present invention consists of a spring assembly of a metal reshore post used in concrete forming apparatus that will hold the reshore post in its upright position even after the load on the reshore post has been released.
• the assembly includes a spring that is releasably attached to an end plate secured to an end of the reshore post.
• the spring has a pair of clips that engage notches in the end plate to releasably secure the spring to the end plate.
• a variety of end plates may be used provided that appropriately spaced notches are formed in the plate.
• an end plate attached to what is most often the bottom end of the reshore post is of a different configuration from the end plate attached to the other end of the reshore post. The difference in configurations allows the reshore post to be used in both orientations in order to adapt to a larger variety of heights between floors.
• An object of the present invention is to provide a spring assembly for metal reshore posts of concrete forming apparatus that continues to support the reshore post in an upright position after release of a load on the reshore post.
• Another object of the present invention is to provide a spring assembly for metal reshore posts of concrete forming apparatus that may be releasably attached to either end of the reshore post.
• FIG. 1 is an elevational view of a reshore post representing a preferred embodiment of the present invention.
• FIGs. 2a-d are schematic representations of four typical construction phases of a multi-story concrete structure showing the use of shores and reshores.
• FIG. 3 is an enlarged perspective view of an end plate of a preferred embodiment of the present invention.
• FIG. 4 is an enlarged perspective view of an end plate of an alternative preferred embodiment of the present invention.
• Fig. 5 is an enlarged perspective view of leaf spring of a preferred embodiment of the present invention.
• Fig. 6 is an enlarged view of the upper end of the reshore post of Fig. 1 showing the leaf spring attached to an end plate.
• a reshore post representing a preferred embodiment of the present invention.
• the reshore post 10 includes an outer telescoping tube 12, an inner telescoping tube 14, a bottom end plate 16, a top end plate 18, and a leaf spring 20.
• the shore post 10 may be adjusted in length by telescopic movement of the inner tube 14 inside the outer tube 12.
• the shore post 10 may be set at a plurality of adjusted lengths by use of a pin 22 that is inserted into a pair of diametrically opposed holes 24 in the outer tube 12 and a selected pair of a plurality of holes 26 in the inner tube 14 spaced at a regular interval. Fine adjustment of the length of the shore post 10 is made by rotation of a threaded linkage member 28.
• the reshore post 10 is used in the construction of concrete structures, for example multi-story concrete buildings.
• Shore posts are also typically used. Shore posts may take a large variety of configurations.
• suitable shore posts may be identical to the reshore post 10 with the exception that the leaf spring 20 is not used. Rather, the top end plate 18 is used to secure a different component of formwork, such a s a drop head, support beam, form panel, or the like.
• a floor 30 is formed using reshore posts 10 supporting two lower stories and shore posts 32 and formwork 34 on which the slab of the floor 30 will be formed (Fig. 2a).
• the shores 32 and formwork 34 are removed (Fig. 2b). Frequently, the fresh concrete slab 30 will deflect or sag under its own weight. To pour the next floor, it will be necessary to install shore posts and formwork on the most recently poured floor slab 30, the strength of which may not be sufficient to support the load that will be imposed. To support further the most recently poured floor slab 30, the reshore posts 10 are cycled by removing them from two floors below (Fig. 2c) and installing them on the floor beneath the most recently poured floor 30 (Fig. 2d).
• the reshore posts 10 be installed snugly under the slab or floor to be supported but relatively load free. Accordingly, the reshore posts 10 are adjusted to the approximate length that will allow the reshore 10 to be stood upright in position by use of the pin 22 in association with aligned pairs of holes 24 and 26, as described above. Once positioned, the height may be finely adjusted by turning of the threaded linkage member 28 to bring the leaf spring 20 into contact with the bottom of the floor to be supported and compressed sufficiently to hold the reshore post 10 in its upright position.
• the floor 30 is expected to deflect, further compressing the spring 20 until, most commonly, the floor 30 will be supported effectively on the top end plate 18.
• the top end plate 18 of a preferred embodiment has a generally rectangular shape (Fig. 3). Notches 36 and 38 are formed in opposite sides of the end plate 18.
• the bottom end plate 16 is substantially U-shaped in cross section, having a web 40 that is similar in shape to the top end plate 18, and a pair of flanges 42 and 44 formed on opposite sides of the web 40 (Fig. 4).
• the bottom end plate 16 is formed of a plate of steel that is bent to form the web 40 and flanges 42, 44. Rectangular holes 46 and 48 formed at the juncture of the web 40 and the flanges 42 and 44, respectively, form notches 50 and 52 upon bending of the bottom end plate 16.
• the spring 20 of a preferred embodiment includes a flat web section 54 from either side of which extend outwardly and upwardly a curved spring section 56 and 58.
• Spring clips 60 and 62 are formed at opposite ends of the web section 54.
• the clips 60 and 62 include an in-turned end portion 64 and 66, respectively.
• the spring 20 is releasably attached to the top end plate 18 by aligning spring clips 60, 62 with the notches 36, 38 and pressing the web section 54 into contact with the end plate 18.
• the in-turned end portions 64 and 68 engage the underside of the top end plate 18 to retain the spring 20 on the top end plate 18. If desired, the spring 20 can be readily removed by pulling outwardly on the spring clips 60 and 62.
• the spring 20 may be releasably attached to the bottom end plate 16 by use of the notches 50 and 52.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
• Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38683785

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (6)

• 2006
  • 2006-05-12 US US11/433,658 patent/US20070261338A1/en not_active Abandoned
• 2007
  • 2007-05-11 WO PCT/US2007/011425 patent/WO2007133692A2/en not_active Ceased
  • 2007-05-11 MX MX2008013721A patent/MX2008013721A/es active IP Right Grant
  • 2007-05-11 CA CA002650278A patent/CA2650278A1/en not_active Abandoned
  • 2007-05-11 EP EP07794797.6A patent/EP2019884A4/de not_active Withdrawn

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