Segmented mold for column construction

Abstract

Semi-circular mold members are joined along abutting side edges which are beveled. A retainer on each member confines a beveled edge of a cooperating mold member preventing edge displacement and effecting a find tight joint. The mold members are closed by straps which also serve to join assembled stacked molds. Mold member lengths may be varied to provide staggered joints between stacked segments.

Description

BACKGROUND OF THE INVENTION

The present invention pertains to molds for poured concrete or other material in formation of columns.

The following U.S. patents are of interest.

U.S. Pat. No. 3,682,434 discloses a sectional form 10 for a concrete column consisting of two sections (11, 12), interlocked by joints 15, and formed of plastic. The sections may be stacked to achieve a column of greater height.

U.S. Pat. No. 3,260,493 discloses stacked form components secured by rods 60.

U.S. Pat. No. 1,282,290 discloses a column mold A comprising a shell 3 suitable for telescopic stacking, bolt holes 6, bolts F, flanges D, and a clamping ring E.

U.S. Pat. No. 3,329,747 shows member strapped together at 4.

U.S. Pat. No. 3,990,672 shows bands or straps 66 holding form halves in place.

U.S. Pat. No. 5,255,888 discloses stacked form halves

SUMMARY OF THE PRESENT INVENTION

The present mold may be formed from plastic pipe in halves with the halves provided with a retainer preventing distorting when charged with a matrix.

The upright edge of the halves are shaped to permit reinforcement when needed. Edge configuration in conjunction with the reinforcing members assure mold strength when stacked.

Objects of the mold include portability by reason of weight and the nesting of same from job site to job site.

The provision of mold with few components of low cost material and easily shaped for use as a mold.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is an elevational view of an assembled mold;

FIG. 2 is top plan view of FIG. 1;

FIG. 3 is a horizontal sectional view taken downwardly along line 3-3 of FIG. 1;

FIG. 4 is a horizontal view taken downwardly along line 44 of FIG. 1;

FIG. 5 is an elevational view of a semi-circular mold member.

FIG. 6 is an elevational view of an assembled mold using members of different lengths.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With continuing attention to the drawing wherein reference numerals indicate parts as here and after identified, the reference numeral 1 indicates an elongate mold member having a top rim 2 and a bottom rim at 3 the elongate mold members joined in pairs, as described, to form a cavity for the reception of material forming a column or post.

The present form components may be utilized in pairs to provide a segmented mold of desired height. High pressure water pipe provides a suitable base material for the formation of mold halves with such type material being available in a range of diameters. A bevel edge is formed as by length wise cutting of the pipe as typically shown in FIG. 3 and FIG. 4. Bevel surfaces at 1A and 1B extend lengthwise of the pipe at approximately 20 degrees at x, to a mold radius.

Retainers at 8 shown as plates, are secured to each half of the form by fasteners 9 which seat in drilled and tapped openings adjacent the beveled surface 1A. When so applied the retainers 8 confine the remaining end 1B of each form half against radial displacement when the completed form is charged with concrete. Retainers 8 are of rectangular configuration and substantially occupy the full length of each adjacent formed edge 1A. The retainers are tangential and terminate somewhat offset from the form end to receive the following described straps.

Steel straps at 12 encompass the periphery of joined mold components and are equipped with draw latches at 14 which serve to join opposed mold halves. Draw latches are known in the concrete trade and include a toggle locking feature. As shown in FIG. 1 strap 12 is of a width so as to extend somewhat beyond the upper ends of mold halves and bear upon superjacent mold members. Strap 12 is preferably formed with a hinge 16. While straps are shown at the upper and lower ends of a mold segment additional straps my be utilized to reinforce retainers 8 when the column being formed is of several mold segments.

The beveled edges 1A-1B lie in chordal planes defining with a radial plane P assembled form, an included angle X of between 15 and 25 degrees.

In FIG. 6 the mold halves are not of uniform length and may be staggered with straps 12 extending both about mid-portions of mold members and also about the juncture of top and bottom edges of stacked members.

Claims

1- A mold for the forming of a column including,

elongate members of arcuate section having top and bottom ends and first and second lengthwise disposed beveled edges,

a retainer on said elongate members located adjacent said first beveled edge and projecting tangentially therefrom to receive and confine said second beveled edge displacement.

2- The mold claimed in claim 1 wherein said retainer is and elongate plate.

3- The mold claimed in claim 1 wherein the first and second beveled edges lie in chordal planes of the mold when assembled.

4- The mold claimed in claim 3 wherein the chordal planes of said beveled edges intersect a radial plane of the mold to define and included angle of 15 to 25 degrees.