CA1241553A

CA1241553A - Concrete reinforcing - rod holder

Info

Publication number: CA1241553A
Application number: CA000517852A
Authority: CA
Inventors: Marcel D. Declercq
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-10-29
Filing date: 1986-09-10
Publication date: 1988-09-06

Abstract

TITLE
Improved concrete reinforcing rod holder ABSTRACT OF THE DISCLOSURE
Improvement in a concrete reinforcing rod holder com-prising hollow open-sided sections joined together so as to hold a pair of contacting reinforcing rods prior to pouring concrete to form a reinforced concrete structure, such improve-ment comprising each such section having a substantially uni-form wall thickness and a cavity having inner and outer por-tions formed therein, the center of the inner portion of such cavity being located so as to coincide with the center of the respective reinforcing rod held therein and the center of the outer portion thereof being radially offset inwardly of that of such inner portion.

Description

~2~1S53 SPECIFICATION
My invention relates to reinforced concrete and has for its principal object the provision of novel concrete rein-forcing-rod holders which serve to quickly join reinforcing rods together and securely hold them together during the pro--cess of pouring concrete.
Present practice involves joining reinforcing rod wiring them together which is time consuming and does not always produce a secure hold.
The foregoing object of my invention and the advantages thereof will become apparant during the course of the follow-ing description, taken in conjunction with the accompanying drawings, in which:

.
Figs. 1 and 2 are opposite elevational viev:s, with perts in section, of a concrete reinforcing rod holder embodying my invention;
Fix. lA is a fragmentary viev~ similzr to Fig. 1 showing a concrete reinforcing rod being inserted into a cavity of said reinforcing rod holder;
Figs. 3 and 4 are top and bottom plan views, respectively, of the structure of Fig. 1.

Referring to the drawings in greater detail, FA and FB
designate permanently joined elements or sections, re-spectively, of said reinforcing rod-holder which I herewith designate, DeClercq's "GRIPROD" holder, which term is a trademark I wish used whenever reference is made thereto. Said sections PA and FB are open sided, hollow and generally pipe shaped which a-dapts them to be fabricated of suitable plastic or resin.
Said reinforcing-rod holder can be fabricated so that the sections FA and F~ are formed simultane-ous~y in one integral assembly, preferably by injection mol-ding. The wall thickness of the section FA is identical to :~LZ~1553 that of section FB and each such wall thickness is designated C. The sections FA and FB have a single common aperture formed during the injection molding process in their common wall, as shown and indicated at X. To bet-ter hold reinforcing rods R-R in DeClercq's "GRIPROD" holder, each par-t FA or FB is formed with a cavity having differentially centered inside radii, as shown, in order to tighten the grip of said "GRIPROD" holder on the reinforcing rod R-Rheld therein. What is shown in Fig. 1 for the section FA applies also to section FB7 the center of the inner portion~of said cavity coincides with -the center of the re-inforcing rod R-R held therein. The center of t,he outer portion R2 is disposed radially inwardly of said firs-t-mentioned center by a distance Z equal to 2C; the distance Z being measured along that central diameter which bisects the open end of said cavity, as shown. the length of each part FA,FB is approximately four times that the length of either of said differential radii.

In use of DeClercq's ~'GRIPROD" holder, one section (e -ther FA orFB) is snapped over a reinforcing-rod and then a criss-crossing reinforcing-rod is snapped into the other section (PA or FB respectively)O The two reinforcing-rods held in DeClercq's it GRIPROD" holder s-ubstantially touch at their common point of tangency at the center of the common aperture/formed through the respective floors of the sections FAand FB.. In any given application, as many of DeClercq's "GRIPROD'! holders are used as there are criss-cross-ing reinforcing rods needed to be joined together prior to the pouring of the particular concrete structure to be formed.
the plurality of DeClercq's "GRIPROD" holders form and hold -the system of criss-crossing reinforcing-rods into a rigid framework ready to receive the poured concrete. When the concrete is poured, each DeClercq "GRIPROD" holder becomes embedded in the concrete with the reinforc;ng rods.

_~_ ~Z41553 he inner portion l of the cavity of each part FAor FB
extends overan arc of approximately 180 degrees, while the outer portion R2 extends over approximately 90 degrees. Thus, the outer portion Rz of such cavity is permanently formed tighter closed than the inter portion Al' whereby to increase the force of grip on the reinforcing rod R-~ held therein. Insertion of a reinforcing rod R-R into such cavity spreads apart the sides of the outér portion R2 thereof, as show in Fig. lA,and the tendency of such outer portion R2 to return to its normal re-laxed position enhances the grip on said reinforcing rod R-R.
':Ihenever mention is made herein of inserting a reinforcing rod R-R into a cavity in a "Griprod" reinforcing rod holder, it is to be understood that relative insertion is meant.
.hus if a reinforcing rod R-R is held stationary while the "Griprod" reinforcing rod holder is moved into locking en-gagement therewith, it is ccnsiderad the some a though the "Griprod" reinforcing rod holder is held stationary l~hile the reinforcing rod R-R is inserted thereinto.
It will thus be seen that there has b'een provided by my invention, novel concrete reinforcing rod holders in .lhich the object hereinafter set forth, together with many thor-oughly practical advantages, has been successfully achieved.
~'lhile preferred embodiments of my invention have been sho~qn and described, it is to be understood that variations an changes may be resorted to without departing from the spirit of my invention as defined by the appended claims.

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. Improvement in a concrete reinforcing rod holder com-prising hollow open-sided sections joined together so as to hold a pair of contacting reinforcing rods prior to pouring concrete to form a reinforced concrete structure, said improve-ment comprising each said section having a substantially uni-form wall thickness and a cavity having inner and outer por-tions formed therein, the center of the inner portion of said cavity being located so as to coincide with the center of the respective reinforcing rod held therein and the center of the outer portion thereof being radially offset inwardly of that of said inner portion.

2. Improvement in a concrete reinforcing rod holder as claimed in claim 1 in which said radial offset is along a central diameter which makes a 45 degree angle with an out-side edge of said cavity.

3. Improvement as claimed in claim 2 in which said rad-ial offset is equal to one-half of said wall thickness.

4. Improvement as claimed in claim 1 in which there are two sections disposed at right angles to each other so as to hold a pair of criss-crossed reinforcing rods.

5. Improvement as claimed in claim 1 in which said sections mutally intersect and form a through aperture through the common wall between them, the pair of rein-forcing rods held in said holder contacting each other through said aperture.