HK1077861B

HK1077861B - A connector for steel reinforcement

Info

Publication number: HK1077861B
Application number: HK06100262.5A
Authority: HK
Inventors: 欧内斯特．科默福德; 歐內斯特．科默福德
Original assignee: Adjusta Pty Ltd.
Priority date: 2002-01-21
Filing date: 2003-01-20
Publication date: 2007-11-02
Also published as: WO2003062552A1; AU2003201395C1; EP1483463A4; CN1636101A; CN1327095C; US20050044805A1; EP1483463A1; JP2005515334A; HK1077861A1; AU2003201395B2; AUPS004802A0

Abstract

An anchor for embedding into a concrete slab and to which fittings may be secured. The anchor has a housing with an access opening and a base opening, a cover adapted to normally close off the base opening, a fastener carriage, a fastener held by the carriage, a carriage support and a cap. The fastener carriage, fastener, cap and carriage support may rotate as a unit relative to the housing and the fastener may move across the housing.

Description

Steel bar connector

The invention relates to a steel bar connector.

The invention will be described by way of example with reference to the construction of concrete floors or ceilings in multi-storey concrete buildings. It should be appreciated that this is by way of example only, and that the connector of the present invention may be adapted for other uses.

Background

In the construction of concrete multi-storey buildings, the walls are first cast. Formwork is used and reinforcing steel is placed in the formwork, along the height of the wall where the floor or ceiling is to be constructed, and a trough under the trade name "REBOX" is placed and embedded in the resulting concrete wall. Each REBOX is formed by a slot that can be sealed at both ends and has a cap that contacts the template to seal the REBOX. Thus, concrete is prevented from entering the REBOX when the wall is formed.

Each REBOX has a plurality of lengths of rebar that project into the space where the wall is to be formed and are tied or otherwise secured to the wall rebar. The rebar length also projects into the REBOX and is aligned within and extends along the channel formed by the REBOX.

After the walls have been cast and the forms removed from the walls, the floor and ceiling must be cast. The form panels are positioned adjacent the cavity formed by the channel-like REBOX, in which case the worker must manually deform the rib segments from their position in the cavity or channel into the REBOX so that they project outwardly therefrom and can be tied or secured to the reinforcing bars of the floor ceiling and then pour the panels which will form the floor ceiling.

Deforming the rebar is cumbersome and difficult because the work must be done quickly and the location of the rebar next to the floor and ceiling form is awkward. Bending the ribs in this way can lead to metal fatigue and thus to a loss of strength in the resulting building.

Disclosure of Invention

It is an object of the present invention to provide a reinforcing bar coupler which at least reduces the inconvenience referred to above.

In one aspect, the present invention provides a connector for reinforcing bar having a body for securely receiving an end of a length of reinforcing bar and a head for seating on and relative to the reinforcing bar projecting from a wall of a building.

The head is preferably configured as a hook that can be placed in position on a rebar located within a REBOX. Preferably, a retainer is carried by the hook which helps to retain the hook on the reinforcement in the REBOX.

The body may include a cavity for receiving an end of a length of rebar. Preferably, the body is formed by a plurality of parts which can be clamped or clamped to each other and which collectively form the above-mentioned chambers.

There are typically ribs or formations on the outer surface of the rebar and preferably the inner face of the cavity provided by the body has complementary formations for receiving formations on the rebar length.

This facilitates the connection between the length of rebar and the body.

Preferably, the body is formed from two parts or halves which can be secured to one another to grip one end of the reinforcing bar between them.

Preferably, an inner end of the cavity is enlarged to be larger than the remainder of the cavity in the body. This ensures that it is readily possible to receive an end of a length of rebar even if the free end of the length of rebar has a deformed cavity. There is often distortion when a desired length of rebar is cut from a longer length of such material.

When the body is formed of two parts, they may be clamped to one another by one or more connectors. The connector may be a ferrule. The connector may comprise pins projecting from one part of the body and the other part of the body may have corresponding holes for receiving the pins. The free ends of the pins can be deformed to lock the body parts to one another, acting as rivets. Preferably, the body member with the aperture may be provided with a recess for receiving the deformed end of the pin.

Alternatively, the pins may be relatively short for positioning one part relative to the other, and a ferrule-like holder may hold the two parts relative to each other.

Drawings

A particularly preferred embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is an exploded perspective view of a connector according to this embodiment of the present invention;

FIG. 2 is a perspective view of the connector of FIG. 1 in an assembled state;

FIG. 3 is a perspective view of the connector of FIGS. 1 and 2 shown in situ attached to wall rebar;

FIG. 4 is an exploded perspective view of a connector according to another embodiment of the present invention;

FIG. 5 is a perspective view of the connector of FIG. 4 in an assembled state;

FIG. 6 is a perspective view of the connector of FIGS. 4 and 5 shown in situ attached to wall rebar;

FIG. 7 is a perspective view of a connector according to another embodiment of the present invention;

figure 8 is a longitudinal cross-sectional view of the connector of figure 7.

Detailed Description

Fig. 1 illustrates a connector 10 according to an embodiment of the present invention. The connector 10 has a body 12, 13 and a head.

The body is formed from parts 13, 12 which together define a cavity 14 for receiving an end of a length of reinforcing bar.

The head 11 has a slot 18 giving the head a hook-like appearance which can be hooked over reinforcement projecting from a concrete wall.

The body member 12 has a connector 16 extending from the body. The body part 13 has a hole 17 for receiving the element 16, and the element 16 is deformable so that the parts 12, 13 can be clamped to each other. The inner surface of the cavity may have complementary formations to those of the ends of the lengths of rebar so that once the ends are received in the cavity and the parts 12, 13 are clamped to each other, the ends cannot be pulled out of the cavity. The inner end of the cavity may be enlarged in size.

Figure 2 of the drawings shows the connector 10 in an assembled state before deformation of the member 16.

Fig. 3 shows the connector 10 positioned within a channel shaped REBOX 22. The REBOX has two side flanges 23, 24 and is recessed into the wall 26. The rebar 21 is arched into the recess formed by the REBOX22 and back into the wall 25 where it is tied or connected to the rebar in the wall 25 prior to casting of the wall. The rebar 21 is received within the channel 18.

The connector 10 allows a length of rebar 20 to be gripped by the body parts 12, 13 once the two parts clamp each other when deforming the piece 16. The formations and rebars 20 are not depicted.

The rebar 20 may be tied or connected to rebar that will form a part of a floor or ceiling that extends into the recess provided by the REBOX 22. Thus, a floor ceiling can be produced without first bending the reinforcing bars extending from the REBOX as in the conventional case.

The connector 40 of fig. 4 has a body 41 made of two parts 42, 43. Member 42 has an alignment hole 44 and member 43 has a boss pin (not visible) that is received in hole 44 to align the two parts relative to each other. With the connector installed, the members 42, 43 form a cavity 45 for receiving an end of a length of rebar. The inner surface of the cavity 45 may be configured to match the profile of the rebar. The end 46 of the cavity is enlarged to accommodate any deformation of the ends of the rebar.

The body 41 has a head 51 provided with a slot 51.

A ferrule 52 with a tapered through hole 53 is adapted to be threaded onto the members 42, 43 to clamp them together.

Fig. 5 shows the connector in an assembled state.

Fig. 6 shows a concrete arm 60 in which a REBOX having a connecting wall 61 and two opposing flanges 62, 63 has been inserted. The rebar 64 arches into the space within the REBOX and extends into the wall 60. Those portions of the rebar that extend into the wall are tied or connected to the rebar on the wall prior to pouring the concrete into the wall.

Preferably, the receiving slot 18(51 or 73) of the head is configured such that an inner face thereof is curved to match the curvature of the inner edge of the reinforcing bar 64. In addition, the head extends entirely across the aperture defined by the rebar 64.

Fig. 7 shows a connector 70 having a body 71 and a head 72. The head 72 has a receiving groove 73 giving the head a hook-like shape. A cavity 74 extends within the body 71 and is adapted to receive an end of a length of rebar.

As shown in fig. 8, the chamber wall is provided with a thread-forming formation. One end of the length of rebar can be formed with a corresponding thread formation and threaded into the cavity to engage the connector.

The connector 40 securely receives and holds a length of rebar 65, and the channel 51 receives the rebar 64. The rebar 65 may be tied or otherwise attached to the floor/ceiling rebar and the connectors with the rebar 65 are placed into the floor/ceiling while the floor/ceiling concrete is poured and has cured. In this way, the floor/ceiling can be reliably attached to the wall without bending the reinforcing bars as is the case in the prior art.

Claims

1. A connector for reinforcing bars, the connector having a body for securely receiving an end of a length of reinforcing bar and a head for seating on or relative to the reinforcing bar arched from a building wall.

2. The connector of claim 1, wherein the head is configured as a hook that seats on rebar arching from a wall.

3. A connector according to claim 1 or claim 2, wherein the body has a cavity for receiving the end of the length of reinforcement.

4. A connector as claimed in claim 3, wherein the cavity is provided with a threaded portion adapted to threadedly engage the end of a length of reinforcing bar.

5. A connector as claimed in claim 3, wherein the body is formed from a plurality of parts which are clampable against one another to collectively form the cavity.

6. A connector as claimed in claim 3, wherein an inner face of the cavity has formations for receiving formations on the length of reinforcement.

7. A connector according to claim 5, wherein the body is formed from two parts which are clampable against one another to grip the end of the reinforcing bar therebetween.

8. A connector as claimed in claim 3, wherein the inner end of the cavity is enlarged relative to the remainder of the cavity.

9. The connector of claim 7, wherein two parts are held together with one or more connecting members.

10. A connector as claimed in claim 9, wherein the connector is a ferrule adapted to extend over the body parts to thereby clamp the parts to one another.

11. The connector of claim 10, wherein the ferrule has a tapered bore.

12. A connector as claimed in claim 9, wherein the connecting member is a pin projecting from one of the parts and the other part has a hole for receiving the pin, the pin being deformable to lock the parts to one another.

13. The connector of claim 6, wherein the interior of the cavity is provided with a threaded portion for receiving the length of reinforcement in threaded engagement.