GB2268762A - Variable interengageable two-part wall tie - Google Patents

Abstract

A two part variable interengageable wall tie. The inner component 1 is rigid once built in and extends into the cavity a spigot 2 that falls outward away from this inner skin terminating in a drip. Incorporated in this is a series of variable part couplings, e.g. holes 3, ready to receive the outer component 5. This will incorporate a corresponding section 7 that will interengage into one of the variable part couplings 3 of the inner component. The outer component is bent, 6, to offer a variation of height of up to one course above or below that of the course work of the inner skin by simply turning it over. The building-in section, 5, is malleable to accommodate the final laying into the external joint. The spigot section will easily receive some form of clip over spacing device to retain cavity wall insulation. Interengagement may be by T-bar and socket, or screw-thread and nut, or wire passing through holes; see Figs. 2 to 28. <IMAGE>

Description

Variable Interengageable Cavity Well Tie This invention relates to a two-part variable wall tie, intended for use to bond together skins of various cavity walls.

Many forms of cavity wall ties are available to-day, all to suit different requirements of cavity wall construction. Few of these will cope well with variations from their intended design use.

If inserted incorrectly they will invariably lead to many problems, including poor wall stability, breaches in insulation, cold spots and allow damp penetration across the cavity to the internal skin.

According to this present invention the two components interengageable wall tie will structurally bond together infinitely variable type, over all wall, cavity and skin thickness. It will satisfactorily retain and allow for most common forms of cavity wall insulation either partially or fully filled cavity construction. Also it will build in and allow for differential bed joints across the cavity of up to half of one course of brickwork higher or lower, or will adapt to face fix to the outer face of the internal skin.

Through all the variations it will drip any water penetrating into the cavity back to the outside skin.

The principle concepts of this new design are the inner component of the tie is rigid enough to always be built in or face fixed to the internal skin and provide a spigot extending across the cavity tending to slightly fall outwards terminating in a form of water drip. It must also include a positive variable receptive part coupling method to interengage the outer component.

This coupling method must be able to transfer and resist all necessary stress and loads from one skin to the other while accommodating all variations of angle ena position.

The outer component of the tie will readily be able to interengage to the inner component in a rigid but variable coupling method, and accommodate different bed joint levels. The final building in section of the outer component should be malleable enough to allow for slight adaption to lay level into the bed joint.

A specific embodiment of the invention will now be described by way of examples with reference to accompanying drawings/figures.

Fig. 1 shows the two component interengageable design, the internal component is in the example manufactured from galvanised steel.

It incorporates a building in split fish tail, 1, and a rigid section slightly bent downwards, 2. From the horizontal a series of three or more reamed round holes, 3, all terminating at the lowest point with a water drip, 4. The building in Part 1 could and will be substituted for various alterations in later figures. The external component incorporates a malleable building in wire, 5, common to the butterfly wall tie, welded or fixed to a bent rigid section, 6, incorporating a steel dowel, 7, welded or fixed in position of suitable diameter to interengage into one of the reamed holes, 3, in the first component.

Fig. 2 shows a typical installation of the wall tie. In this example the course work of the internal blockwork, 8, is out of level to that of the external brickwork, 9, by half of one course of brickwork. The outer component of the wall tie is adjusted by slight bending of the malleable wire, 5, then interengaged by means of the steel dowel, 7, into one of the holes, 3, of the inner component. This dowel, 7, is so positioned to offer restraint to the partially filled cavity insulation, 10. The outer component can now be built in solid to the brickwork, 9, nearest bed joint half of one course below that of the internal skin.

Fig. 3 shows the wall tie used in a wall where the external brickwork, 9, nearest bed joint is approximately one-third depth of brick course work above that of the internal skin, 8. The external component of the wall tie is utilised the other way up, slightly adjusted to the malleable wire, 5, interengaged and built in, as previously described. This illustration shows a fully filled cavity insulation. The drip section, 4, of the ties will allow for this and discharge any dampness towards the external skin, 9.

Fig. 4 shows an alternative internal component, 12. This may be surface fixed to the external face of the internal skin of the wall, 8.

This could be virtually any form of construction, including masonry or timber framed, the spigot, 2, section of the tie again slope downwards away from the internal skin, interengagement and building in of the outer component is as before described.

Fig. 5 shows sketch of the alternative internal component, 12.

Figs. 6, 7, 8 and 9 illustrate other forms of internal component, utilising the same basic principle.

Figs. 13, 14 and 15 show sketch sections of the interengagement in three various positions. The reamed holes, 3, steel dowel, 7, and malleable building in wire, 5, are coupled up and adjusted to deal with the circumstances of each situation. A rot-proof wedge, 12, could be utilised to retain partially filled cavity insulation, 10, and simply inserted through a suitable spare hole, 3, as in Fig. 15.

Figs. 16 and 17 illustrate a variation to the interengagement basic principle, this offers a more certain mechanical contact between the two components. It replaced the dowel with a threaded stud, 13, also introduces some form of a nut, 14, and possible two rounded conical spacers, 15, to self centre to the reamed holes, 3, and when the nut, 14, is tightened will lock the coupling firmly together, the other components of the ties could be of any form previously illustrated or suitable alternative.

Fig. 18 shows a further alternative form of interengageable coupling. The internal component incorporates in lieu of the reamed holes a series of perforated flanges, 16, cut and bent upwards from the rigid section, 2, to drop over and fit which ever is suitable, a special thread "U" section nut, 17, is introduced, through this nut, 17, and flange, 16, a threaded tail, 18, of the outer component of the tie is inserted and screwed in, the perforation through the flange, 16, is larger than that of the threaded tail, 18, therefore it will accommodate great flexibility when being coupled up.

Fig. 19 shows a section through coupling method illustrated in fig. 18. The internal and external fixing or building in parts of the tie would be as previously described.

Figs. 20 and 21 illustrate another alternative to the interengageable coupling, this is achieved by bending up pegs, 19, from the rigid section, 2, of the internal component. To couple on to these the rigid section of the outer component has a small slot, 20, to drop over the peg and again interengage the coupling and allow flexibility of the angles. Again a simple wedge, 12, will retain any partially filled cavity insulation.

Figs. 22 and 23 illustrate another alternative interengageable coupling. This involves rectangular slots, 21, across the rigid section, 2, of the inner component. Into this a key bit, 22, rectangular shape is attached to the bent rigid section, 6, of the outer component, the other component is then turned through 900 to lock the key bit to the coupling, all other details are as described before.

Figs 24 and 25 illustrate a variation to that of figs. 20 and 21, where the pegs, 19, are replaced by stub round pegs, 23, attached to the rigid section, 2, and the end of the outer component, 6, simply becomes a ring, 24, to drop over them.

Fig. 26 illustrates another alternative. The rigid section incorporate turned up flanges that form rounded slots, 25, for a "T" bar end, 26, of the rigid section of the outer component to drop down and slide sideways. Then the building in section, 5, is turned down approximately 900 to lay into the bed joint of the external skin, all other details are as before described.

Fig. 27 illustrates a further variation. In this alternative the rigid section of the inner component is formed into a "U" shaped channel, 27, equally perforated with round holes to each side, 28. The interengagement is again made by a "T" bar, 26. This is first inserted to one side hole, 28, levelled up and slid back into the other side.

The building in section is now turned down through 900 approximately onto the bed joint, and the "T" bar is self centred to the channel by the enlarged rounded section, 29, of the outer component. Cavity insulation may be restrained by utilising the holes for wedges, clips or dowels, 30.

Fig. 28 shows my final suggestion for the interengagement. Many combinations/variations to all the alternatives are obviously suitable providing they can be interengaged to suit various wall, cavity and skin thickness and type. Also the internal component must slope outwards terminating in a drip and be rigid enough so as to always achieve this when built in or fixed. It in itself will offer support to any cavity wall insulation and suit various thickness, the outer component will easily interengage to the inner and be able to easily adapt to a differential of bed joint height of up to half of one brick coursework lower or higher. This alternative utilises a similar "U" shaped channel, 27, as Fig 27 with holes, 28, to each side.The locking in coupling method of the outer component consists of two bent outward wire ends, 31, not twisted together but laying side by side, 32, and due to the springiness of the malleable section 5, of the outer component, they will tend to spread. The interengagement is achieved by simply grasping the outer component, 5, into one hand deciding the way up it is to be used and slightly nipping it to allow the two wires, 32, to slip one over the other and the bent ends to be able to be engaged to any pair of suitably positioned side holes, 28, of the trough, 27, on relaxing the grip the free ends will tend to spread apart and make this engagement.

The final minor bending and adjustment to the outer component, 5, can be completed to allow it to lay perfectly in the outer bed joint as it is built in.

Figs 29 and 30 show two suggestions for alternative forms of plastic retaining devices to locate and hold cavity insulation in the required position. Many other devices similar to those in common use to-day, would also suffice.

Claims (16)

1. A wall tie for tying the inner and external skin of a cavity wall together. Wherein the wall tie comprises two components, the inner component will be rigid once built in and offer a spigot sloping downwards and outwards across the cavity, terminating in some form of drip detail.

It will incorporate an interengageable variable part coupling to link positively to the outer component.

That once coupled can be built into the external skin of the wall.

2. A wall tie arrangement according to Claim 1 wherein the outer component has a stiff coupling method to join up to the inner component leading through a bent malleable section to a slightly bent external building in section, the whole outer component is reversible and adaptable to accommodate a difference in bed joint levels of up to half of one normal course of brickwork above or below the internal.

3. A wall tie arrangement according to Claim 1 and 2 wherein the inner component can be face fixed to the outer face of the internal skin whatever its nature after it is constructed.

4. A wall tie arrangement according to Claims 1, 2 and 3, wherein the coupling method is in the form of a flat bar for the outward facing spigot of the internal component with circular waisted holes through to receive 0 a peg, bolt or dowel of the outer component at 90 to the bar or many variations of angle to that when coupled up.

5. A wall tie arrangement according to Claims 1, 2 and 3 wherein the coupling method is in the form of a flat bar for the outward facing spigot of the internal component with pegs or pins of any shape projecting upwards to receive a corresponding shaped orifice to the outer component when coupled up.

6. A wall tie arrangement according to Claims 1, 2 and 3 wherein the outer facing spigot of the internal component takes the form of a trough with a series of round holes through each side opposite each other at pre-determined centres to receive a round "T" bar or turned out ends from the outer component.

7. A wall tie arrangement according to Claim 6 wherein the "T" bar is fixed to the outer component in such a way an eccentric reversible cam is formed in relation to that bar, thus the outer component on coupling and turning downwards to build into the external skin must centralize and lock itself to the trough spigot of the inner component.

8. A wall tie arrangement according to Claim 6 wherein the outer component is formed in wire and couples to the inner component through the free ends of the wire being bent sideways to form two "L" shapes.

9. A wall tie arrangement according to Claim 8 wherein the outer component is so produced the "L" shaped free ends tend to spring apart.

10. A wall tie arrangement according to Claim 9 wherein the free end of the outer component may be nipped slightly to pass one free end over the other.

11. A wall tie arrangement according to Claim 10 wherein once the free ends are nipped and slide past each other they may be positioned to line with any pair of corresponding holes in the sides of the trough spigot of the inner component.

12. A wall tie arrangement according to Claim 11 wherein once the "L" shaped free ends are suitably lined up they may be released from the nipping force and will tend to spring outwards to each side and allow the "L" shaped free ends to engage in the sides of the trough spigot, through suitably positioned holes.

13. A wall tie arrangement according to Claim 12 wherein once the "L" shaped free ends are located, the outer component can be slightly adjusted to locate and lay in the suitable bed joint ff the external skin as it is built.

14. A wall tie arrangement according to Claims 1 to 13 wherein an extra device can be attached to the spigot of the inner component to retain cavity wall insulation as may be required while building in.

15. A wall tie arrangement according to Claim 14 wherein the extra device to retain cavity insulation can be attached too by sliding over the spigot and or will locate to any hole or protrusion to stabilise its position.

16. A wall tie arrangement as herein described with reference to and as illustrated in the accompanying drawings.