GB2190938A

GB2190938A - A wall tie with bearing function for insulating material

Info

Publication number: GB2190938A
Application number: GB08712452A
Authority: GB
Inventors: Johan Carel Van Der Lippe
Original assignee: BODEGRAVEN BV
Current assignee: BODEGRAVEN BV
Priority date: 1986-05-27
Filing date: 1987-05-27
Publication date: 1987-12-02
Anticipated expiration: 2007-05-27
Also published as: GB8712452D0; DE3717563A1; GB2190938B; DE3717563C2; NL191949B; NL8601353A; NL191949C; BE1000061A6

Description

GB2190938A 1 SPECIFICATION tween two adjoining transverse grooves situ

ated at the bottom of the end portion is an A wall tie with bearing function for insulat- excellent drip former providing a proper mois ing material ture discharge in the air gap between the in 70 ner wall of the outer cavity leaf and the sur This invention relates to a wall tie with bear- face of the insulating material facing said wall.

ing function for insulating material to be fitted One embodiment of the wall tie according within a cavity, said wall tie including a flat to the present invention will now be de strip having anchorage means, said strip being scribed, by way of example, with reference to placeable in a joint of an inner cavity leaf, a 75 the accompanying drawings, in which:

rounded central portion linking up therewith Figure 1 is a bottom view of the wall tie; and an end portion adapted for anchorage in a Figure 2 is a side view of the wall tie joint of an outer cavity leaf. shown in Fig. 1, provided in an inner and A similar wall tie is known from Dutch pa- outer cavity leaf, with a layer of insulating ma- tent 160,901. its end portion, which can be 80 terial being pushed on the wall tie; placed in a joint of an outer cavity leaf, is flat Figure 3 is a cross section on the line 111-111 and relatively wide. The outer edge regions of of Fig. 1; and said end portion form expandable lips continu- Figure 4 shows a wall tie disposed in in ing on either side along the rounded central terior walls of different thicknesses.

portion into the flat strip which is placed in a 85 The wall tie comprises a flat strip 1 which joint of an inner cavity leaf. This known wall merges into a central portion 5 curved into a tie is excellently suitable for relatively soft and tubular strape and an end portion 6. The flat easily pierced insulating materials, such as strip 1 is provided with anchoring means 2, 3 glass wool bats. With relatively hard insulating consisting of indentations 2 and half-round materials, problems occur, since the point of 90 edge cut-outs 3. Said anchoring means 2, 3 the end portion is too wide and cannot easily impart a high pull value to a flat strip 1 of the cut through the hard insulating material. When wall tie embedded in an inner cavity leaf.

sliding such an insulating material over the The end portion 6 of the wall tie cross wall tie, there is produced a substantial sliding sectionally has substantially the same form as resistance, so that it is difficult to further slide 95 the tubular central portion 5 but is slightly the insulating material over the wall tie until flattened for end portion 6 to be received said material abuts against the cavity-facing more easily in a joint 10 of the outer cavity wall of the inner cavity leaf. When fitting insu- leaf 14. The height of the end portion 6 is lating material on this known wall tie, this is less than the diameter of the tubular central subjected to a buckling load in axial direction. 100 portion 5. The bearing function of the wall tie The buckling value of the fiat end portion of is provided by central portion 5 and, possibly, the wall tie appears to be low, at least in the a short region of end portion 6 linking up case of hard insulating materials. therewith, depending on the thickness of the It is an object of the present invention to insulation. Insulating layer 12 must not fill up provide a wall tie with which these drawbacks 105 the cavity entirely; an air gap 13 of 2-3 cm are overcome. The wall tie according to the should be left for ventilation and dewatering.

present invention is characterized to that ef- To prevent water entering through the external fect in that the end portion is flattened from wall from penetrating the inner cavity leaf an initafly rounded form in a direction perpen- through the wall tie, end portion 6 is flattened dicular to the plane of the flat strip, while 110 in a particular manner by providing therein equidistantly spaced, and transversely extendtransverse grooves 7 at the top and corre ing grooves are provided in the flattened end sponding transverse grooves 8 at the bottom portion at the top and bottom, the grooves at of the end portion. Transverse grooves 7, 8 the bottom being off-set by half a pitch dis- lie at equidistant pitch distances, while the tance with respect to the grooves at the top. 115 grooves 8 in the bottom are off-set by half a As a result of the bent central porton and pitch distance with respect to the grooves 7 the flattened, corrugated end portion, the wall situated at the top. Between two adjacent tie, instead of being a relatively broad flat grooves, there is thus formed a spherical sur strip, now has the form of a sharp point that face functioning as a drip former and ensuring can easily pierce relatively hard insulating ma- 120 that moisture drops, if any, are discharged terials. The sliding resistance has been re- into the air gap and do not run via the wall tie duced considerably, while the buckling value in the direction of the inner cavity leaf 11.

of the end of the wall tie has been increased Grooves 7, 8 further ensure a proper anchor substantially in axial direction. Moreover, there ing of end portion 6 in joint 10 of the outer is minimal damage of the insulating material 125 cavity leaf 14, so that end portion 6 of the due to the sharp point. wall tie also has a high pull-out value.

Due to the flattened, corrugated form of the Fig. 3 shows a detail of the anchorage in end portion, this is still sufficiently thin for it the inner cavity leaf. Inner cavity leaves usu to be received in a cement joint of an outer ally consist of sandlime brick blocks glued cavity leaf, while the spherical surface be- 130 onto each other. The thickness of the glued 2 GB2190938A joint is about 2 mm. The thickness of the wall tie at the indentation 2 is 1 mm. The flat end portion 1 of the wall tie is placed on an adhesive strip, with some adhesive penetrating through an opening into the indentation 2, thereby forming a drop 15. By placing the next sandlime brick block, the drop of adhesive 15 is flattened and the indentation 2 is filled entirely with adhesive.

Fig. 4 shows four wall ties disposed in inner cavity leaves of different thickness and construction. This thickness is minimally 100 mm and maximally 150 mm. The length of the flat strip 1 of the wall tie is 90 mm, so that the glued joint is filled practically entirely at minimum thickness of the cavity leaf and still for more than half at maximum thickness of the cavity leaf in the direction of said wall tie. Owing to this length, the possibility of tilting of the sandlime brick block placed on the wall tie in a direction transverse to the wall tie has been removed. Due to the long length of the flat stip 1, the wall tie can also be used with sandlime brick blocks having a protrusion 16, so that the necessity to use wall ties of differ- ent length for different inner cavity leaves is considerably reduced.

Claims

1. A wall tie with bearing function for insu lating material to be fitted within a cavity, said wall tie comprising a flat strip having anchor age means, said strip being placeable partly in a joint of an inner cavity leaf, a rounded cen- tral portion linking up therewith, and an end portion adapted to be anchored in a joint of an outer cavity leaf, characterized in that the end portion (6) is flattened from an initally rounded form in a direction perpendicular to the plane of the flat strip (1), while transversely extending, equidistant grooves (7,8) are provided in the flattened end portion (6) at the top and bottom, the grooves (8) situated at the bottom being off- set by half a pitch distance with respect to the grooves (7) situated at the top.

2. A wall tie as claimed in claim 1, characterized in that the anchorage means of the flat strip have indentations (2) provided with a central opening.

Printed for Her Majesty's Stationery Office by Burgess & Son (Abingdon) Lid, Dd 8991685. 1987. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 'I AY, from which copies may be obtained.