Fixation plate for insulation in a hollow wall

Description

[0001] The invention relates to a substantially disc-shaped plastics plate to be pressed on a cavity wall tie used for retaining an insulation blanket against the inner wall of a cavity wall, said disc being provided with a central opening forming a seat for a wall tie and communicating with a slot, bounded by upstanding rims, extending up to the outer rim of the disc, through which the wall tie can be moved towards the seat when pressing the disc on a tie, which central opening is surrounded by an annular lug forming part of the disc and stiffening the latter but being elastically deformable, said lug being interrupted at the slot.

[0002] Such a retaining disc is known from NL-A-76 09 119 of the same applicant. This known disc can be pressed on a wall tie which has already been fixed in the inner and outer walls, so that only forces which can be taken up by the underlying brick layer will be exerted thereon without pulling the tie from the still unhardened mortar.

[0003] Such a disc can be placed on a tie closely to an insulation blanket which, during brick laying, is put on the ties, and consists, for instance, of glass wool, if desired provided with aluminium foil, said disc thus retaining the blanket against shifting. An obliquely extending circumferential rim of the disc joining, as the case may be, upstanding rims extending along the insertion slot up to the central lug, ensures that condensation water drops running along the tie will tricke down eventually at some distance from the insulation blanket, and thus the latter will remain dry.

[0004] The central lug of the disc, when being pressed on a tie, will be bent open elastically until the tie snaps into the seat, and then the disc will be kept clamped on the tie by the elastic tensioning force, the relatively large dimensions of the lug in the axial direction of the tie ensuring that the disc will not topple over. The disc is relatively thin and, thus, does not impede the elastic widening of the lug. Since the insulation blanket is very flat, it is not necessary that the disc remains flat when being bent open, as long as the seat sufficiently -clings to the tie.

[0005] Such a disc can be arranged on ties of different thicknesses, and the central lug will be bent open accordingly. Of course the lug will be bent open farther as the tie is thicker, and the required pressing force will increase accordingly. Although a disc adapted to be clamped on a thinner tie can be pressed on a thicker one too, the increased pressing force being generally no objection, the slot will remain open farther so that, when said slot is directed downwards, water may pass towards the blanket as yet, and there is a possibility that the seat will break loose from the tie if by bending open the seat the latter insufficiently surrounds the tie.

[0006] The latter effect can be counteracted by making the insertion slot narrower to the central lug or by making the tie seat wider indeed, the former measure will lead to a correspondingly increased pressing force, and the latter one to an insufficient clamping on thinner ties. Therefore, generally, two different discs adapted to ties of different classes of thickness will be used in practice.

[0007] The invention provides a retaining disc of this kind which will always remain safely clamped on a tie irrespective of the thickness of the tie. To that end the disc of the invention is charcterised in that the lug is in the form of a ring coaxially surrounding the seat at some distance, and in that, substantially aligned with the rims bordering the slot, two flexible strips each extend mutually parallel from respective extremities of the interrupted lug towards diametrically opposite points thereof and are integral with this lug, which strips each are provided with at least one recess, the recesses of a pair opposing one another and forming together a tie seat. In particular two or more pairs of recesses are provided which are each adapted to a group of tie thicknesses.

[0008] . When introducing a tie into the seat, said strips are bent outwards, and, as soon as the tie has reached the seat, said strips remain locally bent so that the tie remains sufficiently surrounded also at the slot side. In the case of thicker ties these strips transfer a part of the deformation force to the lug, the latter then being elastically deformed accordingly, thus providing an additional force; by being bent the strips, however, will sufficiently surround the tie. The lug and one strip act more or less as an arc and arc string resp., and the spring action of the lug is effective in particular in the case of thicker ties.

[0009] In the case of a thin tie, an additional spring action can be obtained by closing the central opening between the strips and the lug by means of an integral plastics foil providing a certain stiffening of the strips, and, moreover, by closing the opening, being able to divert condensation water. In the case of thicker ties this foil can buckle for allowing the required larger bending.

[0010] In order to obtain a uniform bending of the lug and, moreover, to save material, it is advisable to form said lug as a hollow bulge of the disc.

[0011] From NL-A-76 10 349 corresponding to DE-A-2703665 a retaining disc is known, comprising a lug in the form of a ring coaxial at some distance with the tie seat, and two integral upstanding ribs extending along the slot towards the centre of said ring and terminating there in the tie seat halves, which are connected with the lug by means of radial ribs so that a rigid unit is obtained. The lug can bend only in the region situated diametrically opposite to the slot where the disc is interrupted again. For the rest this disc cannot act as a drop deflector. Although this known disc is intended for being arranged on ties of all that available thicknesses, this appears to be hardly possible in practice because of the above- mentioned draw-backs of insufficient clamping on thicker or thinner ties.

[0012] The invention will be elucidated below by reference to a drawing, showing in:

Fig. 1 a view of a retaining disc according to the invention;

Fig. 2 a section on line 11-11 of Fig. 1; and

Fig. 3 a partial view of the central part of another embodiment of the disc according to the invention.

[0013] The retaining disc shown, which, externally, mainly corresponds to the disc of NL-A-76 09 119, comprises a plane disc-shaped portion 1 with circular circumference and an obliquely extending dripping rim 2 and an insertion slot 3 bounded by upstanding rims 4.

[0014] Coaxially with the circumference an annular lug 5 is formed integrally with the portion 1, said lug being shaped, in the case shown, as a hollow bulge, and being interrupted at the slot 3. This lug surrounds a central opening 6.

[0015] From the extremities of the interrupted lug 5 two strips/integral therewith extend through the central opening 6 towards an opposite point of the lug 5, which strips are provided in their centre with a bulge 8, which bulges form together a seat for a tie rod.

[0016] The central opening 6 between the strips 7 and the lug 5 can be closed by a plastics foil 9 which can provide a certain stiffening of the strips in the case of thinner ties, and, furthermore, closes the opening 6 in such a manner that condensation water drops can slide downwards therealong. In the case of thicker ties this foil will buckle, and will no longer contribute substantially to the effect of the strips 7.

[0017] Fig. 3 shows a special embodiment of the strips 7, in which, now, two sets of bulges or recesses 8' and 8" are provided in the strips 7, each intended for a specific group of tie thicknesses.

[0018] Since, when inserting a tie rod towards the seat 8, the strips 7 will bend at this seat, the tie will be enclosed sufficiently at both sides for ensuring an unambiguous clamping. The strips 7 act more or less as the arc string of an arc, which arc is then formed by the lug 5. In the case of thicker rods a part of the deformation force will be transferred towards this lug 5.

[0019] A disc constructed in this manner can be used for all the available tie thicknesses, and the insertion slot 3 can be chosen sufficiently wide for facilitating the insertion of thicker ties, and nevertheless the risk of breaking loose in the case of thicker rods will be avoided as the strips 7 will bend to such an extend that also a thicker tie will still be sufficiently enclosed at the side of the insertion slot 3.

Claims

1. A retaining disc for cavity wall insulation, comprising a substantially disc-shaped plastics plate (1) provided with a central opening (6) forming a seat for a cavity wall tie, and communicating with a slot (3), bounded by upstanding rims (4), extending up to the outer rim (2) of the disc through which the wall tie can be moved towards the seat when pressing the disc on a tie, which central opening (6) is surrounded by an annular lug (5) forming part of the disc and stiffening the latter but being elastically deformable, said lug (5) being interrupted at the slot (3), characterised in that the lug (5) is in the form of a ring coaxially surrounding the seat at some distance, and in that, substantially aligned with the rims (4) bordering the slot (3), two flexible strips (7) each extend mutually parallel from respective extremities of the interrupted lug (5) towards diametrically opposite points thereof, which strips (7) are integral with this lug (5), said strips (7) each being provided with at least one recess (8), the recesses (8) of a pair opposing one another and forming together a tie seat.

2. The retaining disc of claim 1, characterised in that two or more pairs of recesses (8, 8', 8") are provided which are each adapted to a group of tie thicknesses.

3. The retaining disc of claim 1 or 2, characterised in that the central opening (6) between the lug (5) and the strips (7) is closed by a plastics foil (9).

4. The retaining disc of any one of the claims 1..3, characterised in that the lug (5) is in the form of a hollow bulge of the disc (1).

Ansprüche

1. Halterungsplatte für die Hohlmauer-Isolierung mit einer im wesentlichen scheibenförmigen Kunstoffplatte (1) mit einer Mittelöffnung (6), welche eine Aufnahme für einen Hohlmauer-Anker bildet und mit einem von nach oben vorstehenden Rändern (4) begrenzten Schlitz (3) in Verbindung steht, welcher sich bis zum äußeren Rand (2) der Scheibe erstreckt, und durch den der Wand-Anker hindurchgeführt werden kann, wenn die Scheibe auf einen Anker aufgedrückt wird, wobei die Mittelöffnung von einem ringförmigen Ansatz (5) umgeben ist, welchereinen Teil der Scheibe bildet und sie versteift, dabei aber elastisch ausgebildet und am Schlitz unterbrochen ist, dadurch gekennzeichnet, daß der Ansatz (5) die Form eines die Aufnahme in einigem Abstand koaxial umgebenden Rings hat, und daß in wesentlichen ausgerichtet zu den den Schlitz (3) begrenzenden Rändern (4) zwei flexible Streifen (7) vorgesehen sind, die wechselseitig parallel von den zugeordneten Enden des unterbrochenen Ansatzes (5) aus zu ihnen diametral gegenüberliegenden Punkten verlaufen, wobei die Streifen (7) als integrale Teile des Ansatzes (5) ausgebildet und mit jeweils wenigstens einer Aussparung (8) derart versehen sind, daß ein gegenüberliegendes Paar von Aussparungen eine Anker-Aufnahme bildet.

2. Halterungsplatte nach Anspruch 1, dadurch gekennzeichnet, daß zwei oder mehr Paare von Aussparungen (8, 8', 8") vorgesehen sind, welche jeweils an eine Gruppe von Ankerdicken angepaßt sind.

3. Halterungsplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Mittelöffnung (6) zwischen dem Ansatz (5) und den Streifen (7) von einer Kunststoffolie (9) geschlossen ist.

4. Halterungsplatte nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Ansatz (5) die Form eines in die Scheibe (1) eingeformten hohlen Wulstes hat.

Revendications

1. Disque de retenue pour isolation de mur creux, comprenant une plaque (1) en matière plastique, sensiblement en forme de disque, pourve d'une ouverture centrale (6) qui constitue un siège pour une traverse du mur creux et qui communique avec une fente (3), délimitée par des rebords verticaux (4), s'étendant jusqu'au bord extérieur (2) du disque et à travers laquelle la traverse de mur peut être déplacée vers le siège lorsqu'on presse le disque sur une traverse, ladite ouverture centrale (6) étant entourée par une surélévation annulaire (5) qui fait partie du disque et raidit ce dernier mais qui est élastiquement déformable, ladite, surélévation (5) étant interrompue à l'endroit de la fente (3), caractérisé en ce que la surélévation (5) est sous la forme d'un anneau entourant coaxialement le siège à une certaine distance, et en ce que deux bandes flexibles (7), sensiblement alignées avec les rebords (4) délimitant la fente (3), s'étendent chacune, parallèlement l'une à l'autre, à partir des extrémités respectives de la surélévation interrompue (5) vers des points diamétralement opposés de cette dernière, lesdites bandes (7) étant solidaires de cette surélévation (5), lesdites bandes (7) présentant chacune au moins une partie en retrait (8), et les parties en retrait (8) d'une paire étant mutuellement opposées et constituant ensemble un siège de traverse.

2. Disque de retenue suivant la revendication 1, caractérisé en ce qu'il est prévu deux paires de parties en retrait (8, 8', 8") ou davantage, correspondant chacune à un groupe d'épaisseurs de traverse.

3. Disque de retenue suivant la revendication 1 ou 2, caractérisé en ce que l'ouverture centrale (6) entre la surélévation (5) et les bandes (7) est fermée par une feuille de matière plastique (9).

4. Disque de retenue suivant l'une quelconque des revendiations 1 à 3, caractérisé en ce que la surélévation (5) est sous la forme d'un bombement creux du disque (1).

Drawing