FIXING MEANS

DISPOSITIF DE FIXATION

English Abstract

ABSTRACT
A fixing means for attachment to a base (1), e.g. to a level
concrete roof, of a thermal lagging (3), e.g. a mineral wool
mat, said fixing means consisting of a screw (2) or other nail
binding to the base and a washer (4) located on top of the
lagging, this washer carrying a tubular recess (5) partly pen-
etrating into the lagging (3) and the bottom (6) of which is
pierced by the screw and within which the head of the screw
(2) resides. To the end of the tubular recess (5) has been
connected by stays (7) a plug (8) fitting into a hole drilled
in the base (1) and into which the screw (2) can be screwed.

Claims

Claims
1. Improvement in a fixing means for attachment of a resilient
thermal lagging, for instance a mineral wool mat, to a base, for
instance a level roof of concrete, said fixing means consisting
of a screw or other nail binding to the base and of a washer
located on top of the lagging and presenting a tubular recess
penetrating partly into the lagging, the bottom of this recess
being pierced by the screw and the head of the screw residing
therewithin, wherein the improvement comprises that to the
end of the tubular recess has been connected by stays a plug
fitting into a hole drilled in the base and into which plug
the screw can be screwed.
2. Fixing means according to claim 1, characterized in that
the stays consist of easily bendable ligaments formed by
casting between the bottom of the tubular recess and the plug
of the same material.
3. Fixing means according to claim 1, characterized in that
the plug and the stays constitute a substantially downwardly
tapering end.

Description

1 158828
The pre~sent invention concerns ~ lixing ~ear,. ~r ~ttacn~ent of
a resilient thermal lagging, for instance a mineral wool mat, to
a ba~se, for instance a level roof, said fixing means consisting
of a screw or other nail entering the base and a washer located
upon the la~ging and presenting a tubular recess partly pene-
trating into the lagging, the screw piercing the bottom of this
recess and the head of the screw being located in this recess.
The attachment of a lagging to a base of concrete, for instance,
has caused various inconveniences because it is difficult to
acnieve good anchoring of long concrete nails. Therefore, various
fixing means with tubular recesses have been developed, but all
have the feature in common that tneyare rigidly affixed to the
base. This introduces other drawbacks known in themselves already,
namely, that when the lagging is compressed e.g. when a person
walks thereon, the fixing means does not contract equivalently
and instead projects from the surface of the lagging. When the
lagging has been covered with roofing felt or equivalent covering
material, the top end of the fixing means will perforate the cover-
ing by pushing through.
The object of the present invention is to provide a new type of
fixing means. The fixing means of the invention is characterized in
that to the end of the tubular recess has by the aid of stays been
attached a plug fitting into a hole drilled in the base and into
which plug the screw can be screwed. Thanks to the invention,
the plug and the screw screwed into the plug are the sole members
which will be rigidly connected with the base, since the stays
bend to the side in connection with fixing. It follows that the
rest of the fixing means remains even further on resilient, for
instance in the case that it is trod upon.
A favourable embodiment of the invention is characterized in
that the stays consist of readily bendable ligaments formed by ¦
casting of the same material between the bottom of the recess and
the plug. The fixing means made by casting of one material, e.g. ¦
of plastic, is easy and favourable to manufacture.
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~ 158828
Another embodiment of the invention is characterized in that
the plug and stays constitute a substantially downwardly taper-
ing end. When a hard metal drill bit of e.g. 6 ~Im dia. has been
used, through the lagging, to drill a hole in the concrete, a
fixing means of this type and the plug on its end will be easily
guided to the right spot as it is being installed.
The invention is described in the following with the aid of an
example, with reference to the attached drawing, wherein:-
Fig. 1 presents a fixing means according to the invention.
Fig. 2 displays the fixing means when mounted, sectioned.
Fig. 3 shows the fixing means of Fig. 2, in another position.
The fixing means consists of a screw 2 binding to the concreteroof 3 and of a washer 4 located upon the lagging 3, this washer
carrying a tubular recess 5 penetrating part of the way into the
lagging, the bottom 6 of this recess being pierced by the screw
2 and the head of the screw residing therein.To the end 6 of the
tubular recess 5 has been connected by stays 7 a plug 8 fitting
into the hole drilled in the concrete and into which plug the
screw 2 may be screwed. The stays 7 are formed between the bottom
6 of the tubular recess 5 and the plug 8, in the form of ligaments
made by casting of the same material, and which are readily flex-
ible.
Upon the poured concrete roof 1 is spread out a mineral wool mat
3, through which is drilled into the concrete for the plug 8 a
hole of e.g. 6 mm diameter. The fixing means is pushed with the
plug 8 first through the lagging 3 so that the plug enters the
hole drilled in the concrete 1. A screw 2 is dropped down into
the¦tubular recess 5, and this screw is used to draw the washer
4 tight against the lagging. The plug 8 is tightly fixed in the
concrete, and the stays 8 bend to the side. On top of all, a
roofing felt 9 is spread out. When a person walks on the roof and
treads upon a fixing means, the fixing means will yield downward-
ly as shown in Fig. 2 and will not damage the roofing felt.
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1 158~28
I-t is obvious to a person skilled in tne art that di~ferent em-
bodin-nts of the invention may vary within the scope of ~he
claims following below. ~or instance, the stays n-ust not neces-
sarily be as snown in the figure: they may equally consist of
a thin-walled tube encirclin~ the screw and which is compressed
in accordeon f~sr~ion. Tne stays may also consist of a more rigid
material and so that they break off in connection with the
mounting.