Patent Description:
The present invention also relates to a method for forming a fire-protection collar for closing through-passages in walls, ceilings and/or floors in the event of a fire.

The prior art discloses the practice of using fire-protection collars within buildings to close in particular feed-throughs for cables and/or non-fire-resistant pipes in walls, ceilings or floors in order to protect against fire and/or smoke in the event of a fire and thus to avoid, in the event of a fire, fire and/or smoke spreading from one room into another room and the feed-throughs being adversely affected by the fire.

The prior art discloses various configurations of such fire-protection collars, which are usually installed in front of a wall, ceiling or floor opening which allows a pipe to pass through. A fire-protection collar usually has an intumescent material, which is arranged around and in contact with a non-fire-resistant pipe. The intumescent material of the fire-protection collar here is usually arranged in a metallic sheath, which further serves, in particular with at least one holder, for fastening the fire-protection collar on walls, ceilings and/or floors by means of screws or similar fastening means. Document <CIT> discloses such a fire-protection collar.

The disadvantage with the already known fire-protection collars is, in particular, that they have a relatively large number of individual elements or components and, on account of their configuration, usually cannot be adapted with any particular degree of flexibility to different openings of feed-throughs or to pipes and/or lines of different cross sections.

In view of the already known prior art, the present invention is based on the object of providing a fire-protection collar which is intended for closing through-passages in walls, ceilings and/or floors in the event of a fire, can be produced straightforwardly and cost-effectively, in particular with only a small number of individual elements or components, and can be adapted in a flexible manner to different openings of feed-throughs or to pipes and/or lines of different cross sections.

This object is achieved by the present invention by a fire-protection collar for closing through-passages in walls, ceilings and/or floors in the event of a fire as claimed in claim <NUM>.

The lining is advantageously a tube or ring and is formed by at least one strip made of or comprising an intumescent material.

A further advantageous configuration of the invention is characterized by an integral and preferably essentially adhesive-free connection between the sheath and lining.

In a preferred configuration of the invention, on at least one side of the essentially tubular or annular sheath, the lining projects at least partially beyond the essentially tubular or annular sheath.

A further advantageous configuration of the invention is characterized by the sheath being embedded or accommodated preferably in an essentially surface-flush manner in the lining. The fire-protection-collar element according to the invention can thus advantageously be rendered more robust, in particular such that the sheath and the lining cannot so easily become detached from one another.

The foil which forms the sheath, is advantageously bimetallic. In particular the use of two metals of different coefficients of linear expansion is advantageous here. Rendering the sheath, in particular the foil, of the fire-protection-collar element bimetallic can advantageously ensure that the lining arranged beneath the metal foil, preferably the lining-forming strip made of or comprising a material which is preferably intumescent in the event of a fire, is retained on the enclosed pipe or the enclosed line or pipeline even in the event of a fire.

The foil has a thickness of preferably approximately <NUM> to approximately <NUM>.

The lining is or can advantageously be formed from or by a non-prefoamed intumescent material. Using such a material means that the latter expands to a relatively great extent in the event of a fire, or such a material expands a number of times in the event of a fire. In addition to providing for further-improved prevention of the penetration of smoke and/or fire in the event of a fire, such a material also has an insulating effect.

A further advantageous configuration of the invention is characterized by a maximum overall thickness of the fire-protection-collar band ranging from <NUM> to <NUM>, preferably ranging from approximately <NUM> to approximately <NUM>. It has been established that, with a maximum overall thickness according to the invention, it is possible to achieve a better bending capability of the fire-protection-collar band, and this provides for, in particular, more straightforward adaptation to lines and/or pipes of relatively small cross sections.

Preferably, the side peripheries of the strip which run in the direction of the longitudinal extent of the fire-protection-collar band are spaced apart from the side peripheries of the foil which run in the direction of the longitudinal extent of the fire-protection-collar band and the width of the strip is greater than the width of the foil.

The invention here exploits, in particular, the finding that, if use is made of a fireproof and essentially strip-like foil on which a strip made of or comprising an intumescent material, is positioned, the fire-protection collar is easy to make, in particular by virtue of the fire-protection-collar band being cut to any desired length, for example by means of scissors or side cutters. In particular on account of its flexibility, the fire-protection-collar band can also be adapted straightforwardly to different openings of feed-throughs or pipes and/or lines of different cross sections.

An advantageous configuration of the invention is characterized by an integral and preferably essentially adhesive-free connection between the foil and strip made of or comprising an intumescent material.

A further advantageous configuration of the invention is characterized by the foil being embedded or accommodated preferably in an essentially surface-flush manner in the strip made of or comprising an intumescent material. The fire-protection-collar band can thus advantageously be rendered more robust, in particular such that the foil and the strip made of or comprising an intumescent material, cannot so easily become detached from one another.

The foil of the fire-protection-collar band is advantageously bimetallic. In particular the use of two metals of different coefficients of linear expansion is advantageous here. Rendering the foil of the fire-protection-collar band bimetallic can advantageously ensure that the strip made of or comprising an intumescent material, said strip being arranged beneath the flexible metal foil, is retained on the enclosed pipe or the enclosed line even in the event of a fire.

According to the invention, provision is made for the foil to be a flexible metal foil and to have a thickness of approximately <NUM> to approximately <NUM>, preferably of approximately <NUM> to approximately <NUM>. Selecting such properties for the foil can ensure that, while the amount of material used is as small as possible, sufficient stability of the fire-protection-collar band is achieved. It is thus advantageously possible to achieve a comparatively low weight for the fire-protection-collar band without this having an adverse effect on the fire-protection properties relating to the design of a fire-protection collar.

In a further advantageous configuration, provision is made for the strip made of or comprising an intumescent material, to be made of a non-prefoamed material. Using such a material means that the latter expands to a relatively great extent in the event of a fire, or such a material expands a number of times in the event of a fire. In addition to providing for further-improved prevention of the penetration of smoke and/or fire in the event of a fire, such a material also has an insulating effect.

A further configuration of the invention is characterized by a maximum overall thickness of the fire-protection-collar band ranging from <NUM> to <NUM>, preferably ranging from approximately <NUM> to approximately <NUM>. It has been established that, with a maximum overall thickness according to the invention, it is possible to achieve a better bending capability of the fire-protection-collar band, and this provides for, in particular, more straightforward adaptation to lines and/or pipes of relatively small cross sections.

A further advantageous configuration of the invention provides for the fire-protection-collar element to have at least one holder, preferably three holders, by means of which a fire-protection collar formed for closing through-passages in walls, ceilings and/or floors in the event of a fire is fastened on a structural part, in particular a wall, a ceiling and/or a floor of a room, wherein the holder has, or each of the holders has, a portion for fastening the holder on a structural part, in particular wall, ceiling and/or floor of a room, and a portion having means for anchoring and/or fixing the holder on the fire-protection-collar element.

The portion for fastening the holder on a structural part and the portion with means for anchoring and/or fixing a fire-protection-collar element on the holder advantageously enclose an angle, preferably an angle ranging from approximately <NUM>° to approximately <NUM>°, preferably an angle of approximately <NUM>°.

The means for anchoring and/or fixing the holder on the fire-protection-collar element are lugs which can be bent around the side peripheries of the fire-protection-collar element and/or lugs which can be bent into the fire-protection-collar element.

The advantage of such a fire-protection-collar holder, in addition to the compact construction thereof, is, in particular, its straightforward handling capability during installation.

The present invention also relates to a system of a fire-protection collar band and a closure according to the technical features of claim <NUM>.

The interacting means for connecting the closure elements advantageously comprise at least one aperture on one of the closure elements and at least one lug on the other of the closure elements, it being possible for said lug to be brought into engagement with the aperture.

The use of such a closure according to the invention further improves the flexibility of a fire-protection collar according to the invention. The design of the closure allows the latter to be fitted straightforwardly on a fire-protection-collar band which has previously been cut to any desired length. A closure according to the invention advantageously comprises just two, or a maximum of three, components, and this simplifies both production and installation. Furthermore, it is possible for the closure to be installed on a fire-protection-collar band advantageously by straightforward means, for example by virtue of the means for anchoring and/or fixing the closure elements on the fire-protection-collar band, and the interacting means for connecting the closure elements, being mechanically deformed by bending, in particular, using a screwdriver or using a pair of pliers.

According to a preferred configuration of the invention, provision is made for the closure and/or the closure elements to be made of metal or sheet metal. The closure forming part of the invention can thus ensure a reliable connection to a fire-protection-collar band, and a reliable closure of the same, and can provide for feed-throughs to be sealed in particular in the event of a fire. The closure or the closure elements is/are advantageously made from metal, in particular sheet metal, and preferably with a thickness of approximately <NUM> to approximately <NUM>. With the amount of material used being as small as possible, this advantageously ensures sufficient stability of the closure or of the closure elements.

In addition, the present invention relates to a method for forming a fire-protection collar for closing through-passages in walls, ceilings and/or floors in the event of a fire as claimed in claim <NUM>.

An advantageous configuration of the invention provides for the fire-protection-collar band to be arranged at a distance around the at least one pipeline passing through the wall, the ceiling or the floor, preferably at a distance of more than <NUM>, preferably at a distance of more than <NUM>, or even more than <NUM>. The distance preferably is below <NUM>; more preferably below <NUM>; and even more preferably below <NUM>. In particular embodiments, the distance is between <NUM> and <NUM>. In specific embodiments, the distance is between <NUM> and <NUM>. In further embodiments, the distance is between <NUM> and <NUM>.

A further advantageous configuration of the invention provides for the fire-protection-collar band to be arranged around the at least one pipeline passing through the wall, the ceiling or the floor by virtue of the pipeline being wrapped with a fire-protection-collar band in the region of the through-passage, by virtue of the fire-protection-collar band being provided with at least one closure, preferably a closure forming part of the system according to the invention, in particular a closure which has a closure element which can be fastened at the first end of the fire-protection-collar band and a closure element which can be fastened at the second end of the fire-protection-collar band, the closure elements having means for anchoring and/or fixing the respective closure element on the fire-protection-collar band and interacting means for connecting the closure elements, and by virtue of the at least one closure being closed, wherein the fire-protection-collar band is provided with at least one closure preferably either before or after the fire-protection-collar band is arranged around the at least one pipeline, and wherein the at least one closure is closed preferably either before or after the fire-protection-collar band is arranged around the at least one pipeline.

Further details, features and advantages of the invention will be explained more specifically hereinbelow with reference to the exemplary embodiments illustrated in the figures of the drawings, in which:.

<FIG> shows a plan view of an exemplary embodiment of a fire-protection-collar band <NUM> for forming a fire-protection collar according to the invention for closing through-passages in walls, ceilings and/or floors in the event of a fire, having at least one lining <NUM> which is made of or comprises an intumescent material, and is positioned or fitted on the inner surface of a fireproof and essentially tubular or annular sheath <NUM> made of metal.

The fire-protection-collar band <NUM> has a strip <NUM> made of or comprising an intumescent material, and having a fireproof and essentially strip-like foil <NUM>, in the present case a flexible metal foil, preferably a bimetallic one, with a thickness of approximately <NUM>. The foil <NUM> here forms the sheath <NUM> of the fire-protection-collar element <NUM>. The strip <NUM> here forms the lining <NUM> of the fire-protection-collar element <NUM>. The side peripheries of the strip <NUM> which run in the direction of the longitudinal extent of the fire-protection-collar band <NUM> are spaced apart from the side peripheries of the foil <NUM> which run in the direction of the longitudinal extent of the fire-protection-collar band <NUM>. The width of the strip <NUM> here is greater than the width of the foil <NUM>.

The foil <NUM>, which in the present case is positioned on the strip <NUM> made of or comprising an intumescent material, gives the strip <NUM> increased stability and simplifies the installation of the same. The material of the strip <NUM> is advantageously a non-prefoamed material which advantageously expands for the first time in the event of a fire, under the action of heat.

<FIG> shows a sectional side view of a further exemplary embodiment of a fire-protection-collar band <NUM> for use in the invention. The foil <NUM> here is at least partially embedded or accommodated in the strip <NUM> made of or comprising an intumescent material which increases in volume in the event of a fire. A preferred configuration (not illustrated explicitly here) of the invention provides for the foil <NUM> to be embedded or accommodated in an essentially surface-flush manner in the strip <NUM> made of or comprising an intumescent material which increases in volume in the event of a fire. It can be seen from <FIG> that the foil <NUM> has approximately half of its overall thickness embedded in the strip <NUM> made of or comprising a material which increases in volume in the event of a fire. It is thus advantageously possible to achieve a reliable connection between the foil <NUM> and strip <NUM> during production of a fire-protection-collar band <NUM> and to ensure that, in particular when the fire-protection-collar band <NUM> is being processed or installed, the strip <NUM> does not become detached from the foil <NUM> or the foil <NUM> does not become detached from the strip <NUM>. The robustness of a fire-protection-collar according to the invention is thus improved overall.

Both in the case of the exemplary embodiment according to <FIG> and in the case of the exemplary embodiment according to <FIG>, provision is also made for the fire-protection-collar band <NUM> to have a maximum overall thickness of <NUM> or a maximum overall thickness of <NUM>.

<FIG> shows a plan view of a first exemplary embodiment of a closure <NUM> for use in the invention with a fire-protection-collar band <NUM> (not illustrated in <FIG>), having a closure element <NUM> which can be fastened at the first end of the fire-protection-collar band <NUM> and a closure element <NUM> which can be fastened at the second end of the fire-protection-collar band <NUM>. The closure elements <NUM> and <NUM> of the closure <NUM>, said closure elements being produced preferably from metal or sheet metal, have means <NUM> and <NUM> for anchoring and/or fixing the respective closure elements <NUM>, <NUM> on the fire-protection-collar band <NUM>. The closure elements <NUM> and <NUM> also have interacting means <NUM> and <NUM> for connecting the closure elements <NUM> and <NUM>. The means <NUM> of the closure <NUM> are designed in the form of lugs <NUM> which can be bent around the side peripheries of the fire-protection-collar band <NUM>. The means <NUM> of the closure <NUM> are designed in the form of lugs <NUM> which can be bent into the fire-protection-collar band <NUM>. The interacting means <NUM> and/or <NUM> of the closure elements <NUM> and <NUM>, respectively, are designed in the form of an aperture <NUM> on the closure element <NUM> and of a lug <NUM> on the closure element <NUM>, it being possible for said lug to be brought into engagement with the aperture <NUM> of the closure element <NUM>. The means <NUM>, <NUM> and/or <NUM> of the closure elements <NUM> and <NUM> can advantageously be mechanically deformed or bent using a screwdriver, a pair of pliers or a similar tool and therefore provide for the closure <NUM> to be straightforwardly installed and closed.

<FIG> shows a plan view of a second exemplary embodiment of a closure <NUM> for use in the invention with a fire-protection-collar band <NUM> (not illustrated in <FIG>). The closure <NUM> according to <FIG> differs from the closure <NUM> according to <FIG> by the configuration and arrangement of the interacting means <NUM> and/or <NUM> of the closure elements <NUM> and <NUM>. The closure elements <NUM> and <NUM> according to <FIG> each have, arranged one beside the other on one side, a lug <NUM> and an aperture <NUM>, which can be brought into engagement with a corresponding aperture <NUM> and lug <NUM> on the respectively other closure element <NUM>, <NUM>. Doubling up in this way on the interacting means <NUM> and/or <NUM> on the closure elements <NUM> and <NUM> of the closure <NUM> according to <FIG> provides for the closure <NUM> to be closed in a reliable manner, in particular such that it is sufficient to produce the closure elements <NUM> and <NUM> from metal or sheet metal with a thickness of just <NUM>.

<FIG> shows a plan view of a third exemplary embodiment of a closure <NUM> for use in the invention with a fire-protection-collar band <NUM> (not illustrated in <FIG>). The closure <NUM> according to <FIG> differs from the closure <NUM> according to <FIG> by the configuration and arrangement of the interacting means <NUM> and/or <NUM> of the closure elements <NUM> and <NUM>. The closure elements <NUM> and <NUM> according to <FIG> correspond to the closure element <NUM> according to <FIG> and, to this extent, are of the same configuration. The closure element <NUM> according to <FIG>, instead of the lug <NUM> - as is provided for the closure element <NUM> according to <FIG> - likewise has an aperture <NUM>, as is provided for the closure element <NUM> according to <FIG>. A securing element <NUM>, which interacts with the apertures <NUM> of the closure elements <NUM> and <NUM>, is provided in order to close the closure <NUM> according to <FIG>, it being possible for said securing element <NUM>, for this purpose, to be pushed through the two apertures <NUM> of the closure elements <NUM> and <NUM> and then to be mechanically deformed.

<FIG> shows a schematic side view of a first exemplary embodiment of a holder <NUM>, by means of which a fire-protection collar formed for closing through-passages in walls, ceilings and/or floors is fastened on a structural part, in particular a wall, a ceiling and/or a floor. The holder <NUM> has a portion <NUM> for fastening the holder on a structural part, in particular wall, ceiling and/or floor of a room, and a portion <NUM> with means <NUM> and <NUM> for anchoring and/or fixing a fire-protection-collar band <NUM> (not illustrated in <FIG>) on the holder <NUM>. Provision is made here, in particular, for the fire-protection-collar band <NUM> to be fixed by virtue of the means <NUM> being deformed, for example using a screwdriver or a pair of pliers. The means <NUM> of the holder <NUM> according to <FIG> in the present case are designed to accommodate a single layer of a fire-protection-collar band <NUM>. The fastening of the holder <NUM> on a structural part by way of the fastening portion <NUM> can take place, for example, using screws or similar fastening means.

<FIG> shows a schematic side view of a second exemplary embodiment of a holder <NUM>, by means of which a fire-protection collar formed for closing through-passages in walls, ceilings and/or floors is fastened on a structural part, in particular a wall, a ceiling and/or a floor. The holder <NUM> according to <FIG> differs from the holder <NUM> according to <FIG> by the configuration of the means <NUM> for anchoring and/or fixing a fire-protection-collar band <NUM> (not illustrated in <FIG>) on the holder <NUM>. In the case of the exemplary embodiment of the holder <NUM> according to <FIG>, the means <NUM> of the portion <NUM> are designed for accommodating two layers of a fire-protection-collar band <NUM>. The layers of the fire-protection-collar band <NUM> can be arranged one above the other here. The means <NUM> of the portion <NUM> of the holder <NUM> according to <FIG> are configured and dimensioned here such that they can penetrate not just the first layer of the fire-protection-collar band <NUM>, but also the second layer of the fire-protection-collar band <NUM>. Overall, this provides for the two layers of the fire-protection-collar band to be retained firmly and reliably.

A further advantageous configuration of the invention provides for the means <NUM> of the portion <NUM> of the holder <NUM> according to <FIG> to be extended or dimensioned such that it is also possible to fix more than two layers of the fire-protection-collar band <NUM>.

<FIG> shows a schematic side view of a third exemplary embodiment of a holder <NUM>, by means of which a fire-protection collar formed for closing through-passages in walls, ceilings and/or floors is fastened on a structural part, in particular a wall, a ceiling and/or a floor. The holder <NUM> according to <FIG> differs from the holder <NUM> according to <FIG> by the configuration of the means <NUM> for anchoring and/or fixing a fire-protection-collar band <NUM> (not illustrated in <FIG>) on the holder <NUM>. In the case of the exemplary embodiment according to <FIG>, two means <NUM> serving for retaining or fixing the fire-protection-collar band <NUM> are provided merely on that side of the holder <NUM> which is illustrated at the top in <FIG>, whereas only one means <NUM> serving for retaining or fixing the fire-protection-collar band <NUM> is provided on that side of the holder <NUM> which is illustrated at the bottom in <FIG>. The configuration according to <FIG> has, in particular, installation-related advantages for the fitting of a fire-protection collar having a fire-protection-collar band <NUM> with more than one layer.

Fire-protection-collar bands <NUM>, closures <NUM> and holders <NUM> used in the invention advantageously make it possible to provide a fire-protection-collar system which is intended for closing through-passages in walls, ceilings and/or floors in the event of a fire, and a kit which is intended for forming a fire-protection collar for closing through-passages in walls, ceilings and/or floors in the event of a fire, can be produced straightforwardly and cost-effectively, in particular with only a small number of individual elements or components, and can be adapted in a flexible manner to different openings of feed-throughs or to pipes and/or lines of different cross sections.

A fire-protection collar for closing through-passages in walls, ceilings and/or floors in the event of a fire is formed as follows:
Arranging a fire-protection-collar band <NUM> around at least one pipeline passing through a wall, a ceiling or a floor, in particular such that, under the action of an elevated temperature, in particular in the event of a fire, intumescent material of the fire-protection-collar band <NUM> expands and closes the through-passage through the wall, the ceiling or the floor in order to prevent fire and/or smoke from spreading from one room into another room.

Fastening at least one holder <NUM>, preferably at least three holders <NUM>, on the fire-protection-collar band <NUM>, either before or after the fire-protection-collar band <NUM> is arranged around the at least one pipeline.

Optionally aligning the at least one holder <NUM>, preferably the at least three holders <NUM>, in relation to the passage of the pipeline through the wall, the ceiling or the floor.

Fastening the at least one holder <NUM>, preferably the at least three holders <NUM>, by at least one fastening means, preferably a screw, on the wall, the ceiling or the floor.

The fire-protection-collar band <NUM> here is arranged, in particular, at a distance around the at least one pipeline passing through the wall, the ceiling or the floor, preferably at a distance of more than <NUM>, preferably at a distance of more than <NUM>, or even more than <NUM>.

The fire-protection-collar band <NUM> is arranged around the at least one pipeline passing through the wall, the ceiling or the floor by virtue of the pipeline being wrapped with a fire-protection-collar band <NUM> in the region of the through-passage, by virtue of the fire-protection-collar band <NUM> being provided with at least one closure <NUM>, and by virtue of the at least one closure <NUM> being closed. The fire-protection-collar band <NUM> here is provided with at least one closure <NUM> preferably either before or after the fire-protection-collar band <NUM> is arranged around the at least one pipeline. The at least one closure <NUM> is closed preferably either before or after the fire-protection-collar band <NUM> is arranged around the at least one pipeline.

<FIG> shows a fire-protection collar <NUM> designed according to the invention for closing a through-passage in a wall, ceiling and/or floor in the event of a fire. The fire-protection collar <NUM> comprises an essentially annular or tubular fire-protection-collar band <NUM> which, for fastening on a structural part, in particular wall, ceiling and/or floor, is provided in this case with four holders <NUM>. The holders <NUM> here are distributed uniformly over the circumference of the annular fire-protection element <NUM>. The fire-protection-collar band <NUM> has an annular or tubular metallic sheath <NUM> which, on its inner surface, is provided with an essentially annular or tubular fireproof lining <NUM> made of a material which increases in volume in the event of a fire, preferably an intumescent material. The lining <NUM> here is advantageously designed in the form of an annular or tubular moulding (cf. , in particular, <FIG>). The sheath <NUM> here is located exclusively on the outer side of the lining <NUM> (cf. also the exemplary embodiment according to <FIG>). The holders <NUM> (cf. also <FIG>) each have a portion <NUM>, which serves for fastening on a structural part, in particular wall, ceiling and/or floor, and is positioned essentially parallel on the structural part. The portion <NUM> has an opening <NUM>, which allows the holder <NUM> to be screwed on the structural part using a screw. The holders <NUM> (cf. also <FIG>) also each have a portion <NUM>, which is positioned on the side surface of the fire-protection-collar band <NUM> and accommodates the latter, and fixes it in position, between itself and the structural part. As can also be seen from <FIG>, the holders <NUM> each also have means <NUM> for anchoring and/or fixing on or in the lining <NUM> of the fire-protection-collar band <NUM>.

That exemplary embodiment of a fire-protection collar <NUM> according to the invention which is illustrated in <FIG> differs from that exemplary embodiment of a fire-protection collar <NUM> according to the invention which is illustrated in <FIG> by the design of the lining <NUM> of the fire-protection-collar band <NUM>. Whereas the lining <NUM> of the fire-protection-collar element <NUM> in the exemplary embodiment according to <FIG> is designed advantageously in the form of an annular or tubular moulding (cf. , in particular, <FIG>), the lining <NUM> of the fire-protection-collar element <NUM> in the exemplary embodiment according to <FIG> is formed from an annularly or tubularly joined-together strip <NUM> made of an intumescent material (cf. , in particular, <FIG>) (this being shown clearly in <FIG> by way of the portions of the intumescent strip <NUM> which are indicated by 12a and 12b). As in the exemplary embodiment according to <FIG>, the metallic sheath <NUM> is located exclusively on the outer side of the lining <NUM>.

<FIG> shows the design of a fire-protection collar <NUM> for closing a through-passage in a wall <NUM>. A fire-protection-collar band <NUM> (cf. , in particular, <FIG> or <FIG>) here is arranged around a pipeline <NUM> passing through the wall, in particular such that, under the action of an elevated temperature, in particular in the event of a fire, intumescent material of the lining <NUM> of the fire-protection-collar band <NUM> expands and closes the through-passage through the wall <NUM> in order to prevent fire and/or smoke from spreading from one room into another room. Four holders <NUM> are fastened on the fire-protection-collar element <NUM> such that the portion <NUM> of the respective holders <NUM> butts essentially parallel against the surface <NUM> of the wall <NUM> and can be fastened on the wall <NUM> by means of a screw. The fire-protection-collar element <NUM> here is arranged, in particular, at a distance around the pipeline <NUM> passing through the wall <NUM>, preferably at a distance of more than <NUM>, preferably at a distance of more than <NUM>, or even more than <NUM>.

<FIG> show a further exemplary embodiment of a fire-protection-collar band <NUM> for forming a fire-protection collar according to the invention for closing through-passages in walls, ceilings and/or floors in the event of a fire, having at least one lining <NUM> which is made of or comprises an intumescent material, and is positioned or fitted on the inner surface of a fireproof and essentially tubular or annular sheath <NUM> made of metal.

The fire-protection-collar band10 according to <FIG> has a strip <NUM> made of or comprising an intumescent material, and having a fireproof and essentially strip-like foil <NUM>, in the present case a flexible metal foil, preferably a bimetallic one, with a thickness of <NUM>. The foil <NUM> here forms the sheath <NUM> of the fire-protection-collar band <NUM>. The strip <NUM> here forms the lining <NUM> of the fire-protection-collar band <NUM>. The strip-like foil <NUM> and the intumescent strip <NUM> here have the same surface-area dimensions and are arranged congruently one upon the other, in particular the width of the strip <NUM> is equal to the width of the foil <NUM>. The foil <NUM> gives the strip <NUM> increased stability and simplifies installation. The material of the strip <NUM> is advantageously a non-prefoamed material which advantageously expands for the first time in the event of a fire, under the action of heat.

The fire-protection-collar band <NUM> according to <FIG> differs from the fire-protection-collar band <NUM> according to <FIG> by the configuration of the strip <NUM> made of or comprising an intumescent material, said strip forming the lining <NUM>. In the case of the exemplary embodiment according to <FIG>, the strip <NUM> is advantageously provided with a covering <NUM>. The covering <NUM>, as illustrated in <FIG>, is present on those side surfaces of the strip <NUM> which are not, or have not been, provided with the sheath <NUM>. The covering <NUM> is advantageously a woven fabric or similar composite material, which further reinforces the strip and thus improves handling. In addition, the preferably perforated covering <NUM> is advantageously designed such that, in the event of a fire, it provides for a defined and reliable increase in volume of the volumeincreasing material.

Claim 1:
Fire-protection collar (<NUM>) for closing through-passages in walls (<NUM>), ceilings and/or floors in the event of a fire, which fire-protection collar comprises a fire-protection-collar band (<NUM>) having at least one lining (<NUM>) in the form of a strip, which is made of or comprises an intumescent material, and further having a fireproof, thin, strip-like foil (<NUM>) forming a fireproof sheath of the fire-protection-collar band (<NUM>), which is or can be formed in an essentially tubular or annular manner, wherein the foil (<NUM>) is a flexible metal foil and has a thickness of <NUM> to <NUM>, wherein said foil (<NUM>) is located exclusively on the outer side of the strip (<NUM>) of intumescent material and forms essentially the outer side of the fire-protection collar (<NUM>),
wherein said fire-protection collar band (<NUM>) is provided with a closure (<NUM>) having a closure element (<NUM>) which can be fastened at the first end of the fire-protection-collar band (<NUM>) and further having a closure element (<NUM>) which can be fastened at the second end of the fire-protection-collar band (<NUM>), said closure elements (<NUM>, <NUM>) having:
- interacting means (<NUM>, <NUM>) for connecting the closure elements (<NUM>, <NUM>);
- means (<NUM>, <NUM>) for anchoring and fixing the closure element (<NUM>,<NUM>)) on the fire-protection-collar band (<NUM>), said means for anchoring and fixing comprising lugs (<NUM>) to be bent around side peripheries of the fire-protection-collar band (<NUM>) and further comprising lugs (<NUM>) to be bent into the fire-protection-collar band (<NUM>).