GB2584713A - A fire curtain housing - Google Patents

A fire curtain housing Download PDF

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Publication number
GB2584713A
GB2584713A GB1908483.9A GB201908483A GB2584713A GB 2584713 A GB2584713 A GB 2584713A GB 201908483 A GB201908483 A GB 201908483A GB 2584713 A GB2584713 A GB 2584713A
Authority
GB
United Kingdom
Prior art keywords
fire curtain
roller
fire
adjusting means
curtain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1908483.9A
Other versions
GB201908483D0 (en
GB2584713B (en
Inventor
Thomas Calow Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smoke & Fire Curtains Ltd
Original Assignee
Smoke & Fire Curtains Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smoke & Fire Curtains Ltd filed Critical Smoke & Fire Curtains Ltd
Priority to GB1908483.9A priority Critical patent/GB2584713B/en
Publication of GB201908483D0 publication Critical patent/GB201908483D0/en
Publication of GB2584713A publication Critical patent/GB2584713A/en
Application granted granted Critical
Publication of GB2584713B publication Critical patent/GB2584713B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B9/17007—Shutter boxes; Details or component parts thereof
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/10—Fire-proof curtains
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/13—Roller shutters with closing members of one piece, e.g. of corrugated sheet metal
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/40—Roller blinds
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B9/171—Rollers therefor; Fastening roller shutters to rollers
    • E06B2009/1716—Arrangements to improve rolling of the shutter on the roller

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Special Wing (AREA)

Abstract

A fire curtain housing 1 for adjusting the height of a deployed fire curtain 2, 3 is disclosed. The housing comprises a roller 6 on which fire curtains may be mounted, an exit slot 8 and an adjusting means 12. The housing defines a first and a longer second path. Optionally the adjusting means may be a roller or a rounded bar. The adjusting means can be maintained in a fixed position or be mounted on an actuator 10 to vary the length of the first fire curtain path relative to the second. The actuator may comprise a hinged arm which can be moved between a first and second position.

Description

A Fire Curtain Housing
Field of the Invention
The present invention relates to deployable fire curtains that are stored on a roller within a housing and that can be deployed in an emergency by unrolling from said roller.
Background to the Invention
Fire curtains are used to contain fires, to stop fires spreading through buildings, and to insulate one are of a building from a fire in an adjacent area. They can be movable such that they are 113 only deployed in the case of an emergency. Fire curtains are formed of sheets of fire-resistant material, which is generally relatively thick and heavy. It is important that fire curtains are hung in a robust manner from supports that can both support the weight of the curtain and can resist the fire.
Generally, movable fire curtains are hung in a rolled state on a steel barrel roller located inside a steel top box. The top box has a narrow exit slot at a lower side through which the fire curtain can descend downwards in the event of a fire. In some circumstances a single length of fire curtain is sufficient to completely block off an area. However, in some circumstances it is necessary or desirable for fire curtains to be deployable over a length that makes it impractical or disadvantageous to use a single length of fire curtain. In such circumstances more than one fire curtain may be provided in a single top box. However, as will be readily appreciated, it is essential that there are no gaps between lengths of adjacent fire curtains when the curtains are deployed. Having gaps between adjacent fire curtains would render the fire curtains ineffective. In order to avoid having gaps between adjacent fire curtains, in situations where it is necessary to utilise more than one length of fire curtain within atop box it is usual to overlap end portions of adjacent fire curtains. In such situations at the overlapping end portions adjacent fire curtains will be rolled on a single roller within a top box such that there are two layers of fire curtain rolled on a single roller.
Having two layers of fire curtain rolled on a single roller can be problematic in that the material from which fire curtains are formed is thick. As a result, when unrolling two layers of fire curtains (an outer fire curtain and an inner fire curtain) from a single roller different heights of fire curtain are unrolled. In particular, for each revolution of the roller a greater height of the outer fire curtain will be unrolled as compared to the inner fire curtain. This is because for each revolution around the roller the outer fire curtain is wrapped around an additional layer of fire curtain as compared to the inner fire curtain. This additional layer of fire curtain increases the diameter, and therefore circumference, about which the outer fire curtain is wrapped, the increased circumference being proportional to the thickness of the inner fire curtain. However, in order to properly protect against fire two fire curtains should be deployed to exactly the same height e.g. the height from an exit slot in a housing to a floor of a building.
In light of the above, there is a need for an apparatus that allows two fire curtains to be rolled on the same roller within a top box and to be deployed from the top box to the exact same height in an emergency situation.
Summary of the Invention
The present invention provides a fire curtain housing comprising: a roller on which fire curtains may be mounted having a longitudinal axis; an exit slot parallel to the longitudinal axis of the roller; and an adjusting means mounted on an actuator and maintained parallel to the longitudinal axis of the roller; wherein a first fire curtain path is defined by the roller and the exit slot and passes a first side of the adjusting means; and a second fire curtain path is defined by the roller and the exit slot and passes a second side of the adjusting means; wherein the adjusting means is positioned such that the length of the second fire curtain path is longer than the length of the first fire curtain path.
The housing of the present invention is advantageous in that when two fire curtains are wrapped around a single portion of a roller the adjusting means can be used to compensate for the difference in the height of fire curtains that is deployed from the roller.
In particular, as set out above in the discussion of the background, when two fire curtains, or portions thereof, are wrapped around a single roller the innermost of the two fire curtains will be wrapped around a shorter distance than the outermost of the two fire curtains. Therefore, as the two fire curtains are unrolled from the roller uneven lengths of fire curtain will be deployed. For every single revolution of the roller a slightly greater length of the outermost curtain will be deployed. The slightly greater length of the outermost curtain that is deployed being approximately proportional to the thickness of the innermost curtain.
In order that equal lengths of fire curtain are deployed the housing of the present invention provides a second fire curtain path for a second fire curtain that is longer than a first fire curtain path for a first fire curtain curtain. The first fire curtain path being the path by which the first fire curtain exits the housing from the roller via an exit slot provided in the housing and the second fire curtain path being the path by which the second fire curtain exits the housing from the roller via an exit slot. The difference in length between the first and second fire curtain paths is controlled to compensate for the difference in heights of the first and second fire curtains unrolled from the roller. The precise compensation required for any embodiment of the invention will depend on a number of criteria, for example the thickness of the first curtain, the thickness of the second curtain, how tightly rolled the first and second curtain are on the roller, and the height of fire curtain that is required to be unrolled from the roller.
In embodiments of the invention the adjusting means may be fixed in position and the housing may be formed such that first fire curtain path and the second fire curtain path are of fixed lengths. Forming the housing of the invention in this manner can provide the simplest construction. In such embodiments the adjusting means may be a simple bar or roller or other similar means that is appropriately positioned within the housing to provide the appropriate lengths of first curtain path and second curtain path.
In alternative embodiments of the invention the adjusting means is movable such that the relative length of the first curtain path and the second curtain path can be adjusted by moving the position of the adjusting means relative to the roller. This can allow the apparatus of the present invention to be adjusted to provide an appropriate compensation for any given set of critera. A movable adjusting means can be provided in any suitable manner. If the adjusting means is movable it may be manually or mechanically movable. If mechanically movable a suitable controller for controlling the movement of the adjusting means can be provided.
The adjusting means may be mounted on an actuator that can be operated to move the adjusting means relative to the axis of the roller in order to vary the length of the first fire curtain path relative to the length of the second fire curtain path. As will be readily understood, during such movement the adjusting means should be maintained substantially parallel to the longitudinal axis of the roller. Any suitable actuator can be used. The actuator may comprise a hinged arm that is attached at a first end to the housing and at a second end to the adjusting means such that the hinged arm can be rotated about a hinge to move the adjusting means relative to the roller. A hinge of a hinged arm may be provided at the first end of the arm, or at any point between the first end and the second end of the arm. The actuator of the present invention may comprise any suitable means for moving the adjusting means, for example a linear or rotary actuator. Alternatively, the actuator may be manually movable.
The adjusting means of the present invention may be any suitable means over which a fire curtain can pass without difficulty. The adjusting means should allow a fire curtain to be passed smoothly over an outer surface when the fire curtain is deployed from the roller; the adjusting means should not provide significant resistance to the deployment of a fire curtain. In embodiments of the invention the adjusting means may be a simple rounded bar. Alternatively, the adjusting means may be a roller over which a fire curtain can pass.
In embodiments of the present invention a first fire curtain is mounted on a first length of the roller; a second fire curtain is mounted on a second length of the roller; the first length of the roller overlaps with the second length of the roller along an overlapping length of the roller; the adjusting means extends parallel to the overlapping length of the roller; the first fire curtain is mounted to follow the first fire curtain path, and the second fire curtain is mounted to follow the second fire curtain path.
That is, in embodiments of the present invention a first fire curtain and a second fire curtain are provided on the roller and the first fire curtain and the second fire curtain have an overlapping length on the roller such that there is no gap between the first fire curtain and the second fire curtain. The adjusting means extends parallel to the overlapping length of the roller to allow the different lengths of the first fire curtain and the second fire curtain to be adjusted over the overlapping length to avoid the first fire curtain and the second fire curtain being deployed to different heights in an emergency situation.
The adjusting means may be provided only along the overlapping length of the roller. Alternatively, adjusting means may be provided along substantially the entire length of the first fire curtain and/or the second fire curtain. If the adjusting means is provided along the entire length of the first fire curtain and the second fire curtain then the adjusting means may extend along substantially the entire length of the roller.
In embodiments of the invention third, fourth, fifth, or more fire curtains may be provided and each fire curtain will have an overlapping length with an adjacent fire curtain. For example, a third fire curtain will have an overlapping length with a second fire curtain and a fifth fire curtain will have an overlapping length with a fourth fire curtain. In such embodiments an adjusting means may be provided for each overlapping length. Fire curtains that are not 113 immediately adjacent one another may follow the same fire curtain path. Therefore, even though an embodiment of the invention may have more than two fire curtains it is not essential to provide more than two different fire curtain paths or more than one adjusting means. For example, in an embodiment of the invention having a first, second, and third fire curtain the first and third fire curtains may both follow the first fire curtain path along overlapping lengths and the second fire curtain may follow the second fire curtain path along overlapping lengths.
In an embodiment of the invention having first, second, and third fire curtains the adjusting means may extend the length of the second fire curtain and thereby extend over the overlapping portions between the first fire curtain and the second fire curtain and between the second fire curtain and the third fire curtain.
The present invention also provides a method of adjusting the height of a deployed fire curtain deployed from a roller positioned within a housing comprising the step of moving an adjusting means to change the length of path the fire curtain must pass from the roller before exiting an exit slot of the housing. The method of the present invention can be implemented by a housing of the present invention wherein the adjusting means is mounted on an actuator that can be operated to move the adjusting means relative to the roller to adjust the length of a fire curtain path Further features and advantages of the present invention will be apparent from the embodiment of the invention that is shown in the drawings and is discussed below.
Drawings Figure 1 is a schematic of an embodiment of a housing according to the present invention having a first fire curtain and a second fire curtain, Figure 2 is a first cross-section of the overlapping length of the housing of Figure 1; and Figure 3 is a second cross-section of the overlapping length of the housing of Figure 1.
A housing 1 according to the present invention is shown in Figure 1. A first fire curtain 2 and a second fire curtain 3 are shown in Figure 1 fully deployed from the housing 1. That is, the first fire curtain 2 and the second fire curtain 3 have been fully lowered from the housing I. In order that there is no gap between the first fire curtain 2 and the second fire curtain 3 an overlapping portion 4 is provided wherein the first fire curtain 2 extends over the second fire curtain 3. As shown in Figure 1, the first fire curtain 2 has a length A, the second fire curtain 3 has a length B, and a height of the first fire curtain 2 is equal to a height of the second fire curtain 3.
A cross-section through the housing 1 is shown in Figures 2 and 3. The housing 1 comprises a cuboid top box 5 formed of steel in which a main roller 6 is mounted. The main roller 6 is mounted on a longitudinal axle 7. The roller 6 and the axle 7 extend a length of the housing L An exit slot 8 is formed in a lower wall of the top box 5, beneath the main roller 6, and also extends the length of the housing. The cross-section of Figures 2 and 3 is shown at the overlapping portion 4 of the housing I. Along this portion both the first fire curtain 2 and the second fire curtain 3 are wound on the main roller 6.
An adjuster 10 is provided within the top box 5. The adjuster 10 comprises an arm 11 having an adjusting roller 12 mounted at a second end and being mounted to an upper wall of the top box 5 at a first end by means of a hinge 13. An intermediate roller 14 is mounted on the adjuster 10 between the first end and the second end. The adjusting roller 12 is the adjusting means of the housing L The first fire curtain 2 and the second fire curtain 3 are wound on the main roller 6 and the adjusting roller 12 is positioned such that the first fire curtain 2 follows a first fire curtain path that is defined by the main roller 6 and the exit slot 8 and passes a first side of the adjusting roller 12 whilst the second fire curtain 3 follows a second fire curtain path that is defined by the main roller 6 and the exit slot and passes a second side of the adjusting roller 12. That is, over the overlapping length 4 the first fire curtain 2 is wound on the main roller outwardly of the second fire curtain 3 and passes a first side of the adjusting roller 12 before exiting the housing 1 via the exit slot 8. Over the overlapping length 4 the second fire curtain 3 is wound on the main roller inwardly of the first fire curtain 2 and passes a second side of the adjusting roller 12 before exiting the housing 1 via the exit slot 8.
The adjuster 10, including the adjusting roller 12, is shown in a first position in Figure 2 and in a second position in Figure 3. The adjuster is movable between the first position and the second position by means of a linear actuator (not shown).
By moving the adjuster 10 from the first position to the second position the relative lengths of the first fire curtain path and the second fire curtain path are varied. In particular, whilst the length of the first fire curtain path is substantially unchanged when the adjuster is moved from the first position to the second position the second fire curtain path is substantially lengthened.
In this manner, moving the adjuster between the first fire curtain path and the second fire curtain path can be used to appropriately alter the length of the first fire curtain path and the second fire curtain path. This can be done to adjust the height of the first and second fire curtains 2, 3 when they are deployed from the main roller 6.

Claims (9)

  1. Claims 1 A fire curtain housing comprising: a roller on which fire curtains may be mounted having a longitudinal axis; an exit slot parallel to the longitudinal axis of the roller; and an adjusting means maintained parallel to the longitudinal axis of the roller; wherein a first fire curtain path is defined by the roller and the exit slot and passes a first side of the adjusting means; and a second fire curtain path is defined by the roller and the exit slot and passes a second side of the adjusting means; wherein the adjusting means is positioned such that the length of the second fire curtain path is longer than the length of the first fire curtain path.
  2. 2. A fire curtain housing according to claim 1, wherein the adjusting means is a roller.
  3. 3. A fire curtain housing according to claim 1, wherein the adjusting means is a rounded bar.
  4. 4. A fire curtain housing according to any preceding claim, wherein the adjusting means is maintained in a fixed position relative to the roller.
  5. A fire curtain housing according to any of claims 1 to 3, wherein: the adjusting means is mounted on an actuator that can be operated to move the adjusting means relative to the axis of the roller to vary the length of the first fire curtain path relative to the length of the second fire curtain path.
  6. 6 A fire curtain housing according to claim 5, wherein the actuator comprises a hinged arm that is attached at a first end to the housing and at a second end to the adjusting means.
  7. 7 A fire curtain housing according to claim 5 or claim 6 further comprising means for moving the actuator between a first position and a second position.
  8. 8 A fire curtain housing according to any preceding claim, wherein: a first fire curtain is mounted on a first length of the roller; a second fire curtain is mounted on a second length of the roller; the first length of the roller overlaps with the second length of the roller along an overlapping length of the roller; the adjusting means extends parallel to the overlapping length of the roller; the first fire curtain is mounted to follow the first fire curtain path; and the second fire curtain is mounted to follow the second fire curtain path.
  9. 9 A fire curtain housing according to any preceding claim, further comprising a housing body containing the roller and the adjusting means and having the exit slot formed at a lower side.A fire curtain system comprising a fire curtain housing according to any preceding claim, a first fire curtain, and a second fire curtain 11 A method of adjusting the height of a deployed fire curtain deployed from a roller positioned within a housing comprising the step of moving an adjusting means to change the length of path the fire curtain must pass from the roller before exiting an exit slot of the housing.
GB1908483.9A 2019-06-13 2019-06-13 A fire curtain housing Active GB2584713B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1908483.9A GB2584713B (en) 2019-06-13 2019-06-13 A fire curtain housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1908483.9A GB2584713B (en) 2019-06-13 2019-06-13 A fire curtain housing

Publications (3)

Publication Number Publication Date
GB201908483D0 GB201908483D0 (en) 2019-07-31
GB2584713A true GB2584713A (en) 2020-12-16
GB2584713B GB2584713B (en) 2022-11-02

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ID=67432373

Family Applications (1)

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GB1908483.9A Active GB2584713B (en) 2019-06-13 2019-06-13 A fire curtain housing

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572200A1 (en) * 1992-05-23 1993-12-01 Colt International Holdings A.G. A smoke apron
CN2668808Y (en) * 2003-10-24 2005-01-05 亓峒和 Single-axle double-raid double-curtain inorganic composite fire-retardant rolling curtain
CN201318112Y (en) * 2008-11-11 2009-09-30 陈永安 Dual-rail and dual-curtain inorganic fire-resisting roller shutter with escape doors
RU2466761C1 (en) * 2011-07-15 2012-11-20 Закрытое акционерное общество "Теплоогнезащита" (ЗАО "Теплоогнезащита") Method of forming fire barrier and fire barrier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572200A1 (en) * 1992-05-23 1993-12-01 Colt International Holdings A.G. A smoke apron
CN2668808Y (en) * 2003-10-24 2005-01-05 亓峒和 Single-axle double-raid double-curtain inorganic composite fire-retardant rolling curtain
CN201318112Y (en) * 2008-11-11 2009-09-30 陈永安 Dual-rail and dual-curtain inorganic fire-resisting roller shutter with escape doors
RU2466761C1 (en) * 2011-07-15 2012-11-20 Закрытое акционерное общество "Теплоогнезащита" (ЗАО "Теплоогнезащита") Method of forming fire barrier and fire barrier

Also Published As

Publication number Publication date
GB201908483D0 (en) 2019-07-31
GB2584713B (en) 2022-11-02

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