EP3162977B1 - Roof skylight with raising leaf, in particular with smoke removal function - Google Patents
Roof skylight with raising leaf, in particular with smoke removal function Download PDFInfo
- Publication number
- EP3162977B1 EP3162977B1 EP16196247.7A EP16196247A EP3162977B1 EP 3162977 B1 EP3162977 B1 EP 3162977B1 EP 16196247 A EP16196247 A EP 16196247A EP 3162977 B1 EP3162977 B1 EP 3162977B1
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- EP
- European Patent Office
- Prior art keywords
- leaf
- frame
- rotary
- bracket
- skylight
- 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.)
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- 239000000779 smoke Substances 0.000 title description 8
- 230000007246 mechanism Effects 0.000 claims description 46
- 230000000873 masking effect Effects 0.000 claims description 13
- 238000005304 joining Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/03—Sky-lights; Domes; Ventilating sky-lights
- E04D13/035—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts
- E04D13/0358—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts moving, in their own plane, e.g. rolling or sliding, or moving in parallel planes with or without an additional movement, e.g. both pivoting and rolling or sliding
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/40—Suspension arrangements for wings supported on arms movable in vertical planes
- E05D15/42—Suspension arrangements for wings supported on arms movable in vertical planes with pivoted arms and horizontally-sliding guides
Definitions
- the present invention relates to a roof skylight according to claim 1 that can be used to transmit outside natural light into building interiors, which, apart from its interior illumination function, additionally can have a smoke removal function and may serve as ventilation or exhaust.
- the smoke removal function of the skylight is required in many industrial and public buildings and is characterized by largest possible opening or displacement of the leaf from the frame in order to facilitate the flow of the smoke to the outside of the building.
- the leaf is generally held in two positions: closed and open.
- skylights intended for use in flat roofs i.e. horizontal or low pitch roofs, comprising a frame and a moveable relative to the frame, leaf.
- a convex dome or a flat glazing, e.g. insulated glass unit may form the outer layer of the leaf.
- the movement of the leaf takes place through linear raising of the leaf generally orthogonally to the plane of the frame, which in case of a horizontal roof simultaneously constitutes vertical movement.
- the frame and the leaf have four sides and the orthogonal movement of the leaf is achieved via guiding mechanisms and drives which hold the leaf and the frame in varied distances relative to each other in a generally parallel position, i.e. with no change in mutual angular position.
- a skylight with a lightweight design is known from patent EP0979333 B1 ; it consists of a frame installed in the roof structure and a leaf orthogonally moveable relative to the frame.
- the frame and the leaf have four sides and the orthogonal movement of the leaf is achieved via a single leaf raising mechanism located in the middle of the span of the skylight.
- This solution may be used for lightweight designs of the leaf, with no high forces projected to act in the plane of the leaf. When the leaf is in the open position and the wind is strong there is a risk that it may be damaged, particularly if the force acts orthogonally to the plane in which the scissor mechanism operates. Moreover, there is no possibility to hide or camouflage mechanical elements, which reduces aesthetic value of the solution.
- a skylight consisting of a frame and a leaf moveable orthogonally relative to the frame is known from patent EP2385184 B1 , where the frame and the leaf have 4 sides and the orthogonal movement of the leaf is achieved via guiding means which hold the leaf and the frame in a generally parallel position relative to each other.
- Two rigid chain drives are placed symmetrically relative to the centre of the skylight and the movement of the leaf is guided and stabilized by scissor mechanisms on each of the four sides of the skylight. Both the scissor mechanisms and the chain drives are embedded in the voids in the plastic frame.
- a skylight with a raising leaf of such a design is a solution where standard profiles, utilized e.g. for typical non-opening skylights, can be used only to a limited extent. It would be desirable do propose such a design for a skylight with a raising leaf where manufacturing and installation costs could be reduced through utilizing as many standard elements, used in other skylight types and other components for joinery and window frames, as possible.
- JP 2000 017793 A discloses a roof skylight according to the preamble of claim 1.
- the purpose of the proposed solution is to introduce a roof skylight arranged for opening the leaf, generally orthogonally to the plane of installation of the frame, to a sufficient height, and use of said skylight with as a skylight with smoke removal function, wherein the leaf raising mechanism should be embedded as close to the frame and leaf elements as possible.
- the leaf rising mechanism should also enable its use in standard profiles for frame and leaf elements utilized in other skylight designs. Installation of the raising mechanism does not require any special preparation and machining of the frame and leaf elements.
- the skylight in a typical configuration has a generally rectangular or square shape and comprises a frame embedded in the roof structure and a moveable leaf emebede in said frame.
- the movement of the leaf preferably orthogonal relative to the plane of the frame, is achieved via at least two guiding mechanisms preferably placed symmetrically in skylight, and at least one drive, holding the leaf and the frame together in selected positions relative to each other, generally parallel, i.e. with no change in mutual angular position.
- the guiding mechanism generally utilizes a known solution known as a flat scissor mechanism, which, if the linear movement of the leaf is forced, uses two levers of equal length, connected to each other through articulated joints in their kinematic centres.
- Each lever is characterized by a rotary connection on one end and a rotary sliding connection on the other end.
- each of these elements In order to enable the movement raising the leaf over the frame, each of these elements must have one rotary connection and one rotary sliding connection. Both dependencies result in a mechanism in which the rotary sliding connections of both levers with the leaf and the frame occur opposite each other. If the torque of the leaf relative to the frame occurs in a limited fashion, the levers of the scissor mechanism transfer mainly the load in the plane of its operation. The aforementioned torque, and additionally lateral forces, occur mainly in designs where the direction in which the driving actuator operates is not parallel to the direction in which the leaf moves and in cases where the skylight is installed on a non-horizontal surface, e.g.
- the driving actuator in this manner is intentional and advantageous, since it reduces its height in the direction in which the leaf raises in the closed position and allows for lower profiles to be used, thereby reducing the height of the skylight.
- the design of the driving actuator should ensure sufficient protrusion in order to enable the leaf to be raised in such a way as to ensure proper smoke removal function of the skylight, i.e. have the most advantageous (the highest) possible air outflow coefficient.
- the skylight should be characterized by a compact design.
- the torque of the leaf relative to the frame also causes additional forces which act orthogonally to the plane of the scissor mechanism.
- a set of three or four scissor mechanisms is preferably utilized, of which at least one is in a plane non-parallel to the others, preferably orthogonal.
- the most stable system consists of such a number of scissor mechanisms as to form a pseudo-closed chain when viewed from the top. In case of a skylight with a rectangular profile this means using four scissor mechanisms, one on each side.
- Such configuration of scissor mechanisms enables asymmetrically applied raising force, i.e. characterized by non-zero net torque in the plane parallel to the plane of the skylight, to be utilized.
- the minimum number of actuators is one; however, this causes a considerable unbalance of forces and torques, which has to be countered by lever connections with handles in the frame and the leaf.
- Long-term operation of the skylight in this configuration causes the elements to wear more quickly, backlash and instability, especially in the raised position of the leaf.
- Operating practice shows that the optimal solution, considering the cost and functionality, consists of two actuators, placed as symmetrically as possible, and three or four scissor mechanisms, preferably placed on each side of the skylight.
- the drive set used should be characterized by zero net torque and minimal forces acting in the plane parallel to the plane of the skylight. This may be achieved through a system of at least three actuators arranged diagonally, forming a spatial balanced system of forces, in which the direction in which the actuators operate is not parallel to the direction in which the leaf is raised.
- a system of at least three actuators, operating in the direction in which the leaf is raised may be utilized, provided one of their ends is embedded in a non-rotary manner in the frame or in the leaf. It is important to choose the location, embedding and direction in which the actuators operate in such a way that, regardless of the direction of the load, the degree of freedom of the leaf is limited to only linear movement orthogonally to the plane of the skylight.
- the system in such configurations could generally function without scissor mechanisms, but due to relatively high cost of the actuators this is rarely utilized.
- a much cheaper and more functional solution is to use actuators as drives and scissor mechanisms as systems for stabilizing and limiting the degree of freedom of the leaf.
- the leaf can generally be held relative to the frame in a closed position or in an open position. In the closed position the leaf is embedded in the frame and the scissor mechanisms and driving actuators are not under load. In the open position, if horizontal component forces occur generating torque of the leaf relative to the frame, the entire load related to the leaf is transferred via the driving actuators and scissor mechanisms.
- a roof skylight is proposed according to claim 1.
- the essence of the solution as per the proposed invention is a set of elements generally comprising a bottom bracket fixed to the frame element and a top bracket fixed to the leaf element or to the supporting frame of the dome, serving as supporting elements for the rotary and rotary sliding embedding of both levers of the scissor mechanism and additionally rotary embedding of the actuator if it is projected for installation.
- the scissor mechanism and elements of the installation kit are preferably made from a material with a high mechanical strength, primarily flexural strength, e.g.
- the bottom bracket is fixed to the inner edge of the frame element and should have a sufficiently large contact area with the surface of the frame element and an appropriate amount of fasteners, so that the transferred load does not damage the frame element, which is typically made from plastic or, more rarely, wooden profiles.
- the bottom bracket may, on the inner side of the frame, adjoin the surface of the roof structure if the hole in the roof is preferably smaller than the inner outline of the frame.
- the top bracket is fixed to the inner side of the leaf or the supporting frame of the skylight. The essence of the solution is placing the set of elements, i.e. the scissor mechanism, driving actuator, bottom bracket and top bracket, on the inner side of the frame and leaf elements.
- the above description pertains to a single selected set, comprising installation kit, scissor mechanism and driving actuator, intended for one of the sides of the skylight.
- the number of sets used for a skylight should take into account the conditions relating to the structural stability given above, stemming from, among others, the mass of the leaf being raised and additional load, e.g. snow, as well as projected effect of air movement outside of the building.
- mechanical elements are preferably hidden by covers fixed to the bottom bracket on the inner side. Apart from the aforementioned function, the covers are characterized by ease of installation and removal, thereby providing convenient and easy access to mechanical elements of the skylight, e.g. in case repair or maintenance is necessary.
- Masking plates or lining whose upper edge is preferably adjusted to the shape and position of the glazing of the leaf or the dome in the closed position of the skylight, may be utilized as covers. If in a given skylight design the covers would protrude too much over the frame, causing e.g. increased resistance for air outflow, they may be divided into a part fixed to the frame and a part fixed to the leaf, or covering the mechanisms near the leaf may be forgone. In the closed position the leaf is preferably embedded in the brim of the frame, and between the masking covers and the surface of the glazing of the skylight there is a preferably small gap, which takes manufacturing and installation imperfections, as well as thermal expansion, into account.
- the proposed solution as per the invention requires no special design and preparatory machining of the frame and leaf elements and may be utilized both for new skylights, using current technology, as well as for skylights which are already in operation, whose functionality may be extended to openable skylights or skylights with smoke removal function.
- the advantage of such a solution is a considerable reduction in cost of manufacturing skylights.
- the roof skylight in the proposed embodiment consisting of four sides arranged in a rectangular system, preferably square, in a configuration with four scissor mechanisms, one for each side of the skylight, and four driving actuators, two symmetrically for opposite sides of the skylight, is graphically presented in the drawings:
- a skylight as per the invention comprising a frame 1 and a leaf 2, raised orthogonally relative to the frame 1.
- the frame 1 and the leaf 2 have four sides forming a closed rectangular shape, preferably with equal sides, generally made from plastic profiles.
- the movement of the leaf 2 is guided and stabilized by four scissor mechanisms 3, one for each side of the frame and the leaf, operating in a plane orthogonal to the plane of the frame 1 and in parallel to the side by which they are fixed.
- the movement of the leaf is achieved via four driving actuators 4, installed symmetrically, preferably in parallel planes, in an angular position relative to the direction in which the leaf is raised, two for opposite sides of the frame 1 and corresponding sides of the leaf 2.
- the scissor mechanism 3, as well as driving actuators 4, if present, are, consistently on each side of the skylight, connected with the frame 1 through a bottom bracket 5 fixed to the element of the frame 1.
- the bottom bracket 5 is generally a channel section with an inner arm 51, an arm 52 adjoining the inner surface 11 of the frame 1 and a connector 53, whose surface is generally parallel to the plane of the frame 1.
- the shape of the profile and the inclination of the adjoining arm 52 imitates the shape and inclination of the inner surface 11 of the frame 1, to which the bottom bracket 5 is fixed.
- the bottom bracket 5 constitutes a closed gutter preferably on the entire perimeter of the frame 1, on its inner side.
- a bottom guide 7 for rotary sliding connection of the lever 31 of the scissor mechanism 3 and articulated brackets 55 for rotary connection of the linear actuator 4, if one is installed on the selected side of the skylight, are embedded on and fixed to the connector 53 of the bottom bracket 5, using typical joining means.
- One lever 31' of the scissor mechanism 3 has a rotary-sliding connection with the bottom guide 7 achieved via an articulated slider 32'.
- the rotary connection of second lever 31" of the scissor mechanism 3 with the bottom guide 7 is achieved via an articulated slider 32" with sliding blocked by a bolt 33 crossing coaxial holes in the bottom guide 7 and the second lever 31".
- the levers 31', 31" of the scissor mechanism 3 are preferably made from steel flat bars.
- the top brackets 6 are the elements which connect the driving actuators 4 with the leaf. They are generally embedded in the corners between the elements 21 of the leaf 2 and generally fixed to both leaf elements 21 via retaining arms 61 using typical joining means, e.g. screws.
- An articulated bracket 62 for rotary connection of the driving actuator 4 is mounted on one of the retaining arms 61.
- the articulated bracket 62 is mounted using the same joining means by which the retaining arm is fixed to the frame 2 elements 21, utilizing coaxial mounting holes.
- the top guide 8 is generally a longitudinal profile, with a retaining arm 81 and a guiding profile 82 for fixing the top guide 8 to the frame 2 element 21 using typical joining means.
- the top guide 8 has an identical function as the bottom guide 7 and preferably the same elements are used for rotary-sliding and rotary connections of the lever 31', 31" of the scissor mechanism 3, i.e. an articulated slider 32' for rotary sliding connection and an articulated slider 32' blocked by a bolt 33 for rotary connection.
- the skylight has masking plates 9, generally on the entire perimeter, fixed to the inner arm 51 of the bottom bracket 5.
- the height of the masking plates 9 in the direction of the leaf 2 is chosen in such a way as to effectively hide mechanical elements from view and at the same time not create additional factor of increased resistance for air outflow. For this reason, the height of the masking plates 9 is reduced and masking strips 10, preferably plastic, fixed to the leaf 2, fulfil the masking function in the space not covered by the masking plates 9.
- the masking plates 9 and the masking strips 10 are next to each other or there is a small tuck between them, thus they completely cover the view of mechanical parts from within the skylight.
- the mutual height of the masking plates 9 and the masking strips 10 should take manufacturing and installation imperfections and varied thermal expansion of the skylight elements into account, so that they do not interfere with the ability to close the skylight tightly.
- the control system for the driving actuators 4 provides at least three predefined positions of the height to which the leaf 2 is raised.
- the closed position of the leaf 2 is the first of them.
- Ventilation position is the second: the leaf 2 is raised to a small height so as to enable the flow of air, but at the same time prevent access by unauthorized persons from the outside.
- the alarm position, the smoke removal position, is the third; here, the leaf 2 is raised to maximum height.
- the skylight as per proposed invention is characterized by displacement of the elements of the frame 1 and leaf 2 from the exhaust outlet, which results in improved thermal performance.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Catching Or Destruction (AREA)
Description
- The present invention relates to a roof skylight according to
claim 1 that can be used to transmit outside natural light into building interiors, which, apart from its interior illumination function, additionally can have a smoke removal function and may serve as ventilation or exhaust. - The smoke removal function of the skylight is required in many industrial and public buildings and is characterized by largest possible opening or displacement of the leaf from the frame in order to facilitate the flow of the smoke to the outside of the building. The leaf is generally held in two positions: closed and open. Generally, skylights intended for use in flat roofs, i.e. horizontal or low pitch roofs, comprising a frame and a moveable relative to the frame, leaf. A convex dome or a flat glazing, e.g. insulated glass unit, may form the outer layer of the leaf. In a skylight with a raising leaf, which constitutes the present invention, the movement of the leaf takes place through linear raising of the leaf generally orthogonally to the plane of the frame, which in case of a horizontal roof simultaneously constitutes vertical movement. In a typical configuration the frame and the leaf have four sides and the orthogonal movement of the leaf is achieved via guiding mechanisms and drives which hold the leaf and the frame in varied distances relative to each other in a generally parallel position, i.e. with no change in mutual angular position.
- A skylight with a lightweight design is known from patent
EP0979333 B1 ; it consists of a frame installed in the roof structure and a leaf orthogonally moveable relative to the frame. The frame and the leaf have four sides and the orthogonal movement of the leaf is achieved via a single leaf raising mechanism located in the middle of the span of the skylight. This solution may be used for lightweight designs of the leaf, with no high forces projected to act in the plane of the leaf. When the leaf is in the open position and the wind is strong there is a risk that it may be damaged, particularly if the force acts orthogonally to the plane in which the scissor mechanism operates. Moreover, there is no possibility to hide or camouflage mechanical elements, which reduces aesthetic value of the solution. - A skylight consisting of a frame and a leaf moveable orthogonally relative to the frame is known from patent
EP2385184 B1 , where the frame and the leaf have 4 sides and the orthogonal movement of the leaf is achieved via guiding means which hold the leaf and the frame in a generally parallel position relative to each other. Two rigid chain drives are placed symmetrically relative to the centre of the skylight and the movement of the leaf is guided and stabilized by scissor mechanisms on each of the four sides of the skylight. Both the scissor mechanisms and the chain drives are embedded in the voids in the plastic frame. This solution ensures that the design is aesthetically pleasing, but, due to the necessity of adapting the design of the skylight for installing mechanisms and drives, it requires additional structural elements and fixings as well as removal machining of the frame and leaf elements of the skylight in order to create mounting sockets. A skylight with a raising leaf of such a design is a solution where standard profiles, utilized e.g. for typical non-opening skylights, can be used only to a limited extent. It would be desirable do propose such a design for a skylight with a raising leaf where manufacturing and installation costs could be reduced through utilizing as many standard elements, used in other skylight types and other components for joinery and window frames, as possible. -
JP 2000 017793 A claim 1. - The purpose of the proposed solution is to introduce a roof skylight arranged for opening the leaf, generally orthogonally to the plane of installation of the frame, to a sufficient height, and use of said skylight with as a skylight with smoke removal function, wherein the leaf raising mechanism should be embedded as close to the frame and leaf elements as possible. The leaf rising mechanism should also enable its use in standard profiles for frame and leaf elements utilized in other skylight designs. Installation of the raising mechanism does not require any special preparation and machining of the frame and leaf elements.
- The skylight in a typical configuration has a generally rectangular or square shape and comprises a frame embedded in the roof structure and a moveable leaf emebede in said frame. The movement of the leaf, preferably orthogonal relative to the plane of the frame, is achieved via at least two guiding mechanisms preferably placed symmetrically in skylight, and at least one drive, holding the leaf and the frame together in selected positions relative to each other, generally parallel, i.e. with no change in mutual angular position. The guiding mechanism generally utilizes a known solution known as a flat scissor mechanism, which, if the linear movement of the leaf is forced, uses two levers of equal length, connected to each other through articulated joints in their kinematic centres. Each lever is characterized by a rotary connection on one end and a rotary sliding connection on the other end. In order to enable the movement raising the leaf over the frame, each of these elements must have one rotary connection and one rotary sliding connection. Both dependencies result in a mechanism in which the rotary sliding connections of both levers with the leaf and the frame occur opposite each other. If the torque of the leaf relative to the frame occurs in a limited fashion, the levers of the scissor mechanism transfer mainly the load in the plane of its operation. The aforementioned torque, and additionally lateral forces, occur mainly in designs where the direction in which the driving actuator operates is not parallel to the direction in which the leaf moves and in cases where the skylight is installed on a non-horizontal surface, e.g. a roof with a slight pitch. Arranging the driving actuator in this manner is intentional and advantageous, since it reduces its height in the direction in which the leaf raises in the closed position and allows for lower profiles to be used, thereby reducing the height of the skylight. At the same time, the design of the driving actuator should ensure sufficient protrusion in order to enable the leaf to be raised in such a way as to ensure proper smoke removal function of the skylight, i.e. have the most advantageous (the highest) possible air outflow coefficient. Moreover, taking into account transport, storage and installation, the skylight should be characterized by a compact design.
- The torque of the leaf relative to the frame also causes additional forces which act orthogonally to the plane of the scissor mechanism. In order to minimise the lateral forces, a set of three or four scissor mechanisms is preferably utilized, of which at least one is in a plane non-parallel to the others, preferably orthogonal. The most stable system consists of such a number of scissor mechanisms as to form a pseudo-closed chain when viewed from the top. In case of a skylight with a rectangular profile this means using four scissor mechanisms, one on each side. Such configuration of scissor mechanisms enables asymmetrically applied raising force, i.e. characterized by non-zero net torque in the plane parallel to the plane of the skylight, to be utilized. The minimum number of actuators is one; however, this causes a considerable unbalance of forces and torques, which has to be countered by lever connections with handles in the frame and the leaf. Long-term operation of the skylight in this configuration causes the elements to wear more quickly, backlash and instability, especially in the raised position of the leaf. Operating practice shows that the optimal solution, considering the cost and functionality, consists of two actuators, placed as symmetrically as possible, and three or four scissor mechanisms, preferably placed on each side of the skylight.
- In order to reduce the torque of the leaf relative to the frame while it is being raised, the drive set used should be characterized by zero net torque and minimal forces acting in the plane parallel to the plane of the skylight. This may be achieved through a system of at least three actuators arranged diagonally, forming a spatial balanced system of forces, in which the direction in which the actuators operate is not parallel to the direction in which the leaf is raised. Alternatively, a system of at least three actuators, operating in the direction in which the leaf is raised, may be utilized, provided one of their ends is embedded in a non-rotary manner in the frame or in the leaf. It is important to choose the location, embedding and direction in which the actuators operate in such a way that, regardless of the direction of the load, the degree of freedom of the leaf is limited to only linear movement orthogonally to the plane of the skylight.
- The system in such configurations could generally function without scissor mechanisms, but due to relatively high cost of the actuators this is rarely utilized. Moreover, a much cheaper and more functional solution is to use actuators as drives and scissor mechanisms as systems for stabilizing and limiting the degree of freedom of the leaf. The leaf can generally be held relative to the frame in a closed position or in an open position. In the closed position the leaf is embedded in the frame and the scissor mechanisms and driving actuators are not under load. In the open position, if horizontal component forces occur generating torque of the leaf relative to the frame, the entire load related to the leaf is transferred via the driving actuators and scissor mechanisms.
- A roof skylight is proposed according to
claim 1. - The essence of the solution as per the proposed invention is a set of elements generally comprising a bottom bracket fixed to the frame element and a top bracket fixed to the leaf element or to the supporting frame of the dome, serving as supporting elements for the rotary and rotary sliding embedding of both levers of the scissor mechanism and additionally rotary embedding of the actuator if it is projected for installation. There are generally two types of sets of elements fixed to each side of the skylight in the proposed solution: active with a driving actuator and a scissor mechanism and passive without a driving actuator. The scissor mechanism and elements of the installation kit are preferably made from a material with a high mechanical strength, primarily flexural strength, e.g. steel or composite materials, and furthermore should be characterized by resistance to changing weather conditions. The bottom bracket is fixed to the inner edge of the frame element and should have a sufficiently large contact area with the surface of the frame element and an appropriate amount of fasteners, so that the transferred load does not damage the frame element, which is typically made from plastic or, more rarely, wooden profiles. Furthermore, the bottom bracket may, on the inner side of the frame, adjoin the surface of the roof structure if the hole in the roof is preferably smaller than the inner outline of the frame. Similarly, the top bracket is fixed to the inner side of the leaf or the supporting frame of the skylight. The essence of the solution is placing the set of elements, i.e. the scissor mechanism, driving actuator, bottom bracket and top bracket, on the inner side of the frame and leaf elements.
- The above description pertains to a single selected set, comprising installation kit, scissor mechanism and driving actuator, intended for one of the sides of the skylight. The number of sets used for a skylight should take into account the conditions relating to the structural stability given above, stemming from, among others, the mass of the leaf being raised and additional load, e.g. snow, as well as projected effect of air movement outside of the building. In order to maintain high aesthetic value, mechanical elements are preferably hidden by covers fixed to the bottom bracket on the inner side. Apart from the aforementioned function, the covers are characterized by ease of installation and removal, thereby providing convenient and easy access to mechanical elements of the skylight, e.g. in case repair or maintenance is necessary. Masking plates or lining, whose upper edge is preferably adjusted to the shape and position of the glazing of the leaf or the dome in the closed position of the skylight, may be utilized as covers. If in a given skylight design the covers would protrude too much over the frame, causing e.g. increased resistance for air outflow, they may be divided into a part fixed to the frame and a part fixed to the leaf, or covering the mechanisms near the leaf may be forgone. In the closed position the leaf is preferably embedded in the brim of the frame, and between the masking covers and the surface of the glazing of the skylight there is a preferably small gap, which takes manufacturing and installation imperfections, as well as thermal expansion, into account.
- The proposed solution as per the invention requires no special design and preparatory machining of the frame and leaf elements and may be utilized both for new skylights, using current technology, as well as for skylights which are already in operation, whose functionality may be extended to openable skylights or skylights with smoke removal function. The advantage of such a solution is a considerable reduction in cost of manufacturing skylights.
- The roof skylight in the proposed embodiment, consisting of four sides arranged in a rectangular system, preferably square, in a configuration with four scissor mechanisms, one for each side of the skylight, and four driving actuators, two symmetrically for opposite sides of the skylight, is graphically presented in the drawings:
-
Fig. 1 - The skylight in the open position - axonometric projection with removed fragments. -
Fig. 2a - The skylight in the open position - cross section through the middle, with a background view of a side with two driving actuators. -
Fig. 2b - The skylight in the open position - cross section through the middle, with a background view of a side without driving actuators. -
Fig. 3 - An example set of mechanical elements of the skylight, generally comprising: scissor mechanism, two symmetrically placed driving actuators, installation kit, articulated brackets and guides - axonometric projection. -
Fig. 4 - The skylight in the closed position - cross section through the middle, with a background view of a side with two driving actuators. - A skylight as per the invention comprising a
frame 1 and aleaf 2, raised orthogonally relative to theframe 1. Theframe 1 and theleaf 2 have four sides forming a closed rectangular shape, preferably with equal sides, generally made from plastic profiles. The movement of theleaf 2 is guided and stabilized by fourscissor mechanisms 3, one for each side of the frame and the leaf, operating in a plane orthogonal to the plane of theframe 1 and in parallel to the side by which they are fixed. The movement of the leaf is achieved via fourdriving actuators 4, installed symmetrically, preferably in parallel planes, in an angular position relative to the direction in which the leaf is raised, two for opposite sides of theframe 1 and corresponding sides of theleaf 2. Such arrangement of the drivingactuators 4, if the skylight is placed horizontally (vertical movement of the leaf 2), guarantees reduction in net lateral forces stemming from the load caused by the mass of theleaf 2 when the skylight is placed horizontally. The loads stemming from e.g. wind, snow or the fact that the skylight is inclined due to being installed on a slightly pitched roof are transferred mainly by a set of fourscissor mechanisms 3. - The
scissor mechanism 3, as well as drivingactuators 4, if present, are, consistently on each side of the skylight, connected with theframe 1 through abottom bracket 5 fixed to the element of theframe 1. Thebottom bracket 5 is generally a channel section with aninner arm 51, anarm 52 adjoining theinner surface 11 of theframe 1 and aconnector 53, whose surface is generally parallel to the plane of theframe 1. The shape of the profile and the inclination of the adjoiningarm 52 imitates the shape and inclination of theinner surface 11 of theframe 1, to which thebottom bracket 5 is fixed. Thebottom bracket 5 constitutes a closed gutter preferably on the entire perimeter of theframe 1, on its inner side. Abottom guide 7 for rotary sliding connection of thelever 31 of thescissor mechanism 3 and articulatedbrackets 55 for rotary connection of thelinear actuator 4, if one is installed on the selected side of the skylight, are embedded on and fixed to theconnector 53 of thebottom bracket 5, using typical joining means. - One lever 31' of the
scissor mechanism 3 has a rotary-sliding connection with thebottom guide 7 achieved via an articulated slider 32'. The rotary connection ofsecond lever 31" of thescissor mechanism 3 with thebottom guide 7 is achieved via an articulatedslider 32" with sliding blocked by abolt 33 crossing coaxial holes in thebottom guide 7 and thesecond lever 31". Thelevers 31', 31" of thescissor mechanism 3 are preferably made from steel flat bars. - The
top brackets 6 are the elements which connect the drivingactuators 4 with the leaf. They are generally embedded in the corners between theelements 21 of theleaf 2 and generally fixed to bothleaf elements 21 via retainingarms 61 using typical joining means, e.g. screws. An articulatedbracket 62 for rotary connection of the drivingactuator 4 is mounted on one of the retainingarms 61. The articulatedbracket 62 is mounted using the same joining means by which the retaining arm is fixed to theframe 2elements 21, utilizing coaxial mounting holes. - The
top guide 8 is generally a longitudinal profile, with a retainingarm 81 and a guidingprofile 82 for fixing thetop guide 8 to theframe 2element 21 using typical joining means. Thetop guide 8 has an identical function as thebottom guide 7 and preferably the same elements are used for rotary-sliding and rotary connections of thelever 31', 31" of thescissor mechanism 3, i.e. an articulated slider 32' for rotary sliding connection and an articulated slider 32' blocked by abolt 33 for rotary connection. - Mainly for aesthetic purposes, the skylight has masking
plates 9, generally on the entire perimeter, fixed to theinner arm 51 of thebottom bracket 5. The height of themasking plates 9 in the direction of theleaf 2 is chosen in such a way as to effectively hide mechanical elements from view and at the same time not create additional factor of increased resistance for air outflow. For this reason, the height of themasking plates 9 is reduced and masking strips 10, preferably plastic, fixed to theleaf 2, fulfil the masking function in the space not covered by themasking plates 9. When theleaf 2 is in the closed position, themasking plates 9 and the masking strips 10 are next to each other or there is a small tuck between them, thus they completely cover the view of mechanical parts from within the skylight. The mutual height of themasking plates 9 and the masking strips 10 should take manufacturing and installation imperfections and varied thermal expansion of the skylight elements into account, so that they do not interfere with the ability to close the skylight tightly. - In order to increase the versatility of the proposed skylight, the control system for the driving
actuators 4 provides at least three predefined positions of the height to which theleaf 2 is raised. The closed position of theleaf 2 is the first of them. Ventilation position is the second: theleaf 2 is raised to a small height so as to enable the flow of air, but at the same time prevent access by unauthorized persons from the outside. The alarm position, the smoke removal position, is the third; here, theleaf 2 is raised to maximum height. - The skylight as per proposed invention is characterized by displacement of the elements of the
frame 1 andleaf 2 from the exhaust outlet, which results in improved thermal performance.
Claims (14)
- A roof skylight, comprising- a frame (1) for embedding in a roof structure, in particular a flat roof, and- a moveable leaf (2) embeded in said frame (1), where the leaf (2) is arranged to be raised orthogonally relative to the frame (1) and held in selected distance from the frame (1), generally in a position parallel to the frame,- the frame (1) and the leaf (2) have at least three, preferably four, sides forming a closed shape,- at least two scissor mechanisms (3) each one comprises two levers of equal length, connected to each other through articulated joints in their kinematic centres, and each lever comprises one rotary connection with the frame (1) or the leaf (2) on one end and one rotary sliding connection with the leaf (2) or the frame (1) respectively on the other end, said scissor mechanisms (3) are arranged to move the leaf (2) relative to the frame (1), where said scissor mechanisms (3) are placed individually on the sides of the skylight, for which individually the plane of operation is generally parallel to the adjacent side of the skylight,- at least one driving actuator (4) arranged to move the leaf, where said driving actuator having a rotary connection with the frame and the leaf,characterized in that the skylight comprises a bottom bracket (5) and a top bracket (6) as supporting elements for the rotary and the rotary sliding connections of both levers of each scissor mechanism (3) and the rotary connections of the actuator (4), where said bottom bracket (5) is fixedly embedded on the inner side of the frame (1), and the top bracket (6) is fixedly embeded on the inner side of the leaf (2), for providing a movable connection of the leaf (2) relative to the frame (1).
- A roof skylight according to claim 1, characterized in that the bottom bracket (5) is generally a channel section with an inner arm (51), an adjoining arm (52) to the frame (1) and a connector (53), where the connector (53) surface is generally parallel to the plane of the frame (1).
- A roof skylight according to claim 2, characterized in that the adjoining arm (52) is a profile with shape and inclination which matches shape and inclination of the inner surface (11) of the frame (1), to which the bottom bracket (5) is fixed.
- A roof skylight according to claim 1-2, characterized in that the bottom bracket (5) constitutes a closed gutter generally on the entire perimeter of the frame (1).
- A roof skylight according to claim 1 characterised in that a bottom guide (7) in the bottom bracket (5) is located and a top guide (8) in the top bracket (6) is located.
- A roof skylight according to claim 2 and 5, characterized in that the bottom guide (7) and a articulated brackets (55) are fixed to the connector (53) of the bottom bracket (5), and the driving actuator (4) is in rotary connection with said articulated bracket (55).
- A roof skylight according to claim 1 characterized in that the scissor machanism comprising one lever (31') and second lever (31") connected to each other through articulated joints in their kinematic centres.
- A roof skylight according to claim 5 and 7 characterized in that the one lever (31') is in rotary-sliding connection and the second lever (31") is in rotary connection with said bottom guide (7).
- A roof skylight according to claims 5 and 7 characterized in that one lever (31') is in rotary-sliding connection and the second lever (31") is in rotary connection with said top guide (8).
- A roof skylight according to claims 5 or 9 characterized in that the top guide (8) is longitudinal profile and comprises a guiding profile (82) and a retaining arm (81) for fixing the top guide (8) to the leaf (2) element (21).
- A roof skylight according to claim 1 characterized in that the top brackets (6) are embedded in the corners between the leaf elements (21) and are fixed to one or both adjacent leaf elements (21) via retaining arms (61) by joining means.
- A roof skylight as per claim 11, characterized in that the retaining arm (61) of the top bracket (6) constitutes a base and has means for fixing the articulated bracket (62), and the actuator (4) is arranged to be in rotary connection with said articulated bracket (62).
- A roof skylight according to claims 8 and 9, characterized in that the rotary-sliding connection of the scissor mechanism (3) with the top guide (8) and bottom guide (7) is achieved via an articulated slider (32'), and the rotary connection of the scissor mechanism (3) with the top guide (8) and bottom guide (7) is achieved via an articulated slider (32") with blocked sliding function by bolt 33 arranged for crossing coaxial holes in the bottom guide (7) and the lever (31).
- A roof skylight according to claim 2 characterized in that the inner arm (51) of the bottom bracket constitutes a base for fixing masking plates (9), preferably on the entire perimeter of the frame (1), with a height in the direction of the leaf (2) not exceeding the distance to the glazing of the leaf (2) in the closed position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL414578A PL230248B1 (en) | 2015-10-28 | 2015-10-28 | Rooflight with lifted sash, preferably with smoke extraction function |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3162977A1 EP3162977A1 (en) | 2017-05-03 |
EP3162977B1 true EP3162977B1 (en) | 2018-04-11 |
Family
ID=57211372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16196247.7A Active EP3162977B1 (en) | 2015-10-28 | 2016-10-28 | Roof skylight with raising leaf, in particular with smoke removal function |
Country Status (2)
Country | Link |
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EP (1) | EP3162977B1 (en) |
PL (1) | PL230248B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3859094A1 (en) * | 2020-02-03 | 2021-08-04 | VKR Holding A/S | A skylight window for being installed in a roof of a building |
CN114991395A (en) * | 2022-04-21 | 2022-09-02 | 富美建设集团有限公司 | Integrated roof of green building |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60223559A (en) * | 1984-04-20 | 1985-11-08 | 中央発條株式会社 | Skylight |
FR2747413B1 (en) * | 1996-04-12 | 1998-08-21 | Cronier Applic | SMOKE OUTLET FOR AN EXTENDED BENT VAULT |
FR2762867B1 (en) | 1997-04-30 | 1999-07-09 | Ecodis Sa | DEVICE FOR ARTICULATING A COUPOLE ON A COST OF A LAMB |
JP2000017793A (en) * | 1998-06-29 | 2000-01-18 | Takafumi Endo | Top light |
PL2231977T3 (en) * | 2007-12-19 | 2017-10-31 | Vkr Holding As | A window, a method for mounting a window, and a window including a set of parts |
PL2385184T3 (en) | 2010-05-07 | 2015-12-31 | Vkr Holding As | Skylight with operator for vertical opening movement |
-
2015
- 2015-10-28 PL PL414578A patent/PL230248B1/en unknown
-
2016
- 2016-10-28 EP EP16196247.7A patent/EP3162977B1/en active Active
Non-Patent Citations (1)
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None * |
Also Published As
Publication number | Publication date |
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EP3162977A1 (en) | 2017-05-03 |
PL230248B1 (en) | 2018-10-31 |
PL414578A1 (en) | 2017-05-08 |
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