EP2141316A1 - Improvement to actuators - Google Patents
Improvement to actuators Download PDFInfo
- Publication number
- EP2141316A1 EP2141316A1 EP08425461A EP08425461A EP2141316A1 EP 2141316 A1 EP2141316 A1 EP 2141316A1 EP 08425461 A EP08425461 A EP 08425461A EP 08425461 A EP08425461 A EP 08425461A EP 2141316 A1 EP2141316 A1 EP 2141316A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator according
- chain
- actuator
- blocking
- movable
- 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
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
- E05F15/619—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using flexible or rigid rack-and-pinion arrangements
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/72—Power-operated mechanisms for wings with automatic actuation responsive to emergency conditions, e.g. fire
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/218—Holders
- E05Y2201/22—Locks
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
- E05Y2201/43—Motors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/60—Suspension or transmission members; Accessories therefor
- E05Y2201/622—Suspension or transmission members elements
- E05Y2201/71—Toothed gearing
- E05Y2201/722—Racks
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/52—Safety arrangements associated with the wing motor
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/25—Emergency conditions
- E05Y2800/254—Emergency conditions the elements not functioning in case of emergency
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/40—Physical or chemical protection
- E05Y2800/414—Physical or chemical protection against high or low temperatures
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/40—Physical or chemical protection
- E05Y2800/42—Physical or chemical protection against smoke or gas
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
- E05Y2800/67—Materials; Strength alteration thereof
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/148—Windows
Definitions
- the invention relates to an actuator, in particular to an actuator having, associated with it, a member movable with a translational movement and generally consisting of a chain or a rack, for connection to a frame or the like.
- the invention relates to an actuator intended for fire-prevention systems.
- the chain is housed inside a casing which is generally supported by two side arms of a fixing bracket mounted on the frame.
- the chain actuator comprises an electric motor which, by means of gears, engages with and moves a chain.
- the chain has one end which always remains inside the casing, while the other end is fastened to the movable part of the frame which it reaches via an opening in the said casing.
- the chain may be wound completely inside the casing occupying a minimum amount of space.
- the chain causes opening or closing of the window.
- Rack actuators are based on a similar operating principle, except that operation of the motor in both senses, and therefore of the gearing associated with it, causes the displacement in both directions of a linear rack which has one end fixed to a component to be actuated.
- the actuators referred to operate without problems at room temperature, including also particularly hot and humid environments.
- the windows or more generally the evacuation devices must be blocked in positions determined by a smoke and heat evacuation control unit which causes opening and closing of the windows depending on the direction of the wind.
- control unit will cause closing of the east-facing windows and opening of the west-facing windows.
- the German patent No. 19534614 discloses chain actuators for windows where, in particular temperature conditions, the gearing which moves the chain is blocked by suitable bimetallic blocking means so as to keep the window in the open state and allow the smoke to escape.
- This solution has the main drawback that it allows, if necessary, operation of the window or the like to be blocked in one direction only, in particular in the direction corresponding to closing of the window.
- the unidirectional control system does not exclude the possibility of the mechanism being able to be operated in the opposite direction to the blocking direction, something which, among other things, clearly does not comply with the activity stipulated in the abovementioned regulations.
- the object of the present invention is to provide an improved actuator so as to overcome the drawbacks of the prior art.
- an actuator housed inside a casing having, associated with it, a member movable with a translational movement for connection to a fixture or the like, in accordance with that described in Claim 1.
- Figure 1 shows a portion of the actuator according to a first embodiment of the invention, in particular a chain actuator.
- the actuator 1 is housed inside a casing having, associated with it, a member movable with a translational movement, in particular a chain 3 for connection to a fixture or the like.
- the chain 3 is, for example, composed of a certain number of links 3A which are coupled to each other by means of bushes 6.
- the housing is composed of a box-like body 10, provided with a side opening 9 for allowing the chain 3 to pass outside, and a corresponding cover; in Figure 1 the cover has been removed so as to allow better viewing of the components inside the actuator 1.
- An electric motor 4 transmits a rotary movement to the chain 3, by means of a set of gears, the number of which may vary depending on the design envisaged and only the gearwheel 5 of which, which is the gear of the set furthest from the electric motor 4, is shown in Figure 1 ; the gearwheel 5 engages with and moves with its teeth the chain 3 which is displaceable inside the casing guided by a metal stud (not shown in the figures) inserted in the first link of the chain which facilitates the travel thereof along at least one slot formed in the bottom of the box 10 or in the opposite chain containing member.
- a cartridge 11 is provided according to the invention inside the box-shaped body 10, opposite the side outlet opening 9, said cartridge 11 comprising suitable blocking means 7 arranged perpendicularly with respect to the chain 3 and designed to block the movement thereof.
- the cartridge 11 (shown in greater detail in Figure 2a ) consists of an outer container 13 in which the blocking means 7 consist of a single-piece pin preferably operating by means of snap-engagement and composed of a first cylindrical portion 7A and a second portion 7B projecting from the first portion and coaxial therewith.
- the actuator operates at room temperature whereas, in the event of an increase in temperature, the actuator is designed to operate in any case without problems up to operating temperatures in the region of 90-95°C.
- the electric motor 4 operates the chain 3 which moves so as to transmit to the window an opening or closing movement.
- the blocking means 7 block the movement of the chain 3 so as to prevent closing of the window and therefore allow the smoke to escape.
- the blocking action is achieved by means of snap-engagement such that the pin 7B blocks the chain 3 by means of interlocking engagement, being inserted between two bushes 6 of a link 3A or two consecutive links 3A of the chain.
- the threshold value at which the blocking action is triggered lies, according to the invention, between 100°C and 120°C, and more particularly between 105°C and 115°C; the operating temperature cannot be higher than 120°C because 130°C is the temperature at which the plastic guide of the chain 3, and more generally the plastic material from which the actuator is made, starts to soften and lose, consequently, the properties which allow it, in the first case, to guide the chain during the window opening and closing movements and, in the second case, to withstand the load exerted by the weight of the window.
- the snap-engaging means 7B are connected to resilient means 15 which are arranged inside the first cylindrical portion 7A and which bias the abovementioned blocking means 7 towards the chain 3; these means 15 are of the form-memory type, namely they are deformable depending on the temperature and are held in position by retaining means 17 which, in the first embodiment of the invention, consist of a spring clamp or clip and are seated inside a groove 19 formed in the portion 7A and arranged perpendicularly with respect to the longitudinal axis of the blocking means 7. In other words, the retaining means 17 temporarily fix the resilient means 15 inside the blocking means 7.
- a form-memory material has the characteristic property that it may be deformed at a certain temperature and return into its original form when an operating temperature (threshold temperature) characteristic of the material used is reached
- the resilient means 15 (consisting, for example, of a compression spring 15) reassume their original form, namely the spring 15 slackens, overcoming the resistance of the retaining means 17, releases the blocking means 7 and pushes the snap-engaging means 7B towards the chain 3 so as to block it.
- the form-memory material is chosen so as not to be activated in normal operating conditions of the actuator nor below temperatures close to 100°C which could be reached in particular transportation or storage conditions.
- the retaining means 17 are of the form-memory type together with the resilient means 15 or the retaining means 17 are of the form-memory type while the resilient means 15 are not.
- the retaining means 17 retain the blocking means 7 in the blocking position inasmuch as the actuator 1 must be disassembled and the chain 3 released so as to allow normal operation of the actuator and the spring 15 must be re-tensioned so as to be able to act again if necessary.
- the cartridge 11 may be suitably removed and replaced by another one in the event of wear of the component materials.
- an actuator 101 is provided with a rack 103 instead of the chain 3 according to the first embodiment.
- an electric motor transmits a movement to a series of gears, the last one 105 of which makes contact with a rack 103.
- the resilient means 115 and the retaining means 117 may be either simultaneously or exclusively of the form-memory type.
- the operating conditions are the same as those which govern operation of the chain actuator of the first embodiment of the invention.
- the blocking means 107 which are kept biased by resilient form-memory means 115 in the direction of the rack 103 and are held in position by retaining parts 117, block the rack 103 by means of interlocking engagement.
- the blocking action occurs as a result of snap-engagement by means of a pin, denoted by 107B (shown in detail in Figure 4 ), but in this case having a groove 8 which engages, in the blocked condition, with a tooth 18 of the rack 103.
- the threshold values for triggering of the blocking action coincide with those of the first embodiment.
- the rack-type actuator is not provided with a cartridge housing the blocking means.
- Some of the components according to the invention namely the chain or rack guide, the gears for transferring the movement from the motor to the chain, etc., are preferably made of plastic or similar materials, therefore resulting in a relatively low overall weight so as to ensure simple assembly, low costs and noiseless operation.
- the load-bearing structure of the machine namely the housing containing the structural members, the brackets for supporting and mounting on the frame and on the window are made of metallic material which is resistant to the temperatures stipulated in the safety regulations for smoke and heat evacuation systems.
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Description
- The invention relates to an actuator, in particular to an actuator having, associated with it, a member movable with a translational movement and generally consisting of a chain or a rack, for connection to a frame or the like.
- More particularly, the invention relates to an actuator intended for fire-prevention systems.
- As is well known, in the case of a "chain actuator", the chain is housed inside a casing which is generally supported by two side arms of a fixing bracket mounted on the frame.
- The chain actuator comprises an electric motor which, by means of gears, engages with and moves a chain.
- The chain has one end which always remains inside the casing, while the other end is fastened to the movable part of the frame which it reaches via an opening in the said casing.
- Owing to the particular form of the casing and the provision of suitable guides, the chain may be wound completely inside the casing occupying a minimum amount of space.
- Depending on the direction of rotation of the motor, the chain causes opening or closing of the window.
- Rack actuators are based on a similar operating principle, except that operation of the motor in both senses, and therefore of the gearing associated with it, causes the displacement in both directions of a linear rack which has one end fixed to a component to be actuated.
- The actuators referred to operate without problems at room temperature, including also particularly hot and humid environments.
- Should the room temperature rise beyond a given threshold, for example in the case of a fire, the closing mechanism of a window must be blocked so as to allow the smoke to escape.
- Moreover, in accordance with the latest regulations, in the event of imminent danger (fire or the like) the windows or more generally the evacuation devices must be blocked in positions determined by a smoke and heat evacuation control unit which causes opening and closing of the windows depending on the direction of the wind.
- For example, if the wind blows from east to west, the control unit will cause closing of the east-facing windows and opening of the west-facing windows.
- The German patent No.
19534614 discloses chain actuators for windows where, in particular temperature conditions, the gearing which moves the chain is blocked by suitable bimetallic blocking means so as to keep the window in the open state and allow the smoke to escape. - This solution has the main drawback that it allows, if necessary, operation of the window or the like to be blocked in one direction only, in particular in the direction corresponding to closing of the window.
- In the case where there is more than one window to be operated, typically two windows, with this solution it is only possible to block both the windows during closing.
- Moreover, the unidirectional control system does not exclude the possibility of the mechanism being able to be operated in the opposite direction to the blocking direction, something which, among other things, clearly does not comply with the activity stipulated in the abovementioned regulations.
- Finally, it is not possible to cause an immediate reaction of the blocking device when certain unfavourable environmental conditions exist.
- The object of the present invention is to provide an improved actuator so as to overcome the drawbacks of the prior art.
- The abovementioned object is achieved by an actuator housed inside a casing having, associated with it, a member movable with a translational movement for connection to a fixture or the like, in accordance with that described in
Claim 1. - The actuator according to the invention achieves the following advantages with respect to the prior art:
- opening or closing of the windows or evacuation devices depending on the particular emergency conditions and the particular direction of the wind;
- immediate reaction in the event of stoppage;
- the possibility of defining with extreme precision the temperature for activation of the blocking device.
- The characteristic features and further advantages of the invention will emerge from the description, provided hereinbelow, of an example of embodiment thereof provided by way of a non-limiting example with reference to the accompanying drawings in which:
-
Figure 1 shows schematically a top plan view of a portion of an actuator according to a first embodiment of the invention; -
Figure 2 shows a perspective view of a detail of the actuator according to the preceding figures; -
Figures 2A, 2B and 2C show different views of the detail according toFigure 2 ; -
Figure 3 shows schematically a top plan view of a portion of an actuator according to a second embodiment of the invention; -
Figure 4 shows a perspective view of a detail of the actuator according toFigure 3 . - With reference to the figures,
Figure 1 shows a portion of the actuator according to a first embodiment of the invention, in particular a chain actuator. - The
actuator 1 is housed inside a casing having, associated with it, a member movable with a translational movement, in particular achain 3 for connection to a fixture or the like. Thechain 3 is, for example, composed of a certain number oflinks 3A which are coupled to each other by means ofbushes 6. - The housing is composed of a box-
like body 10, provided with aside opening 9 for allowing thechain 3 to pass outside, and a corresponding cover; inFigure 1 the cover has been removed so as to allow better viewing of the components inside theactuator 1. - An
electric motor 4 transmits a rotary movement to thechain 3, by means of a set of gears, the number of which may vary depending on the design envisaged and only thegearwheel 5 of which, which is the gear of the set furthest from theelectric motor 4, is shown inFigure 1 ; thegearwheel 5 engages with and moves with its teeth thechain 3 which is displaceable inside the casing guided by a metal stud (not shown in the figures) inserted in the first link of the chain which facilitates the travel thereof along at least one slot formed in the bottom of thebox 10 or in the opposite chain containing member. - A
cartridge 11 is provided according to the invention inside the box-shaped body 10, opposite the side outlet opening 9, saidcartridge 11 comprisingsuitable blocking means 7 arranged perpendicularly with respect to thechain 3 and designed to block the movement thereof. - More precisely, the cartridge 11 (shown in greater detail in
Figure 2a ) consists of anouter container 13 in which the blocking means 7 consist of a single-piece pin preferably operating by means of snap-engagement and composed of a firstcylindrical portion 7A and asecond portion 7B projecting from the first portion and coaxial therewith. In normal operating conditions, the actuator operates at room temperature whereas, in the event of an increase in temperature, the actuator is designed to operate in any case without problems up to operating temperatures in the region of 90-95°C. - In the two conditions considered, the
electric motor 4 operates thechain 3 which moves so as to transmit to the window an opening or closing movement. - When the temperature increases and exceeds a predefined threshold value owing, for example, to a fire or the heat produced by combustion fumes, the blocking means 7 block the movement of the
chain 3 so as to prevent closing of the window and therefore allow the smoke to escape. - The blocking action is achieved by means of snap-engagement such that the
pin 7B blocks thechain 3 by means of interlocking engagement, being inserted between twobushes 6 of alink 3A or twoconsecutive links 3A of the chain. - The threshold value at which the blocking action is triggered lies, according to the invention, between 100°C and 120°C, and more particularly between 105°C and 115°C; the operating temperature cannot be higher than 120°C because 130°C is the temperature at which the plastic guide of the
chain 3, and more generally the plastic material from which the actuator is made, starts to soften and lose, consequently, the properties which allow it, in the first case, to guide the chain during the window opening and closing movements and, in the second case, to withstand the load exerted by the weight of the window. - The snap-engaging
means 7B are connected toresilient means 15 which are arranged inside the firstcylindrical portion 7A and which bias the abovementioned blocking means 7 towards thechain 3; these means 15 are of the form-memory type, namely they are deformable depending on the temperature and are held in position by retainingmeans 17 which, in the first embodiment of the invention, consist of a spring clamp or clip and are seated inside agroove 19 formed in theportion 7A and arranged perpendicularly with respect to the longitudinal axis of the blocking means 7. In other words, the retaining means 17 temporarily fix theresilient means 15 inside theblocking means 7. - A form-memory material has the characteristic property that it may be deformed at a certain temperature and return into its original form when an operating temperature (threshold temperature) characteristic of the material used is reached
- At the threshold temperature the resilient means 15 (consisting, for example, of a compression spring 15) reassume their original form, namely the
spring 15 slackens, overcoming the resistance of theretaining means 17, releases theblocking means 7 and pushes the snap-engagingmeans 7B towards thechain 3 so as to block it. - The form-memory material is chosen so as not to be activated in normal operating conditions of the actuator nor below temperatures close to 100°C which could be reached in particular transportation or storage conditions.
- According to a variation of embodiment described the retaining means 17 are of the form-memory type together with the
resilient means 15 or theretaining means 17 are of the form-memory type while theresilient means 15 are not. - Once the
chain 3 has been blocked in position and the emergency condition terminated, the retaining means 17 retain the blocking means 7 in the blocking position inasmuch as theactuator 1 must be disassembled and thechain 3 released so as to allow normal operation of the actuator and thespring 15 must be re-tensioned so as to be able to act again if necessary. - The
cartridge 11 may be suitably removed and replaced by another one in the event of wear of the component materials. - In a second embodiment of the invention, as shown in
Figures 3 and4 , anactuator 101 is provided with arack 103 instead of thechain 3 according to the first embodiment. - In general the parts of the second embodiment which are similar to those already present in the first embodiment will be indicated by numbers increased by 100.
- In this embodiment also, an electric motor transmits a movement to a series of gears, the last one 105 of which makes contact with a
rack 103. - As for the first embodiment, the resilient means 115 and the retaining means 117 may be either simultaneously or exclusively of the form-memory type.
- The operating conditions are the same as those which govern operation of the chain actuator of the first embodiment of the invention.
- When the temperature increases or exceeds a predefined threshold value owing, for example, to a fire or the heat produced by combustion fumes, the blocking means 107, which are kept biased by resilient form-memory means 115 in the direction of the
rack 103 and are held in position by retainingparts 117, block therack 103 by means of interlocking engagement. - As for the first embodiment, the blocking action occurs as a result of snap-engagement by means of a pin, denoted by 107B (shown in detail in
Figure 4 ), but in this case having agroove 8 which engages, in the blocked condition, with atooth 18 of therack 103. - The threshold values for triggering of the blocking action coincide with those of the first embodiment.
- Differently from that envisaged for the actuator of the first embodiment, the rack-type actuator is not provided with a cartridge housing the blocking means.
- These means may in any case be replaced where necessary.
- Some of the components according to the invention, namely the chain or rack guide, the gears for transferring the movement from the motor to the chain, etc., are preferably made of plastic or similar materials, therefore resulting in a relatively low overall weight so as to ensure simple assembly, low costs and noiseless operation.
- The load-bearing structure of the machine, namely the housing containing the structural members, the brackets for supporting and mounting on the frame and on the window are made of metallic material which is resistant to the temperatures stipulated in the safety regulations for smoke and heat evacuation systems.
Claims (15)
- Actuator (1, 101) housed inside a casing and having, associated with it, a member (3, 103) movable with a translational movement for connection to a frame or to the like, characterized in that it comprises:- means (7, 107) for selectively blocking said movable member (3, 103), able to operate beyond a predetermined threshold temperature.
- Actuator according to Claim 1, in which said blocking means (7, 107) comprise snap-engaging means (7B, 107B) able to block by means of interlocking engagement said movable member (3, 103), interfering with its translational movement.
- Actuator according to Claim 2, in which said snap-engaging means (7B, 107B) comprise a pin biased by resilient means (15, 115) in the direction of said movable member (3, 103) and held in position by retaining means (17, 117).
- Actuator according to Claim 3, in which said resilient means (15, 115) and/or said retaining means (17, 117) are of the form-memory type.
- Actuator according to one of the preceding claims, in which said member (3) movable with a translational movement comprises a chain (3).
- Actuator according to Claim 5, in which said pin (7B) blocks the chain (3) by means of interlocking engagement, being inserted between two bushes (6) of a link (3A) or two consecutive links (3A) of said chain (3).
- Actuator according to one of the preceding claims, in which said blocking means (7) are housed inside a removable cartridge (11).
- Actuator according to one of the preceding claims, in which said blocking means (7) are arranged perpendicularly with respect to said chain (3).
- Actuator according to one of the preceding claims, in which said blocking means (7) also comprise a cylindrical portion (7A) which houses the resilient means (15).
- Actuator according to Claim 9, in which said retaining means are housed inside a groove (19) formed in said portion (7A).
- Actuator according to Claim 10, in which said groove is oriented perpendicularly with respect to the longitudinal axis of the blocking means (7).
- Actuator according to one of Claims 1 to 5, in which said member (103) movable with a translational movement comprises a rack (103).
- Actuator according to Claim 10, in which said pin (107B) has a groove (8) which engages, in the blocked condition, with a tooth (18) of said rack (103).
- Actuator according to one of the preceding claims, in which said resilient means (15, 115) comprises a compression spring.
- Actuator according to one of the preceding claims, in which said retaining means (17, 117) comprise spring clamps or clips.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08425461.4A EP2141316B1 (en) | 2008-06-30 | 2008-06-30 | Improvement to actuators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08425461.4A EP2141316B1 (en) | 2008-06-30 | 2008-06-30 | Improvement to actuators |
Publications (2)
Publication Number | Publication Date |
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EP2141316A1 true EP2141316A1 (en) | 2010-01-06 |
EP2141316B1 EP2141316B1 (en) | 2013-04-10 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP08425461.4A Not-in-force EP2141316B1 (en) | 2008-06-30 | 2008-06-30 | Improvement to actuators |
Country Status (1)
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EP (1) | EP2141316B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770385A1 (en) | 2013-02-22 | 2014-08-27 | Nekos Srl | Method for enabling a synchronous movement of actuators of a closing system |
CN104818921A (en) * | 2015-05-06 | 2015-08-05 | 西京学院 | Intelligent window based on STC12C5A60S2 |
EP4008870A1 (en) * | 2020-12-03 | 2022-06-08 | TOPP S.r.l. a socio unico | Safety device for an actuator for a window frame and actuator for a window frame comprising it |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534614A1 (en) | 1995-09-18 | 1997-03-20 | Winkhaus Fa August | Blocking action safety device for door or window |
EP1205622A1 (en) * | 2000-11-08 | 2002-05-15 | GSG INTERNATIONAL S.p.A. | An apparatus for the automated actuation of windows and doors |
EP1686227A2 (en) * | 2005-01-31 | 2006-08-02 | Anna Gaggero | Chain actuator for moving windows, tilting frames or the like |
-
2008
- 2008-06-30 EP EP08425461.4A patent/EP2141316B1/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534614A1 (en) | 1995-09-18 | 1997-03-20 | Winkhaus Fa August | Blocking action safety device for door or window |
EP1205622A1 (en) * | 2000-11-08 | 2002-05-15 | GSG INTERNATIONAL S.p.A. | An apparatus for the automated actuation of windows and doors |
EP1686227A2 (en) * | 2005-01-31 | 2006-08-02 | Anna Gaggero | Chain actuator for moving windows, tilting frames or the like |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770385A1 (en) | 2013-02-22 | 2014-08-27 | Nekos Srl | Method for enabling a synchronous movement of actuators of a closing system |
CN104818921A (en) * | 2015-05-06 | 2015-08-05 | 西京学院 | Intelligent window based on STC12C5A60S2 |
EP4008870A1 (en) * | 2020-12-03 | 2022-06-08 | TOPP S.r.l. a socio unico | Safety device for an actuator for a window frame and actuator for a window frame comprising it |
Also Published As
Publication number | Publication date |
---|---|
EP2141316B1 (en) | 2013-04-10 |
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