EP2899359B1 - A device for pre-loading a spring of a rolling curtain - Google Patents
A device for pre-loading a spring of a rolling curtain Download PDFInfo
- Publication number
- EP2899359B1 EP2899359B1 EP15152459.2A EP15152459A EP2899359B1 EP 2899359 B1 EP2899359 B1 EP 2899359B1 EP 15152459 A EP15152459 A EP 15152459A EP 2899359 B1 EP2899359 B1 EP 2899359B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- loading
- external support
- snap
- screen
- 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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Links
- 238000005096 rolling process Methods 0.000 title claims description 15
- 241000255925 Diptera Species 0.000 claims description 29
- 238000009434 installation Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 230000036316 preload Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
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
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/40—Roller blinds
- E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
- E06B9/50—Bearings specially adapted therefor
-
- 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
- E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes
-
- 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
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/60—Spring drums operated only by closure members
-
- 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
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/62—Counterweighting arrangements
Definitions
- the present invention relates to the sector of door and window frames, and in particular to curtains of the rolling type.
- the present invention regards an innovative pre-loading device that is particularly convenient and safe to install, in so far as it does not require particular equipment or arrangements for mounting and installation.
- a spring-winding device that envisages a bushing provided with front-engagement teeth (i.e., ones engaging in an axial direction), wherein the element that rigidly connects the winding spring to the lateral support is divided into two parts that can slide axially with respect to one another, one of which has a series of teeth once again of the front-engagement type.
- the teeth do or do not engage: if the teeth engage, the winding spring has its ends blocked, whereas, if the teeth do not engage, the spring exerts its own force on the tube via the end engaged in the latter.
- the teeth do not engage when the spring is located in its seat since installation determines sliding of the two parts with front teeth in the sense of releasing the teeth from engagement.
- the teeth of said two axially slidable parts are rigid and are unable to undergo any elastic deformation.
- a disadvantage of the above known device is represented by the fact that, in the device described in WO 2009/128108 , there is always necessary a force that keeps the teeth of the two axially sliding components constantly in front engagement in order to enable rotation only in the loading direction.
- a device for preloading of a rewind mechanism for a fabric arranged on an elongated tube or the like of a roller blind, a projector screen or the like is known, from WO 2012/064270 , a device for preloading of a rewind mechanism for a fabric arranged on an elongated tube or the like of a roller blind, a projector screen or the like.
- the rewind mechanism is arranged to be essentially inserted into said tube and includes a spring, that is tensioned when the fabric is rolled out and relieved when the fabric is rolled up onto the tube.
- the device includes an outer mounting element, that is arranged to be attached to the tube, and an inner mounting element, that is arranged to be attached to an outer bracket, said mounting elements being rotatingly arranged in relation to each other about a longitudinal axis of said tube.
- a spring element is arranged between said mounting elements and includes a sleeve, in which said spring is arranged.
- the sleeve has an inner diameter that is smaller than the outer diameter of the spring in an untensioned condition, wherein said spring is arranged inside the sleeve by being inserted therein in a pretensioned condition.
- a roller shade which may include: a roller; an axle located in the roller; an adjustable counterbalancing mechanism configured to counter balance a rotation of the roller wherein the counterbalancing mechanism is configured to impart a rotational force on the roller and the rotational force is adjusted by rotating the axle; and a locking mechanism attached to the roller and configured to lock the axle at a given angular orientation, wherein the locking mechanism includes a shear pin.
- DE 10 2011 050666 a winding assembly which has an outside retainer provided for a cord or a curtain, where a hollow shaft is coupled to a drive wheel at one end. A pulling force is applied by the cord on the drive wheel to rotate a hollow shaft in a winding direction. A spring motor arranged in the hollow shaft is tensioned during winding of the cord. An unwinding operation is supported by applying a rotational force on the hollow shaft.
- the device D illustrated in Figure 1 is designed for carrying out pre-loading of the spring that enables winding and unwinding of the screen on the tube in rolling mosquito screens.
- loading of the spring occurs without any possibility of it unwinding dangerously during installation on account of a wrong manoeuvre on the part of the installer.
- a peculiar characteristic of the invention lies in the fact that, unlike what occurs for traditional devices, loading of the spring can be carried out prior to installation, i.e., during assembly of the components in the box of the rolling curtain, and not, as usually occurs, directly at the moment of installation when the box is mounted on the door or window frame.
- the device D comprises a plurality of elements coaxial to one another and sharing the axis of the rolling mosquito screen, namely: an external support 1; an engagement pin 2; a retaining spring 3; an internal bushing 4; a snap-action spring 5; and a spring pin 6. All these elements are described hereinafter.
- the external support 1 inserted therein is the tube TR on which the mosquito screen is rolled. Assembled coaxially to the support 1 are the components that constitute the device D, and the support itself is moreover provided with a toothed inner area with a substantially saw-tooth profile that is of primary importance for operation thereof.
- a projection 10 is provided that projects in a radial direction and has a body with longitudinal development, like a spline, having the purpose of constraining in rotation the tube TR of the mosquito screen on the support 1. Accordingly, this tube TR envisages one or more internal longitudinal grooves designed to co-operate with said projection 10.
- the proximal end of the support 1 has a perimetral shoulder 14 designed to provide a valid resting contrast for the screen tube TR on which the mosquito screen is rolled.
- the engagement pin 2 has the dual function of connection between the device and the lateral end piece for fixing the mosquito screen to the door or window frame and between the device D and the pre-loading spring through the spring pin 6. It has a distal-end area having a square cross section, located on which is the snap-action spring 5. Provided in the outer part of the proximal end is an area that has, preferably, both a slot with a hexagonal cross section and a protrusion having a square (or hexagonal) shape that enables loading of the spring using appropriate wrenches of an Allen-wrench type or of a fixed-wrench type. Adjacent to the proximal end a shoulder 12 is provided on which the retaining spring 3 comes to bear. In order to prevent any sticking during the relative axial movement between the pin 2 and the support 1, provided on the outside of the retaining spring 3 and adjacent to the shoulder 12 is a tubular sleeve 13 designed to slide freely within the support 1.
- the retaining spring 3 with axial thrust, keeps the components of the ensemble in the correct working position.
- the retaining spring 3 Prior to installation, the retaining spring 3 is not compressed or is only slightly compressed and enables engagement for loading in so far as the spring pin 6 bears upon the distal end of the tube support 1 and keeps the snap-action spring 5 in a position such that it can mesh with the internal toothing of the tube support 1.
- the retaining spring 3 tends (as will be seen more clearly from what follows) to bring the parts back into the position of engagement of the snap-action spring 5 with the toothed part of the tube support 1.
- the snap-action spring 5 constitutes the true novelty of the device. It is substantially constituted by a bushing with one or more saw-tooth external teeth, designed to undergo elastic deformation in a radial direction. It is made of plastic material containing elastomer that enables it to bend elastically its own teeth in a radial direction to engage by snap action the teeth present inside the tube support 1 and simultaneously to be able to turn and thus load the pre-loading spring MP of the mosquito screen.
- the pre-loading device D is designed to be mounted in the tube TR with round section, on which the mesh of the mosquito screen is rolled and, more precisely, at the end of said round tube and simultaneously at the end of the pre-loading spring MP that brings about rolling and unrolling of the mosquito screen itself (see Figure 9 ) and that is protected by the spring tube TM.
- the device is thus assembled with the aid of a single fixing screw 7.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Description
- The present invention relates to the sector of door and window frames, and in particular to curtains of the rolling type.
- It is known that rolling curtains are equipped with an actuating spring that must be pre-loaded at the moment of installation.
- The present invention regards an innovative pre-loading device that is particularly convenient and safe to install, in so far as it does not require particular equipment or arrangements for mounting and installation.
- Known from
WO 2009/128108 is a spring-winding device that envisages a bushing provided with front-engagement teeth (i.e., ones engaging in an axial direction), wherein the element that rigidly connects the winding spring to the lateral support is divided into two parts that can slide axially with respect to one another, one of which has a series of teeth once again of the front-engagement type. According to the position of axial sliding, the teeth do or do not engage: if the teeth engage, the winding spring has its ends blocked, whereas, if the teeth do not engage, the spring exerts its own force on the tube via the end engaged in the latter. The teeth do not engage when the spring is located in its seat since installation determines sliding of the two parts with front teeth in the sense of releasing the teeth from engagement. The teeth of said two axially slidable parts are rigid and are unable to undergo any elastic deformation. - A disadvantage of the above known device is represented by the fact that, in the device described in
WO 2009/128108 , there is always necessary a force that keeps the teeth of the two axially sliding components constantly in front engagement in order to enable rotation only in the loading direction. - It is known, from
WO 2012/064270 , a device for preloading of a rewind mechanism for a fabric arranged on an elongated tube or the like of a roller blind, a projector screen or the like. The rewind mechanism is arranged to be essentially inserted into said tube and includes a spring, that is tensioned when the fabric is rolled out and relieved when the fabric is rolled up onto the tube. The device includes an outer mounting element, that is arranged to be attached to the tube, and an inner mounting element, that is arranged to be attached to an outer bracket, said mounting elements being rotatingly arranged in relation to each other about a longitudinal axis of said tube. A spring element is arranged between said mounting elements and includes a sleeve, in which said spring is arranged. The sleeve has an inner diameter that is smaller than the outer diameter of the spring in an untensioned condition, wherein said spring is arranged inside the sleeve by being inserted therein in a pretensioned condition. -
US 2014/014281 discloses a roller shade which may include: a roller; an axle located in the roller; an adjustable counterbalancing mechanism configured to counter balance a rotation of the roller wherein the counterbalancing mechanism is configured to impart a rotational force on the roller and the rotational force is adjusted by rotating the axle; and a locking mechanism attached to the roller and configured to lock the axle at a given angular orientation, wherein the locking mechanism includes a shear pin. - Furthermore,
DE 10 2011 050666 a winding assembly which has an outside retainer provided for a cord or a curtain, where a hollow shaft is coupled to a drive wheel at one end. A pulling force is applied by the cord on the drive wheel to rotate a hollow shaft in a winding direction. A spring motor arranged in the hollow shaft is tensioned during winding of the cord. An unwinding operation is supported by applying a rotational force on the hollow shaft. - One of the purposes of the present invention is to overcome the above drawbacks by providing a device equipped with an element that is not present in
WO 2009/128108 and is provided with engagement teeth that are elastically deformable in a radial, and not axial, direction, thus rendering unnecessary the constant presence of an axial force that constantly keeps in front engagement the front teeth of the two axially slidable components that, together, connect the winding spring to the lateral support. - A better understanding of the invention will be obtained from the ensuing detailed description with reference to the figures listed below, which illustrate a preferred embodiment of the invention.
- In the drawings:
-
Figure 1A is a 3D view of the device according to the invention assembled and sectioned according to the longitudinal axis; -
Figure 1B is a cross-sectional view corresponding to that ofFigure 1A ; -
Figures 2 and3 show the device as a whole from two opposite viewpoints; -
Figure 4 shows the details of the engagement teeth of the snap-action spring that engage with the ones inside the tube support; -
Figures 5 and6 show the device in two exploded views from two opposite viewpoints; -
Figure 7 shows the device as a whole in a position of loading of the pre-loading spring, with the teeth of the snap-action spring engaged with those of the tube support; -
Figure 8 shows the device as a whole in the working position, with the teeth of the snap-action spring released from those of the tube support; -
Figure 9 is a 3D view that shows a detail of installation of the device; -
Figure 10 is an exploded view corresponding to that ofFigure 9 ; -
Figure 11 is a 3D view that shows a detail of the installation of the device in the box of the rolling curtain; and -
Figure 12 is an exploded view corresponding to that ofFigure 11 . - In what follows reference will be made to the case of rolling mosquito screens, but the teachings may be applied - without modifications - to any type of rolling curtain.
- The device D illustrated in
Figure 1 is designed for carrying out pre-loading of the spring that enables winding and unwinding of the screen on the tube in rolling mosquito screens. - In particular, loading of the spring occurs without any possibility of it unwinding dangerously during installation on account of a wrong manoeuvre on the part of the installer.
- A peculiar characteristic of the invention lies in the fact that, unlike what occurs for traditional devices, loading of the spring can be carried out prior to installation, i.e., during assembly of the components in the box of the rolling curtain, and not, as usually occurs, directly at the moment of installation when the box is mounted on the door or window frame.
- Furthermore, in the event of deterioration or failure of the mesh of the mosquito screen, dismantling and replacement thereof can be carried out in a faster way.
- With reference to the figures listed above, the device D comprises a plurality of elements coaxial to one another and sharing the axis of the rolling mosquito screen, namely: an
external support 1; anengagement pin 2; aretaining spring 3; aninternal bushing 4; a snap-action spring 5; and aspring pin 6. All these elements are described hereinafter. - As regards the
external support 1, inserted therein is the tube TR on which the mosquito screen is rolled. Assembled coaxially to thesupport 1 are the components that constitute the device D, and the support itself is moreover provided with a toothed inner area with a substantially saw-tooth profile that is of primary importance for operation thereof. - On the outer surface of said
support 1, aprojection 10 is provided that projects in a radial direction and has a body with longitudinal development, like a spline, having the purpose of constraining in rotation the tube TR of the mosquito screen on thesupport 1. Accordingly, this tube TR envisages one or more internal longitudinal grooves designed to co-operate with saidprojection 10. - Furthermore, the proximal end of the
support 1 has aperimetral shoulder 14 designed to provide a valid resting contrast for the screen tube TR on which the mosquito screen is rolled. - The
engagement pin 2 has the dual function of connection between the device and the lateral end piece for fixing the mosquito screen to the door or window frame and between the device D and the pre-loading spring through thespring pin 6. It has a distal-end area having a square cross section, located on which is the snap-action spring 5. Provided in the outer part of the proximal end is an area that has, preferably, both a slot with a hexagonal cross section and a protrusion having a square (or hexagonal) shape that enables loading of the spring using appropriate wrenches of an Allen-wrench type or of a fixed-wrench type. Adjacent to the proximal end ashoulder 12 is provided on which the retainingspring 3 comes to bear. In order to prevent any sticking during the relative axial movement between thepin 2 and thesupport 1, provided on the outside of the retainingspring 3 and adjacent to theshoulder 12 is atubular sleeve 13 designed to slide freely within thesupport 1. - The retaining
spring 3, with axial thrust, keeps the components of the ensemble in the correct working position. Prior to installation, theretaining spring 3 is not compressed or is only slightly compressed and enables engagement for loading in so far as thespring pin 6 bears upon the distal end of thetube support 1 and keeps the snap-action spring 5 in a position such that it can mesh with the internal toothing of thetube support 1. After installation, theretaining spring 3 tends (as will be seen more clearly from what follows) to bring the parts back into the position of engagement of the snap-action spring 5 with the toothed part of thetube support 1. - The
internal bushing 4, preferably made of brass, during operation, has the function of a thrust bearing between the retainingspring 3 and the snap-action spring 5, as well as that of longitudinal-guide bearing between the cylindrical body of the engagement pin and thetube support 1. It is only the latter, in fact, that turns during winding-unwinding of the pre-loading spring (i.e., closing-opening of the mosquito screen). - The snap-
action spring 5, thanks to the particular nature of its geometry and of the material of which it is made, constitutes the true novelty of the device. It is substantially constituted by a bushing with one or more saw-tooth external teeth, designed to undergo elastic deformation in a radial direction. It is made of plastic material containing elastomer that enables it to bend elastically its own teeth in a radial direction to engage by snap action the teeth present inside thetube support 1 and simultaneously to be able to turn and thus load the pre-loading spring MP of the mosquito screen. - On the
spring pin 6 the end part of the pre-loading spring MP is fixed. Assembly of saidspring pin 6 with theengagement pin 2 is obtained via a self-tappingscrew 7. - The pre-loading device D according to the present invention is designed to be mounted in the tube TR with round section, on which the mesh of the mosquito screen is rolled and, more precisely, at the end of said round tube and simultaneously at the end of the pre-loading spring MP that brings about rolling and unrolling of the mosquito screen itself (see
Figure 9 ) and that is protected by the spring tube TM. - By holding stationary the tube TR on which the screen is placed, it is sufficient to turn the engagement pin 2 (for example, with a hexagonal Allen wrench or with a spanner) so as to get also the snap-
action spring 5 and thespring pin 6, which are fixed in rotation with respect thereto, to turn. - The aforesaid snap-
action spring 5 can turn, with respect to thetube support 1, only in the loading direction (clockwise according to the arrow ofFigure 2 ) thanks to the elastic teeth DM having a saw-tooth profile with which it is equipped, but cannot turn in the opposite direction given the geometry of said teeth. - The above teeth DM of the snap-
action spring 5, which according to the invention are flexible and undergo deformation in a radial direction, during rotation engage the rigid teeth DS present within thetube support 1 so as to enable loading of the pre-loading spring MP. The greater the number of turns made, the more the spring MP will be loaded (seeFigures 4 ,7 ). - Once the desired loading has been achieved for the spring MP by actuating the pre-loading device D installed on the tube TR of the mosquito screen, it is sufficient to insert the square head of the
engagement pin 2 in the seat purposely provided on thelateral end piece 11 for fixing of the mosquito screen to the door or window frame (seeFigures 9-10 ). - According to a peculiar characteristic of the present invention, when this operation of positioning in situ of the end of the device D in the lateral fixing
end piece 11 is performed, theengagement pin 2 is displaced axially with respect to thetube support 1 towards the centre of the mosquito screen, and this displacement advantageously exerts a thrust on the snap-action spring 5, which translates together with thespring pin 6 until it disengages from the toothed area inside the tube support 1 (seeFigure 8 ). In this way, the mechanism according to the present invention is in the working position; namely, it is free to turn in both directions of rotation (either clockwise or counterclockwise), which is equivalent to saying that the mosquito screen can be opened and closed normally. - It is should be noted that the above axial displacement of the
engagement pin 2 with respect to thesupport 1 of the tube TR of the mosquito screen causes exertion of a thrust on the retainingspring 3, which, undergoing axial compression, applies a force of contrast on thebushing 4 that, with its external circumference, bears upon the internal toothing of thetube support 1. This compression of the retainingspring 3 enables the device D to be brought back into the pre-loading configuration as soon as it is removed from the lateral fixingend piece 11. - From the operating standpoint, there should be noted the simplicity of installation. In fact, assembly of the device simply requires the following operations:
- A - inserting the retaining
spring 3 and thebushing 4 made of brass on the part with round section of theengagement pin 2; - B - resting the
tube support 1 and the snap-action spring 5, inserting it in the part with square section of theengagement pin 2; - C - inserting the
spring pin 6 until it is brought to bear upon theengagement pin 2 and upon thetube support 1; and - D - inserting the fixing
screw 7, preferably a self-tapping screw, and screwing it until all the components are brought to bear properly on one another. - The device is thus assembled with the aid of a
single fixing screw 7.
Claims (14)
- A device (D) for pre-loading a pre-loading spring (MP) of a rolling curtain that can be installed between said curtain and a lateral end piece (11) for fixing the curtain to a load-bearing structure, said device can be installed coaxially at at least one end of a screen tube (TR) on which a rolling curtain or mosquito screen is rolled and in that it comprises, in combination:- an external support (1), tubular, on which the screen tube (TR) can be fitted, having a toothed inner area with a substantially saw-tooth profile;- a spring pin (6) fitted at the end of the pre-loading spring (MP);- an engagement pin (2) that has the dual function of connection between the device (D) and the lateral end piece (11) for fixing the mosquito screen, as well as between the device (D) and the pre-loading spring (MP) through said spring pin (6); wherein said engagement pin has a distal-end area having a square or polygonal cross section, located on which is the snap-action spring (5);- an internal bushing (4) that during operation has the function of bearing between the retaining spring (3) and the snap-action spring (5), as well as the function of longitudinal-guide bearing between the cylindrical body of the engagement pin (2) and the external support (1), which is the only element that turns during winding-unwinding of the pre-loading spring, i.e., during closing-opening of the mosquito screen; characterized in that the device comprises- a snap-action spring (5) that is substantially constituted by a bushing with one or more saw-tooth external teeth, designed to undergo elastic deformation in a radial direction and co-operate with said internal toothed area of the external support (1), where the teeth of said snap-action spring (5) are elastically deformable and project in a radial, and not axial, direction with respect to the axis of the rolling curtain; wherein said elements are positioned coaxially to one another and so as to share the axis of the rolling curtain.
- The device (D) according to claim 1, characterized in that it further comprises a retaining spring (3), with axial thrust, which holds the components of the ensemble in the correct working position: prior to installation, said retaining spring (3) is not compressed or is slightly compressed and enables engagement for loading in so far as the spring pin (6) bears upon the distal end of the external support (1) and keeps the snap-action spring (5) in a position such that it can mesh with the internal toothing of the external support (1); after installation, the retaining spring (3) tends to bring the parts of the device back into the configuration of engagement of said snap-action spring (5) with the toothed part of the external support (1) itself.
- The device (D) according to either claim 1 or claim 2, characterized in that provided on the outer surface of said external support (1) is a projection (10) that projects in a radial direction and has a body with longitudinal development, like a spline, having the purpose of constraining in rotation the screen tube (TR) of the mosquito screen on the external support (1) itself; said screen tube (TR) accordingly envisaging one or more internal longitudinal grooves designed to co-operate with said projection (10).
- The device (D) according to claim 3, characterized in that the proximal end of the external support (1) has a perimetral shoulder (14) designed to provide a valid resting contrast element for the screen tube (TR) on which the mosquito screen is rolled.
- The device (D) according to one or more of the preceding claims, characterized in that provided in the outer part of the proximal end of the engagement pin (2) is an area that has a slot with a hexagonal cross section and/or a protrusion having a square or hexagonal shape that enable/s loading of the spring via appropriate wrenches of an Alien-wrench type or of the fixed-wrench type.
- The device (D) according to claim 2, characterized in that provided adjacent to the proximal end of the engagement pin (2) is a shoulder (12) on which the retaining spring (3) comes to bear.
- The device (D) according to claim 6, characterized in that to prevent any sticking during the relative axial movement between the engagement pin (2) and the external support (1), outside the retaining spring (3) and adjacent to said shoulder (12) a tubular sleeve (13) is provided designed to slide freely within the external support (1) itself.
- The device (D) according to one or more of the preceding claims, characterized in that said snap-action spring (5) is made of plastic material containing elastomer that enables it to bend elastically its own teeth in a radial direction so that they can engage by snap action the teeth present within the external support (1) and simultaneously to turn and thus load the pre-loading spring (MP) of the rolling curtain or of the mosquito screen.
- The device (D) according to one or more of the preceding claims, characterized in that assembly of said spring pin (6) with the engagement pin (2) is obtained via a coaxial self-tapping screw (7).
- The device (D) according to one or more of the preceding claims, characterized in that it is mounted in the screen tube (TR) with round cross section on which the mosquito screen is rolled and, simultaneously, at the end of the pre-loading spring (MP) that causes the mosquito screen itself to be rolled and unrolled and that is protected by a spring tube (TM).
- The device (D) according to one or more of the preceding claims, characterized in that to pre-load the pre-loading spring (MP), keeping the screen tube (TR) on which the screen is rolled stationary, the engagement pin (2) is turned so as to get also the snap-action spring (5) and the spring pin (6) fixed in rotation with respect thereto to turn.
- The device (D) according to one or more of the preceding claims, characterized in that the teeth of the snap-action spring (5) are flexible and undergo deformation in a radial direction, and during rotation engage the rigid teeth present within the external support (1) so as to enable loading of the pre-loading spring (MP).
- The device (D) according to one or more of the preceding claims, characterized in that, once the desired loading has been reached for the spring (MP), the square head of the engagement pin (2) is fitted in the seat purposely provided on the lateral end piece (11) for fixing the mosquito screen to the door or window frame; so that the engagement pin (2) is displaced axially with respect to the external support (1) towards the centre of the mosquito screen and said displacement brings about a thrust on the snap-action spring (5), which translates together with the spring pin (6) until it disengages from the toothed area internal to the external support (1) itself, so that the device itself will be free to turn in both directions of rotation in such a way that the mosquito screen can be opened and closed normally.
- The device (D) according to claims 2 and 13, characterized in that said axial displacement of the engagement pin (2), with respect to the external support (1) of the screen tube (TR) for the mosquito screen, causes a thrust on the retaining spring (3), which, being axially compressed, applies a force of contrast on the bushing (4), which, with its outer circumference, bears upon the internal toothing of the external support (1); thus obtaining that said compression of the retaining spring (3) brought back the device (D) into the pre-loading configuration as soon as it is removed from the lateral fixing end piece (11).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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ITRM20140039 | 2014-01-27 |
Publications (2)
Publication Number | Publication Date |
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EP2899359A1 EP2899359A1 (en) | 2015-07-29 |
EP2899359B1 true EP2899359B1 (en) | 2017-01-04 |
Family
ID=50349768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15152459.2A Active EP2899359B1 (en) | 2014-01-27 | 2015-01-26 | A device for pre-loading a spring of a rolling curtain |
Country Status (2)
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EP (1) | EP2899359B1 (en) |
ES (1) | ES2617310T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9631425B2 (en) * | 2015-09-08 | 2017-04-25 | Crestron Electronics, Inc. | Roller shade with a pretensioned spring and method for pretensioning the spring |
CN112682449B (en) * | 2019-10-18 | 2022-12-20 | 长城汽车股份有限公司 | Elastic element mounting plug and mounting plug assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20080302A1 (en) | 2008-04-17 | 2008-07-17 | Gianus S R L | SAFETY DEVICE FOR SCREENS ON TUBES, IN PARTICULAR FOR TECHNICAL CURTAINS, MOSQUITO NETS, NETWORKS AND ROLLER SHUTTERS, AND RELATIVE INSTALLATION AND UNINSTALLING PROCEDURES FOR SUCH A DEVICE |
SE535383C2 (en) * | 2010-11-10 | 2012-07-17 | Markisol Holding Ab | Device for biasing a reeling mechanism |
DE102011050666B4 (en) * | 2011-05-27 | 2014-06-12 | Achim Lienert | rewinder |
US20140014281A1 (en) * | 2012-07-13 | 2014-01-16 | Homerun Holdings Corporation | Shade with a Shear Pin and Method for Pretensioning a Shade |
-
2015
- 2015-01-26 ES ES15152459.2T patent/ES2617310T3/en active Active
- 2015-01-26 EP EP15152459.2A patent/EP2899359B1/en active Active
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Also Published As
Publication number | Publication date |
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EP2899359A1 (en) | 2015-07-29 |
ES2617310T3 (en) | 2017-06-16 |
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