EP1052365B1 - Dispositif d'entraînement pour un store vénitien - Google Patents

Dispositif d'entraînement pour un store vénitien Download PDF

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Publication number
EP1052365B1
EP1052365B1 EP20000303940 EP00303940A EP1052365B1 EP 1052365 B1 EP1052365 B1 EP 1052365B1 EP 20000303940 EP20000303940 EP 20000303940 EP 00303940 A EP00303940 A EP 00303940A EP 1052365 B1 EP1052365 B1 EP 1052365B1
Authority
EP
European Patent Office
Prior art keywords
operating mechanism
ring
slats
drive shaft
stop
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.)
Expired - Lifetime
Application number
EP20000303940
Other languages
German (de)
English (en)
Other versions
EP1052365A2 (fr
EP1052365A3 (fr
Inventor
Herman Oskam
Robert Jan Ponsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunter Douglas Industries BV
Original Assignee
Hunter Douglas Industries BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunter Douglas Industries BV filed Critical Hunter Douglas Industries BV
Priority to EP20000303940 priority Critical patent/EP1052365B1/fr
Publication of EP1052365A2 publication Critical patent/EP1052365A2/fr
Publication of EP1052365A3 publication Critical patent/EP1052365A3/fr
Application granted granted Critical
Publication of EP1052365B1 publication Critical patent/EP1052365B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/307—Details of tilting bars and their operation
    • 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
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape with coaxial tilting bar and raising shaft
    • 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
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B2009/285—Means for actuating a rod (being tilt rod or lift rod)

Definitions

  • the invention relates to a venetian blind, particularly an outside blind mounted externally of a building.
  • the invention especially relates to a venetian blind with an operating mechanism for raising, lowering and tilting its slats and a drive mechanism for moving the operating mechanism in opposite directions so that the operating mechanism can tilt the slats while their direction of movement is changed between lowering and raising them.
  • the invention particularly relates to a venetian blind having an operating mechanism with an intermediate pre-closure tilt position, which can be by-passed by reverse rotation of the slats.
  • the invention quite particularly relates to an operating mechanism having an adjustable full tilt-open stop, so that two or more, operating mechanisms can be used, for example, in tandem to operate two or more different (e.g., upper and lower) sections of slats in a blind to obtain different angles of full closure.
  • the invention also quite particularly relates to a transmission which is operatively interposed between the operating mechanism and the drive mechanism to reduce the speed of movement of the operating mechanism during tilting of the slats.
  • the invention also relates to a tape winding core which can be adjusted to accommodate differences in length of a lifting tape of the blind, for example, for fine tuning the level of its bottom rail when installing the blind or for compensating for differences in elongation of its lift tape over time.
  • Venetian blinds with operating and drive mechanisms are generally known, for example from EP 0 684 361, EP 0 356 690, EP 0 190 626 (upon which the precharacterising portion of appended claim 1 is based), EP 0 097 627, DE 37 18 513 (C2), DE 33 13 833 (C2), GB 1 599 608 and US 2 237 539.
  • Such operating mechanisms have often been somewhat difficult to operate, in that tilting of the slats of their blinds from one end position to the other or continuing tilting beyond one of the end positions could easily result in unintentionally starting to raise the blinds again. Also, such operating mechanisms have frequently been rather difficult to assemble which, at times, has resulted in their faulty operation.
  • An adjustable tape winding core also is generally known, for example from DE 22 25 853.
  • a core has not always been easy to access in order to make adjustments, and it has also required a number of additional components in the operating mechanism in order to function properly.
  • an operating mechanism for raising, lowering and tilting the slats of a venetian blind; the operating mechanism comprising: a support body for rotatably receiving a rotatable drive shaft; a releasable clutch mechanism having at least a first element mounted for rotation by the drive shaft and a second element releasably engaged with the first element for moving the slats between opposite first and second angular end positions; and means defining the first and second angular end positions; characterized in further comprising: a retractable stop operatively engageable with the second element to arrest the second element in an intermediate position between the first and second angular end positions; and a lost motion mechanism between the drive shaft and the retractable stop for activating and deactivating the operative engagement of the retractable stop with the second element only after a predetermined number of revolutions of the drive shaft.
  • This operating mechanism can be made to operate reliably and efficiently even in a hostile environment on the exterior of a building. It can also be more easily and less expensively assembled and operated.
  • the means defining the first and second angular end positions of the operating mechanism include arresting means on the support body adapted to operatively cooperate with the second element.
  • the second element of the releasable clutch mechanism is adapted to move the slats by means of a pivotal tilt element including a first ring a second ring and a timer ring, all rotatably engaged on the first element, the pivotal tilt element thereby being adapted to tilt the slats between the opposite first and second angular end positions.
  • the lost motion mechanism includes a driven member drivingly engaged by the drive shaft and having a first circumferential projection, at least one lost motion disc has a second circumferential projection and an annular cam member, the first projection is adapted to engage the lost motion disc only upon a predetermined amount of rotation after each change of rotational direction, and the second projection is adapted to engage, in turn, the annular cam member.
  • a transmission for a venetian blind, which can be operatively interposed between a drive mechanism of the blind and the operating mechanism of this invention and which comprises: a planetary gear transmission that has a casing fixedly mounted in a head rail of the venetian blind; a sun gear drivingly engaged by the drive mechanism for rotation in opposite directions; a plurality of planet gears, in driven engagement with the sun gear; a planet gear output carrier carrying the planet gears and drivingly engaging the operating mechanism; an internally toothed ring gear surrounding the plurality of planet gears in driven engagement therewith; a wrap spring positioned concentrically between the casing and the ring gear for releasably retaining the ring gear in the casing against rotation; the ring gear having a protrusion, engaging a tang at one end of the second wrap spring; and a finger on the planet carrier engaging a tang at the other end of the wrap spring in a direction of releasing the wrap spring and the ring gear from the casing for rotation with the
  • a venetian blind particularly an outside blind mounted externally of a building, is provided and comprises the operating mechanism and/or the transmission of this invention.
  • the venetian blind includes at least two operating mechanisms, an upper section of slats, and a lower section of slats; wherein a first operating mechanism has one of its angular end positions differing from those of a second operating mechanism; and wherein the first operating mechanism is adapted to tilt the slats of the lower section and the second operating mechanism is adapted to tilt the slats of the upper section.
  • an adjustable tape winding core for a venetian blind, which can be used in the operating mechanism of this invention, which can be adjusted to accommodate differences in length of a lifting tape of the blind, and which comprises: a pulley body with a spool between a pair of pulley flanges; the spool having a screw thread, in which is rotatably received an adjustment screw plug, preferably having a width about equal to the distance between the pulley flanges.
  • FIG. 1-5 An operating mechanism 1 of this invention is shown in Figures 1-5. It includes a support body 3 which, together with a support body cover 5, forms a housing enclosing components of a clutch mechanism 4 for engaging and disengaging rear and front, ladder side cords 7 and 9 that pivotally tilt the slats 11 of an otherwise conventional venetian blind 12.
  • the support body 3, as best shown in Figure 3, has a longitudinally-extending, rotatable drive shaft 13 extending axially through it.
  • the drive shaft 13 is driven by a conventional reversible motor or the like, either directly or through a transmission as shown in Figures 7-9.
  • the clutch mechanism 4, within the support body 3, is mounted for rotation by the drive shaft 13.
  • the clutch mechanism includes: as a first element, a pulley body 15 that rotates with the drive shaft 13; and as a second element, a first wrap spring 17 that is releasably engaged, by friction with the pulley body 15.
  • the pulley body 15 takes the form of a conventional pulley body for a spool for winding a lift tape (not shown) in order to raise the slats of a blind.
  • the pulley body 15 includes an outwardly cylindrical, rearwardly-extending first hub 19 for accommodating the first wrap spring 17 on its exterior surface and a central non-circular axially-extending first bore 21 within it.
  • the first bore 21 has a cross-sectional shape that is complementary to the rectangular cross-section of the drive shaft 13, within it.
  • the pulley body 15 also includes a rearward first pulley flange 23 and a frontal second pulley flange 25, which are parallel and together form a spool for winding a lift tape (not shown) at the front end of the pulley body.
  • the second pulley flange 25 is preferably formed as a separate element which simplifies the manufacture of the pulley body 15.
  • the first wrap spring 17 has a first radially outwardly-deflected tang or end 27 and a second radially outwardly-deflected tang 29.
  • the first tang 27 of the first wrap spring 17 engages a first ring 31, and its second tang 29 engages a second ring 33 that is adjacent to, and rearwardly of, the first ring.
  • the front of the first ring 31 has a frontally-open radially-extending first groove 31A (shown in Figure 3A), in which the first end 27 of the first wrap spring 17 is accommodated in a conventional manner
  • the front of the second ring 33 has a frontally-open radially-extending second groove 33A (shown in Figure 3B), in which the second tang 29 of the first wrap spring 17 is accommodated in a conventional manner.
  • the first ring 31 also has a rearwardly-extending first finger 35, spaced radially away from the drive shaft 13.
  • a central axial second bore 37 through the first ring 31 enables it to be journalled about the first hub 19 of the rotatable pulley body 15 while leaving an annular gap around the front part of the first hub to accommodate the first wrap spring 17.
  • the radially-extending first groove 31A on the front of the first ring 31 also opens on to the second bore 37.
  • the second ring 33 has a central axial third bore 39, by which the second ring is journalled on an outwardly cylindrical, rearwardly-extending second hub 41 of the first ring 31.
  • the first ring 31 and the front of its second hub 41 have a radially- and axially-extending third groove 43 to accommodate the second end 29 of the first wrap spring 17 when jounalling the second ring 33 on the second hub 41.
  • the radially-extending second groove 33A on the front of the second ring 33 also opens on to its third bore 39 and the third groove 43 of the first ring in the assembled operating mechanism 1.
  • the second ring 33 also has an outwardly cylindrical, rearwardly-extending third hub 44 and an axially-open radially-curved window 45, which is spaced radially away from the drive shaft 13 by the same distance as the first finger 35.
  • the front of the second ring 33 has a surface member 46 which covers the front of the window 45 between the second groove 33A of the second ring and an adjacent lateral side 45A of the window.
  • the first finger 35 of the first ring 31 extends rearwardly into the front of the window 45, adjacent the lateral side 45A of the window and the surface member 46, when the first and second rings 31 and 33 are concentrically journalled on the first hub 19 of the pulley body 15 in the operating mechanism 1.
  • the first finger 35 can move, within the window 45, laterally away from the lateral side 45 A of the window, but is prevented by the first tang 27 of the wrap spring 17 from moving laterally towards the lateral side 45A of the window.
  • the outer circumference of the first ring 31 has a first cavity 47 that is open to one lateral side for receiving and holding a tangentially-extending end portion of a first slat tilting cord 49 that is part of, or connected to, the rear ladder side cord 7.
  • the outer circumference of the second ring 33 has a similar second cavity 51 that is open to the opposite lateral side for receiving and holding a tangentially-extending end portion of a second slat tilting cord 53, that is part of, or connected to, the front ladder side cord 9.
  • first and second rings 31,33 rotation of the first and second rings 31,33 together causes the slat tilting cords 49, 53 to be wound in opposite directions about the first and second rings, which causes the front and rear ladder side cords 7,9 to move in opposite vertical directions, and thereby causes the front and rear edges of the slats 11 of the blind 12 to move in vertically opposite directions between first and second, angular end positions (i.e., open and closed positions).
  • the second ring 33 has a rearwardly-extending second finger 55, spaced radially away from the drive shaft 13 by the same distance as the first finger 35.
  • the second finger 55 borders circumferentially on one end of the axially-open window 45.
  • the second finger 55 extends into a mating radially-curved fourth groove (not shown) in the front of a timer ring 57 that is adjacent to, and rearward of, the second ring.
  • the fourth groove is spaced radially away from the drive shaft 13 by the same distance as the second finger 55 and has the about same length and width as the second finger.
  • the timer ring 57 establishes the first and second angular end positions of the slats 11.
  • the timer ring 57 engages and rotates coaxially together with the first and second rings 31,33.
  • the timer ring 57 has a central axial fourth bore 58, by which it is journalled on the third hub 44 of the second ring 33 and a frontally-extending third finger 59 (shown in Figure 3C).
  • the third finger 59 is spaced radially away from the drive shaft 13 by the same distance as the first and second fingers 35, 55 and is circumferentially located on the front of the timer ring between the first and second fingers in the operating mechanism 1.
  • the third finger 59 extends into the rear of the axially-open window 45 of the second ring 33, between, and closely adjacent to, the first and second fingers 35,55 and rearwardly of the front surface member 46 of the second ring when the first and second rings and the timer ring are all concentrically journalled about the first hub 19 of the pulley body 15.
  • the rear of the timer ring 57 (shown in Figure 3C) also has a slat tilt-open, angular position stop 61 and a slat tilt-closed, angular position stop 63 at different circumferential locations as described below.
  • the support body 3 is adapted to cooperate with the slat tilt-open and slat tilt-closed stops 61, 63 on the timer ring 57. Thereby, with the cooperation of the first and second rings 31,33 and the first wrap spring 17, the support body can be used to establish opposite first and second, angular tilt positions for the slats 11.
  • an abutment or arresting pin 65 can be inserted in a selected one of a plurality of frontally-extending holes 67 in the rear of the support body 3. As shown in Figure 3, the holes 67 are arranged in a circumferential arc about the drive shaft 13.
  • a frontally-extending central opening 69 is provided at the lower rear end of the support body 3, between holes 67, as shown in Figure 3 and described below.
  • an elongated, retractable stop lever 71 extends frontally through the central opening 69 of the support body 3.
  • the rear end 72 of the stop lever is adapted to serve as a handle, and a portion of the front end 72A can act, through the central opening 69, on an intermediate slat position stop 73 on the rear of the timer ring 57, at a circumferential location between its slat tilt-open and slat tilt-closed stops 61, 63.
  • the lever stops rotation of the timer ring 57, and thereby stops rotation of the first and second rings 31,33, in the direction for lowering the slats of the blind 12 (i.e., in the direction of arrow "C" in Fig. 3).
  • the first hub 19 of the pulley body 15 can continue to rotate in this direction with the drive shaft 13 within the fourth bore 58 of the timer ring 57 while the first and second rings 31,33 remain on the first hub 19 at an intermediate position of angular tilt, between the open and closed positions of the slats 11.
  • first ring 31 can continue to rotate a small distance with the first wrap spring tang 27, relative to the second ring 33 and the second wrap spring tang 29, as the wrap spring continues to frictionally engage the first hub 19. This loosens somewhat the grip of the wrap spring 17 on the first hub 19, so as to allow the pulley body 15 and drive shaft 13 to continue to rotate, even after the first and second rings 31,33 and the timer ring 57 no longer rotate.
  • a lost motion mechanism is operatively interposed between the drive shaft 13 and the stop lever 71.
  • the lost motion mechanism 74 is adapted to move the stop lever 71 axially, in and out of engagement with the intermediate stop 73 of the timer ring 57, only after a predetermined number of revolutions of the drive shaft 13.
  • the lost motion mechanism 74 includes a driven interposer member 75 (shown in Figure 4E) which is directly engaged with the drive shaft 13.
  • the front of the interposer member 75 has a flange 77, connected to a rearwardly-extending, outwardly cylindrical, fourth hub 79.
  • a first engagement projection 81 extends rearwardly from the rear of the flange 77.
  • the rear of the fourth hub 79 has a plurality of circumferentially-spaced, rearwardly-extending, flexible tongues 83, separated by axial slots 85 and each carrying a detent ridge 87 on its free rear end.
  • the lost motion mechanism 74 also includes two identical, adjacent, lost motion discs 89,90 (shown in Figure 4A) and an adjacent annular cam member 91 (shown in Figures 4B-D). Both lost motion discs 89,90 and the cam member 91 are rotatably journalled on the fourth hub 79 of the driven interposer member 75, while being axially retained thereon by the detent ridges 87.
  • the rear of each lost motion disc 89,90 has a rearwardly-extending second engagement projection 93,94, and the front of each lost motion disc (shown in Figure 4A) has an annular first groove 95,96 that is frontally open.
  • the first engagement projection 81 of the interposer member 75 engages the first groove 95 of the adjacent lost motion disc 89, and the second engagement projection 93 of the adjacent lost motion disc 89 thereafter engages the first groove 96 of the other lost motion disc 90.
  • the front of the cam member 91 (shown in Figure 4B) is also provided with an annular second groove 97 which is open frontally and engages the second engagement projection 94 of the adjacent disc 90.
  • the annular extent of each annular groove 95,97 is about 300° to provide a lost motion of approximately 900° of revolution of the drive shaft 13, but the grooves can have smaller or greater annular extents to provide less or more lost motion.
  • Laterally opposite sides of the cam member 91 have outwardly biased circumferential brake segments 99 and 101 which frictionally engage an inner cylindrical surface of a generally cylindrical housing 102 for the lost motion mechanism 74.
  • the rear of the housing 102 has a circular hole 103, the edge of which is adapted to engage the detent ridges 87 on the rear of the flexible tongues 83 of the fourth hub 79 of the interposer member 75 when the rear of the fourth hub, carrying the journalled lost motion discs 89,90 and cam member 91, is urged rearwardly through the hole 103 to assemble the lost motion mechanism 74.
  • an axially-extending channel-shaped extension 104 which accommodates the stop lever 71.
  • a bottom portion 105 of the extension 104 extends rearwardly of the housing 102.
  • the bottom of an upwardly-and frontally-inclined spring 107 is rearwardly and upwardly biased against the front of an upstanding projection (not shown) on the bottom of the extension 104 of the housing 102.
  • Front portions of the spring 107 enclose a rearwardly-extending projection 107A on the bottom of the stop lever 71, so that the front of the spring biases the stop lever upwardly and frontally, towards the timer ring 57.
  • a front stepped-end portion 109 of the stop lever 71 is urged frontally and upwardly against the rear of the timer ring 57;
  • a laterally-extending shallow groove 110 atop a middle portion of the stop lever is urged upwardly and frontally against the pivot 106;
  • a rear stepped-end portion 111 of the stop lever is urged frontally and upwardly through a longitudinally-extending opening (not shown) in the bottom of the housing 102 and against the rear of the cam member 91.
  • the rear of the cam member 91 (shown in Figures 4C-D) has a rearwardly-facing circumferential cam surface 112 which includes the rear surfaces of its brake segments 99,101.
  • the cam member 91 has, between its brake segments 99, 101, a rearwardly-extending projection 113 on its cam surface 112.
  • the projection 113 has a pair of laterally opposite sides 113A that converge somewhat radially inwardly of the cam member 91 (as shown by phantom lines in Figure 4C) and that also converge rearwardly towards a radially-extending flat rear side 113B.
  • the stepped guide track 114 is generally formed by a rearwardly-facing, radially inner, raised annular track 115 and a rearwardly-facing, radially outer, annular track 117, in front of the inner track 115.
  • Each track 115, 117 extends circumferentially between the slat-open and slat-closed angular position stops 61, 63 on the rear of the timer ring 57.
  • the intermediate stop 73 is formed as part of a recess 119 in the inner track 115.
  • the recess 119 in one rotational direction of the timer ring 57, is bordered by the intermediate stop 73, and in the opposite direction of rotation, it is bordered by an inclined ramp surface 121 leading to the outer track 117.
  • the pulley body 15 rotates with the drive shaft, causing: the first wrap spring 17 to rotate with the pulley body; the first ring 31 and its first finger 35 and the second ring 33 and its second finger 55 to rotate with the first wrap spring; the first slat tilting cord 49 to be wrapped about the circumference of the first ring 31 and the second slat tilting cord 53 to be unwrapped from about the circumference of the second ring 33; and thereby the rear ladder side cord 7 to move upwardly and the front ladder side cord 9 to move downwardly, so as to tilt the slats 11 of the blind 12 frontally downward.
  • Such rotation of the second finger 55 of the second ring 33 also causes: the timer ring 57 (which had been at rest against the slat-open angular position stop 61) and its third finger 59 to rotate with the second finger; and the front portion 109 of the stop lever 71 to move along the inner track 115 of the timer ring 57 until the front portion 109 reaches, and is pushed frontally and upwardly by the spring 107 into, the recess 119 where the front portion finally abuts against the intermediate stop 73. Then, such rotation of the timer ring 57 and first and second rings 31,33 will be stopped by the stop lever 71, causing the vertical movement of the ladder side cords 7,9 to stop. Thereby, the slats11 will not tilt further and will have only a partially closed angle of tilt. This is desirable from a user's point of view because it will only partly darken the inside of a room during lowering of the blind slats.
  • each angular position stop 61,63 will rotate with the timer ring 57 about the drive shaft 13 until the angular rotation of the stop causes it to hit the abutment pin 65, inserted in one of the holes 67 in the support body 3, on either side of the centrally-positioned stop lever 71.
  • the function of the lost motion mechanism 74 is to delay the repositioning or resetting of the stop lever 71 into the position of Figure 2 (i.e., engaging the inner track 115 of the timer ring 57) until after a predetermined number of rotations of the drive shaft 13 have occurred after reversing its direction of rotation.
  • each of the engagement projections 81, 93,94 of the interposer member 75 and lost motion discs 89,90 is engaged in an annular groove 95,96,97 of an adjacent disc 89,90 or cam member 91 of the lost motion mechanism.
  • Each engagement projection 81,93,94 will not rotate its neighboring lost motion disc or cam member until the former engages an end of any of the annular grooves 95,96,97 of the latter.
  • the rectangular drive shaft 13 passes through the center of the assembled operating mechanism 1 and its clutch mechanism 4 and lost motion mechanism 74 within its support body 3.
  • the support body 3 has: a receiving recess 125 between its lowermost axially-extending holes 67 and its central opening 69; and a cavity 127 in its cover 5 as shown in Figure 3.
  • ridges 129 on the bottom of the housing 102 for the lost motion mechanism 74 can be snap-fit in the receiving recess 125, and a detent 131, on top of the housing 102, can be snap-fit in the cavity 127.
  • the extension 104 of the housing 102 has rearwardly-open recesses 133,134 in the laterally opposite rear vertical walls 135 of its bottom portion 105.
  • the recesses 133,134 are adapted to temporarily hold laterally-extending pins 137 on laterally opposite sides of the rear portion 111 of the stop lever 71 when the housing 102 is to be attached to the support body 3 and clutch mechanism 1, shown in Figure 3.
  • the pins 137 should be moved out of the recesses 133,134 and upwardly, so that the pins can then freely move axially on smooth horizontal surfaces 138 on top of the bottom portion 105 of the extension 104, between its rear vertical walls 135 and the rear of the housing 102, and thereby allow free axial movement of the stop lever 71 within the extension 104.
  • a screw thread 139 is provided in the spool 140 of the pulley body 15 for rotatably receiving an adjustment screw plug 141.
  • the width of the screw plug 141 equals the axial distance between the pulley flanges 23,25.
  • slat-closed stop for obtaining full closure is preferably provided as an integral fixed stop or abutment formation on the inside of the support body 3.
  • the slat-open stop can, likewise, be provided as a fixed stop on the support body 3.
  • the slat-open stop be in the form of the abutment pin 65 which can be selectively inserted in any one of the holes 67 of the semi-circular array of holes in the rear of the support body 3.
  • This adjustable full-open stop allows one type of operating mechanism 1 of this invention to be used in a number of different ways.
  • two or more such operating mechanisms can be readily used in a tandem arrangement, as described below, to operate upper and lower sections of slats in a blind to obtain different angles of full opening of the slats.
  • Figure 6 shows such an alternative embodiment of a venetian blind 212, which is similar to the blind 12 of Figure 1 and for which corresponding reference numerals (greater by 200) are used below for describing the corresponding parts.
  • the blind 212 has a conventional longitudinally-extending head rail 214, in which are housed a plurality of operating mechanisms 201A, 201B, 201C and 201D of this invention that are each the same as the operating mechanism 1 of Figures 1-5.
  • the blind 212 also has a separately operated, upper section 216 of slats 211 and lower section 218 of slats 211.
  • a first pair of the operating mechanisms 201 B and 201 D tilt the upper section 216 of slats by means of a first pair of conventional ladder cords 220 and 222, each of which is connected to one of the first operating mechanisms 201B, 201 D, respectively.
  • Each of the first operating mechanisms 201B,201D is also connected to one of a pair of conventional lift tapes 224 and 226, respectively, with which the first operating mechanisms can raise and lower both the upper and lower sections 216,218 of slats 211.
  • Each lift tape 224,226 is also connected to a conventional bottom rail 228 which can be raised and lowered with the slat sections 216,218.
  • a second pair of operating mechanisms 201A and 201C are each offset to the left of one of the first operating mechanisms 201B,201D, respectively, and tilt the lower section 218 of slats 211 by means of a second pair of conventional ladder cords 230 and 232, each of which is connected to one of the second operating mechanisms 201A,201C, respectively.
  • the second ladder cords 230,232 are each guided and extend in close proximity to the first ladder cords 220,222 (for the upper slat section 216), respectively, and lift tapes 224,226, respectively.
  • the head rail 214 is provided with guiding pins 234 and 236, around which the second ladder cords 230,232 pass.
  • the blind 212 is thus especially adapted to regulate the amount of daylight passing through a window into a room so as, for example, not to interfere with the use of computer monitors in the room.
  • the abutment pins 65 (shown only in Figures 1-5) of the first operating mechanisms 201B,201D can be positioned to allow a greater angle of opening of the slats 211 of the upper section 216 than the angle of opening of the slats of the lower section 218, allowed by the position of the abutment pins 65 in the second operating mechanisms 201A,201C.
  • the blind 212 of Figure 6 provides such control, using only operating mechanisms 201A-201D with generally conventional components. Further light regulation with the blind 212 can be obtained in a known manner (e.g., from EP 0 303 107) by providing the slats 211 of the upper section 218 and the slats 211 of the lower section 216 with different reflective properties and/or different shapes and/or profiles and/or by providing different reflective properties on the upper and lower surfaces of the different slats.
  • the operating mechanisms 201A-201D are preferably all driven by a common longitudinally-extending, motor-driven shaft 238.
  • the motor-driven shaft 238 is coupled to a reversible electric motor 240 and is used both to lower and raise the slats 21 at a relatively rapid speed and to adjust their angle of tilt at a moderate speed.
  • opposite ends of the motor-driven shaft 238 are provided with a pair of gear transmissions, generally 400 and 402 connected, respectively, to: the pair of operating mechanisms 201A,201B for the ladder cords 230,220 on one longitudinal side of the blind 212; and the operating mechanisms 201C,201D for the pair of ladder cords 232,222 on the other longitudinal side of the blind.
  • the gear transmissions 400,402 are each driven by the motor-driven shaft 238, extending from opposite sides of the motor 240, while the operating mechanisms are driven by output shafts 404 and 406 of the gear transmissions extending to and through the pairs of operating mechanisms 201 A,201 B and 201 C,201 D, respectively, on longitudinally opposite sides of the blind.
  • Figures 7-9 show one of the gear transmissions 400 which is preferably identical to the other gear transmission 402.
  • the transmission 400 preferably is an epicyclic or planetary gear transmission having a stationary casing 408.
  • the casing 408 is provided with holding elements 410, 412, 414 and 416 for fixedly mounting the casing in the head rail 214 (not shown in Figures 7-9).
  • the gear transmission 400 has an input drive member 418 that is drivingly engaged by the motor-driven shaft 238 (see Figure 6) and is integrally formed with a sun gear 420 that can rotate about a common longitudinally-extending axis of the drive shaft, input drive member and the casing 408.
  • planet gears 422, 424, 426 and 428 In driven engagement with the sun gear 420 are four circumferentially-spaced, planet gears 422, 424, 426 and 428 which can revolve about the axis of the casing 408 and are rotatably journaled on a planet gear output carrier 430.
  • the planet gear carrier 430 has, on longitudinally opposite sides, a first half 430A (journalled on the input drive member 418) and a second half 430B (connected to the output shaft 404).
  • Each planet gear carrier half 430A,430B is integrally formed with four journal shaft portions 432A,434A,436A,438A and 432B, 434B,436B,438B, respectively, for the planet gears 422,424,426,428.
  • journal shaft portions 432A-438A,432B-438B and the planet carrier halves 430A,430B are connected to each other, within the planet gears 422,424, 426,428, and are held together by snap-fit arms 440A, 442A, 444A and 446A on the first half 430A, inserted into snap-fit apertures 440B, 442B, 444B and 446B on the second half 430B.
  • the planet gear carrier 430 also has a protruding output socket 447 on its second half 430B for drivingly engaging the adjacent output shaft 404. (See Figure 6.)
  • the input drive member 418 of the gear transmission 400 accommodates a hexagonally contoured, motor-driven shaft 238, and the output socket 447 accepts a square-contoured, hollow output shaft 404, like the drive shaft 13 of Figures 1-5.
  • the hexagonal motor-driven shaft 238 can be rotatably received and accommodated in the hollow interior of the output shaft 404. This allows each transmission 400,402 to be used in larger blinds than that of Figure 6, in which additional sets of ladder cords are necessary.
  • the transmission 400 also has an internally toothed, ring gear 448, surrounding and meshing with the planet gears 422,424,426,428.
  • a second wrap spring 450 is concentrically positioned between the stationary casing 408 and the ring gear 448 for releasably retaining the ring gear in the casing and preventing the ring gear from rotating.
  • one or more, preferably a pair of, protrusions 452 and 454, on the outside circumference of the ring gear 448 engage the second wrap spring 450, between its radially-inwardly deflected tangs 456 and 458.
  • Rotation of the ring gear 448 with respect to the casing 408 is prevented by either one of the protrusions 452,454 acting on a confronting one of the tangs 456,458 in a direction expanding the second wrap spring 450 against an inner cylindrical surface 460 of the casing.
  • the second wrap spring 450 is biased in frictional engagement with the inner cylindrical surface 460 of the casing 408, and such frictional engagement is enhanced by any reaction force of the ring gear 448 through its protrusions 452,454 acting on the tangs 456,458 of the second wrap spring.
  • the planet gear carrier 430 also has a fourth finger 462 protruding from its first half 430A and received in an aperture 464 on its second half 430B.
  • the fourth finger 462 rotates with the planet gear carrier 430 to sweep through an arcuate path available between the second wrap spring 450 and the ring gear 448 and engage, at opposite ends of this path, one of the tangs 456, 458 of the second wrap spring in a direction of contracting the second wrap spring to release it from the inner surface 460 of the casing 408.
  • each epicyclic gear transmissions 400,402 is generally as follows.
  • the blind 212 of Figure 6 and its bottom rail 228 and upper and lower sections 216,218 of slats 211 are lowered by unwinding the lift tapes 224,226 from their spool components 23,25 (shown only in Figures 1-5) in the first operating mechanisms 201B,201D.
  • the finger 462 on the planet gear carrier 430 rotates in the same direction as the sun gear 420 rotates and the planet gears 422-428 revolve.
  • a lost motion mechanism 74 (shown only in Figures 1-5) on each operating mechanism 201A-201D allows tilting of the slats 211 before the bottom rail 228 and slats start to be raised. Simultaneously with this tilting action, the fourth finger 462 disengages itself from the adjacent second wrap spring tang 456 or 458 and starts moving in the opposite rotational direction with the sun gear 420 and planet gears 422-428.
  • an internal sleeve 466 is closely fitted within the second wrap spring 450 to restrict and control its inward contraction. Without this sleeve 466, the second wrap spring 450 would tend to deform substantially more in the region of its tangs 456, 458, rather than deforming with a more desirable, progressive contraction throughout the full length of its windings.
  • the internal sleeve 466 substantially eliminates this adverse tendency found in generally all wrap springs with radially deflected ends.
  • each ring gear protrusion 452,454 has a recessed portion 468 and 470, respectively, for accommodating the confronting the second wrap spring tangs 456, 458.
  • the remaining outer surface of each ring gear protrusion 452,454 distributes the engagement force directly on the fourth finger 462 of the planet gear carrier, rather than only via the second wrap spring tangs 456,458. This has been found desirable because during lifting of the blind 212, the entire force from the input drive member 418 to the output socket 447 will be transferred through the fourth finger 462 of the planet gear carrier 430 and the ring gear protrusions 452,454.
  • a removable locking pin 472 can be provided for locking each gear transmission 400,402 in one of its end positions.
  • the locking pin 472 can be used to synchronize the functioning of the gear transmissions 400, 402 which is preferred, for example, if it is desired that the transmissions, as shown in Figure 6, rotate in opposite directions.
  • Each locking pin 472 can be fitted in a gear transmission 400,402 prior to assembly of the blind 212 but will be removed after assembly and before the blind is put into service.
  • the locking pin 472 can also assist in the assembly of the transmission itself, which can then always be assembled, for example, as a right hand drive transmission. (In case a left hand drive transmission is desired, one can simply take out the locking pin, rotate the sun gear 420 and planet gear carrier 430 through their full rotation in an opposite direction, and then reinsert the locking pin.)

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)

Claims (12)

  1. Mécanisme de commande (1) pour relever, abaisser et incliner les lattes (11) d'un store vénitien (12) ; le mécanisme de commande comprenant :
    - un corps de support (3) pour recevoir à rotation un arbre de commande rotatif (13) ;
    - un mécanisme de débrayage comportant au moins un premier élément (15) monté pour une rotation par l'arbre de commande et un second élément (17, 31, 33, 57) coopérant de façon libérable avec le premier élément pour déplacer les lattes entre des première et seconde positions d'extrémité angulaire opposées ; et
    - des moyens définissant les première et seconde positions d'extrémité angulaire ;
    caractérisé en ce qu'il comprend, de plus :
    - un élément d'arrêt rétractable (71) pouvant coopérer de façon fonctionnelle avec le second élément (17, 31, 33, 57) pour arrêter le second élément dans une position intermédiaire entre les première et seconde positions d'extrémité angulaire ; et
    - un mécanisme de mouvement à vide (74) entre l'arbre de commande (13) et l'élément d'arrêt rétractable (71) servant à activer et à désactiver la coopération fonctionnelle de l'élément d'arrêt rétractable (71) avec le second élément (17, 31, 33, 57) seulement après un nombre prédéterminé de tours de l'arbre de commande (13).
  2. Mécanisme de commande selon la revendication 1 dans lequel les moyens définissant les première et seconde positions d'extrémité angulaire (61, 63, 65) comprennent des moyens d'arrêt (65) sur le corps de support (3), adaptés pour coopérer fonctionnellement avec le second élément (31, 33, 57).
  3. Mécanisme de commande selon la revendication 1 ou la revendication 2 dans lequel le second élément (17, 31, 33, 57) est adapté pour déplacer les lattes (11) au moyen d'un élément d'inclinaison pivotant incluant une première bague (31), une seconde bague (33) et une bague de minuteur (57), toutes engagées à rotation sur le premier élément (15) ; l'élément d'inclinaison pivotant étant adapté pour incliner les lattes (11) entre les première et secondes positions d'extrémité angulaire.
  4. Mécanisme de commande selon la revendication 3 dans lequel la bague de minuteur (57) comporte un élément de blocage de latte en position d'inclinaison ouverte (61) et un élément de blocage de latte en position d'inclinaison fermée (63).
  5. Mécanisme de commande selon la revendication 4 dans lequel la bague de minuteur (57) comprend un élément de blocage intermédiaire (73) entre l'élément de blocage de latte en position d'inclinaison ouverte (61) et l'élément de blocage de latte en position d'inclinaison fermée (63).
  6. Mécanisme de commande selon l'une quelconque des revendications 1 à 5 dans lequel le mécanisme de mouvement à vide (74) comporte un élément mené (75), engagé de façon à être mené par l'arbre de commande (13) et comprenant : une première partie en saillie périphérique (81) ; un disque de mouvement à vide (89 ; 90) possédant une seconde partie en saillie périphérique (93 ; 94) ; et un élément de came annulaire (91) ; la première partie en saillie (81) étant adaptée pour engager le disque de mouvement à vide (89 ; 90) seulement sur une quantité de rotation prédéterminée après chaque changement de direction de rotation ; et la seconde partie en saillie (93 ; 94) étant, à son tour, adaptée pour coopérer avec l'élément de came annulaire (91).
  7. Mécanisme de commande selon l'une quelconque des revendications 3 à 6 dans lequel la bague de minuteur (57) comporte une piste annulaire à gradins (114) présentant une piste intérieure annulaire relevée (115) et une piste annulaire extérieure (117) et dans lequel l'élément d'arrêt rétractable (71) est adapté pour coopérer avec l'une ou l'autre des pistes annulaires intérieure ou extérieure (115 ; 117).
  8. Mécanisme de commande selon la revendication 7 dans lequel l'élément d'arrêt intermédiaire (73) est formé dans la piste annulaire intérieure (115).
  9. Mécanisme de commande selon l'une quelconque des revendications 2 à 8 dans lequel le moyen de retenue (65) placé sur le corps de support est une broche de butée (65) pouvant être insérée sélectivement dans une ouverture sélectionnée parmi une pluralité d'ouvertures (67), disposées en arc sur le corps de support.
  10. Mécanisme de commande selon l'une quelconque des revendications 1 à 9 dans lequel le premier élément (15) est un corps de poulie qui tourne avec l'arbre de commande (13) et le second élément (17, 31, 33, 57) est un premier ressort à enroulement (17) qui est engagé de façon libérable, de préférence, par friction, avec le corps de poulie (15) ; dans lequel le corps de poulie comprend un manchon cylindrique dirigé vers l'extérieur, s'étendant axialement, (19) pour loger le premier ressort à enroulement (17) sur sa surface extérieure et, à l'intérieur de lui, un alésage central non circulaire s'étendant axialement (21), présentant une forme de section transversale qui est complémentaire de la section transversale de l'arbre de commande (13)qui est à l'intérieur du manchon.
  11. Mécanisme de commande selon l'une quelconque des revendications 1 à 10 dans lequel le premier élément (15) comprend :
    un corps de poulie comportant une paire de flasques de poulie espacées (23, 25) définissant entre eux un support d'enroulement ;
    le support d'enroulement étant pourvu d'un filetage de vis (139) pour recevoir à rotation un bouchon fileté de réglage (141), le bouchon fileté présentant une largeur égale approximativement à la distance comprise entre les flasques de poulie (23, 25), de façon à fournir un noyau d'enroulement de bande à diamètre réglable qui peut être ajusté par vissage ou dévissage du bouchon fileté pour recevoir des longueurs différentes d'une bande de levage.
  12. Store vénitien comportant le mécanisme de commande selon l'une quelconque des revendications 1 à 10.
EP20000303940 1999-05-11 2000-05-10 Dispositif d'entraînement pour un store vénitien Expired - Lifetime EP1052365B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20000303940 EP1052365B1 (fr) 1999-05-11 2000-05-10 Dispositif d'entraînement pour un store vénitien

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP99201457 1999-05-11
EP99201457 1999-05-11
EP20000303940 EP1052365B1 (fr) 1999-05-11 2000-05-10 Dispositif d'entraînement pour un store vénitien

Publications (3)

Publication Number Publication Date
EP1052365A2 EP1052365A2 (fr) 2000-11-15
EP1052365A3 EP1052365A3 (fr) 2000-12-06
EP1052365B1 true EP1052365B1 (fr) 2004-12-29

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ID=26073153

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EP20000303940 Expired - Lifetime EP1052365B1 (fr) 1999-05-11 2000-05-10 Dispositif d'entraînement pour un store vénitien

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211011A2 (fr) 2009-01-27 2010-07-28 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
EP2211012A2 (fr) 2009-01-27 2010-07-28 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
EP2620582A2 (fr) 2012-01-27 2013-07-31 WAREMA Renkhoff SE Installation de protection solaire à lamelles
WO2019147598A1 (fr) * 2018-01-23 2019-08-01 Wedgerock Llc Mécanisme de maintien et de relâchement d'appareil d'engrenages épicycloïdaux à faible force

Families Citing this family (8)

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ATE444432T1 (de) * 2001-01-16 2009-10-15 Vkr Holding As Elektrische betätigungsanordnung für jalousie
US7654301B2 (en) * 2003-03-31 2010-02-02 Joern Krab Holding Aps Venetian blind
AU2013225057B2 (en) * 2012-02-27 2017-03-23 Hunter Douglas Industries B.V. Blind tilt assembly and method of controlling tilt ladders
JP6640511B2 (ja) * 2015-09-29 2020-02-05 立川ブラインド工業株式会社 日射遮蔽装置の駆動力伝達装置
US10337243B2 (en) 2017-04-10 2019-07-02 Mechoshade Systems, Llc Geared bracket for a window shade
US10954716B2 (en) 2017-09-21 2021-03-23 Hunter Douglas Inc. Lift station for a covering for an architectural structure
AU2018253645B2 (en) 2017-10-31 2024-08-01 Hunter Douglas Industries B.V. Control mechanism for a double pitch blind and a double pitch blind assembly
IT201900002755A1 (it) * 2019-02-26 2020-08-26 Lupak Metal S R L Apparato frangisole

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US2237539A (en) 1939-04-12 1941-04-08 Ruth P Ingalls Sectional venetian blind
DE2726452A1 (de) 1977-06-11 1979-05-23 Hunter Douglas Ind Bv Antrieb fuer eine lamellenjalousie
SE8203812L (sv) * 1982-06-18 1983-12-19 Perma System Ab Lagerbock for fasadpersienner
DE3313833A1 (de) 1983-04-16 1984-10-18 Hüppe GmbH, 2900 Oldenburg Wendevorrichtung einer lamellenjalousie
DE8503040U1 (de) 1985-02-05 1985-06-20 Hunter Douglas Industries B.V., Rotterdam Wendevorrichtung für eine Lamellenjalousie
DE3718513C2 (de) 1987-06-03 1994-04-14 Warema Renkhoff Gmbh & Co Kg Wendevorrichtung für eine raffbare Lamellenjalousie
DE3829664C1 (fr) 1988-09-01 1990-01-18 Karl Dungs Gmbh & Co, 7060 Schorndorf, De
US5228491A (en) * 1992-04-03 1993-07-20 General Clutch Corporation Monocontrol venetian blind
DE59406836D1 (de) 1994-05-28 1998-10-08 Baumann Hans Peter Raff- und Schwenkvorrichtung für Lamellenstoren
AU4781096A (en) * 1995-03-06 1996-09-23 Norbert Marocco Combined tilt and raise control for window coverings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211011A2 (fr) 2009-01-27 2010-07-28 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
EP2211012A2 (fr) 2009-01-27 2010-07-28 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
EP2211012A3 (fr) * 2009-01-27 2014-04-02 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
DE202010018243U1 (de) 2009-01-27 2014-11-26 Franz Kraler Antriebs- und Wendevorrichtung für die Lamellen einer Jalousie
EP2211012B1 (fr) 2009-01-27 2015-11-04 Franz Kraler Dispositif d'entraînement et de déplacement pour les lamelles d'un store
EP2620582A2 (fr) 2012-01-27 2013-07-31 WAREMA Renkhoff SE Installation de protection solaire à lamelles
EP2620582A3 (fr) * 2012-01-27 2015-09-16 WAREMA Renkhoff SE Installation de protection solaire à lamelles
WO2019147598A1 (fr) * 2018-01-23 2019-08-01 Wedgerock Llc Mécanisme de maintien et de relâchement d'appareil d'engrenages épicycloïdaux à faible force

Also Published As

Publication number Publication date
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EP1052365A3 (fr) 2000-12-06

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