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EP1564359A1 - Porte-pignon d'un dispositif à crémaillère et roue dentée - Google Patents

Porte-pignon d'un dispositif à crémaillère et roue dentée Download PDF

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Publication number
EP1564359A1
EP1564359A1 EP04002900A EP04002900A EP1564359A1 EP 1564359 A1 EP1564359 A1 EP 1564359A1 EP 04002900 A EP04002900 A EP 04002900A EP 04002900 A EP04002900 A EP 04002900A EP 1564359 A1 EP1564359 A1 EP 1564359A1
Authority
EP
European Patent Office
Prior art keywords
bolt
rack
sprocket wheel
wheels
arm
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.)
Withdrawn
Application number
EP04002900A
Other languages
German (de)
English (en)
Inventor
Luigi Frati
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.)
Olva Srl
Original Assignee
Olva Srl
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 Olva Srl filed Critical Olva Srl
Priority to EP04002900A priority Critical patent/EP1564359A1/fr
Publication of EP1564359A1 publication Critical patent/EP1564359A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/02—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights
    • E05F11/08—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights with longitudinally-moving bars guided, e.g. by pivoted links, in or on the frame
    • E05F11/12—Mechanisms by which the bar shifts the wing
    • E05F11/14—Mechanisms by which the bar shifts the wing directly, i.e. without links, shifting the wing, e.g. by rack and gear or pin and slot
    • 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
    • E05F15/60—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
    • E05F15/63—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by swinging arms

Definitions

  • the present invention relates to a U-bolt for rack sprocket wheel, suitable for use in opening and closing glazing units of glasshouses and the like.
  • the internal micro-climate is more and more frequently controlled by detectors connected to computers that cause opening and closing of the ridge doors, i. e. the doors located on the glasshouse roof, so as to ensure that the fundamental parameters remain within the set limits. Consequently, the rack continuously performs a slow opening and closing movement to optimise the parameters of the internal micro-climate, instead of performing few operations a day and only in the warmest periods, as is the case for glasshouses where motor-driven door opening is controlled by means of push-buttons.
  • the door weight tends to push the sprocket wheel away from the rack due to the clearance between the rack and the U-bolt. Consequently, the sprocket wheel teeth work on their tips with an early wear, the sprocket wheel rubs in the groove of the U-bolt and bent sections 5 of the U-bolt rub against the rack edges, thus increasing friction. Under such conditions, the high usage increases friction and wear of the members, resulting in an extremely and unacceptably reduced life of the rack. Moreover, in some cases, at the maximum stress point, the teeth of the rack sprocket wheel can lose the pace by two or three holes.
  • the glasshouse ridge doors are several metres long (up to 60 - 80 metres) and that they are actuated by several racks arranged at a mutual distance of about 2 metres, if a rack loses the pace, the whole door weight and the whole drive of the gear motor are applied onto a single rack, causing its deformation and/or breaking.
  • the prior art U-bolt 1 is substantially a U-shaped iron of which the groove houses the sprocket wheel 3 (schematically shown by the axis crossing) and the rack-contrasting wings are formed of two bent sections 5, with inverted-V shape.
  • Figs 3, 4, 5 and 6 show U-bolt 7 according to the invention. More particularly, reference 9 denotes the U-shaped channel or rack, holes 11 of which are engaged by teeth 13 of sprocket wheel 15, rotatably mounted in U-bolt 7. Said U-bolt 7 has two upwards directed arms 17, each ending in a U-shaped portion 19 where a contrasting wheel 21, one for each arm, is rotatably mounted. U-bolt 7 has therefore two contrast wheels 31 mounted thereon, which wheels rest on the bottom of U-shaped channel 9. Said wheels are mounted onto a respective screw pin 23, to the other end of which a self-locking nut 25 is applied. Said wheels 21 are connected together by two metals plates 27, provided at the long sides to strengthen U-bolt 7.
  • Wheels 21 keep the distance between sprocket wheel 15 and rack 9 constant, thereby preventing teeth 13 from being outwards displaced and allowing said teeth to operate at a constant optimum distance. Wheels 21 have a greatly reduced friction and avoid blockage and considerably lengthen the life of rack 9. Moreover, plates 27 stiffen U-bolt 7 and prevent deformation even at high loads. Wheels 21, while rolling, spread again the lubricating grease in the working areas, thereby keeping a good lubrication even at high working intensities.

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  • Transmission Devices (AREA)
EP04002900A 2004-02-10 2004-02-10 Porte-pignon d'un dispositif à crémaillère et roue dentée Withdrawn EP1564359A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04002900A EP1564359A1 (fr) 2004-02-10 2004-02-10 Porte-pignon d'un dispositif à crémaillère et roue dentée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04002900A EP1564359A1 (fr) 2004-02-10 2004-02-10 Porte-pignon d'un dispositif à crémaillère et roue dentée

Publications (1)

Publication Number Publication Date
EP1564359A1 true EP1564359A1 (fr) 2005-08-17

Family

ID=34684649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002900A Withdrawn EP1564359A1 (fr) 2004-02-10 2004-02-10 Porte-pignon d'un dispositif à crémaillère et roue dentée

Country Status (1)

Country Link
EP (1) EP1564359A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726621A (en) * 1925-03-24 1929-09-03 Lord & Burnham Company Sash-operating mechanism
DE2160280A1 (de) * 1971-04-22 1972-11-02 Hütte Krems Gesellschaft mbH, Krems; Vereinigte Österreichische Eisen- und Stahlwerke AG, Linz; (Österreich) Zahnstangentrieb, insbesondere zum Öffnen und Schliessen von Luftklappen, Glashausfenstern od. dgl
DE3106872A1 (de) * 1981-02-24 1982-09-09 Dansk Gartneri-Teknik A/S, 2660 Brondby Strand Zahnstangenanordnung sowie deren verwendung bei einer oeffnungs- und schliesseinrichtung fuer dachklappen und oberlichter
EP0881409A1 (fr) * 1997-05-30 1998-12-02 Antoine Curau Dispositif d'ouverture à crémaillère à désalignement possible

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726621A (en) * 1925-03-24 1929-09-03 Lord & Burnham Company Sash-operating mechanism
DE2160280A1 (de) * 1971-04-22 1972-11-02 Hütte Krems Gesellschaft mbH, Krems; Vereinigte Österreichische Eisen- und Stahlwerke AG, Linz; (Österreich) Zahnstangentrieb, insbesondere zum Öffnen und Schliessen von Luftklappen, Glashausfenstern od. dgl
DE3106872A1 (de) * 1981-02-24 1982-09-09 Dansk Gartneri-Teknik A/S, 2660 Brondby Strand Zahnstangenanordnung sowie deren verwendung bei einer oeffnungs- und schliesseinrichtung fuer dachklappen und oberlichter
EP0881409A1 (fr) * 1997-05-30 1998-12-02 Antoine Curau Dispositif d'ouverture à crémaillère à désalignement possible

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