EP2677108B1 - Unit for stacking slats on a support ladder provided with double cross-beams for the production of venetian blinds and method for positioning a ladder - Google Patents

Unit for stacking slats on a support ladder provided with double cross-beams for the production of venetian blinds and method for positioning a ladder Download PDF

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Publication number
EP2677108B1
EP2677108B1 EP12195143.8A EP12195143A EP2677108B1 EP 2677108 B1 EP2677108 B1 EP 2677108B1 EP 12195143 A EP12195143 A EP 12195143A EP 2677108 B1 EP2677108 B1 EP 2677108B1
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EP
European Patent Office
Prior art keywords
ladder
cross
beams
stacking unit
guiding device
Prior art date
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Application number
EP12195143.8A
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German (de)
English (en)
French (fr)
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EP2677108A1 (en
Inventor
Sergio Dallan
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.)
Dallan SpA
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Dallan SpA
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Priority to PL12195143T priority Critical patent/PL2677108T3/pl
Priority to SI201230103T priority patent/SI2677108T1/sl
Publication of EP2677108A1 publication Critical patent/EP2677108A1/en
Application granted granted Critical
Publication of EP2677108B1 publication Critical patent/EP2677108B1/en
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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
    • E06B9/266—Devices or accessories for making or mounting lamellar blinds or parts thereof

Definitions

  • the subject of the present invention is a unit for stacking slats on a support ladder provided with double cross-beams for the production of Venetian blinds and a method for positioning a ladder.
  • Venetian blinds consist of a number of slats, positioned parallel to one another and held in place by support structures made of cord. These structures consist of two parallel longitudinal elements (positioned in the direction of the height of the blind) and of a plurality of cross-beams that connect the two longitudinal elements together at regular distances. Each cross-beam is associated with a slat. Due to their shape, said support structures are generally known as "support ladders”.
  • the support ladders are simpler, with single cross-beams, spaced apart.
  • the single slat is inserted between one cross-beam and the other and simply rests on the cross-beam beneath it.
  • the distance between one cross-beam and the other is equivalent to the distance required between one slat and the next (a few centimetres). This means that the insertion of the slats is very easy.
  • the support ladders In Venetian blinds for exterior use, the support ladders have to ensure that the slats do not twist over in the wind, so they have a more complex structure, with pairs of cross-beams, positioned close together to form an eyelet. The slat is inserted into the eyelet, between the two cross-beams. In this way, the position of the slat is more stable.
  • the support ladders with double cross-beams which have been available on the market for some time have distances D between the two cross-beams of between 3 and 4 mm, as shown in Figure 1 , substantially equal to the height of a slat with a curved section. Distances D of 3-4 mm have provided a good compromise between an effective blocking action and easy fitting of the slats onto the ladders.
  • each cross-beam made with two or more crossed cords, as shown in Figure 5 .
  • the distance D between the cross-beams is usually 1 mm.
  • the multi-cord structure makes the cross-beam stronger.
  • the ladder To allow effective intervention of the divaricators, the ladder must be correctly positioned in the area of intervention of said divaricators. It is not easy to control the positioning of the ladder, because it is not rigid, meaning that it moves around, and because the ladders are often made with considerable dimensional tolerances. In said conditions, working with ladders with maximum distances D between the cross-beams of 1 mm or with asymmetrical cross-beam structures has been difficult to date.
  • the mobile stop teeth are positioned at the same height as the slat insertion plane and act as the mechanical means of reference.
  • the two cross-beams that form the eyelet into which the slat has to be inserted must pass the stop teeth and allowed to rest against them.
  • the system comprises a device that uses a weight to stretch the ladder vertically, acting on the vertical ribs.
  • the purpose of the present invention is to eliminate all or part of the problems of the above-mentioned technique, making available a unit for stacking slats on a support ladder for the production of Venetian blinds which allows the reliable insertion of the slats on any type of ladder.
  • Another purpose of the present invention is to make available a unit for stacking slats which does not vertically stretch the ladders, preventing the narrowing of the cross-beams and reduction of the space for insertion between them.
  • Another purpose of the present invention is to make available a unit for stacking slats which allows the correct positioning of the ladder in a way that is easy to manage.
  • Another purpose of the present invention is to make available a unit for stacking slats which is cheap and easy to make.
  • Another purpose of the present invention is to make available a method for positioning a ladder in a unit for stacking slats that allows the correct positioning of the ladder in a way that is simple and reliable.
  • the reference numeral 1 is used to indicate a unit for stacking slats on a support ladder with double cross-beams for the production of Venetian blinds according to the invention.
  • the stacking unit 1 is destined to be included - together with one or more identical units - in a more complex production system.
  • unit 1 can be moveably associated to a longitudinal support bar (not shown) at one end of which there is a slat production machine (not shown).
  • stacking unit 1 comprises at least one guide element 2 for a slat L, which defines an insertion plane m on which the slat L slide, resting on a longitudinal insertion axis X to be associated with the ladder S, slotting into the gap between a pair of cross-beams T1, T2.
  • This guide element 2 should preferably consist of a laminar element rigidly fastened to a support structure 3 of the stacking unit.
  • Stacking unit 1 comprises:
  • the divaricating means 40 are placed near to the guiding device 20 to divaricate substantially on the insertion plane m.
  • the divaricating means 40 are structured and positioned with respect to the insertion plane m so that, when they have engaged a pair of cross-beams T1, T2 (correctly positioned), the two divaricated cross-beams are one above and one below the insertion plane m.
  • the divaricating means can be of any type suitable to the purpose.
  • the divaricating means 40 comprise two sickle-shaped rotating elements 41, 42 positioned specularly with respect to the longitudinal insertion axis X of the slat L.
  • both sickle-shaped elements 41 and 42 are associated to the support structure 3.
  • Each of them is preferably provided with means of activation 43 to allow their independent activation.
  • a more detailed description is not given as this type of divaricator is known per se to a skilled person in the art.
  • the ladder S slides along the guiding device 20 in an advancement direction A (indicated in Figure 1 for example) along the positioning direction p to progressively bring each pair of cross-beams P1, P2 in front of the divaricating means 40 and allow the insertion of a slat between every pair of cross-beams.
  • the sliding of the ladder takes place in steps, one for each pair of cross-beams.
  • the stacking unit 1 comprises means 20, 30 for moving the ladder S along the above-mentioned positioning direction p. Said means will be described in detail further ahead.
  • the stacking unit 1 comprises at least one sensor 50 to detect passage of a first cross-beam T1 of the ladder S in front of it during movement thereof along the positioning direction p.
  • the senor 50 is facing the guiding device 20 and is positioned at a predefined distance H from the insertion plane m with respect to the positioning direction p.
  • a pair of cross-beams T1, T2 of the ladder is therefore positionable in correspondence to the insertion plane m (ready for engagement by the divaricating means 40), if the above-mentioned movement means 20, 30 for moving the ladder by a tract equivalent to the above-mentioned predefined distance H along the positioning direction p are activated when the sensor (50) detects the passage of a first cross-beam (T1).
  • the means for moving the ladder comprise the guiding device 20.
  • the guiding device 20 of the ladder S comprises means 25 for holding the ladder and can be moved using first movement means 60 along the above-mentioned positioning direction p.
  • a pair of cross-beams T1, T2 of the ladder can be positioned in correspondence to the insertion plane m, holding the ladder S in the guiding device and moving said guiding device 20 by a tract equivalent to the predefined distance H along the positioning direction p, when the sensor 50 detects the passage of a first cross-beam of said pair.
  • the first movement means 60 of the guiding device 20 are chosen of the type that allows very precise control of the movement.
  • Said first means 60 preferably comprise an electric piston.
  • the ladder holding means comprise one or more frictioning elements to brake the sliding of the ladder S.
  • said frictioning elements can be of the preloaded spring ratchet type.
  • the means for holding the ladder comprise one or more blocking elements 25 of the ladder (S).
  • the means for holding the ladder are made of ratchets activated by pneumatic or hydraulic pistons (25), of which the operating intensity can be controlled. Depending on the intensity of activation of the pistons, the ratchets can slow down the sliding of the ladder or block it completely.
  • the senor 50 is of the optical type, like a micro camera or laser sensor.
  • the guiding device 20 of the ladder S comprises, in particular, two positioning guides 21, 22 spaced apart, each to receive one of the longitudinal ribs P1, P2 of the ladder S, which are transversally connected by pairs of cross-beams T1, T2.
  • the senor 50 is placed facing the device, in a position which, according to a projection parallel to the longitudinal axis X, is between the two guides 21, 22. In this way the sensor 50 is facing the area where the cross-beams pass.
  • the position of the sensor 50 is decentralised with respect to the centre line of the two guides, i.e. closer to one of the two guides, where the longitudinal ribs slide.
  • the cross-beams are visibly separate only near the longitudinal ribs, gradually coming closer together until they touch to each other, as they approach the centre.
  • the guiding device 20 is used to transversally tension the cross-beams T1, T2 which connect the two longitudinal ribs P1, P2 of the ladder S.
  • the device can be of any type suitable to the purpose, comprising two positioning guides 21, 22, each of which is used to transversally hold one of the longitudinal ribs P1, P2 of the ladder S.
  • the guiding device 20 comprise a support element 23, which can be moved using the first above-mentioned movement means 60 along the positioning direction p with respect to the fixed support structure 3. Both the guides 21, 22 are hinged to this support element 23.
  • guides 21, 22 can be divaricated at two ends 21', 22' via rotations in the respective hinged points 24 to change the level of tension of the cross-beams of the ladder.
  • the guides can each be moved by their own actuator 27, 28.
  • each guide 21, 22 has an entrance portion 21', 22' and an exit portion 21", 22".
  • the guides 21, 22 are hinged at the respective entrance portions 21', 22', so as to vary the distance between the exit portions 21", 22" via rotations around the respective hinging points 24 and vary the level of tension of the pair of cross-beams positioned at the exit portions.
  • the two guides 21, 22 rotate on the same plane, preferably vertical, with preferably horizontal hinging axes.
  • the guiding device 20 with guides 21, 21 that can be divaricated as described above ensures that the tighter pair of cross-beams is that positioned at the exit portion, i.e. the pair of cross-beams destined to engage with the divaricating means first.
  • the guiding device comprises at least one stop tooth 26, preferably with spring activation, which engages the ladder at a cross-beam T1, T2 to prevent the sliding of the ladder S in the opposite direction to advancement.
  • the stop tooth 26 has a function to prevent dropping and can, if necessary, be used to place the ladder S in a preliminary position. Said tooth no longer acts as a mechanical positioning reference. The possible preliminary position is in fact followed by a final positioning that brings the ladder to the correct position with respect to the insertion plane m.
  • the guiding device 20 comprises two stop teeth 26 positioned at the same height along the positioning direction p.
  • each tooth is positioned next to a guide 21, 22.
  • the stacking unit 1 comprises at least one slat loader 10.
  • the loader can be of any type suitable to the purpose.
  • the loader 10 can be made up of two bars 11 and 12 provided with sprung teeth 13, 14 for the positioning of the slats already inserted in the ladder.
  • the stacking unit 1 comprises at least one lifting device 30 which is used to take a slat L from a position of insertion in the ladder S to a deposit position in the loader (see the sequence of Figures 12 and 13 ).
  • the movement of the slat L moves the ladder S associated to it in the guiding device 20.
  • the sliding of the ladder must be freed in the guiding device 20.
  • the guiding device 20 is activated so as to relax the cross-beams, thus preventing friction and jamming.
  • the lifting device 30 can be made up, for example, of a pneumatic, hydraulic or electric cylinder.
  • the lifting device 30 is independent from the guiding device 20. It is however possible to provide an alternative solution (not shown in the annexed Figures), in which the lifting device 30 is connected to the guiding device 20 to move it along the positioning direction p.
  • the loader 10 is placed before the divaricating means 40 and the guiding device 20 with respect to the direction of insertion of the slats along the longitudinal axis X.
  • the divaricating means and the guiding device are situated on the side of the loader opposite the slat entrance.
  • the stacking unit 1 can comprise an entrance element 4 for the single slats L, positioned before the loader 10 along the longitudinal axis X and preferably coplanar with the insertion plane m.
  • the stacking unit 1 is in the initial condition: the ladder has been positioned in the guiding device above the stop teeth 26; the divaricating means 41, 42 are deactivated and the two guides 21, 22 are not divaricated. Subsequently, guides 21, 22 are divaricated to tension the upper pair of cross-beams T1, T2; also the means 25 for holding the ladder should preferably be activated to block it in place ( Figure 7 ).
  • the guiding device 20 is lifted to bring the pair of cross-beams closer to the insertion plane m; the tensioned cross-beams T1, T2 transit in front of sensor 50 which can allow control of positioning according to above description ( Figure 8 ).
  • a first divaricator element 42 particularly of the sickle type ( Figure 9 ) is activated, followed by the second divaricator 41 ( Figure 10 ).
  • the slat is inserted between the two divaricated cross-beams ( Figure 11 ).
  • the divaricating means are withdrawn, the means 25 for holding the ladder are deactivated and the two guides are preferably brought closer ( Figure 12 ).
  • the slat L not blocked by the divaricating means is lifted with the lifting device 30 inside the loader above the first sprung teeth, dragging the ladder up too, until the second pair of cross-beams moves beyond the stop teeth 26 ( Figure 13 ).
  • the lifting device 30 can now be lowered.
  • the ladder is now ready for a new cycle.
  • the cross-beams do not necessarily have to rest on the stop teeth.
  • the subject of the present invention is also a method of positioning the support ladder (comprising a plurality of pairs of cross-beams T1, T2), for the production of Venetian blinds.
  • the method is applied to a stacking unit 1 according to the present invention.
  • the method comprises the following operating steps:
  • the sensor 50 is preferably of the optical type.
  • the method comprises a step f) of transversally tensioning the pair of cross-beams T1, T2.
  • step f) takes place before the approach step c).
  • the stacking unit 1 allows a correct positioning of the ladder S without necessarily having to vertically stretch the cross-beams to rest them against mechanical references. This prevents the cross-beams from being brought closer together and a further reduction of the space for passage.
  • the stacking unit 1 can therefore be used reliably with any type of ladder, even with ladders in which the distance between the cross-beams is less than 1 mm. This is made possible by the fact that the ladder can be positioned very precisely thanks to the presence of the sensor.
  • the stacking unit 1 is also simple to manage using a normal PLC, as well as being affordable and easy to make.
  • the absence of means for vertically stretching the ladders makes unit 1 easier to make and less problematic to manage in terms of maintenance.
  • the invention thus conceived achieves the aims set.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Plural Heterocyclic Compounds (AREA)
EP12195143.8A 2012-02-28 2012-11-30 Unit for stacking slats on a support ladder provided with double cross-beams for the production of venetian blinds and method for positioning a ladder Active EP2677108B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL12195143T PL2677108T3 (pl) 2012-02-28 2012-11-30 Urządzenie do układania listew na drabinie nośnej z podwójnymi poprzecznymi belkami do wytwarzania żaluzji z łat drewnianych oraz sposób ustawiania drabiny
SI201230103T SI2677108T1 (sl) 2012-02-28 2012-11-30 Enota za skladanje lamel na nosilno lestev z dvojnimi prečnimi nosilci za izdelavo žaluzij in postopek pozicioniranja lestve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000055A ITPD20120055A1 (it) 2012-02-28 2012-02-28 Unità di impilatura di lamelle su una scaletta di sostegno con traversi doppi per la produzione di tende veneziane e metodo di posizionamento di una scaletta

Publications (2)

Publication Number Publication Date
EP2677108A1 EP2677108A1 (en) 2013-12-25
EP2677108B1 true EP2677108B1 (en) 2014-09-17

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ID=46000133

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Application Number Title Priority Date Filing Date
EP12195143.8A Active EP2677108B1 (en) 2012-02-28 2012-11-30 Unit for stacking slats on a support ladder provided with double cross-beams for the production of venetian blinds and method for positioning a ladder

Country Status (6)

Country Link
EP (1) EP2677108B1 (sr)
IT (1) ITPD20120055A1 (sr)
PL (1) PL2677108T3 (sr)
PT (1) PT2677108E (sr)
RS (1) RS53698B1 (sr)
SI (1) SI2677108T1 (sr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3699389A1 (en) 2019-02-22 2020-08-26 Dallan S.p.A. Unit for stacking slats on a support ladder for the production of venetian blinds

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20130354A1 (it) * 2013-12-20 2015-06-21 Dallan Spa Unità di impilatura di lamelle su una scaletta di sostegno con traversi doppi per la produzione di tende veneziane e metodo di fissaggio di lamelle su una scaletta con traversi doppi
PL2990583T3 (pl) * 2014-08-29 2017-10-31 Dallan Spa Urządzenie do układania listewek żaluzji poziomych na konstrukcji wsporczej i sposób ustawiania konstrukcji wsporczej w urządzeniu do układania listewek
IT201800003095A1 (it) 2018-02-27 2019-08-27 Dallan Spa Stazione di assemblaggio di tende a veneziana con scalette complete di sostegno
IT201800003092A1 (it) 2018-02-27 2019-08-27 Dallan Spa Stazione di assemblaggio di tende a veneziana con scalette complete di sostegno
IT201800004958A1 (it) 2018-04-27 2019-10-27 Unità di impilatura di lamelle su una scaletta di sostegno per la produzione di tende veneziane e metodo di impilatura di lamelle su una scaletta di sostegno

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE09466023T1 (de) * 2009-10-15 2012-03-15 Zebr S.R.O. Stapeleinheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3699389A1 (en) 2019-02-22 2020-08-26 Dallan S.p.A. Unit for stacking slats on a support ladder for the production of venetian blinds

Also Published As

Publication number Publication date
EP2677108A1 (en) 2013-12-25
PL2677108T3 (pl) 2015-01-30
PT2677108E (pt) 2014-10-27
SI2677108T1 (sl) 2015-01-30
ITPD20120055A1 (it) 2013-08-29
RS53698B1 (sr) 2015-04-30

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