EP2314822B1

EP2314822B1 - Stacking unit

Info

Publication number: EP2314822B1
Application number: EP09466023.0A
Authority: EP
Inventors: Frantisek Zelinka
Original assignee: ZEBR sro
Current assignee: ZEBR sro
Priority date: 2009-10-15
Filing date: 2009-10-15
Publication date: 2020-04-08
Anticipated expiration: 2029-10-15
Also published as: DE09466023T1; EP2314822A1

Description

Technical Field

The invention relates to the stacking unit of the machine for production of sun-blind lamellas adjustable on the longitudinal beam of the machine.

Contemporary state-of-art

In production of sun-blind lamellas there is known the use of stacking devices with stacking units that put sun-blind lamellas between the loops of two or more supporting rope ladders. This is used for stacking of internal window sun-blind lamellas, in case of which it is not necessary to secure the sun-blind lamellas from displacement in the ladder loop. The problem with stacking occurs in case of stacking of cross-wise deflected long and wide sun-blind lamellas for fore-window use, when the sun-blind lamellas are not freely beaded to the loops of the supporting rope ladder but between two lateral branches, pushed aside in approximately the height of one sun-blind lamella. The branches separate the individual loops of supporting, usually rope ladders. Reliable lead of the sun-blind lamella can be performed only under condition that the transversal branches of the supporting ladder are strung enough and simultaneously pushed aside in such a way so as the sun-blind lamella may freely pass between them - otherwise, the sun-blind lamella is lead directly to the supporting ladder loop in better case or - in worse case - it cuts any of the transversal branches. Then, the supporting ladder must be manually replaced in both cases. In case of high operation speed. The problem of sun-blind lamellas leading has not not been satisfactorily solved by now. The cause includes the supporting ladder of unstable shape and its significant dimension tolerances as well as the shape and dimensions of sun-blind lamellas for external use. Their length reaches several meters, with significant width and high operation speed, which causes the tendency of vibrations.
The problem is partially solved in CZ 17826 , where transversal stretching of the ladder is arranged using suspended guides placed on a horizontal axis. It proves that in case of high speeds of sun-blind lamellas stacking and in case of using several stacking units placed one after each other, there is indicated reduced reliability of dividing the transversal branches of the ladder and the lay out of ladder dividers and the introduction slip of lamellas is also not ideal for speeding up the stacking.

Base of Technical Solution

The task of the technical solution is to create a stacking device, mainly for long sun-blind lamellas beaded among two transversal branches of the supporting ladder, that would be of simple construction and easy adjustable with high efficiency. The above stated task is fulfilled to a significant level by the stacking device according to this technical solution based mainly on the fact that it contains a vertical tank, on one side of which there is put at least one lifter of sun-blind lamellas and on the other side the reflected dividers of transversal branches of the ladder, while the dividers of transversal branches face vertically- and side-movable guides of longitudinal branches of the ladder and vertically placed stretching unit.
It is advantageous for the position keeping of the supporting ladder if the stretching unit comprises a weight placed in vertical guide and the weight carries the auxiliary leads of longitudinal branches of the ladder, equipped with lockable stops, while the weight fits to the piston of the control hydraulic cylinder.
From the point of view of simple construction and reliable protection of the supporting ladder against tripping off the spring-loaded guide it is advantageous for the side- and vertically movable guides of longitudinal branches of the ladder to be placed on holders pivoted on vertical axes and connected with the hydraulic cylinder piston, while the guiding groove in side-movable guides is covered with sprung latch leaning against the increased profile of guides and its front is below the level of dividers.
In consideration of placement of the transversal branches of the supporting ladder on the thrust face of the spring-loaded guide it is advantageous for the side-movable guides to be pulled above the level of dividers, while the stretching unit is below the end of the guiding groove in multiple of distances between transversal branches of the ladder.
So as to reliably divide the transversal branches of the supporting ladder it is advantageous for the divider to be sickle shaped, with a shaped groove on the outer edge. The upper side of the groove extends from the pointed end and it lifts up to the external edge in the height proportional to the height of the sun-blind lamellas deflection, continued by an adjacent guiding surface.
For easy handling of the supporting ladder being cut it is favourable for movable scissors to be placed oppositely, above the dividers.
It is favourable for the pneumatic cylinders of the sun-blind lamellas, dividers, scissors, stretching device and movable guides to be interconnected by power chains with the distribution box.
For easy servicing of the stacking unit it is advantageous for the unit to be adjustable by a driving chain, being engaged by a clutch interconnected by power chains with the distribution box.

List of Figures in Drawings

The technical solution will be explained in detail using the drawings that show in schemes the following: Fig. 1 shows the axonometric view of the stacking unit, Fig. 2 shows the axonometric view of one stacking unit in magnification, Fig. 3 shows the axonometric view of the stacking unit from the opposite side, Fig. 4 shows a detail of the supporting ladder guiding device and Fig. 5 shows a detail of the pressure clutch.

Sample Embodiment Description

The stacking unit according to Fig. 1 comprises the longitudinal beam 1 on one side placed on the box of drives 2 and on the other side adjusted for fixation to the machine for production of sun-blind lamellas. The longitudinal beam 1 houses the guide 3 for at least two stacking units 4. In this case, five stacking units 4 are used for long sun-blind lamellas - the units are re-adjustably placed on the guide 3 using the driving belt 5. They are engaged with the belt using the pressing clutch 6, for example the pneumatic pressing clutch according to Fig. 5.
All the stacking units 4 are made in the same way. Each stacking unit 4 according to Fig. 2 comprises the vertical tank 7, placed on the case 14, consisting of a pair of ledges 8. The bottom of the tank 7 consists of two opposite swivelling sprung snaps 10 placed on ledges 8. From the front side of the tank 7, from the side of intake of the sun-blind lamella, the case 14 of the stacking unit 4 houses the guiding chutes 11 for leading of the sun-blind lamella. From the rear side of the tank 7 there is placed at least one lifter 13. In this case there are used two lifters 13 with pneumatic drives 25, one of them serving for movement of sun-blind lamellas to the tank 7 and the other one serving for lifting the sun-blind lamellas in the tank 7 while cutting the supporting ladder 16. The lifting may be solved even by using one double-step pneumatic cylinder with different stroke in each step.
From the front part of the tank 7 there are - in mirror symmetry - placed two dividers 22 of transversal branches 23 of the supporting ladder 16 and from the inner side of their movement route there are the guides 18 of longitudinal branches 19 of the supporting ladder 16. Below the dividers 22, there is the stretching unit 15 of the supporting ladder 16. Above the dividers 22, there are - again in mirror symmetry - two scissors 27 for cutting longitudinal branches 19 of the supporting ladder 16.
The stretching unit 15 of the supporting ladder 16 is common for both of the dividers 22 and it includes the weight 150 pushed in the guide 17 fixed on the case 14. The weight 150 comprises - in mirror symmetry - the auxiliary guides 151 of longitudinal branches 19 of the supporting ladder 16. The auxiliary guides 151 are equipped with lockable stops 152. According to Fig. 4, both of the lockable stops 152 consist of angle levers 153 placed on auxiliary guides 151. In locked position, when the noses 154 of angle levers 153 fit on transversal branches 23 of the supporting ladder 16 and simultaneously prevent extension of longitudinal branches 19 of the supporting ladder 16 from auxiliary guides 151, the angle levers 153 are held by springs 155. Lockable stops 152 are unlocked by pins 157 placed in the guide 17 in a position on the route of free arms 156 of angle levers 153. The stretching unit 15 lifting is forced by the pneumatic drive 27, to which it fits with its own weight. So as to avoid twisting of the supporting ladder 16, the holder 33 placed below the stretching unit 15 comprises a guiding groove 333.
As it can be seen in 2 and 3, both dividers 22 are sickle shaped and they are put on arms 45 placed on shafts 34 of pneumatic drives 24. From the outer side, the dividers 22 comprise a shaped groove 35, that corresponds in its transversal profile with the shaped embodiment of side edges of sun-blind lamellas and it is round-curved. The upper wall 36 of the divider 22 above the shaped groove 35 extends from the tipped end 42 in an arch up to the arm 45 and simultaneously, it lifts from the inner edge proportionally to the height of the sun-blind deflection. The upper side 36 of the divider 22 continues with the slope 220 so as to limit the vibrations of the sun-blind lamella. The slope 220 is fixed on the arm 45 in case of both of the dividers 22.
Guides 18 of longitudinal branches 19 of the supporting ladder 16 are side-movable thanks to holders 31 pivoted on vertical axes 32. The guides 18 are equipped with pneumatic drives 28 to make the side movement. The profile of guides 18 is graduated and in the section below the dividers 22 the profile is enlarged. The sprung snatch 10 that is side-movable with guides 18 fits on it. The face 41 of the sprung stop 30 is below the level of dividers 22 and it makes the thrust face for divided transversal branches 23 of the supporting ladder 16. Simultaneously, the sprung snatch 10 covers the guiding groove 338 in the section of lowered profile of the guide 18, which is pulled through this part above the divider 22. The embodiment of the guiding groove 338 is well known of direct realisation. The end of the guide 18 above the dividers 22 serves as the thrust face for the cut end of the supporting ladder 16.
The cutting device consists of a pair of sliding scissors 270 with pneumatic drives 26. The scissors 270 have according to Fig.3 the shape of a fork 272 with the heating wire 271 or classically with jaws moving one against each other.
The supporting ladder 16 is placed in tanks 7 below the stacking units 4, their task being favourably fulfilled by the transport box 40.
All the above mentioned pneumatic drives 24, 25, 26, 27, 28 are connected by guides via flexible power chains 29 with central electromagnetic valves placed in the distribution box 44 and via them to not-shown source of pressure air. Matching of pneumatic drives 24, 25, 26, 27, 28 is controlled by the control unit of the machine for production of sun-blind lamellas.
Before leading the first stacked sun-blind lamella, the supporting ladder 16 according to Fig. 4 is guided for all the stacking units used for the given dimension to auxiliary guides 151 of the stretching unit 15 and guides 18 in such a way, so as the end of the supporting ladder 16 to be extended above them and the face 41 of the sprung latches 30 to match the lower of the transversal branches 23 of the supporting ladder 16, that are to be divided and one of the following transversal branches 23 to be hold by the nose 154 of lockable stops 152 on auxiliary guides 151 of the stretching unit 15, which is lifted above the matching pneumatic drive 27. Such an introduced supporting ladder 16 stretched by the weight of the stretching unit 15 is ready for stacking. When the superposed machine produces the first sun-blind lamella, the guides 18 swivel to sides using the pneumatic drives 27 and they side-stretch the supporting ladder 16, the tip 42 of dividers 22 driven by pneumatic drives 24 gets between the transversal branches 23 of supporting ladders 16 on individual supporting stacking units and they divide them. That allows penetration of a new sun-blind lamella the exact movement of which is routed by guiding slides 11 and auxiliary guiding areas 220, activities of which prevent even undesirable vibrations of the sun-blind lamella. When the sun-blind lamella is inserted between the transversal branches 23 of the guiding ladder 16, it returns by pneumatic drives 24 of the divider 22 back and simultaneously, it releases using the pneumatic drives 28 even the guides 18. That allows for the drives 13 to lift using the pneumatic drives 25 the sun-blind lamella between the ledges 8 above the sprung latches 10, that are tilted when the sun-blind lamella passes through and they return back after the passage of the sun-blind lamella. Simultaneously, when the sun-blind lamella is lifted, the transversal branches 23 move back even the sprung stops 30 at guides 18. In the course of sun-blind lamellas lifting, the pneumatic drive 27 lifts even the stretching unit 15, and after the introduction of free arms 156 to pins 157 there are unlocked the lockable stops 152, which allows vertical movement of the supporting ladder 16 in auxiliary guides 151. As soon as the sun-blind lamellas in the tanks 7 are extended above the sprung latches 10, the lifters 13 turn using the pneumatic drives 25 to the initial position and accordingly, the pneumatic drives 27 of the stretching units 15 return. As they move back, their own weight releases the free arm 156 and so there locks the lockable stop 152 and its nose 154 fits the following transversal branch 23 of the supporting ladder 16 and stretches it. Accordingly, the supporting ladder 16 fits the face 41 of the transversal branch 23 at the sprung stop 30. Consequently, the stacking device is ready for receipt of the following sun-blind lamella. The above described cycle repeats according to selected number of stacked sun-blind lamellas.
As soon as the last sun-blind lamella is inserted, the sun-blind lamellas are lifted by the other lifter 13 in the tank 7, approximately in 1,5 of the pitch of transversal branches 23 and pneumatic drives 26 are moved against each other and the cutting device burns or cuts - depending on the embodiment used - the supporting ladder 16. When the stretching unit 15 moves back as soon as the transversal branch 23 fits the face 41 of the sprung latch 30, the ladder remains in the guides 18 ready for further stacking.

Industrial Applicability

The device is designed for stacking of sun-blind lamellas beaded between double partitions of the supporting ladder.

Claims

Stacking unit of a machine for production of sun-blind lamellas, said stacking unit being re-adjustably placed on a longitudinal beam (1) of the machine and it comprises a vertical tank (7), which is provided with at least one lifter (13) of said sun-blind lamellas, a guiding chute (11), dividers (22) and guides (18) of a supporting ladder (16), characterised by the fact that said at least one lifter (13) of said sun-blind lamellas is placed on the rear side of the tank (7), while on the front side of the tank (7) there are placed the guiding chutes (11) of said sun-blind lamellas and in mirror symmetry said two dividers (22) of transversal branches (23) of the supporting ladder (16) with said guides (18) of longitudinal branches (19) of the supporting ladder (16) placed side-movably on vertical axes (32) and equipped with pneumatic drives (28), while below said dividers (22) there is placed a common stretching device (15) of the supporting ladder (16) for both of the said dividers (22).
Stacking unit according to claim 1, characterised by the fact that the stretching unit (15) comprises a weight (150) placed in vertical guide and the weight carries the auxiliary leads (151) of longitudinal branches (19) of the ladder (16), equipped with lockable stops (152), while the weight (150) fits to the piston of the control hydraulic cylinder.
Stacking unit according to claims 1 and 2, characterised by the fact that the side- and vertically movable guides (18) of longitudinal branches (19) of the ladder (16) are placed on holders (33), pivoted on vertical axes and connected with the hydraulic cylinder piston, while the guiding groove (333) in side-movable guides (18) is covered with sprung latch (10), leaning against the increased profile of guides (18) and its front is below the level of dividers (22).
Stacking unit according to claims 1 and 2 or 3, characterised by the fact that the side-movable guides (18) are pulled above the level of dividers (22), while the stretching unit (15) is below the end of the guiding groove (333) in multiple of distances between transversal branches (23) of the ladder (16).
Stacking unit according to claims 1 and 2 or 3, characterised by the fact that the divider (22), which is sickle shaped, with a shaped groove (35) on the outer edge, with the upper side of the groove extending from the pointed end (42) and lifting up to the external edge in the height proportional to the height of the sun-blind lamellas deflection, is continued by an adjacent guiding surface (220).
Stacking unit according to claims 1 up to 5 characterised by the fact that above the dividers (22) movable scissors (27) are oppositely placed.
Stacking unit according to claims 1 up to 6, characterised by the fact that pneumatic cylinders of the lifter (13) of sun-blind lamellas, dividers (22), scissors (27), stretching device (15) and movable guides (18) are inter-connected by power chains (29) with a distribution box (44).
Stacking unit according to claims 1 up to 7, characterised by the fact that it is re-adjustable using the driving chain (290), being engaged by a clutch (6) interconnected by a power chain (29) with the distribution box (44).