DE102009029888B4 - Stacking device for straight-edge stacking of plate-shaped material and method for their operation - Google Patents

Abstract

Stacking device (1) for stacking plate-shaped material (2), comprising a transport element (3) which conveys the plate-shaped material (2) in a conveying direction (F), and a stacking space (4) in which the plate-shaped material (2) can be stacked, wherein for limiting the conveying movement of the plate-shaped Guts (2) in the conveying direction (F) at least one stop (5) is present, wherein the stop (5) in the conveying direction (F) between a receiving position (6) for the plate-shaped Good (2) and an end position (7) is movably arranged for braking the plates, characterized in that the stop (5) on a linear guide (8) is arranged and on this by an actuator (9) in the conveying direction (F) to be moved can, with a control and / or regulating unit (11) is arranged, which is connected to the actuator (9) and controls it, and wherein a sensor (12) is arranged, the passage of plate-shaped Good (2) in the conveying direction (F) at a P osition and which is connected to the control and / or regulating unit (11).

Description

The invention relates to a stacking device for edge straight stacking of plate-shaped Good, in particular metal plates, comprising a transport element that promotes the plate-shaped Good in a conveying direction, and a stacking space in which the plate-shaped Good can be stacked, wherein the limitation of the conveying movement of the plate-shaped Guts at least one stop is provided in the conveying direction, wherein the stop is arranged in the conveying direction between a receiving position for the plate-shaped Good and an end position movable to decelerate the plates. Furthermore, the invention relates to a method for operating a stacking device.

A stacking device of this kind is from the EP 0 007 119 A1 known. Disclosed here is a device for the layered stacking of piece goods on a loading pallet.

A similar stacking device is from the EP 0 327 854 B1 known. In a strip casting plant, cast pre-strips are rolled in a hot strip rolling mill. In the end area of the plant, the rolled strip is divided into sheets by means of scissors. The panels are stacked at the end of the system. For this purpose, the individual panels run against a push before being dropped onto the forming stack.

To improve the stacking result, ie to arrange the individual panels as precisely as possible on top of each other, sees the DE 11 63 246 B or the US 3 154 201 A to slightly tilt the stacking area to the horizontal, so that the panels run against a stop due to gravity.

Similar solutions are from the DE 22 01 956 A , from the DE 676 580 A , from the DE 11 15 677 A , from the DE 19 19 220 A , from the DE 10 29 292 B , from the DE 10 05 904 B and from the DE 10 02 247 B known.

All previously known solutions, it is common that the stacking of the plate-shaped Guts can indeed be done in a very simple manner, that, however, the stack quality is not always satisfactory. Accordingly, the existing stacking devices are not sufficient if increased demands are placed on the stack quality.

The present invention is therefore based on the object to propose a stacking device for stacking plate-shaped Guts and a method for their operation, with or with which it is possible to substantially increase the stack quality in efficient operation, the device and the method for use in a plant for the production of metal plates, in particular of steel plates, to be suitable. This object is achieved with the features of the independent claims 1 and 5 solved.

The solution of this object by the invention is device-wise characterized in that the stop is arranged on a linear guide and can be moved on this by an actuator in the conveying direction, wherein a control and / or regulating unit is arranged, which is connected to the actuator and it controls, and wherein a sensor is arranged, which can detect the passage of plate-like material in the conveying direction at a position and which is connected to the control and / or regulating unit.

The solution according to the invention allows, in contrast to the prior art, a straight edge stacking of the plate-shaped material.

The stacking device is preferably part of a production plant for metallic plates, in particular for steel plates.

The stacking device according to a further development, a stop wall, which limits the stacking space against the conveying direction.

The sensor is preferably designed as a light barrier.

1. a) Verbringen eines in Förderrichtung durch einen Aktuator verfahrbaren Anschlags für das plattenförmige Gut in eine Aufnahmeposition, wobei die Aufnahmeposition in Förderrichtung vor einer hinteren Endposition für das zu stapelnde plattenförmige Gut liegt, wobei der Aktuator mit einer Steuer- und/oder Regeleinheit verbunden ist;
2. b) Detektieren des Zeitpunkts des Passierens einer Position des in Förderrichtung vorderen Endes des plattenförmigen Guts mittels eines Sensors, wobei der Sensor mit der Steuer- und/oder Regeleinheit verbunden ist;
3. c) Beschleunigen des Anschlags in Förderrichtung in Abhängigkeit des gemäß Schritt b) detektierten Zeitpunkts, wobei der Start der Beschleunigung sowie deren Größe so gewählt werden, dass das in Förderrichtung vordere Ende des plattenförmigen Guts den Anschlag vor der in Förderrichtung hinteren Endposition für das zu stapelnde plattenförmige Gut erreicht;
4. d) Verzögern des Anschlags und damit des mit ihm Kontakt habenden plattenförmigen Guts in der Weise, dass der Anschlag samt plattenförmigem Gut in der in Förderrichtung hinteren Endposition für das zu stapelnde plattenförmige Gut zum Stillstand kommt;
5. e) Ablegen des plattenförmigen Guts in den Stapelraum.

The method for operating a stacking device of the type mentioned is characterized by the steps:

1. a) bringing a movable in the conveying direction by an actuator stop for the plate-shaped Good in a receiving position, wherein the receiving position is in the conveying direction in front of a rear end position for the plate-shaped Good to be stacked, wherein the actuator is connected to a control and / or regulating unit;
2. b) detecting the time of passing a position of the front end of the plate-shaped material in the conveying direction by means of a sensor, wherein the sensor is connected to the control and / or regulating unit;
3. c) accelerating the stop in the conveying direction as a function of the time detected in step b), wherein the start of the acceleration and its size are chosen so that the front end in the conveying direction of the plate-shaped Guts the stop before the rear end position in the conveying direction for the stacked plate-shaped good achieved;
4. d) Delay the stop and thus the contact with him having plate-shaped Guts in the way that the stop along with plate-shaped material comes to a standstill in the rear end position in the conveying direction for the plate-shaped good to be stacked;
5. e) placing the plate-shaped Guts in the stacking space.

The acceleration according to said step c) is at least partially, preferably completely, constant. Accordingly, it is preferably provided that the delay according to the above step d) is at least partially, preferably completely, constant.

The stop can be accelerated according to the above step c) after a predetermined time has elapsed after the time detected in step b).

The maximum speed of the stop after the acceleration according to the above step c) is preferably less than or at most equal to the entrance speed of the plate-shaped product into the stacking device.

With the proposed approach, it is possible to precisely stack plates that follow each other at a relatively close distance.

The proposed invention makes it possible to make the stacking of plates in an improved controlled manner and thus to achieve a better stacking result. Preferably, the apparatus and method are used for stacking transversely divided sheets into ready-to-sell packages with optically straight edges in a cross-cut line for heavy duty hot strips (with thicknesses up to 25 mm).

It is possible to stack panels with tight stack or panel tolerances and thus produce stacked pacts with optically straight edges.

It is an increased degree of automation of the stacking device possible. The speeds between a carriage scissors and the stacker can be optimized. Furthermore, an optimal gap formation between the individual panels is possible.

Advantageously, there is a controlled braking of the panels before dropping.

The stacking tolerances can be significantly improved in this way.

In the drawing, an embodiment of the invention is shown.

• 1 schematisch die Seitenansicht einer Stapelvorrichtung während eines ersten Verfahrensschritts zu einem ersten Zeitpunkt,
• 2 die Vorrichtung gemäß 1 während eines zweiten Verfahrensschritts zu einem etwas späteren Zeitpunkt,
• 3 die Vorrichtung gemäß 1 während eines dritten Verfahrensschritts zu einem noch etwas späteren Zeitpunkt,
• 4 die Vorrichtung gemäß 1 während eines vierten Verfahrensschritts zu einem nochmals späteren Zeitpunkt,
• 5a qualitativ den Verlauf der Geschwindigkeit über der Zeit für eine zu stapelnde Platte,
• 5b qualitativ den Verlauf der Geschwindigkeit über der Zeit für einen die zu stapelnde Platte abbremsenden Anschlag,
• 5c qualitativ den Verlauf einer Schwenkbewegung von Tafel-Tragrollen und
• 5d qualitativ den Verlauf einer Abwurfbewegung für die zu stapelnde Platte.

Show it:

• 1 1 is a schematic side view of a stacking device during a first method step at a first time;
• 2 the device according to 1 during a second process step at a later date,
• 3 the device according to 1 during a third process step at a later date,
• 4 the device according to 1 during a fourth process step at a later date,
• 5a qualitatively the course of the speed over time for a plate to be stacked,
• 5b qualitatively the course of the speed over time for a stop which brakes the plate to be stacked,
• 5c qualitatively the course of a pivoting movement of panel support rollers and
• 5d qualitatively the course of a discharge movement for the plate to be stacked.

In the 1 to 4 are the conditions in a stacking device for four consecutive times 1 outlined for stacking plate-shaped good 2 is used. In the present case, it is a stacking device which is arranged at the end of a system on which steel plates are produced. The steel plates are at the end of the manufacturing process by means of a pair of scissors (not shown) divided into plates, which are then stacked as precisely as possible on each other.

The stacking device 1 has a transport element 3 and 3a on, with which the metal plates to be stacked 2 in a conveying direction F to a stacking room 4 to be moved. The stack room 4 will be against the direction of conveyance F through a stop wall 10 limited. The conveying movement of the plates 2 in the conveying direction F is in the illustrated stacking device 1 by means of a stop 5 controlled and by name slowed down.

For this purpose is the stop 5 (which is shown only very schematically) on a linear guide 8th in the conveying direction F slidably arranged, with an actuator (motor) 9 the movement of the stop 5 on the linear guide 8th affected. The actuator 9 In turn, stands with a control and / or control unit 11 in connection and is driven by this.

The control and / or regulating unit 11 still stands with a sensor 12 in the form of a light barrier in conjunction. The photocell 12 detected when a plate 2 a defined position in the entrance area of the stacking device 1 happened (with a dashed line in the 1 to 4 is marked).

Accordingly, the stop 5 between one in the conveying direction F front (adjustable) pickup position 6 and one in the conveying direction F rear (adjustable) end position 7 to be moved.

The recording position 6 or the end position 7 are in the 1 to 4 - If they are not shown in the position shown - indicated by dashed lines.

From the sequence of 1 to 4 The result is the following procedure for stacking the plates 2 :

The plates 2 arrive at the stacking device at a defined constant speed 1 ie they are from the transport element 3 in the conveying direction F promoted at a defined speed. This is in 1 to see. In this figure, it can be further seen that the stop 5 by means of the linear guide 8 and the motor 9 in a foremost recording position 6 was driven and is here in peace (waiting for the arrival of a plate 2 ).

The photocell 12 detects the passage of the plate 2 at the measuring point. The signal is sent to the control and / or regulating unit 11 directed. Due to the fact that the conveying speed is known in the conveying direction F and the time of passing the photocell 12 can be the control unit 11 the further movement and in particular position of the front end of the plate 2 to calculate.

Accordingly, the control and / or regulating unit controls 11 at a given time after passing the photocell 12 through the front end of the plate 2 the engine 9 and accelerates the attack 5 towards the rear end position 7 , This condition is in 2 outlined. At the same time, the time of the acceleration of the attack 5 as well as the size of the acceleration chosen so that the plate 2 the stop 5 caught up and contacted before the deceleration process is initiated. The final position 7 is reached after braking.

To the in 3 sketched time has the plate 2 the stop 5 reached. At this time may be with the deceleration of the stop 5 to be started, ie the stop 5 - and thus the plate 2 - is on the linear guide 8th and on the transport element 3a braked. The delay is chosen so that with constant deceleration in the end position 7 the transport element 3a and the stop 5 including plate 2 come to rest what is in 4 outlined.

The plate now in the final position 2 can now be dropped down on a recording, including not shown in detail table support rollers (transport element 3a ) are provided for the discharge of the plate 2 can be pivoted. This dropping operation is known as such.

Then the stop drives 5 in the in 1 sketched starting position (recording position 6 ) back.

The corresponding velocity-time curves are in 5 outlined.

5a shows the course of the speed of two plates 2 to their standstill.

In 5b is the speed history (always only the amounts shown) qualitative for the attack 5 shown.

The 5 c and 5d indicate the pivoting movement of table rolls ( 5c , always only the amounts shown) and the resulting ejection process of the plate 2 ( 5d ) at. This discarding of the plates is known as such, to which reference is made to the prior art.

The stop (plate stopper) 5 is thus first accelerated to a synchronous speed, then takes over the plate 2 and then delays it to a standstill. This process is repeated for each plate 2 ,

There is a controlled disk ejection after reaching the standstill of the plate. The final position 7 is equal to the stacking position.

The stop 5 may be provided with additional damping elements and / or a Schwenkbewegungsmöglichkeit to one on the plane in 1 to 4 have perpendicular axis to the impact of the plate 2 to dampen.

The optimization of the speeds also leads to an optimization of the installed power of the drive motors on the roller tables and within the truck.

The described procedure also allows the gaps between the panels to be optimized. These always cover the complete time required for slowing down, shedding and stacking the plates 2 in the forklift. As a result, a collision between the disc ejection system and the disk itself is prevented, thus avoiding resulting malfunctions in the stacking system.

The stop (board stopper) 5 So it will be before the arrival of the record 2 from his waiting position (recording position 6 ) to the current synchronous speed with the incoming disk 2 accelerated. Before the start, ie before the acceleration of the stop 5 will be between the plate 2 and the stop 5 formed a gap. The plate gets to the end of the acceleration 2 the stop 5 one and both move in sync (for a while) until the stop is delayed 5 and thus also the plate 2 by the control and / or regulating unit 11 is initiated.

The dropping of the plate 2 to the stacking position is with the standstill of the plate 2 initiated.

Because the discard of the plate 2 Controlled until the plate is stopped, on the one hand, an uncontrolled impact of the plate 2 eliminated and on the other hand, the plate 2 fall correctly into the intended stacking position. Thus, the stack quality (stacking tolerances) compared to the previously known solutions is significantly improved.

The plates 2 are transported within the stacking device on driven and at the same time also pivotable rollers. The drive of these rollers is able to drive both constantly with the table rollers in front of the stacking device as well as to delay synchronously with the drive of the stop.

The photocell 12 can also be used to realize a Zählwerkfunktion which with known plate dimensions, the total weight of a package can be defined and can be dispensed with an additional parcel scale.

LIST OF REFERENCE NUMBERS

1

stacker

2

plate-shaped material

3

transport element

3a

transport element

4

stacking space

5

attack

6

pickup position

7

end position

8th

linear guide

9

Actuator (motor)

10

abutment wall

11

Control and / or regulating unit

12

Sensor (photocell)

F

conveying direction

Claims (9)

Stacking device (1) for stacking plate-shaped material (2), comprising a transport element (3) which conveys the plate-shaped material (2) in a conveying direction (F), and a stacking space (4) in which the plate-shaped material (2) can be stacked, wherein for limiting the conveying movement of the plate-shaped Guts (2) in the conveying direction (F) at least one stop (5) is present, wherein the stop (5) in the conveying direction (F) between a receiving position (6) for the plate-shaped Good (2) and an end position (7) is movably arranged for braking the plates, characterized in that the stop (5) on a linear guide (8) is arranged and on this by an actuator (9) in the conveying direction (F) to be moved can, with a control and / or regulating unit (11) is arranged, which is connected to the actuator (9) and controls it, and wherein a sensor (12) is arranged, the passage of plate-shaped Good (2) in the conveying direction (F) on one Detect position and which is connected to the control and / or regulating unit (11). Stacking device after Claim 1 , characterized in that it is part of a production plant for metallic plates, in particular for steel plates. Stacking device after Claim 1 or 2 , characterized in that it further comprises a stop wall (10) which limits the stacking space (4) against the conveying direction (F). Stacking device according to one of Claims 1 to 3 , characterized in that the sensor (12) is designed as a light barrier. A method for operating a stacking device (1) for stacking plate-shaped material (2), comprising a transport element (3), which conveys the plate-shaped Good (2) in a conveying direction (F), and a stacking space (4) in which the plate-shaped Can be stacked well, wherein for limiting the conveying movement of the plate-shaped Guts (2) in the conveying direction (F) at least one stop (5) is present, characterized in that the method comprises the steps of: a) Spend one in the conveying direction (F) an actuator (9) movable stop (5) for the plate-shaped Good (2) in a receiving position (6), wherein the receiving position (6) in the conveying direction (F) in front of a rear end position (7) for the plate-shaped Good to be stacked (2 ), wherein the actuator (9) with a control and / or regulating unit (11) is connected; b) detecting the time of passing a position of the front in the conveying direction (F) of the plate-shaped Guts by means of a sensor (12), wherein the sensor (12) is connected to the control and / or regulating unit (11); c) accelerating the abutment (5) in the conveying direction (F) as a function of the time detected in step b), the start of the acceleration and its magnitude being selected so that the front end of the plate-shaped material (2) in the conveying direction (F) reaches the stop in front of the rear end position (7) in the conveying direction (F) for the plate-shaped material (2) to be stacked; d) delaying the stopper (5) and having him in contact with plate-like Guts (2) in such a way that the stop (5) together with plate-shaped Good (2) in the conveying direction (F) rear end position (7) for stacking plate-shaped Good (2) comes to a standstill; e) placing the plate-shaped Guts (2) in the stacking space (4). Method according to Claim 5 , characterized in that the acceleration according to step c) of Claim 5 at least in sections, preferably completely, is constant. Method according to Claim 5 or 6 , characterized in that the delay according to step d) of Claim 5 at least in sections, preferably completely, is constant. Method according to one of Claims 5 to 7 , characterized in that the stop (5) according to step c) of Claim 5 is accelerated after a predetermined time after the according to step b) of Claim 5 detected time has elapsed. Method according to one of Claims 5 to 8th , characterized in that the maximum speed of the stop (5) after accelerating according to step c) of Claim 5 is less than or equal to the entry speed of the plate-shaped Guts (2) in the stacking device (1).

Images