DE102009029888A1 - Stacking device for straight-edge stacking of steel plates, has stop movably arranged between receiving position for plate-like articles and end position in conveying direction, for braking plate-like articles - Google Patents

Abstract

The device (1) has a transport element (3) for conveying plate-like articles (2) in a conveying direction (F), and a stacking space (4) in which the plate-like articles are stacked. A stop (5) limits conveying movement of the plate-like articles in the conveying direction. The stop is movably arranged between a receiving position (6) for the plate-like articles and an end position (7) in the conveying direction, for braking the plate-like articles. A stop wall (10) limits the stacking space against the conveying direction. A control- or regulation unit (11) is connected with an actuator (9). An independent claim is also included for a method for operating a stacking device.

Description

The The invention relates to a stacking device for edge straight stacking of plate-shaped material, in particular of metal plates, comprising a transport element, the plate-shaped Promotes well in a promotion direction, and one Stacking room in which the plate-shaped material are stacked can, wherein to limit the conveying movement of the plate-shaped Guts in the conveying direction at least one stop available is. Furthermore, the invention relates to a method for operating a stacking device.

A stacking device of this kind is for example 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-PS 1 163 246 or the US 3,154,201 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 A1 , from the DE-PS 676 580 , from the DE-AS 1 115 677 , from the DE 19 19 220 A1 , from the DE-PS 1 029 292 , from the DE-PS 1 005 904 and from the DE-PS 1 002 247 known.

all It is common to previously known solutions that the stacking of the plate-shaped Guts done in a very simple manner can, however, that the stack quality is not always satisfactory is. Accordingly, the existing stackers are not sufficient if increased to the stack quality Requirements are made.

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

The Solution of this problem by the invention is in accordance with the device characterized in that the stop for the plate-shaped Good in conveying direction between a recording position for the plate-shaped Good and an end position movably arranged is.

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

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

Of the Stop can be arranged on a linear guide and moved on this by an actuator in the conveying direction become.

The Stacking device has according to a training Furthermore, a stop wall, the stacking space against the conveying direction limited.

Further a control and / or regulating unit is preferably provided, which is connected to the actuator and controls this. In this case is preferably provided that the stacking device further comprises a Sensor includes passing the plate-shaped material can detect in the conveying direction at a position and which is connected to the control and / or regulating unit. The sensor is preferably formed as a light barrier.

• a) Verbringen eines in Förderrichtung 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;
• b) Detektieren des Zeitpunkts des Passierens einer Position des in Förderrichtung vorderen Endes des plattenförmigen Guts mittels eines Sensors;
• 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;
• 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;
• e) Ablegen des plattenförmigen Guts in den Stapelraum.

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

• a) bringing a movable in the conveying direction 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;
• b) detecting the timing of passing a position of the front end of the plate-shaped material in the conveying direction by means of a sensor;
• 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;
• d) delaying the stop and thus the plate-shaped material in contact with it in such a way that the stop together with plate-shaped material comes to a standstill in the rear end position in the conveying direction for the plate-shaped material to be stacked;
• e) placing the plate-shaped Guts in the stacking space.

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

Of the Stop can be accelerated according to the above step c) be after a predetermined time after the according to step b) detected time has elapsed.

The maximum speed of the stop after accelerating according to the above step c) is preferably less than or at most equal to the entry velocity the plate-shaped Guts in the stacking device.

With The proposed approach makes it possible to use plates, which follow each other at a relatively close distance, precisely to stack.

With The proposed invention, it is possible, the stacking of To make plates in an improved controlled manner and so on to achieve a better stacking result. The device is preferred and the method used for stacking transversely divided Panels for salable parcels with optically straight edges in a cross-section system for heavy hot strip (with Thicknesses up to 25 mm).

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

It is an increased degree of automation of the stacking device possible. The speeds between a sledge scissors and the stacker can be optimized. Farther is an optimal gap formation between the individual Plates possible.

Advantageous it comes to a controlled braking of the panels before the ejection.

The Stacking tolerances can be significantly improved in this way become.

In The drawing is an embodiment of the invention shown. 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 space 4 to be moved. The stack room 4 is opposite to the conveying direction F by 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 slidably disposed in the conveying direction F, wherein 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 a front in the conveying direction F (adjustable) pickup position 6 and 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 conveyed in the conveying direction F 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 8th and the engine 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 awareness of the conveying speed in the conveying direction F and the time of passing the light barrier 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 5c 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 Optimizing the speeds also leads to an optimization the installed power of the drive motors on the roller tables and inside 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 ) on the current one Sync 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 dimension, the total weight of a package can be defined and can be dispensed with an additional parcel scale.

1

stacker

2

disc-shaped Well

3

transport element

3a

transport element

4

stacking space

5

attack

6

pickup position

7

end position

8th

linear guide

9

actuator (Engine)

10

abutment wall

11

Tax- and / or control unit

12

sensor (Photocell)

F

conveying direction

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0327854 B1 [0002]
• - DE 1163246 [0003]
• - US 3154201 [0003]
• DE 2201956 A1 [0004]
• - DE 676580 [0004]
• - DE 1115677 [0004]
• - DE 1919220 A1 [0004]
• - DE 1029292 [0004]
• - DE 1005904 [0004]
• - DE 1002247 [0004]

Claims (12)

Stacking device ( 1 ) for stacking plate-shaped material ( 2 ), in particular of metal plates, comprising a transport element ( 3 ), which the plate-shaped good ( 2 ) promotes 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 ), characterized in that the stop ( 5 ) in the conveying direction (F) between a receiving position ( 6 ) for the plate-shaped material ( 2 ) and an end position ( 7 ) is movably arranged to decelerate the plates. Stacking device according to claim 1, characterized in that that it is part of a production plant for metallic Plates, especially for steel plates, is. Stacking device according to claim 1 or 2, characterized in that the stop ( 5 ) on a linear guide ( 8th ) is arranged and on this by an actuator ( 9 ) in the conveying direction (F) can be moved. Stacking device according to one of claims 1 to 3, characterized in that it further comprises a stop wall ( 10 ) having the stack space ( 4 ) is limited against the conveying direction (F). Stacking device according to claim 3 or 4, characterized in that it further comprises a control and / or regulating unit ( 11 ) associated with the actuator ( 9 ) is connected and this controls. Stacking device according to claim 5, characterized in that it further comprises a sensor ( 12 ) passing through plate-like material ( 2 ) in the conveying direction (F) can detect at a position and with the control and / or regulating unit ( 11 ) connected is. Stacking device according to claim 6, characterized in that the sensor ( 12 ) is designed as a light barrier. Method for operating a stacking device ( 1 ) for stacking plate-shaped material ( 2 ), in particular of metal plates, comprising a transport element ( 3 ), which the plate-shaped good ( 2 ) promotes in a conveying direction (F), and a stacking space ( 4 ), in which the plate-shaped Good 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 ), characterized in that the method comprises the steps of: a) moving a stop movable in the conveying direction (F) ( 5 ) for the plate-shaped material ( 2 ) into a receiving position ( 6 ), the receiving position ( 6 ) in the conveying direction (F) in front of a rear end position ( 7 ) for the plate-shaped material to be stacked ( 2 ) lies; b) detecting the time of passing a position of the front end of the plate-shaped material in the conveying direction (F) by means of a sensor ( 12 ); c) accelerating the stop ( 5 ) in the conveying direction (F) as a function of the time detected in step b), wherein the start of the acceleration and its magnitude are selected such that the front end of the plate-shaped product (F) in the conveying direction (F) ( 2 ) the stop in front of the rear end position in the conveying direction (F) ( 7 ) for the plate-shaped material to be stacked ( 2 ) reached; d) delaying the attack ( 5 ) and the plate-like material in contact with it ( 2 ) in such a way that the attack ( 5 ) including plate-shaped material ( 2 ) in the conveying direction (F) rear end position ( 7 ) for the plate-shaped material to be stacked ( 2 ) comes to a standstill; e) depositing the plate-shaped product ( 2 ) in the stack space ( 4 ). Method according to claim 8, characterized in that that the acceleration according to step c) of claim 8 at least in sections, preferably completely, is constant. Method according to claim 8 or 9, characterized that the delay according to step d) of claim 8 at least in sections, preferably completely, is constant. Method according to one of claims 8 to 10, characterized in that the stop ( 5 ) is accelerated according to step c) of claim 8, after a predetermined time has elapsed after the detected according to step b) of claim 8 time. Method according to one of claims 8 to 11, characterized in that the maximum speed of the stop ( 5 ) after accelerating according to step c) of claim 8 is less than or equal to the entrance speed of the plate-shaped product ( 2 ) in the stacking device ( 1 ).