EP0768261A1 - Device and method for continuous zig-zag folding and stacking of web-shaped goods - Google Patents

Abstract

The auxiliary laying unit (5) has at least one recess (15) extending from the sliding end side (S) in the sliding in direction (R). The fabric is cut between the laying table (2) and the auxiliary laying unit, and the full stack is cleared away, or a new laying table is brought into place. The surface of the laying table is formed by a number of carriers which project upwards, and the auxiliary unit has matching recesses. The laying table is raised or the auxiliary unit is lowered for the projections on the laying table to fit into the recesses of the auxiliary unit from below, to raise the laid fabric from the auxiliary unit which can then be withdrawn. The auxiliary laying unit has an underlay (8) of cardboard.

Description

The invention relates to a device for the continuous destacking of web-like goods according to the preamble of claim 1 and a method for the continuous destacking of web-like goods according to the preamble of claim 10.

In the case of machines for processing or finishing web-shaped goods, for example textile machines, the goods are often cut off after processing. Destacking means the layered and zigzag-shaped depositing of web-like goods on grates, pallets or transport trolleys. In general, the goods are passed through a reciprocating table arm, which places the goods in a zigzag shape on the support.

A slidable or mobile table table, for example in the form of a carriage, is generally used as the base. As soon as the stack of sheet-like goods reaches the desired height, the underlay is removed, the stacked goods are unloaded and the empty table table is positioned again under the stacker. However, the known arrangements all have the disadvantage that the machine upstream of the scraper must be stopped during the unloading process of the stacked goods. Due to the constant interruptions, the productivity of the machine upstream of the scraper is severely impaired. On the one hand, the machine is not in use for a relatively long period of time, on the other hand, frequent stopping complicates the design of the machine and shortens its service life.

A device for folding and cutting paper webs is known from US Pat. No. 4,908,010, in which the subsequent paper web is paneled onto the knife during the cutting process, as a result of which the device can be operated continuously. Problems arise in particular when used with textiles if the cutting knife tears parts of the fabric out of the stack when it is pulled back. The transfer of the stack from the knife to the support table can be complicated in such devices.

From EP 116 100 a device for packaging flat material is also known. A material web is cut through by a knife, a temporary support surface being pushed under the material web at the same time as the knife so that the work process does not have to be interrupted. Problems also arise with this device when the deposited goods are placed on the table table from the temporary base.

The aim of the invention is to avoid the disadvantages of the known, in particular to provide a device for the continuous destacking of web-like goods, which eliminates the need to stop the machine upstream of the destacker and which enables reliable destacking.

Another object of the invention is to provide a method for the continuous destacking of web-like goods, which allows destacking without stopping the machine upstream of the destacker and which enables a uniform destacking.

According to the invention, these objects are achieved with a device and a method with the features of the independent claims.

The device according to the invention for stacking web-shaped Goods consist of a table table and a table arm arranged above it and have additional auxiliary storage means for continuous stacking.

The auxiliary storage means can be inserted in an insertion direction between the table arm and the table table and are provided with an insertion end face. The insertion end is understood to mean that part of the auxiliary storage means which is first inserted between the table arm and the table table.

The auxiliary storage means are provided with at least one recess which extends in the direction of insertion from the insertion end. Thanks to these recesses, the contact area between the auxiliary storage means and the stacked goods can be reduced. In a particularly advantageous embodiment, the auxiliary storage means consist of a rake. In this case, the recesses are formed by the spaces between the individual bars of the rake. However, it is also conceivable to use flat auxiliary storage means which have only one or two cutouts which extend in the insertion direction.

Such arrangements are particularly advantageous if the table table is also provided with upwardly directed support elements which are complementary to the recesses in the auxiliary storage means so that they can penetrate them. Before the stacked goods are transferred from the auxiliary storage means to the table table, the table table can be raised (or the auxiliary storage means lowered) so that the carrier elements penetrate the cutouts of the auxiliary storage means and support the stacked goods. The auxiliary storage means can then simply be pulled out between the stack of goods and the table, since they are no longer in direct contact with the web. It is for the functioning of the inventive Device the number and shape of the recesses of minor importance. It is essential that the cutouts extend from the insertion end of the auxiliary storage means in the insertion direction.

The carrier elements of a particularly advantageous table table are also movably arranged. The carrier elements can be designed, for example, in the form of circumferential bands. These belts can be moved to unload the table so that the stack of goods can be brought from the table to a storage position next to it. In such cases, the carrier elements perform a function both when the stack of goods is taken over from the auxiliary storage means and when the goods are handed over for further processing, for example for packaging or transport.

The sheet-like goods are guided through the pendulum-like movable table arm onto the table table. Due to the pendulum movement of the table arm, the sheet-like goods are stacked on the table table in layers, zigzag-like. Before the stack of sheet-like goods is removed from the table table, the auxiliary storage means are inserted between the stack of goods and the table arm. The auxiliary storage means take over the function of the table table for a certain time. The table with the stack of goods can therefore be removed and unloaded from the stacker without having to interrupt the destacking process. When the table has been emptied, it can be repositioned directly below the auxiliary storage means and the new stack of goods placed on the auxiliary storage means can be transferred to the table.

In a preferred exemplary embodiment, the stacking device also has a cutting device with which the stacked goods are unloaded before the table is unloaded can be separated from the next lane.

A particularly advantageous exemplary embodiment results if the table table and / or the auxiliary storage means are arranged such that they can be adjusted in height. It can thereby be achieved that the surface of the stacked goods is always kept at the same height in relation to the table arm. Both the table table and the auxiliary depositing means are advantageously moved down during the destacking.

In a particularly preferred embodiment, the boarding device also has a feed unit for covering the auxiliary storage means with a flat base. The auxiliary storage means, in particular a rake, are covered with a flat surface by the feed device. The underlay can preferably consist of cardboard. A carton can also be placed on the top of the stacked goods with the feed unit. This is preferably done shortly after the auxiliary storage means have taken over the function of the table table.

A particularly advantageous exemplary embodiment results if the table table is arranged to be displaceable from a table position into an unloading position.

The method according to the invention for the continuous destacking of web-like goods is characterized in that the board table is replaced by auxiliary storage means during the unloading of the boarded goods. In a first step, web-shaped goods are usually placed on a table table. When the stack of stacked goods has reached the desired height, the auxiliary storage means take over the function of the table table. The table with the stacked goods can be removed from the stacker without having to interrupt the destacking process and the machine upstream of the stacker must therefore be switched off. During unloading of the table table, the goods are placed on the auxiliary storage means. After unloading the goods, the table table is returned to its original position and takes over the stack that was stacked on the auxiliary storage means. In this way, a continuous stacking cycle is created, which eliminates the need to stop the upstream machine.

The auxiliary storage means have cutouts which extend from the insertion end in the insertion direction. The auxiliary storage means also have at least one support element projecting upwards. To transfer the stack of goods placed on the auxiliary storage means, the table table is raised and / or the auxiliary storage means is lowered, so that the support elements of the table table penetrate the cutouts of the auxiliary storage means from below and lift the goods placed on the auxiliary storage means. The auxiliary storage means are relieved of the stored goods and can simply be pulled out laterally between the carrier elements.

In a preferred method, the stacked goods are separated from the subsequent web shortly before the table table is replaced in its function by the auxiliary storage means. A single stack is always initially stacked on the auxiliary storage means and subsequently handed over to the table.

A particularly advantageous exemplary embodiment of the method results if the table table is lowered during the destacking, so that the top level of the stack of de-clad goods is kept at a constant height. With such a method, a particularly regular layering of the web-like goods is achieved due to the constant distance between the table arm and the stack. If the table is lowered during destacking, it is advantageous to lower the auxiliary storage means during the destacking. The auxiliary storage means are located before they take over the function of the table slightly above the upper surface of the stack of goods lying on the table. After taking over the function of the table table, the auxiliary storage means are also lowered in such a way that the upper level of the stack placed on them remains at a constant height. After emptying, the table table is positioned in such a way that it comes to rest in the auxiliary storage means from below. The transfer of the stacked stack from the auxiliary storage means to the table is particularly easy.

A particularly simple unloading of the table table is obtained if the table table can be moved from a table position to an unloading position for unloading the stacked goods.

In a particularly simple method according to the invention, the auxiliary storage means are inserted between the table arm and the upper level of the stack on the table table before the table table is unloaded.

In a preferred exemplary embodiment, the auxiliary storage means are covered with a flat, stable base before they take over the function of the table table. The web-shaped goods are therefore not stacked directly on the auxiliary storage means, but on a support lying thereon. The stacked goods remain on the fixed documents during the transfer to the table table and the unloading process from the table table. The use of such a solid support ensures that the bottom layer of the stacked goods remains flat even when the auxiliary storage means are pulled out from under the stack. The solid base plate offers protection against wrinkles, crumpling or tearing, but also against dirt through the auxiliary filing means.

Figur 1

eine schematische Darstellung einer erfindungsgemässen Vorrichtung zu Beginn des Abtafelvorgangs,

Figur 2

eine schematische Darstellung einer erfindungsgemässen Vorrichtung beim Abtafeln auf die Hilfsablage-Mittel,

Figur 3

eine schematische Darstellung des Entladevorgangs vom Tafeltisch,

Figur 4

eine schematische Darstellung der Vorrichtung kurz vor der Übergabe des Warenstapels von den Hilfsablage-Mitteln an den Tafeltisch,

Figur 5

eine schematische Darstellung der erfindungsgemässen Vorrichtung beim normalen Tafelvorgang,

Figuren 6a bis 6c

Draufsichten auf verschiedene Ausführungsbeispiele von erfindungsgemässen Hilfsablage-Mitteln,

Figur 7

eine schematische Darstellung von Tafeltisch und Hilfsablage-Mitteln eines besonders bevorzugten Ausführungsbeispiels,

Figur 8a bis 8c

schematische Darstellungen eines Tafeltisches, eines weiteren Ausführungsbeispiels, und

Figur 9

eine Frontansicht einer erfindungsgemässen Vorrichtung.

The invention is explained in more detail below on the basis of exemplary embodiments and on the basis of the drawings. Show it:

Figure 1

2 shows a schematic representation of a device according to the invention at the beginning of the destacking process,

Figure 2

2 shows a schematic representation of a device according to the invention when stacking on the auxiliary storage means,

Figure 3

1 shows a schematic illustration of the unloading process from the table table,

Figure 4

1 shows a schematic representation of the device shortly before the stack of goods is transferred from the auxiliary storage means to the table table,

Figure 5

2 shows a schematic representation of the device according to the invention in the normal table process,

Figures 6a to 6c

Top views of various exemplary embodiments of auxiliary storage means according to the invention,

Figure 7

2 shows a schematic illustration of table table and auxiliary storage means of a particularly preferred exemplary embodiment,

Figure 8a to 8c

schematic representations of a table, a further embodiment, and

Figure 9

a front view of an inventive device.

FIG. 1 shows a device 1 for stacking sheet-like goods on a table table 2. The device 1 has a pendulum-like, swingable table arm 3 for depositing the sheet-like goods in zigzag-shaped layers on the table table 2. The zigzag-shaped stored goods form a stack of goods 4. The device 1 also has a cutting device 6 for separating the stack of goods 4 from the subsequent web-shaped goods and auxiliary storage means 5. The auxiliary storage means 5 are horizontally displaceably attached to a height-adjustable bracket 10. The auxiliary storage means also have cutouts 15 (only indicated schematically in FIGS. 1 to 5), which extend from the insertion face S of the auxiliary storage means 5 in the insertion direction R.

The table table 2 is also arranged to be adjustable in height. The auxiliary storage means 5 can be inserted horizontally between the upper level of the stack of goods 4 and the table arm 3. The device 1 also has a feed device 11 for covering the auxiliary storage means 5 with flat, stable documents 8.

FIG. 1 represents the initial step of a table cycle. Here, a table cycle is understood to mean the placing of a stack of goods 4 on the table table 2 with subsequent emptying of the table table 2.

The sheet-like goods are placed with the table arm 3 in a zigzag shape on the table table 2, while the table table 2 is lowered. The lowering speed is selected so that the upper level of the stack of goods 4 placed in relation to the table arm 3 remains at a constant height. The auxiliary storage means are supplied with a feed device with stable, flat documents 8 documented.

FIG. 2 shows the device from FIG. 1 shortly after the height H of the stack 4 deposited on the table table 2 has reached a desired value. The auxiliary storage means 5 are inserted horizontally between the stack of goods 4 and the table arm 3 shortly after the stack of goods 4 has been separated from the subsequent web by a cutting device 6. The subsequent web of material is now placed in a further stack of goods 4 'on the auxiliary storage means 5 or on the base 8 lying thereon. The height-adjustable holder 10, to which the auxiliary storage means 5 are attached, is lowered in such a way that the upper level 13 'of the stack of goods 4' placed on the auxiliary storage means 5 'remains at a constant height with respect to the table arm 3. The table table 2 is moved with the goods stack 4 from a table position T into an unloading position E (see FIG. 3). To move from the panel position T into the unloading position E, the panel table 2 can be mounted on a trolley 12. However, it is also conceivable to attach the table table 2 on rails or on a conveyor belt. The upper level 13 of the stack of goods 4 can be covered with a flat support 8 'made of cardboard after the auxiliary storage means 5 take over the function of the table table. The stack of goods is limited on both sides.

FIG. 3 shows schematically how the stack of goods 4 together with the base 8 is removed from the stacking table 2, while the next stack of goods 4 'is placed on the auxiliary storage means 5. The table table 2 is moved back to its original position.

Figure 4 shows how the table 2 is positioned directly in the auxiliary storage means 5. The storage means 5 are pulled out from under the base 8, as a result of which the stack of goods 4 ′ together with the base 8 forms the table table 2 is handed over. The auxiliary storage means 5 are moved back to their original position and the web-like goods are placed on the table table 2. The auxiliary storage means 5 are again brought into a position with the height-adjustable holder 10 which corresponds to that of FIG. 1.

A table cycle is completed with FIG. 5 and another cycle according to FIG. 1 follows.

Because the auxiliary storage means 5 take over its function during the unloading of the table table 2, non-stop stacking is possible.

FIG. 6a shows a top view of auxiliary storage means 5 according to the invention, which are designed as rakes 7. Between the individual bars of the rake there are spaces 15 through which support elements 16 (see FIG. 7) of a table table 2 can be inserted and raised from below. The cutouts 15 extend from the end face S of the auxiliary storage means 5 in the insertion direction R.

FIG. 6b shows a modified exemplary embodiment of auxiliary storage means according to the invention. The auxiliary storage means 5 are designed as a plate 22 which has cutouts 15. The cutouts 15 extend from the end face S of the plate 22 in the insertion direction R.

FIG. 6c shows a plate 22 with a cutout 15. In principle, any number of cutouts is possible. In order to ensure the best possible weight distribution of the stored goods on the auxiliary depositing means 5 and a uniform transfer of the goods from the auxiliary depositing means to the table table, a larger number of cutouts is recommended, for example five to ten.

Figure 7 shows schematically a table table 2 with inventive Auxiliary storage means 5 in the form of a rake 7. For reasons of clarity, the stack of goods stored on the rake 7 is not shown. The rake 7 has cutouts 15 which extend from its end face S in the insertion direction R. The table table 2 has carrier elements 16 which protrude from its surface. The carrier elements 16 form a support surface 19 for the stored goods. When the stack of goods is transferred from the auxiliary storage means 5 to the table table 2, the table table 2 is raised and / or the auxiliary storage means 5 is lowered, so that the support elements 16 of the table table 2 penetrate the spaces 15 of the auxiliary storage means 5. The carrier elements 16 raise the web of material deposited on the auxiliary storage means 5, so that the web of material rests on the bearing surface 19. Thereafter, the rake 7 relieved of the stack of goods can be pulled out laterally between the carrier elements 16. Of course, this exemplary embodiment can also be used particularly advantageously in connection with a base 8. In this case, the stack of goods is not lifted directly but the support from the carrier elements 16.

FIGS. 8a to 8c show a further exemplary embodiment, in which the carrier elements 16 consist of two bands movably mounted on rollers. Similar to FIG. 7, a stack of stacked goods 4 is transferred from the rake 7 to the support surface 19 formed by the carrier elements 16. The bearing surface 19 is essentially formed by the band 18. The particular advantage of this arrangement is that the stack of goods 4 (possibly on a base 8, which was placed on the auxiliary storage means 5 before the boarding process) is simply removed from the board table 2. It is sufficient to move the belt 18 forming the bearing surface 19 in such a way that the stack of goods 4 is pushed laterally from the table table. It is conceivable, for example, to stack the goods 4 at a packaging station, in a warehouse or on to hand over a means of transport.

FIG. 9 schematically shows the front view of the exemplary embodiment from FIG. 7 when the stack of goods 4 is transferred from the rake 7 to the table table 2. The carrier elements 16 of the table table 2 are arranged in such a way that they penetrate the cutouts 15 between the individual arms of the rake 7. The stack of goods 4 is lifted by the carrier elements 16 and lies on the support surface formed by the carrier elements 16. The rake 7 is thus relieved and can simply be pulled out between the table table 2 and the stack of goods 4 (or, if applicable, the support 8). Such a base 8 is also shown schematically in FIG. However, the base 8 is not essential for the correct functioning of the device or the method according to the invention.

Claims (15)

Device (1) for destacking web-shaped textile goods, with a table table (2) and a table arm (3), characterized in that between the table arm (3) and the table table (2) an auxiliary shelf which can be inserted in one insertion direction and is provided with an insertion end face -Means (5) are provided on which the goods can be deposited, the auxiliary storage means (5) being provided with at least one recess (15) which extends from the insertion end face (S) in the insertion direction (R). Device according to claim 1, characterized in that the auxiliary storage means (5) have a horizontally displaceable rake (7). Device according to one of claims 1 or 2, characterized in that the table table (2) and / or the auxiliary storage means (5) are provided with a device for height adjustment. Apparatus according to claim 3, characterized in that the table table (2) is provided with at least one upwardly directed support element (16) which forms a support surface (19) for the goods and which is complementary to the recesses (15) of the auxiliary storage device. Means (5) is designed so that it can penetrate them in order to lift the goods lying on the auxiliary storage means (5) and to relieve the auxiliary storage means. Device according to one of claims 1 to 4, characterized in that the device (1) has a feed device (11) for covering the auxiliary storage means (5) with a flat base (8). Device according to one of claims 1 to 5, characterized in that the device (1) has means (16, 18) for removing the de-packed goods from the table table (2). Apparatus according to claim 6, characterized in that the means (16, 18) for removing the goods are formed by the carrier elements (18). Device according to one of claims 4 to 7, characterized in that the carrier elements are designed as movable bands (18). Device according to one of claims 1 to 8, characterized in that the table table (2) is displaceable from a table position (T) into an unloading position (E). Method for the continuous destacking of web-shaped, textile goods on a support surface (19) of a table table (2) by means of a table arm (3), characterized in that, for unloading the goods placed on the table table, auxiliary depositing means (5) between the table arm (3 ) and the table (2), on which the goods are placed during unloading, that the goods are separated between the table and the auxiliary storage means (5) and then the table (2) is removed and unloaded or replaced by an empty table, wherein the support surface (19) of the table table (2) is formed by a number of upwardly projecting support elements (16) and the auxiliary storage means are provided with complementary recesses (15), so that the support surface (19 ) of the table table and / or the auxiliary storage means lowered in this way that the support elements (16) penetrate the recesses (15) from below and lift the deposited goods, the auxiliary storage means being relieved of the stored goods, and then the relieved auxiliary storage means being pulled out laterally between the support element. A method according to claim 10, characterized in that the table table is lowered to a stack (4) during the laying down of the web-like goods in such a way that the upper level 13 of the goods stack (4) is kept at a constant height with respect to the table arm (3). Method according to one of claims 10 or 11, characterized in that the auxiliary storage means (5) are lowered during the stacking in such a way that the upper level (13 ') of the stack (4') deposited on the auxiliary storage means (5) remains at a constant height in relation to the table arm (3). Method according to one of Claims 10 to 12, characterized in that the auxiliary storage means (5) are covered with a flat base (8) before being inserted between the upper level (13) of the stack (4) and the table arm (3) , The support (8) remaining between the stack of goods (4; 4 ') and the table table (2) when the auxiliary storage means (5) is removed. A method according to claim 13, characterized in that the auxiliary storage means (5) are covered with a base (8) made of cardboard. Method according to one of claims 11 to 14, characterized in that the upper level (13) of the stack (4) after inserting the auxiliary storage means (5) is covered with a flat support (8 ') made of cardboard.

Images