EP3294654B1 - Apparatus and method for transporting sheets - Google Patents

Description

The invention relates to a device for transporting foils according to the preamble of claim 1 and a method for transporting foils according to the preamble of claim 9.

Devices and methods for transporting films from a stack to a laying area are known, in particular in connection with the lamination of material plates with this film in a laminating press. Films in this context mean flat paper, laminating material or the like which is suitable for being applied to a carrier material. The support material may in this case also be a film or other similar thin materials or rigid materials such. B. material plates.

In the course of this, for an automated device, like out DE 203 20 325 U1 is known, a film stack provided on a pallet, of which is pre-separated with a first squeegee, the top sheet on the side opposite to the transport direction. Subsequently, the film is then picked up by a second movable squeegee on the opposite side (in the transport direction) and removed from the stack and transported in the transport direction to a laying area. Once there, the film is deposited on a substrate, preferably a carrier plates. In this disclosure, an intermediate table is provided which bridges the area between the film stack and the lay-up, so that the film can be transported without damage, even at lower speeds. Next discloses the DE19839923 A1 a device according to the preamble of claim 1, and a method according to the preamble of claim 9.

Although appropriate to the requirements at that time, today's applications require processes and devices which are flexible enough to respond to different levels of stiffness of the films and are also capable of high speeds To separate stacks and place the films safely and accurately in the laying area.

In particular, it has proved to be disadvantageous in the prior art that the film is isolated on one side, but on the other hand, when receiving the film, the film is pressed onto the film stack at the beginning of the recording process. It is also disadvantageous that the air is directed to underblowing in the direction of the laying area and thus leads to contamination of the laying area or of the substrates lying there.

The invention has for its object to provide an apparatus and a method with which it is possible to respond to different types of films and to allow the fastest possible timing, which allow the properties of the film. In particular, the previous disadvantages are to be improved and improved film drawing made possible.

• einen Lagerplatz zur Aufnahme eines Folienstapels aus einer Vielzahl an Folien,
• eine Legeplatz zur Ablage einer Folie von dem Folienstapel,
• eine erste Saugleiste mit einem Antrieb zum Anheben einer Folie vom Folienstapel mittels Saugern und
• eine zweite Saugleiste mit einem Antrieb zum Transport einer Folie in Transportrichtung zum Legeplatz,
• Sauger zur Fixierung der Folie an den Saugleisten und
• ein Zwischentisch zwischen Lagerplatz und Legeplatz, wobei
• die erste Saugleiste geeignet ist die Folie im Wesentlichen in einem vorgegebenen Bereich an der in Transportrichtung weisenden Kante vom Folienstapel abzuheben. Die Lösung der Aufgabe für die Vorrichtung wird dadurch erreicht, dass
• der Zwischentisch mit einem Antrieb geeignet ist die angehobene Folie zumindest im Bereich zu unterfahren,
• die zweite Saugleiste geeignet ist die Folie im Wesentlichen in diesem Bereich aufzunehmen, zum Legeplatz zu transportieren und dort abzulegen.

The device for transporting foils comprises:

• a storage space for receiving a film stack of a plurality of films,
• a place to lay a film from the film stack,
• a first squeegee with a drive for lifting a film from the film stack using suction cups and
• a second squeegee with a drive for transporting a film in the direction of transport to the place of laying,
• Sucker for fixing the film to the squeegee and
• an intermediate table between storage area and laying place, whereby
• the first squeegee is suitable for lifting the film from the film stack substantially in a predetermined area on the edge pointing in the direction of transport. The solution of the problem for the device is achieved in that
• the intermediate table with a drive is suitable for the raised foil at least in the area to drive under
• the second squeegee is suitable to receive the film substantially in this area, to transport to the site and store there.

The device is now suitable for lifting and transporting the films in different ways, in particular gently for the films but at the same time at a fast cycle rate. During the positioning and storage of the first film with a second squeegee, the next film is lifted from the first squeegee from the film stack and a third foil possibly attached to the second film is given the opportunity to separate from the second film. This can be done with the support of vibrations or by blowing on the edges. If it is ensured, usually through the passage of time, that no further film adheres to the second film, it can be underblown, so that it does not displace the next film from the film stack when the transport is started by the second squeegee.

In particular, compared with the prior art, the present invention offers the following advantages:
The film is lifted on the side on which it is also taken. The raised foil receives no more contact with the film stack after lifting, but is placed on demand on the sliding intermediate table and handed over there. There is thus no risk of renewed adhesive contact between the film and the film stack.

The direction of the air flow for underblowing the film is arranged in an advantageous manner facing away from the Legetisch. No pollution is distributed in this direction.

The direction of the air flow against the transport direction of the film can be used to establish an air cushion at the beginning of the transport, which serves for a gentle transport and at the same time for cleaning the bottom of the film.

In a preferred embodiment, it is no longer blown from the outside onto the separating gap between the film and the film stack, which has sometimes led to the film stack uncontrollably fanning out. But by the retraction of the blow bar and / or through the air line of the blown air through the intermediate table is an optimal use of the blowing air to separate the film from the film stack. By the improved utilization of the blown air this can be reduced compared to conventional methods and devices.

Furthermore, an adaptation of the device to different film sizes is no longer necessary because it is lifted on the side of the film on which the second suction strip engages and the film stack can be centered there. Thus, the structure of the device can be made simpler overall, since the pointing in the direction of transport side of the film stack is always placed at the same position.

Advantageously, a variety of possible variants of the transport process are now necessary, which can be selected depending on the time available and the material properties of the film.

Advantageously, the first squeegee can only lift and hold the foil until the second squeegee comes back from depositing the previous foil on the lay. In a kind of flying change, the second squeegee can take over the film from the first squeegee in the off-hook condition in which it sucks the film and then the first batten the film releases. Of course, this requires a certain rigidity of the existing film.

After the film has been lifted off and "allowed to drip off", more sensitive films can be deposited on the intermediate table, which may be in the raised area. The area near the edge of the film is now sufficiently supported and the returning second squeegee can easily pick up and transport the film from the intermediate table there. As soon as the end of the film being transported is out of the way, the first squeegee can begin to lift the next film.

Preferably, moreover, the film can be held on the intermediate table by means of vacuum or manual clamps, so that the first squeegee can move out of the way.

In particular, however, it is provided for the flying transfer or for the transfer to the intermediate table, that the squeegee or the arrangement of the sucker on the squeegee is designed so that they are arranged to mesh with each other. This is particularly advantageous in the case of a flying takeover of the film. For this purpose, it is particularly preferably provided that the suckers are attached to the suction bars by means of spaced profiles, wherein the profiles of the two suction bars are arranged in meshing relation to each other.

Alternatively or in combination, it may be provided that means for the film, preferably vacuum surfaces, are arranged on the intermediate table. Depending on their needs, these can be switched with regard to their activity and their strength can be regulated.

Alternatively or in combination, it may be provided that a blow bar is arranged for underblowing the film lifted by the first suction strip. This can preferably be arranged on the intermediate table. Alternatively or in combination it can be provided that is movably arranged to the intermediate table respectively movable with the Zwiscentisch.

Preferably, the blowing strip is formed separately and underpins the film. The retracted intermediate table can serve as an air guide and ensure optimum introduction of the blowing air between the film and the film stack. The intermediate table can also be integrated in the blow bar or vice versa, as shown in the embodiment. It is preferably provided that a blow bar, an intermediate table formed as a blow bar, an intermediate table and / or an intermediate table with a blow bar between raised foil and film stack enters and provides for the "mechanical and / or pneumatic separation".

Alternatively or in combination can be provided that the suction with a pneumatic vacuum device and the blow bar with a pneumatic pressure device are operatively connected.

The solution for the method for transporting films from a film stack to a laying area, wherein a first film is lifted from the film stack with a first squeegee and then deposited by a second squeegee on the shelf, consists essentially in that the first film a predetermined area on the side pointing in the direction of transport is lifted from the squeegee and then the film is substantially taken in a direction of transport in the transport direction of the second squeegee and transported to the site and stored there, the lifted film 1 after lifting off a sub-table is approached against the transport direction.

In the sense of "driving under", it is not absolutely necessary that the intermediate table underlies the film touching or supportive. Rather, it is provided that the film is then stored in a non-flying transfer, from the first squeegee to the intermediate table. An arranged on the intermediate table or stand-alone blow bar can then inflate the film. Preferably, the blow bar will be arranged cooperatively with the intermediate table, in particular preferably in one piece. Alternatively or in combination, the intermediate table can direct the flow of air from the blow bar.

Preferably, the first squeegee starts with the lifting of the next film from the film stack when the opposite of the transport direction edge of the first film has left the film stack.

Alternatively or in combination, the first squeegee may transfer the film to the second squeegee. Preferably, it may additionally be provided that the second suction strip takes over the film from the first suction strip and / or from the intermediate table.

Alternatively or in combination, the two suction strips or the suction pads, which are preferably arranged on spaced profiles, can mesh during the transfer of the film.

Alternatively or in combination, the film may be held on the intermediate table, preferably with negative pressure, the first squeegee and / or by mechanical means.

Alternatively or in combination, the film can be blown after being lifted from the film stack by means of a blow bar, preferably with a blow bar, more preferably with a movable and / or arranged on the intermediate table blowing bar.

Alternatively or in combination, the intermediate table can be moved in height, preferably for producing the contact with the film held on the first suction strip.

The device can be operated independently by the method, but is particularly preferably suitable for carrying out the method.

Further advantageous and expedient embodiments of the invention are described below with reference to the drawing and specified in the dependent claims.

• Figur 1 eine schematische Seitenansicht der Vorrichtung in Transportrichtung der Folien vom Folienstapel links nach rechts zu einem Legeplatz,
• Figur 2 eine Draufsicht auf die Vorrichtung nach Figur 1 und
• Figur 3 eine Schnittansicht X2-X2 nach Figur 1 der optional kämmenden Saugleisten.

Show it:

• FIG. 1 a schematic side view of the device in the transport direction of the films from the film stack left to right to a berth,
• FIG. 2 a plan view of the device according to FIG. 1 and
• FIG. 3 a sectional view X2-X2 after FIG. 1 the optional meshing squeegee.

FIG. 1 shows a schematic side view of the device with the transport direction 9 of the sheets 1 from the film stack 2 left to right to a berth 12. On the landing usually a transport device, here a movable laying table 11, provided on the example, a substrate, here a material plate 16th , is ready so that the film to be transported 1 can be stored here. The depositing is normally oriented and is carried out with corresponding embodiments of the laying table 11 and / or the suction strips 3/6, these are not further explained here.

Alternatively, to the laying table shown here, a conveyor belt may be provided, is placed on the directly or on a arranged there substrate (material plate).

The second squeegee 6, mainly responsible for the transport of the film 1, will be movably mounted on a traverse 15 by means of a suitable drive. The first squeegee 3 can also be movably arranged via this traverse 15 or its own portal. For the movements along the arrows shown on both suction bars 3, 6 and the intermediate table 13 also suitable but not further illustrated drives are provided. Instead of a cross member 15 shown, other suitable means are conceivable that can guide the suction strips 3, 6 respectively to drive.

Advantageously, the device is now able to separate and transport films 1 from the film stack 2 at a high frequency. The new device allows the film separation (lifting and, if necessary, drain another film) at the same time with the transport of a film 1 on the shelf 12. In this case, the first raisable and lowerable squeegee 3 near the film stacking edge in a region 17, the in Direction of transport 9 has, sucks the top sheet 1 and lifts them from the film stack 2 from. After the dripping time, which is predetermined according to stickiness and other conditions, an intermediate table 13 underlays the film 1 and / or the suction strip pulls the film 1 in the transport direction 9 so far that it comes to rest in the region 17 on the intermediate table 13. This can be before, during or subsequently be underblown, preferably with an independent or attached to the intermediate table 13 Blasleiste14. In this case, the film 1 is preferably deposited on the intermediate table 13 by the first squeegee 3, which is preferably arranged above the film stack 2 during underblowing. The first squeegee 3 preferably holds the film 1 during the blowing process or until the second squeegee 6 has fixed the film 1. After the underblowing time or supportive an air carpet by underblowing pulls the second squeegee 6, the film in the transport direction 9 from. As soon as the film 1 has left the area of the first squeegee 3 and thus the film stack 2, the first squeegee 3 can begin the next cycle.

In FIG. 2 can be seen on the basis of the plan view that the area 17 is provided in the transport direction of the film 1 and the film stack 2, which is located substantially at the edge of the film 1, which leads the film 1 in the transport direction 9. Here, preferably, the suckers 5 of the first squeegee 3 attack. Due to the drawn section line X2-X2 in FIG. 1 but is not visible in the area 17 of the teat 5 itself, but the visible from above profile 4, which is arranged between the nipple 5 and the squeegee 3. The squeegee 5 is located after FIG. 1 In order to better enable the meshing effect, the profiles of the squeegee 6 are not arranged in the vertical but obliquely thereto. In a flying acquisition, the squeegee 6, respectively the profiles 7 with the suckers 8 arranged thereon next to the suckers 5 of the first squeegee in the area 17 begin, or the suckers 5, 8 meshing with the aid of the spaced-apart profiles 4, 7th

If the second squeegee 6 has taken over the film 1 from the first squeegee 3 or from the intermediate table 13, the film is transported in the direction of the laying position 12 and positioned and deposited on the material plate 16, respectively a means of transport.

Between the berth 12 and the film stack 2, a means for underblowing the lifted film may be arranged, in particular, this may be integrated in the intermediate table 13. Particularly preferably, this blowing strip 13 would be movably and / or pivotably arranged in the intermediate table 13 in order to meet the blowing effect of the conditions, particularly preferably of a decreasing film stack 2.

In a FIG. 3 can be seen in a view the extension of the Blasleiste 3 across the plane. For a meshing embodiment 3 spaced profiles 4 are arranged on the squeegee, at the End of the nipple 5 are arranged to receive the film 1. The underlying suction strip 6 is only partially drawn, in particular, the meshing machine elements, the profiles 7 are shown with the suckers 8.

Particularly preferred are two identical running suction strips 3, 6 use, which are offset from each other and can comb so.

List of Reference Numerals: ZP 1018

1.

foil

Second

film stack

Third

Squeegee (first)

4th

Profile (first)

5th

Mammal

6th

Suction strip (second)

7th

Profile (second)

8th.

Mammal

9th

transport direction

10th

Storage place of 2

11th

Legetisch

12th

berth

13th

intermediate table

14th

blowing strip

15th

traverse

16th

Material board

17th

Area

Claims (16)

1. Device for transporting sheets, comprising

   - a storage location (10) for accommodating a sheet stack (2) of a plurality of sheets (1),

   - a laying location (12) for depositing a sheet (1) from the sheet stack (2),

   - a first suction bar (3) with a drive for lifting a sheet (1) from the sheet stack (2) by means of suction cups (5), and

   - a second suction bar (6) with a drive for transporting a sheet (1) in the transport direction (9) to the laying location (12),

   - suction cup (5, 8) for fixing the sheet (1) to the suction bars (3, 6), and

   - an intermediate table (13) between storage location (10) and laying location (12), wherein

   - the first suction bar (3) is suitable for lifting the sheet (1) from the sheet stack (2) substantially in a predetermined region (17) at the edge facing in the transport direction (9), characterized in that

   - the intermediate table (13) with a drive is adapted to move beneath the lifted sheet (1) at least in the region (17),

   - the second suction bar (6) is adapted to receive the sheet (1) substantially in this region (17), to transport it to the laying location (12) and to deposit it there.
2. Device according to claim 1, characterized in that the first suction bar (3) is adapted to transfer the sheet (1) to the second suction bar (6) and/or to deposit it on the intermediate table (13).
3. Device according to claim 1, characterized in that and/or in that the second suction bar is adapted to receive the sheet (1) from the first suction bar (3) and/or from the intermediate table (13).
4. Device according to claim 1, characterized in that the suction cups (5, 8) are fastened to the suction bars (3, 6) by means of spaced-apart profiles (4, 7), wherein the profiles (4, 7) of the two suction bars (3, 6) are arranged so as to mesh with one another.
5. Device according to claim 1,characterized in that on the intermediate table (13) there are means for the sheet (1), preferably vacuum surfaces.
6. Device according to claim 1, characterized in that a blow bar (14) for blowing under the sheet (1) lifted by the first suction bar (3) is arranged, preferably on the intermediate table (13) and in particular preferably movable thereto.
7. Device according to claim 6, characterized in that the suction cups (5, 8) are operatively connected to a pneumatic vacuum device and the blow bar (14) is operatively connected to a pneumatic pressure device.
8. Device according to one or more of the preceding claims, characterized in that the intermediate table is arranged in a height-adjustable manner.
9. Method for transporting sheets from a sheet stack (2) to a laying location (12), wherein a first sheet (1) is lifted from the sheet stack (2) by a first suction bar (3) and then deposited on the laying location (12) by a second suction bar (6), wherein

   the first sheet (1) is lifted from the suction bar (3) at a predetermined region on the side facing in the transport direction (9), and the sheet (1) is then picked up substantially in a region (17) lying in the transport direction (9) and transported to the laying location (12) and deposited there, characterized in that

   after lifting the lifted sheet (1) is passed under by an intermediate table (13) against the transport direction (9).
10. Method according to claim 9, characterized in that the suction bar (3) begins to lift the next sheet (1') from the sheet stack (2) when the edge of the first sheet (1) opposite from the transport direction (9) has left the sheet stack (1).
11. Method according to claim 9 or 10, characterized in that the first suction bar (3) transfers the sheet (1) to the second suction bar (6) and/or deposits it on the intermediate table (13).
12. Method according to one or more of claims 9 to 11, characterized in that the second suction bar (6) receives the sheet (1) from the first suction bar (6) and/or from the intermediate table (13).
13. Method according to one or more of claims 9 to 12, characterized in that the two suction bars (3, 6), or the suction cups (5, 8) arranged on spaced profiles (4, 7) respectively, mesh during the transfer of the sheet (1).
14. Method according to one or more of claims 9 to 13, characterized in that the sheet is held on the intermediate table (13), preferably with vacuum, the first suction bar and/or with mechanical means.
15. Method according to one or more of claims 9 to 14, characterized in that the sheet is underblown by means of a blow bar after it has been lifted from the sheet stack (2), preferably with a blow bar (14), particularly preferably with a blow bar (14) which is movable and/or arranged on the intermediate table (13).
16. Method according to claim 9, characterized in that the intermediate table (13) is moved in height, preferably to establish contact with the sheet held on the first suction bar (3).

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