WO2009013259A1

WO2009013259A1 - Application apparatus

Info

Publication number: WO2009013259A1
Application number: PCT/EP2008/059504
Authority: WO
Inventors: Christoph Henninger; Manfred Ueberschär
Original assignee: Voith Patent Gmbh; Oerter, Jürgen
Priority date: 2007-07-26
Filing date: 2008-07-21
Publication date: 2009-01-29
Also published as: DE102007034838A1

Abstract

The invention relates to an apparatus for the application of a coating medium (3, 3') on a moving paper, carton or other web (5) with at least one application device (4, 8) and/or at least one doctor device (11) for measuring out and/or equalizing the medium (M, M') deposited on the web (5), wherein the application and/or doctor device (4, 8, 11) is arranged on each pivotable supporting beam (6), and wherein service personnel (P) monitor the application device (4, 8) and/or doctor device (11) while in operation and/or render service and maintenance measures. According to the invention, an accessible, horizontally oriented tread (7) for the service personnel (P) is permanently assigned to each supporting beam (6), wherein the tread (7) is movable and maintains the horizontal orientation thereof even during movement.

Description

applicator

The invention relates to a device for applying a coating medium on a running paper, cardboard or other fibrous web in their manufacture or refinement, with at least one applicator and / or at least one doctor device for metering and / or leveling of the applied to the fibrous web medium, wherein Operating personnel monitors the applicator and / or doctor device in operation and / or performs service and maintenance.

Reference is hereby made to EP 0 565 508 B1.

The applicator and / or the doctor device are usually arranged in each case on a in one operating position and in a service or maintenance position pivotable support beams. Not always sufficient standing positions are available for the operating personnel.

In the paper mills in which a paper or board web is manufactured and finished, are usually only simple, staircase-like podiums made of wood or aluminum available, which must be brought by the operator of the machine to the desired locations.

These pedestals are often ergonomically unfavorable, do not provide sufficient access and visibility for the operators, and as a rule, are not positioned in the correct location. The procurement and positioning of treads, platforms, platforms, etc. is therefore cumbersome and time ig.

The invention has for its object to provide an application device with an ergonomically favorable and specially suitable for the operator of this device tread.

According to the invention the object is achieved in that the respective support beam for the applicator and / or the doctor device a walk-in, horizontal aligned tread is permanently assigned to the operator of the device, wherein the tread is designed to be movable, that this also maintains its horizontal orientation during movement.

As a result, the accessibility to the machine, especially wide, large machines is possible at any time. In addition, thus significantly improved working conditions in the operation, service and maintenance of the device in the manufacturing and finishing machine of the fibrous web are created. The device according to the invention also offers the possibility of individual adaptability to the different body sizes of the operating personnel.

It is particularly advantageous if the tread is height-adjustable and / or horizontally adjustable. Accessibility is easier, faster and safer than before.

The tread is suitably designed as a catwalk with at least one guardrail. The purpose of the catwalk is also to understand a platform or a pedestal. The guardrail should at least be present on the side facing the support beam in order to avoid crushing hazards.

It is also expedient if the tread is transversely, i. along the support beam or transversely to the machine direction of leader to drive side is movable. This is particularly suitable for off-line machines. In online machines, a movability along the travel path of the fibrous web makes sense.

It is very useful if the tread or catwalk is connected via a positive guidance system with the support beam. That is, the movement of the tread is coupled to the movement of the support beam. In other words, simultaneously with the change in the position of the support beam, the position of the tread surface is also changed in the same direction.

This ensures optimal accessibility for the operator. In the sense of the movement of the support beam is to be understood a pivoting, or a pure rotation or a pure translation thereof.

The coupling between the support beam and tread can be done mechanically or electrically.

In doing so, the tread surface is positioned in dependence on the support beam position in such a way that necessary safety distances for the operator (for example to avoid bruising, etc.) are maintained. The distances to be maintained are specified in special standards.

A very simple way of adjusting the height of the tread or the catwalk is to do this mechanically by means of a scissors construction. Such a scissors construction is already known from commercial lifting tables or pallet trucks.

Incidentally, the tread is movable electrically, pneumatically (for example by means of air bags) or hydraulically (for example by means of hydraulic cylinders). The use of an electrically operated train system is also conceivable.

In order to be able to walk or leave the tread surface quickly and safely in the event of dangerous situations within the machine, it is likewise advantageous to provide a permanently installed access, possibly with the involvement of a bevel. This access allows at any time access to or exit from the tread from any height, starting from or ending at the base or the bottom surface of the device.

The tread or catwalk advantageously has at least one grate as a running surface (bottom surface). These are non-slip due to their shape. Alternating but smooth surfaces would be conceivable, which are provided with a non-slip or a water-repellent or dirt-repellent-looking paint. Based on embodiments, the invention will be explained in more detail.

Show it:

Fig.1: schematic representation of a coating machine with two successively arranged application devices for applying a double layer on a paper, cardboard or other fibrous web and with an arrangement of treads for the

Operating personnel of the device,

2 to 7: different variants of the arrangement of treads,

FIG. 1 shows a coating machine 1 with a first application device 2, ie a film press, comprising two rolls 2a and 2b forming a nip N with one another for the indirect application of a liquid to pasty application medium 3, for example a coating color. Applied in the example is the application medium 3 with a coating unit 4. This device 4 has an application nozzle 4a and a doctor element 4b, which immediately equalizes the applied application medium, that is evened out. The device 4 initially applies the application medium 3 to the peripheral surface of the roller 2a. In Nip N, which passes through the fibrous web 5 from top to bottom in the example, the transfer of the medium 3 then takes place on the underside of the fibrous web 5. The device 4 with the elements 4a and 4b sitting on a support beam 6, for the purpose of non-use or for the purpose of cleaning or maintenance or the service for the device 4 of the roller 2 is swung off, as indicated by double arrow. It can be seen in FIG. 1 that the support beam 6 is assigned a walk-through, horizontally oriented tread surface 7 (to the left of the support beam) for the operating personnel of the device. This tread surface 7 is constantly present and movable, in particular designed adjustable in height, as the vertical double arrow is to show. The tread surface 7 also consists of an aluminum grating, which is non-slip due to its structure.

The first application device 2 is followed by a second application device 8 according to the example shown in FIG. This is a direct coater. The device 8 has a back-up roller 9 and an application roller 10 assigned to the back-up roller 9 and a doctor device 11 arranged downstream of the unit 10 in the running direction L of the fibrous web 5. The doctor device is also assigned to the support or counter roller 9. With the doctor device 11, the application medium 3 'applied here is brought to the desired coating weight, that is to say, for example, g / m ² .

Here is also an electrically, pneumatically or hydraulically movable tread surface 7 (or pedestal or catwalk or operating platform), as in the first application device 1 is present. It is very important that this tread surface retains its horizontal orientation during its movement or height adjustability, so that the operating personnel P always has a secure footing and optimum accessibility to the applicator or squeegee device 4 and 11, and if desired also 10.

The tread surface 7 also has at least one vertical guardrail 12.

FIG. 1 also shows that the tread surface or catwalk 7 is connected to the support beam 6 via a positive guide 13. When moving the support beam 6 can thereby also be a coupled to the support beam movement of the tread 7 done. This ensures optimal accessibility for the operating personnel.

The movement of the tread is done in each case so that standardized safety distances at dangerous locations can be maintained at any time. For the sake of completeness, web guiding rollers 14 and scrapers 15 for keeping the rollers 2b and 9 clean are also shown in FIG.

Figure 2 shows the possibilities of height adjustment of the tread surface 7 from a base B. The height adjustment is achieved here with a mechanical scissors construction 16 and at least one hydraulic cylinder 17.

FIG. 3 shows that the tread surface 7 can also be moved horizontally along the foundation 17 of the devices 1 and 8 from FIG. 1, which is why it is equipped with rollers 18. In the moved position, the tread including the operator P is shown in dashed lines.

By contrast, Figure 4 shows a height adjustment by means of a pivoting of the tread surface 7. By suspension 19 of the tread surface 7 at parallel points, the height adjustment takes place during the pivoting. As a result, the tread surface 7 and thus the stand for the operator 12 is always aligned horizontally.

Figures 5 and 6 show that the accessibility to the tread surface 7 is maintained in different height position.

In both Figures 5 and 6 it is shown that the tread surface or the catwalk 7, via an access 20 from the foundation or from the base surface B of the two application devices 2 and 8, always accessible. This access 20 is also shown in FIG.

In Figure 5, an adjustable with the tread surface 7 oblique track 21 is provided between the base surface 17 and the superscript tread surface 7.

In contrast, the possibility of a temporary access 20 present at the base area B is shown in FIG. Another possible height adjustment of the tread surface 7 via at least one tension system 22 is indicated in FIG. For this purpose, at least one pull rope 23 is provided, which is attached to the tread surface 7 and runs over an adjustable pulley 24. A Zugbetätigungseinrichtung 25 pulls the tread to the desired height and also lowers it.

LIST OF REFERENCE NUMBERS

1 coater

2 first application device

2a roller

2b roller

3, 3 'application medium

4 application device

4a application nozzle

4b squeegee element

5 fibrous web

6 stringers

7 tread or platform or platform

8 second application device

9 support roller

10 application aggregate

11 squeegee device

12 protective railings

13 Forced operation

14 web guide roller

15 scrapers

16 scissors construction

17 hydraulic cylinders

18 roll

19 suspension

20 access

21 sloping career

22 train system

23 pull rope

24 pulley 25 Zugbetätigungseinrichtung

B base

L running direction

N Nip P operating personnel

Claims

claims

1. A device for applying a order smedi order (3, 3 ') on a running paper, cardboard or other fibrous web (5) with at least one applicator (4, 8) and / or at least one doctor device (11) for metering and or equalization of the on the fibrous web (5) applied medium (M, M '), wherein the applicator and / or doctor device (4, 8, 11) each on a pivotable support beam (6) is arranged, and wherein

Operating personnel (P) monitors the application device (4, 8) and / or doctor device (11) during operation and / or performs service and maintenance measures, characterized in that the respective support beam (6) a walk-in, horizontally oriented

Tread (7) for the operating personnel (P) is permanently assigned, wherein the tread surface (7) is designed to be movable and also maintains its horizontal orientation during the movement.

2. Device according to claim 1, characterized in that the tread surface (7) is height-adjustable and / or horizontally adjustable.

3. Device according to claim 1 or 2, characterized in that the tread surface (7) is provided on at least one side with a protective railing (13).

4. Device according to at least one of claims 1 to 3, characterized in that the tread surface (7) transversely, ie along the support beam (6) or transversely to the machine direction of leader to the drive side and / or along the Running path (L) of the fibrous web (5) is movable.

5. The device according to at least one of claims 1 to 4, characterized in that the tread surface (7) via a positive guide (14) with the support beam (6) is connected.

6. Apparatus according to claim 5, characterized in that a movement of the tread surface (7) is coupled to the movement of the supporting beam (6).

7. The device according to at least one of claims 1 to 6, characterized in that the tread surface (7) is mechanically adjustable by means of a scissors construction (15).

8. The device according to at least one of claims 1 to 7, characterized in that the tread surface (7) is electrically, pneumatically or hydraulically movable.

9. Device according to at least one of claims 1 to 8, characterized in that the tread surface (7) via an access (20) from a base surface (17) is accessible.