EP1772407B1 - Personnel protection device in a roll changer for a printing machine - Google Patents

Description

The invention relates to a equipped with a personal protection device roll changer for a printing press.

Reel changers are known from the prior art and z. B. in the EP 0 436 825 or the EP 1 223 134 described in detail. The reel changer has, in order to ensure a continuous processing of the paper rolls, multi-arm reel carrier. If a paper roll is used up on a first arm of the winding roll carrier, then the winding roll carrier pivots the paper roll stored on the other arm so that it, after a certain transition in which the paper web of the new paper roll is glued to the paper web of the almost used paper roll, the production process can be used.

From the publication DE 196 06 554 C1 a reel changer is known in which a trained as a satellite vehicle lifting device receives a new roll of paper from a roll of paper, and then the roll of paper is transversely movable to the direction of movement of the satellite vehicle portal frame, the roll of paper is then fed to the actual reel splicer.

For the used paper roll, a new paper roll is brought up to the roll stand and thus the winding roll carrier on a transfer table which is likewise known from the prior art. The area between the approaching transfer table and the roll stand is referred to below as loading page.

Persons who are in the area of this loading side are at risk for wide rollers in that the sleeves of used or almost used paper rolls burst by reaching the natural frequency speed. Hereinafter, the diameter of a used or nearly used paper roll is referred to as a critical diameter. Due to the high number of revolutions that a roll of paper, and therefore also this residual sleeve, can reach, the breaking of the sleeve equates to an explosion in which numerous small and large sleeve parts are thrown through the air.

In the prior art, therefore, light barriers are provided which are arranged in the region of the loading side. Furthermore, in the prior art rolling doors are provided for personal protection, which are pulled down for protection on the loading side. These roller doors must either be electronically controlled so that they are operated only in the event that a paper roll reaches a critical diameter, or the roller doors are permanently closed so that they must be removed each time skilled personnel work in the area of the loading side got to.

Based on the cited prior art, the invention is therefore an object of the invention to provide a reel splicer for a printing machine with a protective device, the most reliable and cost-effective persons in the loading side only in the critical, i. protects people from dangerous printing process times.

This object is solved by independent claim 1 of the present invention. The other dependent claims are advantageous embodiments of the invention.

According to the basic idea of the present invention, a roll changer for a printing machine with a roll stand is provided, wherein the roll stand receives the paper roll to be processed on its winding roll carrier. In front of the reel stand, feeding of new rolls of paper is provided by means of a sliding table arranged on the floor. Between the traverser and a holding device, which is also on the loading side on a side opposite the reel changer side, a protective device is provided. The protective device is variable in its surface area.

The protection device, e.g. a safety net is stored at least two points. On the one hand on the traverser, which moves to the roll stand when a new roll of paper is transported to the roll stand, and on the other at a fixed point, namely the holding device, opposite the roll stand on the loading side, of which the traverser when supplying a moved away from a new role. When the protection device is e.g. around a safety net, this safety net is attached to vertical posts in such a way that the safety net forms as smooth a surface as possible when the traverser moves onto the roller stand.

Since the traverser with the new roll of paper always moves to the roll stand when a roll of paper on the roll stand is near the end, the protection device, such as e.g. the safety net, whenever the roll of paper assumes a critical diameter, i. is in a fragile state. The rest of the time is the traverser in a position at the holding device, i. removed from the roll stand and thus the protection device is not built before the roll changer.

As a result, this means that persons on the reel splicer are reliably protected against fragments of exploding sleeves, whenever this is necessary due to the diameter of the residual paper roll. At any other time, the area on the loading side of the roll changer can be entered freely, which facilitates the work on the printing press. The protective device does not require any additional electronics or actuators, which increases the reliability of the system due to the small number of components.

According to an advantageous embodiment of the invention, the protective device is provided on both sides of the traverser. That is, the sides parallel to the direction of movement of the traverser are secured when the traverser moved in the direction of the roll stand. It is inventively desirable that both sides are shielded on the loading side of the roll changer, provided that both sides are freely accessible to persons. If this is not the case, then the protection device is not necessary on both sides.

According to a further advantageous embodiment of the invention, the protective device, such as e.g. the above-mentioned safety net, designed so that, on the one hand, fragments of a bursting paper roll sleeve are collected by the protective device, but on the other hand, the persons in the press area a clear perceptible barrier for the area on the loading side of the roll changer is offered. That is, on the one hand, the protection device must either be continuous or very tight mesh to protect against flying minutiae, on the other hand, for example, typical warning colors and solid materials should be used to the skilled personnel in the loading side of the reel changer a clear warning and not allow him to remove the barrier at short notice. To further support the character of a fixed barrier, it may be further contemplated that skilled personnel will not be able to manually remove the protection device or at least use a readily visible warning light and / or warning siren if the qualified personnel remove the protection device.

According to a further embodiment of the invention, a pinch protection on the protective device is provided to prevent persons being trapped between the protective device and the roll stand. Furthermore, the anti-pinch device should also serve to prevent anybody from being caught between the protective device and the holding device. The anti-jamming can be offered for example in the form of a spring-loaded bracket, which is attached to the safety net and is moved by the traverser in the direction of the roller stand. The sprung bracket may be part of a frame to which the safety net used as a safety device is attached. The frame is also attached to its end pieces on the traverser.

Another component of the frame may be a running rail, which is arranged between the holding device and the roll stand. As a holding device, this may e.g. to serve a partition. The running rail can be fixed to the roll stand and holding device. In this embodiment, then make sure that the running rail is mounted as high as possible, so that the skilled personnel can go through with remote protection device under the track.

Figur 1 a:

eine Seitenansicht des erfindungsgemäßen Rollenwechslers mit geschlossenem Fangnetz;

Figur 1 b:

den erfindungsgemäßen Rollenwechsler mit geöffnetem Fangnetz;

Figur 2a:

eine Draufsicht auf den Rollenwechsler mit geschlossenem Fangnetz;

Figur 2b:

eine Draufsicht auf den erfindungsgemäßen Rollenwechsler mit geöffnetem Fangnetz;

Figur 3a:

eine Seitenansicht der schematisch dargestellten Schiebebühne gemäß einer Ausführungsform der Erfindung;

Figur 3b:

eine Seitenansicht der Schiebebühne mit zusammengeschobenen Gitterelementen;

Figur 3c:

einen Klemmschutz für eine Ausführungsform der Erfindung;

Figur 4:

eine weitere Ausführungsform der erfindungsgemäßen Schutzvorrichtung;

Figur 5a:

eine Draufsicht auf den Rollenwechsler mit geschlossenem Rolltor;

Figur 5b:

eine Draufsicht auf den Rollenwechsler mit offenem Rolltor.

The present invention will now be described by way of example with reference to the accompanying drawings. It shows:

FIG. 1 a:

a side view of the reel changer according to the invention with closed safety net;

FIG. 1 b:

the reel changer according to the invention with open safety net;

FIG. 2a:

a plan view of the reel changer with closed safety net;

FIG. 2b:

a plan view of the reel changer according to the invention with open safety net;

FIG. 3a:

a side view of the schematically illustrated traverser according to an embodiment of the invention;

FIG. 3b:

a side view of the traverser with collapsed grid elements;

FIG. 3c:

a pinch protection for an embodiment of the invention;

FIG. 4:

a further embodiment of the protective device according to the invention;

FIG. 5a

a plan view of the reel changer with closed roller door;

FIG. 5b:

a plan view of the reel changer with open roller door.

FIG. 1a shows a reel changer 1 in a first position, ie a position in which the traverser 2 is located directly on the roll stand 10. In this state, according to this first embodiment of the invention, the safety net 3 is stretched in front of the roller stand on the loading side. The safety net 3 is attached to the partition wall 5, which serves as a holding device according to the invention, and the traverser 2. The movement of the safety net is guided by the running rail 4, which is fixedly mounted between the partition wall 5 and the roller stand 10. In this first position of the traverser is a residual role 6 with critical diameter in the roll stand 10th

Figure 1 b shows a second position of the reel changer according to the invention 1. In this position, the traverser 2 is located on the partition wall 5, so that the safety net 3 is gathered like a curtain and the loading side 12 is freely accessible.

FIG. 2a shows a plan view of the roll changer of the first embodiment in its first position. In the plan view can be seen that the safety net 3 is clamped both on both sides of the roller stand 10 and in the area above the traverser 2, ie between the rails 4. That is, a frame 14 of two rails 4 and three sprung brackets 8 is arranged between the roller stand 10 and the partition 5 that a secured space 7 is formed.

FIG. 2b shows the reel changer in a plan view at a time when the traverser is located on the partition wall 5. Especially in this second position, that is, when the loading side is not protected by the safety net, it may be useful to the people in the potentially hazardous area still refer to the danger situation and provide area coverage by means of light barriers 9. Due to the signal emitted by the light barrier, a visible or audible signal can then be output to the person in the area of the reel changer.

FIG. 3a shows a further embodiment of the invention according to the invention. In FIG. 3a is only the sliding table 2 according to the invention with thereon grid elements 15 in the first position, ie the position with a closed protection device shown. Instead of the safety net, a grid is used in this embodiment. In order for the grid to remain variable in areal extent, it is made up of several grid elements. These grid elements are mutually displaceable and fastened to each other, so that the first, attached to the traversing grid element pulls the other grid elements behind it. Thus, the last grid element remains in place, instead of the partition wall 5 from the first embodiment, a floor anchor 11 can be selected as a holding device. FIG. 3b shows the second embodiment of the invention in the second position, ie the position in which the loading side is not secured by the protection device. In order to provide a suitable terminal protection for the protective device according to this embodiment, for example, a clamping spring 13 can be used as in Figure 3c is shown. The first grid element 15, which is attached to the traverser, is only fastened in the clamping spring, which opens into a rail. Acts a force F, as in FIG. 3a represented against the first grid element, so an anchorage of the first grid element of the jumps in Figure 3c round fastening part of the spring in a mounted on the traverser 2 rail. Should a person stay between roller stand and traverser, so it is not clamped by the grid element 15.

FIG. 4 shows a third embodiment of the invention, in which, as in the second embodiment of the invention, the protection device consists of grid elements 15, however, the grid elements 15 are not parallel to each other displaceable, but fold like a concertina to each other and away from each other. Furthermore, this embodiment can also be realized by a bellows with a flexible material that can also vary zieharmonikaartik in the surface area. Also in this embodiment is a pinch protection 13, as in Figure 3c shown, provided.

A fourth embodiment of the invention is in FIGS. 5a and 5b shown. FIGS. 5a and 5b show top views of two operating states of the reel splitter, as well as in FIGS. 2a and 2b are shown. This embodiment differs from the other embodiments in that a rolling door 16 is used as a protective device. Advantageously, the roller shutter 16 is provided on each side of the traverser. In the pushed together state, ie when the loading side is freely accessible, the parts of the roller shutter 16 are pushed together, as in Fig. 5b shown. However, it is also conceivable further known from the prior art space-saving techniques, such as the rolling of the roller shutter 16.

LIST OF REFERENCE NUMBERS

1

reelstands

2

traverser

3

catchall

4

runner

5

partition wall

6

Residual roll with critical diameter

7

secured space

8th

Sprung bracket

9

Area protection by means of a light barrier

10

roller stand

11

ground anchor

12

loading side

13

trap protection

14

frame

15

grid elements

16

rolling gate

Claims (12)

1. A roll changer (1) for a printing machine having a roll stand (10), which receives rolls that are to be processed, and a sliding platform (2), which feeds the rolls that are to be processed from a loading side (12) to the roll stand (10),
   characterised in that
   a protection device (3), which is secured to the sliding platform (2) and a holding arrangement (5, 11) and has a variable surface extent, is arranged on the loading side (12) to safeguard an area between the holding arrangement (5, 11) and the sliding platform.
2. A roll changer (1) for a printing machine according to claim 1, characterised in that the protection device (3) is provided on both sides of the sliding platform (2) and/or above the sliding platform (2).
3. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that the protection device (3) is formed in such a way that it provides protection from broken pieces of a bursting paper-roll core.
4. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that the protection device (3) is formed as an easily perceptible barrier for the area on the loading side (12).
5. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that a protector (13) against pinching is provided on the protection device (3) in order to prevent personnel from becoming pinched between the protection device (3) and the roll stand (10) and/or the holding arrangement (5, 11).
6. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that at least one light barrier is provided to safeguard the area on the loading side.
7. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that the protection device (3) is guided on a runner rail (4) above the sliding platform (2) between the roll stand (10) and the holding arrangement.
8. A roll changer (1) for a printing machine according to claim 7, characterised in that the runner rail (4) consists of telescopically extendable partial elements and is secured to the sliding platform (2), or is secured to the roll stand (10).
9. A roll changer (1) for a printing machine according to claim 7 or 8, characterised in that a plurality of runner rails (4) are connected to form a frame (14), with the runner rails (4) being connected by means of spring-mounted clips (8).
10. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that the protection device (3) with a variable surface extension is an arrester net and in particular an arrester net made from plastics material.
11. A roll changer (1) for a printing machine according to one of the preceding claims, characterised in that the protection device (3) with a variable surface extension is constituted by fixed grid elements (15) which are displaceable in relation to each other.
12. A roll changer (1) for a printing machine according to one of claims 1 to 10, characterised in that the protection device (3) with a variable surface extension is a roller gate (16) or a bellows.

Images