DD203867A1 - DEVICE FOR FEEDING THE MATERIAL RAIL IN ROLL ROTATION PRINTING MACHINES - Google Patents

Abstract

The invention relates to a device for drawing in the material web in web-fed rotary printing machines. The aim is to create a cost-effective, reliable, machine downtime lowering retracting device. The object of the invention is to provide using simple technical means a functionally reliable working and characterized by simple Installiermoeglichkeit retracting device with a finite Einziehband, a take-up reel and driven by an electric motor via a switchable coupling drive roller. This is achieved by the winding coil acted upon by a brake being in driving connection with the drive of the drive roller via a slip clutch and an overrunning clutch, and the shafts carrying the takeup reel and the drive roller being mounted in a common housing to which the electric motor is fastened.

Description

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VEB Combined Polygraph

"Werner Lamberz" Leipzig jpg M _a / r

P 147

Device for drawing in the material web in web-fed rotary printing presses

Field of application of the invention:

The invention relates to a device for drawing in the material web in web-fed rotary printing machines.

- Characteristics of the known technical solutions:

DE-AS 25 32 168 shows a Papierbahneinziehvorrichtung for web-fed rotary printing presses, in which the paper web by means of finite funding, - for example, more flexible, band-shaped, is fed into the printing press. The conveyor is arranged laterally next to the paper web and is guided by arranged on the frame guide means. When pulling the conveyor is driven by a drive roller. It is taken from a store arranged at the beginning of the pull-in path and fed to a store located at the end of the pull-in path. After the paper has been fed, the conveyor is returned in the opposite direction. For band-shaped funding come as storage coils used. The respective winding coil is driven by a pneumatic, hydraulic or electric motor.

In this retraction device is disadvantageous that the conveying member due to its location next to the paper web latter

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draws obliquely to the paper direction. The recovered paper web can thereby run laterally and tear, which leads to the extension of the time for paper feeding and thus to increase machine downtime. Furthermore, the guide means for the funding increase the cost of the retraction device and require a larger installation effort. The use of a pneumatic or Hydraulikniotors as drive for the take-up reel has the disadvantage that a gaseous or liquid drive medium must be available. An electric motor drive requires control and is therefore expensive.

Object of the invention:

The invention aims to provide a cost-effective, reliable and thus reducing machine downtime retracting device.

Essence of the invention:

The invention has for its object, using simple technical means a functionally working and characterized by simple installation option device for feeding the web in web-fed rotary printing presses with a finite Einziehband, a take-up reel and the Einziehband promotional, driven by an electric motor via a switchable coupling drive roller to accomplish.

According to the invention the object is achieved in that the applied by a brake take-up reel is drivingly connected via a slip clutch and a one-way clutch to the drive of the drive roller and the take-up reel and the drive roller supporting shafts are mounted in a common housing to which the Elek-

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Troraotor is attached. According to the invention, the drive roller, the take-up reel and the electromotive drive are combined to form a complete unit, which is arranged in the web center region. As a result, the Einziehband pulls the web exactly in their direction, so the retraction process is done quickly and reliably without the risk of lateral bleeding and tearing of the web. The retractor is inexpensive to produce, since it is constructed of simple technical means and requires no guides for the Einziehband. Furthermore, the device is due to only a small Mon- _(daily expenses in printing machines can be easily retrofitted. The use of the retraction device is not tied to the presence of a hydraulic or pneumatic network, also not to a specific location of the printing machine. The apparatus may within the machine as required

80 are offset.

> Embodiment:

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawings shows

Fig. 1: a gravure roll rotation machine with the

Device for drawing in the material web 90

Fig. 2: the section AA of Fig. 1, shown schematically, rotated

3: the view Z of Figure 2, schematically 95th

Fig. 4: the hitch for the web.

The rotogravure machine shown in Figure 1 contains four printing units 1; 2; 3; 4, an unrolling

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-A-

and a folder 6. Between the last printing unit 4 and the folder 6 is below the region of the web 7, to this center, the retractor 8 is arranged. Your case 9 is not fixed to the frame, not shown, belonging to the invention. The housing 9 houses a take-up reel 10 and a drive roller 11, each on a shaft 12; 13 are rotatably mounted. The waves 12; 13 in turn are mounted in the housing 9. The drive roller 11 is looped by the Einziehband 14 and promotes this to the take-up reel 10. To improve the frictional engagement, the Einziehband 14 is printed by a pressure roller 15 against the drive roller 11. The drive roller 11 is driven by an electric motor 16 via a switchable coupling 17 and a slip clutch 18. The electric motor 16 is fixed to the housing 9, in the embodiment with the interposition of a flange, the transmittable torque of the slip clutch 18 is adjustable and is chosen so that the material web 7 to be recovered is not pulled too taut and tears.

120

The take-up reel 10 is driven by the shaft 13 via a belt drive 19, an overrunning clutch 20 and a slip clutch 21. The upper limit of the belt drive 19 is dimensioned so that the take-up reel 10 is driven even with the smallest winding diameter with lead over the transport roller 11. With the slip clutch 21, the equality of the peripheral speeds is produced. To avoid uncontrolled Abwickeins the Einziehbandes 14, the take-up reel 10 is acted upon by a brake 22.

For drawing in the material web 7, the draw-in tape 14 is brought by hand on the Einziehweg at the location of a web break or at the beginning of the Einziehweges. For this purpose, the switchable clutch 17 is disengaged before.

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Then the material web 7 to be gathered is fastened to the draw-in belt 14. For this purpose, advantageously, a rod 23 attached to the draw-in tape 14 or a reinforcing strip is used, around which the material web 7, which is bevelled on both sides, is wound (FIG. A). Now, after engaging the clutch 17 and turning on the electric motor 16, the pull-in belt 14 is pulled into the pull-in device 8 and the material web 7 is fed through the printing units 1 to 4.

The invention has been described in its use on a gravure roll press machine. Their application is also possible on offset or high-pressure roller presses.

..

Printing presses with reversible in their direction of rotation printing units need to be equipped with only one retractor, since the device can be implemented in each case behind the last of the material web traversed printing unit.

Claims (1)

238246 4 Invention claim: Device for drawing in the material web in web-fed rotary printing presses with a finite draw-in belt, a take-up reel and a drive roller which drives the draw-in belt and is driven by an electric motor via a shiftable clutch, characterized in that the take-up reel (10) acted upon by a brake (22) is activated by a slip clutch (10). 21) and an overrunning clutch (20) with the drive of the drive roller (11) is in driving connection and the take-up reel (10) and the drive roller (11) supporting shafts (12; 13) are mounted in a geraeinsamen housing (9) to which the electric motor (16) is attached. For this. jLieiten drawings