CZ200853A3 - Sheet guiding device - Google Patents

Abstract

A sheet guiding device usable in the area of loading of the rotack or sheet processing machine is provided with a detection device (9) for conveying the sheet in the loading zone to the conveyor roller (1) and the sheet guiding roller (2). The sheet guiding roller (2) rests on the conveyor roller (1) in tact and forms a gap (3) with the conveyor roller (1) for conveying the sheet conveyor. The drive device serves to alternately abut and lift the sheet guide roller (2) and the setting device (8) serves to adjust the gap (3) between the rolls. The detection device (9) serves to generate a signal indicative of the compressive force acting through the sheet guiding roller (2) on the sheet. Thus, the reaction forces acting in the region of the gap (3) between the rollers on the conveying roller (1) and the cylinder ( 2) the guide bar and transmitted by the printed substance and, on the basis of these measured quantities, optimize the configuration of the device, in particular the adjustment of the gap (3) between the rolls.

Description

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A device for screening the sheet, usable in the area of a roller loader or a sheet-cleaning machine, of a yarn for carrying the sheet in tact in the region of the loader to the transport roller (1) and to the scanning roller (2). The roll guiding roller (2) is in abutment against the conveying roller (I) and forms a gap (3) with the conveying roller (I). used for passing the sheet. 1 The device innovation is used to alternately engage and lift the roll guide (2), and the adjuster (X) is used to adjust the gap (3) between the rollers. The detection device (9) is used to generate a signal indicating the hook force acting through the rolls (2) of the sheet-to-sheet guiding, the reaction forces acting in the region of the gap (3) between the rolls on the conveying roller (I) and rolls (2) optimizing the configuration of the device, in particular by adjusting the gap (3) between the rollers, to guide the sheet and carry it over the printed substance and on the basis of these measured in the objects.

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Sheet guiding equipment

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a sheet guiding device which is provided with a conveying roller, a sheet guiding roller which abuts a conveyor roller in tact, in order to carry the sheet in tact in the region of a rotary loader or sheet processing machine. between the rollers serving for through-feed of the sheet, a drive device for alternately abutting and lifting the roll guide roll and a rappelling device for adjusting the gap between the rollers.

BACKGROUND OF THE INVENTION

It is known in the context of conveying a sheet from a stack of sheets in feeders to use a sheet guiding device which, as such, can be used in the area of a roll loader or sheet processing machine. Typically, there is a conveyor roller and a sheet guide roller resting on it. The conveyor roller and the sheet guide roller form a jointly defined gap between the rollers for passing through the sheet. In particular, the invention is directed to a sheet guiding device such as can be used to cover a suction table in tact with a sheet-like fabric.

A sheet guiding device of the aforementioned type is known from DE 40 05 144 ('2'). This conventional sheet guiding device comprises a conveyor roller located in the immediate vicinity of the sheet style as well as a sheet guide roller in tact abutting the conveyor roller.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The present invention is based on the object of providing a sheet guiding device of the type mentioned above, by means of which the configuration of the sheet guiding device can be reliably ensured in terms of the development of the rotary machine.

This object is achieved according to the invention by the features of claim 1.

According to the invention, the sheet guiding device for carrying out the tactile conveyance of the sheets in the area of the rotary loader or sheet processing machine is provided with:

- a transport roller.

a sheet guide roll which in abutment bears on the conveying roller, the conveying roller and the sheet guide roller defining the gap between the rollers for passing through the sheet.

a drive device for alternately engaging and lifting the sheet guiding cylinder, and

- adjusting the device for adjusting the gap between the rollers.

wherein the sheet guiding device is characterized by. that is provided with a detection device for generating a signal indicative of the compressive force applied by the sheet guiding roller to the sheet.

In this way, it is advantageous to capture the reaction forces acting in the region of the roll gap on the conveying roller and the sheet guide and conveyed by the printed substance and to optimize the sheet guide arrangement, in particular the roll gap setting, based on these captured measuring quantities.

According to a particularly preferred embodiment of the invention, the detection device comprises a sensor device which, as a lacquer, produces a sensor signal correlating with the abutment force of the conveyor roller. This sensor / arrangement can be implemented in particular as a high-rigidity force transducer.

Preferably, the sensor device is lacquered. This means that the time course of the force increase and the breakdown of the force during the standby cycle can be captured by or can be captured.

On the basis of the sensor signal thus obtained, it is possible to carry out an automated adjustment of the roll gap, this adjustment of the roll gap being possible in order to have a contact pressure in this roll gap depending on the mechanical properties of the print substance.

According to a particularly preferred embodiment of the invention, the sheet guiding device comprises a plurality of sheet guiding rollers, the sheet guiding rollers being associated with their own sensor device and preferably also with their own adjusting device. in terms of adjusting the gap between the rollers.

these sheet guide rollers run synchronously to one another or whether there are unintentionally large deviations.

It is possible to provide an electric drive for the alternating movement of the roll guiding rollers with respect to the conveyor roller, which electric drive is synchronized with the rotary device by means of signals. By virtue of this concept, the sophisticated adjusting mechanism and the transport of the sheet through the gap between the sheet guiding roller and the adjacent transport roller can be optimally aligned with the phase position of the rotary roller.

In a particularly preferred embodiment, the conveyor roller is also provided with an electric drive, which is also synchronized with the rotary device by means of a signal.

The sheet guiding device according to the invention is particularly suitable for positioning in an area lying downstream of the sheet stack, in particular for covering the suction table, with respect to the sheet flow. By means of the sensor devices designed according to the invention for detecting the contact force of the sheet guiding roll on the conveyor roll, it is also possible to carry out the double blank scanning and to export the correspondingly misfed printing sheets from the actual sheet flow.

Summary of the drawings

Further details and features of the invention will become apparent from the following description taken in conjunction with the drawing. The drawing shows:

Figure 1 is a simplified illustration of a sheet guiding device according to the invention which is lacquered with a sensor device for generating a signal indicative of the pressure of the roll guiding roll of the sheet against the conveying roll.

DETAILED DESCRIPTION OF THE INVENTION

The sheet guiding device shown in FIG. 1 serves to effect the sheet transport in tact from the BS sheet to the sheet conveying device here designed as a suction table SB.

The sheet conveying apparatus according to the invention comprises a conveyor roller 1 and a roll guiding roller 2 which in abutment bears on the conveyor roller to the conveyor roller 1 and the sheet guide roller 2 together define a gap 3 between the sheets used for conveying sheet B. is changed by alternating raising and lowering the roll guiding roller 2 to a range whose lower values are conditioned by the forced entrainment of the sheet B. running through the roll gap 3, and whose upper values cause the sheet B located sc in the roll gap 3 to disconnect from the transfer roller L

In the exemplary embodiment illustrated here, the alternating lowering and lifting of the sheet guide roller 2 takes place by means of the sheet guide shaft 4, oscillated in cycle. On this shaft 4 is supported a bearing block 5 assigned to the roll guide roll 2. The roller guide arm 7 is again mounted on this support block 5, rotatably mounted by means of a pivot pin 6. The rotational position of the roller guide arm 7 is adjustable relative to the support block 5 by means of the adjusting device 8. The adjusting device 8 is connected to the supporting block 5 via the sensor detecting device 9. By means of the sensor detecting device 9, it is possible to generate measurement signals that provide information on the pressure applied by the rollers 2 of the sheet guide against the conveyor roll. On the basis of these measuring signals, it is possible to fully automate the optimal setting of the minimum gap 3 between the rollers for optimum operation of the printing machine.

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Preferably, a plurality of two spaced-apart support blocks 5 are supported on the sheet guide shaft 4, here designed as a solid shaft, carrying the associated sheet guide roller 2. Preferably, a sensor detection device 9 according to the invention is provided in the sheet guiding unit so formed, in order to optimize the adjustment state of each roll guiding unit. In terms of timing synchronous, the oscillating drive of each sheet guide shaft 4 can be formed in particular by means of a crank drive or an eccentric drive, by means of a cam mechanism or also by means of other rotary actuators.

The adjusting device 8 according to the invention, designed to create the desired adjusting state, may in particular be implemented as a machine control center or otherwise advantageously accessible part of the machine by an electrically controllable adjusting device 8.

It is possible to integrate other measuring elements into the sheet guiding device by means of which the speed of the sheet guiding roller 2 and preferably also the speed of the conveying roller 1 can be detected.

The drive device designed to drive the transport roller 1 is preferably designed as an electric drive ML which is controlled by signals. It is possible for this electric drive M1 to be driven so. The roller is rotated with alternating angular speeds. Preferably, the sheet guide shaft 4 is also driven by a drive system comprising an electric drive M2. which is also controlled by signals. The suction table SB can also be designed with a separate electric drive M3, which is also controlled by a signal.

By means of the sensor detection device 9, as shown here, the time courses of the downforce force F of the roller guide 2 against the transport roller L can be captured and visualized. in terms of adjusting the gap between the rollers. It is also possible, by means of the captured measuring signals, to determine the sensor functions in the region of the loader, in particular the double-tap scanning.

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The invention is not limited to the embodiment described above. In particular, it is also possible to use the sheet guiding device according to the invention for the supply of print materials to the rotary machine which are not drawn off the sheet stack but continuously from the roll and only then are separated.

According to the inventive concept, it is possible to prevent the stopping due to different or erroneous moments of abutment of the roll guiding rollers. Furthermore, it is possible at any time, especially during the walk of the sheet, to check the actual values and possibly correct them. Corrections can be made automatically at least in the defined adjustment area without the need for operator intervention. The essential advantages which, as such, are achieved by the concept according to the invention lie in this. that the abutment of the roll guide roll 2 can be queried by a suitable sensor and the angular position at the abutment as well as the synchronization of the two rollers can be determined! and u can be notified to the operator, this information can lead to a correction of the bearing point using a suitable hand, electrical, pneumatic and / or magnetic adjusting device. As an alternative to the above measures, it is also possible to perform partial or complete correction according to predetermined set values.

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PA I I N TO V f Claims

Claims (8)

1. Sheet guiding devices for carrying out sheet-to-clock transport in the area of a rotary loader or sheet-finishing machine with: a. a transport roller (1). b. a roll guide (2) of the sheet that is in contact with the conveyor roll (2). wherein the conveying roller (1) and the sheet guiding roller (2) define a roll gap (3) for passing through the sheet. c. a drive for alternately engaging and lifting the sheet guide roll (2); and d. a slave device (8) for adjusting the roll gap (3). characterized by. 2. The method according to claim 1, characterized in that it is provided with a detecting device (9) for generating a signal indicating the compressive force applied by the sheet guiding roller (2) to the sheet. Sheet guiding device according to claim 1, characterized in that. The detecting device (9) comprises a sensor device for generating a sensor signal correlating with the contact force of the sheet guide roll (2). Sheet guiding device according to claim 2, characterized in that. the sensor device is configured to receive timing doscdací force ^(1;) during the engagement phase. Sheet guiding device according to at least one of Claims 1 to 3, characterized by. 2. The method according to claim 1, characterized in that it comprises a plurality of roll guiding rollers (2), said sensor guiding rollers (8) being associated with said roll guiding rollers (2). Sheet guiding device according to at least one of Claims 1 to 4, characterized by. that on the basis of contact forces (E). trapped at each sheet guide roll (2), there is an adjustment of the roll gap (3) defined by the sheet guide roll (2). Sheet guiding device according to at least one of Claims 1 to 5, characterized by. The adjusting device (8) has an adjusting drive which is controlled electronically. Sheet guiding device according to at least one of Claims 1 to 6, characterized in that. A drive device configured to alternately abut the roll (2) of guiding the sheet onto the conveyor roller (I) and lift it away from the conveyor roller (I) is configured as an electric drive (M2) and synchronized by means of a signal with the rotating foot. Sheet guiding device according to at least one of Claims 1 to 8. 7. characterized by. The conveyor roller (1) is connected to a drive device designed as an electric drive (M1). the electric drive being synchronized by means of a signal to the rotation of the rotary machine. • «· ··