NO335556B1 - Winding device for printing paper - Google Patents

Abstract

A printing paper winding device expands the range of types of bottom material that can be wound, the device also enabling the winding of printing paper of a bottom material having a low resistance to bending stresses or printing paper bearing RFID tags with IC chips. Bending stresses can be reduced by dividing the range of motion of the tensioner roller into four regions, thereby enabling a successive detection of the position or position of the tensioner roller so that the bending angle of the printing paper in the winding web can be brought closer to a more blunt angle. The winding control unit according to the invention which determines whether the tightening region where the tensioner roller is placed is a first tightening region, a second tightening region, a third tightening region or a fourth tightening region, controls the drive unit so that the tensioning roller is limited to a tightening area where a winding angle for the printing paper in the winding web is possible. , is close to a more blunt angle.

Description

The present invention relates to a winding device for printing paper, more particularly a winding device for printing paper arranged separately from a printer for printing paper.

Some conventional printing paper winding devices are designed as external devices separate from a printer. Such devices are mounted at the paper outlet opening in a printer and are used to successively wind a continuous strip of paper or printing paper (including base paper with removable labels) that has been printed in the printer and fed out from it.

Such a winding device includes a winding shaft for winding up tape-like printing paper which is supplied with pressure in a printer, a drive unit (for example a drive motor for rotary drive influence of the winding shaft) and a tension roller which is in contact with the printing paper upstream of the winding shaft.

The tension roller reciprocates in a specific tension area in contact with the printing paper, so that it can exert a tensioning effect on the printing paper from the printer during winding, thereby taking up slack in the printing paper and stabilizing the winding tension on the winding shaft.

In such a winding device, the front end of the ribbon-like printing paper coming from a printer is usually attached to the winding shaft. The tension roller is brought into a position for contact with the printing paper and the drive unit starts so that the winding of the printing paper can begin.

The drive unit is ON/OFF controlled. The winding speed is constant and the winding path of the printing paper assumes a zigzag shape, as the tension roller can reciprocate in a specific path during the winding of the printing paper. As a result, the winding will be associated with bending stresses or bending stresses and this sets limits for the base paper of the printing paper. Large bending stresses occur in the zone where the winding path is deflected at an acute angle. This results in the printing paper being torn off or the labels, which are attached to the base paper, coming loose.

When the printing paper is of the type that carries tags (RFID tags) with IC chips for remote writing and remote reading of data, the RFID tag may come loose or the IC chip is destroyed when the printing paper, i.e. the winding path is bent at a very sharp angle.

The previously described winding device for printing paper is controlled together with a printer by means of a printer control unit and separate control of the winding device is therefore not possible, with the exception of special printer systems. The device cannot therefore be set for suitable winding of printing paper that has been printed on and delivered from an arbitrary printer, and thus lacks a more general applicability with regard to a combination with printers.

Reference should be made to EP 1044915 and EP 1479628 as examples of the state of the art.

The present invention aims to solve the aforementioned problems, and it is therefore a purpose of the invention to provide a winding device for printing paper which can also wind up printing paper where the base material has a low resistance to bending stresses.

Another purpose of the invention is to provide a winding device for printing paper which can also wind up printing paper with RFID tags with IC chips.

Another purpose of the invention is to provide a winding device for printing paper which can also wind up printing paper which has low resistance with regard to winding pressure or bending stresses.

Another purpose of the invention is to provide a winding device for printing paper which can enable the use of a larger range of base material types that are suitable for winding.

Another purpose of the invention is to provide a winding device for printing paper which can be controlled independently and can suitably wind up printing paper which is provided with printing and delivered from any printer.

The present invention is based on the possibility of reducing bending stresses by dividing the tension roller's range of motion into four areas to thereby enable a successive detection of the position or position of the tension roller and achieve a more obtuse bending angle for the printing paper in the winding path. The invention therefore provides a winding device for printing paper including a winding shaft for winding ribbon-like printing paper which is supplied with pressure in a printer, a drive unit for rotary operation of the winding shaft and a tension roller which is in contact with the printing paper upstream of the winding shaft and which can tension the printing paper by can reciprocate in a specific tension area during the winding of the printing paper. This winding device for printing paper further includes a first sensor and a second sensor which can detect the part of the tensioning area where the tensioning roller is positioned and a winding control unit for determining, based on the output signals from the first and second sensors, whether the tensioning area where the tensioning roller is positioned is a first tightening area where the bending angle of the printing paper's winding path is a minimum, a second tightening area, a third tightening area or a fourth tightening area where the bending angle of the printing paper's winding path is a maximum. These tightening areas are arranged continuously and follow each other. The winding control unit controls the drive unit so that the tension roller is limited to the tensioning area where the winding can be carried out in such a way that the bending angle of the printing paper's winding path will be close to a more obtuse angle.

The winding control unit can control the tensioning area where the tensioning roller is positioned, so that thereby this tensioning area is brought closer to the fourth tensioning area.

A dip switch can be arranged for selecting the tensioning area where the tensioning roller is to be placed and the winding control unit can control the tensioning area where the tensioning roller is located, in accordance with the setting conditions provided by the dip switch.

Furthermore, there can be arranged a first fixed guide roller which is placed upstream of the tension roller for guiding and introducing the printing paper from the printer into the winding device and a second fixed guide roller for guiding the printing paper from the tension roller onto the winding shaft. The control can be carried out so that the bending angle of the printing paper's winding path, which bending angle is determined by the first fixed guide roller and the tension roller, is close to a more obtuse angle, that the bending angle of the printing paper's winding path formed by the first fixed guide roller, the tension roller and the second fixed guide roller lies close to a more obtuse angle and that the bending angle of the printing paper winding path as determined by the tension roller, the second fixed guide roll and the winding axis lies close to a more obtuse angle.

The printing paper can have a label where an IC chip is placed for remote writing and remote reading of data.

A roller arm can be arranged for holding the tension roller. The roller arm is assigned to a rotatable shaft and can move the tension roller back and forth across the winding path. A sensor plate is rotatable with the rotatable shaft and is provided with alternating detection projections and recesses that can be detected by the first sensor and by the second sensor.

The winding control unit can control the winding device for printing paper independently of the printer control unit used for the printer where the paper is supplied with print.

After the tension roller is placed in the fourth tension area and an initial setting for the winding has been carried out, the tension roller will move in the direction of the first tension area when the printing paper is printed and delivered from printers. At the time when the winding path has its maximum length (in other words, at the time when the bending angle of the winding path reaches a minimum), winding is started. At the time when the tension roller has reached the fourth tension area (in other words, the time when the bending angle of the winding path is maximum), winding is stopped and the system then awaits printing and delivery of the printing paper from the printer. The operations described above are then repeated.

In a case where the printing paper has a normal bending strength, the control is preferably carried out so that the tension roller reciprocates in areas other than the first and fourth tension areas, i.e. the intermediate second and third tension areas, thereby providing a margin for the tension roller's reciprocating movement.

However, if printing paper with low bending strength or printing paper that carries RFID tags is used, the control is preferably carried out so that the tension roller is reciprocated as close to the fourth tension area as possible.

In the winding device for printing paper according to the present invention, the movement area of the tension roller is divided into four areas, namely a first tension area, a second tension area, a third tension area and a fourth tension area, in which the position of the tension roller can be determined. In the case of a printing paper which has a poor resistance to bending stresses, the control of the drive unit is carried out so that the bending angle in the winding path as determined by the current roll is close to a more obtuse angle. This prevents the bending angle of the printing paper from becoming too sharp. The bending stresses can thereby be reduced and the range of suitable printing paper types expanded. Printing paper with releasably attached RFID tags can also be rolled up in the right way, avoiding the RFID tags becoming detached.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic side view of a winding device 2 for printing paper according to the invention and of a printer 1 which is connected to the winding device 2; Figure 2 is a perspective view of the winding device 2 for printing paper; Figure 3 is a side view of a section of a vertical wall 1 IA, seen from the side opposite to that where the tension roller 13 is located; Figure 4 is a table showing tension areas for the tension roller 13, which areas are assigned detection signals from the first sensor 24 and second sensor 25; Figure 5 is a sketch that schematically shows the individual tightening areas; Figure 6 is a plan view showing a continuous body 40 (printing paper) with RFID tags; Figure 7 is a slightly enlarged side view of the tensioning roller 13 and the winding unit 15 and shows a position of the tensioning roller in a first tensioning area RI; and Figure 8 is a somewhat enlarged side view showing the tension roller 13 and the winding unit 15 in a state in which the tension roller is located in the fourth tension region R4.

In accordance with the invention, the drive unit is controlled so that the tensioning roller is limited to a tensioning area where the winding can be carried out in such a way that the bending angle of the printing paper's winding path is close to a more obtuse angle. In this way, a winding device for printing paper can be realized which is also suitable for winding printing paper which has a low resistance to bending stresses.

The winding device 2 for printing paper according to the invention will now be described below with reference to figures 1 to 8.

Figure 1 is a schematic side view of a printer 1 and a winding device 2 connected to it for the printing paper. The printer 1 has a storage unit 4 for a printing paper 3 with labels or the like, a detector 5 for detecting the position of the printing paper 3, a printing unit 6 for printing the printing paper 3, a cutting unit 7 for cutting the end part of the printed printing paper 3 after that it is wound up in the winding device 2 and a printer control unit 8 for controlling the aforementioned units.

The printing unit has a heating head 9 and a plate roll 10. The printing paper 3 passes between the heating head 9 and the plate roll 10 and the printing paper 3 is delivered and transported towards the winding device 2 by the plate roll 10 rotating. The printing paper 3 now has the predetermined printed information.

The cutting unit 7 can be operated by the printer control unit 8 for mechanical cutting of the printing paper 3 or can include an element for manual cutting of the printing paper 3's end sections.

Figure 2 is a perspective view of the winding device 2. The winding device 2 includes a housing 11, a first fixed guide roller 12 for guiding and introducing the printing paper 3 into the winding device 2, a tension roller 13, a second fixed guide roller 14 for guiding the printing paper 3 from the tension roller 13 , a winding unit 15 for winding the printing paper 3 into a roll form, a control unit 16, a power source switch 17 and a winding control unit 18.

A rotatable shaft 19 is stored in the housing 11's vertical wall section 1 IA. A roller arm 20 which can move in both forward and backward directions is mounted on the rotatable shaft 19. The tension roller 13 is rotatably mounted on the distal end section of the roller arm 20 and the tension roller 13 is positioned so that it runs across the winding path 21 (for example shown like a zigzag line in figure 1) at a right angle relative to the printing paper 3.

The tension roller 13 can reciprocate up and down along a circular arc as shown by the arrows in Figure 1. The movement is controlled by a circular arc-shaped guide track 22 in the vertical wall section 1 IA. When the tension roller 13 is moved, the length of the winding path 21 changes from a minimum to a maximum and correspondingly the bending angle of the winding path 21 will go from a maximum to a minimum.

Figure 3 is a side view of the vertical wall section 1 IA, seen from the opposite side of where the tension roller 13 is located. The position of the tension roller 13 can be detected with a sensor plate 23, a first sensor 24 and a second sensor 25.

The sensor plate 23 is mounted on the rotatable shaft 19 and can rotate together with the tension roller 13 with the rotatable shaft 19. Two detection projections (a first detection projection 26 and a second detection projection 27) and three detection recesses (a first detection recess 28, a second detection recess 29 and a third detection recess 30) which can be detected with the first sensor 24 and with the second sensor 25, is designed alternately on the circumference of the sensor plate 23.

Detectors of the transmission type or the reflection type can be used for the first sensor 24 and the second sensor 25 and they are arranged along the circumference so that detection of the first detection projection 26, the second detection projection 27, the first detection recess 28, the second detection recess 29 is thereby made possible. and the third detection recess 30.

In the lowest position (bottom dead center, first tension area) of the tension roller 13, as shown with a fully extended line in Figure 3, the first sensor 24 is located at the second detection recess 29 while the second sensor 25 is located at the third detection recess 30.

The rotatable shaft 19 is preferably arranged above (in the vertical direction) the tension roller 13, and depending on the mutual interaction, the tension roller 13 can take a natural position determined by gravity in which the tension roller 13 is at the bottom (in the vertical direction) of the circular arc-shaped guide track 22. In this way can the tension roller 13 constantly give a certain tension to the printing paper 3 which comes into contact with the tension roller 13 from above, as shown in figures 1 and 2.

If necessary, the tension roller 13 can be constantly influenced against the bottom section (bottom dead center) in the circular guide track 22 by means of a tension spring 31 (figure 1) which acts on the roller arm 20.

Figure 4 is a table showing tension areas where the tension roller 13 can be placed. These areas are assigned detection signals from the first and second sensors 24, 25. Figure 5 is a drawing which schematically shows each individual tightening area.

The condition shown in Figure 3 with solid lines shows the lower dead center 13 (lowest point in the first tightening area RI). In such a state, the first sensor 24 will detect the position of the second detection recess 29 while the second sensor 25 detects the position of the third detection recess 30.

When the tension roller 13 rises in the circular arc-shaped guide groove 22, the first sensor 24 and the second sensor 25 will detect the first detection projection 26, the second detection projection 27, the first detection recess 28, the second detection recess 29 and the third detection recess 30 and based on the corresponding detection signals, the winding control unit 18 will determine which tensioning area (first tensioning area RI, second tensioning area R2, third tensioning area R3 and fourth tensioning area R4, arranged continuously and one after the other) the tensioning roller 13 is located in.

The detection time for the tightening areas (border areas between the first, second, third and fourth tightening areas RI, R2, R3 and R4 respectively) for the tensioning roller 13 can be set by suitable determination of the angular areas of the first detection protrusion 26, the second detection protrusion 27 respectively , the first detection recess 28, the second detection recess 29 and the third detection recess 30, that is, the angular ranges for the sensor plate 23 about the rotatable shaft 19 and when setting the relative positions of the first and second sensors 24 and 25.

As shown in Figures 1 and 2, the winding unit 15 has a drive motor (drive unit) 32, a winding shaft 33 which is driven by the drive motor 32, a winding core 34 which is releasably arranged on the winding shaft 33 for rotation together with this winding of the printing paper 3 in a roll shape and a pair of plate-shaped paper guides 35 which are arranged at both ends of the winding core 34 and serve to guide or guide the printing paper 3.

The control unit 16 is arranged in the housing 11 near the winding unit 15.

The control unit has a start-stop button 36 for starting and stopping the winding shaft 33's rotational movement. Furthermore, the control unit has a status display unit 37 including an LED which indicates the operating position of the start-stop button 36. Furthermore, there is a display unit 38 for the winding direction. This display unit 38 thus indicates the winding direction of the printing paper 3 with an arrow.

When the start-stop button 36 is pressed and the winding of the printing paper 3 takes place, the status display unit 37 is activated and when the winding is stopped, the status display unit 37 is switched off.

The winding direction display unit 38 shows the winding of the printing paper 3. The printing paper 3 may be in the form of a continuous label strip or paper without an adhesive surface or it may be in the form of a continuous body in which a number of labels 3B are releasably attached to a tape-like base paper 3A, as that can be seen, for example, in Figure 2. When such a label-carrying body is used, a winding where the labels 3B lie on the inside (the back) of a roll on the winding shaft 33 (winding core 34) will be referred to as a backside winding, while a winding where the labels lie on the outside is called an outside winding. The two placement options are indicated in the display unit 38.

The energy source switch 17 serves to switch on and off the energy source for the winding device 2. Even if the energy source switch 17 is in its ON position, the drive motor 32 (drive unit) will not be activated and the winding of the printing paper 3 has therefore not yet started.

The winding control unit 18 controls the winding unit 15 and the control unit 16 located on the detection signals from the first and second sensors 24 and 25, that is to say that the control is based on the tightening area (RI, R2, R3 or R4) where the tensioning roller 13 is positioned and will control the winding device 2 independently of control signals from the printer control unit 8 (figure 1) in the printer 1, i.e. independently of the printer control unit 8.

When using a winding device 2 and a printer 1 of the type shown, the winding device 2 for the printing paper is placed at the printer 1. The printing paper 3 is fed out from the printer 1 and placed over the first fixed guide roller 12, over the tension roller 13 and over the second fixed guide roller 14 in the winding device 2, as shown in figures 1 or 2. The front end part of the printing paper 3 is attached to the winding core 34 on the winding shaft 33 and the energy source switch 17 is switched on.

When the printing paper 3 is in a slack state and the tension roller 13 is at the lowest position (bottom dead center, first tensioning area RI) with the printing paper 3 arranged in the winding path 21, the winding control unit 18 checks that the tensioning roller 13 is in the first tensioning area RI when the winding of the printing paper 3 on the winding shaft 33 (winding core 34) starts. In such a situation, the operator will continuously actuate the start-stop button 36 and as long as the signal continues, the winding shaft 33 will be driven by the drive unit (drive motor 32) at a speed which is lower than the normal winding speed. The winding of the printing paper 3 on the winding shaft 3 is temporarily stopped and the original state is assumed at the time when the tension roller reaches the fourth tension area R4 (more precisely the time when the tension roller reaches the border between the third and fourth tension areas R3 and R4).

The usual winding speed in the winding device 2 is set higher than the speed at which printing and dispensing of the printing paper 3 in/from the printer 1 takes place.

At the time when there is a transition from the first tightening area RI to the second tightening area R2 and the third tightening area R3, the winding speed can be increased so that the start and winding can thereby take place at a high speed.

It is understood that, depending on the initial setting made by the operator, the tension roller 13 may be in a different tension range than the first tension range RI, but in such a case the winding control unit 18 will also determine which tension range the tension roller 13 is in, in the same way as described above. The winding shaft 33 is driven at a speed lower than the normal winding speed as long as the signal is delivered from the start-stop button 36 and the winding of the printing paper 3 on the winding shaft 33 is temporarily stopped to achieve the original set state at the time when the tension roller 13 reaches the fourth tension area R4 .

At the time when such an initial state is provided, the tension roller 13 will be in the fourth tension region R4. The printer 1 is started in this state and when the printing paper 3 is delivered in a printed state, the tension roller 13 will go from the fourth tensioning area R4 via the third tensioning area R3 along the circular arc-shaped guide track 22 in the direction of the second tensioning area RI and the first tensioning area RI, maintaining the determined tight contact with the printing paper 3 in the winding path 21.

When the tension roller 3 descends and reaches the first tension region RI (more precisely, the time when the tension roller reaches the boundary between the second tension region R2 and the first tension region RI), the winding of the printing paper 3 on the winding shaft 33 begins again. The tensioning roller 13 goes up in the circular arc-shaped guide 22 and moves through the second tensioning area R2 and the third tensioning area R3 and reaches the fourth tensioning area R4 again, whereby the winding is stopped. In this stop state, the system waits for more printed paper 3 from the printer 1. As soon as this happens, the winding starts again as described above, at the time when the tension roller 13 reaches the first tension area RI.

The winding can be terminated by using the start-stop button 36 in the control unit 16.

In a normal winding, the first tensioning area RI and the fourth tensioning area R4 can be seen as the marginal area to ensure that the tensioning roller 13 reciprocates within the second and third tensioning areas R2 and R3.

In this way, the operator can carry out the winding with the original setting at a speed which is lower than the usual winding speed, by simply continuing to influence the start-stop button 36 in the control unit 16. At the time when there is an initial setting for the printing paper 3, thus the movement of the printing paper 3 is started as desired and the winding can take place in a simple and safe way.

The present invention is particularly advantageous when a printing paper 3 which has a low resistance to bending stresses is to be wound. In contrast to the usual windings described earlier, the winding unit 15 or the drive motor 32 can be controlled so as to limit the tensioning area of the tensioning roller 13 to a predetermined area.

A description of the invention will be given below, where an RFID tag-carrying continuous body which has a low resistance to bending stresses is used as printing paper.

Figure 6 shows a plan of a continuous body 40 (printing paper) provided with RFID tags. The continuous body 40 includes a tape-like base paper 41 and a number of RFID tags 42 releasably attached to the base paper 41.

The RFID tag 42 (Radio Frequency Identification label) has a tag body 43, an IC chip 44 in the tag body 43 and an antenna 45. The IC chip 44 can read and write data with an external data writing/reading device (not shown in the figure) via a antenna 45 and data can be written electronically into the IC chip 44 and read out from it.

The parts of the continuous body 40 where the RFID tags 42 are placed have a particularly low resistance to bending stresses. Figure 7 is a somewhat enlarged side view showing the tension roller 13 and the drive unit 15. The figure shows a state where the tension roller 13 is located in the first tension area RI.

When, as shown in figure 7, the tensioning roller 13 is placed in the first tensioning area RI, the bending angle of the body 40's winding path 21 will be at a minimum. More specifically, the first bending angle 61, the second bending angle 62 and the third bending angle 63 will be at a minimum and in the state where the tensioning roller is in the first tensioning area RI, the bending stresses will be maximum.

The first bending angle 01 is the bending angle of the winding path 21 which is determined by the printer 1, the first fixed guide roller 12 and the tension roller 13.

The second bending angle 62 is the bending angle of the winding web 21 which is determined by the first fixed guide roller 12, the tension roller 13 and the second fixed guide roller 14.

The third bending angle 63 is the bending angle for the angling path 21 which is determined by the tension roller 13, the second fixed guide roller 14 and the angling shaft 33.

In the area of the tension roller 13, the second bending angle 62 for the printing paper 3 will be sharper and the impact of bending stresses on the RFID tag-carrying continuous body 40 will be maximized.

Figure 8 shows a somewhat enlarged side view which includes the tensioning roller 13 and the angling unit 15. The figure corresponds to Figure 7, but shows a state where the tensioning roller 13 is now placed in the fourth tensioning area R4.

In the state shown in Figure 8, the first bending angle 61, the second bending angle 62 and the third bending angle 63 will be at their maximum values. The tensioning roller is located in the fourth tensioning area R4 and the bending stresses are therefore kept to a minimum.

In accordance with the invention, the control is carried out so that the first bending angle 61, the second bending angle 62 and the third bending angle 63 become more obtuse when the tensioning roller 13 approaches the fourth tensioning area R4.

A dip switch 46 is arranged in the housing 11 (figures 1 and 2). With the help of this switch 46, the tightening range for the tensioning roller 13 can be selected.

When a printing paper 3 is wound up, the winding control unit 18 will control the drive motor 32 so that the tensioning roller 13 will reciprocate in the second and third tensioning areas R2 and R3 (more precisely between the boundary between the first tensioning area RI and the second tensioning area R2, respectively between the third tensioning area R3 and the fourth tensioning area R4), but when it concerns a continuous body 40 provided with RFID tags, the drive motor 32 is controlled on and off so that the tensioning roller 13 reciprocates from the second tensioning area R2 and to the fourth tensioning area R4 (more precisely the the upper part of the upper dead center of the fourth tightening area R4) or from the third tightening area R3 to the fourth tightening area R4 (more precisely the upper part or the upper dead center of the fourth tightening area R4).

For example, in a case where the tension roller 13 reciprocates between the third and fourth tension areas R3 and R4, the winding control unit 18 will influence the drive motor 32 and start the winding of the continuous RFID tag carrying body 40 when the tension roller 13 reaches the third tension area R3 (more precisely the border between the second and third tightening areas R2 and R3) and when the top dead center in the fourth tightening area R4 is reached, the drive motor 32 will be switched off and a state of waiting for further feeding of the continuous body 40 with the RFID tags from the printer 1 is assumed.

In this way, the drive motor 32 is controlled so that the tensioning roller 13 is held in a tensioning area which enables a winding in such a way that the bending angle of the winding path 21, where the continuous body 40 with the RFID tags goes, becomes closer to a more obtuse angle. In such a case, the continuous body 40 with the RFID tags will be subjected to a bending by the first fixed guide roller 12, the tension roller 13 and the second fixed guide roller 14 in such a way that the tags 42 and the like are prevented from breaking or coming loose accidentally.

At small bending angles, as shown in Figure 7, particularly at the first fixed guide roller 12 and the second fixed guide roller 14, the RFID tags 42 will not follow the bending movement of the base paper 41 and may thereby detach from the base paper 41 (indicated in Figure 7 at 42) , and such peeling of the RFID tags 42 can be avoided by increasing the bending angle so that it becomes more obtuse, as shown in figure 8.

Claims (7)

1. Printing paper winding device for winding printing paper with a base material having a low resistance to bending stress or printing paper having RFID tags with IC chips, including: a winding shaft (33) for winding ribbon-like printing paper (3, 40) which has been printed in a printer (1); a drive unit (32) for rotary operation of the winding shaft (33); and a tension roller (13) which is in contact with the printing paper (3, 40) upstream of the winding shaft (33) and can exert a tensioning effect on the printing paper (3, 40) by reciprocating in a certain tensioning area (RI, R2, R3, R4) during the winding of the printing paper, which winding device (2) further includes: at least a first sensor (24) and a second sensor (25) which can detect the part of the tensioning area (RI, R2, R3, R4) where the tensioning roller (13) is positioned ; and a winding control unit (18) for determining, based on the output signals from the first sensor (24) and the second sensor (25), whether the tightening area (RI, R2, R3, R4) where the tensioning roller (13) is positioned is a first tightening area (RI) where the bending angle of the printing paper's winding path (21) is a minimum, a second tightening area (R2), a third tightening area (R3) or a fourth tightening area (R4) where said bending angle is a maximum, the winding control unit (18) controls the drive unit (32) to limit the tension roller (13) to the tension area (RI, R2, R3, R4) where the winding can be carried out so that the bending angle of the winding path (21) for the printing paper (3, 40) lies closer to a more obtuse angle thereby reducing bending stresses. 2. Winding device for printing paper according to claim 1, characterized in that the winding control unit (18) controls the tensioning area (RI, R2, R3, R4) where the tensioning roller (13) is positioned so that the tensioning area (RI, R2, R3, R4) is closer to the aforementioned fourth tensioning area (R4). 3. Winding device for printing paper according to at least one of claims 1 to 2, characterized in that it includes a dip switch (46) for selecting the tensioning area (RI, R2, R3, R4) where the tensioning roller (13) is positioned, the winding control unit (18) can control the tensioning area (RI, R2, R3, R4) where the tensioning roller (13) is positioned in accordance with setting conditions that are set using the dip switch (46). 4. Winding device for printing paper according to at least one of claims 1 to 3, characterized in that it includes: a first fixed guide roller (12) placed upstream of the tension roller (13) for guiding and introducing the printing paper (3, 40) from the printer (1) and into the winding device (2) for the printing paper and a second fixed guide roller (14) for guiding the printing paper (3, 40) from the tension roller (13) and onto the winding shaft (33), the steering being such that the aforementioned bending angle of the printing paper (3, 40) winding path (21) which is determined by the printer (1), the first fixed guide roller (12) and the tension roller (13), is brought close to a more obtuse angle, the bending angle of the printing paper (3, 40) winding path (21) which is determined by the the first fixed guide roller (12), the tension roller and the second fixed guide roller are brought closer to a more obtuse angle, and the bending angle of the winding path (21) of the printing paper (3) determined by the tension roller (13), the second fixed guide roller (14) and winding scissors elen (33), is brought closer to a more obtuse angle. 5. Winding device for printing paper according to at least one of claims 1 to 4, characterized in that the printing paper (40) carries a label (42) with an IC chip (44) where data can be remotely read and remotely written. 6. Winding device for printing paper according to at least one of claims 1 to 5, characterized in that it includes: a roller arm (20) for carrying the tension roller (13); a rotatable shaft (19) for supporting the roller arm (20) so that the tension roller (13) can be moved back and forth across the winding path (21); and a sensor plate (23) rotatable by the rotatable shaft and having alternating detection projections (26, 27) and recesses (28, 29, 30) detectable by the first sensor (24) and the second sensor (25). 7. Winding device for printing paper according to at least one of claims 1 to 6, characterized in that the winding control unit (18) controls the winding device (2) independently of the printer control unit (8) to the printer (1) which is used to deliver print on the printing paper (3, 40) .