DE9214094U1 - Device for supplying compressed air to pneumatic drives connected to moving machine parts - Google Patents

Description

16 October 1992 92-0189 G-fö

Windmöller & Hölscher, 4540 Lengerich/Westf .

Device for supplying compressed air to pneumatic drives connected to moving machine parts

The invention relates to a device for supplying compressed air to pneumatic drives, such as pneumatic cylinders, which are connected to machine parts that can be moved at intervals and/or rotated or pivoted and which return to defined starting and/or intermediate positions, preferably for supplying compressed air to a pneumatic cylinder that moves parts of a bearing that are attached to a rod in a translational manner on swivel plates provided with a rotary drive, and/or to a pneumatic cylinder that moves a cutting knife of a device for winding material webs onto winding shafts with a movable bearing that holds a winding shaft during winding, via which the winding roll that is being formed can be placed on a contact roller and which can be moved into a position away from it for removing the fully wound winding roll, and with a device for inserting a new winding shaft, accelerated to web speed, for example, onto which the beginning of the web formed by a separating cut can be wound is in the movable bearing, where the

The bearings arranged on the swivel plates take over a new winding shaft and, after winding, insert it into the movable bearings that hold it during winding.

A combined contact and central winder known from DE-PS 32 12 960 has a pair of support arms that can be pivoted around the axis of the contact roller and that, in a vertical position, receive a new winding shaft that, after being accelerated to web speed by a pair of friction wheels, is lowered onto the contact roller that rotates at the same peripheral speed to wind the beginning of the web that has been separated by a separating cut. The support arms are then pivoted by about 90° so that the shaft journals of the winding shaft can be inserted into the receptacles of a carriage that moves away from the contact roller in accordance with the growing diameter of the winding roll that is being formed. After the separating cut has been made, the carriage is then moved far enough away from the contact roller that the finished winding roll can be lifted out. The carriage then moves back towards the contact roller so that the support arms can insert the bearing journals of the winding shaft into the receptacles of the carriage. In the known winding device, the winding shaft with the winding roll forming on it rests on the contact roller until the fully wound winding roll has been lifted out of the carriage and the carriage has been moved back into its receiving position close to the contact roller, so that during this time, at the high winding speeds, a winding roll with such a great weight has already formed that the contact pressure can cause damage to the web of material. In particular, if the web to be wound up is thin film, the weight of the winding roll forming can damage this film, leading to rejects.

A preferred device for winding material webs onto winding shafts of the type specified at the beginning is described below with reference to Figs. 1 to 7, in which damage to the web to be wound up during the winding of a new winding shaft is avoided in that the movable bearing is formed by two pairs of holding devices, each pair of which can be moved both synchronously with the other and independently of the other, and the pairs can hold a winding roll together as well as a fully wound winding roll or a winding shaft with a wound web start on their own. In this device, divisible holders or bearings are thus provided for the shaft journals of the winding shaft, which, when moved together, jointly support a winding roll that is being formed and which can be separated and moved apart in such a way that one pair releases the fully wound winding roll for removal, while the other pair moves into the receiving position near the contact roller. The pairs are then brought together again in such a way that the holders of both support the shaft journals of the winding roll that is being formed. Since one pair of the cooperating holders moves the fully wound winding roll, while the other pair of holders moves into its holding position close to the contact roller to hold the new winding shaft, the holders can take over the winding shaft as soon as the new web start has been safely wound onto it. The transfer of the new winding shaft with the wound web start to the holders of one pair of holding devices can therefore take place at a time when only a few turns have been wound and the winding roll has not yet taken on a weight that could damage the wound web.

In the device described with reference to Figs. 1 to 7, the swivel plates provided with a rotary drive are mounted on the shaft journal of the contact roller, whereby the parts of the bearings attached to a rod, which transfer the wound winding shaft to the receptacles of the pair of holding devices, can be moved in a translational manner relative to the swivel plates by a pneumatic cylinder.

In the device described with reference to Figs. 1 to 7, the compressed air must be supplied to the pneumatic cylinder 15 arranged on the swivel plates for raising and lowering the carriage receiving a new winding core and the compressed air supply to the pneumatic cylinder moving the knife 37 through complicated and fault-prone rotary unions.

The object of the invention is therefore to create a device of the type specified at the outset, in which the compressed air can be supplied to the pneumatic drives in a simple manner without the use of rotary unions or other movable supply devices.

The object is achieved according to the invention in a device of the generic type in that the drives are provided with supply lines that have connectors at the end that can be coupled to a stationary compressed air supply line in the starting and/or intermediate positions. The device according to the invention is therefore characterized in that there is no direct connection to an external compressed air source for the pneumatic drives, such as pneumatic cylinders, during the movement of the machine parts carrying them. However, as soon as the machine part moving the drives has reached predetermined end positions or intermediate positions, the connection to the stationary compressed air source is closed again.

manufactured so that the pneumatic actuators can perform their functions.

The device according to the invention can be used whenever compressed air has to be supplied to pneumatic drives that are located on moving or rotating machine parts. Since the connection to the stationary compressed air source always takes place when the moving or pivoting machine part is at a standstill, expensive and complex rotary unions can be dispensed with.

The device according to the invention can be implemented with particular advantage in a device for winding material webs onto winding shafts of the type described with reference to Figs. 1 to 7.

The connecting pieces are expediently funnel-shaped and the line supplying the compressed air is provided with a complementary filling nozzle. When the moving machine part is at a standstill, the filling nozzle is pressed into the funnel-shaped connecting piece to form a seal, so that the connection supplying the compressed air is established. In order to ensure a good connection between the connecting piece and the filling nozzle, the filling nozzle is guided so that it can move, preferably axially.

Now there are also applications in which the pneumatic drives must be put into operation during the movement or pivoting of the machine part supporting them, such as the pneumatic cylinder 15 on the pivot plates 6 of the device described with reference to Figs. 1 to 7. In order to be able to supply pneumatic drives with compressed air even during the movement of the machine part, a particularly advantageous embodiment provides that in the moving

A compressed air reservoir is arranged in the supply line. This compressed air reservoir is filled with compressed air during the temporary standstill of the moving or swiveled machine part through the coupling connection to the compressed air source, whereby standard check valves are arranged in the supply line. The compressed air is usually supplied from the compressed air reservoir to the pneumatic drives by controlled directional valves.

An embodiment of the invention is explained in more detail below with reference to the drawing.

Fig. 1 to 5 Side views of the winding device in

different operating positions,

Fig. 6 a view of the winding device in

Direction of arrows VI-VI in Fig. 4,

Fig. 7 a view of the winding device in

Direction of arrows VII-VII in Fig. 5,

Fig. 8 one of the embodiments shown in Figs. 1 to 7

device corresponding to the device described, which is provided with the compressed air supply according to the invention for the pneumatic cylinders arranged on the swivel plates,

Fig. 9 and 10 a part of the shown in Fig. 8

Winder in front view, where Fig. 10 shows the upper part and Fig. 11 the lower part and

Fig. 11 the one shown in Figs. 9 and 10

Winder part in view according to line IV-IV.

The machine frame of the winding device consists of two side frames 1, which are connected to each other by a crossbeam 2, among other things.

For the sake of clarity, the side frames facing the viewer are not shown in Fig. 1-5. For example, Figure 1 shows a shaft 3 mounted in the two side frames, onto which a contact roller is firmly attached. On both sides next to the contact roller 4, the shaft has a bearing 5 which can rotate freely on the shaft 3. Both a plate and a disk 7 are firmly connected to each of the two bearings 5. The disks 7 are connected to drive disks 9 via toothed belts 8, with a servomotor (not shown) assigned to both drive disks 9.

The plates 6 have projecting parts that carry a freely rotatable guide roller 10. Further freely rotatable guide rollers 11 are arranged on the plates 6 in such a way that they form a guide path for an angled lever 12 assigned to each plate 6. Each of these levers has a holder 13 to which an abutment 14 is assigned. The angled levers can be moved back and forth in the direction of arrow A via a piston-cylinder unit 15.

Each side frame 1 is assigned piston-cylinder units 16 and 17, whereby the piston-cylinder units 17 engage the outer swivel arms 18 and the piston-cylinder units 16 engage the inner swivel arms 19. Both swivel arms are mounted on a shaft 20.

gert, which is held by the side frames 1.

As can be seen from Figures 6 and 7, the shaft 20 is led outwards from the left-hand side frame, with a pulley 21 firmly attached to the left-hand end of the shaft 20. This pulley 21 is connected via the belt 22 to another pulley 23, which sits on a short shaft piece 24. This shaft piece 24 is mounted in a bearing block 25, which is welded to the left outer swivel arm 18 via a holder 26. At the end of the shaft piece 24, which is opposite the pulley 23, the shaft carries a coupling half 27, which in the position shown in Figure 6 is connected to another coupling half 28. This coupling half 28 is part of each winding shaft 29. As indicated for example in Figures 1 and 6, both the outer and the inner pivot arms 18, 19 have receptacles 30 to which movable latches 31 and 32 are assigned.

The function of the winding device is described in more detail below, the structure of which has been explained in principle above:

Figure 1 shows the situation in which a winding roll 33 rests on the side of the contact roller 4 and has the desired number of layers of web material 34. The winding roll 33 is driven by a motor 35, which is only indicated schematically, via the pulley 21, the belt 22 and the pulley 23. It is supported in both the inner and the outer pivot arms 18 and 19. For the purpose of changing the roll, the plate 6 is now pivoted counterclockwise (see arrow direction B) via the drive disks 9 until the plate assumes the position shown in Figure 2.

The material web 34 is partially lifted off the contact roller 4 by the guide roller 10. In the position shown in Figure 2, the holder 13 of the angled lever 12 is located below a winding shaft 36 prepared with adhesive strips, with the angled lever 12 being extended via the piston-cylinder unit 15. In Figure 3, the prepared winding shaft 36 is lowered into the holders 13. The winding shaft 36 then rests in the holders 13 and is held there by the abutments 14. It can be clearly seen that the winding shaft 36 in the position shown in Figure 3 does not yet have any contact with the web 34. At this moment, the winding shaft 36 is accelerated to the speed of the contact roller via a friction wheel drive (not shown) and then lowered onto the contact roller via the angled lever 12. This lowered position can be seen in Figure 4. As soon as the winding roll 33 has reached its predetermined diameter, the web 34 is separated by the knife 37. Due to the adhesive strips on the new winding shaft 36, the beginning of the web 34 adheres to the new winding shaft and is wound onto it. Immediately afterwards, the fully wound roll 33, which is held by both holders 30 of the pivoting arms 18 and 19, is transferred to the inner pivoting arm pair 19. For this purpose, the latch 31 of the outer pivoting arm pair assigned to the holder 30 moves in and thus releases the roll. Then the inner swivel arm pair 19, driven by the piston-cylinder unit 16, moves outwards, and at the same time the outer swivel arm pair 18, driven by the piston-cylinder unit 17, moves inwards towards the contact roller 4. Also simultaneously with the swivel movements of the swivel arm pairs, the plate 6 swivels from the position shown in Figure 4 with the new winding shaft 36 into the position shown in Figure 5, whereby during the swivel movement the new winding shaft 36 slides into the receptacles 30 of the two outer swivel arms.

arms 18. The winding shaft 36, which was still driven by the contact roller 4 during its pivoting movement from the position shown in Figure 4 according to Figure 5, can now be wound further in the desired winding process.

The inventive further development of the device according to Figs. 1 to 7 will now be described with reference to Figs. 8 to 11.

Fig. 8 shows one of the two side frames 1 arranged parallel to one another, in which pivotable outer and inner pivot arms 104, 105 are mounted via piston-cylinder units 102 and 103. These pivot arms 104, 105 accommodate the winding roll 106, which can be driven by a motor 107. A contact roller 108 is assigned to the winding roll 106. This contact roller is rotatably and drivably mounted on pins 109, which are attached to the side frames 101. Plates 111 are rotatably mounted on the pin 109 via ball bearings 110, with toothed belt pulleys 112 being provided for the purpose of rotating the plates 111, which are connected to a drive pulley 114 via a toothed belt 113.

In particular, it can be seen from Figure 11 that the plates 111 have the guide rollers 115 between which a carriage 116 is guided. For the purpose of moving this carriage 116, a piston-cylinder unit 117 is provided, the cylinder 118 of which is connected to the plate 111 and the piston rod 119 of which is connected to a receiving head 120. The latter is firmly screwed to the carriage 116. The receiving head 120 is assigned an abutment 121 so that a winding shaft to be inserted into the receiving head 120 does not roll off the receiving head, but rather rests on the abutment 121. The receiving head has locking means which prevent an inserted winding shaft from accidentally falling out when the plate 111 is rotated.

These locking devices are not shown and are familiar to every expert.

In the position shown in Figure 8, the carriage 116 has moved to its upper position via the piston-cylinder unit 117 and is ready to receive a new winding shaft 122. The supplied web material 123 runs via a guide roller 124 first to the winding roll 106. In the immediate area next to the guide roller 124 there is a piston rod-less cylinder 125 (Origa cylinder) which has a slot in the cylinder over its entire length. A knife 126 connected to the piston protrudes through this slot so that the web 123 can be cut through by this when the cylinder is pressurized with air. The Origa cylinder is longer than the width of the material web 123 so that when it is at rest the knife 126 is located to the side of the web 123. To operate the Origa cylinder, it is connected to a nozzle 128 via a line 127. A filling nozzle 129 can be inserted into the nozzle 128, through which compressed air can reach the Origa cylinder 125.

The filling nozzle 129 is connected to a compressed air source (not shown). To cut the web 123, the winding shaft 122 must be lowered in the receptacles 120 by the piston-cylinder units 117. This is done indirectly by the filling nozzle 129, which is moved into the nozzle 128 for the purpose of filling the cylinder 125, whereby a control valve is actuated, which in turn actuates the valve 130. This valve allows the piston-cylinder unit 117 to retract and lower the winding shaft 122 onto the contact roller 108 and the film 123. Cutting is done by filling the cylinder 125 through a valve connected upstream of the filling nozzle 129. After the web 123 has been cut by the knife 126, the web 123 is fed to the new

Winding shaft 122 is wound up. As soon as the winding process has taken place on the new winding shaft 122, the plate is rotated so far that the new winding shaft can be placed by the receiving head 120 into the outer swivel arms, whereby these swivel arms are swiveled into the area of the contact roller 101 via the piston-cylinder unit 102, as can be seen in Fig. 5. As soon as the transfer has taken place, the carriage 116 must be moved further in by the piston-cylinder unit 117 in order to avoid collisions between the head 120 and the swivel arms 104, 105 into which the newly wound winding shaft 122 is placed. To do this, the locking means of the receiving head 120 must be mechanically unlocked by the outer pair of swivel arms. The compressed air required for retraction is supplied to the piston-cylinder unit 117 via a control valve 130 from an air storage tank 131 that is attached to the plate 111. This air tank 131 is connected to a filling valve 133 via a line 132. As soon as the plate 111 has been rotated so far that it assumes the position shown in Fig. 1, the filling valve 133 is located directly in front of the filling nozzle 129, so that the air storage tank 131 can be recharged via this. Shortly before the plate 111 has reached the position shown in Fig. 1, the valve 130 is actuated by a control valve that is actuated by the rotational movement of the plate 111. This extends the piston rod of the piston-cylinder unit 117 until the receiving head 120 reaches the position shown in Fig. 11.

The filling nozzle 128 associated with the Origa cylinder 125 does not need to be connected to an air storage tank, since the Origa cylinder is actuated while the plate 111 is at a standstill, and always in one and the same position, namely in which the filling nozzle 128 is located exactly in front of the filling nozzle 129.

The invention makes it possible to dispense with screw caps that are prone to failure for the compressed air supply to the Origa cylinder and the piston-cylinder unit of the slide. Instead, only an axially movable filling nozzle is provided, through which, depending on the position of the plate 111, air can be fed either to the Origa cylinder or to the air storage tank 131, whereby the piston-cylinder unit for actuating the slide 116 can be supplied with compressed air from the air storage tank 131.

Claims (4)

16 October 1992 92-0189 G-fö Windmöller & Holscher, 4540 Lengerich/Westf. Device for supplying compressed air to pneumatic drives that are connected to moving machine parts Protection claims: 1. Device for supplying compressed air to pneumatic drives, such as pneumatic cylinders, which are connected to machine parts that can be moved at intervals and/or rotated or swiveled and that return to defined starting and/or intermediate positions preferably for supplying compressed air to a pneumatic cylinder (15, 117) of the parts of a bearing (13, 120) which are attached to a rod (12, 116), moved translationally on pivot plates (6, 111) provided with a rotary drive, and/or to a pneumatic cylinder (25) moving a cutting blade (37, 126) of a device in which the bearings (13, 14; 120, 121) arranged on the pivot plates (6, 111) have a take over the new winding shaft and, after winding, insert it into the movable bearings that hold it during winding, characterized that the drives (117, 125) are provided with supply lines (127, 132) which have connecting pieces (128, 133) at the end, which can be coupled to a stationary compressed air supply line (29) in the starting and/or intermediate positions. 2. Device according to claim 1, characterized in that the connecting pieces (28, 33) are funnel-shaped and that the line supplying the compressed air is provided with a complementary filling nozzle (29). 3. Device according to claim 1 or 2, characterized in that the filling nozzle (29) is guided so as to be movable, preferably axially displaceable. 4. Device according to one of claims 1 to 3, characterized in that a compressed air reservoir (31) is arranged in the supply line (32).