EP0688611B1 - Device for greasing strips or plates, comprising quickly interchangeable greasing rollers - Google Patents

Abstract

The bearing blocks (14-17) for the greasing rollers (11,12) and the springs (21) at both ends of the rollers, are located in rows on common column-like shafts (19). Locking devices (25) retain blocks and springs in these positions. They are moved away or towards each other due to spring action. The shafts are positioned vertically on a baseplate (23) or on a block-shaped collection tank. The locking unit consists of a plate with key-hole-shaped apertures. These are pushed over the ends of the shafts, and locked in positioned by a locking device.

Description

The invention relates to a device for greasing workpieces in strip or plate form with a plurality of hollow greasing rollers provided with fat-permeable material, which are each rotatably supported on both ends of a hollow shaft in a bearing block which concentrically engages on at least one columnar shaft under the action of one Coil spring is movable.

In a device of this type according to DE-GM 93 04 899, each bearing block is elastically supported at each end of two greasing rollers arranged one above the other on two column-like shafts with corresponding helical springs. The shanks are held on a base plate which can be adjusted in the direction of the workpiece surface via pressure medium cylinders and guides. To replace the greasing rollers, either their hollow axles must be removed from each bearing block at each end or each of the two base plates removed from the pressure medium cylinders and the guides and replaced with another pressure base plate with a new greasing roller.

Although this arrangement has proven itself in practice, difficulties arise when the users work with different lubricants. It is assumed that one that has already been put into operation with a certain lubricant The roller cannot and should not be operated with another lubricant. In this case, the greasing rollers have to be replaced, but this requires a relatively large amount of assembly and time.

This applies to an even greater extent if, according to a device of the same type according to DE 41 05 364 C1, at least one row of individually mounted greasing rollers, which can be attached to the facing workpiece surface at the same time or at different times, are required in a device frame above and below the path of the workpiece.

Starting from this prior art, the invention has for its object to provide a device of the type mentioned, in which the greasing rollers can be replaced as quickly as possible and with little assembly effort against other greasing rollers.

This object is achieved in connection with the generic term mentioned at the outset in that the bearing blocks with the springs at both ends of the greasing rollers are lined up on common columnar shafts, are held in this arrangement by a locking device and can be moved towards one another either counter to or under the action of the springs .

With this arrangement it is possible, after the locking device has been released, to remove the greasing rollers with their bearing blocks and the springs, like pearls on a cord, from the columnar shafts to replace the greasing rollers with their pedestals by new greasing rollers with new pedestals. Depending on the type and scope of the device, such a process requires a period of a few seconds to a few minutes.

In this case, the alignment of the bearing blocks and the springs in a first embodiment can take place in such a way that the springs are arranged between the bearing blocks on the columnar shafts. In this case, the greasing rollers for greasing the workpieces must be moved towards each other against the action of the springs.

However, it is also possible for the springs to be arranged between the locking device and the bearing blocks of the closest lubricating roller. In this case, the springs permanently press the greasing rollers onto one another, so that they are moved towards one another under the action of the springs when they come into contact with the workpiece. In this embodiment, no additional feed device for the greasing rollers in the direction of the workpiece is required. When a workpiece in the form of a strip or blank is moved into the passage gap, the greasing rollers are pressed apart against the force of the springs.

According to an advantageous development of the invention, the columnar shafts are arranged vertically either on a base plate or on a rectangular collecting container. In the latter case, excess greasing substances can be taken directly from the collecting container can be collected without the need for additional facilities.

Several embodiments are also possible in the formation of the columnar shafts. According to a first embodiment variant, only one column-like shaft is provided at each end of the greasing rollers to line up the bearing blocks. With this training e.g. only one bearing block of the floating greasing roller should be provided with two firmly attached, outwardly projecting sliding eyes for the shaft arranged on one side.

According to a further, particularly advantageous embodiment, two column-like shafts are arranged at each end of the greasing rollers to line up the bearing blocks. This design allows a stable, tilt-free alignment of the pedestals and thus the greasing rollers.

Different embodiments are also possible with regard to the spring arrangement. Thus, on the one hand, the springs can be provided on at least two shafts either on a longitudinal side of the greasing rollers or on two diagonally opposite shafts or basically on each shaft.

According to an advantageous development of the invention, the locking device consists of a locking plate with keyhole-like recesses arranged therein according to the position and number of the column-like shafts, with which they can be accessed via the free The end of the columnar shafts can be pushed and then perpendicular to the longitudinal axis with the narrowing, hole-like opening area can be pushed into a recess at the end of the columnar shafts and can be held in this position by means of a locking device. The locking device can consist of a sash in the form of a lever that can be pivoted by hand, so that the locking device can be replaced without tools and thus the greasing rollers with their bearing blocks and springs can be replaced with new ones without tools.

However, it is also possible to form the locking device from cap nuts with spring washers which can be screwed onto a thread located at the free ends of the columnar shafts. Instead of these cap nuts, it is also possible to push split pins through diametrical through openings at the end of the columnar shafts.

In the case of devices for the controllable greasing of workpieces in the form of strips or blanks, it may be necessary to be able to attach the greasing rollers to the workpiece surface both in terms of time and location. For this, both in the subject of DE-GM 93 04 899 and in the device according to DE 41 05 364 C1, a pressure medium cylinder arrangement is used in connection with a guide rod or a ball guide.

According to the invention, this control is considerably simplified in that on the locking plate and / or a fluid-operated piston-cylinder arrangement is arranged below the bearing blocks of the greasing roller located below, via the extendable piston rods of which the bearing blocks can be moved on the shafts. If, according to the first embodiment variant, two piston-cylinder arrangements acted upon by a common fluid line are arranged on the locking plate for the movement of the two bearing blocks of the closest greasing roller, only this greasing roller can be moved in the direction of the workpiece.

In the second embodiment variant, with the piston-cylinder arrangements arranged below the bearing blocks of the greasing roller below, these can also be placed in a controllable manner on the underside of the workpiece. According to a third embodiment, the bearing blocks of both the upper and the lower greasing roller can be acted upon by the piston-cylinder arrangements. Both greasing rollers can be acted upon either simultaneously via a common fluid line or via separate fluid lines at different times and can therefore be applied to different locations of the workpieces without the rapid interchangeability of the greasing rollers being impaired thereby.

The control of the bearing blocks is advantageously carried out in such a way that, on their sides facing the piston rods, they are each provided with a blind hole in which the free end of the associated piston rod engages in a centering manner.

• Fig. 1 die Ansicht in Durchlaufrichtung des Werkstückes auf eine erste Ausführungsform mit zwischen den Lagerböcken auf je zwei säulenartigen Schäften angeordneten Befettungswalzen, von denen die Lagerböcke der oberen Befettungswalze mittels zweier fluidbetriebener Kolben-Zylinder-Anordnungen in Richtung auf die unten gelegene Befettungswalze zustellbar ist,.
• Fig. 2 die Draufsicht von Fig. 1,
• Fig. 3 die Seitenansicht in Richtung des Pfeiles III von Fig. 1,
• Fig. 4 eine der Fig. 1 entsprechende Ansicht, jedoch mit kürzeren Befettungswalzen,
• Fig. 5 die Draufsicht von Fig. 4,
• Fig. 6 die Ansicht in Richtung des Pfeiles VI von Fig. 4,
• Fig. 7 die perspektivische Draufsicht der Vorrichtung von Fig. 4,
• Fig. 8 eine Ansicht in Durchlaufrichtung des Werkstückes auf eine weitere Ausführungsform einer Vorrichtung, bei welcher sämtliche Lagerböcke fluidgesteuert sind und der untere Teil der Vorrichtung als Auffangbehälter ausgebildet ist,
• Fig. 9 die Seitenansicht in Richtung des Pfeiles IX von Fig. 8,
• Fig. 10 die Ansicht in Durchlaufrichtung des Werkstückes auf eine weitere Ausführungsform einer Vorrichtung ohne Fluidsteuerung, bei welcher die obere Befettungswalze beim Durchlauf eines Werkstückes unter Wirkung der Federn automatisch gegen die untere Befettungswalze gedrückt wird,
• Fig. 11 die Draufsicht von Fig. 10 und
• Fig. 12 die Seitenansicht in Richtung des Pfeiles XII von Fig. 10.

Several embodiments of the invention are shown in the drawing. Show:

• 1 is a view in the direction of passage of the workpiece on a first embodiment with greasing rollers arranged between the bearing blocks on two column-like shafts, of which the bearing blocks of the upper greasing roller can be advanced in the direction of the greasing roller located below by means of two fluid-operated piston-cylinder arrangements, .
• 2 shows the top view of FIG. 1,
• 3 is a side view in the direction of arrow III of FIG. 1,
• 4 is a view corresponding to FIG. 1, but with shorter greasing rollers,
• 5 shows the top view of FIG. 4,
• 6 is the view in the direction of arrow VI of FIG. 4,
• 7 is a top perspective view of the device of FIG. 4;
• 8 is a view in the direction of passage of the workpiece on a further embodiment of a device in which all bearing blocks are fluid-controlled and the lower part of the device is designed as a collecting container,
• 9 is a side view in the direction of arrow IX of FIG. 8,
• 10 shows the view in the direction of passage of the workpiece on a further embodiment of a device without fluid control, in which the upper greasing roller is automatically pressed against the lower greasing roller during the passage of a workpiece under the action of the springs,
• Fig. 11 is the top view of Fig. 10 and
• 12 shows the side view in the direction of arrow XII of FIG. 10.

A first embodiment of the device 10 according to the invention for greasing workpieces in the form of strips or plates is shown in FIGS. 1 to 3. This device 10 has two greasing rollers 11, 12, which are provided with fat-permeable material and are aligned coaxially to one another, each of which is rotatably mounted on both ends of a hollow shaft 13, 13a in a bearing block 14, 15 and 16, 17, respectively. Of these bearing blocks, the bearing blocks 14 and 15 can be moved on two column-like shafts 18, 19 against the action of a helical spring 20, 21 which concentrically encompasses these shafts 18, 19 in the direction of the fixed bearing blocks 16 and 17.

In the present case, the cylindrical coil springs 20, 21 try the bearing blocks 14, 16 and 15, 17 apart, so that the greasing rollers 11, 12 do not contact each other due to the resulting gap 22. The columnar shafts 18, 19 are arranged vertically on a base plate 23, be it detachable by means of screws (not shown), welded on or by some other type of fastening. In this way, first the bearing blocks 16, 17 with the lower greasing roller 12, then the springs 20, 21 and then the bearing blocks 14, 15 with the upper greasing roller 11 are lined up on the shafts 18, 19. At their free ends, the columnar shafts 18, 19 are each provided with a recess 24. In order to keep the greasing rollers 11, 12 with their bearing blocks 14-17 and the springs 20, 21 in the lined up position, a locking device 25 is required.

This locking device 25 consists of a locking plate 26 with a total of four keyhole-like recesses 27 (see FIG. 2), with which they can be pushed over the free end of the columnar shafts 18, 19 and then perpendicular to their longitudinal axis in the direction of arrow 28 with the narrowing, hole-like opening region 27a can be pushed into the recess 24 at the end of the columnar shafts 18, 19 and can be held in this position by means of a locking device 29. In the present case, this locking device 29 consists of a sash 30 which can be pivoted about a pivot axis 31 in the direction of the double arrow 32. In the in 2 position, the sash 30 holds the locking plate 26 in its locking position.

However, it is also possible to form the locking device from cap nuts (not shown) with underlying spring washers which can be screwed onto threads (not shown) located on the free ends of the columnar shafts 18, 19.

In the exemplary embodiment of FIGS. 1 to 3, the springs 20, 21 are supported with their one end 20a or 21a on the underside 33 of the bearing blocks 14, 15 and with their other end 20b, 21b on the upper side 34 of the bearing blocks 16, 17 . As a result, the greasing rollers 11, 12 are kept apart under the action of the force of the springs 20, 21, as a result of which the passage gap 22 is formed between their contact surfaces.

In order that the upper greasing roller 11 can now be applied to the top of the workpiece when a workpiece passes through the passage gap 22, a fluid-operated piston-cylinder arrangement 35, 36 is arranged on the locking plate 26 at both ends of the greasing roller 11. The bearing blocks 14, 15 are provided on their upper sides 38 facing the piston rods 37, each with a blind hole 39 into which the free end of the associated piston rod 37 engages in a centering manner.

The embodiment of FIGS. 4 to 6 differs from the embodiment of FIGS. 1 to 3 only by a shorter design of the greasing rollers 11a, 12a. Otherwise, the parts match and are therefore also designated by the same reference numerals according to FIGS. 1 to 3. The hollow axis 40 of the upper lubrication roller 11a and the hollow axis 41 of the lower lubrication roller 12a are clearly visible.

FIG. 7 shows the top perspective view of FIG. 4.

8 and 9, the columnar shafts 18, 19 are arranged vertically on a cuboid collecting container 42. Two further fluid-operated piston-cylinder arrangements 43, 44 are arranged below the bearing blocks 16, 17 below, and the bearing blocks 16, 17 can be moved via the extendable piston rods 45. Otherwise, the other parts correspond to those of FIGS. 1 to 3 and are therefore identified by the same reference numerals. Here, too, the piston rods 45 of the piston-cylinder arrangements 43, 44 engage in blind holes 46 of the lower bearing blocks 16, 17. By means of the piston-cylinder arrangements 35, 36 on the one hand and 43, 44 on the other hand, the greasing rollers 11, 12 can be attached to the top and to the bottom of the workpiece, depending on or independently, possibly also at different times, depending on the desired greasing Pass plane 47 passes through the passage gap 22.

For certain applications in which the workpieces in the form of strips or blanks are always greased evenly on the top and bottom an embodiment according to FIGS. 10 to 12 is sufficient without the fluid-driven piston-cylinder arrangements 35, 36; 43, 44 of the embodiment of FIGS. 8 and 9. In this case, the springs 20, 21 are arranged between the locking plate 26 and the bearing blocks 14, 15 of the nearest lubricating roller 11 on the columnar shafts 18, 19. With this arrangement, the greasing roller 11 is pushed upwards in the direction of arrow 48 against the force of the springs 20, 21 when a workpiece enters the passage gap 22, whereby both sides of the workpiece can be greased evenly without the need for a fluid-operated piston cylinder - arrangement 35, 36; 43, 44 is required. Otherwise, parts corresponding to FIGS. 1 and 3 are designated by the same reference numerals.

In the context of the invention it is also possible that instead of the two columnar shafts 18, 19 only one columnar shaft 18 or 19 is provided at both ends of the greasing rollers 11, 12 or 11a, 12a for the alignment of the bearing blocks 14-17. This could be done, for example, with a central arrangement at the level of the axis of symmetry 49 of FIG. 3, in that, according to FIG. 1, the sliding eyelets 50 indicated in the bearing block 15 in FIG . In this case, however, the locking screws 52 of the hollow axles 13, 13a could be arranged retractably in the bearing blocks 14-17, whereas the sliding eyes 50 on the bearing blocks 15, 17 with the connections 51 for introducing the lubricating agent eccentrically from the Axis of symmetry 49 would be provided on the bearing blocks 15, 17.

Claims (12)

1. Device (10) for lubricating strip- or flat bar-shaped workpieces, having a plurality of hollow lubricating rollers (11, 12; 11a, 12a), which are provided with grease-permeable material and are each rotatably supported on a hollow axle (13, 13a) at both ends in a bearing block (14 - 17), which is movable along at least one column-like shaft (18, 19) under the action of a helical spring (20, 21) which concentrically encompasses said shaft, characterized in that the bearing blocks (14 - 17) with the springs (20, 21) are threaded at both ends of the lubricating rollers (11, 12; 11a, 12a) on common, column-like shafts (18, 19), are held in said threaded arrangement by a locking device (25) and are movable towards one another either counter to the action of the springs (20, 21) or with the aid of the springs (20, 21).
2. Device according to claim 1, characterized in that the column-like shafts (18, 19) are disposed vertically either on a base plate (23) or on a cuboidal collecting container (42).
3. Device according to claim 1 or 2, characterized in that only one column-like shaft (18, 19) for threading of the bearing blocks (14 - 17) is provided at each end of the lubricating rollers (11, 12).
4. Device according to claim 1 or 2, characterized in that two column-like shafts (18, 19) for threading of the bearing blocks (14 - 17) are disposed at each end of the lubricating rollers (11, 12).
5. Device according to one of claims 1 to 4, characterized in that the springs (20, 21) are disposed on at least two shafts (18, 19) which are either situated at one longitudinal side of the lubricating rollers (11, 12) or lie diagonally opposite one another.
6. Device according to one of claims 1 to 5, characterized in that the locking device (25) comprises a locking plate (26) having keyhole-like recesses (27), which are disposed therein according to the position and number of the column-like shafts (18, 19) and by means of which the locking plate (26) may be slid over the free end of the column-like shafts (18, 19) and then pushed at right angles (arrow 28) to their longitudinal axis (18a, 19a) with the narrowing, hole-like opening region (27a) into an offset (24) at the end of the column-like shafts (18, 19) and fixed in said position by means of an arresting device (29).
7. Device according to claim 6, characterized in that the arresting device (29) comprises a turnbuckle (30).
8. Device according to claim 7, characterized in that the arresting device (29) is formed by cap nuts with spring washers, which may be screwed onto a thread situated on the free ends of the column-like shafts (18, 19).
9. Device according to one of claims 1 to 8, characterized in that the springs (20, 21) are disposed between the bearing blocks (14, 15; 16, 17) on the column-like shafts (18, 19).
10. Device according to one of claims 1 to 8, characterized in that the springs (20, 21) are disposed between the locking plate (26) and the bearing blocks (14, 15) of the immediately adjacent lubricating roller (11).
11. Device according to one of claims 1 to 10, characterized in that disposed on the locking plate (26) and/or below the bottom bearing blocks (16, 17) is a pneumatic piston/cylinder arrangement (35, 36; 43, 44), by means of the extendable piston rods (37) of which the bearing blocks (14, 15; 16, 17) are movable.
12. Device according to claim 11, characterized in that the bearing blocks (14, 15) at their sides (38) facing the piston rods (37) are each provided with a blind hole (39), into which the free end of the associated piston rod (37) engages in a centring manner.

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