EP0168628A2 - Tiltable load suspension device for the handling of heavy coils - Google Patents

Abstract

Tilting gear for receiving and handling heavy spools or reels with a roller bracket guided in a trolley and a mandrel arranged thereon, which serves to engage in the core bore of the roller with a radially extendable clamping jaw, the drive for the jaw actuation comprising a spring-loaded pivot lever which is pivotable by eccentric against the spring force in the retracted position of the jaw.

Description

The invention relates to a tilting tableware for receiving and handling heavy spools or reels with a roller bracket guided in a trolley and arranged on this, serving to engage in the core bore of the roller mandrel with a radially extendable clamping jaw.

Such tipping harnesses are usually suspended from the trolley and are used to transfer goods wound on rolls, such as wires, cables, sheet metal coils, paper webs or the like, from one particular position to another. The necessities for this arise in the course of processing such materials in a variety of ways. For this purpose, the mandrel of the tilting gear is inserted into the core bore of the reel or spool and spread there. The load is then raised by lifting the trolley and it can be pivoted into a different position, generally by 90 °, by pivoting the roller bracket in the trolley. By choosing the center of gravity of the load with the roll bar, the tilting tableware is comparatively easy to handle.

The devices for tensioning the mandrel in relation to the core bore of the reel or spool are in many cases quite complicated and expensive. In addition, their space requirements are sometimes considerable. In general, these mandrels work purely mechanically, and they primarily attack the outer collar of the coil. However, such rolls are increasingly being produced only with cylinder bores without an outer collar, which makes it more difficult to use the harnesses designed in this way.

Although already hydraulically operated devices, together with a package of prestressed Phone for engaging in the cylinder bore verspreizbare jaws of the spine _- have been proposed lerfedern. In spite of its excellent technical performance properties, however, this device is too complicated and too complex for practical use in most cases.

The invention is therefore based on the object of designing a tilting tableware of the type mentioned at the outset in such a way that it ensures safe handling of the coils both in terms of construction and in terms of handling which is very simple.

To solve this problem, the invention provides that the drive for the jaw actuation comprises a spring-loaded pivot lever which can be pivoted by an eccentric against the spring force into the retracted position of the jaw.

The inventive construction, in which preference is also only one jaw is used instead of the previously üblichen.meist by 120 ⁰ offset jaws, can be seen on the in the previously proposed devices already completely dispense with the necessary hydraulic pistons and their control systems. Because of the use according to the invention of a mechanical clamping jaw drive, extremely high and always constant clamping forces can be achieved through the selection of corresponding lever arms and thus force ratios. This means that heavy spools and reels are reliably held on the mandrel, even if the mandrel points vertically downwards. The high clamping forces, on the other hand, are only relatively small forces required for adjusting the eccentric in the configuration according to the invention, since the eccentric alone has to overcome the spring force opposing it. This can also be reduced again if necessary by lever transmission.

It is within the scope of the invention that the pivot lever has a short lever arm for engaging the clamping jaw and a long lever arm for engaging the spring force and the eccentric. The mandrel engaging in the core bore of the spool or reel offers sufficient space in its interior for such a double lever with a short load arm and a long power arm, so that the power transmission can be adapted to the corresponding requirements within comparatively wide limits.

The short lever arm of the swivel lever engages with particular advantage directly in a window-like opening in the foot part of the clamping jaw, so that there is a positive guidance between the swiveling lever and clamping jaws in such a way that the clamping jaw follows every movement of the swiveling lever, namely when the clamping jaw is extended into the clamping position, as when retracting the jaw into the disengaged position.

In a particularly simple embodiment, according to another feature of the invention, the spring consists of a screw pressure arranged in a longitudinally adjustable sleeve feather. Due to the longitudinal adjustability of the sleeve in its mounting on the roller bracket or the like, the pretensioning of the spring arranged in the sleeve and thus the force for tightening the clamping jaw relative to the roll or spool to be accommodated by the mandrel can be varied within relatively wide limits.

Another alternative provides the invention in such a way that between the eccentric and the lever arm a spring arrangement is provided which is prestressed in a pressure housing and the pressure housing engages on the lever arm and is guided so that it can be displaced without pressure across the lever arm. The spring arrangement can consist of one or more helical springs, possibly also disc springs or the like. These springs are stored under preload in the pressure housing. In this case too, a device for changing the pretensioning of the springs can be provided, if necessary. The displaceable mounting of the pressure housing on the roller bracket causes the pressure housing with the spring arrangement biased therein to follow the movement of the long lever arm caused by the eccentric. This movement of the power arm ends with the non-positive contact of the clamping jaw actuated by the short lever arm on the inside of the spool or roller. By the spring arrangement interposed between the eccentrics and the lever arm, the further movement of the. Eccentrically picked up by the compression springs while the swivel lever no longer moves. The advantage of this arrangement is that a large part of the entire tensioning movement caused by the eccentric actuation takes place without pressure and only the last part of this movement takes place against the force of the compression springs of the spring arrangement. This greatly facilitates the operation of the device, while on the other hand the available clamping forces are still available. In its further embodiment, the invention provides for the mechanical connection between the eccentric and the spring arrangement, that between the eccentric and the spring arrangement is arranged a displaceable yoke relative to the pressure housing, one pressure piece on the eccentric and the other pressure piece within the pressure housing as an abutment for the compression spring, the pressure housing forming the other abutment for the compression spring arrangement. Due to the force of the compression spring arrangement, the one pressure piece of this yoke is generally held in firm contact with the pressure housing. The pressure housing and the displaceable yoke form a fixed unit, as long as the long lever arm of the swivel lever follows the eccentric movement. Only when the clamping jaw has come into firm contact with the load to be picked up by the mandrel is this unit of yoke and pressure housing lifted, and there is a relative movement of the yoke with respect to the pressure housing, and this relative movement acts on the one or more compression springs Compression spring arrangement within the pressure housing.

It is within the scope of the invention to arrange a roller guide for the pressure housing on the roller bracket. On the other hand, a further feature of the invention provides that the pressure housing has a positive guide for the lever arm. For example, the pressure housing on a frame part can have a window into which the end of the pivot lever engages. Possibly. the pivot lever can also engage between two journals mounted on the pressure housing at a distance. In this way, there is a positive guidance between the pressure housing and the lever arm, as a result of which the pressure housing follows all the movements of the long lever arm of the swivel lever caused by the eccentric.

In order to prevent the risk of the roll or spool picked up by the mandrel from falling due to incorrect handling with insufficiently or insufficiently spread clamping / baking under all circumstances and thus reliably avoiding To exclude the risk of an accident, the invention provides in its further embodiment a locking device for the swivel lever that automatically engages in the extended position of the clamping jaw. This lock does not necessarily have to act directly on the swivel lever, it can act in the same way on the eccentric or on a part firmly connected to it. This locking device can be designed with particular advantage in such a way that a locking pin, which is under the action of a tension spring and can be moved transversely to the pivoting lever or to the eccentric or a component connected to it, is provided, which in the one end position of the eccentric, that of the extended position corresponds to the clamping jaw, engages in a corresponding recess on the eccentric or on the swivel lever or the like. By such a locking device. ensures that the swivel lever can only be actuated with swiveled clamping jaws to swivel the roll bar.

Another alternative is provided by the invention in that the eccentric can be connected to a locking plate which has a catch and is arranged in the movement path of a bolt which is under spring tension in the direction of engagement with respect to the catch. If the eccentric has reached its end position when the clamping jaw is actuated, the bolt falls into the catch under the force of the spring acting on it and leads to a reliable locking of the device.

Finally, it is within the scope of the invention to arrange further friction linings which are offset circumferentially relative to the clamping jaw, in order to ensure that the mandrel is securely jammed in the cylinder bore of the reel or spool to be held in, and that the spool does not fall, regardless of the use of only one extendable and retractable clamping jaw To prevent load in any case.

• Fig. 1 einen axialen Längsschnitt durch den Dorn eines erfindungsgemäßen Kippgeschirrs, dessen Rollbügel zur abgebrochen, ohne die in üblicher Weise ausgebildete Laufkatze angedeutet ist, in der ausgefahrenen Stellung des Spannbackens;
• Fig. 2 einen der Fig. 1 entsprechenden Schnitt bei zurückgezogenem Spannbacken;
• Fig. 3 einen Längsschnitt längs der gewinkelten Linie III - III im Bereich des Betätigungsexzenters;
• Fig. 4 einen vergrößerten Schnitt durch die Spitze des Dornslängs der Linie IV - IV in Fig. 2;
• Fig. 5 eine der Fig. 1 entsprechende abgebrochene Darstellung einer weiteren Ausführungsform der Erfindung bei zurückgezogenem Spannbacken;
• Fig. 6 die Vorrichtung nach Fig. 5 bei ausgefahrenem Spannbacken;
• Fig. 7 einen Schnitt etwa nach Linie VII - VII in Fig. 6;
• Fig. 8 eine Aufsicht in Pfeilrichtung VIII in Fig. 6;
• Fig. 9 einen-Teilschnitt durch Fig. 6 in Pfeilrichtung IX und
• Fig.10 eine Ansicht der Fig. 9 in Pfeilrichtung X ohne Abdeckblech und Handrad.

Further advantages, features and details of the invention result from the following description of some exemplary embodiments of the invention and from the drawing. Here show:

• Figure 1 shows an axial longitudinal section through the mandrel of a tilting table according to the invention, the roll bracket of which is broken off, without the trolley being indicated in the usual manner, in the extended position of the clamping jaw;
• FIG. 2 shows a section corresponding to FIG. 1 with the clamping jaw retracted;
• 3 shows a longitudinal section along the angled line III-III in the region of the actuating eccentric;
• 4 shows an enlarged section through the tip of the length of the mandrel along the line IV-IV in FIG. 2;
• FIG. 5 shows a broken-off representation corresponding to FIG. 1 of a further embodiment of the invention with the clamping jaw withdrawn;
• 6 shows the device according to FIG. 5 with the clamping jaws extended;
• 7 shows a section approximately along line VII-VII in FIG. 6;
• Fig. 8 is a plan view in the direction of arrow VIII in Fig. 6;
• Fig. 9 is a partial section through Fig. 6 in the direction of arrow IX and
• 10 is a view of FIG. 9 in the direction of arrow X without cover plate and handwheel.

In the figures, one can only see a detail of the roll bar 1, the flange 2 of which is guided in the rollers of the trolley L indicated by dash-dotted lines, while the web 3 runs on the rollers R. At one end of the roll bar 1, a mandrel 4 is fastened, which has a radially displaceable clamping jaw 6 near its end face 5. The clamping jaw 6 is shown in FIG. 1 in its extended position and in FIG. 2 in its retracted position. Staggered by 120 ° relative to the clamping jaw 6 in the area of the free end of the mandrel 4 are friction Pads 7 applied in order to achieve a secure non-slip spreading in the roller 9 indicated by dash-dotted lines in FIG. 2 in connection with the extendable clamping jaws 6, which is also provided with a friction lining pad 8.

The foot section 10 of the clamping jaw 6 is provided with an opening 11 in which the short lever arm 12 of a pivot lever 14, which is mounted in the immediate vicinity of the clamping jaw 6 on an axis 1'3, engages, the longer lever arm 15 of which is under the action of a helical compression spring 16. The helical compression spring 16 is arranged in a sleeve 17, which is provided with an external thread 18 and can be screwed or unscrewed into the bearing block 19 in order to be able to adjust the prestressing and thus the spring force with a corresponding shortening of the helical compression spring 16, with which - by the lever ratio of Swivel lever 14 translated - the clamping jaw 6 is pressed radially outward into its clamping position.

In the area of the free end of the lever arm 15 of the pivot lever 14, an eccentric cam 20 is fastened on a shaft 21, which is provided with a hand lever 22, which pivots the eccentric 20 between the position shown in FIG. 1, in which the pivot lever 14 below the effect of the helical compression spring 16 is shifted outwards into the clamping position and the position according to FIG. 2 is adjustable, in which the pivot lever 20 has been pivoted by the eccentric against the force of the helical compression spring 16, so that it moves the clamping jaws 6 into the The mandrel 4 has retracted the retracted position. The eccentric 20 is fixedly connected to a locking plate 23 which has a locking recess 24 which is in the pivoted position according to FIG. 1, ie in the extended clamp position of the jaw 6, aligned with a spring-loaded locking bolt 25 (Fig. 3), so that this locking bolt automatically engages in the opening 24 and thus prevents the eccentric 20 from turning back. So that the jaws 6 can not be moved back into the retracted position, so that the jamming of the mandrel 4 in the coil 9 can not be released in this locking position of the eccentric 20. This locking also has the task that due to the resulting fixation of the hand lever 22 this can only be used when the jaws are spread to pivot the roller bracket in the rollers R of the trolley L.

A further embodiment is shown in FIGS. 5 to 10. The trolley L is suspended with its hook 30 on a lifting device (not shown), a crane hook or the like. On its rollers R, it guides the web 3 of the roll bar ¹ on both sides of the roll bar flanges 2. On the inside 31 of the roll bar 1, the mandrel 4 is fastened, in which the pivot lever 14 designed as a double lever is pivotably mounted about the axis 13. The short lever arm 12 engages in a window-like recess 11 of the foot 10 of the clamping jaw 6, the friction lining of which is designated 8. The end 32 of the long lever arm 15 of the pivot lever 14 engages in the space between the two pins 33, which are arranged on a housing extension 34 of a pressure housing 35. This is arranged between the two flanges 2 of the roll bar 1 shown in FIG. 9. It is slidably guided in its longitudinal direction between the rollers 36 mounted on the flanges 2. In the embodiment shown, 6 spring bolts 38 are arranged inside the pressure housing 35, which is closed by a cover 37, on each of which a compression spring 39 is mounted under prestress. The compression springs 39 are supported on the one hand on the cover 37 of the housing 35 and on the other hand via a collar 40 on the Pressure piece 41 from a yoke 42, the other pressure piece 43 abuts the eccentric 20. The bolts 38 carrying the compression springs 39 are mounted in the pressure piece 41. 5 shows the starting position. There, the pressure piece 41 of the yoke 42 bears against the inside of the end wall 44 of the pressure housing 35. The role 45 between the two stops 46 u. 47 movable eccentric 20 abuts the pressure piece 43. The eccentric 20 is fastened on the shaft 21 by means of a bolt 48.

At the end of the shaft 21, a locking plate 23 is fastened by means of the bolt 50. This has a catch 51 and it is arranged in the range of motion of a bolt 52 which is fastened to a shaft 54 mounted in the housing 53. The shaft 54 carries a handwheel 55 at its end. A tension spring 57 engages on the holder 56 of the bolt 52, the other end of which is attached to the housing 53 at 58. By means of this tension spring 57, the latch 52 is held in the opposite direction of the arrow 59 in engagement with the catch 51 of the latch plate 23. The position of the locking device shown in FIG. 10 corresponds to the extended position of the clamping jaw 6 according to FIGS. 6 and 7. It shows that the hand lever 22 is locked in this position. With its help, the entire roll bar 1 can be moved in the trolley L. The arranged between the lever arm 15 and the eccentric 20 further tension spring 60 strives to keep the eccentric 20 in the position shown in FIG. 6. The tension spring 60 engages on a bracket 61 on the eccentric 20 and a further bracket 62 on the pivot lever 14.

If the locking of the locking plate 23 is released by actuating the handwheel 55, the locking bar 52 is lifted out of the catch 51 of the locking plate 23, the eccentric 20 can be pivoted back into the position according to FIG. 5. Here, the compression springs 39 relax until the pressure plate 41 of the yoke comes into contact with the inside of the Housing wall 44. At the same time, the long lever arm 15 of the swivel lever 14 is returned to the starting position according to FIG. 5 by the positive guidance between the two bolts 33 of the pressure housing 35, in which the clamping jaw 6, as can be seen, is retracted.

The entire path of the eccentric 20 from the position according to FIG. 5 into the position according to FIG. 6 is designated by 63 in FIG. 6. Only a small part of this, which is denoted by 64 in FIG. 6, is covered against the force exerted by the compression springs 39.

Claims (13)

1. Tilting gear for receiving and handling heavy spools or reels with a roller bracket guided in a trolley and a mandrel arranged thereon and used to engage in the core bore of the reel with a radially extendable clamping jaw, characterized in that the drive for the Clamping jaw actuation comprises a spring-loaded pivot lever (14) which can be pivoted into the retracted position of the clamping jaw (6) by an eccentric (20) against the spring force. 2. Tilting gear according to claim 1, characterized in that the pivot lever (14) has a short lever arm (12) for attacking the jaws (6) and a long lever arm (15) for attacking the spring force and the eccentric (20). 3. tilting table according to claim and 2, characterized in that - based on the position of the points of attack of the eccentric (20) and the spring (16) - the pivot axis (13) of the pivot lever (14) in the vicinity of the clamping jaw (6 ) lies. 4. tilting table according to claim 1 to 3, characterized in that the short lever arm (12) of the pivot lever (14) engages in an opening (1, 1) of the jaw base (10). 5. Tilting gear according to one of claims 1 to 4, characterized in that the spring is a helical compression spring (16) arranged in a longitudinally adjustable sleeve (17). 6. Tilting gear according to one of claims 1 to 4, characterized in that between the eccentric (20) and the lever arm (15) a in a pressure housing (35) biased spring assembly (39) is provided and the pressure housing (35) on the lever arm (15) attacks and is guided transversely to the lever arm (15) without pressure. 7. Tilting gear according to claim 6, characterized in that between the eccentric (20) and the spring arrangement (39) a relative to the pressure housing (35) displaceable yoke (42) is arranged, one of the pressure piece (43) on the eccentric (20) and whose other pressure piece (41) is arranged inside the pressure housing (35) as an abutment for the compression spring arrangement (39), the pressure housing (35) forming the other abutment. 8. Tilting gear according to claim 6 or 7, characterized in that a roller guide (36) for the pressure housing (35) is arranged on the roller bracket (1). 9. Tilting gear according to claim 6 to 8, characterized in that the pressure housing (35) has a positive guide for the lever arm (15). 10. Tilting gear according to one of claims 1 to 9, marked. is characterized by a locking device (25, 26) for the swivel lever (14) that engages automatically in the extended position of the clamping jaw (6). 11. Tilting gear according to claim 10, characterized in that in a recess (24) on the pivot lever (14) or on the eccentric (20) engaging, under the action of a tension spring (26) standing locking bolt (25). 12. Tilting gear according to claim 10, characterized in that the eccentric (20) is connected to a locking plate (23) which has a catch (51) and is arranged in the movement path of a bolt (52) which is in the direction of engagement with respect to the catch (51) is under spring tension. 13. Tilting gear according to one of claims 1-12, characterized in that circumferentially offset brake pads (7) are arranged on the mandrel (4) above the clamping jaws (6).

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