EP1528031A1 - Releasable fastening of a cable at a drum - Google Patents

Abstract

The releasable fastening of especially a wire cable (2) to a cable drum (1), has a connecting piece through which the cable is fastened by a thickened section to the drum in the region of a through-hole in the drum. The connecting piece (4) is detachably fastened in the through-hole (1a), and the connecting piece is locked in the through-hole through the thickened section (2a) which is fastened to the connecting piece. The connecting piece is pushed into the through-hole from the outside and retained therein with positive locking, and the thickened section is fastened with positive locking on a part of the connecting piece protruding from the through-hole.

Description

The invention relates to a releasable attachment of a cable to a cable drum, in particular a wire rope, with a passage opening arranged in the cable drum, with a cable end thickening on the rope and a connecting piece, about the rope with its Seilendverdickung detachable with the rope drum in the area the passage opening is attached.

Cable attachments on winding drums or rope drums of a hoist are for safety reasons machine elements with very high quality requirements; Their design is prescribed in DIN 15020 and in EN 14492-2. At the deepest Position of a suspension must still have at least 2 cable coils on the Winding drum lie, the Seilendbefestigung on the winding drum so must be carried out that, taking into account the friction on the Winding drum remaining turns 2.5 times the cable pull, at a Friction coefficient between wire rope and pad of μ = 0.1 can be recorded can. Guidelines and dimensioning of the attachment are, for example, in the steel-iron worksheet (SEB) 666211. Here are the rope ends mostly annealed or wrapped in wire.

It is known, the rope end with a pressed-thickening, mostly cylindrical End sleeves made of different materials, to provide, at the same time the easy insertion through a substantially transverse through the drum wall extending passage opening into the interior of the winding drum, where the Rope end with its thickening in one, made of a cast material Cable drum, cast-in recess added and detachable if necessary is held. Such a solution is for example in the German Patent DE 101 07 390 C1 described.

The pressed-on thickenings of the rope ends, also referred to as compression sleeves, With the same space requirement, larger cable pulling forces can be applied to the drum transferred, as the most commonly used cable clamps with screw fastening according to SEB 666211. Because fewer fixing coils are needed than with Screw terminals allow the used press sleeves with the same usable Rope length overall shorter drum lengths, which besides a cost advantage too makes a cheaper space utilization possible. It can also be added Use of compression sleeves of assembly work when attaching the rope end on the cable drum compared to the solution with screw considerably to reduce. Another advantage of the compression sleeve is the fact that you have the correct, positive fitting of widths can recognize and the danger of not properly dressed and not for example by settling down permanently secured screws is excluded.

The known from German Patent DE 101 07 390 C1 Seilendbefestigung provides, in the circumference of the drum tube specially shaped pockets pour on, which absorb the compression sleeves. However, this assumes that The drum tube is produced as a casting, which is not always the case today. It Very often, not least for cost reasons, rope drums made seamless rolled tubes or from round rolled longitudinally welded plates manufactured. At such a cable drums, the attachment of the press sleeves in the not described above.

This applies equally to a solution as described in US Pat. No. 2,329,943 describes, and in which also a cast cable drum is used. at the Seilendbefestigung described there is applied to the end of the rope Press sleeve after passing through the passage opening of a Attached in a molded recess of the cable drum in the Area of the intended passage opening for the rope end is screwed. The connector closes the passage opening so far that the Thickening of the rope end inside the winding drum blocked and held becomes. Connector and winding drum are complicated and manufactured adapted to each other moldings, with which a release of the Seilendbefestigung of Although the drum is possible, but their preparation and use consuming and expensive.

DE 625 612 discloses a device for attaching a cable end to a Cable drum, in which an approximately C-shaped cable hook in a keyhole-shaped Slit hung in the cable drum and by turning 180 ° in the slot is determined. In the rope hook, the rope is attached by means of a rope thimble.

DE 687 945 discloses the attachment of a rope in one of the cable drum screwed bracket by means of a Seilendverdickung.

Starting from a detachable Seilendbefestigung the above Art is the object of the invention is one with little effort and fast to create detachable rope end fastening. Preferably, this Seilendbefestigung also on non-cast winding drums made of seamless or off be used longitudinally welded pipes, without the advantages of the known Attachments of the rope ends to cast winding drums do without have to. The attachment of the rope ends should also in non-cast winding drum tubes then be possible if the drums on their faces closed or otherwise inaccessible inside.

To solve this problem is at a releasable attachment of a rope a cable drum, in particular a wire rope, with one in the cable drum arranged passage opening, with a Seilendverdickung on the rope and a connecting piece, over which the rope with its Seilendverdickung solvable with the cable drum is fixed in the area of the passage opening, it is proposed that the connection piece is releasably secured in the passage opening and the Rope end thickening is releasably attached to the connector. This will achieved that only with a component in the form of the connection piece a safe Rope end attachment is achieved.

Unlike the prior art, in which the rope end in the through hole the drum must be inserted, protrudes the fitting of the invention out of the passage opening out so far out there that thickened End of the wire rope can be recorded and held. The connection piece is preferably designed so that, when the end faces of the Cable drum tube through other components, e.g. closed by the frame are as an item from the outside into the through hole in the drum-shaped Winding drum can be used.

A particularly simple construction and safe operation of the rope end connection is achieved in that the connector in the through hole through the attached to the connector attached Seilendverdickung is locked.

For attachment of the rope end is according to a further feature of the invention Connecting piece in its outwardly projecting area with an approximately tangential is provided to the winding drum extending bore through which the rope is hindurchführbar and where the Seilendverdickung of the rope in the rope longitudinal direction can be fixed in a form-fitting manner.

According to a favorable feature of the invention it is provided that the bore is stepped and has an annular bearing surface on which a End face of the rope end thickening rests positively.

It is particularly favorable when, according to another feature of the invention Bore in its longitudinal extent to the outside in a rope diameter corresponding width is slotted and the rope from the outside into the fork-shaped Slotted hole can be inserted. This makes it possible, the Seilendverdickung Insert directly into the locating hole without the entire rope in full length to have to pull through the mounting hole.

According to another favorable feature of the invention it is provided that the Dimensions of connector and through hole so each other are matched, that the connector from the outside into the through hole insertable and within the cable drum side of the passage opening is positively preserved. By the positive holding in the form of a grasp should an automatic detachment of this fastener from the Through hole of the drum tube can be safely avoided.

To achieve this, according to an embodiment of the invention suggested that for engaging behind the connector this at his the Through opening inwardly sweeping area with at least one is provided radially extending projection, in relation to the longitudinal axis the passage opening obliquely fitting through the passage opening is hindurchführbar and in the position of use, a pulling out of the Connecting piece locks by applying to the inner wall of the winding drum.

This type of attachment allows a quick release of the fitting of the drum, without having to screw loose and an equally fast Securing the fitting to the drum from the outside thereof, d. H. without that the drum must be accessible from the inside. Nevertheless, the connection is from Rope end and drum over the connector extremely strong and reliable, even when winding drums made of steel pipes are used.

Cheap fasteners arise when according to the invention two themselves opposite projections of the connecting piece, the passage opening so engage behind that after insertion of the connector in the through hole abut on both sides of the opening on the inner wall of the drum.

The Seilendverdickung can in a conventional manner according to the invention by a formed at the end of the rope arranged compression sleeve. These crimping sleeves are known in terms of their execution and attachment to the rope end, so they need not be explained further here.

The compression sleeves used are dimensioned to be at least 85% transmit the minimum breaking strength of the wire rope. This is the transferable Tensile force is so great that according to the valid calculation rules for Such Seilendbefestigungen no degradation of the cable traction by friction on the Drum tube is required. That means the number of fastening coils can be limited to two turns at the end of the drum to the Comply with regulations. The two turns provide additional security with regard to the rope traction force which can be broken down with this cable end attachment.

In addition, according to the invention, the thickened end of the rope in the bore be secured against slipping out of the fitting by being on the side of the fitting opposite the thickened end of the rope a clamping sleeve can be placed on the rope whose outer diameter is larger than the inner diameter of the bore. This clamping sleeve is after the Insert the thickened rope end or the compression sleeve into the extended mounting hole of the connector on the rope flush against the Moved connector and there preferably pressed. The attachment For example, by crimping using a commercial pliers, whereby the rope end is fixed non-positively in its position in the connection piece.

Before replacing the wire in case of damage must first the Clamping ring destroyed or forcibly moved. Only after the cable end can be removed with the compression sleeve from the connector become. The ropes used are therefore also in addition to the compression sleeve the loosely fitted clamping ring equipped in the same operation before the crimping of the compression sleeve is pushed over the rope end.

Another fuse of the connector is for an alternative Embodiment of the invention achieved in that an angled tab with an eye for the rope is pushed onto the rope in such a way that in the Installation position of the connecting piece of the one leg of the tab across the rope is positioned between the thickened end of the rope and the fitting and the other angled legs of the tab transverse to the passage opening in this engages and frontally adjacent to the inside of the passage opening a Levering the connection piece prevented. The tab is preferably before the crimping of the compression sleeve and optionally after pushing the Clamp sleeve pushed onto the rope and with the thickened end against the rope Pressed fitting where it passes through from the other side against the Connector pressed clamp is held.

The invention provides with little effort a fast detachable Seilendbefestigung also on winding drums made of seamless or longitudinally welded Pipes. In the wall of these tubes only has a through hole for Recording of the connection piece to be introduced, a hole that measured on a complex casting, requires minimal effort. The attachment the rope ends on the outwardly projecting fitting is possible even then when the winding drum is closed at its end faces or from others Reasons in their interior is inaccessible.

Figur 1

einen Seilzug mit einer Seiltrommel und einer erfindungsgemäßen Seilendbefestigung,

Figur 2

einen Halbschnitt durch die Seiltrommel nach Figur 1,

Figur 3

eine Ansicht U auf ein Anschlussstück einer Seilendbefestigung nach Figur 2,

Figur 4

eine Seitenansicht von Figur 3 ohne Seil,

Figur 5

eine Seitenansicht von Figur 3 mit Seil,

Figuren 6a bis 6e

den Einbauvorgang des Anschlussstückes in das Seiltrommelrohr,

Figuren 7a bis 7c

jeweils eine Ausschnittsvergrößerung von Figur 2 aus dem Bereich des Anschlussstückes und

Figuren 8a bis 8d

verschiedene Detailansichten eines Anschlussstückes in einer alternativen Ausgestaltung.

An embodiment of the invention is illustrated in the drawing and will be described below. It shows:

FIG. 1

a cable with a cable drum and a Seilendbefestigung invention,

FIG. 2

a half section through the cable drum of Figure 1,

FIG. 3

2 a view U of a connecting piece of a cable end fastening according to FIG. 2,

FIG. 4

a side view of Figure 3 without rope,

FIG. 5

a side view of Figure 3 with rope,

FIGS. 6a to 6e

the installation process of the connector in the cable drum tube,

FIGS. 7a to 7c

in each case an enlarged detail of Figure 2 from the region of the connecting piece and

FIGS. 8a to 8d

various detail views of a connector in an alternative embodiment.

1 shows a cable with a cable drum 1 or a Winding drum. On the cable drum 1, a rope 2 is preferably wire rope wound up with a cable pull S, for example, from a to be lifted Load results, is applied. The cable drum 1 is at its two opposite Ends rotatably mounted in a housing 3. At one longitudinal end of the Cable drum 1 is the rope end of the rope 2 via a connector 4 on the Cable drum 1 attached.

In addition, a concentric with the cable drum 1 is arranged in the usual way and with the along the longitudinal axis of the cable drum 1 in consequence of the up and Unwinding of the rope 2 migratory run-off point of the rope 2 of the cable drum 1 mitwandernder cable guide ring 5 is provided with a pressure roller 5a, over the in unloaded rope 2 (slack rope) a displacement of the rope 2 in the circumferential direction is prevented on the cable drum 1.

The total length L of the cable is usually carried out as small as possible and is largely determined by the drum length L1, which is composed from the usable length L4, the dead length L2 in the highest load position and the dead length L3 in deepest load position.

FIG. 2 shows a half section through the cable drum 1 at the level of the cable end attachment with the connector 4 in the operating position. The connection piece 4 is in a through hole 1 a used in the cable drum 1 and has the task on the one hand to receive the end of the rope 2 with a Seilendverdickung 2a and on the other hand for transmitting the rope forces with the cable drum 1 preferably to be positively engaged. The essentially hammerhead bolt-shaped Connector 4 is in its head area with two opposite and each radially extending projections 4c and 4d provided in the Operating position when inserted into the through hole 1a in the cable drum 1 Connecting piece 4, the inner edges of the through hole 1 a engage behind and thus find a positive fit in the through hole 1a stop. Here are the Projections 4c and 4d and the passage opening 1a are dimensioned so that the Projections 4c and 4d in relation to the longitudinal axis of the passage opening 1a obliquely fitting 4 through the through hole 1 a can be passed are (see Figures 6a to 6e), but in the operating position pulling out of the connecting piece 4 from the through hole 1 a prevent. In the Operating position is the longitudinal axis of the connecting piece 4 radially to the cable drum 1 or coaxially aligned with the axis of the through hole 1a.

At the in the management of the through hole 1 a of the cable drum. 1 outwardly projecting portion of the connecting piece 4 is the end of the Rope 2 attached. For this purpose, on the one hand at the end of the wire rope 2 a Seilendverdickung 2a mounted in the form of a compression sleeve and on the other hand in the outstanding area of the connecting piece 4 one in the operating position of the Connecting piece 4 tangentially to the cable drum 1 extending bore 4b in intended. The bore 4b is formed stepped in the longitudinal direction seen and starts from the bottom, starting with a diameter that approximates the Diameter of the rope 2 corresponds, and then widens stepwise to a Diameter, which is about the outer diameter of the compression sleeve of Seilendverdickung 2a corresponds. Due to the stepped diameter extension is a annular support surface 4e for a corresponding end face 2c of the Substantially cylindrical Seilendverdickung 2a created over the then Rope forces S are introduced into the connector 4.

Furthermore, from the figure 3, which is a view U from above on the connector 4 shows according to Figure 2, it can be seen that laterally to the two Diameter ranges of the bore 4b connected to an outwardly open slot 4a. This slot 4 a is of the projections 4 c and 4 d of the connection piece 4th straightened open. The width of the slot 4a corresponds approximately to the diameter of the rope 2, so that for mounting the Seilendbefestigung the rope 2 is not through the Bore 4 b must be threaded, but laterally through the slot 4 a in the Connector 4 can be pushed. To the rope end thickening 2a with their Face 2c in contact with the bearing surface 4e of the bore 4b to bring is then according to the rope 2 tightened through the bore 4b.

On the press sleeve 2a opposite side of the connecting piece 4 was on the rope 2, a clamping sleeve 2b pressed, which is a lifting of the Press sleeve 2a from the receiving bore 4b prevented.

In the figure 4 is an end portion of the cable drum 1 without rope 2 from the area the passage opening 1 a shown. It can be seen that the passage opening 1a is formed as a cylindrical bore.

An end section corresponding to FIG. 4 is shown in FIG. 5, however together with the rope 2 and the cable guide 5. The cable guide 5 has a spring-loaded pinch roller 5a in the vicinity of the cable drain point 6, which radially on the rope 2 and the rope 2 in the rope groove 7 of the cable drum 1 presses. Between the connector 4 and the cable drain point 6 are the turns of Seilendbefestigung, within which the cable pull S on friction in the Rope groove 7 degrades according to the Eytelwein equation. This is how it is achieved that remaining on the connecting piece 4 Restseilzugkraft only part of the original cable traction S is.

FIG. 5 also shows a part of the frame 3 which has access to the frame Interior of the cable drum 1 prevented. That shows the need for the fitting 4 form so that it is introduced from the outside into the through hole 1 a can be.

The insertion of the connecting piece 4 in the through hole 1 a is in figures 6a to 6e in individual steps in the order of the installation process shown. Visible, the connector 4 with its longitudinal axis opposite the longitudinal axis of the passage opening 1a initially tilted up to the upper radial projection 4c of the connector 4 through the through hole 1a to stick (see Figure 6a). Subsequently, the lower radial passes Projection 4d, the through hole 1a (see Figure 6b). After the radial Protrusions 4c and 4d have passed through hole 1a, becomes Connecting piece 4 in the direction of the axis of the through hole 1 a swung back, whereby the projections 4c and 4d from the inside against the wall of Create cable drum 1 (see FIG. 6c). In the next step (see Figure 6d) is the cable 2 laterally through the slot 4a (see Figure 3) in the connector 4th inserted and then the compression sleeve 2a down into the extension of the pulled approximately tangentially to the cable drum 1 extending bore 4b. To the To fix compression sleeve 2a in this position is (see Figure 6e) the previously on the rope 2 deferred clamping sleeve 2b, as indicated by the arrow P in Figure 6e, of pushed down against the connector 4 and there with a commercial Pliers crushed. As a result, then the connector 4 and the wire 2 set in this situation.

In FIGS. 7a to 7c, a detail enlargement of FIG. 2 is shown the area of the connecting piece 4 shown. These figures show that through the Choice of dimensions of the connecting piece 4, the through hole 1 a and the Seilendverdickung 2a to each other even with a flaccid rope 2 effectively prevents even if the cable guide 5 should not be present, the Connector 4 levered out of the through hole 1 a in the cable drum 1 becomes.

In Figure 7a it can be seen that in the wide part of the bore 4b of the Connecting piece 4 inserted Seilendverdickung 2a acts as a lock to to solve a loosening of the connector 4 from the through hole 1 a. The cable drum 1 side facing the Seilendverdickung 2a encloses with the connecting piece 4, in particular its upper radial projection 4 c, the Inner edge of the through hole 1a u-shaped. Since the upper radial Projection 4c tapers upwards, which also widens from the Seilendverdickung 2a and the upper radial projection 4c limited receiving gap 9 for the inner edge of the through hole 1a accordingly. The width of the gap 9 is in principle less than the thickness of the cable drum 1 and expands after above the thickness of the cable drum 1 addition. Thus is inserted Cable connection 2a, the connector 4 only by a small distance h in Circumferential direction of the cable drum 1 upwardly displaceable, so that the lower radial projection 4d can not leave the through hole 1a to the outside.

Should, contrary to expectations, the lower radial projection 4 d on the inner edge of the Through hole 1a to be in the through hole 1a, as in Figure 7b shown, the connector 4 is already slightly pivoted upwards Service. Another pivoting of the connecting piece 4, which is required for leaving the through hole 1a, however, by the in the bore 4b resting rope end thickening 2a prevented. A pivoting of the connection piece 4 is by a contact of the cable drum 1 facing the Seilendverdickung 2a limited to the outside of the cable drum 1 to an angle a, the so is low, that a further levering out of the connector 4 from the Through opening 1a is impossible.

FIGS. 8a to 8d show various detail views of a connection piece 4 shown in an alternative embodiment. Compared to the previous one Figures shown connector 4 is here a Heraushebein of Connecting piece 4 from the through hole 1 a by using a Tab 8 avoided. This tab 8 can also be used in addition. For this purpose, the tab 8 is shaped so that these at the upper inner edge of the Through hole 1a abuts and thereby prevents the connection piece 4th shifted in the circumferential direction of the drum tube of the cable drum 1 upwards can be (see Figures 8a and 8d). The tab 8 is as an angle piece formed, which is clearly visible in the figure 8d, which is a sectional view of FIG. 8c shows along the section line c-c. One of the two angles of the tab 8 is provided with an eye 10, which pushed over the wire rope 2, before the Press sleeve 2a was pressed. After the connector 4 in the in the Figures 6a to 6e shown inserted into the through hole 1a was, is the wire 2 with the pressed-compression sleeve 2a in the bore 4b withdrawn in the connector 4, wherein the tab 8, as in the figure 8d recognizable with her upwardly angled leg in the passage opening 1a inserts and fixes the connector 4 against falling out. With the others Slices a-a (see Figure 8b) and b-b (see Figure 8c) become the function of the tab 8 additionally clarified.

LIST OF REFERENCE NUMBERS

1

cable drum

1a

Through opening

2

rope

2a

cable end

2 B

collet

2c

face

3

frame

4

connector

4a

slot

4b

drilling

4c

radial projection

4d

radial projection

4e

bearing surface

5

cable guide

6

Cable departure point

7

cable groove

8th

flap

9

gap

10

eye

H

distance

L

Total length of the cable

L1

Length of the cable drum

L2

Dead length with fully wound drum

L3

Dead length with unwound rope

L4

usable drum length

P

arrow

S

line pull

α

corner

Claims (12)

Detachable fastening of a cable to a cable drum, in particular a wire rope, with a through-opening arranged in the cable drum, with a cable end thickening on the cable and a connecting piece, via which the cable with its cable end thickening is detachably fastened to the cable drum in the area of the passage opening,
characterized in that the connecting piece (4) in the through hole (1a) is releasably secured and the Seilendverdickung (2a) is releasably secured to the connecting piece (4). Detachable attachment according to claim 1, characterized in that the connecting piece (4) from the outside into the through hole (1a) is inserted and positively in the through hole (1a) is held, a part of the connecting piece (4) outwardly from the through hole (1a protrudes) and on the protruding portion of the connecting piece (4) the Seilendverdickung (2a) is positively secured. Detachable attachment according to claim 1 or 2, characterized in that the connection piece (4) is locked in the passage opening (1a) by the cable end thickening (2a) fastened to the connection piece (4). Detachable attachment according to claim 2 or 3, characterized in that the connecting piece (4) is provided in its protruding area with an approximately tangential to the cable drum (1) extending bore (4b) through which the cable (2) can be passed and on the the Seilendverdickung (2a) of the rope (2) in the longitudinal direction of the rope form-fitting (4a) can be fixed. Detachable attachment according to claim 4, characterized in that the bore (4b) is stepped and has an annular bearing surface (4e) on which an end face (2c) of the Seilendverdickung (2a) rests positively. Detachable attachment according to claim 4 or 5, characterized in that the bore (4b) along its longitudinal extent with a slot (4a) is provided which has a diameter corresponding to the diameter of the rope (2), and the rope (2) from the outside in the forked slotted hole (4b) can be inserted. Detachable fastening according to one of claims 1 to 6, characterized in that the dimensions of the connecting piece (4) and the passage opening (1a) are matched to one another such that the connecting piece (4) from the outside into the passage opening (1a) can be inserted and within the Cable drum (1) in the through hole (1a) is positively retained. Detachable attachment according to claim 7, characterized in that the connecting piece (4) is provided at its passage opening (1a) inwardly cross-section with at least one laterally and radially extending projection (4c, 4d), with respect to the longitudinal axis of the passage opening (1a) slanted connector (4) through the through hole (1 a) can be passed and in the operating position of the connecting piece (4) in which the longitudinal direction of the connecting piece (4) with respect to the cable drum (1) is radially aligned, pulling out of the connecting piece (4) from the passage opening (1a) locks. Detachable attachment according to claim 8, characterized in that two opposing projections (4c, 4d) engage behind the passage opening (1a) seen from the outside. Detachable attachment according to one of claims 1 to 9, characterized in that the Seilendverdickung (2a) of the rope (2) by a at the end of the rope (2) arranged compression sleeve is formed. Detachable attachment according to one of claims 1 to 10, characterized in that the Seilendverdickung (2a) of the rope (2) in the bore (4b) of the connecting piece (4) is secured against slipping characterized in that on the thickened end of the rope (2). 2a) opposite side of the connecting piece (4) a preferably compressible clamping sleeve (2b) on the rope (2) can be placed, whose outer diameter is greater than the inner diameter of the bore (4b). Detachable attachment according to one of claims 1 to 11, characterized in that an angled tab (8) with an eye (10) for the cable (2) is pushed onto the cable (2) in such a way that in the operating position of the connecting piece (4 ) one leg of the tab (8) is positioned transversely to the cable (2) between the Seilendverdickung (2a) and the connecting piece (4) and the other angled leg of the tab (8) transversely to the passage opening (1a) engages in this and the front side on the inside of the passage opening (1a) fitting levering of the connecting piece (4) prevented.

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