WO2005005298A1

WO2005005298A1 - Winding device for cables, particularly flat cables

Info

Publication number: WO2005005298A1
Application number: PCT/DE2004/001422
Authority: WO
Inventors: Guenter Holland-Letz; Ulrich Neumann
Original assignee: Wincor Nixdorf International Gmbh
Priority date: 2003-07-09
Filing date: 2004-07-03
Publication date: 2005-01-20
Also published as: EP1641695A1; DE10331014B3

Abstract

The invention relates to a winding device (1) for a cable (2), particularly for a flat cable(2). Said device comprises a bearing flange (3) provided with a hub (4), a winding bobbin (5) which can rotate with respect to the hub (4), said bobbin comprising, on the outer periphery thereof, a winding groove (9) for a free discharge end (2d) of the cable (2), defining a winding chamber (17) which is radially arranged inside the winding groove (9) for compensation windings (2b) of the cable (2). Said device also comprises an inner coil (10), which is arranged in a stationary manner on the bearing flange (3), and another winding chamber (16) for a spring (18) which is used as a drive element during the winding of the cable. The invention is characterised in that the winding chamber (16) for the spring (18) is axially offset in relation to the winding chamber for the compensation windings of the cable (2). An inner bobbin (10) is arranged in a fixed manner on the bearing flange (3), and at least part of the rotatable inner hub (6) of the winding coil (5) or all of the rotatable inner hub (6) of the winding coil (5) is arranged directly on the stationary hub (4) of the bearing flange (3). At least part of the stationary inner hub (11) of the inner coil (10) or all of the inner hub (11) of the inner coil (10) is arranged directly on the inner hub (6) of the winding coil (5) such that the rotatable inner hub (6) of the inner coil (10) can be guided.

Description

Winding device for cables, especially for flat cables

The present invention relates to a winding device for cables according to the preamble of claim 1.

According to DE 198 11 423 AI b, the spring is located centrally in the hub area and within the smaller diameter of the inner winding space in the same plane as the optical fiber cable used here.

In relation to the axis of rotation of the winding drum, this results in a structure in which the spring is arranged in the smallest diameter range. This area is adjoined radially outwards by the winding space for compensating windings of the cable and in turn by the outer circumference of the winding groove or the winding ring for a free withdrawal end of the cable.

According to EP 0 503 315 B1 of the generic type, which has no inner coil but in which the compensating windings attach directly to the inner hub, the latter, on the other hand, is axially offset next to the winding space for the cable, which can also be a flat cable. This cable is fed through the center of the hub. The particular partition arrangement between the spring and the winding space arrangement for the cable is relatively complicated and therefore expensive to manufacture and may be expensive. susceptible to interference.

In contrast, the present invention is based on the object of developing the generic winding device in such a way that it has a simple and compact construction with good and permanently reliable function. In principle, it should also be possible to use a hub with a relatively large diameter.

According to claim 1, the rotatable inner hub of the winding spool is arranged at least in sections or completely (concentrically) directly on the stationary hub of the bearing flange and a stationary inner hub of the inner spool is arranged at least in sections or completely (concentrically) directly on the inner hub of the winding spool, so that the rotatable Inner hub of the winding spool is guided between the fixed hub and the fixed inner hub of the inner spool. On the one hand, this arrangement is particularly compact and, on the other hand, it also enables a hub with a relatively large inner diameter to be used. In addition, good guidance and rotatability of the winding spool is ensured, since its inner hub is arranged and guided securely and well between the actual inner hub and the inner spool over most of its axial length. The advantageous arrangement of the elements of the hub, winding spool and inner spool also simplifies the assembly of the entire winding device.

By arranging the spring next to the cable, there is also the possibility of being able to design the size and the diameter range of the spring and thus ultimately its spring characteristics independently of the requirement to have to arrange the spring within a range which is related to its diameter is smaller than the inner diameter of the inner winding space. In particular, there is space for a spring, which also permits a large number of revolutions, if this is desired. Another advantage of this measure is that by laying the spring "alongside" the coil is also created space for a relatively large hub, if this is desired for design reasons.

Spring-operated winding coils are also known, which are spring-actuated, the spring lying next to the actual coil space, so from DE 36 14 880 and EP 0 503 315 B1.

The cable is preferably guided in a simple manner through the bearing flange and the inner coil into the winding space for the cable, in this case being fixed in place with a section on the inner coil, then guided around the inner coil to form the compensating windings. before it passes through the winding spool to the outside, on which it is fixed with a further section, before it is guided into the winding groove and is wound here to the free take-off end that can be wound up and unwound.

The spring - a torsion spring - is preferably designed as a spiral spring or as a mainspring. A mainspring has the particular advantage that a uniform winding tension is generated over several revolutions and the windings of the mainspring as well as the compensating windings of the cable (see description of the figures) are located inside and outside in the winding space depending on the operating state. In contrast, a spiral spring has windings which are distributed spirally over the winding space with little contact, so that there is a mode of operation with little hysteresis. The spiral spring has a more rising characteristic curve and is more suitable for fewer turns than the mainspring. The spring tension of the spring is preferably set in such a way that the flat cable remains under tension even during dynamic processes, but on the other hand imposes as little stress on the driving operation of the transport module as possible or does not impair it.

The flat cable preferably has multi-pole, rolled copper flat conductors which are covered on both sides with insulating film - e.g. Polyester film - are laminated. Such flat cables are particularly flat and compact and can be wound "evenly like a tape" on the winding device. A special feature of these cables, in contrast to the light guides of the prior art, is that they are quasi "foldable", an effect which the invention uses in a special way when fixing the cable to the winding device.

In an advantageous embodiment, the winding spool preferably has the inner hub, a radial wall and an outer hub on which the winding groove is formed, with a passage for the cable from the winding space into the winding groove on the outer hub via a peripheral portion of the outer hub in the latter. The cable is rich of the passage from the winding space for the cable into the outer receiving groove for the cable with a Z-shaped fold and thus fixed in the area of the passage. The cable is thus fixed in a simple manner without additional structural measures simply by the z-shaped fold in the area of the passage.

The inner coil is preferably provided with a cable bushing through which the cable can be easily guided from the outside through an opening in the bearing flange into the winding space for the cable. The cable can be fixed in the cable bushing in the simplest way by means of a right-angled fold and in turn without additional design effort.

A pawl is preferably arranged in the winding space, which is pivotally mounted with one of its ends on the outer circumference of the inner hub of the inner coil and is aligned such that its free end engages between the first inner equalizing turn and the further equalizing turns of the cable in order to form a loop simple to prevent and to avoid unwanted rotary movements of the winding spool below a limit torque. It is advisable for this if the pawl is arranged next to the end of the cable passage into the winding space for the cable. The pawl is set up by a "hump" of the cable and presses the outer compensating windings of the cable radially outward in a simple manner and thus effectively prevents the formation of loops and thus contributes to the safe function.

According to a further variant of the invention, the winding spool, the pawl, the cable, the inner spool and preferably the (working) spring and the cover plate form a preassembled assembly which protects and secures the drive spring and which in its entirety, for example, on the hub of the bearing flange an ATM can be snapped on. The winding device is particularly preferably part of a transport and separating device for banknotes of an ATM, the cable is a foldable flat cable with flat conductors, the bearing flange is designed as a wall of the transport and separating device, and the free withdrawal end is connected to a movable transport module of the transport and separating device. The flat cable of the winding device is used in a simple manner to supply electrical motors to transport modules for banknotes in cash machines without electrical contact (not shown here). Such transport modules commute, for example, in ATMs on curved tracks over short distances (for example 1 m or less) between a loading and unloading station for the notes of value (likewise not shown here). The winding device thus considerably simplifies the energy supply to the transport modules.

Further features of the invention are specified in the remaining subclaims.

An embodiment of the invention is illustrated in the accompanying drawings and is described in more detail below,

Show it:

FIG. 1 shows a perspective view of a winding device according to the invention, FIG. 2 shows a cross section through the winding device according to FIG. 1,

FIG. 3 shows a section along line A-A with the cable completely wound,

FIG. 4 shows a section corresponding to FIG. 3 with the cable completely unwound,

FIG. 5 shows a view of the receiving chamber for a spring of the winding device, which is tensioned when the cable is unwound and relaxed when the cable is wound up. 6 shows a view corresponding to FIG. 5 with a cover plate placed on the receiving area of the spring.

In the drawings, the reference numeral 1 designates a winding device for cables, in particular for flat cables 2. In particular, a particularly advantageous foldable flat cable with flat conductors is used here.

The winding device 1 has a plate-shaped bearing flange 3, to which a hub 4 is attached or molded. The bearing flange 3 can also be part of a superordinate component, e.g. as a section of a housing wall or the like be (not shown here).

1, for example, the bearing flange 3 has a slot 22 which is formed radially inside the hub 4 and runs through the center of the hub 4 and into which a further assembly (not shown here) or the like of an ATM can engage.

On the outer periphery of the hub 4, a winding spool 5 is directly rotatably mounted, which has an inner hub 6 arranged coaxially on the hub 4 and rotatable relative to this, to which a radial wall 7 extending parallel to the bearing flange 3 and extending radially outward is connected , which also serves as a cover area on the side of the winding device 1 facing away from the bearing flange 3 and on the radial end area of which an outer hub 8 is formed in the direction of the bearing flange 3, so that the winding spool 5 essentially has a U-shaped cross-sectional geometry. In the stepped cylindrical outer hub 8, a receiving groove 9 for the cable 2 is formed over part of the axial length in the area facing away from the bearing flange 3, over half the axial length of the outer hub 8 on its outer circumference. In the radial area between the inner hub 6 and the outer hub 8 of the winding spool 5 there is also a T-shaped inner spool 10, which is non-rotatable or fixed relative to the bearing flange 3 and which has a cylindrical inner casing 11, which in turn is coaxial outside the inner hub 6 of the coil element 5 is arranged and does not rotate with it, so that the inner hub 6 is arranged compactly and guided securely.

The T-shaped inner coil 10 is non-rotatably connected to the bearing flange 3, which is also stationary during operation, a lateral extension 12 with a cable bushing 13 of the inner coil engaging in an opening 14 in the bearing flange 3, which is arranged radially outside the hub 4 of the bearing flange 3 is. A radial extension 23 extends on the bearing flange 3 next to the inner hub 6 to the hub 4 of the bearing flange 3 radially inwards.

According to FIG. 2, a partition wall 15 also extends approximately from the center of the inner hub 11 of the inner coil radially outward to the inner periphery of the outer hub 8 of the winding spool 5. This partition wall 15 divides the space inside the outer hub 8 of the coil element 5 into two axially adjacent winding spaces 16, 17.

One of these winding spaces 16, 17 - here the (left) winding space 16 adjoining the bearing flange - serves to receive a spring 18 which functions as a drive for the winding spool 5 when winding the cable 2, whereas the second - here that of the bearing flange 3 Winding space 17 facing away - serves to accommodate an area of the cable 2.

In detail, the cable 2 is arranged here on the winding device as follows.

The flat cable 2 is fed from outside the winding device 1 and through the opening 14 and the side extension 12 with the cable duct 13 of the inner coil 10 into the winding space 17 facing away from the bearing flange 3. leads. The cable 2 fed from the outside is fixed to the cable duct 13 with a first section 2a, for example by a right-angled folding on the cable duct 13. Here the foldability of the cable 2 with flat conductors with insulating foil lamination has an advantageous effect. Then it is wound in the winding space 17 for the cable 2 by more than one turn - as required - around the inner coil 10, so that several compensating windings 2b (see in particular FIGS. 3 and 4) form in this winding space 2.

The winding space 17 on the right in FIG. 3 is provided on its outer circumference in the outer hub with a quasi-tangential or slot-like passage 26 in the outer hub, through which the cable 2 is guided from the winding space 17 into the winding groove 9. The cable 2 can in turn be fixed to the passage 26 with its section 2c running in the passage 26 - e.g. clamped by a z-shaped fold 24, so that the cable 2 has a defined, constant winding area on the winding groove 9. The free withdrawal end that can be unwound from the winding groove 9 or that can be wound onto the winding groove 9 is designated in FIG. 1 by the reference symbol 2d.

In this way, a perfect separation between the compensating windings 2b in the inner winding space 17 and the free withdrawal end 2c located on the winding groove 9 is created in a particularly uncomplicated manner.

Within the right winding space 17 for the cable 2, a pawl 21 is pivotally mounted on the inner hub 11 of the inner coil 10. The pawl 21 is arranged here on the outer circumference of the inner hub 11 of the inner coil 10 next to the exit of the cable bushing 13 in the winding space 17 for the cable 2 in such a way that its free end, which is essentially tangential in FIG. 4, lies between the first, inner turn and the second turn of the compensating windings 2b of the cable 2 engages. Through the installed flat cable arch between the cable entry 13 and the outer turn closest to the pawl presses the second and further turns of the cable 2 somewhat radially outward. The pawl 21 thus prevents a loop formation of the compensating windings 2c of the cable 2 and prevents unwanted rotational movements of the winding spool 5 beyond its basic position.

The function of the winding device 1 is as follows.

If the free withdrawal end 2d of the cable 2 is unwound - e.g. during a translation of a transport module to which the free take-off end 2d is connected - the compensating windings 2b in the right winding space 17 for the cable 2 contract inwards, since the cable is fastened to the stationary inner coil 10 inside the winding space and the winding spool 5 , on which the cable is also fixed at the passage 26, rotates correspondingly relative to the inner coil 10.

When the free pull-off end 2d is completely pulled off the winding spool 5 or its outer winding groove 9, the compensating windings 2b in the inner winding space 17 are contracted to their smallest diameter. The pawl 21 then lies on the inside towards the inner hub 11 of the inner coil 10. This situation is shown in Figure 4.

In the wound state, the flat cable turns are received on the large outer diameter of the winding groove 9, the self-resilience of the cable 2, which wants to assume the largest radius of curvature, and the shear rigidity and the smooth surface of the insulating film of the flat cable 2 have a supporting effect.

If, however, the free withdrawal end 2d of the flat cable 2 is completely wound on the winding groove 9, as shown in FIG. 3, the compensating windings 2b lie against the largest diameter range of the winding space 17. The pawl 21 is then set up correspondingly in the direction of the outer diameter of the inner winding space 17 and brakes or blocks a further rotation. Hung the winding drum 5 so that the winding spool 5 does not twist in an uncontrolled manner, as long as a lower limit torque, for example when transporting the transport module, is not exceeded.

In the winding space 17 there is therefore an angle of rotation compensation analogous to the principle of spiral springs.

In the further winding space 16 for the spring 18, which is arranged axially offset to the winding space 17 for the cable and which has one end of it on the winding spool 5 and the other end of it on an area which is stationary with respect to the winding drum 5 - e.g. is connected to the inner spool 10 - this is drawn together and tensioned in the right winding space in accordance with FIG. 4 when the free withdrawal end 2d of the cable 2 is unwound from the winding groove 9 analogously to the compensating windings 2b.

The spring 18 thus serves as an energy store, which again releases its energy for winding up the cable - for example when the transport module of the ATM moves back in the direction of the winding device. The spring 18 relaxes and widens, which rotates the winding spool 5 and winds the free take-off end 2d back onto the winding groove 9.

The spring 18 - in particular a mainspring as a torsion spring - is secured within the left winding space 17 by a cover plate 25 covering the winding drum 5 towards the bearing flange side against jumping out of the inner coil 11.

During assembly, the cable 2 is first fixed to the inner spool 10 and the winding spool 5 and then the spring 18 is inserted and fastened before the cover plate 25 is snapped on.

The winding coil 5, the stationary inner coil 10, the cable

2, the spring 18 and here also the pawl 21 form an assembly according to FIG. 6, which on its open axia- len side is closed by the cover plate 25 and in its entirety can be snapped onto the hub 4 of the bearing flange 3, where it is, for example, by resilient snap arms 27 with hook-like projections 28 which are distributed on the circumference of the hub 4 and behind the radial wall 7 grip the winding spool 5 is held. This results in a simple and easy to carry out assembly and disassembly.

LIST OF REFERENCE NUMBERS

Winding device 1

Flat cable 2

End area 2a

Compensating windings 2b

Deduction end 2d

Bearing flange 3

Hub 4

Winding spool 5

Inner hub 6

Radial wall 7

Outer hub 8

Winding groove 9

Inner coil 10

Inner hub 11

Approach 12

Cable bushing 13

Opening 14

Partition 15

Baby changing rooms 16, 17

Spring 18

Pawl 21

Slot 22

Radial approach 23

Folding 24

Cover plate 25

Passage 26

Snap arms 27

Projections 28

Claims

claims

1. winding device (1) for a cable (2), in particular for a flat cable (2), with a) a fixed bearing flange (3) with a fixed hub (4), b) a rotatable relative to the hub (4) Winding spool (5), which has on its outer circumference a winding groove (9) for a free withdrawal end (2d) of the cable (2) and which has a winding space (17) arranged radially inside the winding groove (9) for compensating turns (2b) of the Cables (2) limited, c) a further winding space (16) for a spring (18), which serves as a drive for the winding spool (5) when winding up the free pull-off end (2d) of the cable (2), d) the winding space ( 16) for the spring (18) axially offset from the winding space (17) for the compensating turns of the cable (2), characterized by e) an inner coil (10), f) fixed to the bearing flange (3), a rotatable inner hub (6 ) of the winding spool (5) at least in sections or completely directly on the fixed hub (4) of the bearing flange (3) and a stationary inner hub (11) of the inner spool (10) is arranged at least in sections or completely directly on the inner hub (6) of the winding spool (5), so that the rotatable inner hub (6) of the winding spool (5) is located between the fixed hub (4 ) and the stationary inner hub (11) of the inner coil (10) is guided.

2. Winding device according to claim 1, characterized in that the cable a) is guided through the bearing flange (3) and the inner coil (11) into the winding space (17) for the cable (2), b) being on the inner coil ( 11) is fixed in place with a section (2a), c) is then guided to form the compensating windings (2b) around the inner coil (11), d) before it passes through the winding coil (5) to the outside, at which it is connected with a Another section (2c) is defined before it is guided into the winding groove (9) and is wound here to the free withdrawal end (2d) that can be wound up and unwound.

3. Winding device according to claim 1 or 2, characterized in that the spring (18) is a spiral spring.

4. Winding device according to claim 1 or 2, characterized in that the spring (18) is a mainspring with a flat ribbon-like cross section.

5. winding device according to claim 2, 3 or 4, characterized in that the flat cable (2) has multi-pole, rolled copper flat conductors, which on both sides with insulating film - e.g. Polyester film - are laminated.

6. Winding device according to one of the preceding claims, characterized in that the winding space (16) for the spring (18) is axially closed by a cover plate (25).

7. Winding device according to one or more of the preceding claims, characterized in that the winding spool (5) has the inner hub (6), a radial wall (7) and an outer hub (8) on which Rather, the winding groove (9) is formed, with a passage (26) for the cable from the winding space (16) into the winding groove (9) on the outer hub (8) over a peripheral section of the outer hub (8) in the latter.

8. Winding device according to one or more of the preceding claims, characterized in that the cable (2) in the region of a passage (26) from the winding space for the cable (2) into the outer receiving groove (9) for the cable with a particular Z. -shaped fold (10) and fixed in the area of the passage (23).

9. Winding device according to one or more of the preceding claims, characterized in that the inner coil (11) is provided with a cable bushing (13) through which the cable through an opening (14) of the bearing flange (3) in the winding space ( 17) is feasible.

10. Winding device according to one or more of the preceding claims, characterized in that the cable (2) is fixed in particular by a right-angled folding in the cable bushing (13).

11. Winding device according to one or more of the preceding claims, characterized in that from the inner hub (11) of the inner coil 10) radially extends a partition (15) to the outside, which space between the inner hub of the inner coil (10) and the outer hub (8) of the winding coil into the first winding space (16) for the spring (18) and the second winding space (17) for the compensating windings (2b) of the cable (2).

12. Winding device according to one or more of the preceding claims, characterized in that in the winding space (17) a pawl (21) is attached is arranged, which is pivotally mounted at one end on the outer circumference of the inner hub of the inner coil (10) and is aligned such that it engages with its free end between the first inner compensating winding and the further compensating windings (2b) of the cable (2).

13. Winding device according to one or more of the preceding claims, characterized in that the pawl (21) is arranged next to the end of the cable passage (13) in the winding space (17) for the cable (2).

14. Winding device according to one or more of the preceding claims, characterized in that the winding spool (5), the pawl (21), the cable (2), the inner spool (10) and the spring (18) one through the cover plate (25 ) form pre-assembled assembly, which can be snapped onto the hub (4) of the bearing flange (3) in its entirety.

15. Winding device according to one or more of the preceding claims, characterized in that the winding device is part of a transport and separating device for banknotes of value, the cable is a foldable flat cable with flat conductors, the bearing flange (3) as a wall of the transport and separating device is formed and wherein the free withdrawal end is connected to a movable transport module of the transport and separating device.

16. Winding device according to one or more of the preceding claims, characterized in that the spring (18) is fixed with one of these ends on the stationary inner coil (10) and with the other end on the rotatable winding coil (5).