DE2900187A1 - Winding and unwinding device for crane feed cables - has motor driven drum with compartments for paid-out and return cables and has pneumatic or hydraulic lines - Google Patents

Abstract

The device has a motor driven drum (10) around which the cable can be wound or unwound as the crane, or other moving load moves towards or away from the fixed connection at the other end of the cable. The drum is divided into compartments (22) so that it can not only accommodate electrical cables, paid out or rewound, but also a hose for a pneumatic or hydraulic supply. The drum side ends of the paid our or rewound cables are connected directly together, with the paid out cable (40) forming a loop (42). The cable is preferably a flat cable and is wound around a part of the drum that is smaller in diameter than the part around which the cable is rewound.

Description

Winding device for winding and unwinding cables

The invention relates to a winding device for winding and unwinding of lines moving from fixed connections to movable connections, e.g. a crane, with one of a motor, preferably a torque motor, driven winding drum.

In many cases, moving equipment such as excavators, cranes, E.g. a spreader bridge crane for container transport, over lines with stationary Connection points connected. These lines can be electrical cables act about which either information (measurement data, control commands) or electrical Benefits are transferred. But it can also be hydraulic or pneumatic Act hose lines, via which pressure medium to drive actuators is transmitted to the mobile equipment. With such devices are the Cables are usually wound on reels by a torque motor are driven so that the line is wound or unwound in accordance with this movement and is essentially taut.

A torque motor is a motor that works on the drum constant exerts a torque in the winding sense against which the lines of the Winding drum can be withdrawn.

The torque motor thus acts like an "electric spring in known Devices are for electrical cables on the one hand and pneumatic and / or hydraulic Hose lines on the other hand, each provided with separate winding drums. Every this winding drum requires a separate torque motor. That requires a not inconsiderable technical effort.

It is still necessary to have a connection between the fixed Connections and the wound and unwound, i.e. rotating with the winding drum Establish line.

For lines for energy and signal transmission (measuring and control lines) becomes a connection between a fixed and one with the winding drum rotating line via slip ring contacts. Such slip ring contacts are prone to failure and can lead to errors, especially with electronic commands and carry signals.

They are drums without slip rings for the transmission of electrical currents has been provided. With these slip-ring-less drums, a single cable is used from a wrapping arm that rotates around a non-rotating drum body into the The winding space of the drum is pulled in or out of this. Anyone can do this Drum only one cable can be wound The cable must be a round, relatively thin cable which only contains a small number of wires to match the dimensions of the To keep the winding drum with the wound cable within acceptable limits.

It is also a winding device for winding or unwinding one Supply cable for height-adjustable lights known (US-PS 3 807 648), at which the winding drum is formed by a double drum. To a first changing room the Double drum becomes a feeder cable and on a second In the winding room, a drain cable is wound up, with the supply cable along with it is connected to a power supply and on the drum side the supply and drainage cables are firmly connected to each other. The diameters of the winding drum are in the two Changing rooms different. The supply cable forms a loop and is in wound around the winding room with the smaller diameter. With such an arrangement The supply and discharge cables rotate with the winding drum so that they are fixed can be interconnected and in practice parts of a single continuous Form cable.

The difference in diameter ensures that the loop, which is formed by the supply cable, only when the lamp is moved enlarged to a small extent compared to the way of the lamp.

Known winding drums for hose lines, via the pneumatic or hydraulic energy is to be transmitted, contain rotating unions, via which the connected to a fixed pneumatic or hydraulic connection Hose line with the drum-side end of the wound, to a movable one Connection leading hose line is connected. Usually a one-way rotary feedthrough is used intended. It is also known to have two different hose lines on a winding drum wind up the one-way rotary feedthrough provided at each end of the drum with the hose line led to the fixed connection (supply hose line) are connected.

The invention is based on the task of supplying electrical and to simplify hydraulic or pneumatic lines to movable equipment.

According to the invention this object is achieved in that on a single Winding drum in separate winding rooms (a) at least one electrical supply cable for establishing a connection from a fixed connection, (b) at least a drain cable for connection to a movable connector and (c) at least one hose line for producing a pneumatic or hydraulic hose connection to a movable pneumatic or hydraulic connection are wound that the drum-side ends of the electrical supply and Downstream cables are directly connected to each other, the feed cable forms a loop, and that one with a fixed pneumatic or hydraulic connection connected hose line in a manner permitting the winding movement with the drum-side end of the wound hose line is connected.

According to the invention is thus for electrical cables and pneumatic or hydraulic hose connections only a single winding drum is provided, which follows the movement of the equipment by means of its drive. On this only one The winding drum is both an electrical supply cable and a discharge cable wound up, whereby these two cables are connected to each other and the supply cable forms a loop. So it is a slip ringless electrical cable connection Manufactured via the winding drum to the movable equipment. The same winding drum carries a hose line, which in a manner permitting the winding movement a supply hose line is connected. That can have a Rotary union happen. But it can also be the hose lines in the same Way as the electrical cables are connected to each other by including the supply hose line is wound on the winding drum in a winding room.

On the single winding drum, a variety of electrical and hose lines must be coiled.

Further refinements of the invention are the subject of the subclaims.

The invention is referred to below using an exemplary embodiment explained in more detail on the accompanying drawings: Fig. 1 shows an end view of a formed according to the invention winding device.

Fig. 2 shows an associated side view.

A winding drum 10 is used to line connections from a fixed station 12 lead to a movable device 14 to record and in accordance with the movement of the equipment 14 in the direction of the double arrow 16 wind up or unwind. The line connections can be electrical measuring or control lines, electric power lines, hydraulic or pneumatic hose connections be. As can best be seen from Fig. 2, the winding drum 10 includes a cylindrical drum body 18 and a plurality of spaced apart radial guide flanges 20, between which the winding spaces 22 are formed. The guide flanges 20 are arranged so that in the winding spaces 22 the lines 24 wound spirally in a radial plane are. It can thus wound up in a larger number of winding rooms 22 different lines will. The winding drum further includes a drum body 26 between two Guide flanges 28.30. The drum body 26 has a much smaller diameter than the drum body 18.

The winding drum 10 is driven by a drive motor 32, which is a hydraulic Axial piston motor can be driven via a gear 34.

A rotary leadthrough 36 is flange-mounted within the drum body 18.

In the winding space formed between the guide flanges 28 and 30 38 is an electrical feed cable 40 formed by a flat cable on the Drum body 26 wound, which has the smaller diameter. The flat cable is led to a fixed connection. It forms between the connection and the winding drum 10 has a relatively short loop. The flat cable 40 is wound so that that the individual turns lie on top of one another in the radial direction, the diameter of the coil increases less than this with an increasing number of turns would be the case with a round cable. A drain cable attached to one of the changing rooms 22 is wound up and designed as a round cable, is directly with the flat cable 40 connected. When the equipment 14 is moved, the winding drum 10 is driven, wherein the drain cable, e.g., cable 24 in Fig. 2, coils or unwinds and with the simultaneous winding or unwinding of the flat cable 40 itself the loop 42 formed by this enlarged more or less, as in figure 1 is indicated. Because of the difference in diameter of the drum bodies 26 and 18, which is reinforced by the use of flat or round cables relatively large movement of equipment # 14 only a comparatively in addition slight enlargement or reduction of the loop 42. In a similar way can have several electrical connection lines both for signal transmission and also run as power lines from a fixed connection to the equipment 14 will.

The supply cable can point in the same direction as the drain cable the winding drum 10 be wound up.

The rotary feedthrough 36 is designed as a multi-way rotary feedthrough, to which several supply hose lines 44, 46, 48, 50, 52 are connected and over which these supply hose lines with associated, in changing rooms 22 wound discharge hose lines are connected.

It is also possible that the with a fixed pneumatic or. Hydraulic connection connected hose line (supply line hose line) in one Winding space 22 of the winding drum 10 with the formation of a loop similar to a loop 42 is wound up and that the drum-side ends of the supply hose line and the wound, to a movable pneumatic or. Hydraulic connection guided Hose line (discharge hose line) are directly connected to one another.

Another modification is that when the equipment is moved out 14 from its basic position first the flat cable 40 (or a correspondingly winding cable Supply hose line) is completely unwound from the drum body 26. When the equipment 14 reaches a middle position, the flat cable 14 is then with the reverse winding direction wound back onto the drum body 26 so that the previously formed loop 42 is caught again. In this way you can the size of the loop with a given path of the equipment 1-4 and given Diameter difference between the drum bodies 18 and 26 to about half to reduce.

If multiple flat cables are required, they can be used to save space be wound in a package in a winding room 38, i.e. the flat cables are laid one on top of the other and the package of cable 40 thus formed is wound up.

Claims (11)

Claims winding device for winding and unwinding cables, from fixed connections to movable connections, e.g. on a crane, are guided, with a winding drum driven by a motor, characterized in that that on a single winding drum (10) in separate winding spaces (22) (a) at least an electrical feed cable (40) for connecting one fixed connection, (b) at least one drain cable for the production of a Connection to a movable connection and (c) at least one hose line for the production of a pneumatic or hydraulic hose connection to a movable pneumatic or hydraulic connection are wound that the drum-side Ends of the electrical feed and discharge cables are directly connected to one another are, wherein the supply cable (40) forms a loop (42), and that one with hose line connected to a fixed pneumatic or hydraulic connection (44,46,48) in a manner permitting the winding movement with the drum-side End of the coiled hose line is connected. 2. Winding device according to claim 1, characterized in that the electrical supply cable (40) on a winding space of the winding drum (10) is wound, the drum diameter is smaller than the drum diameter of the winding room that accommodates the discharge cable. 3. Winding device according to claim 2, characterized in that the electrical supply cable (40) is formed by a flat cable, the individual Windings lie on top of one another in the radial direction. 4. Winding device according to claim 1, characterized in that several flat cables are wrapped in a package in a changing room. 5. Winding device according to claim 3 or 4, characterized in that that the discharge cable is formed by a round cable between two radial Guide flanges (20) is spirally wound in a radial plane. 6. Winding device according to claim 5, characterized in that the winding drum (10) a plurality of spaced apart radial Has guide flanges (20), between which several cables and / or hose lines are led. 7. winding device according to one of claims 1 to 6, characterized in that that the supply cable is in the same direction as the drain cable on the winding drum (10) is wound up. 8. winding device according to one of claims 1 to 6, characterized in that that the supply cable in a starting position is in the same direction as the discharge cable fully is wound on the winding drum in a central position is completely unwound with the formation of a maximum loop and in the further Movement of the winding drum while pulling in the loop with reverse winding direction is rewound. 9. winding device according to one of claims 1 to 8, characterized in that that a rotary feedthrough (-36) is provided inside the winding drum (10), via which the connected to a fixed pneumatic or hydraulic connection Hose line (44,46,48) with the drum-side end of the wound hose line connected is. 10. Winding device according to claim 9, characterized in that the rotary leadthrough (36) is a multi-way rotary leadthrough through which more than two hose lines each connected to a fixed pneumatic or hydraulic connection (44,46,48) with the drum-side end each one wound hose line connected is. 11. Winding device according to one of claims 1 to 8, characterized in that that even those with a fixed pneumatic resp. Hydraulic connection connected hose line (supply hose line) wound in a winding space of the winding drum to form a loop and that the drum-side ends of the supply hose line and the wound, to a movable pneumatic or hydraulic connection hose line (Drain hose line) are directly connected to each other.