DE102005057936A1 - Electrical device connection cable e.g. safety cable, for e.g. scarifier, has casing with cover contour, where dimension of contour is selected and arranged such that cable in each axial layer is free from contact region of two tools - Google Patents

Abstract

The cable has a casing (3) enclosing an electrical supply line (2) and having a cover contour (4). The dimension of the contour is selected and arranged such that the cable in each axial layer is free from contact region of two tools that work together. The dimension and/or material choice of the casing is selected such that the cable has specific deformation in reversible region with respect to a load of 100 Newton.

Description

The The invention relates to a wound on a cable drum electrical Cord, in particular a safety cable for mobile equipment, in detail with the features of the preamble of claim 1.

Mobile implements for outdoor use are known in a variety of designs. This includes numerous tools, with which separating operations with certain cutting is executable. These include hedge trimmers, bar lawn mowers, sickle lawn mowers, scarifiers with vertical cutting knives, etc. These include as an engine, an electric motor via an electrical supply line usually in the form of a cable with a power supply device, such as a stationary source via a house connection or with the house connection coupling cable drum or extension cable is connectable. The cables used are often damaged by the cutting tools or even severed. This severing is caused by a large number of accidents, some of which cause serious damage to the health of the user of the implement. A big problem is especially with electric hedge trimmers. The severing represents a high safety risk in terms of electrical shock to the user, firstly by the severing itself and secondly because often after repair no expert repair takes place, which in turn can lead to consequential damage. Although there is a legal requirement that such network connections are secured with a F _i switch. However, this is often not known in practice or such F _i device is simply not available, since an installation on buildings mandatory mandatory only since 1984. Often the F _i switch only responds when the cable is actually cut, ie the current flow is interrupted. The reliability of such F _i switches is also essentially dependent on the regular performance of a control operation. This includes a manual release at predetermined intervals, usually once a year. If this check is not carried out, the switch contacts may stick together and the protective function is no longer ensured. Furthermore, mobile work tools are used locally bounded, so that eliminates the use of customary in the interior of cable drums, since they are plugged into a building-side power supply and the cable drum is then rolled out to the device. In this respect, then at least one extension cable or a second person carries the cable drum, but this is at least out of place, that is mobile devices such as hedge trimmers or lawn mowers rather exclude. The extension cables usually have no take-up device, which is to be regarded as a further disadvantage and also increases the risk of accidents. Particularly critical is the winding of cables in cutting tools with horizontally rotating main axes, which are provided with vertically cutting tools, considered because there is a risk that the cable has been damaged, but is also unwound by the user. This is particularly critical because the tools are made of steel and the otherwise provided electrical protection against electrical shock then do not work. For devices with permanently installed cable also has the disadvantage that the device must be opened in case of damage to the cable to renew it. This is only permitted by the skilled person and thus leads to undesirable repair times and high costs.

There often the cable is severed in hedge trimmers or lawnmowers is the effort in permanently installed cable unacceptable. Further Determines the packaging size for devices with fixed installed Cable also by the smallest permissible winding diameter such Electric wire.

To solve this problem was in DE 196 32 693 A1 for manually movable implements, which are designed with a powered by an electric motor, which is supplied by an electrical supply line, drivable cutting device, proposed that the electrical supply line is assigned at least at a near-equipment section and vulnerable area a shell whose diameter D larger than the maximum clear input width of the open in the feed direction gap of the implement is. However, a major disadvantage of this design is that on the one hand, the sheathed supply line connected directly to the mobile implement or the electric motor is clamped and thus has a certain length, which is selected depending on the device has. However, this chosen length can never be tailor made for the most varied lot sizes and the conditions prevailing there. The mobile work tool with the security cable is very unwieldy when unwinding and storing. With hedge trimmers, for example, the size of the packaging is determined by the volume of the cable, which leads to additional costs. Furthermore, the base unit is made more expensive by the cable, which entails a competitive disadvantage. Furthermore, damage requires a costly replacement. In particular, for existing equipment retrofitting or retrofitting is usually not economical, so that these devices under the aspect of safe Then you should not continue to use it. Furthermore, in case of damage or defect due to the integrated design of the cable replacement is very expensive.

From the pamphlets US 6,018,874 and US 5,993,249 are electrical safety cable with a jacket previously known, which are tradable as independent components and can be electrically coupled with different devices. In this case, the safety cable to an electrical supply line with both sides arranged electrical connection devices, wherein the electrical supply line is enclosed by a sheath. One of the electrical connection devices can be brought into operative connection with a complementary electrical connecting device on the working device. However, a significant problem is the space-saving storage for longer cables. Also can cause partial longitudinal deformations by occurring in practice tensile forces on these safety cables, for example by friction in the grass or by deflections. These tensile forces act as a circumferential force when winding on a drum, which has a deformation of the shell result. This is particularly critical at high temperatures, for example up to 55 ° C due to solar radiation. Another major problem is the time factor for recoverability. The factory solves the problem to the extent that by circumferential stress-free or at least defined permissible circumferential forces are used during winding. With the end user, however, the corresponding cable is often stored unused for several months. The jacket can be under high winding longitudinal and transverse stress. The sheathing must meet these stresses, ie it must largely re-assume its original shape when rewinding, in such a way that the serviceability is ensured.

Of the Invention is therefore based on the object, a on a cable drum Wind-up safety cable for mobile equipment, in particular an electrical appliance connection cable for mobile tools, especially garden tools, to develop, which in the case of an accidental severing prevents and the comfort of a take-up in different Offers variants. The safety cable should be easy to handle be and for a variety of different types of equipment suitable and usable be. Furthermore, the security cable is also easy to different national standards be customizable and storable in a space-saving manner. The jacket the safety cable should be carried out in such a way that the entire Safety cable is easy and inexpensive to produce and further has high flexibility, a trouble-free To ensure work when connecting to a working device. Furthermore, should the windability of the cable to be secured so that a the usability disturbing Deformation even when stored for months is excluded.

The inventive solution characterized by the features of claim 1. advantageous versions are in the subclaims described.

For mobile tools, especially hedge trimmers, scarifiers, lawnmowers, chainsaws etc., becomes a separate, that is as a separate item, especially separately traded and storable and to the mobile implement connectable electrical appliance connection cable provided, comprising an electrical supply line, respectively an electrical connection device at each end region, wherein this is electrically coupled to the supply line and a, the supply line enclosing Sheathing. This is according to a first execution fixed, preferably non-rotatable, with the electrical connection devices connected, according to one second fixed, preferably non-rotatable with the supply line. in the Last case, a relative movement in the axial direction between Sheath and supply line be allowed or prevented become. With permitted relative movement, this is at least through limited the electrical connection devices.

The casing is characterized by an envelope contour, which is designed in such a way that, especially for mobile implements in the form of hedge trimmers, it can not get into the engagement region of the two tools working against each other, in particular between two mutually working cutting edges. In other words, when touching the blades of one blade, there must be no contact with the other blade movable against these blades. For hedge trimmers, this means that the envelope contour, in particular the outer circumference in each axis position must not get into the engagement gap between the two gegeneinder working edges, ie when resting on the upper edges of the lower blade, the Hüllhontur may only as far in the direction of the upper edge of the lower blade in the Enough engagement gap that no contact with this is given. The envelope contour, in particular its outer periphery characterized in cross-section, in particular the height and width dimensions characterizing the outer circumference, are thus selected such that they are equal to or greater than the clear width of the counteracting electrons in all axial positions elements of a tool of the mobile implement, preferably equal to or greater than the distance between two adjacently disposed cutting edges of a knife, in particular the knife with the furthest from the direction of movement descriptive axis of the moving cutting one of the two interacting knife systems, which usually is formed by the lower blade, which is away extending cutting. In detail, this means that the height dimensions for hedge trimmers characterizing the outer circumference of the envelope contour in cross-section are greater than the distance between two adjacently arranged cutting edges of a lower blade which have a greater tooth or cutting height than the upper blades. The decisive factor is that there must be contact with the upper edge of the lower blade in each axis position. The support points determine the width dimension in this axis position. The distance between the theoretical connection axis of the support points and the point of maximum extent in the engagement gap inside must then be smaller than the distance between the upper edges of the individual tools to each other, that is upper edge lower blade and upper edge outer blade. This also applies analogously to beam mowers and scarifiers. This ensures that unintentional severing of the device connection cable is avoided with certainty, since a slipping between two interacting cutting is excluded. The penetration of the cable into the effective range of the mobile device is reliably prevented.

Around to ensure a good winding work on a cable drum the sheath according to the invention in terms of their dimensions and / or Choice of material chosen such that under load, based on a reference value of 100 N, by a deformation in the reversible region is characterized, which by a maximum elongation ΔI in the range from including 0 to 150 mm / m, preferably 10 mm / m to 150 mm / m, more preferably 10 mm / m to 60 mm / m is characterized or preferably and a Cross-sectional deformation in the range of 0 to 30 inclusive mm, preferably 2 mm to 30 mm, particularly preferably 2 mm to 10 mm across the cable longitudinal axis s1 with a load support of 10 cm width with a plate.

According to one second embodiment surrounds the sheath the supply line only over a portion of the axial Extension of the supply line. In this case is in the connection area at least one of the electrical connection means provided by the shroud free area. This is between ≥ 0 and 60 inclusive cm, preferably <50 cm. In this area, the supply line extends quasi out of the shell. The attachment or fixation of the sheath then takes place on the supply line, for example via the Tensioning of an end piece. This solution offers the advantage that the strain relief on the device side can be provided.

The electrical appliance connection cables can do this for a variety of different devices are used as this not specifically adapted to the connection on the individual device and also not in constant Connection with the mobile implement is what the handling and the storage of the mobile implement and the device connection cable even relieved.

A Such design of the device connection cable, In particular, the sheath also provides protection against the unintentional severing of the cable when used for sickle lawn mowers, since a run over the now much thicker cable is much more difficult. That means it will According to the invention a certain Longitudinal and Cross-section strength specified.

Under Elongation ΔI is thereby a change in length in the axial direction, that is change the length in the direction of the cable longitudinal axis Understood. The cross-sectional deformation is dependent the configuration of the cross section in terms of dimensions defined on the inner circumference or on the outer circumference of the casing. These characterizes a dimensional change transverse to the cable longitudinal axis.

Thereby can the tensile forces that occur in practice due to friction Grass or by deflections arise and partial longitudinal deformations let in, be compensated as much as possible. This is especially true when winding on a drum, causing deformation of the casing be avoided. these can as already stated through the appropriate dimensioning, choice of material or the structure of the casing can be realized. All these possibilities can used individually or combined with each other.

The flexibility during the winding process is based on a Hüllkreis- or diameter range of a cable drum of 150 to 300 mm given.

In an advantageous embodiment, in addition, the sheath can be provided with a signal color or present in signal color. The electrical appliance connection cable normally has two end regions, a first end region in which the electrical connection device is provided for coupling to an external energy source, and a second, in which the second electrical connection device is provided for coupling to the working device.

• a) koaxial zur Mittenachse bzw. Symmetrieachse der Vorsorgungsleitung oder
• b) exzentrisch zur Mittenachse bzw. Symmetrieachse der Versorgungsleitung.

The supply line comprises in the simplest case a three-wire electrical line, which is sheathed with the usual insulation. The sheath forms a protective sheath. This is characterized in terms of its geometric shape in cross-section viewed through a theoretical axis, which corresponds in the simplest case of a central axis or in the most symmetrical embodiment of the symmetry axis. An alternative is that at least three insulated individual lines are arranged in the interior, if the jacket has regulatory compliant properties. In both cases, these extend in the extended state of the device connection cable over its axial extent

• a) coaxial with the center axis or symmetry axis of the supply line or
• b) eccentric to the center axis or axis of symmetry of the supply line.

in the In the first case, the supply line is centered in the stretched state arranged in the casing. Not in the second case.

The Profile must in his sleeve contour be designed so that it has an extension in all axial positions, the bigger than the clear width or the width of an entrance slit for each other is acting tools and the part penetrating into the gap All axial positions allow only one penetration, the smaller the depth of the entrance slit to the tools. Under width, the Minimum outer distance in all axis positions between two on one through the axis, in particular theoretical Rotary axis, lying points on the outer circumference understood. The width describes the distance between two outer points on the outer circumference, which can rest on the tool. The height h determines then the extension of the theoretical connection axis between the two width-determining support points in this Achslage and the distance of the outermost Extension of the outer circumference perpendicular to it in the entrance slit. With h the depth the entrance slit correlating measure at rest or concern meant at the entrance slit, while the width of the sheathing with respect to the maximum width of the entrance slit is to be interpreted. It is crucial that in all axis positions of the device connection cable penetration of the cable is not given in the gap, as in each axis position when the envelope contour is applied to the tool, the depth or height dimension, the depth dimension of the Eindringepaltes must fall below.

Preferably will be executions dependent on the common used devices with the largest entry gaps designed.

• – b ≥ 12 mm und vorzugsweise < 21 mm
• – b ≥ 21 mm und vorzugsweise < 34 mm
• – b ≥ 34 mm, wobei in

allen Fällen die Tiefenmaße ebenfalls darauf abzustimmen sind, das heißt immer kleiner als der Abstand zwischen den Oberkanten der gegeneinander wirkenden Werkzeuge ist.For example, are customary opening gap widths on tools 12 . 21 or 34 mm, dimensions of the sheathing are preferably selected which are at b ≥ 34 mm. For the height dimension h this means dimensions of h ≤ 8 mm, for example. Furthermore, there are also the possibilities of specifying separate device connection cables for different gap widths and depths. For example, three standard sizes could be offered with

• - b ≥ 12 mm and preferably <21 mm
• - b ≥ 21 mm and preferably <34 mm
• - b ≥ 34 mm, where in

In all cases, the depth dimensions are also to be matched, that is, always smaller than the distance between the upper edges of the opposing tools.

there the latitude and highness is always like that selected that this is equal to or greater than the Distance between two adjacent fixed blades or teeth a tool of the mobile working device, here on conventional implements is turned off and meant the tool and thus the cutting are what the greater distance have each other and the greater height. These Cutting also determines the engagement geometry.

The designed according to the invention Cord can in terms of its length arbitrarily executed be. Prefabricated standard lengths are preferably offered. This will be especially for the outdoor area pre-assembled standard extension cable offered. These are for example in the range of 2 to 30 m.

The electrical appliance connection cables points as already stated two end regions, a first end region and a second end region End region, wherein in each end region in each case an electrical connection device is provided.

The first electrical connection device serves for releasable electrical coupling to a power supply device, while the second electrical connection device preferably serves for detachable electrical coupling to the mobile working device. These can be designed arbitrarily, wherein the first electrical connection device is designed in the simplest case as a plug. The plug is connected to the casing, preferably non-rotatably and communicates with the electrical supply line in electrical connection by coupling the respective contacts of plug and supply line to each other. The supply line is attached to the plug. The second electrical connection device for coupling to the mobile working device is designed according to a first particularly advantageous embodiment as a socket. This is coupled to the jacket, in particular rotatably connected and is in electrical connection with the supply line.

• a) formschlüssige
• b) kraftschlüssige
• c) stoffschlüssige

There are a number of possibilities for coupling the plugs or sockets to the sheathing. Are conceivable

• a) positive locking
• b) non-positive
• c) cohesive

links or a combination of these. The compounds may also preferably be soluble or unsolvable be. In the simplest case, the connection is via terminal connections or corresponding coupling devices. This is for example on front and rear end of the sheath each provided a coupling sleeve, the with in the outer circumference the sheath grooves provided thread-like engaging webs is provided. The coupling bushes are with outward projecting ratchet teeth Mistake. The recorded at the connector end of the jacket coupling sleeve engages in a sleeve, the locking recesses associated with the locking teeth is provided and attached to a rear waistband of the plug can be latched with inwardly projecting locking teeth. These Executions apply in analogy for the connection between sheathing and socket to be coupled to the work unit End. Other options are conceivable. Other execution options consist in the realization of non-positive connections, in particular Clamping and pressing connections, for example in the form of clamps, Terminal segments. Interlocking Connections can be considered as Rast- or bayonet connections. Cohesive ones achieved by encapsulation or encapsulation.

to Adaptation to different plugs or sockets, which in particular in terms of country-specific Special features If necessary, an adapter may be provided to replace the Plug or socket allows or with the same configuration of the sheath a corresponding connection between this and the plug or the socket allows. For this purpose, the sheathing or the electrical connection device, in particular their housing, connected to an adapter receiving device, which in turn with coupled to the adapter, which is connectable to the plug.

According to one particularly advantageous embodiment is also intended for coupling with the mobile working device electrical connection device, in particular the socket, in second end portion executed with a device for strain relief. In In this case, it is not necessary to strain relief on the mobile implement Provide itself, but already on the device connection cable, which for a variety different applications can be used. In the simplest case are molded cable clamps provided, whereby the plug-in coupling between the plug and socket is secured. Another solution consists in the provision of a belt, which on the housing of the second electrical connection device is arranged and when connecting this with the device side Plug over the connection is made, preferably the wrapping element two ends over that Cross over the connection led and at a likewise at the electrical connection device, in particular the housing provided receiving device, on or be mounted. This receiving device is in the simplest case of a button-like Formed projection, which with recesses on the wrap interacts. Other options are conceivable.

The versions The facilities for strain relief are diverse. Also conceivable are positive connections the housing the electrical connection devices to be coupled to one another, in particular latching connections.

The designed according to the invention electrical appliance connection cables is through a simple structure as well as the possibility of use and application for one Variety of different mobile equipment without additional modifications suitable. In particular, the coupling to the mobile implement either via the on this already provided cable end or provided on the mobile device and arranged plugs.

• – als separates Bauteil zum elektrischen Versorgungskabel ausgeführt sein oder aber
• – mit der elektrischen Versorgungsleitung eine bauliche Einheit bilden.

With regard to the execution of the sheath there are a variety of ways. This can be done according to the functions assigned to it

• Be executed as a separate component to the electrical supply cable or
• - Form a structural unit with the electrical supply line.

The primary function of the sheathing is the protection against unintentional destruction or severance of the device connection cable, good windability and trouble-free operation. Other functions can be seen in the supporting and guiding position for the supply line and thus protection against cable breakage or excessive buckling and twisting. The division of functions at Multi-part design allows optimal design of the individual elements to the specific application requirements.

in the encloses the former case the sheath either the electrical supply line below Forming a gap or the supply line is flush at least on a partial surface the inner circumference of the casing. In the second case will be from the front in the electrical supply line with a much stronger insulation accomplished or it becomes cohesive Composite made between the insulation and the sheath. The first version offers the advantage of a possible Replacement of the supply line and a low weight. The second version offers the advantage of better kink protection.

• – in axialer Richtung
• – in radialer Richtung
• – in Umfangsrichtung
• – in Höhen- oder Breitenrichtung

oder in einer Kombination aus oben genannten Möglichkeiten erfolgen. Insbesondere zur Erzielung einer hohen Flexibilität hinsichtlich der Führung des Geräteanschlusskabels mit Richtungsänderung werden dabei in axialer Richtung unterteilte Ummantelungen gewählt. Diese bestehen im einfachsten Fall aus einer Vielzahl von Einzelgliedern, die in axialer Richtung gegeneinander verschiebbar und/oder verdrehbar angeordnet sind. Bezüglich der konkreten Ausführung bestehen hier wiederum eine Vielzahl von Möglichkeiten. Im einfachsten Fall sind eine Mehrzahl alternierend angeordneter Glieder eines ersten und zweiten Typs vorgesehen, die formschlüssig ineinander greifen und in axialer Richtung gegeneinander verschiebbar sind. Im einfachsten Fall sind dabei die einander benachbart angeordneten Glieder durch unterschiedliche Höhen- und Breitenabmessungen charakterisiert, wobei jeweils ein Glied Vorsprünge und das andere Ausnehmungen umfasst, die ineinander greifen oder aber beide zueinander entgegengesetzt ausgerichtete Vorsprünge umfassen, die einander umgreifen.Regarding the materials used there are a variety of possibilities. Preferably, optimized materials are used in terms of their properties for outdoor use. These should be UV-resistant and have a very high strength, so that damage is largely avoided. The materials used are plastics and metals. The use of plastics offers the advantage of only a small additional weight. In this case, the casing can be made in one piece or in several parts. In one-piece design, the sheath consists of a compact sheath which extends over the axial extent of the supply line. However, this is elastic at least in the axial direction. Elasticities in height and width directions may be lower. In the other case, the sheath comprises a plurality of individual parts, which are brought into operative connection with each other. In doing so, the subdivision

• - in the axial direction
• - in the radial direction
• - in the circumferential direction
• - in height or width direction

or in a combination of the above possibilities. In particular, in order to achieve a high degree of flexibility with regard to the guidance of the device connection cable with a change in direction, sheathings subdivided in the axial direction are selected. These consist in the simplest case of a plurality of individual members, which are arranged in the axial direction against each other displaceable and / or rotatable. With regard to the concrete execution, there are again a multiplicity of possibilities here. In the simplest case, a plurality of alternately arranged members of a first and second type are provided, which engage in one another in a form-fitting manner and are displaceable relative to one another in the axial direction. In the simplest case, the members arranged adjacent to one another are characterized by different height and width dimensions, one member each comprising projections and the other recesses which engage in one another or else comprise mutually oppositely oriented projections which engage around each other.

Further can be used cardan joints or individual ball joint elements, the above corresponding spacer elements with respect to their position to each other be fixed. In the end of the supply line is also provided at least one stop. This is in the simplest case of formed an element which cooperates with the sheath force-fit or form-fitting, this means in the axial direction opposite this is fixed.

Regarding the selected Cross-sectional profiles have a multitude of possibilities. It is between an execution with the same cross-sectional geometry of the envelope contour on the outer circumference and Inner circumference of the casing or different geometries the envelope contour on the outer and inner circumference distinguished. In the first case, this means a simple production the individual sheathing or the individual parts of the sheath. In the second case, the sheathing is due to different external geometries and internal geometries characterized, here also an adaptation the internal geometry is turned off to the supply line. This is especially desired flush Concern and leadership of the supply cable required.

Regarding the Geometries themselves are a multitude of possibilities. Preferably, a Diameter or polygon selected, the transitions then rounded are. In the latter case, in the simplest case, a triangular shape, preferably in the form of an equilateral triangle. This allows a simple and space-saving winding. This applies analogously as well for six and octagonal shapes.

• a) Ausführung der Ummantelung als schlauchartiges Element mit im Axialschnitt betrachtet nebeneinander angeordneten Bereichen unterschiedlicher Abmessungen in radialer Richtung und Vorsehen einer Beschichtung zumindest in den mit den Erhebungen versehenen Bereichen.
• b) Ausführung als schlauchförmiges Element, vorzugsweise frei von Querschnittsveränderungen in axialer Richtung mit am Außenumfang angeordneter Stützkonstruktion.
• c) Ausführung mit Stützkonstruktion mit am Außenumfang der Stützkonstruktion aufgezogenem Mantel.
• d) Ausführungen von schlauchartigen Elementen mit Einlagerungen zur Eigenschaftsbeeinflussung.
• e) eine Kombination aus d) mit einer der anderen Möglichkeiten.

A multi-part construction in the radial direction can be realized for example by the following possibilities:

• a) embodiment of the casing as a hose-like element with considered in axial section juxtaposed areas of different dimensions in the radial direction and providing a coating at least in the areas provided with the surveys.
• b) design as a tubular element, preferably free of cross-sectional changes in the axial direction with arranged on the outer circumference support structure.
• c) Design with support structure with mounted on the outer circumference of the support structure coat.
• d) Designs of tubular elements with inclusions for influencing the properties.
• e) a combination of d) with one of the other possibilities.

• – Fasern
• – Geweben
• – netzartigen Strukturen

erfolgen.Embodiments with only elastic inner tubular element and coating are designed such that they are preferably provided on the outer circumference with such a coating. The coating is harder, that is, has a lower modulus of elasticity. For example, a hard PVC material is used for the coating. Thermoplastic materials can be used for the elastic element, for example PP, PE, EVA, flexible PVC, PUR and mixtures especially with EVA. The construction material used with it belongs to the group of thermoplastic elastomers. In the case of a multi-component solution with a harder coating, these coatings are selected, for example, from hard PVC, hard PE or PP, in order to achieve the required cross-sectional strength in conjunction with the thermoplastic elastomers by means of wound thread-like constructions. The influence on the properties, in particular change in the longitudinal strength and / or transverse strength can be achieved by incorporation of corresponding elements, for example of

• - fibers
• - tissues
• - net-like structures

respectively.

These can also over Cross be incorporated to reduce the twist. To increase the longitudinal strength can For example, one or more individual threads are incorporated in the longitudinal direction. Furthermore, the longitudinal strength over the Magnification of the Strength the wall increases or it will be provided in this appropriate deposits for reinforcement. As already stated the tubular one Element made of a thermoplastic material on the outer circumference be provided with a coating. In this case, the tubular element either with a constant cross-section over its axial extent or changeable Cross section over its axial extent, that is with different dimensions characterized in the radial direction. In the second case will be included the coatings only on the areas forming the survey areas on the outer circumference applied. The areas free of the surveys are on their outer periphery free from such a coating. It can in addition to increase the ring stiffness the width of the wall of the tubular element in the survey area the subsequent Be performed areas enlarged.

Of the second approach is characterized in that the tubular element with constant Cross-sectional profile executed is and on the outer circumference a support structure, for example, thread-like, that is a continuously coiled Spiral from a harder one Material, such as rigid PVC, is arranged. It is also possible execution the support structure from single annular Elements connected by corresponding links are coupled.

A further execution option This is the support structure on the inner circumference of the tubular Provide element. In this case, the support structure is made in lightweight construction. in the the simplest case, this is designed as an injection molded part, wherein here so-called spacers in the radial and axial directions are provided. Preferably, this is designed as a single element. Conceivable to increase the elasticity execution the support structure is it, these from individual support elements, which are arranged adjacent to each other in the axial direction, through which the electrical supply line is passed. The individual elements are in the axial direction relative to each other slidably arranged and can even in the radial direction compensate for minor offsets. In the simplest Case, a single support element is a ring-shaped element, which with an over a connecting element arranged adjacent annular element connected is. There are two support areas on the inner circumference of tubular Element of the sheath produced. In the other case, the individual elements in the form of, for example, plate-spring-like design on elements trained, that is These are as annular Elements with inclination in one direction, these being arranged in such a way that that the inclinations here side by side arranged disc springs viewed in the radial direction each extending away from each other. As already stated, These elements are preferably formed by injection molded parts. Decisive in all versions is that support structure and the tubular one Element of the sheath are not designed so that they are in their mobility are mutually hampered, but by one elasticity are characterized, the reversible deformations in a given Elongation range and / or allow cross-sectional deformation area.

The device connection cable can be wound onto a cable drum. The cable drum unit generally comprises a frame and a rotatably mounted cable drum. This has two electrical connection devices which are electrically coupled together. Preferably, the Coupling in the cable drum. The first connection device is used for coupling to a power supply source, the second of the coupling to the electrical device connection cable. For this purpose, the first connection device is preferably designed as a plug, the second as a socket. In this case, according to a particularly advantageous further development, the first electrical connection device is part of a cable drum. This means that the electrical appliance connection cable is permanently connected to and unwound from the cable drum. As a result, a sufficient length between the working device and the cable drum is achieved, so that the cable drum is not arranged in the vicinity of the operating area and is perceived as disturbing during the operation of the mobile implement or must be carried. The cable drum itself can be provided with a winding device. For this purpose, a biasing means and a locking device is provided. The biasing device is designed, for example, in the form of a spring unit, which pretensions the unwinding of the device connection cable, while the locking device fixes the cable drum in the unwound position of the device connection cable in position, that is a turning back and thus prevents winding.

According to one Further development, the cable drum unit as a stationary unit attached to a stationary element, that is preferably be mounted. According to one alternative version The cable drum is also mobile, that is, is on a drive stored. In a particularly advantageous development is to prevent the twisting of the connecting cable between the power supply and the plug of the cable drum this rotatably on the frame connected, for example by a cable clip. The plug of the Cable drum is in this case in the rotational center axis of the cable drum arranged as the first component of an electric slip ring coupling. The second part of the slip ring coupling, which with the First electrically cooperates with the first end of the device connection cable connected.

According to one particularly advantageous embodiment the cable drum this is preferably mounted on both sides, wherein the connection of the electrical connection device preferably takes place in the area of the bearing axis. This means that the intended Connection device of the cable drum at this for the electrical Cable on the outer circumference the drum is arranged and the connection device to a Power supply unit is arranged in the bearing axis. Between this and the connection in the cable drum is a slip ring coupling intended. The outer contour of the Drum is preferably designed such that this to the envelope contour the sheath of the electrical safety cable is adjusted. In the simplest case at execution the envelope contour with a circular cross section are correspondingly adapted curved recesses, which preferably by a thread-like around the outer circumference the drum extending groove are provided. These becomes easier guidance created at the beginning of the winding against the hose. Preferably is the connection device on the outer circumference of the drum respectively in an outer end area arranged in the axial direction of the drum. To secure are in accordance with a particularly advantageous embodiment additional Ribs on the outer circumference provided in the hose profile to secure the sheath plunge.

The inventive solution explained below with reference to the figures. This is in detail the following is shown:

1a to 1e illustrate in simplified schematic representation based on two views of the basic geometric structure of an inventively designed electrical device connection cable;

2 illustrates in a simplified schematic representation of the protective function using a mobile implement in the form of a hedge trimmer;

3a to 3f clarify possible embodiments of the cross-sectional design of the sheath;

4a to 4f illustrate possible embodiments of the casing according to the invention;

5a and 5b clarify in a schematically simplified representation possibilities of fixing the position in multi-part sheathing;

6 illustrates a first embodiment of electrical connection devices;

7 illustrates in schematically simplified representation of the possibility of coupling between the connection device and sheathing with adapter;

8th illustrates an embodiment according to 7 with strain relief;

9a and 9c illustrate in a schematically simplified representation of two versions with cable drum unit;

10a and 10b illustrate in schematically simplified representation in two views a cable reel unit for stationary operation;

11a illustrates an embodiment of a mobile cable reel unit;

11b clarifies the basic principle of a winding device;

12 illustrates a particularly advantageous embodiment with functional summary of a cable drum;

13 illustrates an alternative embodiment of a device connection cable with the jacket-free areas.

The 1a illustrates in a simplified schematic representation of the basic structure of an inventively designed electrical device connection cable 1 , especially safety cables. This includes an electrical supply line 2 that by a sheath 3 is enclosed. The jacket 3 encloses the electrical supply line 2 in the axial direction over at least a portion of the axial extent, preferably the entire axial extent and in the circumferential direction. The device connection cable 1 is designed as a separate component. The jacket 3 is by a hull contour 4 characterized in the form of a diameter or a polygon. This means that the sheath 3 viewed in cross-section through an outer peripheral surface 5 which describes a polygon shape when viewed in cross-section. Furthermore, the sheath is 3 through an inner circumference 6 characterizes the interior 13 for receiving the supply line 2 forms. The envelope contour 4 , especially the outer circumference 5 the sheath 3 descriptive contour is chosen such that the width dimensions b in all axial positions, that is, when the cable is equal to or greater than the maximum clear input width of the present in the feed direction of a working device, for example in the form of a hedge trimmer gap between two adjacent arranged cutting and the Height h in all axis positions, which is the distance between the outermost point on the outer circumference 5 and the support at the inlet gap corresponds to smaller than the gap depth, that is corresponds to the distance between the upper and lower blade. Depending on the design of the envelope contour, the term "width dimension" is understood to be the minimum distance between two outermost points arranged on the outer circumference, which still permits contact with the entry gap, both in the case of symmetrical and asymmetrical design. The electrical device connection cable 1 , in particular the safety cable, comprises at one end 7 a first electrical connection device 8th and at the other end area 9 a second electrical connection device 10 , The first electrical connection device 8th serves the coupling with a power supply device, here by way of example 11 in the form of a socket, and the second electrical connection device 10 is used for coupling with the mobile implement 12 , The electrical connection devices 8th . 10 are according to the invention with the sheath 3 connected. The connection is preferably made in the axial direction free of a displaceability and rotationally fixed in the circumferential direction. The jacket 3 encloses the electrical supply line 2 , preferably forming an intermediate space 14 , In this case, both are - supply line 2 and sheath 3 - Designed as separate components. This is schematically illustrated in FIG 1b played. This is illustrated by a cross-section through the electrical device connection cable 1 the basic structure of it. The 1b illustrates an example of an embodiment of the envelope contour 4 , in particular the outer circumference 5 , in the form of a polygon, in particular hexagon. The inner circumference 6 can be performed arbitrarily, for example circular. The supply cable 2 gets in from the inside circumference 6 enclosed interior 13 guided. The diameter d _{2 of} the electrical supply line 2 is smaller than the inner diameter d _{6 of} the sheath 3 where d ₆ is the inner circumference 6 descriptive contour is described. Between the supply line 2 and the inner circumference 6 there is a gap between them 14 ,

The 1c contrast illustrates an execution of supply line 2 and sheath 3 in integral construction. Again, this is exemplified by a sectional view according to 1a played. The envelope contour 5 is also exemplified here as a hexagon. The electrical supply line 2 lies free from a gap on the inner circumference 6 the sheath 3 at. 1d In contrast, illustrates an embodiment according to 1b with envelope contour 4 with diameter d5. The 1e illustrates an alternative embodiment with a supply line consisting of three insulated individual lines 2 ' . 2 '' . 2 '' 'is formed.

The jacket 3 is elastic, that is flexible, executed, this being in any case in the longitudinal direction, that is given over the extension I. Furthermore, elasticity can also be given in height direction h and width direction b. According to the invention under load of 100 N longitudinal strains in the range of .DELTA.I between 0 and 160 mm / m, preferably 0 and 60 mm / m or 60 and 160 mm / m, more preferably 10 mm / m to 60 mm / m and / or cross-sectional deformations in the range of 0 to 30 mm, preferably 2 to 30 mm, particularly preferably 2 to 10 mm admitted. This is done by the 3 and 4 described embodiment of the jacket 3 achieved.

In the case shown in accordance with 1a is the first electrical connection device 8th in the form of a plug 36 and the second 10 in the form of a power outlet 37 executed. The coupling with the implement 12 via a with the electric motor of the implement 12 connected cable end 51 , at the end of a plug 52 is arranged.

The 2 illustrates in a simplified schematic representation of the size ratios for the envelope contour 4 , the casing 3 on the basis of a working device 12 in the form of a hedge trimmer 15 , By way of example, the cutting tool is shown schematically in a simplified representation 16 and the case 17 shown. The cutting tool 16 includes an upper knife 18 and a bottom knife 19 , wherein these are in the axial direction against each other, as indicated by the double arrows, movable and thereby allow the cutting process. The envelope contour 4 , in particular the outer circumference 5 the sheath 3 of electrical appliance connection cable 1 is chosen such that its width b, in symmetrical design always viewed through the center M, at least the clear width a between two spaced arranged lower blades 19.1 and 19.2 corresponds, wherein the extension in the height direction h, starting from the width b at the support points or lines on the outer circumference descriptive axis in cross-section is less than the distance b1 between the upper edge 20 the lower blade and the upper edge 21 the upper knife 18 , This means that the width dimension b for the largest possible extension of the device connection cable 1 Viewed in cross section in all axial positions equal to or greater than the maximum possible engagement distance a of the interacting elements of the mobile implement and the height h of the protruding into the engagement portion is less than b1. For example, with hedge trimmers, the distance between the lower knives and with bar lawn mowers.

The 3a to 3e clarify in a schematic simplified representation more of the already exemplary in 1 illustrated diameter differently designed possible envelope contours. 3a illustrates in a simplified schematic representation of the execution of the envelope contour 4 a sheath 3 with an outer circumference 5 , which is described in cross-section by an equilateral triangle. The jacket 3 has, viewed over its circumference, a different wall thickness w. The interior 13 Here is an example of a through hole 22 formed the inner circumference 6 describes. The interior 13 is here, viewed in cross-section, described by a circular contour and is arranged symmetrically with respect to the center M of an equilateral triangle. In contrast clarifies 3b an example with a triangular cross section for the casing 3 , where the interior 13 by a likewise triangular contour of the inner circumference 6 is formed. The jacket 3 Here, essentially over its entire extension in the circumferential direction has a uniform wall thickness. In this case, the supply cable is going through the interior 13 passed through and is preferably to form a gap 14 in this.

3c illustrates in schematic simplified representation of the design of the sheath 3 in cross-section, for an electrical connection cable 1 with a square cross-section of the outer circumference 5 , Preferably, in this case according to 3c the interior characterized by a circular cross-section. In contrast clarifies 3d exemplified an embodiment with square cross-section and analogous design of the inner contour, in particular of the inner circumference 6 for the sheathing 3 , The corners are preferably rounded. The 3e Illustrates by way of example a further advantageous embodiment of the outer contour of a shell designed according to the invention 3 for an electrical appliance connection cable 1 in hexagonal shape with circular passage opening 22 which the inner contour 6 describes.

The 3a to 3e illustrate in addition to the diameter contour only exemplarily possible embodiments of the outer circumference 5 the envelope contour 4 the sheath 3 which are also particularly advantageous for winding on a cable drum.

Regarding the execution of the sheathing 3 There are many possibilities with regard to the selected geometry and the material. These can be designed as wave hoses made of plastic and metal. Also conceivable are chain link-type constructions made of different materials or foamed enveloping profiles.

The 4 illustrates an example in a simplified schematic representation of an axial section through the casing 3 Embodiments of this invention. 4a and 4b illustrate designs in one-piece design. The 4a illustrates in schematic simplified representation of the geometric design for the formation of the sheath 3 in the form of an extruded plastic tube. This is the outer circumference 5 characterized by areas of different dimensions. The inner contour, in particular the inner circumference 6 , is preferred here However, not necessarily described by a circular cross-section, which is characterized by a diameter d ₆ . The outer contour, in particular the outer circumference 5 , Here is by alternately arranged in the axial direction sections 23.1 and 23.2 Characterized by different dimensions in the height direction h _23.1 and h _{23.2 are} characterized and thus form areas of different outer dimensions. In this case, the outer circumference may be characterized by diameter, in this case h _23.1 , h _23.2 diameters or else a polygonal shape. In the second case, for example, h _23.1 , h _23.2 corresponds to the distance in the height direction.

According to 4b is the sheath 3 executed in the form of an extruded plastic tube or an injection molded part, in which case also areas 23 . 1 and 23.2 different height dimensions are provided, which are arranged alternately and have rounded running transition areas or running an extruded / wound or blown plastic hose. Once the plastic hose has been blown, it is made of soft PVC, PUR, soft PP, EVA, PE or a mixture of these materials as a one-component hose. A material reinforcement at 4.5, ie in the range of the outer diameter to increase the transverse strength and to reinforce against wear can be provided. If the hose is extruded and wound, the hose can also be made of the above-mentioned materials as the first component. In addition, however, a second component can be co-extruded. This is also used to reinforce the outer diameter section and can be made of a harder material than the first component. It can consist of PVC, PP, PE and differ in color. By using the second component of a thermoplastic with a higher modulus of elasticity than the first one, a further improvement in the abrasion resistance and the cross-sectional strength can be achieved in addition to the positive effect of the two-color. In this embodiment, the wave-shaped cross-sectional change is applied in a thread-like manner. The area 23.1 is also characterized by a change in the course of the outer contour, that is a change in the axial and in the height direction. Viewed in cross-section, the plastic tube or the metal tube has a wave-shaped course.

The required strength in the longitudinal and / or transverse direction is in the 4a . 4b achieved by the geometry, that is, the choice of dimensions between the individual surveys and / or their height and / or the choice of material. It is also to increase the ring strength, a greater thickness of the wall of the shroud in the survey area 23.1 . 23.2 conceivable in relation to the areas free of the surveys.

The 4c illustrates a version in one-piece construction for the sheathing 3 in which a profile band is wound and the windings are connected in continuous coiling. The required longitudinal and transverse strength, which allows by allowing reversible deformations under load in a certain range of strain, can be structurally influenced by varying the heights and the thicknesses of the wall areas in the survey areas, which arise due to the spiraling due to the profiling. The connecting region between two turns of the helix, whose extent in the radial direction is designated here by X, also serves with regard to its dimensions to increase the transverse strength and at the same time characterizes a certain degree of wear.

The 4d us further illustrate embodiments of inventive sheaths 3 in multi-component construction. S charakters the wall thickness of the sheathing 3 , h _i the Innenhöhenmaß the survey against the smallest external dimension in the radial or vertical direction with respect to the axis of the cable. The 4d illustrates an embodiment according to 4a respectively. 4b and 4e an embodiment according to 4c with additional in the survey area, here by way of example 23.1 . 23.2 provided additional coating 79 , The jacket 3 consists of a tubular element, which can be designed as extradierter plastic hose or injection molded part. This is for the coating 79 and the tubular member made a different choice of material. Preferably, the tubular member is made of an elastomer, while the coating is made of a hard PVC. This is in the survey areas 23.1 to 23.n arranged on the axially extending portions. The use of rigid PVC offers in addition to an increase in the transverse strength the advantage of multicolor cladding.

4f on the other hand clarifies a version with a sheath on the basis of a cross section 3 comprising a support structure 24 in the form of a lightweight construction 25 from an injection molded part, which is the electrical supply line 2 encloses, with these with a reference 26 is covered. In the case shown, the reference 26 in the form of a plastic coating or hose 27 executed. The support structure 24 encloses the supply line 2 and also supports the plastic coating 27 from. This solution has the advantage that only the support structure for the protective function 24 with appropriate strength must be put, since this always encloses the cable. For the cover materials of other, especially lower strength can be used. support structure 24 and reference 26 can thus be optimally designed in terms of their functions in terms of geometry, strength, material.

The support structure 24 exists according to 4f from several mutually positively or positively connected members 28.1 to 28.n , which, for example, annular or, as shown, are designed star-shaped and via connecting webs 30.1 . 30.n connected to each other, the individual, adjacent limbs 28.n such as 28.n + 1 respectively. 28.n-1 in the height or width direction to fix each other.

According to 4g there is the support structure 24 adjacent to each other, but arranged in the opposite direction arranged plate spring-like elements 31.1 to 31.n ,

The connection of the limbs 28.1 to 28.n over connecting bridges 30.1 . 30.n is preferably such that the connecting webs are arranged at least in the mold parting plane.

These execution is feasible in a simple manner for different fixed lengths, where adjustments are made individually to specific cable lengths can be by the corresponding members are cut out and the hose length is shortened.

The 4h illustrates another embodiment of a sheath 3 with individual links 42.1 to 42.n , These are in the form of calottes 43.1 to 43.n executed, which are characterized by a through hole, with 44.1 to 44.n , here 44.1 and 44.2 , is designated and through which the supply line 2 is guided. Between the individual, adjacent dome 43.1 and 43.2 is each a spacer 45.1 to 45.n provided the location of each dome 43.1 . 43.2 in the axial direction, that is, over the extension in the axial direction, fixed.

The 4i clarify an embodiment of the casing 3 in multi-component construction, in which a tubular element is provided, which here with 32 is designated and on the outer circumference 33 a support structure 34 takes effect. This can be carried out in various ways. In the simplest case, this is formed by a spring element or a continuously turned spiral. This is preferably made of a harder material than the tubular element 32 , It is conceivable, for example, the use of rigid PVC. The longitudinal strength is determined by the thickness s of the wall of the tubular element 32 elevated. The strength of the tubular element 32 even can through deposits 35 to be influenced. Are conceivable according to 4i1 for example deposits 35 in the form of high-tensile threads, such as cords. Other possibilities exist in the execution of the deposits 35 according to 4i2 in the form of mesh inserts or, according to 4i3 but crosswise deposits of high tensile fibers.

To realize the bearing fixation in the axial direction are according to 5 medium 46 provided that the individual members with respect to their position in the axial direction over the axial extent of the supply line 2 fix. The fixation takes place in the end regions taking advantage of the geometry of the individual links. The means comprise an end piece 47 which is preferably jammed with the supply line, that is, a positive connection is received and a stop plate 48 forms, at the last spacer 45 comes to the concern. The fixation takes place in the axial and preferably also in the circumferential direction, wherein at least one fixation in the axial direction is required. This is preferably realized by frictional connection, in particular frictional engagement, for example by the spacer 45 an outer surface area 54 which has an inner surface area 55 at the tail 47 interacts. According to a further development is between the stop plate 48 and the tail 47 in the form of a stop sleeve 49 according to 5b a compression spring 50 intended. This additionally fixes the position of the spacer 45 opposite the stop sleeve 49 ,

The 6 illustrates in schematically simplified representation possibilities of the design of the electrical connection devices 8th and 10 in the end areas 7 and 9 , The 6 illustrates a particularly advantageous embodiment with a at the second end 9 arranged outlet 37 with integrated strain relief device 38 , This serves for coupling with the mobile implement 12 ,

For the execution according to 6 To adapt to country-specific plug-in devices, they must be equipped with an adapter. For this purpose is according to 7 the respective end area 7 respectively. 9 the electrical supply line 2 with the connection device electrically and the end region of the casing 3 via one adapter each 39 with the plug 36 or the outlet 37 connected. The adapter 39 is between the plug 36 or the outlet 37 and the sheath 3 arranged. In the simplest case, this includes an adapter snap sleeve 40 that with the plug 36 or socket 37 in particular the housing is rotatably connected and the receptacle for the Adapterschnapphülse 40 , Which herewith 41 is designated, with the sheath 3 connected is. This is part of the plug or socket and supports the sheath 3 towards the center.

The recording device 41 is rotatably with the electrical connection device, here the plug 36 , in particular its housing connected. The adapter can be designed in different ways. This also applies to the assignment of the individual parts. In this case, the elements forming the adapter are each detachable with a connection element - connection device 8th . 10 or sheath 3 - connected.

The 8th illustrates in a schematically simplified representation of a further development according to 7 with another possibility of connection between sheathing 3 and socket 37 , The socket is recognizable from this 37 or the plug 36 on the mobile implement and the socket on the safety cable 1 , This is the sheath 3 stationary with the socket 37 connected. The supply line 2 is electrically coupled to the corresponding contacts. Visible is also the Adapterschnapphülse 40 that works in conjunction with the outlet 37 the connection between sheathing 3 and socket 37 allows. The connection is made here by appropriate design on the outer circumference of a with the electrical connection device 37 coupled federal and the inner circumference of the casing or vice versa of the inner circumference of one with the electrical connection device 37 coupled collar or tab and the outer circumference of the sheath 3 and the fixation by means of an element in the form of the snap sleeve 40 , It can be between ummanmtelung 3 and connection device 37 a positive connection can be created by the adhesion due to the bracing by means of the sleeve 40 is fixed. It is also conceivable to screw on the connection device and sheathing.

The device 38 for strain relief includes a so-called button closure 56 , For this purpose, a wrapping element in the form of an elastic double band 57 crossed over in the socket 37 led to be coupled plug and a projection 59 at the socket 37 hooked. The button closure 56 is designed in such a way that at the double band several so-called keyholes 58 are provided, which can compensate for the different connector contours and sizes.

The 9a and 9b illustrate different versions with cable drum. It can be seen that the inventively designed electrical device connection cable 1 is particularly suitable, even with a cable drum 60 co. The cable reel unit 60 has a drum carrier or a frame 61 on, in which the cable drum 62 is stored. This is usually done on the fly. The drum is rotatably mounted. The frame 61 also includes a handle for handling. On the drum 62 is an electrical connection device 63 by way of example in the form of a plug 64 provided, which serves for coupling with a power supply device via a corresponding extension line. The plug 64 is via an electrical connection with an electrical connection device 65 in the form of a socket 66 for the electrical safety cable 1 coupled. This one comes with its end area 7 in this can 66 inserted, that is, with the arranged on this connector 36 and can on the drum 62 be wound up or handled accordingly in use. The drum 62 has an actuator in the form of a crank. This will ensure that the cable drum is powered and also from the cable drum the electrical safety cable. In a particularly simple embodiment is the plug 63 . 64 the first end of the device connection cable 1 and is secured there zugentlastet.

Also in the 9b shown cable drum unit 60 serves as an interface between the electrical device connection cable 1 and a power supply device 11 , For example in the form of a stationary electrical connection in the form of a socket. But here is the cable drum unit 60 a frame 61 and a rotatably mounted on this, preferably cantilevered cable drum 62 , on the outer circumference of the electrical equipment connection cable 1 is windable. Again, the cable drum includes 62 two electrical connection devices, a first electrical connection device for coupling to the power supply device 11 and a second electrical connection device 65 for coupling to the electrical appliance connection cable. When in the 9b However, the embodiment shown is a slip ring coupling 67 is provided, comprising a first component, which is formed by the electrical connection device for coupling to a local power supply device and a second, with this electrically cooperating component, which cooperates with one end, in particular the connection device. Again, the outer circumference of the cable drum is used to the electrical device connection cable 1 to wind up on this.

The 9c illustrates in schematically simplified representations possibilities of execution of the frame 61 in two views according to 9b , It can be seen that here the installation of the cable reel unit 60 over two foot elements, which are designed accordingly, wherein There are many possibilities with regard to the design.

The 11a and 11b illustrate the execution of the cable reel unit based on two views 60 as a stationary cable drum. This is on a fixed component, such as a building 68 , in particular building wall fastened. The attachment takes place, for example, via appropriate facilities 69 for detachable attachment or storage of the cable reel unit. The cable drum is only in the device 69 which are fixed to the building 68 is arranged. The device 69 can be designed in many forms. This can also be designed to be pivotable and rotatable about different axes. The pivoting is preferably carried out about an executed in the vertical direction axis V, which describes the vertical direction.

In contrast, illustrates the 11a a version with mobile cable drum unit 60 , This is on a frame 70 stored mobile, with the frame 70 over a wheel 71 has, which allows a transport of the cable drum and a displacement.

The 11b illustrates an embodiment of a cable drum with winding device, which is realized by a biasing device and latching. In the simplest case, the cable drum 62 via a biasing device in the form of a spring unit 72 be rotatably mounted, so that during the unwinding quasi a bias of the spring unit is constructed, for the functional case by a locking device 73 is maintained. The spring unit 72 is simplified in 11b1 reproduced, 11b2 illustrates a highly schematized view of the cable drum 62 from the right. The locking device 73 serves to determine the position of the cable drum 62 opposite the frame 61 , This can be designed differently. The concrete design is at the discretion of the competent expert.

12 illustrates an embodiment of a double drum 74 with combined winding for hoses 76 and a device connection cable 1 , The double drum 74 comprises a drum-shaped body, in particular a rotatably mounted drum 78 that have a partition 77 which, viewed in the axial direction of the drum, is firmly fixed or displaceably mounted, can be subdivided into two regions, a first region and a second region. The first area serves to wind up the hose 76 , The drum 78 has a connection device 75 for water, which has an extension hose 79 with a water source 80 can be coupled and in the drum 78 with the hose to be wound up on this 76 is connectable in water-conducting connection. The hose 76 Himself can with his with the drum 78 Coupling end either be firmly integrated in this, that is, there is always a firm connection between hose 76 and drum 78 or via a connection device, not shown here detachable with the drum 78 get connected. With regard to the connection of the device connection channel in the second region of the double drum also exist a plurality of possibilities. Preferably also here the coupling of the device connection cable 1 detachable via an electrical connection device 65 on the drum 78 , which in conductive connection with the electrical connection device 63 stands, which in turn can be coupled via corresponding lines with a power supply device. Depending on the configuration, however, it is important that the water connections and the electrical connections are either provided with a suitable insulation or liquid and current density are decoupled from each other, which can be done via appropriate additional measures or circuit breaker. The function can be taken over by the partition with, here the partition also by the inner of the drum 78 goes, that is either the drum 78 Made up of two separate parts that overlap each other over the dividing wall 77 to drum a structural unit 78 be connected or from an element which has a partition in the interior or the connections and connections via corresponding mutually electrically insulating and liquid-tight receiving devices are realized.

13 illustrates in schematic simplified representation of the basic structure of a device connection cable 1 with at least one of the sheath 3 free end area. Preferably, both end regions are free of the casing 3 , The supply line 2 is to do with the electrical connection devices 8th respectively. 10 electrically coupled. The jacket 3 covers most of the axial extent of the supply line 2 , Between each of the electrical connection devices 8th respectively. 10 and the sheath 3 is one of the sheath 3 free area of the supply line provided. The casing itself is fixed to the supply line in the axial direction. This is preferably done by jamming the sheath 3 opposite the supply line 2 and a tail. The of the jacket 3 Free areas can be chosen differently large. These are preferably each in the range of greater than 0 less than 60 cm, preferably greater than 0 less than 50 cm. As a result, in the end region, in particular in the region of the coupling with the power supply device or for the connection device 10 for coupling with a mobile work tool to the larger envelope omitted contour, which allows the use of strain relief devices on the implement in a particularly advantageous manner.

The 14 illustrates a particularly advantageous embodiment of a cable drum unit 60 in two prospects for winding a safety cable designed according to the invention. The cable drum 62 is mounted on both sides and that in a frame 61 , The two bearings are with 80 and 81 designated. Furthermore, a drive device 82 provided, which is designed for example in the form of a hand crank. This is preferably in the bearing axis with the cable drum 62 connected. The cable drum 62 is rotatably mounted. The cable drum itself comprises an electrical connection device 63 for coupling or for connection to a power supply unit. This connection device is stationary on the frame 61 stored. The coupling to the electrical connection device 65 for connecting the cable to the cable drum 62 via a slip ring coupling 67 , The electrical connection device 65 is in the area of the outer circumference of the cable drum 62 arranged. The outer circumference 83 the cable drum is with a corresponding profiling 84 Mistake. This is to the outer contour of the sheath 3 customized.

1

electrical Cord

2

electrical supply line

3

jacket

4

envelope contour

5

outer periphery

6

inner circumference

7

end

8th

electrical connecting device

9

end

10

electrical connecting device

11

Power supply means

12

implement

13

inner space

14

gap

15

hedge clippers

16

cutting tool

17

casing

18

upper blade

19

lower blade

20

top edge

21

top edge

22

Through opening

23.1

section

24

support structure

25

lightweight construction

26

reference

27

Plastic coating

28.1-28.n

limbs

29

outer periphery

30.1-30.n

connecting webs

31.1-31.n

end

32

tubular element

33

outer periphery

34

support combination

35

insoles

36

plug

37

socket

38

strain relief

39

adapter

40

Adapter sleeve snap

41

admission

42.1-42.n

limbs

43.1-43.n

dome

44.1-44.n

Through opening

45.1-45.n

spacer

46

medium

47

tail

48

stop plate

49

stop sleeve

50

compression spring

51

cable end

52

plug

53

outer periphery

54

Outside area

55

Internal surface area

56

button closure

57

dual band

58

keyholes

59

head Start

60

Cable drum unit

61

frame

62

cable drum

63

electrical connecting device

64

plug

65

electrical connecting device

67

Slip ring coupling

68

building

69

Facility for attachment or storage of

Cable drum unit

70

frame

71

wheel

72

feather

73

locking device

74

double drum

75

Water supply facility

76

tube

77

partition wall

78

drum

79

coating

80

storage

81

storage

82

driving means

83

outer periphery

84

profiling

Claims (59)

On a cable drum ( 62 ) windable electrical appliance connection cable ( 1 ) for mobile work equipment, in particular safety cable for garden tools 1.1 with an electrical supply line ( 2 ), comprising two end regions ( 7 . 8th ), arranged at each end region electrical connection device ( 8th . 10 ), wherein the first electrical connection device ( 8th ) the coupling with a power supply device, while the second electrical connection device ( 10 ) is designed for connection to the mobile working device; 1.2 with one, the electrical supply line ( 2 ) surrounding sheath ( 3 ); 1.3 the dimensions of the envelope contour ( 4 ) of the sheath ( 3 ) are chosen and designed such that the device connection cable ( 1 ) in each axial position is free of a position in the engagement region of two mutually working tools, in particular cutting a mobile implement, preferably a touching of the recessed cutting is prevented; characterized by the following features: 1.4 the dimensioning and / or material choice of the casing is chosen such that it is characterized by subsequent deformations in the reversible region with respect to a load of 100 N: a maximum elongation in the range of ΔI including 0 mm / m to 160 mm / m one or, preferably and - a cross-sectional deformation of 0 to 30 mm transverse to the cable axis s1 with a load bearing of 10 cm width with a plate. On a cable drum ( 62 ) Wind-up electrical equipment termination cable ( 1 ) according to claim 1, characterized in that the sheath ( 3 ) is characterized in the reversible region under load by an elongation in the range of 0 to 60 mm / m, preferably 10 to 60 mm / m and / or a cross-sectional deformation in the range of 0 mm to 10 mm, preferably 2 mm to 10 mm transverse to the cable axis s1 with a load bearing of 10 cm width with a plate. On a cable drum ( 62 ) Wind-up electrical equipment termination cable ( 1 ) according to one of claims 1 to 2, characterized in that the sheath ( 3 ) based on an outer diameter up to 40 mm, preferably 35 mm by a meter weight between 40 to 400 g / m, preferably 40 to 200 g / m, particularly preferably 60 to 200 g / m is characterized. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 4, characterized in that the outer circumference ( 5 ) of the envelope contour ( 4 ) characterizing dimensions are characterized in cross-section by a width which is a complete entry of the device connecting cable ( 1 ) is prevented in the entry gap on the tool, wherein in this position, the entry depth of the device connecting cable into the entrance slit is smaller than the distance of the interacting tools in the depth direction. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 4, characterized in that the width and the height characterizing dimensions are equal to or greater than the distance of the engagement gaps of a tool of the mobile working device. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 4 or 5, characterized in that the width dimension is selected such that a contact with the recessed cutters is excluded and a distance from the theoretical connection of the width dimension determining points on the outer circumference of the device exclusion cable ( 1 ) Seen in the vertical direction perpendicular to it is less than the gap depth. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 6, characterized in that the outer circumference ( 5 ) of the envelope contour ( 4 ) is characterized by a diameter which is ≥34 mm; preferably ≥40 mm. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 6, characterized in that the outer circumference ( 5 ) of the envelope contour ( 4 ) characterizing dimensions of widths and height dimensions are formed and the width characterizing distance between two points on the outer circumference ( 5 ) of the sheath ( 3 ) viewed in cross section in the support position at the entrance slit of the tool in each axial position at least ≥12 mm, preferably ≥21 mm, most preferably ≥34 mm. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 8, characterized in that this is characterized by an extent in the axial direction of I = 2 m to 50 m, preferably 2 m to 30 m. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 9, characterized in that the sheath ( 3 ) with the electrical connection devices ( 8th . 10 ) is connected free of electrical coupling. On a cable drum ( 62 ) windable electrical appliance connection cable ( 1 ) according to claim 10, characterized in that the sheath ( 3 ) with the electrical connection devices ( 8th . 10 ) is rotatably connected. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 10 or 1, characterized in that the sheath ( 3 ) with the electrical connection devices ( 8th . 10 ) is firmly connected in the axial direction. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 12, characterized in that the supply line ( 2 ) in the connection region to at least one of the electrical connection devices ( 8th . 10 ) free of the sheath ( 3 ). On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 13, characterized in that the supply line ( 2 ) in the connection region to at least one of the electrical connection devices ( 8th . 10 ) in a range of 0 cm to and including 60 cm, preferably in a range of ≥1 cm to ≤50 cm free of the sheath ( 3 ). On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 13 or 14, characterized in that the sheath ( 3 ) fixed to the supply line ( 2 ) is coupled. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 15, characterized in that the coupling is designed as a press connection. On a cable drum ( 62 ) Wind-up electrical device exclusion cable ( 1 ) according to one of claims 1 to 16, characterized in that the first and / or second electrical connection device ( 8th . 10 ) rotatable in the circumferential direction and fixed in the axial direction with the sheath ( 3 ) are connected. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 16, characterized in that the first or second electrical connection device ( 8th . 10 ) as a plug ( 36 ) is executed, which is at least indirectly rotatably connected to the sheath and with the electrical supply line ( 2 ) is in electrical connection. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 18, characterized in that the second or first electrical connection device ( 10 . 8th ) as a socket ( 36 ) is executed, which rotatably with the sheath ( 3 ) and in electrical connection with the supply line ( 2 ) stands. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 19, characterized in that the connection between the individual electrical connection device ( 8th . 10 ) And the sheath force or positive fit is executed. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 20, characterized in that the connection is designed as a latching connection. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 21, characterized in that between at least one of the electrical connection devices ( 8th . 10 ) and the sheath ( 3 ) an adapter ( 39 ) is provided. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 22, characterized in that the sheath ( 3 ) or the electrical connection device ( 8th . 10 ) with an adapter receiving device ( 41 ) is non-rotatably connected, which positively or positively with the adapter ( 39 ) is connectable. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 23, characterized in that the electrical connection device ( 8th . 10 ) with a device for strain relief ( 38 ) is executed. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 24, characterized in that the electrical connection device ( 8th . 10 ) comprises a latching element, which on the housing of the electrical connection device ( 8th . 10 ) is arranged and cooperates with a complementarily designed element on the electrical connection element to be coupled thereto. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 25, characterized in that the device ( 38 ) for strain relief a belt element ( 57 ), which has a first end region on the electrical connection device ( 8th . 10 ) and crosswise or with the electrical connection device ( 8th . 10 ) can be coupled to the device connection cable electrical connection device is looped to fix the position. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 26, characterized in that the sheath ( 3 ) the electrical supply line ( 2 ) forming a gap ( 14 ) encloses. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 27, characterized in that the electrical supply line ( 2 ) with its outer circumference ( 53 ) flush with the inner circumference ( 6 ) of the sheath ( 3 ) is present. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 28, characterized in that the electrical supply line ( 2 ) and the sheath ( 3 ) form an integral unit. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 29, characterized in that the sheath ( 3 ) is made in one piece. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 30, characterized in that the sheath consists of a plastic or metal shaft hose. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 31, characterized in that the sheath ( 3 ) consists of foamed material. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 32, characterized in that the sheath ( 3 ) in axial section through alternately arranged regions of elevations and depressions, is characterized, wherein the distance between two adjacently arranged elevation regions is preferably <2 mm. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 33, characterized in that the wall thickness of the sheath ( 3 ) is characterized in the survey area by a greater thickness than in the areas free from the surveys. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 30 or 31, characterized in that it consists of extruded profile strip which is wound in such a way that a continuous spiraling results. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 29, characterized in that the sheath ( 3 ) is constructed in several parts. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 36, characterized in that the sheath ( 3 ) of a plurality of limb-like individual parts ( 43.1 . 43.n ), which are positively or non-positively connected with each other, which are firmly fixed in the axial direction in relation to each other or mutually displaceable. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 36 or 37, characterized in that the sheath ( 3 ) consists of a plurality of juxtaposed in the axial direction arranged chain link-like universal joints. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 36 or 37, characterized in that the sheath ( 3 ) consists of chain link-like arrayed ball joint elements. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to any one of claims 30 to 33, characterized in that the individual axially juxtaposed members ( 43.1 . 43.2 ) Are assigned means for distance fixing in the axial direction. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 40, characterized in that the means comprise an end piece connected to the supply line ( 2 ) is fixedly connected in the axial direction and a stop for the adjacently arranged member ( 43.1 . 43.n ) or a spacer. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 41, characterized in that between the last member and the end piece a biasing unit, in particular spring unit, is provided. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 41 or 42, characterized in that the stop is designed in the axial and / or radial direction. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 36 to 43, characterized in that the sheath ( 3 ) is designed in several parts in the radial direction On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 44, characterized in that the sheath ( 3 ) comprises an annular, preferably with profile change over the length I exhibiting hose member as elastomer whose outer periphery is provided in the areas of larger dimensions with a coating of a harder material, preferably PVC. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 44, characterized in that the sheath ( 3 ) comprises a tubular elastic member to which a support structure is associated, the support structure enclosing the outer periphery of the tubular elastic member. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 46, characterized in that the support structure comprises a helical spiral element, preferably a continuously helical spiral element. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 46, characterized in that the support structure comprises a mesh or cross-tissue element, preferably a continuous mesh or Kreuzgewebe element. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 40, characterized in that the sheath ( 3 ) a support device ( 24 ) with a reference ( 26 ) is coated. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 49, characterized in that the support means ( 24 ) is formed by a metal spring and the cover ( 26 ) of a hose element. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 45 to 48, characterized in that the elastic serpentine element is provided in the longitudinal direction with at least one or more longitudinal deposit inserts which extend continuously over the entire length. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 45 to 48, characterized in that the elastic serpentine element is provided in the longitudinal direction with at least one or more nets which extend continuously over the entire length. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 52, characterized in that the outer circumference ( 5 ) is formed in cross-section of a diameter or polygon. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 53, characterized in that the outer circumference ( 5 ) viewed in cross-section by a triangle with rounded edges is writable, whose legs are cambered. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claim 53, characterized in that the outer circumference ( 5 ) viewed in cross section by a quadrilateral with rounded edges is writable. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 55, characterized in that it consists of UV-resistant material. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 56, characterized in that the first electrical connection device ( 8th ) electrically with the cable drum unit ( 60 ) is connected or detachably connectable. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to one of claims 1 to 456, characterized in that the cable drum has an electric slip ring coupling. On a cable drum ( 62 ) Wind-up electrical device connection cable ( 1 ) according to claims 1 to 58, characterized in that the cable reel unit ( 60 ) has a take-up device.