Lifting device for raising supply lines in a greenhouse

Abstract

Lifting device (5) for a greenhouse (1) for lifting at least one supply line (3), in particular a supply line section (42), wherein the lifting device (5) has a support element (6) on which at least - an electrical energy storage device (7) is arranged, - a hydraulic unit electrically connected to the electrical energy storage device (7) comprising at least one hydraulic pump (8), a hydraulic cylinder (9), and a piston (10) provided in the hydraulic cylinder (9), - a traction device is arranged which comprises at least one deflection element (11) and at least one traction element (12), wherein the traction device is connected to the hydraulic unit by frictional and / or positive locking, wherein the pulling element (12) is connected to a connecting element (13) designed for lifting the supply line (3), in particular the supply line section (42), characterized by the fact that at least one, preferably four, roller elements (40) are arranged on the support element (6), which is designed to rest on the supply line (3), in particular on a supply line section (42), wherein the support element (6) is provided with at least one guide element (43), wherein the support element (6) and / or the guide element (43) is designed for the arrangement of the roller element (40).

Description

[0001] The invention relates to a lifting device for a greenhouse for raising supply lines according to the preamble of claim 1.

[0002] Greenhouses for plants and / or crops, in which, for example, vegetables are cultivated, are known from current technology. Inside these greenhouses, metal supply lines are provided, in particular meter-long, rail-like heating pipes, which are intended for heating the greenhouse. Several times a year, these heating pipes must be lifted to remove debris such as leaves and twigs that have accumulated beneath them. Similarly, if plastic sheeting is used, which is also located under the heating pipes, it must be removed and replaced to clean the soil underneath. Currently, the heating pipes, which weigh several kilograms, are lifted section by section by a team of three to five workers.Repeatedly lifting the heating pipes causes health problems for the workers, particularly back problems. Additionally, the cleaning of the greenhouse, which is carried out by three to five workers, leads to increased personnel costs and consequently higher cleaning costs for the greenhouse.

[0003] From US patent 8,544,824 B2, a lifting device for folding and rolling tables is known, which includes a hook for lifting them.

[0004] US2875852A discloses a lifting device comprising a motor and a hydraulic unit.

[0005] US Patent 3,591,028 A describes a lifting device designed as a pallet truck, comprising a hydraulic unit operated with hydraulic fluid. Furthermore, this lifting device includes a pump driven by an electric motor, which in turn is powered by a storage battery.

[0006] JP H07-31794 U discloses a lifting device designed as a forklift truck, which includes a drive unit. The drive unit comprises a hydraulic drive unit, which is an integrated combination of an electric motor and a hydraulic pump, as well as a battery.

[0007] US 3 962 737 A describes a lifting device intended for wheelchairs, which includes a hook designed as a connecting element.

[0008] Therefore, the object of the invention is to provide a lifting device that is easy and comfortable for a worker to use, thereby reducing the cleaning costs for the greenhouse.

[0009] The problem is solved by claim 1, in particular by the characterizing part of claim 1.

[0010] A lifting device for a greenhouse is provided for raising at least one supply line, in particular a supply line section, wherein the lifting device has a support element on which at least one electrical energy storage device is arranged. The supply lines can comprise one or more supply line sections that can be raised by the lifting device. Furthermore, at least one hydraulic unit, electrically connected to the electrical energy storage device, is arranged on the support element, comprising at least one hydraulic pump, one hydraulic cylinder, and a piston, in particular a piston rod, provided in the hydraulic cylinder. Additionally, at least one traction device is arranged on the support element, comprising at least one deflection element and at least one traction element.The traction device is connected to the hydraulic unit by friction and / or form locking, wherein the traction element is connected to a connecting element designed for lifting the supply line, in particular the supply line section.

[0011] In a preferred embodiment of the lifting device, the preferably manually operated lifting device may be designed as a greenhouse supply line lifting device. This greenhouse supply line lifting device may be designed exclusively for use in a greenhouse in which plants and / or other products are cultivated. The preferably manually operated lifting device may be designed as a greenhouse supply line lifting device, preferably exclusively or substantially for use in a greenhouse in which plants and / or other products are cultivated. The plants may be, for example, vegetables, flowers, or fruit plants. Within the greenhouse, the plants and / or other products may be arranged in rows, mirror-symmetrically to one another with respect to a longitudinal axis of the greenhouse.

[0012] The greenhouse can be equipped with supply lines, for example, designed as heating pipes, which are at least partially arranged inside the greenhouse, preferably on a rail-like covering of foil. The supply lines can preferably be arranged in pairs along the aisles and can extend several hundred meters to kilometers along these aisles, where, for example, the plants and / or vegetation are planted. The length of a single supply line is preferably 80 to 120 meters. However, the total length of the supply lines can also be, for example, up to 25 kilometers or more. Furthermore, these supply lines are composed of one or more strands, with each strand having a length of 100 to 200 meters.The weight at the point of lifting the supply line, especially at the section of the supply line, can be 80kg to 100kg, which could only be lifted by several people (three to five people).

[0013] Furthermore, the supply lines can be arranged on support bases designed as clamps, positioned at a distance from the greenhouse floor surface, for example, 10 to 20 cm. These clamps can have a semicircular recess designed for the positive and / or force-fit retention of the supply lines. One surface of the semicircular recess of the clamp is complementary to the geometric surface of the supply line. When the supply lines, especially sections thereof, are lifted, they can either remain attached to the supply lines or, alternatively, remain on the floor surface, in which case they must be collected subsequently, for example, to replace the foil that may be located beneath the supply lines.

[0014] In principle, the supply lines can be designed for heating and / or irrigating the plants and / or vegetation. For this purpose, a fluid, in particular water, is pumped into the supply line, which preferably has a temperature of 20 degrees Celsius to 100 degrees Celsius for heating purposes.

[0015] The support element can be designed as a chassis and is preferably made of metal, in particular iron. For stability reasons, the support element can have a lattice structure. Preferably, the support element has a steel tube construction with a crane-like design. Furthermore, the support element can be designed to accommodate one, preferably two, plates, in particular a wooden plate. The plates can serve to mount technical components, such as an operating device, parts of the hydraulic unit, electrical energy storage devices, or even as a shelf for tools that may be needed when cleaning the greenhouse. Additionally, the lifting device, in particular the support element, can be provided with preferably one or two handles, which can be used to control the lifting device.

[0016] The electrical energy storage device can, for example, be designed as a battery. It is advantageous if the battery is rechargeable, thus preventing frequent battery replacements. Preferably, two batteries are provided for the lifting device, which are arranged, for example, in the rear section of the lifting device and simultaneously serve as a counterweight to the raised supply line, in particular a section of the supply line. The electrical energy storage device powers the hydraulic unit. It is also conceivable that the lifting device is equipped with an electric motor drive, which can be powered by the electrical energy storage device. The lifting device could be moved automatically using the electric motor drive. For this purpose, an operating lever and a control element would be necessary to accelerate or decelerate the lifting device.

[0017] The hydraulic unit can comprise a compressor, in particular a hydraulic compressor, the hydraulic pump, the hydraulic cylinder and the piston, in particular the piston rod which is guided in the hydraulic cylinder, as well as fluid lines. Furthermore, the hydraulic unit can comprise control and / or regulating valves, in particular solenoid valves for controlling the flow of the fluid, as well as bolts.

[0018] The hydraulic cylinder preferably has a cylindrical structure. Oil, for example, can be used as the hydraulic fluid. The pressure acting on the piston, in particular the piston rod, can be varied by a throttle valve associated with the hydraulic unit. The use of the hydraulic unit enables reliable, safe, fast, and time-saving lifting of supply lines, especially sections of supply lines. Furthermore, the lifting device can include an electrical control unit, in particular an electrical circuit, preferably for controlling the hydraulic unit.

[0019] The pulling device can be designed, for example, as a cable pulley, chain pulley, block and tackle, or the like. Preferably, the deflection elements of the pulling device are designed as cable pulleys or chain pulleys. Depending on the design of the lifting device, one or more deflection elements can be used. Furthermore, the pulling device includes a pulling element, which can be designed, for example, as a cable, in particular a steel cable, or a chain.

[0020] The connecting element can, for example, be designed as a hook, which is connected to the tensioning element by means of a positive-locking and / or force-locking connection. The connecting element can be snapped, glued, inserted, or knotted to the tensioning element. Theoretically, several connecting elements can also be arranged on the tensioning element.

[0021] The lifting device according to the invention offers the advantage that, ideally, only a single person is needed to lift the supply lines, particularly sections of them. The lifting device allows for the quick and gradual lifting of the supply line from point to point. During this process, the supply line can assume the shape of a Gaussian bell curve along the lifted section. Advantageously, the reduced number of personnel required makes cleaning the greenhouse more economical and also more comfortable for the cleaning staff, as the lifting device eliminates the need for heavy physical labor. This ensures the long-term health and safety of the cleaning staff.Furthermore, cleaning the greenhouse can be done faster, because the hydraulic unit in particular ensures that the supply lines can be raised quickly and safely.

[0022] In a preferred embodiment of the lifting device, the connecting element may have at least one first contact section which is at least partially complementary to the geometric shape of an outer surface of the supply line, which is particularly round. This measure ensures that the supply lines are stably and securely supported in the connecting element during lifting and / or lowering. Slippage of the supply line, and in particular of the supply line section, within the connecting element can thus be essentially prevented.

[0023] Cleaning costs for the greenhouse can be further reduced if the connecting element is designed as a hook, which includes the first contact section and preferably a second contact section arranged symmetrically to the first contact section along a longitudinal axis L of the connecting element. If a second contact section is provided, two parallel supply lines, in particular supply line sections, can be raised and / or lowered simultaneously. This speeds up the cleaning of the greenhouse. It is also conceivable that the hook has several, in particular more than two, contact sections.

[0024] Furthermore, the hook can also be designed as a double hook. For this purpose, the first contact section and preferably the second contact section can be at least partially U-shaped and designed for the temporary and preferably point-by-point engagement of a tubular, particularly round, supply line. With the aid of the preferably two contact sections, two spaced-apart, parallel supply lines, particularly supply line sections, can thus be raised and lowered simultaneously in order to remove the foil and / or contaminants beneath the supply lines, particularly supply line sections.

[0025] In a further preferred embodiment of the lifting device, at least one first support element and preferably a second support element can be arranged on the support element. Preferably, each support element can be connected to the support element via at least one support spring element. The support element can serve to stably support the lifting device when the supply line is lifted by means of the connecting element. In this process, the support element is moved from its original position, in which the support spring element is in its relaxed state, to an operating position, in which the support spring element is in its tensioned or compressed state. The at least one support element advantageously prevents the lifting device from tipping sideways or forwards.The support spring element advantageously ensures that, after the connecting element is detached from the supply line, the support element automatically returns from its operating position to its original position. The support element can, for example, be designed as a plate. It is also conceivable that the support element can be cuboidal or spherical. Preferably, the support element is made of metal. The support spring elements can be robust enough to bear the weight of the lifting device and to compress when the supply line is lifted, as the additional weight of the supply line acts on the lifting device.

[0026] In a further preferred embodiment of the lifting device, at least three wheels, preferably four, and particularly preferably six wheels, can be arranged on the support element, whereby when the supply lines are lifted by means of the connecting element, all wheels and support elements can be in contact with a floor surface of the greenhouse. The wheels allow the lifting device to be moved easily, quickly, and safely along the supply lines. Furthermore, the wheels can also each serve as support elements. It is also conceivable that the wheels are equipped with a locking device so that the lifting device remains stationary when the supply line is lifted.If the lifting device is mounted on the supply lines, the wheels can be positioned at a distance from the ground surface during lifting of the supply line, particularly the section of the supply line. Preferably, the distance between two wheels mounted on the support element, which are arranged symmetrically to each other in the direction of travel, is greater than the diameter, in particular the outer diameter, of a supply line, preferably of two supply lines arranged side by side. Depending on the arrangement of the supply lines in the greenhouse, the lifting device can thus be moved alongside the supply line, or the lifting device can be moved above the supply line, or the lifting device can be moved on the supply lines. These measures increase the flexibility of the lifting device. The wheels can also be designed as rollers.

[0027] In a further preferred embodiment of the lifting device, the hydraulic cylinder can be connected to the support element by at least one support connecting element, preferably four. The support connecting elements ensure stable and secure mounting of the hydraulic cylinder. The support connecting elements can be attached separately to the support element or be formed integrally with the support element.

[0028] Furthermore, it can be provided that one end of the tension element is arranged on the support element or the hydraulic cylinder, preferably attached by friction and / or form locking.

[0029] In a further preferred embodiment of the lifting device, the piston can be connected to the traction device, in particular to at least one deflection element. Due to this simple and cost-effective design of the lifting device, the traction element, in particular a rope designed as a traction element, can be moved by means of the hydraulic unit, in particular by means of the piston. This rope is connected to the connecting element, which is preferably designed as a double hook. The hydraulic unit has the advantage that heavy loads can be lifted in a few seconds using the lifting device. It would also be conceivable for the traction device, in particular the connecting element, to be additionally connected to an electric drive in order to be able to approach the connecting element more slowly for better adjustment on the supply line.

[0030] According to a further preferred embodiment of the lifting device, it can be provided that, during the lifting of a supply line section, the lifting device is arranged on a supply line section adjacent to the supply line section to be lifted. This measure ensures quick and convenient lifting by the user.

[0031] In a further preferred embodiment of the lifting device, at least one, preferably four, roller elements are arranged on the support element, which is designed to rest on the supply line, in particular on a section of the supply line. The roller elements are preferably made of nylon. The roller elements ensure that the lifting device can be moved or traversed easily and safely on the supply lines, in particular on the respective supply line sections, by means of at least one, preferably four, operating handles arranged on the support element. It is advantageous to arrange two roller elements on each side of the support element, both on the left and right sides. These rollers can, for example, have the shape of a cylinder.

[0032] According to a further preferred embodiment of the lifting device, the support element can be provided with at least one guide element, wherein the support element and / or the guide element is designed for arranging the roller element. Thus, the guide element and / or support element can serve, on the one hand, to support the at least one wheel, and on the other hand, it ensures stable guidance of the lifting device on the supply line, so that accidental tipping or overturning of the lifting device from the supply lines by the user can be prevented.

[0033] According to a further preferred embodiment of the lifting device, at least two wheels, preferably four wheels, can be arranged on the support element, wherein the wheels are positioned at a distance from the ground surface when lifting the supply line, in particular a section of the supply line. Using preferably four rollers reduces the friction generated between the rollers and the supply lines when the lifting device moves along the respective supply line sections, especially when the wheels are positioned at a distance from the ground surface. For example, if the lifting device is not positioned on the supply lines, the wheels facilitate easy and convenient movement of the lifting device on the ground surface.Furthermore, two intermediate wheels can be arranged on the support element of the lifting device, which serve to ensure stable movement of the lifting device on the ground surface, in particular on a section of roadway.

[0034] The wheels can be designed as front wheels and / or rear wheels of the lifting device. In particular, the wheels can be designed as swivel wheels, which are arranged to rotate and / or pivot 360 degrees around their own axis. The wheels, especially the rear and front wheels of the lifting device, can be arranged at a distance of at least 2 cm to 8 cm from the ground surface, particularly the surface of the roadway section. The rolling elements of the lifting device can be arranged at a distance of at least 15 cm to 25 cm from the ground surface, particularly the surface of the roadway section. The center wheels can then be arranged on the surface of the ground, particularly the roadway section.Consequently, with an even weight distribution, the lifting device can be designed as a seesaw, allowing it to be easily pivoted or rotated around its own axis on the road surface. This enables a user to easily and conveniently move the lifting device from the ground surface, particularly the road surface, onto the supply line, allowing the roller elements to come into contact with the respective supply lines. At the same time, the wheels, especially the front, rear, and center wheels, are preferably positioned at a distance from the ground surface.

[0035] The lifting device can be designed to be very stable if the support element has a front section that is essentially V-shaped or U-shaped, with a first leg and a second leg of the V-shaped or U-shaped front section connected by a base. This design extends the service life of the lifting device, especially when handling very heavy utility lines. The V-shaped structure of the support element allows the lifting device to be positioned very close to the utility line. In this case, the lifting device, and in particular one leg of the V-shaped structure of the front section, should be positioned essentially parallel to at least one utility line.This measure makes it possible to keep the distance between the lifting device and the supply line as small as possible, in order to connect the connecting element to the supply line comfortably, easily and safely.

[0036] In a preferred embodiment of the lifting device, the support element may have a connecting section, preferably connecting the first leg and the second leg. A pivotable or rotatable first mast is arranged on this connecting section, and this mast is at least partially designed to support the traction device, particularly the deflection element. The first mast may be connected via a connecting section to the at least one support element, which moves in the same direction when the first mast is rotated or pivoted. The traction device, which preferably has a crane-like structure, may encompass this mast. The connecting section should be formed from a stable, cuboid-shaped web to provide sufficient surface area for the mast.Furthermore, the connecting section should be made of a metal, for example iron, and have a minimum thickness of 0.5 cm to 2.5 cm. The connecting section can be an integral part of the support element. Alternatively, the connecting section can be subsequently attached to the support element, for example by means of a bolted or welded connection. It should be ensured that the connecting section remains immobile relative to other sections of the support element when the supply line, in particular the supply line section, is lifted by the lifting device.

[0037] The design of the lifting device can be further simplified if the first mast has a first mast section and a second mast section, the first and second mast sections being arranged at substantially right angles to each other. This arrangement allows the mast to be configured in the form of a gallows. This increases the reach of the connecting element and ensures that the connecting element can be positioned over the supply lines in simple and less time-consuming steps. Positioning the connecting element on the supply line is thus considerably simplified for the worker, especially if the mast is pivotable or movable, preferably rotating around its own longitudinal axis.

[0038] In order to ensure that the movement of the connecting element, in particular the pulling element, can be ensured at all times, it may be provided that a second mast designed as a guide element is arranged at a distance from the first mast, in particular on the first and / or second mast section of the first mast, which is also designed for the arrangement of the pulling force device, in particular the deflection element, and for the arrangement and guidance of the piston.

[0039] This advantageous measure makes it possible to keep the installation space for the individual components of the lifting device as small as possible. As a result, a compact lifting device can be provided that is easy and safe to operate by a single worker.

[0040] The lifting device can be designed to be very compact and cost-effective if the support element in the front section includes a bearing element for supporting a wheel, particularly a front wheel of the lifting device. Advantageously, the installation space of the lifting device between the legs of the V-shaped or U-shaped front section can be used to position the front wheel. This also advantageously prevents the legs of the V-shaped or U-shaped front section from contacting a supply line first if the lifting device collides with it, thus avoiding damage to the front wheel, and especially to the tire. This further increases the service life of the lifting device, and in particular the front wheel. The service life of the U-shaped or U-shaped front section is also extended.The V-shaped front section can be extended by providing it with at least one damping element, which is made, for example, of an elastic material, preferably rubber. High forces act on the support element when the supply line is lifted by the lifting device. It is therefore preferred that the bearing element is connected to the front section, in particular via a first support element to the first leg, and via a second support element to the second leg, and preferably via a third support element to the base of the front section, and is connected to the first mast, in particular to the first mast section and / or second mast section, via a fourth support element. This measure advantageously ensures that the front wheel remains undamaged when the supply line, in particular the supply line section, is lifted.This measure also ensures that the service life of the front wheel is extended. Preferably, the front wheel has a smaller diameter than the rear wheels. To mount the wheel, especially the front wheel, securely and easily, a wheel suspension may be provided, wherein a spring element is arranged in the bearing element and connected to the wheel suspension and / or the front wheel, and a relative movement is provided between the bearing element and the front wheel and / or the wheel suspension when the supply line is lifted. In the unloaded state of the lifting device, when the connecting element is not yet in the process of lifting the supply lines, the spring element may be in a relaxed state.When the supply line is lifted by the lifting device, the support element can lower towards the greenhouse floor, compressing the spring element. Once the forces exerted on the connecting element by the weight of the supply line are no longer present, the spring element can return to its relaxed state, and the support element can return to its original position.

[0041] In addition, the lifting device according to the invention offers the advantage that, due to the pivotable first mast, the adjacent supply lines, which can be arranged to the left and / or right of the supply lines on which the lifting device is currently located, can also be lifted by the lifting device. Furthermore, the first mast and the associated support element should preferably be arranged parallel to the supply line on which the lifting device is currently located during its movement. To advantageously ensure this, the first mast and the connected connecting section can be pivoted or rotated in this direction so that the first mast and the connecting section are aligned with the direction of travel of the lifting device.Once the point is reached – approximately every 8 to 15 meters, preferably 10 meters – where the adjacent supply line is to be lifted, the first mast can be automatically or manually rotated or pivoted in the direction of the adjacent supply line. The support element can pivot along with it, as it can be connected to the first mast via the connecting section. The support element can then rest on the ground surface of the greenhouse, providing advantageous stability for the lifting device and preventing it from tipping over.

[0042] The hydraulic unit, in particular the hydraulic cylinder, could alternatively be replaced by a pneumatic cylinder unit, in particular by a pneumatic cylinder. It is also conceivable that the hydraulic unit could be replaced by a spindle drive unit. The spindle drive unit can comprise at least a spindle unit, a thread, and a follower. The follower can move relatively along the longitudinal axis of the spindle drive unit or the spindle unit, particularly during rotation of the spindle unit. In this process, the piston, in particular the piston rod, can be set in translational motion.

[0043] The invention and its technical context are explained in more detail below with reference to the figures. It should be noted that the figures show particularly preferred embodiments of the invention, but the invention is not limited to these.

[0044] The figures show: Fig. 1 a greenhouse with plants and supply lines, Fig. 2 the greenhouse without plants with supply lines and a lifting device according to a first embodiment, Fig. 3a the lifting device according to the first embodiment in a side view, Fig. 3b the lifting device according to the first embodiment in a front view, Fig. 3c the lifting device according to the first embodiment in a rear view, Fig. 3d the lifting device according to the first embodiment in a top view, Fig. 4a a lifting device according to a second embodiment in a perspective view, Fig. 4b the lifting device according to the second embodiment in a further modified and more detailed perspective view, Fig. 5a a lifting device according to the invention in a third embodiment in a side view, Fig. 5b a section of the lifting device according to the invention in the third embodiment in a side view, and Fig. 6 another greenhouse without plants, with supply lines and a simplified lifting device according to the third embodiment.

[0045] In the Fig. 1 and in the Fig. Figure 2 is a greenhouse 1 for cultivating plants 2, such as vegetables. Supply lines 3, preferably arranged in a rail-like fashion and spaced apart from one another, are mounted on support bases 4 within the greenhouse 1. These supply lines are designed, for example, as heating pipes or water pipes and serve to heat or irrigate the plants 2. A film (not shown) may be located below the supply lines 3 and, if applicable, the support bases 4. Plant debris may accumulate on this film and must be removed. Furthermore, the film needs to be replaced after a certain period of use. As shown in the Fig. As visualized in Figure 2, the supply lines 3 must be lifted. A lifting device 5 is provided for this purpose, the lifting device 5 comprising an electrical circuit for its control. The preferably manually operated and electro-hydraulic lifting device 5 can be designed as a greenhouse supply line lifting device, which is exclusively designed for use in the greenhouse 1 in which the plants and / or vegetation are cultivated. The lifting device 5 further comprises an electrical circuit for its control.

[0046] In the Fig. Figures 3a to 3d schematically show a lifting device 5 according to a first embodiment. The lifting device 5 has a support element 6 on which, preferably, two electrical energy storage devices 7, in particular designed as batteries, are arranged. The electrical energy storage devices 7 are electrically connected to a hydraulic unit arranged on the support element 6, which comprises a hydraulic pump 8, a hydraulic cylinder 9, and a piston 10 provided in the hydraulic cylinder 9. The hydraulic unit may also include a compressor, in particular a hydraulic compressor. Furthermore, a traction device, designed at least partially as a cable pulley or alternatively as a chain pulley or block and tackle, is arranged on the support element 6. This traction device preferably comprises deflection elements 11 designed as cable pulleys or chain pulleys and at least one traction element 12 designed as a cable or alternatively as a chain.The traction device is connected to the hydraulic unit by frictional and / or positive locking. The piston 10 can be connected to the traction device, in particular to at least one deflection element 11. One end of the traction element 12 can be frictionally attached to the support element 6 and / or to a plate 33, preferably made of wood, in particular plywood, which is connected to the support element 6.

[0047] The pulling element 12 is connected to a connecting element 13 designed for lifting the supply lines 3, wherein the connecting element 13, preferably designed here as a hook, in particular as a double hook, has a first contact section 14 and a second contact section 15, each of which is at least partially complementary to a geometric shape of the outer surface of the supply line 3. The hook can be designed as a pipe hook. The hook, in particular double hook, comprises the first contact section 14 and the second contact section 15, which is arranged symmetrically to the first contact section 14 with respect to a longitudinal axis L of the connecting element 13, as can be clearly seen in the Fig. 3a can be seen. Here, the first contact section 14 and the second contact section 15 are at least partially U-shaped and are intended for the temporary and point-limited reception of a tubular, in particular round, supply line 3.

[0048] Furthermore, in the present embodiment of the lifting device 5, three wheels, in particular two rear wheels 16 and one front wheel 17, are arranged on the support element 6.

[0049] Furthermore, two handle elements 18 for guiding and controlling the lifting device 5 are arranged on the support element 6. Preferably, two support elements 19 are arranged on the support element 6, each support element 19 preferably being connected to the support element 6 via at least one support spring element (not shown in detail). The support spring elements are designed to be robust enough to bear the weight of the lifting device 5 and to compress when the supply line 3 is lifted, as the additional weight of the supply line 3 acts on the lifting device 5.

[0050] The support element 6 has a front section that is essentially V-shaped or, alternatively, U-shaped, wherein a first leg 20 and a second leg 21 of the V-shaped front section are connected to each other by a base 22. The support element 6 includes a bearing element 23 in its front section for supporting the front wheel 17 of the lifting device 5. The bearing element 23 is connected to the front section, in particular via a first support element 24 to the first leg 20, and via a second support element 25 to the second leg 21, and via a third support element 26 to the base 22 of the front section.Furthermore, a wheel suspension 27 is provided for the front wheel 17, wherein a spring element (not shown in detail) is arranged in the bearing element 23 and is connected to the wheel suspension 27 and / or the front wheel 17. When the supply line 3 is raised, a relative movement is provided between the bearing element 23 and the front wheel 17 and / or the wheel suspension 23. When the supply lines 3 are raised by means of the connecting element 13, preferably all wheels 16, 17 and support elements 19 are in contact with a floor surface of the greenhouse 1. The spring element is located in a tube above the wheel suspension 27, in particular a front wheel suspension. Under load, the front wheel 17 sinks in to such an extent that the respective support element 19 touches the ground and thus provides support.

[0051] The support element 6 has a connecting section 28, which preferably connects the first leg 20 and the second leg 21. A pivotable or rotatable first mast 29 is arranged on the connecting section 28, which may at least partially be provided for the arrangement of the traction device, in particular the deflection elements 11. The first mast 29 has a first mast section 30 and a second mast section 31, wherein the first mast section 30 and the second mast section 31 are arranged at a substantially right angle to each other.A second mast 32, designed as a guide element, is arranged at a distance from the first mast 29 on the first mast 29, in particular on the first mast section 30 and / or on the second mast section 31 of the first mast 29, and is also designed for the arrangement of the traction device, in particular the deflection elements 11, and for the arrangement and guidance of the piston 10.

[0052] Furthermore, the bearing element 23 can preferably be connected to the first mast 29, in particular to the first mast section 30 and / or second mast section 31 via a fourth support element.

[0053] A control device 34 for operating and controlling the lifting device 5, in particular for actuating the traction device, can be provided on the plate 33.

[0054] In the Fig. Figure 4a schematically shows a lifting device 5 according to a second embodiment, which has essentially the same function as the lifting device 5 according to the first embodiment. A significant difference to the embodiment according to the Fig. Sections 3a-3d consist in the lifting device comprising four wheels 35 arranged on a support element 6. The distance between two wheels 35 arranged on the support element 6, which are arranged symmetrically to each other with respect to a longitudinal axis L' provided in the direction of travel, is greater than the diameter, in particular the outer diameter, of a supply line 3, preferably of two supply lines 3 arranged side by side. Thus, the supply lines 3 can be located between two batteries 7 arranged on the support element 6, which are designed as electrical energy storage devices, when the lifting device 5 is moved along the supply lines 3.

[0055] In the Fig. 4b is a modified and more detailed variant of the lifting device 5 of the Fig. 4a shown.

[0056] The lifting device 5 has a support element 6 on which, preferably, two electrical energy storage devices 7, in particular designed as batteries, are arranged. The electrical energy storage devices 7 are electrically connected to a hydraulic unit arranged on the support element 6, which comprises a hydraulic pump 8, a hydraulic cylinder 9, and a piston 10 provided in the hydraulic cylinder 9. The hydraulic pump 8 is connected to the hydraulic cylinder 9 via connecting lines (not shown in detail), which may, for example, be arranged in or on the support element 6.

[0057] The hydraulic cylinder 9 is connected to the support element 6 by four support connecting elements 45, the support connecting elements 45 preferably being arranged on an upper, in particular uppermost, section of the lifting device 5. One end of the tensioning element 12 is preferably attached to the support element 5 and / or to the hydraulic cylinder 9 by frictional and / or positive locking.

[0058] The hydraulic unit can also include a compressor, in particular a hydraulic compressor. Furthermore, a traction device, designed as a cable pulley or alternatively as a chain pulley or block and tackle, is at least partially arranged on the support element 6. This traction device preferably comprises deflection elements 11 designed as cable pulleys or chain pulleys and at least one traction element 12 designed as a cable or alternatively as a chain. The traction device is connected to the hydraulic unit by frictional and / or positive locking. The piston 10 can be connected to the traction device, in particular to at least one deflection element 11. One end of the traction element 12 can be frictionally attached to the support element 6 and / or to a plate 33, preferably made of wood, in particular plywood, which is connected to the support element 6.

[0059] The pulling element 12 is connected to a connecting element 13 designed for lifting the supply lines 3. The connecting element 13, preferably designed as a hook, and in particular as a double hook, has a first contact section 14 and a second contact section 15, each of which is at least partially complementary to a geometric shape of the outer surface of the supply line 3. The hook can be designed as a pipe hook. The hook, in particular the double hook, comprises the first contact section 14 and the second contact section 15, which is arranged symmetrically to the first contact section 14 with respect to a longitudinal axis L of the connecting element 13. Here, the first contact section 14 and the second contact section 15 are each at least partially U-shaped and are provided for the temporary and localized engagement of a tubular, and in particular round, supply line 3.

[0060] The lifting device 5 comprises four wheels 35, which are arranged on a support element 6. The distance between two wheels 35 arranged on the support element 6, which are arranged symmetrically to each other with respect to a longitudinal axis L' provided in the direction of travel, is greater than the diameter, in particular the outer diameter, of a supply line 3, preferably of two supply lines 3 arranged side by side. Thus, the supply lines 3 can be located between two batteries 7 arranged on the support element 6, which are designed as electrical energy storage devices, when the lifting device 5 is moved along the supply lines 3, in particular a section of a supply line.

[0061] Furthermore, four handle elements 18 for guiding and controlling the lifting device 5 are arranged on the support element 6.

[0062] A control device (not shown in detail) for operating and controlling the lifting device 5, in particular for actuating the traction device, may be provided on the plate 33.

[0063] In the Fig. 5a and Fig. Figure 5b schematically shows a lifting device 5 according to a third embodiment. The lifting device 5 has a support element 6 on which, preferably, one or two electrical energy storage devices 7, in particular designed as batteries, are arranged. The electrical energy storage devices 7 are electrically connected to a hydraulic unit arranged on the support element 6, which comprises a hydraulic pump 8, a hydraulic cylinder 9, and a piston 10 provided in the hydraulic cylinder 9. The hydraulic unit may also include a compressor, in particular a hydraulic compressor. Furthermore, a traction device, designed at least partially as a cable pulley or alternatively as a chain pulley or block and tackle, is arranged on the support element 6. This traction device preferably comprises deflection elements 11 designed as cable pulleys or chain pulleys and at least one traction element 12 designed as a cable or alternatively as a chain.The traction device is connected to the hydraulic unit by frictional and / or positive locking. The piston 10 can be connected to the traction device, in particular to at least one deflection element 11. One end of the traction element 12 can be frictionally attached to the support element 6 and / or to a plate 33, preferably made of wood, in particular plywood, which is connected to the support element 6.

[0064] The pulling element 12 is connected to a connecting element 13 designed for lifting the supply lines 3. The connecting element 13, preferably designed as a hook, and in particular as a double hook, has a first contact section 14 and a second contact section 15, each of which is at least partially complementary to a geometric shape of the outer surface of the supply line 3. The hook can be designed as a pipe hook. The hook, in particular the double hook, comprises the first contact section 14 and the second contact section 15, which is arranged symmetrically to the first contact section 14 with respect to a longitudinal axis L of the connecting element 13. Here, the first contact section 14 and the second contact section 15 are each at least partially U-shaped and are provided for the temporary and localized engagement of a tubular, and in particular round, supply line 3.

[0065] Furthermore, in the present embodiment of the lifting device 5, six wheels, in particular two rear wheels 16 and two front wheels 17 and two intermediate wheels 39, are arranged on the support element 6, which serve to ensure stable movement of the lifting device 5 on the ground surface.

[0066] Furthermore, four roller elements 40, preferably made of nylon, are arranged on the support element 6 and are designed to rest on the supply line 3, particularly on a supply line section 41. The supply line section 41 is an area on which the lifting device 5 is (temporarily) located. In addition to the supply line section 41 in the Fig. 5a is located to the left of another supply line section 42. The supply lines 3 located in this supply line section 42 can be lifted by means of the lifting device 5, in particular by means of the connecting element 13.

[0067] Preferably, four roller elements 40, which may be cylindrical, are arranged on the support element 6. Each roller element 40, preferably designed as a cylindrical roller, serves to rest on the supply line 3, in particular on a supply line section 41. Furthermore, the support element 6 can be provided with at least one guide element 43, which is designed for the arrangement of the respective roller element 40. The guide elements 43 serve to ensure safe and stable movement of the lifting device 5 on the supply lines 3. In the present embodiment according to the Fig. 5a, Fig. 5b the lifting device 5 comprises four roller elements 40 and four guide elements 43, wherein each guide element 43 is assigned exactly one roller element 40.

[0068] The four wheels, in particular two front wheels 16 and two rear wheels 17, are mounted on the support element 6 as described above, in side view according to the Fig. 5a, Fig. Figure 5b shows only one front wheel 16 and one rear wheel 17 arranged, wherein the four wheels 16, 17 are spaced apart from a ground surface, in particular that of the greenhouse 1, when the supply line 3, in particular a supply line section 42, is lifted. When the supply line 3, in particular a supply line section 42, is lifted, the preferably two intermediate wheels 39 are also spaced apart from a ground surface. The rear wheels 16, the front wheels 17, and the intermediate wheels 39 can each be connected to one another by a common axle.

[0069] Furthermore, four handle elements 18 for guiding and controlling the lifting device 5 are arranged on the support element 6, wherein in the Fig. 5a only two handle elements 18 are visualized. A support element 19 is preferably arranged on the support element 6, wherein the support element 19 may preferably be connected to the support element 6 via at least one support spring element not shown in detail.

[0070] The support element 6 has a connecting section (not shown) arranged on the plate 33, which is designed for the arrangement of a pivotable or rotatable first mast 29. The first mast 29 serves, at least in part, for the arrangement of the traction device, in particular the deflection elements 11. The first mast 29 has a first mast section 30 and a second mast section 31, wherein the first mast section 30 and the second mast section 31 are arranged at a substantially right angle to each other. A second mast 32, designed as a guide element, is arranged at a distance from the first mast 29, in particular on the first mast section 30 and / or on the second mast section 31 of the first mast 29. This second mast 32 is also provided for the arrangement of the traction device, in particular the deflection elements 11, and may also be provided for the arrangement and guidance of the piston 10.

[0071] Furthermore, the first mast 29 can be connected to a stepped mast section 44, at the end of which the support element 19 can be arranged. The support element 19 can be extended by means of a further hydraulic unit when the traction device is actuated, in order to better support the lifting device 5.

[0072] A control device 34 for operating and controlling the lifting device 5, in particular for actuating the traction device, can be provided on the plate 33.

[0073] The lifting of the supply line 3 with the lifting device 5 is described below for the two previously described embodiments. Fig. 3a-3d or the Fig. 4a-4b described.

[0074] A user moves the lifting device 5 to the supply line 3 using the handles 18. The user then activates the control device 34, which starts the hydraulic unit. This moves the piston 10 vertically downwards, setting the pulling device, in particular the pulling element 12, preferably connected to the piston 10 via the deflection element 11, in motion. The connecting element 13, which is connected to the pulling element 12, moves towards the supply line 3. It would also be conceivable that, additionally and / or alternatively, the pulling device, in particular the connecting element 13, is also connected to an electric drive to allow the connecting element 13 to move more slowly towards the supply line 3 for better alignment. The hydraulic unit or, alternatively, the electric drive is stopped again using the control device 34.

[0075] In a further step, the user connects the supply line 3 to the connecting element 13. The user then activates the operating device 34, which restarts the hydraulic unit. This moves the piston 10 vertically upwards, setting the pulling device, in particular the pulling element 12, preferably connected to the piston 10 via the deflecting element 11, in motion. The connecting element 13, which is connected to the pulling element 12, moves upwards together with the supply line 3, so that the supply line 3 is positioned at a distance from the ground surface. The hydraulic unit is then stopped again by means of the operating device 34. The supply line 3 runs along a Gaussian bell curve in the raised section. The use of the hydraulic unit enables reliable, safe, fast, and time-saving lifting of the supply line 3.Within one to two seconds, the supply line 3 can be raised at least 0.5 m above the ground surface, preferably up to 1.0 m. During the raising of the supply line 3, the lifting device 5 lowers due to the weight of the raised section of the supply line 3 and is supported by the spring-loaded support elements 19. All the supply lines 3 of the greenhouse 1 are hooked into previously suspended hooks designed as further connecting elements 36, each of which is connected, for example, via a connecting rope 37 or a connecting chain, preferably to a roof structure 38 of the greenhouse 1, and remain there (see figure). Fig. 2) Only after the new foils have been installed will all the connecting lines 3 be lowered again.

[0076] As a result, the lifting device 5 can thus be used to successively lift all the supply lines 3 from the ground surface upwards into the hooks suspended from the roof structure 38, which preferably have a distance of 1.2 m from the ground surface, in order to permanently or temporarily suspend them there. Then the entire greenhouse 1 can be cleared of dirt and films, which can be up to 100 m or more in length, and the ground surface can be cleaned. Subsequently, new films, in particular film sheets, are laid, and the supply lines 3 are successively lowered from the hooks, which preferably serve as upper suspension points, back to the ground surface using the lifting device 5.

[0077] In the Fig. Figure 6 shows another greenhouse 1 in which, for example, the lifting device 5 according to the third embodiment is shown in the Fig. 5a, Fig. 5b could be used. The other lifting devices 5 described above can also be used in this greenhouse 1 according to the Fig. 6 can be used. In the Fig. 6 is the lifting device 5 according to the Fig. 5a, Fig. Figure 5b is a highly simplified visualization. In greenhouse 1, an entrance area 47 is provided for the lifting device 5, which can, for example, be designed as a door. Behind the door is a roadway section 46, preferably designed as a concrete slab, for the lifting device 5, in order to move it easily and quickly to the corresponding supply lines 3.

[0078] In greenhouse 1, supply lines 3 are preferably arranged on support bases 4 in a rail-like fashion and spaced apart from one another. These supply lines are designed, for example, as heating pipes or water pipes and serve to heat or irrigate the plants and / or vegetation (not shown in detail). A film (not shown in detail) may be located below the supply lines 3 and, if applicable, the support bases 4. Plant debris may be present on this film and must be removed. Furthermore, the film needs to be replaced after a certain period of use. As shown in the Fig. As visualized in section 6, the supply lines 3 must be lifted for this purpose. The lifting device 5 is used for this, as shown in the diagram. Fig. 5a, Fig. 5b is provided, wherein the lifting device 5 comprises an electrical circuit for controlling it. The preferably manually operated and electro-hydraulic lifting device 5 can be designed as a greenhouse supply line lifting device, which is preferably designed exclusively for use in the greenhouse 1 in which the plants and / or vegetation are cultivated. The lifting device 5 further comprises an electrical circuit for controlling it.

[0079] The following describes how to lift the supply line 3 with the lifting device 5 according to the exemplary embodiment of the Fig. 5a and Fig. 5b described.

[0080] The lifting device 5 can preferably be pushed by a user through the entrance area 47 onto the roadway section 46, with the main load of the lifting device 5 preferably acting on the central wheels 39. The front wheels 17 and the rear wheels 16 can be designed as swivel wheels. The rear wheels 16 and the front wheels 17 of the lifting device 5 can be arranged, in particular, at a distance of at least 2 cm from a surface of the roadway section 46, and the central wheels 39 can be arranged on the surface of the roadway section 46. Consequently, with a uniform weight distribution, the lifting device 5 can be designed as a seesaw, so that it can be easily pivoted or rotated about its own axis on the roadway section 46, in particular by 360 degrees.The roller elements 40 of the lifting device 5 can be arranged, in particular at a distance of at least 15 cm from the ground surface, especially the surface of the roadway section 46. This allows a user to easily and conveniently move the lifting device 5 from the roadway section 46 onto the supply lines 3, whereby the roller elements 40 then come into contact with the corresponding supply lines 3 and the rear wheels 16, the front wheels 17 and the middle wheels 39 are arranged at a distance from the ground surface.

[0081] The lifting device 5 can alternatively be pushed onto the supply lines 3, for example, by means of a ramp (not shown). In this case, the roller elements 40 come into contact with the supply lines, and the front wheels 17, the rear wheels 16, and the middle wheels 39 are then arranged at a distance from the ground surface of the greenhouse 1.

[0082] A user can move the lifting device 5 along the supply lines 3 from one supply line section 41 to the next using the handle elements 18. The user then activates the control device 34, which starts the hydraulic unit. This moves the piston 10 vertically downwards, setting the pulling device, in particular the pulling element 12, preferably connected to the piston 10 via the deflection element 11, in motion. The connecting element 13, which is connected to the pulling element 12, is moved towards the supply line 3, in particular towards the supply line section 42. It would also be conceivable that, additionally and / or alternatively, the pulling device, in particular the connecting element 13, could also be connected to an electric drive to allow the connecting element 13 to move more slowly towards the supply line 3 for better adjustment.The hydraulic system or, alternatively, the electric drive is stopped again by means of the operating device 34.

[0083] In a further step, the user connects the supply line 3, in particular the supply line section 42, to the connecting element 13. The user then activates the operating device 34, which restarts the hydraulic unit. This moves the piston 10 vertically upwards, setting the pulling device, in particular the pulling element 12, preferably connected to the piston 10 via the deflecting element 11, in motion. The connecting element 13, which is connected to the pulling element 12, moves upwards together with the supply line 3, so that the supply line 3, in particular the supply line section 42, is positioned at a distance from the ground surface. The hydraulic unit is then stopped again by means of the operating device 34. The supply line 3, in particular the supply line section 42, runs along a Gaussian bell curve in the raised section.The hydraulic unit enables reliable, safe, fast, and time-saving lifting of the supply line 3, in particular the supply line section 42. Within one to two seconds, the supply line 3, in particular the supply line section 42, can be lifted at least 0.5 m above the ground surface, preferably up to 1.0 m. During the lifting of the supply line 3, in particular the supply line section 42, the lifting device 5 is supported by means of the roller elements 40 on the supply line section 41, on which the lifting device 5 is arranged.

[0084] All supply lines 3 of the greenhouse 1 are hung in previously suspended hooks designed as further connecting elements 36, each of which is connected, for example, via a connecting rope or chain (not shown) preferably to a roof structure 38 of the greenhouse 1, and remain there (similar to the Fig. 2) Only after the new foils have been installed will all the connecting lines 3 be lowered again.

[0085] As a result, the lifting device 5 can be constructed according to the exemplary embodiment of the Fig. 3a-3d of the Fig. 4a-4b serve to connect the entire supply lines 3 or with the lifting device 5 according to the Fig. 5a, Fig. 5b, except for the last supply line section located at the edge, successively lift the supply lines 3 from the ground surface upwards into the hooks suspended from the roof structure 38, which preferably have a distance of 1.2 m from the ground surface, in order to permanently or temporarily attach them there. Then the entire greenhouse 1 can be cleared of dirt and films, which can be up to 100 m or more in length, and the ground surface can be cleaned. Subsequently, new films, in particular film sheets, are laid, and the supply lines 3 are successively lowered from the hooks, which preferably serve as upper suspension points, back to the ground surface using the lifting device 5.

[0086] In addition, the lifting device 5 according to the invention offers Fig. 5a, Fig. 5b the advantage that the pivotable first mast 29 also allows the adjacent supply lines 3 to be raised, which are arranged to the left and / or right of the supply lines 3 on which the lifting device 5 is located, as shown in the Fig. 6 is clearly visible. The first mast 29 and the associated support element 19 should preferably be arranged parallel to the supply lines 3 on which the lifting device 5 is mounted, preferably during the movement of the lifting device 5. To ensure this, the first mast 29 and the associated connecting section 44 can be pivoted or rotated in this direction so that the first mast and the connecting section 44 are aligned with the direction of travel of the lifting device 5.

[0087] Once the point is reached (approximately every 10 m) where the adjacent supply lines 3 are to be lifted, the first mast 29 can be automatically or manually rotated or pivoted in the direction of the adjacent supply line 3. The support element 19 pivots along with it, as it is connected to the first mast 29 via the connecting section 44. The lifting of the adjacent supply lines 3 is carried out as described above. The support element 19 can rest on the ground surface of the greenhouse 1, thereby providing advantageous support for the lifting device 5 and preventing it from tipping over. Reference symbol list 1 greenhouse 2 plants 3 Supply line 4 support bases 5 Lifting device 6 support element 7 electrical energy storage 8 Hydraulic pump 9 hydraulic cylinders 10 pistons 11 deflection elements 12 Pull element 13 Connecting element 14 First contact section 15 Second contact section 16 rear wheel 17" front wheel 18 handle elements 19 Support element 20 First thigh 21 Second thigh 22 base 23 Bearing element 24 First support element 25 Second support element 26 Third support element 27 Wheel suspension 28 Connecting section 29 First mast 30 First mast section 31 Second mast section 32 Second mast 33 plate 34 Operating device 35 wheels 36 Additional connecting element 37 Connecting rope 38 Roof construction 39 middle wheel 40 rolling elements 41 Supply line section 42 Adjacent supply line section to 41 43 guide elements 44 Stair-shaped mast section 45 beam connecting elements 46 Roadway section 47 Entrance area for the lifting device 5

Claims

[1] Lifting device (5) for a greenhouse (1) for lifting at least one supply line (3), in particular a supply line section (42), wherein the lifting device (5) has a support element (6) on which at least - an electrical energy storage device (7) is arranged, - a hydraulic unit electrically connected to the electrical energy storage device (7) comprising at least one hydraulic pump (8), a hydraulic cylinder (9), and a piston (10) provided in the hydraulic cylinder (9), - a traction device is arranged which comprises at least one deflection element (11) and at least one traction element (12), wherein the traction device is connected to the hydraulic unit by frictional and / or positive locking, wherein the pulling element (12) is connected to a connecting element (13) designed for lifting the supply line (3), in particular the supply line section (42), characterized by , that at least one, preferably four, roller elements (40) are arranged on the support element (6), which is designed to rest on the supply line (3), in particular on a supply line section (42), wherein the support element (6) is provided with at least one guide element (43), wherein the support element (6) and / or the guide element (43) is designed for the arrangement of the roller element (40). [2] Lifting device (5) according to claim 1, characterized by , that the connecting element (13) has at least one first contact section (14) which is at least partially complementary to a geometric shape of an outer surface of the supply line (3), in particular a round one. [3] Lifting device (5) according to claim 1 or 2, characterized by, that the connecting element (13) is designed as a hook, which comprises the first contact section (14) and preferably a second contact section (15) arranged in a mirror-symmetric manner to the first contact section (14) with respect to a longitudinal axis L of the connecting element (13). [4] Lifting device (5) according to claim 2 or 3, characterized by , that at least the first contact section (14) and preferably the second contact section (15) are at least partially U-shaped and are provided for the temporary and point-by-point reception of a tubular, in particular round, supply line (3). [5] Lifting device (5) according to at least one of the preceding claims 1 to 4, characterized by, that at least one first support element (19) and preferably a second support element (19) is arranged on the support element (6), wherein preferably each support element (19) is connected to the support element (6) via at least one support spring element. [6] Lifting device (5) according to claim 5, characterized by , that the distance between two wheels (16, 17, 35) arranged on the support element (6), which are arranged symmetrically to each other in the direction of travel, is greater than the diameter, in particular the outer diameter of a supply line (3), preferably of two supply lines (3) arranged side by side. [7] Lifting device (5) according to at least one of claims 1 to 6, characterized by , that the hydraulic cylinder (9) is connected to the support element (6) by at least one support connecting element (45), preferably by four support connecting elements (45). [8] Lifting device (5) according to at least one of claims 1 to 7, characterized by , that one end of the tension element (12) is arranged on the support element (6) or the hydraulic cylinder (9), preferably attached by friction and / or by positive locking. [9] Lifting device (5) according to at least one of the preceding claims 1 to 8, characterized by , that the piston (10) is connected to the traction device, in particular to at least one deflection element (11). [10] Lifting device (5) according to at least one of claims 1 to 9, characterized by , that during the lifting of a supply line section (42) the lifting device (5) is arranged on a supply line section (41) adjacent to the supply line section (42) to be lifted. [11] Lifting device (5) according to at least one of claims 1 to 10, characterized bythat at least two wheels (35, 39), preferably four wheels (35, 39), are arranged on the support element (6), wherein the wheels (35, 39) are arranged spaced apart from a ground surface when lifting the supply line (3), in particular a supply line section (42). [12] Lifting device (5) according to at least one of claims 1 to 11, characterized by , that the preferably manually operated lifting device (5) is designed as a greenhouse supply line lifting device. [13] Lifting device (5) according to claim 12, characterized by , that the greenhouse supply line lifting device is designed exclusively for use in a greenhouse (1) in which plants (2) and / or crops are cultivated.

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