Mobile application device that can be coupled to a vehicle with a heatable conveyor and operating method therefor

Abstract

Application device (A), which has: • a vehicle trailer (FA) which has a chassis (F) with a two-part vehicle frame (1) consisting of a front frame part (2) and a rear frame part (HR), • a fastening device (3) for the force-locking or form-locking connection of the rear frame part (HR) to a towing vehicle (4), • a coupling for the electrical and mechanical connection of the front frame part (2) to a towing vehicle (4) and • a heatable and pivotable distribution device (10) arranged on the rear frame part (HR).

Description

[0001] The invention relates to a mobile spreading device which can be coupled to a vehicle and has a heatable conveying device according to patent claim 1 and to an operating method therefor according to patent claim 12.

[0002] In road construction, roads and paths are constructed from various materials such as asphalt, concrete, paving, large format pavers, or unbound materials (e.g., gravel) (surface course and base course). For larger construction projects, construction is carried out using a paver for asphalt roads, or a concrete paver or slipform paver for concrete roads. Smaller construction projects and repairs are often carried out manually.

[0003] Important points in road construction are: • Choice of machines used, • Choice of installed material, • Consideration of environmental conditions (temperature, rain, etc.), • sufficient compaction at the correct asphalt temperature.

[0004] Insulated containers or troughs (usually with a semi-circular bottom) for transporting hot-mix asphalt have been around for a long time. Commercially available insulated containers in the road construction segment are generally cylindrical or box-shaped objects used to store hot-mix asphalt. Their insulation helps to minimize temperature loss in the asphalt during storage (e.g., during transport to the construction site). Asphalt is typically kept at paving temperature for up to 12 hours without additional heating. In addition, the hot-mix material must be protected from moisture such as rain or splash water. Insulated containers are usually attached to the transport vehicle and tilted by tilting the loading area of ​​the transport vehicle so that the hot-mix material can be tipped out of the central outlet.For processing, it is important that the mix does not lose temperature during transport and installation, otherwise the quality during installation cannot be guaranteed.

[0005] Commercially available insulated containers with double outlets are typically used in repair work, where small sections or sections need to be restored and the road must be rebuilt using different asphalt mixtures. State-of-the-art technology for this is the use of insulated containers that are divided by a partition plate in the loading chamber and, instead of a single outlet, have two separate outlets arranged side by side, one for each of the separate chambers. State-of-the-art manufacturing technology requires that the two-chamber version be specially constructed. This primarily means equipping them with two adjacent openings, two closure systems, and two discharge chutes.

[0006] Also known from DE29515998U1 is a thermal container in which the outlet of the thermal container is located off-center, preferably on the right and / or left rear side. Funnel-shaped feeders are welded into the outlet of the thermal container, which push the hot mix toward the outlet. Finally, the thermal container also has two mounting brackets on each side wall for securing it to the truck.

[0007] Furthermore, DE29716093U1 discloses a thermal container with its own tipping device. Specifically, a tubular assembly frame is mounted on the loading area of ​​a transport vehicle. The thermal container is secured to the frame on one side by two joints. A mechanically or motor-driven lifting device, also mounted on the tubular assembly frame and connected to the thermal container by a console, tilts the container. Risks for the user arise when placing / lifting the thermal container onto / off the transport vehicle, closing the lid when filling the thermal container, or unloading tools before tipping the thermal container. Different grain mixtures are used in road construction. For example, an asphalt base course with a grain size of 0.32 mm is used for the substructure, and an asphalt surface course with a grain size of 0.8 mm is used for the surface. The layers are laid one after the other.

[0008] Furthermore, DE202012104724U1 discloses a push-off vehicle for transporting hot material, in particular for transporting asphalt, comprising a trough having a discharge opening and a discharge device for discharging the hot material through the discharge opening. The trough is insulated, and to enable uniform discharge, in particular into an asphalting machine, the discharge device comprises a push-off wall arranged in the trough and movable toward the discharge opening.

[0009] By insulating the trough, premature cooling of the hot asphalt before it reaches the asphalt paving machine is prevented, thus preventing the discharge of cold asphalt pockets into the asphalt paving machine and the resulting defective asphalt surface. The push-off wall also ensures even discharge of the hot material. This means that the discharge device does not require tilting the trough to discharge the material, thus preventing uneven discharge caused by tipping. In addition, the push-off vehicle can also be used wherever there is not enough height for a tipping process. The trough is preferably defined by a trough base, two side walls, a rear wall arranged in the area of ​​the discharge opening, which is preferably designed to be pivotable, and the push-off wall.At least the side walls, but preferably also the floor, can be designed to be insulated. The discharge device is preferably designed in two stages, with a first stage being formed by a sliding floor which can be moved towards the discharge opening together with the push-off wall, and the second stage being formed by the push-off wall, which can be moved relative to the sliding floor. In this way, the effort required for the unloading process can be significantly reduced because the frictional resistance between the hot material and the trough floor is reduced by the proportional area of ​​the sliding floor. The two drives for the push-off wall and sliding floor can each be designed in a suitable manner, for example hydraulic cylinders, a traveling nut interacting with a threaded spindle, or a roller chain driven by a sprocket.According to a further embodiment, the sliding floor and / or the push-off wall can also be insulated so that the hot goods only cool down slightly on the way to the unloading point. Furthermore, the push-off wall can be provided with pre-tensioned sealing flaps that cover the two gaps between the push-off wall and the side walls. Similarly, the push-off wall can also be provided with sealing flaps that cover the gap between the push-off wall and the sliding floor. This prevents any goods from getting into the gap between the push-off wall and the respective side wall. Furthermore, the sliding floor can also have sealing flaps on a front edge facing the unloading opening, which cover the gap between the front edge of the sliding floor and the trough floor.Each gap can be covered with a plurality of sealing flaps arranged next to one another, with each sealing flap being pre-tensioned into a sealing position by an associated spring element.

[0010] In practice, it often happens that the same paver is required to pave surface or base courses of different widths. One way to increase the paving width of the paver is to mount additional attachment segments or screeds on the ends of the screed perpendicular to the working direction. These add length to all the screed's components, including the transport system for the paving material and any vibrating or tamping bars. The paving width of the paver or screed is thereby increased in increments by the width of the attachment element.Another way to vary the paving width of the road paver is to install hydraulically driven extending screeds at the outer ends of the screed, perpendicular to the working direction. These screeds can be retracted or extended relative to the screed either by the paver driver or by operators standing at the side of the screed, perpendicular to the working direction of the road paver. Using these usually hydraulically driven extending screeds, the paving width of the road paver can be continuously varied within a specified range, allowing for the paving of narrowing or widening sections of a base course.In order to achieve variable width adjustment, if required, in road pavers equipped exclusively with rigid screeds in a simple manner and without significant conversion effort, DE 102015 006250B4 discloses an attachment screed unit for attachment to a screed unit of a road paver, which for this purpose comprises a connecting screed, at least one adjustable screed which is adjustably mounted on the connecting screed and which can be adjusted between a retracted position and an extended position relative to the connecting screed, whereby the paving width of the attachment screed unit is variable, and a hydraulic adjustment device which is designed in such a way that it can adjust the at least one adjustable screed between the retracted position and the extended position, ideally continuously.The adjusting device has an electro-hydraulic unit arranged on the screed unit, which includes an electrical connection via which the electro-hydraulic unit can be supplied with electrical energy, and wherein the electro-hydraulic unit has an independent hydraulic circuit with at least one electrically driven hydraulic pump and a hydraulic actuator driven by the hydraulic pump. The screed unit according to DE102015006250B4 thus always comprises two individual screed elements, which have additional functions in addition to the pure screed functions for the paving process. The connecting screed initially represents the screed element via which the screed unit according to the invention is not directly linked to the tractor of the road paver (not even via corresponding holding arms), but via which it is always mounted or fastened to a screed, in particular a rigid screed, of the road paver.On the other hand, the connecting screed also serves as the supporting element for the adjustable screed. The adjustable screed is thus adjustable, particularly slidably, on the connecting screed, and is mounted in such a way that the total working width of the screed can be adjusted within a specified range (depending on the design, but generally from a maximum of the width of the connecting screed and the adjustable screed to a minimum of the width of the wider adjustable screed or connecting screed). The screed unit has an operating device that allows an operator to adjust the paving width of the screed unit, ideally directly on the screed unit itself. The operating device is, for example, a control panel on which control elements are located.To supply the operating device with electrical energy, it preferably uses the same energy source as the adjustment device, for example a battery arranged on the screed unit. In principle, the attachment device can, for example, comprise protruding fixing bolts and / or openings for receiving screw connections and / or corresponding fixing bolts. Preference is given to the supplementary or alternative use of a towing device, namely with at least one engagement hook protruding beyond the front side of the mounting side of the screed unit. The engagement hook is designed to thread through and engage behind the screed arranged on the road paver, in particular a rigid screed. This can significantly simplify assembly and shorten assembly times.It is therefore ideal if the fastening device is part of a mechanically actuated quick connection, for example a locking or snap connection, which can ideally be closed and opened without any external tools.

[0011] In order to provide an inexpensive transport device for a milling unit, with which on the one hand the milling unit can be transported between different locations and on the other hand the assembly process and in particular the pre-positioning of the transport device for the road milling machine can be facilitated. For this purpose, the transport device is provided with a support frame which in particular forms the base structure of the transport device. The support frame is correspondingly stable and as flat as possible. The transport device further comprises a receiving carriage for the milling unit, wherein the receiving carriage is arranged so as to be movable on the support frame, in particular in the horizontal plane. The receiving carriage thus initially provides a unit which is intended for mounting the milling unit on the transport device.The receiving carriage allows the milling unit to be moved or displaced relative to the support frame on the transport device at the same time. The transport device itself is therefore already capable of using the receiving carriage to move the milling unit into various positions relative to the base structure formed by the support frame. This particularly applies to movements of the receiving carriage in the horizontal plane when the transport device is placed on the ground. Furthermore, it is also provided that the transport device has a transport vehicle receptacle for coupling to a receiving vehicle, in particular a so-called swap body vehicle or hook lift vehicle. The transport vehicle receptacle thus refers to a device to which a receiving vehicle, with which the transport device as a whole is transported, is coupled in order to unload and / or load the transport device from the receiving vehicle.Such vehicles are generally known and are often used for loading so-called roll-off tipper bodies or similar equipment.

[0012] Furthermore, DE102017005013A1 discloses a road paver or feeder and a starting guidance aid for such a road paver or feeder. For this purpose, at least one starting guidance aid is arranged on the road paver or feeder in the outer edge region of a material hopper located transversely to the working direction, projecting in a guiding position beyond a hopper floor and the side walls in the working direction, counter to the paving direction. The starting guidance aid can be adjusted at least partially outwardly from the guiding position into an evasive position without causing damage. The edge region of the material hopper located transversely to the working direction extends, for example, over one-third, in particular one-quarter, and preferably over one-fifth, of the front side of the material hopper.This information can refer to a material hopper that is extended transversely to the working direction or to a material hopper that is retracted transversely to the working direction and preferably relates to a material hopper that is extended transversely to the working direction, since the material hopper is typically in the extended position during the transfer process of paving material from a transport vehicle into the material hopper. The approach guidance aid is arranged transversely to the working direction of the road paver or feeder next to the approach zone for the transport vehicle and is therefore located directly or shortly thereafter offset from the approach zone for the transport vehicle transversely to the working direction on the road paver or feeder. It is arranged at the front end of the road paver or feeder in such a way that it protrudes forwards over the road paver or feeder in the working direction.This starting position of the approach guidance aid is referred to as the guidance position. In the starting position, the approach guidance aid preferably protrudes as far as possible from the rest of the paver in the paving direction. Any movement of the approach guidance aid or parts thereof therefore results in the approach guidance aid, or at least parts of it, being adjusted at least partially against the paving direction. The approach guidance aid therefore extends further forward in the working direction than any other parts of the road paver or material feeder. In particular, the approach guidance aid extends further forward in the paving or working direction than the side walls of the material hopper, which in turn can sometimes also protrude beyond other parts of the road paver or material feeder in the working direction.The approach guidance aid is the part of the road paver or material feeder that extends furthest forward in the working direction and, in particular, also protrudes beyond the side walls in the working direction. In this case, the approach guidance aid does not have a material guidance and / or retention function. Rather, the approach guidance aid serves expressly and exclusively to facilitate the orientation of a driver of a transport vehicle for paving material when approaching the road paver or material feeder. In this way, the approach guidance aid offers the driver of a transport vehicle a visual aid that they can use to orient themselves when approaching the material hopper with the rear of the transport vehicle. In addition, the approach guidance aid also serves as a warning for the driver of the transport vehicle if a collision between the rear of the transport vehicle and the approach guidance aid is imminent.Should this happen, the driver of the transport vehicle knows early on that they have missed the approach zone and must correct the position of their vehicle. At the same time, the positioning of the approach guidance aid in front of the front end of the road paver or feeder in the working direction ensures that the approach guidance aid always collides with the rear of the transport vehicle before the rear of the transport vehicle can come into contact or collide with the side walls of the material hopper. Damage to the side walls of the material hopper is thus efficiently avoided. The approach guidance aid is thus deliberately placed in a potentially considerable collision zone, so that in practice it is common for collisions to occur between at least parts of the approach guidance aid and a transport vehicle.This situation is effectively addressed by designing the approach guidance aid in such a way that it can be adjusted outwards from the guidance position into an avoidance position or avoidance zone without causing any damage. From the guidance position, the approach guidance aid moves at least partially away from the interior of the bunker. Finally, two approach guidance aids can also be provided, arranged at a distance from one another transversely to the working direction. The approach guidance aids are in particular identical and / or mirrored towards the center of the machine. In particular, the two approach guidance aids enclose the approach zone for the transport vehicle between them, viewed transversely to the working direction. In this way, the approach zone is indicated on both sides by an approach guidance aid, allowing the driver of the transport vehicle to approach the road paver or feeder with particular precision for the transfer process.

[0013] Furthermore, a transport vehicle for picking up and setting down a container, in particular a swap body, is known from DE202013103654U1. The transport vehicle has a tilting frame arranged on a vehicle frame, which is pivotable about a first tilting axis running transversely to the vehicle's longitudinal axis and arranged at the rear of the vehicle frame, and provides a carriage displaceable along the tilting frame, wherein the carriage has at least one coupling element for gripping the container. The tilting frame is also pivotable about at least a second tilting axis aligned parallel to the vehicle axis. The tilting frame can be tilted when picking up and setting down the container, thereby reducing the set-down height. In addition, less force is required to raise the container to the lower set-down height and then to pull it up using the carriage with the tilting frame slightly tilted.In addition, the tipping frame adapts to the angle of the container and does not have to be pulled up over the pivot point like with normal hook lift frames. This also requires significantly less force. Furthermore, the overall height when picking up the container is lowered because the container is pulled directly onto the tipping frame and the tipping frame is lowered during the pulling up process. The lower placement height prevents part of the load from being lost over the rear wall of the container when picking up or setting down. Filled containers can therefore be pulled onto the vehicle more easily. Because the carriage with the coupling element can also be moved on the tipping frame during the picking phase, it is possible to pull the weight of the container closer to the vehicle axle. This in turn makes it possible to pick up a loaded container without completely losing the support load, which is hardly or never possible with normal hook lift frames without a tipping function.is not conceivable. Since the tipping frame can also be pivoted about at least one second tipping axis aligned parallel to the vehicle axis, the container can be unloaded not only to the rear, as with normal container vehicles, but also to at least one side. This opens up a multitude of new areas of application for the new transport vehicle. The carriage can be moved along the tipping frame by means of a chain hoist, hydraulic cylinder or spindle drive or a combination of these elements, with a slide rail guide or a roller guide for guiding the carriage on the tipping frame being conceivable. The tipping frame is preferably mounted in the area of ​​the first, second and third tipping axes by means of claw and pan bearings, which allow the tipping frame to be pivoted about both the first and the second and third tipping axes.Furthermore, the tipping frame can be equipped with rollers at its rear end on which the container rests when being picked up or set down.

[0014] Finally, DE202008001207U1 discloses a trailer for cargo with a discharge opening, a device for unloading, and a load distributor provided in the area of ​​the discharge opening for storing silage in silos. The trailer has a discharge opening, with the load distributor being formed by a distributor arm that can be pivoted back and forth. The pivoting movement of the load distributor distributes the cargo more effectively to the sides, resulting in the desired flat transverse distribution. The distributor arm is preferably mounted centrally below the floor of the trailer and is adjustable in length. The length also has a direct impact on the resulting width of the storage pile. The adjustability can be achieved, for example, by a telescopic design of the distributor arm. In detail, the distributor arm is positioned approximately centrally below the floor and extends rearward from the trailer.When the distribution arm is not needed, it can be swung or retracted beneath the ground. One end of the distribution arm is pivotally mounted on the trailer. Furthermore, the height of the other end of the distribution arm can be adjusted. For example, the distribution arm can be positioned roughly parallel to the ground or angled downwards from the trailer. By adjusting the length of the distribution arm, the height of the protruding end of the distribution arm, and the speed of the pivoting movement, the effect of the distribution arm can be specifically tailored to the load and the desired lateral distribution.

[0015] As the above assessment of the state of the art demonstrates, variously designed vehicles for the transport or discharge of bulk material, including the distribution of the load across different widths, are known. However, specific boundary conditions arise depending on the bulk material to be discharged. In particular, whether it is the transport and discharge of hot asphalt or silage or similar. However, in practice, there is no cost-effective mobile spreading device that is equally suitable for small to large construction projects, especially asphalting irregularly shaped areas. This should ensure a rapid workflow when asphalting large areas with fewer personnel and a reduction in downtime.Accordingly, a cost-effective, easy-to-use spreading device is lacking, one that would enable a consistent flow of bulk material at a nearly constant temperature and reliably avoid safety risks for the operator. This is particularly important because the road construction machinery industry is considered a progressive, development-oriented industry that quickly embraces and implements improvements and simplifications.

[0016] The invention is based on the object of designing a spreading device with a distribution device in such a way that it enables a rapid workflow and a uniform flow of bulk material with approximately the same temperature and reliably avoids a safety risk for the user.

[0017] This object is achieved, according to claim 1, by a spreading device which comprises: • a vehicle trailer which has a chassis with a two-part vehicle frame consisting of a front frame part and a rear frame part, • a fastening device for the force-locking or form-locking connection of the rear frame part to a towing vehicle, • a coupling for the electrical and mechanical connection of the front frame part with a towing vehicle and • a heated and pivoting distribution device arranged on the rear frame part.

[0018] Furthermore, this object is achieved, according to patent claim 10, by a spreading device in which, after its delivery to the construction site or at the place of use: a) the two-part vehicle frame is disassembled, b) the front frame part is parked, c) the rear frame part is attached to the towing vehicle using the fastening device and d) the heated and pivoting distribution device is put into operation and is pulled by the towing vehicle.

[0019] The mobile spreading device and the operating method according to the invention have the advantage that only one user is required to disassemble the spreading device and attach it to the towing vehicle in a few simple steps after it has been delivered to the construction site or at the place of use.

[0020] In a further development of the invention, according to claim 2, the front frame part and the rear frame part are designed as plug-in frames.

[0021] This development of the invention has the advantage that even an inexperienced user can perform a simple and quick plug-in assembly. Each frame section is U-shaped and rigid at the frame corners. At the leg end, each frame section can be designed as an open plug-in frame (round tube, rectangular tube), with the frame base being smaller than the corresponding frame receptacle (male and female plug-in receptacle).

[0022] In a preferred embodiment of the invention, according to claim 3, the rear frame part has two coaxially spaced-apart individual wheels of the chassis and carries the distribution device.

[0023] This embodiment of the invention has the advantage of achieving greater maneuverability (smaller turning circle). To achieve a balanced weight distribution and largely avoid top-heaviness, the heavy parts of the mobile application device are arranged in the area of ​​the individual wheels.

[0024] Further advantages and details can be found in the following description of preferred embodiments of the invention with reference to the drawing. In the drawing: Fig. 1 in side view an embodiment of the application device according to the invention, Fig. 2a, Fig. 2b in perspective view and side view the application device according to Fig. 1 disassembled into front and rear frame parts, Fig. 3 in perspective view the spreading device attached to a towing vehicle, Fig. 4 in side view the combination of application device and towing vehicle after Fig. 3 Fig. 5 in plan view the application device Fig. 1 with the distribution device in edge position, Fig. 6 in plan view the application device Fig. 1 with the distribution device positioned in the middle area and Fig. 7 the rear frame part with two insertable additional wheels.

[0025] Fig. 1 to Fig. 7 show an embodiment of a spreading device A according to the invention. Specifically, the spreading device A comprises a vehicle trailer FA, a fastening device 3 and a coupling 11 for connection to a towing vehicle 4, as well as a pivotable distribution device 10 arranged on the vehicle trailer FA.

[0026] Preferably, the chassis F is in two parts and can be disassembled into a front frame part 2 and a rear frame part HR. Fig. Figure 2 shows the positive connection by means of a plug-in frame 3 (frame tube, in particular rectangular), which can be released by pulling. To prevent the connection from coming loose during transport to the construction site, both frame parts 2, HR are secured by connecting elements, in particular bolts B or pins.

[0027] The rear frame section HR has two coaxially spaced-apart individual wheels E3, E4 of the chassis F and carries the distribution device 10. The front frame section 2 has a vehicle drawbar D and a support device S attached to it. Similar to rigid drawbar trailers, the drawbar D is rigidly connected to the front frame section 2. Since the support load exceeds 50 kg, the support device S is height-adjustable. Fig. 2 shows support wheels SR arranged on both sides and adjustable in height via a crank K. Furthermore, the front frame part 2 has a trailer coupling 11, which is designed in particular as a towing eye for a bolt coupling, jaw coupling, or ball coupling on the towing vehicle 4. According to current regulations, the FA trailer does not have its own brake (currently up to 750 kg).

[0028] The front frame part 2 has tail, brake and indicator lights as well as at least one rear fog light, which, similar to commercially available trailers, are connected to the corresponding electrical connections of the towing vehicle 4 via a detachable plug connection not shown in the drawing.

[0029] The pivotable distribution device 10 is preferably in the range of 2.5 m to 3.0 m long and is pivoted in particular by means of a hydraulic motor 5. The hydraulic motor 5 also serves as a transport lock, which can be additionally reinforced by means of a mechanical lock (e.g., bolts).

[0030] The fastening device 3 is preferably designed as a pivoting, hook-shaped coupling element which engages with or partially encloses a cross member 12 (also called a rigid beam) of the towing vehicle 4. The cross member 12 therefore has a dual function: as an underrun guard, it prevents smaller vehicles (cars, two-wheelers) from driving under the superstructure, wheels, or chassis of a larger truck or trailer in the event of a road traffic accident, and it also serves as an abutment for the fastening device 3. Furthermore, for reasons of road safety, a chain tensioner (not shown in the drawing) can also be provided, since the towing vehicle 4 is moving during operation of the application device A.

[0031] The distribution device 10 (also called mastic asphalt distributor) has a first and a second pivoting arm 6, 8. During operation of the spreading device A, the first pivoting arm 6 is connected via a chute RU (also called a chute, transfer chute) to the outlet 7 of a thermal container T (also called a thermal trough, thermal container, mastic asphalt cooker) arranged on the towing vehicle 4, see Fig. 4.

[0032] A closure system (not shown in the drawing) of the thermal container T is designed as a discharge slide that can be actuated via a toggle lever, and at least one side guard that can be pivoted out during operation is arranged laterally next to the outlet 7. To prevent clumping and to increase the flow rate with viscous material, such as hot asphalt, vibration can be generated during discharge by means of the chute RU (vibrating chute) or conveyor belt (vibrating belt with a non-circular shaft). The spreading device A has a funnel-shaped receptacle (not shown in the drawing) that encloses the open conveying area of ​​the chute RU. Preferably, the first pivot arm 6 is heated and hydraulically pivotable with a pivot radius of 180° to the left and right. For example, Fig. As shown in Figure 3, its position is fixed below the hopper and can be rotated like a crane. To ensure even heating during continuous discharge via a screw conveyor, the screw conveyor can extend into the hopper-shaped intake, thus ensuring continuous mixing of the bulk material / hot asphalt.

[0033] The first swivel arm 6 has a swivel joint SG at one end and a rotary joint DR and a locking slide 9 at the other end.

[0034] Preferably, the second pivot arm 8 (also called the discharge spout), which is rotatable by means of a swivel joint DR and positioned at an angle to the first pivot arm 6, has a shorter length in the direction of extension. The second pivot arm 8 can also be equipped with a screw conveyor. Hopper plates and electric or gas-powered heating devices can be installed between the individual screw drives of the screw conveyors to prevent buildup. For service and repair, a cover (screw cover) is provided at the upper end of the screw conveyor, and a hinged cover is provided at the upper end of the second pivot arm 8.

[0035] Preferably, the second pivot arm 8 is adjustable in length. In this case, gradually tapered sections (segments) are telescoped into one another, with the largest section in terms of circumference, viewed in the outflow direction, lying close to the surface to be asphalted. The telescoping function is usually performed manually; alternatively, it can also be performed hydraulically (with the corresponding additional effort).

[0036] When used on a construction site, the additional wheels 15 are folded down (folding down not shown in the drawing) or inserted into the holder of the rear frame part (L-shaped support 17, see Fig. 7) and secured (in particular by means of bolts), which ensures a secure position of the spreading device A independently of the towing vehicle 4 to which it is coupled.

[0037] Furthermore, foldable or sliding mudguards 16 are provided over the individual wheels E1, E2 (see Fig. 2a and Fig.7) is provided, which enables the first swivel arm 6 to be swivelled 180° left and right.

[0038] In summary, the operating procedure of the application device A according to the invention after its delivery to the construction site or at the place of use can be described as follows: a) the two-part vehicle frame 1 is disassembled, b) the front frame part 2 is put down, c) the rear frame part HR is attached to the towing vehicle 4 using the fastening device 3 and d) the heatable and pivotable distribution device 10 is put into operation and pulled by the towing vehicle 4.

[0039] The mobile and adaptable mastic asphalt distributor 10 is preferably used to distribute the hot mastic asphalt on the construction site. The pluggable vehicle frame 1 is easily disassembled after delivery of the mastic asphalt distributor 10 to the construction site or at the site of use.

[0040] The front plug-in frame 2 with the vehicle drawbar D is parked, and the mastic asphalt distributor 10 can be attached to various trucks or truck trailers 4 via an adaptable and adjustable clamping device 3. After connecting the mastic asphalt distributor 10 to the truck / trailer 4, the mastic asphalt distributor 10 is moved or pulled over the truck / trailer 4.

[0041] After emptying the thermal container T (also called mastic asphalt cooker), the mastic asphalt distributor 10 can be easily converted to the next truck / trailer 4.

[0042] The mastic asphalt distributor 10 has its own power supply through a gasoline / diesel engine or electric battery drive 5. This power supply operates the hydraulics and the power supply of the heating elements.

[0043] After the mastic asphalt distributor 10 is installed, the mastic asphalt can be conveyed via a heated, hydraulically pivoting first conveyor auger arm 6 with a pivoting radius of 180° to the left and right. For this purpose, the mastic asphalt is fed from the mastic asphalt cooker T into the mastic asphalt distributor 10 via the opening of the boiler slide.

[0044] At the end of the first conveyor arm 6 is a second heated and hydraulically rotatable swivel arm 8, which can rotate 360°. This second swivel arm 8 can be equipped with or without a conveyor screw and with a remote-controlled shut-off valve 9. The discharge quantity or discharge speed can be controlled; in particular, the speed of the conveyor screw is controlled via the remote control.

[0045] This second swivel arm 8 is interchangeable via a connector and can be customized in length, shape, and configuration (auger, stator rotor, conveyor belt). The short length of the second swivel arm 8 allows for quick adjustment at the application location of the mastic asphalt spreader.

[0046] Both arms 6 and 8 are electrically heated and controlled by a radio remote control. This allows the operator to control the quantity and application location directly at the discharge point of the mastic asphalt distributor 10, while also removing the operator from the emission zone of the mastic asphalt vapors.

[0047] After being conveyed via a screw conveyor, the mastic asphalt is applied to the surface via the heated or unheated, insulated discharge nozzle 8.

[0048] The 360° rotation of the discharge nozzle 8 enables extremely fast and flexible material application. Precise dosing is possible even in difficult locations. The time required to change the spreading material from side to side is also significantly reduced by pivoting only one boom arm (pivot arm 6).

[0049] The ability to adjust the length of the discharge nozzle 8 also allows the material to be applied extremely close to the surface, counteracting any potential heat loss from the mastic asphalt. Overall, the spreading area can be controlled in terms of both the spreading width (first pivoting arm 6) and the spreading height (second pivoting arm 8). For example, two rotary knobs are provided on a remote control (control device) so that, for example, in edge areas or irregularly shaped areas, the rotation and / or height adjustment of the discharge nozzle 8 can be adjusted or deactivated via radio remote control. Two people control the application from the thermal container T (thermal trough, thermal container, mastic asphalt cooker) and from the mastic asphalt distributor 10, while a third person smooths the spreading material (here, hot asphalt).Within the scope of the invention, a remote control can be provided for both application controls, for which a common interface and receiver are provided on both remote controls.

[0050] The invention is not limited to the illustrated and described embodiments, but also includes all embodiments of the mobile application device A according to the invention that have the same effect within the meaning of the invention, ie the invention is only limited by the patent claims. List of reference symbols: 1 vehicle frame (pluggable, two-part) 2 front frame part (with vehicle drawbar D) 3 Fastening device (clamping device, adaptable and adjustable) 4 towing vehicle (truck, trailer) 5 Drive (petrol / diesel engine or electric battery drive) 6 1. Swivel arm (heated, hydraulically rotatable, interchangeable) 7 Outlet (thermal container, thermo trough, thermo container,) 8 2. Swivel arm (heated outlet spout, hydraulically swiveling) 9 locking slides (of 6) 10 Distribution device (mastic asphalt distributor, carried by the vehicle frame 1) 11 Trailer hitch 12 cross members (rigid beam, rear underrun protection of the towing vehicle) 15 Additional wheel (slidable) 16 mudguard (foldable or insertable) 17 L-shaped carrier (for additional wheel 15) A spreading device B Bolt (transport lock) D Vehicle drawbar (on front frame part 2) DR swivel joint (between 1st and 2nd swivel arm) E1, E2 single wheels F chassis FA vehicle trailer HR rear frame part (pluggable) K Crank S Support device (trailer support wheel on the vehicle drawbar D) SR support wheel SR swivel joint T Thermo container (thermal trough, thermo container, mastic asphalt cooker) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 29515998U1

[0006] DE 29716093U1

[0007] DE 202012104724U1

[0008] DE 102015 006250B4

[0010] DE 102015016672A1

[0011] DE 102017005013A1

[0012] DE 202013103654U1

[0013] DE 202008001207U1

[0014]

Claims

[1] Application device (A), which has: • a vehicle trailer (FA) which has a chassis (F) with a two-part vehicle frame (1) consisting of a front frame part (2) and a rear frame part (HR), • a fastening device (3) for the force-locking or form-locking connection of the rear frame part (HR) to a towing vehicle (4), • a coupling for the electrical and mechanical connection of the front frame part (2) to a towing vehicle (4) and • a heatable and pivotable distribution device (10) arranged on the rear frame part (HR). [2] Application device (A) according to claim 1, characterized by that the front frame part (2) and the rear frame part (HR) are designed as plug-in frames. [3] Application device (A) according to one or more of claims 1 and claim 2, characterized bythat the rear frame part (HR) has two coaxially spaced-apart individual wheels (E3, E4) of the chassis (F) and carries the distribution device (10). [4] Application device (A) according to one or more of claims 1 to 3, characterized by that the front frame part (2) has a vehicle drawbar (D) and a support device (S) attached to it. [5] Application device (A) according to one or more of claims 1 to 4, characterized by that the fastening device (3) is designed as a pivotable, flexible coupling element which engages with a cross member of the towing vehicle (12) or partially encloses it. [6] Application device (A) according to one or more of claims 1 to 5, characterized bythat the distribution device (10) has a first and a second pivoting arm (6, 8) and that in operation the first pivoting arm (6) is connected via a chute (RU) to the outlet (7) of a thermal container or asphalt / mastic asphalt cooker (T) arranged on the towing vehicle (4). [7] Application device (A) according to one or more of claims 1 to 6, characterized by that the first pivot arm (6) has a pivot joint (SG) at one end and a rotary joint (DR) and a locking slide (9) at the other end, and that the second pivot arm (8), which is rotatable by means of a rotary joint (DR) and is at an angle to the first pivot arm (6), has a smaller length in the direction of extension. [8] Application device (A) according to claim 7, characterized by that the second swivel arm (8) is adjustable in length. [9] Application device (A) according to one or more of claims 1 to 8, characterized bythat it has its own energy supply through a petrol / diesel engine or electric battery drive (5) and that both swivel arms (6, 8) can be remotely controlled by means of a freely configurable radio remote control. [10] Application device (A) according to one or more of claims 1 to 9, characterized by that two additional wheels (15) can be inserted into the rear frame part (HR). [11] Application device (A) according to one or more of claims 1 to 10, characterized by that foldable or pivotable mudguards (16) are arranged above the individual wheels (E1, E2). [12] Operating method for a spreading device (A) according to claim 1, in which, after its delivery to the construction site or at the place of use: a) the two-part vehicle frame (1) is disassembled, b) the front frame part (2) is put down, c) the rear frame part (HR) is fastened to the towing vehicle (4) using the fastening device (3) and d) the heatable and pivotable distribution device (10) is put into operation and is pulled by the towing vehicle (4). [13] Operating method according to claim 12, wherein in the step: b1) two additional wheels (15) can be attached to the rear frame part (HR) or are foldable.

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