EP0241827A2 - Device for carrying a fork-lift truck by a lorry - Google Patents

Abstract

In order to be able to take a forklift (30) with a lifting mechanism (35, 36, 37), which is preferably designed as a self-lifting mechanism, on a truck (1), the receiving means (10) at the rear of the truck (1) for the fork of the forklift are for positive locking and fixing an adapter (20) is provided, the adapter (20) being designed according to the particular embodiment of the fork of the forklift (30) and the forklift (30) and / or its fork with the adapter (20) and the adapter ( 20) are releasably connectable to the receiving means (10).

Description

The innovation relates to a device for carrying a forklift truck with trucks, the truck having on its rear side means for receiving the load-receiving means / fork of the forklift truck and the forklift truck is provided with a lifting mechanism, preferably designed as a self-lifting mechanism, for example with a double-acting hydraulic cylinder .

For many loading and unloading tasks, forklifts are required at the place of loading or unloading, which are not always available at this place. For this reason, it is advisable if the forklift can be carried with the truck carrying out the transport. For this purpose, the forklift can be parked on the truck bed, for example; however, this reduces the loading capacity. In order to keep the load area of the truck available in full, it has already been proposed (DE-OS 26 30 774) to insert the load handler / fork of the forklift into a holder provided on the rear of the truck and fix it there for transport, whereby the chassis of the forklift is raised by "lowering" the specified load-carrying means and can thus be carried at the rear of the truck. This can be carried out particularly advantageously if the lifting mechanism of the forklift permits "self-lifting", for example as a result of a double-acting hydraulic cylinder or other mechanically acting means. Safe transport presupposes that the load handling device or the forklift is connected to the truck by releasable locking devices.

The receiving device is in each case parked on a specific forklift, it is also an integral part of the truck. As a result, the transport of forklifts on this truck is restricted to the type of forklift concerned; moreover, the receiving device provided with all safety devices reduces the loading capacity by reducing the payload.

This is where the innovation comes in, which is based on the task of specifying a generic device that can be used in a variety of ways and only insignificantly reduces the payload of the truck when not in use; In addition, the device, the receiving means of which should be able to be fastened easily and without reference to a type of forklift under the loading area of the truck in the rear area, should allow simple and safe operation.

This object is achieved according to the innovation in that the receiving means for the fork of the forklift are designed to positively receive and fix an adapter for the particular design of the fork, the forklift and / or its fork being releasably connected to the adapter. This embodiment ensures that the truck-fixed receiving device is designed for an adapter, which in turn receives the load-carrying means / fork of the truck. In this case, the receiving means are set up for the positive reception of the adapter, the positive reception being required only in partial areas, for example at the end of the adapter. In contrast to the means of admission on the truck that is independent of the type of forklift truck, the adapter itself is set to the respective type of forklift truck. Due to the similarity of the adapters, different types of forklift trucks can be carried along by the trucks equipped with a receiving device for these adapters. The means for receiving the adapter can be designed to be light and simple, so that they do not represent a significant economic value when firmly connected to the truck and, moreover, do not noticeably reduce the payload that can be transported by the truck. The adapter that can be inserted into the receiving means and that can be manufactured as an accessory for the forklift can thus be easily adjusted to the type of forklift. With this configuration, it is possible to provide an entire fleet of trucks with holding devices, to have suitable adapters available for the existing forklift trucks, the number of forklifts generally being less than the number of trucks and only those trucks which are to carry a forklift truck , must be provided with an adapter to accommodate the forklift. The economic value is made clear by the fact that in many distribution tasks, loading or unloading takes place in most cases at locations where handling equipment is available. Forklifts only have to be carried in a few cases, from which it becomes clear that the carrying only takes place with a certain load dare is necessary.

In addition, it is proposed that the adapter be provided with fold-out or extendable supports designed as supports for the claws of the forklift. By means of these supports, the load of the forklift truck carried is caught and transferred to the receiving means on the truck via the adapter; this relieves the load on the forklift's lifting mechanism.

One embodiment is given in that the receiving means for the adapter is formed approximately box-like from two U-profiles facing one another with their open sides and connected with cross struts, cross struts being firmly connected to the chassis of the truck, preferably to its longitudinal beams. In addition, it is proposed that the adapter consists of two further U-profiles, which can be inserted approximately form-fittingly into the U-profiles of the adapter receptacle, the rear ends of which are at a smaller distance from one another than their front ends, the front ends being marked by a circumferential one Frames are connected to each other and the circumferential frame and corrosponding to it the adapter receptacle are provided with locking means. This configuration proposes an adapter receptacle that is easy to attach to the truck, the force-absorbing parts of which are designed as dimensionally stable U-profiles. The power transmission to the load-bearing parts of the truck chassis takes place via cross struts. It is also conceivable that cross members extending between the longitudinal members of the motor vehicle chassis are used as bearings for the adapter receptacle. The adapter that can be inserted into the adapter receptacle is slightly wedge-shaped due to its special design. This facilitates the insertion of the load suspension devices and ensures their central position. The positive connection required for power transmission is achieved through the flanges of the U-profiles. The front end of the adapter (facing the insertion opening) lies essentially in a form-fitting manner into the mouth of the adapter receptacle, the surrounding frame projecting over the adapter receptacle.

Another suggestion is that the vertical parts of the peripheral frame each have a downward extension, at the lower ends of which the claw supports are provided. These claw supports are - according to a further proposal - guided and stored as telescopic extensions in the lower ends of the downward-pointing extensions, approximately horizontally extending and oriented at right angles to the longitudinal direction of trucks or forklifts. This arrangement results in a firm connection of the claw supports to the adapter, the force being transmitted through the downward-facing extensions attached to the vertical parts of the peripheral frame. The telescopic extendability of the claw supports allows for a slim design, whereby the extension length means that they can be adapted to different truck widths.

A preferred embodiment of the tubular receptacles for the claw supports is given by the fact that they are designed as C-profiles covered with a flat profile, in which the inner telescopic extensions of the extendable claw supports, which are designed as rectangular hollow profiles, are mounted, the C-profiles towards the longitudinal center extended and connected. According to this proposal, the tubular receptacles are formed in that the C-profiles are supplemented by a cover profile to form a piece of pipe, at least in the area of the attachment to the vertically extending extensions. The rectangular profiles are arranged so that their long side is vertical, which leads to a corresponding capacity for loads.

Another proposal is that the elongated C-profiles of the tubular receptacles for the claw supports have an inward inclination given the WinkeloC have and that - according to a further proposal - the claw supports are provided with a pull-out protection. Due to the inward inclination, there is no need to fix the claw supports, since when the truck travels without a forklift truck, as a result of the inclination, they tend to remain in the inserted state. The pull-out protection, in the simplest case a screw inserted into the support, which bumps against the end of the C-profile, prevents the claw supports from being lost.

In a preferred embodiment, the fold-out or extendable claw supports are arranged to be height-adjustable. For this purpose, it is proposed in particular that the two extensions of the vertical parts of the circumferential adapter frame have a series of holes, the holes being arranged one below the other and at a distance from one another, and that the claw supports have means which interact with these holes in the sense of height adjustability. According to a further proposal, these means, which enable the height adjustability, are designed as at least one of the vertical sides of the tubular receptacles which extends upwards and is provided with a hole. An advantageous further development is given in that both extensions of the vertical frame parts are each formed by a pair of corrosponding perforated flat profiles, the distance between the flat profiles corresponding to the outer width of the tubular receptacles for the claw supports and preferably both vertical sides of the tubular receptacles each are provided with a tab. The height adjustability enables the compensation of different height conditions; this improves the possible uses of the device. In order to adjust the height of the claw supports, the extensions of the vertical parts of the surrounding frame are used, which are provided with holes arranged one below the other. The spacing of these holes - the same on both sides - allows the claw supports to be attached due to the means provided on them that interact with the holes. This means can be designed as a longitudinal side of the rectangular tube of the claw holder, the tab being extended upwards, a bolt, a screw or the like ensuring the fixing of the tubular holder on the downward-pointing extension. When designing the downward extension as a double profile, it is expedient to guide the tubular receptacle between the two flat profiles, with a uniform force distribution being achieved in that both vertical sides of the tubular cantilever support receptacle are each provided with a perforated tab. It goes without saying that the holes are aligned with one another for connection.

A locking form of adapter receptacle and adapter is given in that the locking means are designed as pins on the adapter receptacle, preferably on the front, upper end bracket, each of which is assigned a hole in the circumferential frame of the adapter, the pin guided through the hole using a Spring pin or the like can be secured. The plug-in pin securing proposed here does justice to the practical requirements, especially since the securing spring pin can be selected according to the forces that occur. Since the adapter can be inserted into the adapter receptacle before it is connected to the forklift, the pin lock is also accessible in any case, so that the adapter can be attached easily after it has been inserted.

Another form of performance is given by the fact that at the level of the insertion opening of the adapter there is provided an insertable support rod which extends transversely to the insertion direction and is supported and guided by at least one tubular bearing on each of the two: vertical parts of the peripheral frame of the adapter. In addition, it is proposed that a middle bearing is provided as a fork bearing projecting from below for the support rod, the middle bearing being placed on the lower of the horizontal parts of the peripheral frame. Finally, it is proposed that the insertable support rod cooperates with a closure part, the closure part having a pin, and the pin can be inserted and inserted into a forklift-proof tab with a corrosive hole, preferably on the load-carrying means of the truck. The insertion height is reduced by this rod. The consequence of this is that the adapter can be equipped with an insertion height that enables easy insertion of the load suspension device. In order to avoid unwanted play and tilting of the truck, the insertion height is reduced accordingly by the insertable rod. It goes without saying that this is done before lowering the load handler to raise the chassis. In addition, this rod transmits the forces that are exerted by the parts of the load handler near the forklift directly to the circumferential angle frame and thus to the adapter holder.

• Fig. 1 eine schematische Übersicht des Hecks eines Lastkraftwagens mit mitgeführtem Gabelstapler
• Fig. 2 Adapter und Adapteraufnahme (gebrochen) in Seit-Ansicht und Aufsicht
• Fig. 3 Adapter-Aufnahme mit eingesetztem Adapter von der Rückseite gesehen
• Fig. 4 Adapter-Aufnahme mit eingesetztem Adapter von oben gesehen
• Fig. 5 Adapter-Aufnahme mit eingesetztem Adapter, Seit- ansicht
• Fig. 6 Einzelheit rohrförmige Aufnahme für Pratzenstützen, höhenverstellbar
• Fig. 7 Rohrstück der Pratzenstützen-Aufnahme mit Teleskopauszug und Auszugssicherung (geschnitten)
• Fig. 8 rohrförmige Pratzenstützen-Aufnahme mit (geschnittener Pratzenstütze und Auszugssicherung)
• Fig. 9 Zapfensicherung zwischen Adapterhalter und Adapter
• Fig. 10 Gabellager für Stützstange
• Fig. 11 Verschlußmittel für Stützstange

The essence of the innovation is explained in more detail with reference to Figures 1 to 11; show

• Fig. 1 is a schematic overview of the rear of a truck with a forklift
• Fig. 2 adapter and adapter receptacle (broken) in side view and top view
• Fig. 3 seen adapter adapter with the adapter inserted from the rear
• Fig. 4 seen adapter adapter with inserted adapter from above
• Fig. 5 Adapter holder with inserted adapter, side view
• Fig. 6 detail tubular receptacle for claw supports, height adjustable
• Fig. 7 Pipe section of the bracket support with telescopic extension and pull-out protection (cut)
• Fig. 8 tubular bracket support with (cut bracket and pull-out protection)
• Fig. 9 locking pin between adapter holder and adapter
• Fig. 10 fork bearing for support rod
• Fig. 11 closure means for support rod

1 shows the rear of a truck 1, the chassis of which supports the loading platform 2 with the loading walls 2.1 with the side members 4, the superstructures being covered with the tarpaulins 6. On the side member 4 is the axle attachment for the rear wheel 3 and the rear end wall, which is in particular also provided with the tail lights 7. The receiving means 10 for the adapter 20 is located under the loading platform 2. The longitudinal U-profiles 11 extend below the loading platform 2; at the rear - front - end there is the mounting bracket 13 as a stop for the peripheral frame 22 (FIG. 2) of the adapter. Pins 14 provided on the adapter receptacle allow the exact positioning of the adapter and its secure fixing with the spring pin 14.1 (FIG. 9). The forklift 13 - shown here with a drawbar 32 - consists of the chassis structure 31 and the rear chassis 32, as well as the claws 34 fixedly connected to the lifting frame 35. Movable up and down in the lifting frame by means of the hydraulic cylinder 36 (and via the telescopic chains 37 extendable telescopically) is the load suspension device with the load suspension plate 38 and the prongs 38.1 of the load suspension fork. The load suspension fork is inserted into the adapter 22 and with it into the adapter receptacle 10. Downwardly extending extensions 23 carry the extendable claw supports 25.1 (FIG. 3) with the end plates 25.2 preventing slipping. The adapter pull-outs are stored and guided in the transverse profile 25.

2 shows the adapter receptacle 10 and the adapter in (still) separate condition, the side view and the top view being shown. The adapter receptacle 10 consists of the two longitudinally open U-profiles 11, which are provided with a rear end plate 16 and with an upper front end bracket 32. Other cross struts, which are not shown here, stabilize this box-like structure. The upper front end bracket 13.2 is provided with pins 14 which serve as securing means for the adapter to be inserted. The adapter 20 also consists of two mutually open U-profiles 21 which are fixed against one another with a rear end profile 21.3 and with the front circumferential frame 22. The determination is made so that the rear ends 21.1 of the U-profiles are narrower than the front ends 21.2.

This slightly wedge-shaped shape enables "self-centering" insertion of the fork-shaped load handler of the forklift. To limit the receiving height, the support rod 26 is provided, which is supported and guided on both sides in end bearings 26.1 and which is supported by a central fork bearing 26.2. The vertically extending part of the peripheral frame 22 is extended downward with an extension tab 23 in which bores 23.1 are provided. The design as a double flap with a width corresponding to the tubular claw support receptacle makes it possible to guide this receptacle between the two flat profiles and to fix it in the holes 23.1 according to the desired height.

FIGS. 3, 4 and 5 show the individual relationships again in detail, FIG. 3 in particular revealing the inclined position of the U-profiles 21, and the holes 24 in the peripheral frame 22 receiving the pins 14. The telescopically extendable claw supports 25.1 are drawn unequally far in the illustration of FIG. 3 for clarity. In normal practice, however, the excerpt will be the same on both sides. The claws 34 - indicated by dashed lines - illustrate how the load transfer from the forklift to the adapter takes place. Likewise, the retracted tines 38 of the load handler of the forklift 30 (shown in broken lines) are shown in FIGS. 4 and 5; this makes their position within the adapter accommodated by the adapter receptacle 10 clear.

Fig. 6 shows the design of the tubular receptacle 25 as between a pair of flat profiles 23 (Fig. 5) to be inserted height-adjustable part. The C-profile 25 is closed with a plate-shaped flat profile 25.3 to form a tubular piece; the vertical parts are extended with tabs 25.4. Holes 25.5 are provided in the extension tabs 25.4, which, together with the holes 23.1 on the flat profile extensions, ensure the height adjustability.

Figures 7 and 8 show the telescopic extension again in detail; the rectangular profile 25.1 is the claw support which is mounted and guided in the interior of the tubular receptacle 25.

The cover profile 25.3 extends only over a certain length, so that there remains space for the pull-out protection screwed into the longitudinal wall of the rectangular profile of the claw support 25.1 as a screw. It goes without saying that with the mutually inclined guidance of the C-profiles according to the Winkelol (Fig. 3) with this type of pull-out protection, the length of the plate-shaped cover and thus the pipe section 25 can only be guided to such an extent that a sufficient pull-out path is obtained remains.

FIG. 9 shows the detail of the locking of the adapter on the adapter receptacle, the adapter being indicated only with its vertical part 22.1 of its surrounding frame and the adapter receptacle with the upper front end bracket 13.2. A pin 14 fastened to the upper front end bracket 13.2 engages through the bore 24 provided in the peripheral frame 22 (FIG. 3). A locking pin 14.1 guided into a transverse bore through the pin 14 blocks the connection.

Fig. 10 shows the middle fork bearing to support the support rod 26. For this purpose, tabs 26.2 are placed on the lower part of the circumferential frame 22.2 - which is shown in the illustration here and in FIG. 5 as a hollow profile - the crossbar 26.3 fork-shaped bearing to accommodate the Form support rod 26.

11 finally shows the locking device 27 which interacts with the support rod, shown here as a lever part 27.1 with handle 27.2 which is fixedly connected to the support rod 26. A pin 27.3 with a conical insertion is provided on the lever 27.2 and has a transverse bore 27.4. This pin 27.3 can be inserted into a corresponding fixing lug 39 with a hole 39.1, the fixing lug being firmly connected to the forklift 30 (only indicated here). In the round version of the support rod and in the correspondingly adapted bearings, the locking can be done by turning from the (unlocked) position shown in broken lines, the bore 39.1 must have a shape adapted to the rotational movement of the pin.

Claims (17)

1. Device for carrying a forklift truck by truck, the truck having on its rear side means for receiving the load suspension device / fork of the forklift truck and the forklift truck is provided with a lifting mechanism which is preferably designed as a self-lifting mechanism, for example with a double-acting hydraulic cylinder, characterized in that that the receiving means for the fork (38.1) of the forklift (30) are designed to positively receive and fix an adapter (20) for the particular design of the fork, the forklift (30) and / or its fork (38.1) with the Adapter (20) and the adapter (20) are releasably connectable to the receiving means. 2. Apparatus according to claim 1, characterized in that the adapter (20) with as a support for the claws (34) of the forklift (30) designed, foldable or extendable supports (25.1) is provided. 3. Apparatus according to claim 1 or 2, characterized in that the receiving means (10) for the adapter (20) formed approximately box-like from two with their open sides facing each other, with cross struts (13.1,13.2) connected U-profiles (11) is, the cross struts (13.1,13.2) with the chassis of the truck (1), preferably with its side members (4) are firmly connected. 4. Device according to one of claims 1 to 3, characterized in that the adapter (20) from two further, approximately form-fitting in the U-profiles (II) of the adapter receptacle (10) insertable U-profiles (21), the rear ends (21.1) of which are less than their front ends (21.2), the front ends (21.2) being through a circumferential frame (22) are connected to one another and the circumferential frame (22) and the corrosponding adapter holder (10) are provided with locking means. 5. The device according to claim 4, characterized in that the vertical parts (22.1) of the peripheral frame (22) each have a downward extension (23), at the lower ends of which the claw supports (25.1) are provided. 6. The device according to claim 5, characterized in that the lower ends of the downward extension (23) approximately horizontally aligned, perpendicular to the longitudinal direction of trucks or forklift, tubular receptacles (25) are arranged, in which the claw supports (25.1 ) are guided and stored as telescopic extracts. 7. The device according to claim 6, characterized in that the tubular receptacles (25) for the claw supports (25.1) from with a flat profile (25.3) covered C-profiles are formed, in which the inner telescopic extensions of the extendable claw supports formed as rectangular hollow profiles are stored, with the C-profiles extended towards the longitudinal center and connected to each other. 8. The device according to claim 7, characterized in that the elongated C-profiles of the tubular receptacles (25) for the claw supports (25.1) has a given inward inclination corresponding to the angle (ol). 9. Device according to one of claims 6 to 8, characterized in that the claw supports (25.1) with a pull-out safety are provided. 10. Device according to one of claims 2 to 9, characterized in that the fold-out or extendable claw supports (25.1) are arranged adjustable in height. 11. The device according to claim 10, characterized in that both extensions (23) of the vertical parts (22.1) of the circumferential adapter frame (22) have a number of holes (23.1), the holes (23.1) being arranged one below the other and at a distance from one another , and that the claw supports (25.1) interact with these holes (23.1) in the sense of height adjustability. 12. The apparatus according to claim 11, characterized in that the height-adjustable means are designed as at least one of the vertical sides of the tubular receptacle (25) extending upward and provided with a hole (25.5) tab (25.4). 13. The apparatus according to claim 11 or 12, characterized in that the two extensions (23) of the vertical frame parts (22.1) are each formed by a pair of corrosive perforated flat profiles, the distance between the flat profiles of the outer width of the tubular receptacle (25) for the claw supports (25.1) correspond and preferably both vertical sides of the tubular receptacles are each provided with a tab (25.4). 14. Device according to one of claims 1 to 13, characterized in that the locking means of the adapter receptacle (10) and adapter (20) as a pin (14) on the adapter receptacle (10), preferably at the front, upper end angle (13.2) are formed, each of which a hole (24) in the peripheral frame (22) of the adapter (20) is assigned, the pin (14) guided through the hole (24) by means of a spring pin (14.1) or the like. can be secured. 15. The device according to one of claims 1 to 14, characterized in that at the level of the insertion opening of the adapter (20) a transverse to the insertion direction, insertable support rod (26) is provided, each of at least one tubular bearing (26.1) of the two vertical parts (22.1) of the peripheral frame (22) of the adapter (20) is supported and guided. 16. The apparatus according to claim 15, characterized in that a central bearing (26.2) is provided as an upstanding fork bearing for the support rod (26), the central bearing (26.2) on the lower of the horizontal parts (22.2) of the peripheral frame (22) of the adapter is attached. 17. The apparatus of claim 15 or 16, characterized in that the insertable support rod (26) cooperates with a closure part (27), the closure part (27) having a pin (27.4), and the pin (27.4) in a stacker-fixed tab (39) with a corresponding hole (39.1), preferably on the load-carrying means (38) of the stacker (30), can be inserted and secured.

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