EP2291306A1

EP2291306A1 - Transporting arrangement

Info

Publication number: EP2291306A1
Application number: EP09757219A
Authority: EP
Inventors: Joachim Esser
Original assignee: PracTec GmbH
Current assignee: PracTec GmbH
Priority date: 2008-06-05
Filing date: 2009-05-28
Publication date: 2011-03-09
Also published as: WO2009146836A1; DE102008064332A1

Abstract

The present invention relates to a transporting arrangement (10) for transporting loads by hand, having a basic framework (12) which is formed from sheet metal or metal tubes in the manner of a hand cart and comprises at a bottom end, towards a loading shovel (16), two transporting wheels (14) and in the centre, in the region of the bottom end, a supporting wheel (22) in a first end position. The supporting wheel (22) can be displaced, along the longitudinal extent of the basic framework (12), into a second end position.

Description

Title: Transport device

description

The present invention relates to a transport device for transporting loads by hand with a generally made of metal in the manner of a sack truck base frame comprising a loading bucket and two transport wheels at a lower end.

In the prior art various transport devices are known with which goods or goods can be transported by hand. However, the transport devices are - depending on the purpose - designed very differently. Thus, one- and two-axle transport devices are in use. A typical representative of the uniaxial transport device is the so-called sack truck, which is preferably suitable for transporting individual, large and solid objects.

In the biaxial transport devices, a distinction first between transport and transport trolleys. While a transport roller only has a transport plate mounted on rollers, transport vehicles additionally comprise supporting walls and / or shelves, which are configured very differently depending on a preferred mode of use. Above all, with dolly, several (even many small) items can easily be transported at once. However, you need to drive the trolley in contrast to the sack truck relatively much space. An additional difference between the mono- and biaxial transport devices is that uniaxial transport devices are preferably pushed (but also pulled) and biaxial transport devices in the Be drawn essentially. This means that, for example, when working in a warehouse, the used transport devices must be changed often as needed.

From DE 297 04 996 Ul a transport device is known, which is designed as a sack truck. Thus, the sack truck does not tilt in the loaded state to the rear, a support device is provided, which has two legs and a support wheel attached thereto. The support device is pivotable about the legs, wherein the legs are held in a desired support position via a locking device. This transport device can only be used as a sack truck.

The present invention is based on the object to provide with cost-effective means a transport device, or develop further, which is universally applicable.

To solve the problem is proposed starting from the transport devices of the type mentioned that the support wheel is displaceable in the longitudinal extent of the base frame in a second end position. The transport device thus offers the advantage of being able to convert the uniaxial sack truck into a two-axle transport vehicle, wherein the support wheel forms the second axis. In the first end position of the support wheel, the transport device is to be used as a uniaxial sack truck. In this first end position of the support wheel, the support wheel facilitates pulling the sack truck via a staircase.

The user of the transport device, for example, a warehouse worker, but has the additional advantage of not constantly having to change the transport device when transporting different objects. He can the transport device according to the invention within less Convert seconds and no tools from a single-axle sack truck to a biaxial trolley or transport roller and vice versa. This flexibility allows a very efficient work of the warehouse worker. At the same time a worker only needs a transport device according to the invention and not - as usual - a sack truck and a trolley. This saves considerable costs.

Advantageous developments of the invention are specified in the subclaims. Other important features of the invention can be found in the description and in the drawings, wherein the features both in isolation and in different combinations for the invention may be essential, without being explicitly noted.

Thus, it is further proposed that the support wheel is displaceable in a region of the base frame, which is opposite to the transport wheels. This increases the stability of the biaxial trolley, since both axes are arranged at the two ends of the transport device.

It is particularly advantageous if the support wheel is connected to a drawbar or pull rod, which on the one hand serves to bring the support wheel from the first position to the second position and on the other hand serves to pull the transport device when the transport device is used as a transport vehicle. Thus, the transport device in the second end position of the support wheel as a two-axle trolley can be easily and conveniently pulled over the drawbar. When the jockey wheel is in the first end position and the transport device is used as a hand truck, the transport device is pulled and pushed over separate handles. It is also proposed that in the first end position of the support wheel, a handle of the pull rod in a headband of the base frame, which is arranged opposite the transport wheels, is embedded. This means that on the one hand no tools or tools for the change of the transport device from a sack truck to a trolley are needed and that on the other hand, the handle of the pull rod does not interfere with the operation of the transport device as a sack truck.

It is also advantageous if the support wheel is displaceable in a rail arranged centrally in the longitudinal direction of the base frame and if the first end position and the second end position of the support wheel are designed as end stops on the rail. For this purpose, the jockey wheel includes a sliding block, which slides safely and smoothly in the rail. The stops ensure a defined first and second end position of the support wheel on both sides of the rail and prevent accidental pushing out of the support wheel from the rail. For this purpose, the rail is advantageously designed such that the sliding block engages at the end positions.

In order to enable a steerability of the trolley, it is further proposed that the support wheel can be steered in the second end position. While in the uniaxial application of the transport device, the steering is performed by rotating the separate handles when pushing or pushing the sack truck, a steering device is necessary in the biaxial dolly, which preferably allows rotation of the front in the direction of travel support wheel with the help of the drawbar. For this purpose, the device between the sliding block and the support wheel, for example. An axial deep groove ball bearing. As a result, a turntable is formed, which allows the steerability of the transport device. Furthermore, it is proposed that in the region of the base frame, which is arranged opposite the transport wheels, an additional hinged loading support is arranged. The loading support is folded up during operation of the transport device as a trolley and is advantageously used to secure the items during transport against falling. In the area of the transport wheels, ie on the opposite side of the transport device, the loading shovel (for sack truck operation) serves as a support without conversion measures.

Brief description of the drawings

An embodiment of the invention will be explained in more detail with reference to figures. Show it:

1 shows a transport device in a side view and in a front view in an operation as a hand truck;

Figure 2 shows the transport device of Figure 1 in a side view showing the reconstruction of the transport device;

3 shows the transport device of Figure 1 in one

Side view when operating as a transport vehicle;

Figure 4 is a headband of a base frame of

Transport device of Figure 1 with recessed drawbar in a front view;

Figure 5, the headband with the drawbar of Figure 4 in a side view; Figure 6 shows an attachment of a support wheel of

Transport device of Figure 1 in a sectional view;

Figures 7 to 12 different views of a second embodiment and

Figure 13 is an isometric view of the main body of the second embodiment.

Detailed description

Figure 1 shows a first embodiment of a transport device according to the invention. It is identified in its entirety by the reference numeral 10. 1 shows a side view on the left side and a front view of the transport ^device 10 '^' on the right side of the transport device 10. The transport device 10 comprises a substantially rectangular base frame 12 which is composed of metal tubes like conventional hand trucks In the front view of the lower end of the base frame 12, two transport wheels 14 are rotatably arranged, which are connected to each other by an axle 15. The axle 15 is the first axis of the transport device 10 according to the invention.

The transport wheels 14 at the lower end of the base frame 12 opposite a loading shovel 16 is arranged. The loading shovel 16 together with a side facing the loading shovel 16 of the base frame 12 a loading area of the transport device 10. The loading area opposite (ie on the side that includes the transport wheels 14), the base frame 12 has a tubular formed, bent support device 18. In extension of the support device 18 are on one of the transport wheels 14 opposite End handles 20 provided for using the transport device 10 as a sack truck.

Between the two transport wheels 14, a support wheel 22 is arranged centrally in the base frame 12 in the lower region of the transport device 10 - slightly offset upwards. The outer dimensions of the support wheel 22 substantially correspond to the dimensions of one of the transport wheels 14. Two triangular metal plates 24 on both sides partially surround the support wheel 22 and form a guide for the support wheel 22. The two metal plates 24 are U-shaped interconnected (in FIG 1 not visible) and in a rail 26, which is designed with a C-profile, movably mounted (not visible in Figure 1).

The rail 26 is limited in Figure 1 at an upper end by a perpendicular to the rail 26 extending rohr.förmig configured stop 27. At a projecting from the base frame 12 end of the triangular metal plates 24, the support wheel 22 is rotatably supported by an axis (not visible). At an opposite end of the bearing of the support wheel 22, a tubular designed drawbar 28 is attached to the U-shaped interconnected triangular metal plates 24, in such a way that the drawbar 28 is substantially parallel to the frame 12 in the direction of the handle 20. A detailed description of the design and operation of the support wheel 22 follows in the description of FIG. 6.

The drawbar 28 protrudes up to an upper end of the base frame 12 in FIG. 1 and comprises a T-shaped handle 30, which is detachably embedded in the upper region of the base frame 12. A detailed description of the handle 30 follows in the descriptions of FIGS. 4 and 5. The embodiment of the transport device 10 described for Figure 1 makes it possible to convert the uniaxial, usable as a sack truck transport device 10 in a two-axle trolley. Figure 2 shows the conversion of the transport device 10 of the sack truck in the trolley. In this case, the transport device 10 is already shown in Figure 2 in a position as they can be operated as a trolley, ie with two axes. This means that the transport device 10 is tilted in operation as a trolley with respect to the position in Figure 1 by 90 degrees, so that all three wheels 14, 22 come into contact with the ground. Then the support wheel 22 is pulled in the rail 26 to the stop 27 in the second end position (in Figure 2 to the right).

The dashed line in Figure 2 shows the state of the transport device 10 after the conversion. By guiding the support wheel 22 in the rail 26, the support wheel 22 can be pulled from the region of the transport wheels 14 (first end position) into the region of the grab handle 20 (second end position) by means of the drawbar 28 (see reference numeral 32). The drawbar 28 now projects beyond the frame 12 and can be used as a pull rod for the trolley. The T-shaped designed handle 30 of the drawbar 28 facilitates the pulling of the trolley.

So that the trolley is steerable, the support wheel 22 in the region of the guide in the rail 26, a ball bearing (not visible in Figure 1 to 3), so that the support wheel 22 is rotatable by the drawbar 28 perpendicular to the frame 12. A detailed explanation follows in the description of FIG. 6.

To secure the objects to be transported, a hinged transport support 34 is embedded in the frame 12, which during operation of the transport device 10 as a transport vehicle can be folded parallel to the loading shovel 16 (see reference numeral 36). FIG. 3 shows the transport device 10 which has been completely converted to the transport carriage.

FIG. 4 shows the upper region of the frame 12 in FIG. 1, which is designed as a retaining clip. The headband has a recess 36 which can receive the T-shaped handle 30 of the drawbar 28 during operation of the transport device 10 as a hand truck. The handle 30 is integrated in this position in the frame 12.

In a more comfortable embodiment of the

Transport device 10, the drawbar 28 in an area near the handle 30 against the support surface of the transport device 10 is twice angled (see reference numeral 38). As a result, the handle 30 for the conversion of the transport device 10 to the trolley can be more easily removed from the recess 36. In addition, in this embodiment, the diameter of the handle 30 is slightly thickened relative to the drawbar 28. Thereby, a pulling force for pulling the trolley is better distributed to a palm of the person pulling the trolley, which facilitates the pulling of the trolley.

FIG. 6 shows the support wheel 22 with the device for moving the support wheel 22 in the rail 26 in detail. The support wheel 22 is guided and supported between the two metal plates 24, the metal plates 24 being brought together in a U-shaped manner at the top by a connecting end face 40. On the front side 40, the drawbar 28 is attached (not visible). On the end face 40, a ball bearing 42 is arranged, which forms the connection of the support wheel 22 to a sliding block 44. The sliding block 44 slides in the C-shaped rail 26, wherein the rail 26 at both ends by stops (only the upper stop 27 is visible in Figure 1) is limited. The nut 44 can additionally engage the stops in a recess provided in the rail 26 (not shown). The ball bearing 42 and the U-shaped metal plates 24, 40 form a turntable for the support wheel 22nd

The transport device 10 according to the invention can be used as follows:

When using the transport device 10 as a sack truck, the support wheel 22 is disposed near the transport wheels 14 at a first stop and serves, for example. As support for pulling the sack truck via a staircase. The drawbar 28 is located centrally in the frame 12; the handle 30 is recessed in the recess 36 in the frame 12.

To convert the transport device 10, the handle 30 is removed from the recess 36 and pushes the support wheel 22 which is fixedly connected to the drawbar 28, in the opposite region of the frame 12. This is done by the nut 44, which is connected to the support wheel 22 is connected via the ball bearing 42, slides in the rail 26 from the first stop (first end position) to the second stop (second end position). The transport device 10 is tilted by 90 degrees, so that the transport wheels 14 and the support wheel 22 come into contact with the ground, we obtain a horizontally positioned cargo area. The drawbar 28 now projects beyond the frame 12 and serves as a pull rod for the converted sack truck to the trolley. In addition, the loading support 34 can be folded up parallel to the loading door 16. The arranged between the support wheel 22 and the nut 44 ball bearing 42 supports the steering of the trolley via a pivoting of the drawbar. The reference numeral 46 in Figure 2 shows in a plan view, the position of the support wheel 22 when driving straight ahead; the reference numeral 48 shows a possible impact of the support wheel 22 by pivoting the drawbar 28 during a steering movement. Figure 7 shows an isometric view of a second embodiment of a transport device 10 according to the invention. In connection with the second embodiment, the same reference numerals as for the first embodiment (Figures 1 - 6) are used and it applies the same with respect to the first embodiment. To avoid repetition, only the differences between the embodiments will be explained in more detail.

In the second embodiment, the base frame 12 is formed as a sheet metal construction. The base frame 12 is made by bending sheet metal, preferably steel or aluminum, and then welding them together. The structure and the construction of the base frame 12 can be seen particularly well with reference to FIG.

The base frame 12 is covered by a plate 50, which serves as a loading area. Accordingly, if predominantly sensitive goods are transported, the plate 50 may be made of, for example, wood or a board material coated with rubber or a soft plastic. If insensitive and very heavy loads are to be transported, the plate 50 can also be made of sheet steel, preferably of so-called tear plate.

On the longitudinal sides and the front side of the base frame 12 shown in Figure 7 each cuboid fastening elements 52 are provided. The fastening elements 52 are firmly connected to the base frame 12. Among other things, it is possible to screw the fastening elements 52 to the base frame 12 or to weld. The fastening elements 52 have at least one, but preferably two, mutually orthogonally arranged receiving bores 54. The receiving bores 54 serve to accommodate the transport supports 34, which are formed in the second embodiment as a U-shaped bent pipe sections.

In Figure 7, three transport supports 34.1, 34.2 and 34.3 are shown. The transport support is 34.1 as inserted in the fastening elements 52, where ^s is fixed by means of a clamping screw (not referenced), that the transport support 34.1 is parallel to the plate 50 and does not protrude upwardly above this. Furthermore, the laterally arranged transport supports 34.2 and 34.3 are likewise inserted into the associated fastening elements 52 and likewise fixed there with a clamping screw in such a way that they do not project upwards beyond the plate 50.

In the installed position shown in FIG. 7, the laterally arranged transport supports 34.2 and 34.3 take over the function of the support device 18 according to the first embodiment (see, for example, FIGS. 1 and 3). In order to take over this function, the transport supports 34.2 and 34.3 are formed as a U-shaped pipe section, which is again bent at right angles in the region of the fastening elements 52.

At the upper end of the base frame 12, the second mounting holes 54 in the fasteners 52 are clearly visible. In these second mounting holes 54, the transport support 34.1 can also be inserted (see Fig. 11). For then, when the inventive

Transport device 10 is to be used as a trolley. Then, the transport support 34.1 has the function of the transport support 34 shown in Figure 3. Accordingly, it is possible to insert the transport supports 34.2 and 34.3 vice versa in the fasteners 52 so that they as Side wall of the transport device serve (see also Figures 11 and 12).

In summary, it can be stated that the laterally arranged transport supports 34.2 and 34.3 assume the task of the support device 18 in the position shown in FIG. 7 and can serve as side wall for the transport device 10 according to the invention in the position shown in FIGS. 11 and 12.

The handle 30 is executed in the embodiment of Figure 7 as a closed bracket. In the figures 8 and 9, the second Ausführungsbeάspiel in a view from the front (Figure 8) and in a view from above (Figure 9) is shown. From these views ^", the geometry and arrangement of the transport supports 34.1, 34.2 and 34.3 as well as ^the" Herestxgungse1emente ^~ 52 entnöMrte ^"n ^~ we would recommend ^'rr: rn ^~~ Frgur ^~ 9 ^~ RST especially good to see that the lateral transport supports 34.2 and 34.3 downwardly can take over the function of the support device 18. In Figure 8, the clamping screws 56 of the fasteners 52 are clearly visible.

In the figures 11 and 12, the second embodiment of the transport device 10 according to the invention is converted as a transport vehicle. This happens because the drawbar 28 is pulled out of the base frame 12 and consequently the support wheel 22 is moved to the end of the base frame 12, which is opposite to the transport wheels 14. The drawbar 28 is shown as if it were in the hand of a user of the transport device 10, not shown.

The transport supports 34.1, 34.2 and 34.3 are mounted in the figures 10-12 so that they form together with the loading blade 16 four side walls of a trolley. - -

14

Of course, it is also possible, for example, to bring only the transport support 34.1 in the position shown in Figures 10 - 12 and the lateral transport supports 34.2. and 34.3 in the position as shown in Figures 1 to 9.

It is clear from the comparison of FIGS. 7 to 9 and 10 to 12 that with just a few movements from a full-value hand truck an equally full-value transport vehicle with four lateral side walls can be formed. By the construction of the base frame 12 as a sheet metal construction, the load capacity is increased again, so that easily loads with a weight of several 100 kg can be transported on the trolley. Accordingly, the inclusion of the axis 15 (see Figure 13) by the large load-bearing cross-sections extremely resilient.

FIG. 13 shows in an isometric view the base frame 12 without internals. From this illustration, the structure of the base frame 12 can be seen from folded sheets, which are welded together. The extremely sturdy mount of the axles 15 is also clearly visible.

Claims

claims

1. Transport device (10) for transporting loads by hand with a base frame (12) having at a lower end against a loading shovel (16) two transport wheels (14), characterized in that centrally (16) between the transport wheels (14 ), a support wheel (22) is arranged, and that the support wheel (22) on an the transport wheels (14) opposite end of the base frame (12) can be arranged.

2. Transport device (10) according to claim 1, characterized in that the support wheel (22) in the longitudinal direction of the base frame (12) between a first end position and a second end position is displaceable.

3. Transport device (10) according to claim 1 or 2, characterized in that the support wheel (22) with a drawbar (28) is connected.

4. Transport device according to claim 3, characterized in that the drawbar (28) as a traction and handlebar for the transport device (10) is usable.

5. Transport device (10) according to one of the preceding claims, characterized in that in the first end position of the support wheel (22) a handle (30) of the drawbar (28) in a headband of the base frame (12) of the transport wheels (14). is arranged opposite, is embedded.

6. Transport device (10) according to one of the preceding claims, characterized in that the support wheel

(22) comprises means with which the support wheel (22) in a centrally in the longitudinal extent of the base frame (12) arranged rail (26) is displaceable.

7. Transport device (10) according to claim 6, characterized in that the first end position and the second end position of the support wheel (22) are characterized by stops on the rail (26).

8. Transport device (10) according to one of the preceding claims, characterized in that the support wheel

(22) is steerable in the second end position.

9. Transport device (10) according to any one of the preceding claims, characterized in that the transport device (10) in the first end position of the support wheel (22) as a sack truck and in the second end position of the support wheel (22) can be used as a transport vehicle.

10. Transport device (10) according to one of the preceding claims, characterized in that on the base frame (12) at least one loading support (34, 34.1, 34.2, 34.3) is provided.

11. Transport device (10) according to claim 10, characterized in that the loading supports (34.1, 34.2, 34.3) can be mounted in at least two different positions.

12. Transport device (10) according to claim 10, characterized in that at least one loading support (34) is hinged.

13. Transport device (10) according to one of the preceding claims, characterized in that the base frame

(12) consists essentially of metal pipes.

14. Transport device (10) according to one of the preceding claims, characterized in that the base frame

(12) consists essentially of sheet metal, in particular bent sheet metal.