DE29514756U1 - Four-wheel platform wagon - Google Patents

Description

Description

The innovation relates to a four-wheeled platform trolley which is supported on the ground by four rollers arranged at the corners of a rectangular floor plan and has at least one push bar which is fastened to one of the platforms or to a surrounding frame assigned to at least the lowest platform and is formed by a one-piece profile 1 material cut, is U-shaped in the horizontal projection and which essentially comprises vertically projecting bars which mark the loading height of the trolley and a transversely directed bar part which spans the entire width of the floor plan of at least the largest platform.

The well-known and common platform wagons of this type are usually equipped with an upright push bar on at least one side, but mostly on both ends, which is essentially U-shaped and is attached to the lowest platform or a frame surrounding it via the free ends of its vertically upright legs. The upright legs of the U-shaped push bar, with their vertically directed, upright length sections forming upright bars, essentially limit the loading height of the platform wagon. In addition, the vertically directed, upright length sections of the push bar, forming upright bars, have a more or less slight outward bend at their upper end, so that the transversely directed part of the bar lies slightly outside the floor plan of the wagon's platform. Based on the fact that the known platform trolleys are usually supported against the ground by two swivel castors and two fixed castors suspended so that they can rotate around fixed axes, the known and common design of the push bar results in a shortcoming in that the trolleys are relatively difficult to maneuver due to the push bar design, which favors a more or less central attack by the operator.

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and are therefore usually operated in such a way that the operator grasps the push bar which is attached to the lowest platform or a frame surrounding it next to the castors. This is particularly because if the force is applied more or less centrally to the push bar, at least with normal force, no steering moment sufficient to maneuver the cart even in confined spaces can be exerted on the castors opposite the push bar. The same situation essentially arises with platform carts which have a protruding vertical wall instead of a push bar and are equipped with a push handle connected to it. With such carts, too, the operator's hand grip is essentially in the middle of the push handle and therefore at a distance from the long sides of the cart and thus ultimately in a highly unfavorable place for exerting a steering moment.

The innovation is based on the technical task of improving a four-wheeled platform wagon of the type described above without any additional effort so that it is easier to maneuver.

This task is solved in accordance with the innovation by arranging the bar part of the push bar on the downwardly bent length sections of the upright beams. The downwardly bent length sections of the upright beams ensure that the platform trolley has force application options in the area of the push bar and at the same time at the two outermost points of the width of the trolley, thus ensuring the possibility of applying a sufficient steering moment also with regard to the steering rollers opposite the push bar, even with normal force exerted by the operator. A particularly advantageous feature of the innovative push bar design is that it almost necessarily requires the operator to handle the trolley in the

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Hand in hand with the advantage of better maneuverability of the trolley, in some cases the loading height of the trolley can also be increased, as the vertically projecting beams of the push bar can be made higher than with the conventional push bar design, despite the ergonomically favorable arrangement of the handles. Finally, the innovative design of the push bar is characterized by the fact that it can be used equally well for platform trolleys equipped with just two swivel castors as well as for platform trolleys equipped with four swivel castors.

Preferably, in connection with a downwardly bent design of the upright beams of the push bar of the platform trolley, it is provided that the length of the downwardly bent length sections of the upright beams of the push bar corresponds to at least the length of a handle and that a handle is arranged on each of the downwardly bent length sections of both upright beams of the push bar. This promotes the actual use of the possibility outlined by the push bar design to improve the maneuverability of the trolley by the respective operator.

In a particularly practical design of the platform trolley, the downwardly bent length sections of the upright bars of the push bar are positioned outwards from the floor plan of the platform trolley and form an angle of between 30 and 50° with the vertical.

In addition, in a suitable further development, it can also be provided that the handles arranged on the downwardly bent length sections of the upright bars of the push bar are each provided with a

are equipped with protective bars to protect the operator from possible injuries when manoeuvring the flatbed truck in confined spaces, even if the operator handles it carelessly.

In order to protect the operator from possible injuries to their hands when manoeuvring in confined spaces, even if the platform trolley is handled carelessly, another simple implementation can also provide that the downwardly bent length sections of the upright bars are also aligned in a converging manner towards the middle of the trolley and that the bar part of the push bar has a smaller width than the mutual distance between the two upright bars.

In a modification of the above-mentioned embodiment, which provides equally favorable protection for the operator's hands, it can also be provided that the downwardly bent length sections of the upright bars are arched in addition to the longitudinal center of the carriage Tii-n and the bar part of the push bar has a width that essentially corresponds to the mutual distance between the two upright bars. Both of the above-mentioned modified embodiments have in common that no additional parts, such as protective bars or the like, are required to ensure protection for the operator's hands and that, in the course of the measures to protect the operator's hands, no parts protruding beyond the side planes of the carriage are required. 25

The innovation is described in detail in the following example description using an example shown in the drawing. In the drawing, the

Figure 1 is a diagrammatic representation of a platform wagon equipped with the new features;

Figure 2 is a side view of a push bar for a platform trolley according to the invention;

Figure 3 is a front view of a push bar for an innovative platform trolley.

Figure 4 is a partial diagrammatic representation of the two front end areas of a platform wagon according to Figure 1;

Figure 5 is a front view of a modified embodiment of a push bar for a platform trolley according to the innovation;

Figure 6 is a plan view of the push bar according to the embodiment of Figure 5;

Figure 7 is a side view of the push bar according to the embodiment of Figure 5;

Figure 8 is a front view of a further modified embodiment of a push bar for a platform trolley according to the innovation;

Figure 9 is a plan view of the push bar according to the embodiment of Figure 8;

The platform wagon shown in the drawing for the example example has a lower 1 and an upper platform 2, each with a congruent rectangular base. The platform wagon is secured to the ground by means of

a pair of fixed rollers 4 connected to a frame 3 surrounding its lower platform 1, rotating about fixed axes, and a pair of additional swivel castors 5 that can pivot about a vertical axis, whereby both the fixed rollers 4 and the swivel rollers 5 are connected to the frame 3 by means of a yoke 6 or 7, respectively. The platform trolley is equipped with a push bar 8 or 9 on each of its two front sides, whereby each of the two push bars consists of a one-piece profile material cut and comprises vertically projecting length sections forming the 10 and a transversely directed bar part 11. The length sections of the push bars forming the projecting 10 are attached with their free ends to the frame 3 surrounding the lower platform 1 and are also connected to the frame 3 surrounding the upper platform 2 in the area of their remaining length. In their length range projecting above the upper platform 2, the upright bars 10 of the push bars 8 and 9 each have a downwardly bent length section 12 to which the transverse bar part 11 of the respective push bar 8 and 9 is connected. The length of the downwardly bent length sections 12 of the upright bars 10 of the push bars 8 and 9 corresponds at least to the length of a handle 13. The handles 13 arranged on the downwardly bent length sections 12 of both upright bars 10 of the push bars 8 and 9 are each equipped with a protective bar 14. Finally, it can be seen in particular from the illustration in Figure 2 that the downwardly bent length sections 12 of the upright beams 10 of the push bars 8 and 9 are positioned outwards from the floor plan of the platform wagon and form an angle of between 30 and 50° with the vertical. The embodiment shown in Figures 4 to 7 is particularly characterized by the fact that the downwardly bent length sections 12 of the upright beams 10 are also aligned in a converging manner towards the longitudinal center of the wagon, with the bar part 11 of the push bar having a smaller width than the mutual distance between the two upright beams 10. This allows

Maneuvering in confined spaces can also provide effective protection for the operator's hands, as the handle areas of the push bar are located within the width of the cart by a sufficient amount. In the further modification of the design of the push bar shown in Figures 8 and 9, the downwardly bent length sections 12 of the uprights 10 in the handle area of the push bar are also curved towards the middle of the cart. The bar part of the push bar has a width corresponding to the mutual distance between the two uprights 10, but this design also offers safe protection for the operator's hands when maneuvering in confined spaces.

Claims (8)

EXPRESSO DEUTSCHLAND TRANSPORTGERÄTE GMBH. Antonius-Raab-Str. 19 34123 Kassel Four-wheeled platform truck10 PROTECTION CLAIMS: 1) Four-wheeled platform wagon, which is supported against the ground by four rollers arranged at the corners of a rectangular floor plan and has at least one push bar which is attached to one of the platforms or to a surrounding frame assigned to at least the lowest platform and is formed by a one-piece profile material cut, is U-shaped in the horizontal projection, which essentially comprises vertically projecting bars which mark the loading height of the wagon and a transversely directed bar part which spans the entire width of the floor plan of at least the largest platform
characterized in that the bracket part of the push bar is arranged on the downwardly bent length sections of the upright bars. 2) Platform trolley according to claim 1, characterized in that the length of the downwardly bent length sections of the upstanding bars of the push bar corresponds at least to the length of a handle. 3) Platform trolley according to claim 1 and 2, characterized in that a handle is arranged on the downwardly bent longitudinal sections of both upstanding bars of the push bar. 4) Platform trolley according to claims 1 to 3, characterized in that the downwardly bent longitudinal sections of the upstanding ridges of the push bar are positioned outwards relative to the floor plan of the platform trolley. 5) Platform trolley according to claims 1 to 4, characterized in that the downwardly bent longitudinal sections of the upstanding bars of the push bar enclose an angle of between 20° and 40° with the vertical. 6) Platform trolley according to claims 1 to 5, characterized in that the handles arranged on the downwardly bent longitudinal sections of the upstanding legs of the push bar are each equipped with a protective bar. T) Platform wagon according to claims 1 to 5, characterized in that the downwardly bent longitudinal sections of the upstanding beams are additionally aligned converging towards the longitudinal center of the wagon and the bracket part of the push bar has a smaller width compared to the mutual distance between the two upstanding beams. 8) Platform wagon according to claims 1 to 5, characterized in that the downwardly bent longitudinal sections of the upstanding beams are additionally arched towards the longitudinal center of the wagon and the bracket part of the sliding bracket has a width that essentially corresponds to the mutual distance between the two upstanding beams.