DE8912968U1 - Pivoting drive-over bridge for ramps - Google Patents

Description

Our No. 26 307

Van Wijk Nederland B.V.

Bouwweg 14 NL-8203 AA Lelystad

Pivoting bridge for Pampen

The subject of the innovation is a drive-over bridge for ramps with a bridge platform that can be pivoted around a horizontal axis at its ramp-side end, which has an extension that can be pivoted out and in to rest on the loading area to be loaded or unloaded and in which this extension has one or more foldable segments to adapt to narrow vehicles or vehicles that do not approach centrally.

These segments are detachably connected to the extension and fold out together with it. If the segments encounter resistance during folding out, for example against the body of a vehicle, the connection between the segment and the extension breaks, the extension folds out further and the segment falls back into its original position.

Known bridges have special magnets or drivers with a positive locking mechanism based on restoring force as a releasable locking element, as described in DE-OS 34 07 165. However, these designs are prone to failure because they easily become dirty, and the solutions are material- and labor-intensive.

The aim of the innovation is to make the releasable locking mechanism simple and inexpensive.

This goal is achieved by a rod attached to the hinged segment extending into the area of the extension and engaging a driver part there. This driver part consists of an abutment attached to the extension and an H spring element attached to the extension, which is designed in such a way that at the free end of the

f| spring element the distance between the spring element and the

p abutment is smaller than the diameter of the bar. The

ff Rod can be inserted with little effort between the abutment and

& spring element can be pressed in and pushed out again just as easily. The spring element preferably consists of ^: : a suitably curved leaf spring, but it is

*| also possible to make the entire driver part from a

, i.e. curved leaf spring.

The innovation is further explained using the drawings:

;; Fig. 1 shows a longitudinal section through the bridge

with extended extension and folded down |} segment.

ü Fig. 2 shows the top view in the position according to Fig. 1.

H ix ti

Il Fig. 3 shows the extension and the segment in locked

|| tem state from below.

&ngr; Fig. 4 shows the details of the innovation in the position

fi. in accordance with paragraph 1.

Fig. 5 shows a front view of the bridge with extension and segments in the resting state.

Det. A shows the details of the driver part.

The loading bridge (1) with the extension (3) that can rotate around the axis (2) is attached to the ramp wall (10) so that it can rotate around the horizontal axis (9). In order to be able to place the extension (3) on a loading area (7) that is narrow or not in the middle in front of the loading bridge, the loading bridge (1) has one or more segments (6) that can also rotate around the axis (2).

These segments (6) are connected to the extension (3) in the resting state because the rod (13) attached to the segment (6) is located between the abutment (15) and the spring element (14), both of which are attached to the extension (3) (see detail A). The design of the spring element (13), which is shown as a leaf spring in Fig. 4 and detail A, holds the rod (13) in place because the distance "a" between the abutment and the free end of the spring element is smaller than the diameter of the rod. The extension (3) rests in lip catchers (5) attached to the supports (4), whereby the supports can be part of a lower frame of the bridge. The segments (6) are not supported in the resting state (see Fig. 5).

If the loading area (7) of a vehicle is in front of the ramp (10), the platform (1) can be swiveled upwards using a drive (not shown) and the extension (3) can be folded out. The segments (6) that are connected to the extension (3) via the rod (13) and the driver part (14, 15) are also folded out. If a segment (6) encounters resistance when folding out, for example against the side of the vehicle body (8), the spring element (14) allows the rod (13) to be pushed out of the driver position and the segment (6) folds back into the starting position by gravity until the stop (12) attached to the segment (6) touches the front of the platform.

The platform (1) can now be lowered without hindrance, since there is no support (4) with lip catchers (5) for (horizontal) rest in the area of the segments (6).

This creates the situation shown in Fig. 1 and 2. The extension (3) rests on the loading area (7), the segment (6) is folded down. The loading process can take place.

After the loading process is complete, the vehicle drives away and the extension folds down under its own weight, either

1) until it hits the front of the platform (1) with the stop (11) attached to the extension (3) or

2) until it hits the lip catcher (5) of the support (4).

In the first situation, when the extension (3) is folded down, the driver part (14, 15) attached there is pressed against the rod (13) attached to the segment and the rod (13) engages in the driver part (14, 15). The platform (1) can then be lowered back into the rest position shown in Fig. 5.

In the second situation mentioned above, the platform (1) must be raised until the extension (3) is above the lip catcher (5) of the support (4). The extension (3) rotates downwards until the stop (11) hits the front of the platform (1). The rod (13) is then pressed back into the driver part (14,15) and the platform (1) can be lowered into the rest position.

·> t

If the vehicle does not move away, the platform (1) can also be raised until the extension (3) can fold down. In this case, it also folds down until the stop (11) hits the front of the platform (1). In this case, too, the rod (13) is pressed into the driver part (14,15). By lowering the platform, the rest position is restored as shown in Fig. 5.

The system can be expanded by attaching several foldable segments (6) to the sides according to the wishes and circumstances of the individual case, so that there is greater variability in terms of the vehicle width. In this case, the driver part (14, 15) can be attached either to the segment (6) further inside or to the extension (3) for all segments. To ensure that several segments do not fold away accidentally, the spring force of the driver part must then increase from the outside to the inside.

Claims (6)

- 6 Protection claims 1. A drive-over bridge (1) that can be pivoted about a horizontal axis (9) at the ramp-side end, with an extension (3) that can be pivoted out and in about the axis (2) for laying on the loading area (7) to be loaded and unloaded, and lip catchers (5) attached to supports (4) for storing the drive-over bridge in the resting state, the extension (3) having one or more foldable segments (6) for changing the support width, each of which is connected to the extension (3) via a detachable driver, characterized by 1.1 a rod (13) attached to the segment (6) and extending into the area of the extension (3), 1.2 a driver part attached to the extension (3) for the rod (3), consisting of 1.2.1 an abutment (15) mounted at right angles to the extension (3) and 1.2.2 a spring element (14) attached to the extension (3), the distance of which from the abutment (15) at the end of the free end of the spring element (14) is smaller than the diameter of the rod (13), and 1.3 a stop (12) attached to the segment, which rests against the front of the bridge (1) when the segment (6) is in the rest position. 2. Crossing bridge according to claim 1, characterized in that the spring element (14) is a leaf spring. 3. Crossing bridge according to claim 1, characterized in that the driver part formed by the abutment (15) and spring element (14) consists of one piece, such as a bent leaf spring. 4. Crossing bridge according to claims 1 to 3, characterized in that the supports (4) with the lip catchers (5) for the rest position are arranged only in the area of the extension (3), but not in the area of the segments (6). 5. Crossing bridge according to claims 1 to 4, characterized in that a stop (11) is arranged on the extension (3). 6. Overpass bridge according to one of claims 1 to 5, characterized in that the extension (3) has more than two segments (6), whereby 6.1 the driver parts (14,15) for the rods (13) attached to the individual segments (6) are attached either to the extension (3) or to the next part (segment or extension) located further inside and 6.2 the spring force of the spring elements (14) increases from the outside to the inside.