DE2349315A1 - Crash bar for rear of lorry - with laminated plastic construction reinforced with woven inlays placed below loading platform - Google Patents

Abstract

The crash bar is supported at the rear of the lorry to prevent small vehicles from driving under the loading platform in a rear collision. The bar is made from parallel strips of elastic platic reinforced with sandwiched layers of metal or fibre strips or mats. These are bonded into the plastic and are secured at each end of the bar on metal plates embedded in the plastic. The rear outside face of the crash bar is fitted with soft plastic trim edges to form box-like areas to house the number plate and lights etc. The bar is fitted to the lorry by angled metal strips, secured to the anchoring plates and designed to absorb a certain impact without distorting.

Description

Dr Röbe-Oltmann S 62 Wiesbaden, September 26th, 1995

Dotzheimer Strasse 61 Patent attorney - telephone (06121) 41905

Telegram code: Patentjura Wiesbaden

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Applicant: Mr. Heinz Hees, 6095 Ginsheim-Gustavsburg 2, Neckarstrasse 47

Underrun protection

The ever increasing number of injuries and plumbing and the constantly increasing material damage in road traffic, the are based on the fact that smaller motor vehicles, in particular passenger cars, from behind under vehicles with overhead Driving a loading platform forces vehicles with a high platform to be covered with an underride guard Mistake.

is known on vehicles with overhead loading platform at the rear end under this rigid facilities in To provide some kind of steel bumpers that are approximately 60 cm above the road surface. By such Rigid and hardly yielding equipment in the event of a collision, e.g. with a car, can cause vehicles with high-lying Platform can be avoided by small vehicles, especially passenger cars. Depending on the speed difference between the approaching vehicle and the vehicle rammed from behind are the and material damage is still very significant. With a stationary vehicle with a high loading platform and the This underrun protection, for example, acts like a solid wall. The material and personal

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damage is correspondingly high.

The object of the present invention is to create an underrun protection that not only prevents vehicles from being driven under with a high platform prevented by smaller vehicles, especially passenger cars, but also passenger and material damage in the event of a vehicle impact on the underrun protection is significantly reduced.

This task is achieved in particular by a device at the rear end under the platform of motor vehicles, trailers and the like. arranged, from a lying horizontally and transversely to the longitudinal axis of the vehicle, with the land attached to the vehicle Existing bar underrun protection, in which the Baiken is made of elastically flexible material.

Impacts a vehicle with such an underrun protection On a smaller vehicle, the impact energy through the beam is made of elastically resilient to a considerable extent Material caught. The material and personal injuries are correspondingly lower. In the case of only a light impact, it is possible that no personal injury or material damage occurs.

The required strength and elasticity of the beam can be easily achieved by selecting the appropriate Material of which it is made.

It is useful here to make the bar from two or more, interconnected, one behind the other in the width of the bar to produce arranged layers, between which reinforcements are preferably arranged.

Metallic materials are suitable as reinforcement,

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IT natural fibers, synthetic fibers, mineral fibers and the like.

"Advantageously, the reinforcements consist of braided, parallel the longitudinal axis of the bar arranged strands or the like, or made of woven inlays, the chain of which is expediently parallel runs along the longitudinal axis of the beam. The reinforcement should extend over the entire length of the beam.

Further features of the invention are shown in the description of the figures and in the subclaims, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

In the pig. 1 to 4 is the invention in one embodiment and in Pig 5 in a production scheme, for example shown without being limited to this embodiment to be.

Pig. 1 shows the rear view of an underrun protection device according to the invention
a supervision

a vertical section along the line A - A in Pig. 1

the attachment to a motor vehicle and schematically the side view of a system for Manufacture of the beam

In the pig. 1 to 4, the beam 1 consists of elastically resilient Material from several layers 4> which are arranged one behind the other in the width of the beam 1. Between the layers 4 are arranged strand-shaped reinforcements 5 made of metallic material. On the back in the direction of travel On the side of the beam 1, a layer 6 of soft, suitably foam rubber-shaped material is provided. These

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Pig. 2 Pig. ⁵ Pig. 4th Pig. 5

The oak layer 6 is expediently designed in a box-shaped or U-shaped manner, open to the rear. In the recess thus formed the rear lighting, license plate, etc. 10 can be installed. In addition to the reinforcement 5, between the layers 4 is expediently at both ends of the beam 1 an anchor plate 9 is provided through which the fastening means, e.g. Eopf screws, for fastening the beam 1 are guided on a cross member 8 made of resilient, metallic material. By means of this in the direction of travel forward curved Eraverse 8 is the beam 1 on the substructure of the Platform of the vehicle 2 attached. For attachment to the substructure of the vehicle 2 are expediently arranged on this vertical traverses 11, which carry clamping jaws 7 which overlap the traverse 8.

The underrun protection should be arranged at the rear end of the vehicle if possible, but no longer if possible as offset about 70 cm forwards from the rear end of the platform. For vehicles with trailer hitches the underrun protection according to the invention is expediently at least 15-20 cm behind the outer one in the direction of travel Attached to the end of the coupling.

Through the layer of soft material, especially when the impact energy is very low, a Lessening the need to worry and reducing the potential Damage reached.

Through the appropriate selection of the elastically flexible material, through the appropriate choice of the number of layers and the reinforcement, the type and strength of which can reduce the strength and flexibility of the underrun protection without Difficulties can be adjusted to the required values.

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The bar is made of elastic material, for example rubber, in particular old rubber from shredded old tires, to which natural, artificial or mineral fibers can be added to increase the tensile strength. This mixture is (Pig. 5) ^L ^ ulper 21 mixed with the binder and with one another. The mixture is then fed to a Fourdrinier wire device 22, from which it passes into a roller press in which the resulting Ylies is pre-compressed and then into a drying tunnel 24 in which the Ylies is vulcanized, condensed or polymerized The strand is cut to the required individual lengths in a cross cutter 25. The individual layers are laid one on top of the other in a heatable molding box 26, the tensile reinforcement and anchor plates being placed between the layers at the same time has a heatable stamp that finally solidifies the beam.

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Claims (11)

Expectations: 1.) At the rear end under the platform of motor vehicles, / Trailers etc. arranged underrun protection from one Beams arranged horizontally and transversely to the longitudinal axis of the vehicle and attached to the vehicle, characterized in that that the beam (1) consists of elastically yielding material and at its ends on the vehicle is attached. 2.) Underrun protection according to claim 1, characterized in that the bar (1) consists of two or more, with one another connected layers $ 4) arranged one behind the other in the width of the bar (1). 3.) Underrun protection according to claim 1 and / or 2, characterized in that that reinforcements (5) are arranged between the layers (4). 4.) Underrun protection according to claim 3 »characterized in that the reinforcements (5) made of metallic material and / or inter alia door fibers and / or synthetic fibers and / or mineral fibers exist. 5.) Underrun protection according to claim 3 and / or 4 »characterized in that that the reinforcements (5) made of braided, arranged parallel to the longitudinal axis of the beam (1) Strands or the like. exist. 509816/0052 6.) Underrun protection according to claim 3 and / or 4, characterized characterized in that the reinforcements (5) are made of woven material, the sides being expediently parallel the longitudinal axis of the beam (1) runs. 7.) Underrun protection according to one or more of claims 3 to 6, characterized in that the reinforcements (5) extend over the entire length of the bar (1). 8.) Underrun protection according to one or more of claims 1 to 7j, characterized in that on the in! Direction of travel rear side of the beam (1) a layer (6) of soft, expediently foam-rubber-like material is arranged. 9.) underrun protection according to claim 8, characterized in that the layer (6) made of soft material box-shaped, is designed to be open to the rear. 10.) Underrun protection according to one or more of claims 1 to 9, characterized in that at both end ends of the beam (1) between the layers (4) anchor plates (9), suitably metallic, are used. 11.) Underrun protection according to one or more of claims 1 to 10, characterized in that the bar (1) for attachment to the vehicle (2) on the in the direction of travel front side a fixed, but detachable, connected to it, curved forward in the direction of travel iraverse (8) made of resilient, metallic material. 509816/0052 Blank page